| Message ID | 1533928331-21303-1-git-send-email-jeff.lien@wdc.com (mailing list archive) |
|---|---|
| State | Changes Requested |
| Headers | show |
| Series | Performance Improvement in CRC16 Calculations. | expand |
On Fri, 2018-08-10 at 14:12 -0500, Jeff Lien wrote: > This patch provides a performance improvement for the CRC16 calculations done in read/write > workloads using the T10 Type 1/2/3 guard field. For example, today with sequential write > workloads (one thread/CPU of IO) we consume 100% of the CPU because of the CRC16 computation > bottleneck. Today's block devices are considerably faster, but the CRC16 calculation prevents > folks from utilizing the throughput of such devices. To speed up this calculation and expose > the block device throughput, we slice the old single byte for loop into a 16 byte for loop, > with a larger CRC table to match. The result has shown 5x performance improvements on various > big endian and little endian systems running the 4.18.0 kernel version. Thanks. This seems a sensible tradeoff for the 4k text size increase. > diff --git a/crypto/crct10dif_common.c b/crypto/crct10dif_common.c [] trivia: > +static const __u16 t10_dif_crc_table[16][256] = { > + { > + 0x0000u, 0x8BB7u, 0x9CD9u, 0x176Eu, 0xB205u, 0x39B2u, 0x2EDCu, 0xA56Bu, All the 'u's are unnecessary visual noise.
On Fri, 10 Aug 2018, Jeff Lien wrote: > This patch provides a performance improvement for the CRC16 calculations done in read/write > workloads using the T10 Type 1/2/3 guard field. For example, today with sequential write > workloads (one thread/CPU of IO) we consume 100% of the CPU because of the CRC16 computation > bottleneck. Today's block devices are considerably faster, but the CRC16 calculation prevents > folks from utilizing the throughput of such devices. To speed up this calculation and expose > the block device throughput, we slice the old single byte for loop into a 16 byte for loop, > with a larger CRC table to match. The result has shown 5x performance improvements on various > big endian and little endian systems running the 4.18.0 kernel version. You are nevertheless increasing the kernel size by 7.5 KB. Could the small table still be preserved with a config option for those who require small more than fast? That could look like: static const __u16 t10_dif_crc_table[][256] = { { [...] }, #ifndef CONFIG_CRC16_SMALL { [...] [...] }, #endif }; and the code to suit. Nicolas
On Fri, 10 Aug 2018, Joe Perches wrote: > On Fri, 2018-08-10 at 14:12 -0500, Jeff Lien wrote: > > This patch provides a performance improvement for the CRC16 calculations done in read/write > > workloads using the T10 Type 1/2/3 guard field. For example, today with sequential write > > workloads (one thread/CPU of IO) we consume 100% of the CPU because of the CRC16 computation > > bottleneck. Today's block devices are considerably faster, but the CRC16 calculation prevents > > folks from utilizing the throughput of such devices. To speed up this calculation and expose > > the block device throughput, we slice the old single byte for loop into a 16 byte for loop, > > with a larger CRC table to match. The result has shown 5x performance improvements on various > > big endian and little endian systems running the 4.18.0 kernel version. > > Thanks. > > This seems a sensible tradeoff for the 4k text size increase. More like 7.5KB. Would be best if this was configurable so the small version remained available. Nicolas
On Fri, Aug 10, 2018 at 02:12:11PM -0500, Jeff Lien wrote: > This patch provides a performance improvement for the CRC16 calculations done in read/write > workloads using the T10 Type 1/2/3 guard field. For example, today with sequential write > workloads (one thread/CPU of IO) we consume 100% of the CPU because of the CRC16 computation > bottleneck. Today's block devices are considerably faster, but the CRC16 calculation prevents > folks from utilizing the throughput of such devices. To speed up this calculation and expose > the block device throughput, we slice the old single byte for loop into a 16 byte for loop, > with a larger CRC table to match. The result has shown 5x performance improvements on various > big endian and little endian systems running the 4.18.0 kernel version. > > FIO Sequential Write, 64K Block Size, Queue Depth 64 > BE Base Kernel: bw=201.5 MiB/s > BE Modified CRC Calc: bw=968.1 MiB/s > 4.80x performance improvement > > LE Base Kernel: bw=357 MiB/s > LE Modified CRC Calc: bw=1964 MiB/s > 5.51x performance improvement > > FIO Sequential Read, 64K Block Size, Queue Depth 64 > BE Base Kernel: bw=611.2 MiB/s > BE Modified CRC calc: bw=684.9 MiB/s > 1.12x performance improvement > > LE Base Kernel: bw=797 MiB/s > LE Modified CRC Calc: bw=2730 MiB/s > 3.42x performance improvement Did you also test the slice-by-4 (requires 2048-byte table) and slice-by-8 (requires 4096-byte table) methods? Your proposal is slice-by-16 (requires 8192-byte table); the original was slice-by-1 (requires 512-byte table). > __u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, size_t len) > { > - unsigned int i; > + const __u8 *i = (const __u8 *)buffer; > + const __u8 *i_end = i + len; > + const __u8 *i_last16 = i + (len / 16 * 16); 'i' is normally a loop counter, not a pointer. Use 'p', 'p_end', and 'p_last16'. > > - for (i = 0 ; i < len ; i++) > - crc = (crc << 8) ^ t10_dif_crc_table[((crc >> 8) ^ buffer[i]) & 0xff]; > + for (; i < i_last16; i += 16) { > + crc = t10_dif_crc_table[15][i[0] ^ (__u8)(crc >> 8)] ^ > + t10_dif_crc_table[14][i[1] ^ (__u8)(crc >> 0)] ^ > + t10_dif_crc_table[13][i[2]] ^ > + t10_dif_crc_table[12][i[3]] ^ > + t10_dif_crc_table[11][i[4]] ^ > + t10_dif_crc_table[10][i[5]] ^ > + t10_dif_crc_table[9][i[6]] ^ > + t10_dif_crc_table[8][i[7]] ^ > + t10_dif_crc_table[7][i[8]] ^ > + t10_dif_crc_table[6][i[9]] ^ > + t10_dif_crc_table[5][i[10]] ^ > + t10_dif_crc_table[4][i[11]] ^ > + t10_dif_crc_table[3][i[12]] ^ > + t10_dif_crc_table[2][i[13]] ^ > + t10_dif_crc_table[1][i[14]] ^ > + t10_dif_crc_table[0][i[15]]; > + } Please indent this properly. crc = t10_dif_crc_table[15][i[0] ^ (__u8)(crc >> 8)] ^ t10_dif_crc_table[14][i[1] ^ (__u8)(crc >> 0)] ^ t10_dif_crc_table[13][i[2]] ^ t10_dif_crc_table[12][i[3]] ^ t10_dif_crc_table[11][i[4]] ^ ... - Eric
On 2018-08-10 03:12 PM, Jeff Lien wrote: > This patch provides a performance improvement for the CRC16 calculations done in read/write > workloads using the T10 Type 1/2/3 guard field. For example, today with sequential write > workloads (one thread/CPU of IO) we consume 100% of the CPU because of the CRC16 computation > bottleneck. Today's block devices are considerably faster, but the CRC16 calculation prevents > folks from utilizing the throughput of such devices. To speed up this calculation and expose > the block device throughput, we slice the old single byte for loop into a 16 byte for loop, > with a larger CRC table to match. The result has shown 5x performance improvements on various > big endian and little endian systems running the 4.18.0 kernel version. > > FIO Sequential Write, 64K Block Size, Queue Depth 64 > BE Base Kernel: bw=201.5 MiB/s > BE Modified CRC Calc: bw=968.1 MiB/s > 4.80x performance improvement > > LE Base Kernel: bw=357 MiB/s > LE Modified CRC Calc: bw=1964 MiB/s > 5.51x performance improvement > > FIO Sequential Read, 64K Block Size, Queue Depth 64 > BE Base Kernel: bw=611.2 MiB/s > BE Modified CRC calc: bw=684.9 MiB/s > 1.12x performance improvement > > LE Base Kernel: bw=797 MiB/s > LE Modified CRC Calc: bw=2730 MiB/s > 3.42x performance improvement > > Reviewed-by: Dave Darrington <david.darrington@wdc.com> > Reviewed-by: Jeff Furlong <jeff.furlong@wdc.com> > Signed-off-by: Jeff Lien <jeff.lien@wdc.com> > --- > crypto/crct10dif_common.c | 605 +++++++++++++++++++++++++++++++++++++++++++--- > 1 file changed, 569 insertions(+), 36 deletions(-) > > diff --git a/crypto/crct10dif_common.c b/crypto/crct10dif_common.c > index b2fab36..40e1d6c 100644 > --- a/crypto/crct10dif_common.c > +++ b/crypto/crct10dif_common.c > @@ -32,47 +32,580 @@ > * x^16 + x^15 + x^11 + x^9 + x^8 + x^7 + x^5 + x^4 + x^2 + x + 1 > * gt: 0x8bb7 > */ > -static const __u16 t10_dif_crc_table[256] = { <snip table> > > __u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, size_t len) > { > - unsigned int i; > + const __u8 *i = (const __u8 *)buffer; > + const __u8 *i_end = i + len; > + const __u8 *i_last16 = i + (len / 16 * 16) > > - for (i = 0 ; i < len ; i++) > - crc = (crc << 8) ^ t10_dif_crc_table[((crc >> 8) ^ buffer[i]) & 0xff]; > + for (; i < i_last16; i += 16) { > + crc = t10_dif_crc_table[15][i[0] ^ (__u8)(crc >> 8)] ^ The bswap_16() macro may be faster than crc >> 8 . > + t10_dif_crc_table[14][i[1] ^ (__u8)(crc >> 0)] ^ How is (crc >> 0) different from crc? > + t10_dif_crc_table[13][i[2]] ^ > + t10_dif_crc_table[12][i[3]] ^ > + t10_dif_crc_table[11][i[4]] ^ > + t10_dif_crc_table[10][i[5]] ^ > + t10_dif_crc_table[9][i[6]] ^ > + t10_dif_crc_table[8][i[7]] ^ > + t10_dif_crc_table[7][i[8]] ^ > + t10_dif_crc_table[6][i[9]] ^ > + t10_dif_crc_table[5][i[10]] ^ > + t10_dif_crc_table[4][i[11]] ^ > + t10_dif_crc_table[3][i[12]] ^ > + t10_dif_crc_table[2][i[13]] ^ > + t10_dif_crc_table[1][i[14]] ^ > + t10_dif_crc_table[0][i[15]]; Since n in i[n] is marching from 0 to 15 then all but the first (i.e. i[0]) could be replaced by *(++i) . The first for loop statement would then become: for (; i < i_last16; ++i) { The two dimensional indexing could be flattened to further (ugly) pointer manipulations, perhaps gaining some cycles, at the expense of clarity. If so you could keep some of the two dimensional indexing lines commented for documentation of the intent. Doug Gilbert > + } > + > + for (; i < i_end; i++) > + crc = t10_dif_crc_table[0][*i ^ (__u8)(crc >> 8)] ^ (crc << 8); > > return crc; > } >
On Fri, 2018-08-10 at 16:02 -0400, Nicolas Pitre wrote: > On Fri, 10 Aug 2018, Joe Perches wrote: > > > On Fri, 2018-08-10 at 14:12 -0500, Jeff Lien wrote: > > > This patch provides a performance improvement for the CRC16 calculations done in read/write > > > workloads using the T10 Type 1/2/3 guard field. For example, today with sequential write > > > workloads (one thread/CPU of IO) we consume 100% of the CPU because of the CRC16 computation > > > bottleneck. Today's block devices are considerably faster, but the CRC16 calculation prevents > > > folks from utilizing the throughput of such devices. To speed up this calculation and expose > > > the block device throughput, we slice the old single byte for loop into a 16 byte for loop, > > > with a larger CRC table to match. The result has shown 5x performance improvements on various > > > big endian and little endian systems running the 4.18.0 kernel version. > > > > Thanks. > > > > This seems a sensible tradeoff for the 4k text size increase. > > More like 7.5KB. Would be best if this was configurable so the small > version remained available. Maybe something like: (compiled, untested) --- crypto/Kconfig | 10 + crypto/crct10dif_common.c | 543 +++++++++++++++++++++++++++++++++++++++++++++- 2 files changed, 549 insertions(+), 4 deletions(-) diff --git a/crypto/Kconfig b/crypto/Kconfig index f3e40ac56d93..88d9d17bb18a 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -618,6 +618,16 @@ config CRYPTO_CRCT10DIF a crypto transform. This allows for faster crc t10 diff transforms to be used if they are available. +config CRYPTO_CRCT10DIF_TABLE_SIZE + int "Size of CRCT10DIF crc tables (as a power of 2)" + depends on CRYPTO_CRCT10DIF + range 1 5 + default 1 if EMBEDDED + default 5 + help + Set the table size used by the CRYPTO_CRCT10DIF crc calculation + Larger values use more memory and are faster. + config CRYPTO_CRCT10DIF_PCLMUL tristate "CRCT10DIF PCLMULQDQ hardware acceleration" depends on X86 && 64BIT && CRC_T10DIF diff --git a/crypto/crct10dif_common.c b/crypto/crct10dif_common.c index b2fab366f518..4eb1c50c3688 100644 --- a/crypto/crct10dif_common.c +++ b/crypto/crct10dif_common.c @@ -32,7 +32,8 @@ * x^16 + x^15 + x^11 + x^9 + x^8 + x^7 + x^5 + x^4 + x^2 + x + 1 * gt: 0x8bb7 */ -static const __u16 t10_dif_crc_table[256] = { +static const __u16 t10dif_crc_table[][256] = { + { 0x0000, 0x8BB7, 0x9CD9, 0x176E, 0xB205, 0x39B2, 0x2EDC, 0xA56B, 0xEFBD, 0x640A, 0x7364, 0xF8D3, 0x5DB8, 0xD60F, 0xC161, 0x4AD6, 0x54CD, 0xDF7A, 0xC814, 0x43A3, 0xE6C8, 0x6D7F, 0x7A11, 0xF1A6, @@ -65,14 +66,548 @@ static const __u16 t10_dif_crc_table[256] = { 0xA415, 0x2FA2, 0x38CC, 0xB37B, 0x1610, 0x9DA7, 0x8AC9, 0x017E, 0x1F65, 0x94D2, 0x83BC, 0x080B, 0xAD60, 0x26D7, 0x31B9, 0xBA0E, 0xF0D8, 0x7B6F, 0x6C01, 0xE7B6, 0x42DD, 0xC96A, 0xDE04, 0x55B3 + }, +#if CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE >= 2 + { + 0x0000, 0x7562, 0xEAC4, 0x9FA6, 0x5E3F, 0x2B5D, 0xB4FB, 0xC199, + 0xBC7E, 0xC91C, 0x56BA, 0x23D8, 0xE241, 0x9723, 0x0885, 0x7DE7, + 0xF34B, 0x8629, 0x198F, 0x6CED, 0xAD74, 0xD816, 0x47B0, 0x32D2, + 0x4F35, 0x3A57, 0xA5F1, 0xD093, 0x110A, 0x6468, 0xFBCE, 0x8EAC, + 0x6D21, 0x1843, 0x87E5, 0xF287, 0x331E, 0x467C, 0xD9DA, 0xACB8, + 0xD15F, 0xA43D, 0x3B9B, 0x4EF9, 0x8F60, 0xFA02, 0x65A4, 0x10C6, + 0x9E6A, 0xEB08, 0x74AE, 0x01CC, 0xC055, 0xB537, 0x2A91, 0x5FF3, + 0x2214, 0x5776, 0xC8D0, 0xBDB2, 0x7C2B, 0x0949, 0x96EF, 0xE38D, + 0xDA42, 0xAF20, 0x3086, 0x45E4, 0x847D, 0xF11F, 0x6EB9, 0x1BDB, + 0x663C, 0x135E, 0x8CF8, 0xF99A, 0x3803, 0x4D61, 0xD2C7, 0xA7A5, + 0x2909, 0x5C6B, 0xC3CD, 0xB6AF, 0x7736, 0x0254, 0x9DF2, 0xE890, + 0x9577, 0xE015, 0x7FB3, 0x0AD1, 0xCB48, 0xBE2A, 0x218C, 0x54EE, + 0xB763, 0xC201, 0x5DA7, 0x28C5, 0xE95C, 0x9C3E, 0x0398, 0x76FA, + 0x0B1D, 0x7E7F, 0xE1D9, 0x94BB, 0x5522, 0x2040, 0xBFE6, 0xCA84, + 0x4428, 0x314A, 0xAEEC, 0xDB8E, 0x1A17, 0x6F75, 0xF0D3, 0x85B1, + 0xF856, 0x8D34, 0x1292, 0x67F0, 0xA669, 0xD30B, 0x4CAD, 0x39CF, + 0x3F33, 0x4A51, 0xD5F7, 0xA095, 0x610C, 0x146E, 0x8BC8, 0xFEAA, + 0x834D, 0xF62F, 0x6989, 0x1CEB, 0xDD72, 0xA810, 0x37B6, 0x42D4, + 0xCC78, 0xB91A, 0x26BC, 0x53DE, 0x9247, 0xE725, 0x7883, 0x0DE1, + 0x7006, 0x0564, 0x9AC2, 0xEFA0, 0x2E39, 0x5B5B, 0xC4FD, 0xB19F, + 0x5212, 0x2770, 0xB8D6, 0xCDB4, 0x0C2D, 0x794F, 0xE6E9, 0x938B, + 0xEE6C, 0x9B0E, 0x04A8, 0x71CA, 0xB053, 0xC531, 0x5A97, 0x2FF5, + 0xA159, 0xD43B, 0x4B9D, 0x3EFF, 0xFF66, 0x8A04, 0x15A2, 0x60C0, + 0x1D27, 0x6845, 0xF7E3, 0x8281, 0x4318, 0x367A, 0xA9DC, 0xDCBE, + 0xE571, 0x9013, 0x0FB5, 0x7AD7, 0xBB4E, 0xCE2C, 0x518A, 0x24E8, + 0x590F, 0x2C6D, 0xB3CB, 0xC6A9, 0x0730, 0x7252, 0xEDF4, 0x9896, + 0x163A, 0x6358, 0xFCFE, 0x899C, 0x4805, 0x3D67, 0xA2C1, 0xD7A3, + 0xAA44, 0xDF26, 0x4080, 0x35E2, 0xF47B, 0x8119, 0x1EBF, 0x6BDD, + 0x8850, 0xFD32, 0x6294, 0x17F6, 0xD66F, 0xA30D, 0x3CAB, 0x49C9, + 0x342E, 0x414C, 0xDEEA, 0xAB88, 0x6A11, 0x1F73, 0x80D5, 0xF5B7, + 0x7B1B, 0x0E79, 0x91DF, 0xE4BD, 0x2524, 0x5046, 0xCFE0, 0xBA82, + 0xC765, 0xB207, 0x2DA1, 0x58C3, 0x995A, 0xEC38, 0x739E, 0x06FC + }, +#endif +#if CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE >= 3 + { + 0x0000, 0x7E66, 0xFCCC, 0x82AA, 0x722F, 0x0C49, 0x8EE3, 0xF085, + 0xE45E, 0x9A38, 0x1892, 0x66F4, 0x9671, 0xE817, 0x6ABD, 0x14DB, + 0x430B, 0x3D6D, 0xBFC7, 0xC1A1, 0x3124, 0x4F42, 0xCDE8, 0xB38E, + 0xA755, 0xD933, 0x5B99, 0x25FF, 0xD57A, 0xAB1C, 0x29B6, 0x57D0, + 0x8616, 0xF870, 0x7ADA, 0x04BC, 0xF439, 0x8A5F, 0x08F5, 0x7693, + 0x6248, 0x1C2E, 0x9E84, 0xE0E2, 0x1067, 0x6E01, 0xECAB, 0x92CD, + 0xC51D, 0xBB7B, 0x39D1, 0x47B7, 0xB732, 0xC954, 0x4BFE, 0x3598, + 0x2143, 0x5F25, 0xDD8F, 0xA3E9, 0x536C, 0x2D0A, 0xAFA0, 0xD1C6, + 0x879B, 0xF9FD, 0x7B57, 0x0531, 0xF5B4, 0x8BD2, 0x0978, 0x771E, + 0x63C5, 0x1DA3, 0x9F09, 0xE16F, 0x11EA, 0x6F8C, 0xED26, 0x9340, + 0xC490, 0xBAF6, 0x385C, 0x463A, 0xB6BF, 0xC8D9, 0x4A73, 0x3415, + 0x20CE, 0x5EA8, 0xDC02, 0xA264, 0x52E1, 0x2C87, 0xAE2D, 0xD04B, + 0x018D, 0x7FEB, 0xFD41, 0x8327, 0x73A2, 0x0DC4, 0x8F6E, 0xF108, + 0xE5D3, 0x9BB5, 0x191F, 0x6779, 0x97FC, 0xE99A, 0x6B30, 0x1556, + 0x4286, 0x3CE0, 0xBE4A, 0xC02C, 0x30A9, 0x4ECF, 0xCC65, 0xB203, + 0xA6D8, 0xD8BE, 0x5A14, 0x2472, 0xD4F7, 0xAA91, 0x283B, 0x565D, + 0x8481, 0xFAE7, 0x784D, 0x062B, 0xF6AE, 0x88C8, 0x0A62, 0x7404, + 0x60DF, 0x1EB9, 0x9C13, 0xE275, 0x12F0, 0x6C96, 0xEE3C, 0x905A, + 0xC78A, 0xB9EC, 0x3B46, 0x4520, 0xB5A5, 0xCBC3, 0x4969, 0x370F, + 0x23D4, 0x5DB2, 0xDF18, 0xA17E, 0x51FB, 0x2F9D, 0xAD37, 0xD351, + 0x0297, 0x7CF1, 0xFE5B, 0x803D, 0x70B8, 0x0EDE, 0x8C74, 0xF212, + 0xE6C9, 0x98AF, 0x1A05, 0x6463, 0x94E6, 0xEA80, 0x682A, 0x164C, + 0x419C, 0x3FFA, 0xBD50, 0xC336, 0x33B3, 0x4DD5, 0xCF7F, 0xB119, + 0xA5C2, 0xDBA4, 0x590E, 0x2768, 0xD7ED, 0xA98B, 0x2B21, 0x5547, + 0x031A, 0x7D7C, 0xFFD6, 0x81B0, 0x7135, 0x0F53, 0x8DF9, 0xF39F, + 0xE744, 0x9922, 0x1B88, 0x65EE, 0x956B, 0xEB0D, 0x69A7, 0x17C1, + 0x4011, 0x3E77, 0xBCDD, 0xC2BB, 0x323E, 0x4C58, 0xCEF2, 0xB094, + 0xA44F, 0xDA29, 0x5883, 0x26E5, 0xD660, 0xA806, 0x2AAC, 0x54CA, + 0x850C, 0xFB6A, 0x79C0, 0x07A6, 0xF723, 0x8945, 0x0BEF, 0x7589, + 0x6152, 0x1F34, 0x9D9E, 0xE3F8, 0x137D, 0x6D1B, 0xEFB1, 0x91D7, + 0xC607, 0xB861, 0x3ACB, 0x44AD, 0xB428, 0xCA4E, 0x48E4, 0x3682, + 0x2259, 0x5C3F, 0xDE95, 0xA0F3, 0x5076, 0x2E10, 0xACBA, 0xD2DC + }, + { + 0x0000, 0x82B5, 0x8EDD, 0x0C68, 0x960D, 0x14B8, 0x18D0, 0x9A65, + 0xA7AD, 0x2518, 0x2970, 0xABC5, 0x31A0, 0xB315, 0xBF7D, 0x3DC8, + 0xC4ED, 0x4658, 0x4A30, 0xC885, 0x52E0, 0xD055, 0xDC3D, 0x5E88, + 0x6340, 0xE1F5, 0xED9D, 0x6F28, 0xF54D, 0x77F8, 0x7B90, 0xF925, + 0x026D, 0x80D8, 0x8CB0, 0x0E05, 0x9460, 0x16D5, 0x1ABD, 0x9808, + 0xA5C0, 0x2775, 0x2B1D, 0xA9A8, 0x33CD, 0xB178, 0xBD10, 0x3FA5, + 0xC680, 0x4435, 0x485D, 0xCAE8, 0x508D, 0xD238, 0xDE50, 0x5CE5, + 0x612D, 0xE398, 0xEFF0, 0x6D45, 0xF720, 0x7595, 0x79FD, 0xFB48, + 0x04DA, 0x866F, 0x8A07, 0x08B2, 0x92D7, 0x1062, 0x1C0A, 0x9EBF, + 0xA377, 0x21C2, 0x2DAA, 0xAF1F, 0x357A, 0xB7CF, 0xBBA7, 0x3912, + 0xC037, 0x4282, 0x4EEA, 0xCC5F, 0x563A, 0xD48F, 0xD8E7, 0x5A52, + 0x679A, 0xE52F, 0xE947, 0x6BF2, 0xF197, 0x7322, 0x7F4A, 0xFDFF, + 0x06B7, 0x8402, 0x886A, 0x0ADF, 0x90BA, 0x120F, 0x1E67, 0x9CD2, + 0xA11A, 0x23AF, 0x2FC7, 0xAD72, 0x3717, 0xB5A2, 0xB9CA, 0x3B7F, + 0xC25A, 0x40EF, 0x4C87, 0xCE32, 0x5457, 0xD6E2, 0xDA8A, 0x583F, + 0x65F7, 0xE742, 0xEB2A, 0x699F, 0xF3FA, 0x714F, 0x7D27, 0xFF92, + 0x09B4, 0x8B01, 0x8769, 0x05DC, 0x9FB9, 0x1D0C, 0x1164, 0x93D1, + 0xAE19, 0x2CAC, 0x20C4, 0xA271, 0x3814, 0xBAA1, 0xB6C9, 0x347C, + 0xCD59, 0x4FEC, 0x4384, 0xC131, 0x5B54, 0xD9E1, 0xD589, 0x573C, + 0x6AF4, 0xE841, 0xE429, 0x669C, 0xFCF9, 0x7E4C, 0x7224, 0xF091, + 0x0BD9, 0x896C, 0x8504, 0x07B1, 0x9DD4, 0x1F61, 0x1309, 0x91BC, + 0xAC74, 0x2EC1, 0x22A9, 0xA01C, 0x3A79, 0xB8CC, 0xB4A4, 0x3611, + 0xCF34, 0x4D81, 0x41E9, 0xC35C, 0x5939, 0xDB8C, 0xD7E4, 0x5551, + 0x6899, 0xEA2C, 0xE644, 0x64F1, 0xFE94, 0x7C21, 0x7049, 0xF2FC, + 0x0D6E, 0x8FDB, 0x83B3, 0x0106, 0x9B63, 0x19D6, 0x15BE, 0x970B, + 0xAAC3, 0x2876, 0x241E, 0xA6AB, 0x3CCE, 0xBE7B, 0xB213, 0x30A6, + 0xC983, 0x4B36, 0x475E, 0xC5EB, 0x5F8E, 0xDD3B, 0xD153, 0x53E6, + 0x6E2E, 0xEC9B, 0xE0F3, 0x6246, 0xF823, 0x7A96, 0x76FE, 0xF44B, + 0x0F03, 0x8DB6, 0x81DE, 0x036B, 0x990E, 0x1BBB, 0x17D3, 0x9566, + 0xA8AE, 0x2A1B, 0x2673, 0xA4C6, 0x3EA3, 0xBC16, 0xB07E, 0x32CB, + 0xCBEE, 0x495B, 0x4533, 0xC786, 0x5DE3, 0xDF56, 0xD33E, 0x518B, + 0x6C43, 0xEEF6, 0xE29E, 0x602B, 0xFA4E, 0x78FB, 0x7493, 0xF626 + }, +#endif +#if CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE >= 4 + { + 0x0000, 0x1368, 0x26D0, 0x35B8, 0x4DA0, 0x5EC8, 0x6B70, 0x7818, + 0x9B40, 0x8828, 0xBD90, 0xAEF8, 0xD6E0, 0xC588, 0xF030, 0xE358, + 0xBD37, 0xAE5F, 0x9BE7, 0x888F, 0xF097, 0xE3FF, 0xD647, 0xC52F, + 0x2677, 0x351F, 0x00A7, 0x13CF, 0x6BD7, 0x78BF, 0x4D07, 0x5E6F, + 0xF1D9, 0xE2B1, 0xD709, 0xC461, 0xBC79, 0xAF11, 0x9AA9, 0x89C1, + 0x6A99, 0x79F1, 0x4C49, 0x5F21, 0x2739, 0x3451, 0x01E9, 0x1281, + 0x4CEE, 0x5F86, 0x6A3E, 0x7956, 0x014E, 0x1226, 0x279E, 0x34F6, + 0xD7AE, 0xC4C6, 0xF17E, 0xE216, 0x9A0E, 0x8966, 0xBCDE, 0xAFB6, + 0x6805, 0x7B6D, 0x4ED5, 0x5DBD, 0x25A5, 0x36CD, 0x0375, 0x101D, + 0xF345, 0xE02D, 0xD595, 0xC6FD, 0xBEE5, 0xAD8D, 0x9835, 0x8B5D, + 0xD532, 0xC65A, 0xF3E2, 0xE08A, 0x9892, 0x8BFA, 0xBE42, 0xAD2A, + 0x4E72, 0x5D1A, 0x68A2, 0x7BCA, 0x03D2, 0x10BA, 0x2502, 0x366A, + 0x99DC, 0x8AB4, 0xBF0C, 0xAC64, 0xD47C, 0xC714, 0xF2AC, 0xE1C4, + 0x029C, 0x11F4, 0x244C, 0x3724, 0x4F3C, 0x5C54, 0x69EC, 0x7A84, + 0x24EB, 0x3783, 0x023B, 0x1153, 0x694B, 0x7A23, 0x4F9B, 0x5CF3, + 0xBFAB, 0xACC3, 0x997B, 0x8A13, 0xF20B, 0xE163, 0xD4DB, 0xC7B3, + 0xD00A, 0xC362, 0xF6DA, 0xE5B2, 0x9DAA, 0x8EC2, 0xBB7A, 0xA812, + 0x4B4A, 0x5822, 0x6D9A, 0x7EF2, 0x06EA, 0x1582, 0x203A, 0x3352, + 0x6D3D, 0x7E55, 0x4BED, 0x5885, 0x209D, 0x33F5, 0x064D, 0x1525, + 0xF67D, 0xE515, 0xD0AD, 0xC3C5, 0xBBDD, 0xA8B5, 0x9D0D, 0x8E65, + 0x21D3, 0x32BB, 0x0703, 0x146B, 0x6C73, 0x7F1B, 0x4AA3, 0x59CB, + 0xBA93, 0xA9FB, 0x9C43, 0x8F2B, 0xF733, 0xE45B, 0xD1E3, 0xC28B, + 0x9CE4, 0x8F8C, 0xBA34, 0xA95C, 0xD144, 0xC22C, 0xF794, 0xE4FC, + 0x07A4, 0x14CC, 0x2174, 0x321C, 0x4A04, 0x596C, 0x6CD4, 0x7FBC, + 0xB80F, 0xAB67, 0x9EDF, 0x8DB7, 0xF5AF, 0xE6C7, 0xD37F, 0xC017, + 0x234F, 0x3027, 0x059F, 0x16F7, 0x6EEF, 0x7D87, 0x483F, 0x5B57, + 0x0538, 0x1650, 0x23E8, 0x3080, 0x4898, 0x5BF0, 0x6E48, 0x7D20, + 0x9E78, 0x8D10, 0xB8A8, 0xABC0, 0xD3D8, 0xC0B0, 0xF508, 0xE660, + 0x49D6, 0x5ABE, 0x6F06, 0x7C6E, 0x0476, 0x171E, 0x22A6, 0x31CE, + 0xD296, 0xC1FE, 0xF446, 0xE72E, 0x9F36, 0x8C5E, 0xB9E6, 0xAA8E, + 0xF4E1, 0xE789, 0xD231, 0xC159, 0xB941, 0xAA29, 0x9F91, 0x8CF9, + 0x6FA1, 0x7CC9, 0x4971, 0x5A19, 0x2201, 0x3169, 0x04D1, 0x17B9 + }, + { + 0x0000, 0x2BA3, 0x5746, 0x7CE5, 0xAE8C, 0x852F, 0xF9CA, 0xD269, + 0xD6AF, 0xFD0C, 0x81E9, 0xAA4A, 0x7823, 0x5380, 0x2F65, 0x04C6, + 0x26E9, 0x0D4A, 0x71AF, 0x5A0C, 0x8865, 0xA3C6, 0xDF23, 0xF480, + 0xF046, 0xDBE5, 0xA700, 0x8CA3, 0x5ECA, 0x7569, 0x098C, 0x222F, + 0x4DD2, 0x6671, 0x1A94, 0x3137, 0xE35E, 0xC8FD, 0xB418, 0x9FBB, + 0x9B7D, 0xB0DE, 0xCC3B, 0xE798, 0x35F1, 0x1E52, 0x62B7, 0x4914, + 0x6B3B, 0x4098, 0x3C7D, 0x17DE, 0xC5B7, 0xEE14, 0x92F1, 0xB952, + 0xBD94, 0x9637, 0xEAD2, 0xC171, 0x1318, 0x38BB, 0x445E, 0x6FFD, + 0x9BA4, 0xB007, 0xCCE2, 0xE741, 0x3528, 0x1E8B, 0x626E, 0x49CD, + 0x4D0B, 0x66A8, 0x1A4D, 0x31EE, 0xE387, 0xC824, 0xB4C1, 0x9F62, + 0xBD4D, 0x96EE, 0xEA0B, 0xC1A8, 0x13C1, 0x3862, 0x4487, 0x6F24, + 0x6BE2, 0x4041, 0x3CA4, 0x1707, 0xC56E, 0xEECD, 0x9228, 0xB98B, + 0xD676, 0xFDD5, 0x8130, 0xAA93, 0x78FA, 0x5359, 0x2FBC, 0x041F, + 0x00D9, 0x2B7A, 0x579F, 0x7C3C, 0xAE55, 0x85F6, 0xF913, 0xD2B0, + 0xF09F, 0xDB3C, 0xA7D9, 0x8C7A, 0x5E13, 0x75B0, 0x0955, 0x22F6, + 0x2630, 0x0D93, 0x7176, 0x5AD5, 0x88BC, 0xA31F, 0xDFFA, 0xF459, + 0xBCFF, 0x975C, 0xEBB9, 0xC01A, 0x1273, 0x39D0, 0x4535, 0x6E96, + 0x6A50, 0x41F3, 0x3D16, 0x16B5, 0xC4DC, 0xEF7F, 0x939A, 0xB839, + 0x9A16, 0xB1B5, 0xCD50, 0xE6F3, 0x349A, 0x1F39, 0x63DC, 0x487F, + 0x4CB9, 0x671A, 0x1BFF, 0x305C, 0xE235, 0xC996, 0xB573, 0x9ED0, + 0xF12D, 0xDA8E, 0xA66B, 0x8DC8, 0x5FA1, 0x7402, 0x08E7, 0x2344, + 0x2782, 0x0C21, 0x70C4, 0x5B67, 0x890E, 0xA2AD, 0xDE48, 0xF5EB, + 0xD7C4, 0xFC67, 0x8082, 0xAB21, 0x7948, 0x52EB, 0x2E0E, 0x05AD, + 0x016B, 0x2AC8, 0x562D, 0x7D8E, 0xAFE7, 0x8444, 0xF8A1, 0xD302, + 0x275B, 0x0CF8, 0x701D, 0x5BBE, 0x89D7, 0xA274, 0xDE91, 0xF532, + 0xF1F4, 0xDA57, 0xA6B2, 0x8D11, 0x5F78, 0x74DB, 0x083E, 0x239D, + 0x01B2, 0x2A11, 0x56F4, 0x7D57, 0xAF3E, 0x849D, 0xF878, 0xD3DB, + 0xD71D, 0xFCBE, 0x805B, 0xABF8, 0x7991, 0x5232, 0x2ED7, 0x0574, + 0x6A89, 0x412A, 0x3DCF, 0x166C, 0xC405, 0xEFA6, 0x9343, 0xB8E0, + 0xBC26, 0x9785, 0xEB60, 0xC0C3, 0x12AA, 0x3909, 0x45EC, 0x6E4F, + 0x4C60, 0x67C3, 0x1B26, 0x3085, 0xE2EC, 0xC94F, 0xB5AA, 0x9E09, + 0x9ACF, 0xB16C, 0xCD89, 0xE62A, 0x3443, 0x1FE0, 0x6305, 0x48A6 + }, + { + 0x0000, 0xF249, 0x6F25, 0x9D6C, 0xDE4A, 0x2C03, 0xB16F, 0x4326, + 0x3723, 0xC56A, 0x5806, 0xAA4F, 0xE969, 0x1B20, 0x864C, 0x7405, + 0x6E46, 0x9C0F, 0x0163, 0xF32A, 0xB00C, 0x4245, 0xDF29, 0x2D60, + 0x5965, 0xAB2C, 0x3640, 0xC409, 0x872F, 0x7566, 0xE80A, 0x1A43, + 0xDC8C, 0x2EC5, 0xB3A9, 0x41E0, 0x02C6, 0xF08F, 0x6DE3, 0x9FAA, + 0xEBAF, 0x19E6, 0x848A, 0x76C3, 0x35E5, 0xC7AC, 0x5AC0, 0xA889, + 0xB2CA, 0x4083, 0xDDEF, 0x2FA6, 0x6C80, 0x9EC9, 0x03A5, 0xF1EC, + 0x85E9, 0x77A0, 0xEACC, 0x1885, 0x5BA3, 0xA9EA, 0x3486, 0xC6CF, + 0x32AF, 0xC0E6, 0x5D8A, 0xAFC3, 0xECE5, 0x1EAC, 0x83C0, 0x7189, + 0x058C, 0xF7C5, 0x6AA9, 0x98E0, 0xDBC6, 0x298F, 0xB4E3, 0x46AA, + 0x5CE9, 0xAEA0, 0x33CC, 0xC185, 0x82A3, 0x70EA, 0xED86, 0x1FCF, + 0x6BCA, 0x9983, 0x04EF, 0xF6A6, 0xB580, 0x47C9, 0xDAA5, 0x28EC, + 0xEE23, 0x1C6A, 0x8106, 0x734F, 0x3069, 0xC220, 0x5F4C, 0xAD05, + 0xD900, 0x2B49, 0xB625, 0x446C, 0x074A, 0xF503, 0x686F, 0x9A26, + 0x8065, 0x722C, 0xEF40, 0x1D09, 0x5E2F, 0xAC66, 0x310A, 0xC343, + 0xB746, 0x450F, 0xD863, 0x2A2A, 0x690C, 0x9B45, 0x0629, 0xF460, + 0x655E, 0x9717, 0x0A7B, 0xF832, 0xBB14, 0x495D, 0xD431, 0x2678, + 0x527D, 0xA034, 0x3D58, 0xCF11, 0x8C37, 0x7E7E, 0xE312, 0x115B, + 0x0B18, 0xF951, 0x643D, 0x9674, 0xD552, 0x271B, 0xBA77, 0x483E, + 0x3C3B, 0xCE72, 0x531E, 0xA157, 0xE271, 0x1038, 0x8D54, 0x7F1D, + 0xB9D2, 0x4B9B, 0xD6F7, 0x24BE, 0x6798, 0x95D1, 0x08BD, 0xFAF4, + 0x8EF1, 0x7CB8, 0xE1D4, 0x139D, 0x50BB, 0xA2F2, 0x3F9E, 0xCDD7, + 0xD794, 0x25DD, 0xB8B1, 0x4AF8, 0x09DE, 0xFB97, 0x66FB, 0x94B2, + 0xE0B7, 0x12FE, 0x8F92, 0x7DDB, 0x3EFD, 0xCCB4, 0x51D8, 0xA391, + 0x57F1, 0xA5B8, 0x38D4, 0xCA9D, 0x89BB, 0x7BF2, 0xE69E, 0x14D7, + 0x60D2, 0x929B, 0x0FF7, 0xFDBE, 0xBE98, 0x4CD1, 0xD1BD, 0x23F4, + 0x39B7, 0xCBFE, 0x5692, 0xA4DB, 0xE7FD, 0x15B4, 0x88D8, 0x7A91, + 0x0E94, 0xFCDD, 0x61B1, 0x93F8, 0xD0DE, 0x2297, 0xBFFB, 0x4DB2, + 0x8B7D, 0x7934, 0xE458, 0x1611, 0x5537, 0xA77E, 0x3A12, 0xC85B, + 0xBC5E, 0x4E17, 0xD37B, 0x2132, 0x6214, 0x905D, 0x0D31, 0xFF78, + 0xE53B, 0x1772, 0x8A1E, 0x7857, 0x3B71, 0xC938, 0x5454, 0xA61D, + 0xD218, 0x2051, 0xBD3D, 0x4F74, 0x0C52, 0xFE1B, 0x6377, 0x913E + }, + { + 0x0000, 0xCABC, 0x1ECF, 0xD473, 0x3D9E, 0xF722, 0x2351, 0xE9ED, + 0x7B3C, 0xB180, 0x65F3, 0xAF4F, 0x46A2, 0x8C1E, 0x586D, 0x92D1, + 0xF678, 0x3CC4, 0xE8B7, 0x220B, 0xCBE6, 0x015A, 0xD529, 0x1F95, + 0x8D44, 0x47F8, 0x938B, 0x5937, 0xB0DA, 0x7A66, 0xAE15, 0x64A9, + 0x6747, 0xADFB, 0x7988, 0xB334, 0x5AD9, 0x9065, 0x4416, 0x8EAA, + 0x1C7B, 0xD6C7, 0x02B4, 0xC808, 0x21E5, 0xEB59, 0x3F2A, 0xF596, + 0x913F, 0x5B83, 0x8FF0, 0x454C, 0xACA1, 0x661D, 0xB26E, 0x78D2, + 0xEA03, 0x20BF, 0xF4CC, 0x3E70, 0xD79D, 0x1D21, 0xC952, 0x03EE, + 0xCE8E, 0x0432, 0xD041, 0x1AFD, 0xF310, 0x39AC, 0xEDDF, 0x2763, + 0xB5B2, 0x7F0E, 0xAB7D, 0x61C1, 0x882C, 0x4290, 0x96E3, 0x5C5F, + 0x38F6, 0xF24A, 0x2639, 0xEC85, 0x0568, 0xCFD4, 0x1BA7, 0xD11B, + 0x43CA, 0x8976, 0x5D05, 0x97B9, 0x7E54, 0xB4E8, 0x609B, 0xAA27, + 0xA9C9, 0x6375, 0xB706, 0x7DBA, 0x9457, 0x5EEB, 0x8A98, 0x4024, + 0xD2F5, 0x1849, 0xCC3A, 0x0686, 0xEF6B, 0x25D7, 0xF1A4, 0x3B18, + 0x5FB1, 0x950D, 0x417E, 0x8BC2, 0x622F, 0xA893, 0x7CE0, 0xB65C, + 0x248D, 0xEE31, 0x3A42, 0xF0FE, 0x1913, 0xD3AF, 0x07DC, 0xCD60, + 0x16AB, 0xDC17, 0x0864, 0xC2D8, 0x2B35, 0xE189, 0x35FA, 0xFF46, + 0x6D97, 0xA72B, 0x7358, 0xB9E4, 0x5009, 0x9AB5, 0x4EC6, 0x847A, + 0xE0D3, 0x2A6F, 0xFE1C, 0x34A0, 0xDD4D, 0x17F1, 0xC382, 0x093E, + 0x9BEF, 0x5153, 0x8520, 0x4F9C, 0xA671, 0x6CCD, 0xB8BE, 0x7202, + 0x71EC, 0xBB50, 0x6F23, 0xA59F, 0x4C72, 0x86CE, 0x52BD, 0x9801, + 0x0AD0, 0xC06C, 0x141F, 0xDEA3, 0x374E, 0xFDF2, 0x2981, 0xE33D, + 0x8794, 0x4D28, 0x995B, 0x53E7, 0xBA0A, 0x70B6, 0xA4C5, 0x6E79, + 0xFCA8, 0x3614, 0xE267, 0x28DB, 0xC136, 0x0B8A, 0xDFF9, 0x1545, + 0xD825, 0x1299, 0xC6EA, 0x0C56, 0xE5BB, 0x2F07, 0xFB74, 0x31C8, + 0xA319, 0x69A5, 0xBDD6, 0x776A, 0x9E87, 0x543B, 0x8048, 0x4AF4, + 0x2E5D, 0xE4E1, 0x3092, 0xFA2E, 0x13C3, 0xD97F, 0x0D0C, 0xC7B0, + 0x5561, 0x9FDD, 0x4BAE, 0x8112, 0x68FF, 0xA243, 0x7630, 0xBC8C, + 0xBF62, 0x75DE, 0xA1AD, 0x6B11, 0x82FC, 0x4840, 0x9C33, 0x568F, + 0xC45E, 0x0EE2, 0xDA91, 0x102D, 0xF9C0, 0x337C, 0xE70F, 0x2DB3, + 0x491A, 0x83A6, 0x57D5, 0x9D69, 0x7484, 0xBE38, 0x6A4B, 0xA0F7, + 0x3226, 0xF89A, 0x2CE9, 0xE655, 0x0FB8, 0xC504, 0x1177, 0xDBCB + }, +#endif +#if CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE >= 5 + { + 0x0000, 0x2D56, 0x5AAC, 0x77FA, 0xB558, 0x980E, 0xEFF4, 0xC2A2, + 0xE107, 0xCC51, 0xBBAB, 0x96FD, 0x545F, 0x7909, 0x0EF3, 0x23A5, + 0x49B9, 0x64EF, 0x1315, 0x3E43, 0xFCE1, 0xD1B7, 0xA64D, 0x8B1B, + 0xA8BE, 0x85E8, 0xF212, 0xDF44, 0x1DE6, 0x30B0, 0x474A, 0x6A1C, + 0x9372, 0xBE24, 0xC9DE, 0xE488, 0x262A, 0x0B7C, 0x7C86, 0x51D0, + 0x7275, 0x5F23, 0x28D9, 0x058F, 0xC72D, 0xEA7B, 0x9D81, 0xB0D7, + 0xDACB, 0xF79D, 0x8067, 0xAD31, 0x6F93, 0x42C5, 0x353F, 0x1869, + 0x3BCC, 0x169A, 0x6160, 0x4C36, 0x8E94, 0xA3C2, 0xD438, 0xF96E, + 0xAD53, 0x8005, 0xF7FF, 0xDAA9, 0x180B, 0x355D, 0x42A7, 0x6FF1, + 0x4C54, 0x6102, 0x16F8, 0x3BAE, 0xF90C, 0xD45A, 0xA3A0, 0x8EF6, + 0xE4EA, 0xC9BC, 0xBE46, 0x9310, 0x51B2, 0x7CE4, 0x0B1E, 0x2648, + 0x05ED, 0x28BB, 0x5F41, 0x7217, 0xB0B5, 0x9DE3, 0xEA19, 0xC74F, + 0x3E21, 0x1377, 0x648D, 0x49DB, 0x8B79, 0xA62F, 0xD1D5, 0xFC83, + 0xDF26, 0xF270, 0x858A, 0xA8DC, 0x6A7E, 0x4728, 0x30D2, 0x1D84, + 0x7798, 0x5ACE, 0x2D34, 0x0062, 0xC2C0, 0xEF96, 0x986C, 0xB53A, + 0x969F, 0xBBC9, 0xCC33, 0xE165, 0x23C7, 0x0E91, 0x796B, 0x543D, + 0xD111, 0xFC47, 0x8BBD, 0xA6EB, 0x6449, 0x491F, 0x3EE5, 0x13B3, + 0x3016, 0x1D40, 0x6ABA, 0x47EC, 0x854E, 0xA818, 0xDFE2, 0xF2B4, + 0x98A8, 0xB5FE, 0xC204, 0xEF52, 0x2DF0, 0x00A6, 0x775C, 0x5A0A, + 0x79AF, 0x54F9, 0x2303, 0x0E55, 0xCCF7, 0xE1A1, 0x965B, 0xBB0D, + 0x4263, 0x6F35, 0x18CF, 0x3599, 0xF73B, 0xDA6D, 0xAD97, 0x80C1, + 0xA364, 0x8E32, 0xF9C8, 0xD49E, 0x163C, 0x3B6A, 0x4C90, 0x61C6, + 0x0BDA, 0x268C, 0x5176, 0x7C20, 0xBE82, 0x93D4, 0xE42E, 0xC978, + 0xEADD, 0xC78B, 0xB071, 0x9D27, 0x5F85, 0x72D3, 0x0529, 0x287F, + 0x7C42, 0x5114, 0x26EE, 0x0BB8, 0xC91A, 0xE44C, 0x93B6, 0xBEE0, + 0x9D45, 0xB013, 0xC7E9, 0xEABF, 0x281D, 0x054B, 0x72B1, 0x5FE7, + 0x35FB, 0x18AD, 0x6F57, 0x4201, 0x80A3, 0xADF5, 0xDA0F, 0xF759, + 0xD4FC, 0xF9AA, 0x8E50, 0xA306, 0x61A4, 0x4CF2, 0x3B08, 0x165E, + 0xEF30, 0xC266, 0xB59C, 0x98CA, 0x5A68, 0x773E, 0x00C4, 0x2D92, + 0x0E37, 0x2361, 0x549B, 0x79CD, 0xBB6F, 0x9639, 0xE1C3, 0xCC95, + 0xA689, 0x8BDF, 0xFC25, 0xD173, 0x13D1, 0x3E87, 0x497D, 0x642B, + 0x478E, 0x6AD8, 0x1D22, 0x3074, 0xF2D6, 0xDF80, 0xA87A, 0x852C + }, + { + 0x0000, 0x2995, 0x532A, 0x7ABF, 0xA654, 0x8FC1, 0xF57E, 0xDCEB, + 0xC71F, 0xEE8A, 0x9435, 0xBDA0, 0x614B, 0x48DE, 0x3261, 0x1BF4, + 0x0589, 0x2C1C, 0x56A3, 0x7F36, 0xA3DD, 0x8A48, 0xF0F7, 0xD962, + 0xC296, 0xEB03, 0x91BC, 0xB829, 0x64C2, 0x4D57, 0x37E8, 0x1E7D, + 0x0B12, 0x2287, 0x5838, 0x71AD, 0xAD46, 0x84D3, 0xFE6C, 0xD7F9, + 0xCC0D, 0xE598, 0x9F27, 0xB6B2, 0x6A59, 0x43CC, 0x3973, 0x10E6, + 0x0E9B, 0x270E, 0x5DB1, 0x7424, 0xA8CF, 0x815A, 0xFBE5, 0xD270, + 0xC984, 0xE011, 0x9AAE, 0xB33B, 0x6FD0, 0x4645, 0x3CFA, 0x156F, + 0x1624, 0x3FB1, 0x450E, 0x6C9B, 0xB070, 0x99E5, 0xE35A, 0xCACF, + 0xD13B, 0xF8AE, 0x8211, 0xAB84, 0x776F, 0x5EFA, 0x2445, 0x0DD0, + 0x13AD, 0x3A38, 0x4087, 0x6912, 0xB5F9, 0x9C6C, 0xE6D3, 0xCF46, + 0xD4B2, 0xFD27, 0x8798, 0xAE0D, 0x72E6, 0x5B73, 0x21CC, 0x0859, + 0x1D36, 0x34A3, 0x4E1C, 0x6789, 0xBB62, 0x92F7, 0xE848, 0xC1DD, + 0xDA29, 0xF3BC, 0x8903, 0xA096, 0x7C7D, 0x55E8, 0x2F57, 0x06C2, + 0x18BF, 0x312A, 0x4B95, 0x6200, 0xBEEB, 0x977E, 0xEDC1, 0xC454, + 0xDFA0, 0xF635, 0x8C8A, 0xA51F, 0x79F4, 0x5061, 0x2ADE, 0x034B, + 0x2C48, 0x05DD, 0x7F62, 0x56F7, 0x8A1C, 0xA389, 0xD936, 0xF0A3, + 0xEB57, 0xC2C2, 0xB87D, 0x91E8, 0x4D03, 0x6496, 0x1E29, 0x37BC, + 0x29C1, 0x0054, 0x7AEB, 0x537E, 0x8F95, 0xA600, 0xDCBF, 0xF52A, + 0xEEDE, 0xC74B, 0xBDF4, 0x9461, 0x488A, 0x611F, 0x1BA0, 0x3235, + 0x275A, 0x0ECF, 0x7470, 0x5DE5, 0x810E, 0xA89B, 0xD224, 0xFBB1, + 0xE045, 0xC9D0, 0xB36F, 0x9AFA, 0x4611, 0x6F84, 0x153B, 0x3CAE, + 0x22D3, 0x0B46, 0x71F9, 0x586C, 0x8487, 0xAD12, 0xD7AD, 0xFE38, + 0xE5CC, 0xCC59, 0xB6E6, 0x9F73, 0x4398, 0x6A0D, 0x10B2, 0x3927, + 0x3A6C, 0x13F9, 0x6946, 0x40D3, 0x9C38, 0xB5AD, 0xCF12, 0xE687, + 0xFD73, 0xD4E6, 0xAE59, 0x87CC, 0x5B27, 0x72B2, 0x080D, 0x2198, + 0x3FE5, 0x1670, 0x6CCF, 0x455A, 0x99B1, 0xB024, 0xCA9B, 0xE30E, + 0xF8FA, 0xD16F, 0xABD0, 0x8245, 0x5EAE, 0x773B, 0x0D84, 0x2411, + 0x317E, 0x18EB, 0x6254, 0x4BC1, 0x972A, 0xBEBF, 0xC400, 0xED95, + 0xF661, 0xDFF4, 0xA54B, 0x8CDE, 0x5035, 0x79A0, 0x031F, 0x2A8A, + 0x34F7, 0x1D62, 0x67DD, 0x4E48, 0x92A3, 0xBB36, 0xC189, 0xE81C, + 0xF3E8, 0xDA7D, 0xA0C2, 0x8957, 0x55BC, 0x7C29, 0x0696, 0x2F03 + }, + { + 0x0000, 0x5890, 0xB120, 0xE9B0, 0xE9F7, 0xB167, 0x58D7, 0x0047, + 0x5859, 0x00C9, 0xE979, 0xB1E9, 0xB1AE, 0xE93E, 0x008E, 0x581E, + 0xB0B2, 0xE822, 0x0192, 0x5902, 0x5945, 0x01D5, 0xE865, 0xB0F5, + 0xE8EB, 0xB07B, 0x59CB, 0x015B, 0x011C, 0x598C, 0xB03C, 0xE8AC, + 0xEAD3, 0xB243, 0x5BF3, 0x0363, 0x0324, 0x5BB4, 0xB204, 0xEA94, + 0xB28A, 0xEA1A, 0x03AA, 0x5B3A, 0x5B7D, 0x03ED, 0xEA5D, 0xB2CD, + 0x5A61, 0x02F1, 0xEB41, 0xB3D1, 0xB396, 0xEB06, 0x02B6, 0x5A26, + 0x0238, 0x5AA8, 0xB318, 0xEB88, 0xEBCF, 0xB35F, 0x5AEF, 0x027F, + 0x5E11, 0x0681, 0xEF31, 0xB7A1, 0xB7E6, 0xEF76, 0x06C6, 0x5E56, + 0x0648, 0x5ED8, 0xB768, 0xEFF8, 0xEFBF, 0xB72F, 0x5E9F, 0x060F, + 0xEEA3, 0xB633, 0x5F83, 0x0713, 0x0754, 0x5FC4, 0xB674, 0xEEE4, + 0xB6FA, 0xEE6A, 0x07DA, 0x5F4A, 0x5F0D, 0x079D, 0xEE2D, 0xB6BD, + 0xB4C2, 0xEC52, 0x05E2, 0x5D72, 0x5D35, 0x05A5, 0xEC15, 0xB485, + 0xEC9B, 0xB40B, 0x5DBB, 0x052B, 0x056C, 0x5DFC, 0xB44C, 0xECDC, + 0x0470, 0x5CE0, 0xB550, 0xEDC0, 0xED87, 0xB517, 0x5CA7, 0x0437, + 0x5C29, 0x04B9, 0xED09, 0xB599, 0xB5DE, 0xED4E, 0x04FE, 0x5C6E, + 0xBC22, 0xE4B2, 0x0D02, 0x5592, 0x55D5, 0x0D45, 0xE4F5, 0xBC65, + 0xE47B, 0xBCEB, 0x555B, 0x0DCB, 0x0D8C, 0x551C, 0xBCAC, 0xE43C, + 0x0C90, 0x5400, 0xBDB0, 0xE520, 0xE567, 0xBDF7, 0x5447, 0x0CD7, + 0x54C9, 0x0C59, 0xE5E9, 0xBD79, 0xBD3E, 0xE5AE, 0x0C1E, 0x548E, + 0x56F1, 0x0E61, 0xE7D1, 0xBF41, 0xBF06, 0xE796, 0x0E26, 0x56B6, + 0x0EA8, 0x5638, 0xBF88, 0xE718, 0xE75F, 0xBFCF, 0x567F, 0x0EEF, + 0xE643, 0xBED3, 0x5763, 0x0FF3, 0x0FB4, 0x5724, 0xBE94, 0xE604, + 0xBE1A, 0xE68A, 0x0F3A, 0x57AA, 0x57ED, 0x0F7D, 0xE6CD, 0xBE5D, + 0xE233, 0xBAA3, 0x5313, 0x0B83, 0x0BC4, 0x5354, 0xBAE4, 0xE274, + 0xBA6A, 0xE2FA, 0x0B4A, 0x53DA, 0x539D, 0x0B0D, 0xE2BD, 0xBA2D, + 0x5281, 0x0A11, 0xE3A1, 0xBB31, 0xBB76, 0xE3E6, 0x0A56, 0x52C6, + 0x0AD8, 0x5248, 0xBBF8, 0xE368, 0xE32F, 0xBBBF, 0x520F, 0x0A9F, + 0x08E0, 0x5070, 0xB9C0, 0xE150, 0xE117, 0xB987, 0x5037, 0x08A7, + 0x50B9, 0x0829, 0xE199, 0xB909, 0xB94E, 0xE1DE, 0x086E, 0x50FE, + 0xB852, 0xE0C2, 0x0972, 0x51E2, 0x51A5, 0x0935, 0xE085, 0xB815, + 0xE00B, 0xB89B, 0x512B, 0x09BB, 0x09FC, 0x516C, 0xB8DC, 0xE04C + }, + { + 0x0000, 0xF3F3, 0x6C51, 0x9FA2, 0xD8A2, 0x2B51, 0xB4F3, 0x4700, + 0x3AF3, 0xC900, 0x56A2, 0xA551, 0xE251, 0x11A2, 0x8E00, 0x7DF3, + 0x75E6, 0x8615, 0x19B7, 0xEA44, 0xAD44, 0x5EB7, 0xC115, 0x32E6, + 0x4F15, 0xBCE6, 0x2344, 0xD0B7, 0x97B7, 0x6444, 0xFBE6, 0x0815, + 0xEBCC, 0x183F, 0x879D, 0x746E, 0x336E, 0xC09D, 0x5F3F, 0xACCC, + 0xD13F, 0x22CC, 0xBD6E, 0x4E9D, 0x099D, 0xFA6E, 0x65CC, 0x963F, + 0x9E2A, 0x6DD9, 0xF27B, 0x0188, 0x4688, 0xB57B, 0x2AD9, 0xD92A, + 0xA4D9, 0x572A, 0xC888, 0x3B7B, 0x7C7B, 0x8F88, 0x102A, 0xE3D9, + 0x5C2F, 0xAFDC, 0x307E, 0xC38D, 0x848D, 0x777E, 0xE8DC, 0x1B2F, + 0x66DC, 0x952F, 0x0A8D, 0xF97E, 0xBE7E, 0x4D8D, 0xD22F, 0x21DC, + 0x29C9, 0xDA3A, 0x4598, 0xB66B, 0xF16B, 0x0298, 0x9D3A, 0x6EC9, + 0x133A, 0xE0C9, 0x7F6B, 0x8C98, 0xCB98, 0x386B, 0xA7C9, 0x543A, + 0xB7E3, 0x4410, 0xDBB2, 0x2841, 0x6F41, 0x9CB2, 0x0310, 0xF0E3, + 0x8D10, 0x7EE3, 0xE141, 0x12B2, 0x55B2, 0xA641, 0x39E3, 0xCA10, + 0xC205, 0x31F6, 0xAE54, 0x5DA7, 0x1AA7, 0xE954, 0x76F6, 0x8505, + 0xF8F6, 0x0B05, 0x94A7, 0x6754, 0x2054, 0xD3A7, 0x4C05, 0xBFF6, + 0xB85E, 0x4BAD, 0xD40F, 0x27FC, 0x60FC, 0x930F, 0x0CAD, 0xFF5E, + 0x82AD, 0x715E, 0xEEFC, 0x1D0F, 0x5A0F, 0xA9FC, 0x365E, 0xC5AD, + 0xCDB8, 0x3E4B, 0xA1E9, 0x521A, 0x151A, 0xE6E9, 0x794B, 0x8AB8, + 0xF74B, 0x04B8, 0x9B1A, 0x68E9, 0x2FE9, 0xDC1A, 0x43B8, 0xB04B, + 0x5392, 0xA061, 0x3FC3, 0xCC30, 0x8B30, 0x78C3, 0xE761, 0x1492, + 0x6961, 0x9A92, 0x0530, 0xF6C3, 0xB1C3, 0x4230, 0xDD92, 0x2E61, + 0x2674, 0xD587, 0x4A25, 0xB9D6, 0xFED6, 0x0D25, 0x9287, 0x6174, + 0x1C87, 0xEF74, 0x70D6, 0x8325, 0xC425, 0x37D6, 0xA874, 0x5B87, + 0xE471, 0x1782, 0x8820, 0x7BD3, 0x3CD3, 0xCF20, 0x5082, 0xA371, + 0xDE82, 0x2D71, 0xB2D3, 0x4120, 0x0620, 0xF5D3, 0x6A71, 0x9982, + 0x9197, 0x6264, 0xFDC6, 0x0E35, 0x4935, 0xBAC6, 0x2564, 0xD697, + 0xAB64, 0x5897, 0xC735, 0x34C6, 0x73C6, 0x8035, 0x1F97, 0xEC64, + 0x0FBD, 0xFC4E, 0x63EC, 0x901F, 0xD71F, 0x24EC, 0xBB4E, 0x48BD, + 0x354E, 0xC6BD, 0x591F, 0xAAEC, 0xEDEC, 0x1E1F, 0x81BD, 0x724E, + 0x7A5B, 0x89A8, 0x160A, 0xE5F9, 0xA2F9, 0x510A, 0xCEA8, 0x3D5B, + 0x40A8, 0xB35B, 0x2CF9, 0xDF0A, 0x980A, 0x6BF9, 0xF45B, 0x07A8 + }, + { + 0x0000, 0xFB0B, 0x7DA1, 0x86AA, 0xFB42, 0x0049, 0x86E3, 0x7DE8, + 0x7D33, 0x8638, 0x0092, 0xFB99, 0x8671, 0x7D7A, 0xFBD0, 0x00DB, + 0xFA66, 0x016D, 0x87C7, 0x7CCC, 0x0124, 0xFA2F, 0x7C85, 0x878E, + 0x8755, 0x7C5E, 0xFAF4, 0x01FF, 0x7C17, 0x871C, 0x01B6, 0xFABD, + 0x7F7B, 0x8470, 0x02DA, 0xF9D1, 0x8439, 0x7F32, 0xF998, 0x0293, + 0x0248, 0xF943, 0x7FE9, 0x84E2, 0xF90A, 0x0201, 0x84AB, 0x7FA0, + 0x851D, 0x7E16, 0xF8BC, 0x03B7, 0x7E5F, 0x8554, 0x03FE, 0xF8F5, + 0xF82E, 0x0325, 0x858F, 0x7E84, 0x036C, 0xF867, 0x7ECD, 0x85C6, + 0xFEF6, 0x05FD, 0x8357, 0x785C, 0x05B4, 0xFEBF, 0x7815, 0x831E, + 0x83C5, 0x78CE, 0xFE64, 0x056F, 0x7887, 0x838C, 0x0526, 0xFE2D, + 0x0490, 0xFF9B, 0x7931, 0x823A, 0xFFD2, 0x04D9, 0x8273, 0x7978, + 0x79A3, 0x82A8, 0x0402, 0xFF09, 0x82E1, 0x79EA, 0xFF40, 0x044B, + 0x818D, 0x7A86, 0xFC2C, 0x0727, 0x7ACF, 0x81C4, 0x076E, 0xFC65, + 0xFCBE, 0x07B5, 0x811F, 0x7A14, 0x07FC, 0xFCF7, 0x7A5D, 0x8156, + 0x7BEB, 0x80E0, 0x064A, 0xFD41, 0x80A9, 0x7BA2, 0xFD08, 0x0603, + 0x06D8, 0xFDD3, 0x7B79, 0x8072, 0xFD9A, 0x0691, 0x803B, 0x7B30, + 0x765B, 0x8D50, 0x0BFA, 0xF0F1, 0x8D19, 0x7612, 0xF0B8, 0x0BB3, + 0x0B68, 0xF063, 0x76C9, 0x8DC2, 0xF02A, 0x0B21, 0x8D8B, 0x7680, + 0x8C3D, 0x7736, 0xF19C, 0x0A97, 0x777F, 0x8C74, 0x0ADE, 0xF1D5, + 0xF10E, 0x0A05, 0x8CAF, 0x77A4, 0x0A4C, 0xF147, 0x77ED, 0x8CE6, + 0x0920, 0xF22B, 0x7481, 0x8F8A, 0xF262, 0x0969, 0x8FC3, 0x74C8, + 0x7413, 0x8F18, 0x09B2, 0xF2B9, 0x8F51, 0x745A, 0xF2F0, 0x09FB, + 0xF346, 0x084D, 0x8EE7, 0x75EC, 0x0804, 0xF30F, 0x75A5, 0x8EAE, + 0x8E75, 0x757E, 0xF3D4, 0x08DF, 0x7537, 0x8E3C, 0x0896, 0xF39D, + 0x88AD, 0x73A6, 0xF50C, 0x0E07, 0x73EF, 0x88E4, 0x0E4E, 0xF545, + 0xF59E, 0x0E95, 0x883F, 0x7334, 0x0EDC, 0xF5D7, 0x737D, 0x8876, + 0x72CB, 0x89C0, 0x0F6A, 0xF461, 0x8989, 0x7282, 0xF428, 0x0F23, + 0x0FF8, 0xF4F3, 0x7259, 0x8952, 0xF4BA, 0x0FB1, 0x891B, 0x7210, + 0xF7D6, 0x0CDD, 0x8A77, 0x717C, 0x0C94, 0xF79F, 0x7135, 0x8A3E, + 0x8AE5, 0x71EE, 0xF744, 0x0C4F, 0x71A7, 0x8AAC, 0x0C06, 0xF70D, + 0x0DB0, 0xF6BB, 0x7011, 0x8B1A, 0xF6F2, 0x0DF9, 0x8B53, 0x7058, + 0x7083, 0x8B88, 0x0D22, 0xF629, 0x8BC1, 0x70CA, 0xF660, 0x0D6B + }, + { + 0x0000, 0xECB6, 0x52DB, 0xBE6D, 0xA5B6, 0x4900, 0xF76D, 0x1BDB, + 0xC0DB, 0x2C6D, 0x9200, 0x7EB6, 0x656D, 0x89DB, 0x37B6, 0xDB00, + 0x0A01, 0xE6B7, 0x58DA, 0xB46C, 0xAFB7, 0x4301, 0xFD6C, 0x11DA, + 0xCADA, 0x266C, 0x9801, 0x74B7, 0x6F6C, 0x83DA, 0x3DB7, 0xD101, + 0x1402, 0xF8B4, 0x46D9, 0xAA6F, 0xB1B4, 0x5D02, 0xE36F, 0x0FD9, + 0xD4D9, 0x386F, 0x8602, 0x6AB4, 0x716F, 0x9DD9, 0x23B4, 0xCF02, + 0x1E03, 0xF2B5, 0x4CD8, 0xA06E, 0xBBB5, 0x5703, 0xE96E, 0x05D8, + 0xDED8, 0x326E, 0x8C03, 0x60B5, 0x7B6E, 0x97D8, 0x29B5, 0xC503, + 0x2804, 0xC4B2, 0x7ADF, 0x9669, 0x8DB2, 0x6104, 0xDF69, 0x33DF, + 0xE8DF, 0x0469, 0xBA04, 0x56B2, 0x4D69, 0xA1DF, 0x1FB2, 0xF304, + 0x2205, 0xCEB3, 0x70DE, 0x9C68, 0x87B3, 0x6B05, 0xD568, 0x39DE, + 0xE2DE, 0x0E68, 0xB005, 0x5CB3, 0x4768, 0xABDE, 0x15B3, 0xF905, + 0x3C06, 0xD0B0, 0x6EDD, 0x826B, 0x99B0, 0x7506, 0xCB6B, 0x27DD, + 0xFCDD, 0x106B, 0xAE06, 0x42B0, 0x596B, 0xB5DD, 0x0BB0, 0xE706, + 0x3607, 0xDAB1, 0x64DC, 0x886A, 0x93B1, 0x7F07, 0xC16A, 0x2DDC, + 0xF6DC, 0x1A6A, 0xA407, 0x48B1, 0x536A, 0xBFDC, 0x01B1, 0xED07, + 0x5008, 0xBCBE, 0x02D3, 0xEE65, 0xF5BE, 0x1908, 0xA765, 0x4BD3, + 0x90D3, 0x7C65, 0xC208, 0x2EBE, 0x3565, 0xD9D3, 0x67BE, 0x8B08, + 0x5A09, 0xB6BF, 0x08D2, 0xE464, 0xFFBF, 0x1309, 0xAD64, 0x41D2, + 0x9AD2, 0x7664, 0xC809, 0x24BF, 0x3F64, 0xD3D2, 0x6DBF, 0x8109, + 0x440A, 0xA8BC, 0x16D1, 0xFA67, 0xE1BC, 0x0D0A, 0xB367, 0x5FD1, + 0x84D1, 0x6867, 0xD60A, 0x3ABC, 0x2167, 0xCDD1, 0x73BC, 0x9F0A, + 0x4E0B, 0xA2BD, 0x1CD0, 0xF066, 0xEBBD, 0x070B, 0xB966, 0x55D0, + 0x8ED0, 0x6266, 0xDC0B, 0x30BD, 0x2B66, 0xC7D0, 0x79BD, 0x950B, + 0x780C, 0x94BA, 0x2AD7, 0xC661, 0xDDBA, 0x310C, 0x8F61, 0x63D7, + 0xB8D7, 0x5461, 0xEA0C, 0x06BA, 0x1D61, 0xF1D7, 0x4FBA, 0xA30C, + 0x720D, 0x9EBB, 0x20D6, 0xCC60, 0xD7BB, 0x3B0D, 0x8560, 0x69D6, + 0xB2D6, 0x5E60, 0xE00D, 0x0CBB, 0x1760, 0xFBD6, 0x45BB, 0xA90D, + 0x6C0E, 0x80B8, 0x3ED5, 0xD263, 0xC9B8, 0x250E, 0x9B63, 0x77D5, + 0xACD5, 0x4063, 0xFE0E, 0x12B8, 0x0963, 0xE5D5, 0x5BB8, 0xB70E, + 0x660F, 0x8AB9, 0x34D4, 0xD862, 0xC3B9, 0x2F0F, 0x9162, 0x7DD4, + 0xA6D4, 0x4A62, 0xF40F, 0x18B9, 0x0362, 0xEFD4, 0x51B9, 0xBD0F + }, + { + 0x0000, 0xA010, 0xCB97, 0x6B87, 0x1C99, 0xBC89, 0xD70E, 0x771E, + 0x3932, 0x9922, 0xF2A5, 0x52B5, 0x25AB, 0x85BB, 0xEE3C, 0x4E2C, + 0x7264, 0xD274, 0xB9F3, 0x19E3, 0x6EFD, 0xCEED, 0xA56A, 0x057A, + 0x4B56, 0xEB46, 0x80C1, 0x20D1, 0x57CF, 0xF7DF, 0x9C58, 0x3C48, + 0xE4C8, 0x44D8, 0x2F5F, 0x8F4F, 0xF851, 0x5841, 0x33C6, 0x93D6, + 0xDDFA, 0x7DEA, 0x166D, 0xB67D, 0xC163, 0x6173, 0x0AF4, 0xAAE4, + 0x96AC, 0x36BC, 0x5D3B, 0xFD2B, 0x8A35, 0x2A25, 0x41A2, 0xE1B2, + 0xAF9E, 0x0F8E, 0x6409, 0xC419, 0xB307, 0x1317, 0x7890, 0xD880, + 0x4227, 0xE237, 0x89B0, 0x29A0, 0x5EBE, 0xFEAE, 0x9529, 0x3539, + 0x7B15, 0xDB05, 0xB082, 0x1092, 0x678C, 0xC79C, 0xAC1B, 0x0C0B, + 0x3043, 0x9053, 0xFBD4, 0x5BC4, 0x2CDA, 0x8CCA, 0xE74D, 0x475D, + 0x0971, 0xA961, 0xC2E6, 0x62F6, 0x15E8, 0xB5F8, 0xDE7F, 0x7E6F, + 0xA6EF, 0x06FF, 0x6D78, 0xCD68, 0xBA76, 0x1A66, 0x71E1, 0xD1F1, + 0x9FDD, 0x3FCD, 0x544A, 0xF45A, 0x8344, 0x2354, 0x48D3, 0xE8C3, + 0xD48B, 0x749B, 0x1F1C, 0xBF0C, 0xC812, 0x6802, 0x0385, 0xA395, + 0xEDB9, 0x4DA9, 0x262E, 0x863E, 0xF120, 0x5130, 0x3AB7, 0x9AA7, + 0x844E, 0x245E, 0x4FD9, 0xEFC9, 0x98D7, 0x38C7, 0x5340, 0xF350, + 0xBD7C, 0x1D6C, 0x76EB, 0xD6FB, 0xA1E5, 0x01F5, 0x6A72, 0xCA62, + 0xF62A, 0x563A, 0x3DBD, 0x9DAD, 0xEAB3, 0x4AA3, 0x2124, 0x8134, + 0xCF18, 0x6F08, 0x048F, 0xA49F, 0xD381, 0x7391, 0x1816, 0xB806, + 0x6086, 0xC096, 0xAB11, 0x0B01, 0x7C1F, 0xDC0F, 0xB788, 0x1798, + 0x59B4, 0xF9A4, 0x9223, 0x3233, 0x452D, 0xE53D, 0x8EBA, 0x2EAA, + 0x12E2, 0xB2F2, 0xD975, 0x7965, 0x0E7B, 0xAE6B, 0xC5EC, 0x65FC, + 0x2BD0, 0x8BC0, 0xE047, 0x4057, 0x3749, 0x9759, 0xFCDE, 0x5CCE, + 0xC669, 0x6679, 0x0DFE, 0xADEE, 0xDAF0, 0x7AE0, 0x1167, 0xB177, + 0xFF5B, 0x5F4B, 0x34CC, 0x94DC, 0xE3C2, 0x43D2, 0x2855, 0x8845, + 0xB40D, 0x141D, 0x7F9A, 0xDF8A, 0xA894, 0x0884, 0x6303, 0xC313, + 0x8D3F, 0x2D2F, 0x46A8, 0xE6B8, 0x91A6, 0x31B6, 0x5A31, 0xFA21, + 0x22A1, 0x82B1, 0xE936, 0x4926, 0x3E38, 0x9E28, 0xF5AF, 0x55BF, + 0x1B93, 0xBB83, 0xD004, 0x7014, 0x070A, 0xA71A, 0xCC9D, 0x6C8D, + 0x50C5, 0xF0D5, 0x9B52, 0x3B42, 0x4C5C, 0xEC4C, 0x87CB, 0x27DB, + 0x69F7, 0xC9E7, 0xA260, 0x0270, 0x756E, 0xD57E, 0xBEF9, 0x1EE9 + }, + { + 0x0000, 0x832B, 0x8DE1, 0x0ECA, 0x9075, 0x135E, 0x1D94, 0x9EBF, + 0xAB5D, 0x2876, 0x26BC, 0xA597, 0x3B28, 0xB803, 0xB6C9, 0x35E2, + 0xDD0D, 0x5E26, 0x50EC, 0xD3C7, 0x4D78, 0xCE53, 0xC099, 0x43B2, + 0x7650, 0xF57B, 0xFBB1, 0x789A, 0xE625, 0x650E, 0x6BC4, 0xE8EF, + 0x31AD, 0xB286, 0xBC4C, 0x3F67, 0xA1D8, 0x22F3, 0x2C39, 0xAF12, + 0x9AF0, 0x19DB, 0x1711, 0x943A, 0x0A85, 0x89AE, 0x8764, 0x044F, + 0xECA0, 0x6F8B, 0x6141, 0xE26A, 0x7CD5, 0xFFFE, 0xF134, 0x721F, + 0x47FD, 0xC4D6, 0xCA1C, 0x4937, 0xD788, 0x54A3, 0x5A69, 0xD942, + 0x635A, 0xE071, 0xEEBB, 0x6D90, 0xF32F, 0x7004, 0x7ECE, 0xFDE5, + 0xC807, 0x4B2C, 0x45E6, 0xC6CD, 0x5872, 0xDB59, 0xD593, 0x56B8, + 0xBE57, 0x3D7C, 0x33B6, 0xB09D, 0x2E22, 0xAD09, 0xA3C3, 0x20E8, + 0x150A, 0x9621, 0x98EB, 0x1BC0, 0x857F, 0x0654, 0x089E, 0x8BB5, + 0x52F7, 0xD1DC, 0xDF16, 0x5C3D, 0xC282, 0x41A9, 0x4F63, 0xCC48, + 0xF9AA, 0x7A81, 0x744B, 0xF760, 0x69DF, 0xEAF4, 0xE43E, 0x6715, + 0x8FFA, 0x0CD1, 0x021B, 0x8130, 0x1F8F, 0x9CA4, 0x926E, 0x1145, + 0x24A7, 0xA78C, 0xA946, 0x2A6D, 0xB4D2, 0x37F9, 0x3933, 0xBA18, + 0xC6B4, 0x459F, 0x4B55, 0xC87E, 0x56C1, 0xD5EA, 0xDB20, 0x580B, + 0x6DE9, 0xEEC2, 0xE008, 0x6323, 0xFD9C, 0x7EB7, 0x707D, 0xF356, + 0x1BB9, 0x9892, 0x9658, 0x1573, 0x8BCC, 0x08E7, 0x062D, 0x8506, + 0xB0E4, 0x33CF, 0x3D05, 0xBE2E, 0x2091, 0xA3BA, 0xAD70, 0x2E5B, + 0xF719, 0x7432, 0x7AF8, 0xF9D3, 0x676C, 0xE447, 0xEA8D, 0x69A6, + 0x5C44, 0xDF6F, 0xD1A5, 0x528E, 0xCC31, 0x4F1A, 0x41D0, 0xC2FB, + 0x2A14, 0xA93F, 0xA7F5, 0x24DE, 0xBA61, 0x394A, 0x3780, 0xB4AB, + 0x8149, 0x0262, 0x0CA8, 0x8F83, 0x113C, 0x9217, 0x9CDD, 0x1FF6, + 0xA5EE, 0x26C5, 0x280F, 0xAB24, 0x359B, 0xB6B0, 0xB87A, 0x3B51, + 0x0EB3, 0x8D98, 0x8352, 0x0079, 0x9EC6, 0x1DED, 0x1327, 0x900C, + 0x78E3, 0xFBC8, 0xF502, 0x7629, 0xE896, 0x6BBD, 0x6577, 0xE65C, + 0xD3BE, 0x5095, 0x5E5F, 0xDD74, 0x43CB, 0xC0E0, 0xCE2A, 0x4D01, + 0x9443, 0x1768, 0x19A2, 0x9A89, 0x0436, 0x871D, 0x89D7, 0x0AFC, + 0x3F1E, 0xBC35, 0xB2FF, 0x31D4, 0xAF6B, 0x2C40, 0x228A, 0xA1A1, + 0x494E, 0xCA65, 0xC4AF, 0x4784, 0xD93B, 0x5A10, 0x54DA, 0xD7F1, + 0xE213, 0x6138, 0x6FF2, 0xECD9, 0x7266, 0xF14D, 0xFF87, 0x7CAC + }, +#endif }; __u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, size_t len) { - unsigned int i; + const u8 *ptr = (const __u8 *)buffer; + const u8 *ptr_end = ptr + len; +#if CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE > 1 + size_t tablesize = 1 << (CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE - 1); + const u8 *ptr_last = ptr + (len / tablesize * tablesize); - for (i = 0 ; i < len ; i++) - crc = (crc << 8) ^ t10_dif_crc_table[((crc >> 8) ^ buffer[i]) & 0xff]; + while (ptr < ptr_last) { + size_t index = tablesize; + __u16 t; + + t = t10dif_crc_table[--index][*ptr++ ^ (u8)(crc >> 8)]; + t ^= t10dif_crc_table[--index][*ptr++ ^ (u8)crc]; + crc = t; + while (index > 0) + crc ^= t10dif_crc_table[--index][*ptr++]; + } +#endif + while (ptr < ptr_end) + crc = t10dif_crc_table[0][*ptr++ ^ (u8)(crc >> 8)] ^ (crc << 8); return crc; }
On Fri, 10 Aug 2018, Joe Perches wrote: > On Fri, 2018-08-10 at 16:02 -0400, Nicolas Pitre wrote: > > On Fri, 10 Aug 2018, Joe Perches wrote: > > > > > On Fri, 2018-08-10 at 14:12 -0500, Jeff Lien wrote: > > > > This patch provides a performance improvement for the CRC16 calculations done in read/write > > > > workloads using the T10 Type 1/2/3 guard field. For example, today with sequential write > > > > workloads (one thread/CPU of IO) we consume 100% of the CPU because of the CRC16 computation > > > > bottleneck. Today's block devices are considerably faster, but the CRC16 calculation prevents > > > > folks from utilizing the throughput of such devices. To speed up this calculation and expose > > > > the block device throughput, we slice the old single byte for loop into a 16 byte for loop, > > > > with a larger CRC table to match. The result has shown 5x performance improvements on various > > > > big endian and little endian systems running the 4.18.0 kernel version. > > > > > > Thanks. > > > > > > This seems a sensible tradeoff for the 4k text size increase. > > > > More like 7.5KB. Would be best if this was configurable so the small > > version remained available. > > Maybe something like: (compiled, untested) > --- > crypto/Kconfig | 10 + > crypto/crct10dif_common.c | 543 +++++++++++++++++++++++++++++++++++++++++++++- > 2 files changed, 549 insertions(+), 4 deletions(-) > > diff --git a/crypto/Kconfig b/crypto/Kconfig > index f3e40ac56d93..88d9d17bb18a 100644 > --- a/crypto/Kconfig > +++ b/crypto/Kconfig > @@ -618,6 +618,16 @@ config CRYPTO_CRCT10DIF > a crypto transform. This allows for faster crc t10 diff > transforms to be used if they are available. > > +config CRYPTO_CRCT10DIF_TABLE_SIZE > + int "Size of CRCT10DIF crc tables (as a power of 2)" > + depends on CRYPTO_CRCT10DIF > + range 1 5 > + default 1 if EMBEDDED > + default 5 You could even make the prompt depend on EXPERT. I like it! Acked-by: Nicolas Pitre <nico@linaro.org> Nicolas
On 2018-08-10 08:11 PM, Joe Perches wrote: > On Fri, 2018-08-10 at 16:02 -0400, Nicolas Pitre wrote: >> On Fri, 10 Aug 2018, Joe Perches wrote: >> >>> On Fri, 2018-08-10 at 14:12 -0500, Jeff Lien wrote: >>>> This patch provides a performance improvement for the CRC16 calculations done in read/write >>>> workloads using the T10 Type 1/2/3 guard field. For example, today with sequential write >>>> workloads (one thread/CPU of IO) we consume 100% of the CPU because of the CRC16 computation >>>> bottleneck. Today's block devices are considerably faster, but the CRC16 calculation prevents >>>> folks from utilizing the throughput of such devices. To speed up this calculation and expose >>>> the block device throughput, we slice the old single byte for loop into a 16 byte for loop, >>>> with a larger CRC table to match. The result has shown 5x performance improvements on various >>>> big endian and little endian systems running the 4.18.0 kernel version. >>> >>> Thanks. >>> >>> This seems a sensible tradeoff for the 4k text size increase. >> >> More like 7.5KB. Would be best if this was configurable so the small >> version remained available. > > Maybe something like: (compiled, untested) > --- > crypto/Kconfig | 10 + > crypto/crct10dif_common.c | 543 +++++++++++++++++++++++++++++++++++++++++++++- > 2 files changed, 549 insertions(+), 4 deletions(-) > > diff --git a/crypto/Kconfig b/crypto/Kconfig > index f3e40ac56d93..88d9d17bb18a 100644 > --- a/crypto/Kconfig > +++ b/crypto/Kconfig > @@ -618,6 +618,16 @@ config CRYPTO_CRCT10DIF > a crypto transform. This allows for faster crc t10 diff > transforms to be used if they are available. > > +config CRYPTO_CRCT10DIF_TABLE_SIZE > + int "Size of CRCT10DIF crc tables (as a power of 2)" > + depends on CRYPTO_CRCT10DIF > + range 1 5 > + default 1 if EMBEDDED > + default 5 > + help > + Set the table size used by the CRYPTO_CRCT10DIF crc calculation > + Larger values use more memory and are faster. > + > config CRYPTO_CRCT10DIF_PCLMUL > tristate "CRCT10DIF PCLMULQDQ hardware acceleration" > depends on X86 && 64BIT && CRC_T10DIF > diff --git a/crypto/crct10dif_common.c b/crypto/crct10dif_common.c > index b2fab366f518..4eb1c50c3688 100644 > --- a/crypto/crct10dif_common.c > +++ b/crypto/crct10dif_common.c > @@ -32,7 +32,8 @@ > * x^16 + x^15 + x^11 + x^9 + x^8 + x^7 + x^5 + x^4 + x^2 + x + 1 > * gt: 0x8bb7 > */ > -static const __u16 t10_dif_crc_table[256] = { > +static const __u16 t10dif_crc_table[][256] = { > + { <snip data table> > + }, > +#endif > }; > > __u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, size_t len) > { > - unsigned int i; > + const u8 *ptr = (const __u8 *)buffer; > + const u8 *ptr_end = ptr + len; > +#if CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE > 1 > + size_t tablesize = 1 << (CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE - 1); > + const u8 *ptr_last = ptr + (len / tablesize * tablesize); > > - for (i = 0 ; i < len ; i++) > - crc = (crc << 8) ^ t10_dif_crc_table[((crc >> 8) ^ buffer[i]) & 0xff]; > + while (ptr < ptr_last) { > + size_t index = tablesize; > + __u16 t; > + > + t = t10dif_crc_table[--index][*ptr++ ^ (u8)(crc >> 8)]; > + t ^= t10dif_crc_table[--index][*ptr++ ^ (u8)crc]; > + crc = t; > + while (index > 0) > + crc ^= t10dif_crc_table[--index][*ptr++]; > + } > +#endif > + while (ptr < ptr_end) > + crc = t10dif_crc_table[0][*ptr++ ^ (u8)(crc >> 8)] ^ (crc << 8); > > return crc; > } > > It is a bit messy but below is a copy and paste of a table 27 from draft SBC-4 revision 15 in chapter 4.22.4.4 on page 87. Table 27 — CRC test cases Pattern 32 bytes each set to 00h CRC=0000h 32 bytes each set to FFh CRC=A293h 32 bytes of an incrementing pattern from 00h to 1Fh CRC=0224h 2 bytes each set to FFh followed by 30 bytes set to 00h CRC=21B8h 32 bytes of a decrementing pattern from FFh to E0h CRC=A0B7h There is also example C code for its calculation in Annex C on pages 375 and 376. Doug Gilbert
On Fri, 2018-08-10 at 22:39 -0400, Douglas Gilbert wrote: > but below is a copy and paste of a table 27 from draft SBC-4 > revision 15 in chapter 4.22.4.4 on page 87. The posted code returns the proper crc for each CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE value from 1 to 5 for these arrays.
On Sat, 2018-08-11 at 02:04 -0700, Joe Perches wrote: > On Fri, 2018-08-10 at 22:39 -0400, Douglas Gilbert wrote: > > but below is a copy and paste of a table 27 from draft SBC-4 > > revision 15 in chapter 4.22.4.4 on page 87. > > The posted code returns the proper crc for each > CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE value from > 1 to 5 for these arrays. Jeff, could you please test the suggested patch with your comparison framework again with each CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE from 1 to 5? I get on a very limited test framework here: (runtime average of 10 runs) 1: 4.32 2: 1.86 3: 1.31 4: 1.05 5: 0.99
Jeff, > This patch provides a performance improvement for the CRC16 > calculations done in read/write workloads using the T10 Type 1/2/3 > guard field. For example, today with sequential write workloads (one > thread/CPU of IO) we consume 100% of the CPU because of the CRC16 > computation bottleneck. Today's block devices are considerably > faster, but the CRC16 calculation prevents folks from utilizing the > throughput of such devices. To speed up this calculation and expose > the block device throughput, we slice the old single byte for loop > into a 16 byte for loop, with a larger CRC table to match. The result > has shown 5x performance improvements on various big endian and little > endian systems running the 4.18.0 kernel version. The reason I went with a simple slice-by-one approach was that the larger tables had a negative impact on the CPU caches. So while slice-by-N numbers looked better in synthetic benchmarks, actual application performance started getting affected as the tables grew larger. These days we obviously use the hardware-accelerated CRC calculation so the software table approach mostly serves as a reference implementation. But given your big vs. little endian performance metrics, I'm assuming you guys are focused on embedded processors without support for CRC acceleration? I have no problem providing a choice for bigger tables. My only concern is that the selection heuristics need to be more than one-dimensional. Latency and cache side effects are often more important than throughput. At least on the initiator side. Also, I'd like to keep the original slice-by-one implementation for reference purposes.
On Sat, 2018-08-11 at 11:36 -0400, Martin K. Petersen wrote: > Jeff, > > > This patch provides a performance improvement for the CRC16 > > calculations done in read/write workloads using the T10 Type 1/2/3 > > guard field. For example, today with sequential write workloads (one > > thread/CPU of IO) we consume 100% of the CPU because of the CRC16 > > computation bottleneck. Today's block devices are considerably > > faster, but the CRC16 calculation prevents folks from utilizing the > > throughput of such devices. To speed up this calculation and expose > > the block device throughput, we slice the old single byte for loop > > into a 16 byte for loop, with a larger CRC table to match. The result > > has shown 5x performance improvements on various big endian and little > > endian systems running the 4.18.0 kernel version. > > The reason I went with a simple slice-by-one approach was that the > larger tables had a negative impact on the CPU caches. So while > slice-by-N numbers looked better in synthetic benchmarks, actual > application performance started getting affected as the tables grew > larger. > > These days we obviously use the hardware-accelerated CRC calculation so > the software table approach mostly serves as a reference > implementation. But given your big vs. little endian performance > metrics, I'm assuming you guys are focused on embedded processors > without support for CRC acceleration? > > I have no problem providing a choice for bigger tables. My only concern > is that the selection heuristics need to be more than one-dimensional. > Latency and cache side effects are often more important than throughput. > At least on the initiator side. > > Also, I'd like to keep the original slice-by-one implementation for > reference purposes. Did you see the suggested patch that allows either 1, 2, 4, 8 or 16 block table sizes? Perhaps you have a comment on that?
On 2018-08-10 08:11 PM, Joe Perches wrote: > On Fri, 2018-08-10 at 16:02 -0400, Nicolas Pitre wrote: >> On Fri, 10 Aug 2018, Joe Perches wrote: >> >>> On Fri, 2018-08-10 at 14:12 -0500, Jeff Lien wrote: >>>> This patch provides a performance improvement for the CRC16 calculations done in read/write >>>> workloads using the T10 Type 1/2/3 guard field. For example, today with sequential write >>>> workloads (one thread/CPU of IO) we consume 100% of the CPU because of the CRC16 computation >>>> bottleneck. Today's block devices are considerably faster, but the CRC16 calculation prevents >>>> folks from utilizing the throughput of such devices. To speed up this calculation and expose >>>> the block device throughput, we slice the old single byte for loop into a 16 byte for loop, >>>> with a larger CRC table to match. The result has shown 5x performance improvements on various >>>> big endian and little endian systems running the 4.18.0 kernel version. >>> >>> Thanks. >>> >>> This seems a sensible tradeoff for the 4k text size increase. >> >> More like 7.5KB. Would be best if this was configurable so the small >> version remained available. > > Maybe something like: (compiled, untested) > --- > crypto/Kconfig | 10 + > crypto/crct10dif_common.c | 543 +++++++++++++++++++++++++++++++++++++++++++++- > 2 files changed, 549 insertions(+), 4 deletions(-) > > diff --git a/crypto/Kconfig b/crypto/Kconfig > index f3e40ac56d93..88d9d17bb18a 100644 > --- a/crypto/Kconfig > +++ b/crypto/Kconfig > @@ -618,6 +618,16 @@ config CRYPTO_CRCT10DIF > a crypto transform. This allows for faster crc t10 diff > transforms to be used if they are available. > > +config CRYPTO_CRCT10DIF_TABLE_SIZE > + int "Size of CRCT10DIF crc tables (as a power of 2)" > + depends on CRYPTO_CRCT10DIF > + range 1 5 > + default 1 if EMBEDDED > + default 5 > + help > + Set the table size used by the CRYPTO_CRCT10DIF crc calculation > + Larger values use more memory and are faster. > + > config CRYPTO_CRCT10DIF_PCLMUL > tristate "CRCT10DIF PCLMULQDQ hardware acceleration" > depends on X86 && 64BIT && CRC_T10DIF > diff --git a/crypto/crct10dif_common.c b/crypto/crct10dif_common.c > index b2fab366f518..4eb1c50c3688 100644 > --- a/crypto/crct10dif_common.c > +++ b/crypto/crct10dif_common.c > @@ -32,7 +32,8 @@ > * x^16 + x^15 + x^11 + x^9 + x^8 + x^7 + x^5 + x^4 + x^2 + x + 1 > * gt: 0x8bb7 > */ > -static const __u16 t10_dif_crc_table[256] = { > +static const __u16 t10dif_crc_table[][256] = { <snip table> > }; > > __u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, size_t len) > { > - unsigned int i; > + const u8 *ptr = (const __u8 *)buffer; > + const u8 *ptr_end = ptr + len; > +#if CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE > 1 > + size_t tablesize = 1 << (CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE - 1); > + const u8 *ptr_last = ptr + (len / tablesize * tablesize); > > - for (i = 0 ; i < len ; i++) > - crc = (crc << 8) ^ t10_dif_crc_table[((crc >> 8) ^ buffer[i]) & 0xff]; > + while (ptr < ptr_last) { > + size_t index = tablesize; > + __u16 t; > + > + t = t10dif_crc_table[--index][*ptr++ ^ (u8)(crc >> 8)]; > + t ^= t10dif_crc_table[--index][*ptr++ ^ (u8)crc]; > + crc = t; > + while (index > 0) > + crc ^= t10dif_crc_table[--index][*ptr++]; > + } > +#endif > + while (ptr < ptr_end) > + crc = t10dif_crc_table[0][*ptr++ ^ (u8)(crc >> 8)] ^ (crc << 8); > > return crc; > } > > The attached patch is on top of the one above. I tested it in the user space where it is around 20% faster (with a full size table). Also tried swab16 but there was no gain from that (perhaps around a 2% loss). Doug Gilbert diff --git a/crypto/crct10dif_common.c b/crypto/crct10dif_common.c index 4eb1c50c3688..bf5fab98aebb 100644 --- a/crypto/crct10dif_common.c +++ b/crypto/crct10dif_common.c @@ -591,23 +591,30 @@ __u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, size_t len) { const u8 *ptr = (const __u8 *)buffer; const u8 *ptr_end = ptr + len; + const u16 *flat_tbl = (const u16 *)t10dif_crc_table; #if CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE > 1 size_t tablesize = 1 << (CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE - 1); const u8 *ptr_last = ptr + (len / tablesize * tablesize); + /* + * t10dif_crc_table is two dimensional but access as vector via + * flat_tbl for speed. t[k][j] is equivalent to tt[k*num_cols + j]. + * num_cols in this case is 256 allowing tt[k<<8 + j]. Perhaps + * there should be a compile time assert that num_cols==256 . + */ while (ptr < ptr_last) { size_t index = tablesize; __u16 t; - t = t10dif_crc_table[--index][*ptr++ ^ (u8)(crc >> 8)]; - t ^= t10dif_crc_table[--index][*ptr++ ^ (u8)crc]; + t = flat_tbl[(--index << 8) + (*ptr++ ^ (u8)(crc >> 8))]; + t ^= flat_tbl[(--index << 8) + (*ptr++ ^ (u8)crc)]; crc = t; while (index > 0) - crc ^= t10dif_crc_table[--index][*ptr++]; + crc ^= flat_tbl[(--index << 8) + *ptr++]; } #endif while (ptr < ptr_end) - crc = t10dif_crc_table[0][*ptr++ ^ (u8)(crc >> 8)] ^ (crc << 8); + crc = flat_tbl[*ptr++ ^ (u8)(crc >> 8)] ^ (crc << 8); return crc; }
On Sun, 2018-08-12 at 23:36 -0400, Douglas Gilbert wrote: > On 2018-08-10 08:11 PM, Joe Perches wrote: > > On Fri, 2018-08-10 at 16:02 -0400, Nicolas Pitre wrote: > > > On Fri, 10 Aug 2018, Joe Perches wrote: > > > > > > > On Fri, 2018-08-10 at 14:12 -0500, Jeff Lien wrote: > > > > > This patch provides a performance improvement for the CRC16 calculations done in read/write > > > > > workloads using the T10 Type 1/2/3 guard field. For example, today with sequential write > > > > > workloads (one thread/CPU of IO) we consume 100% of the CPU because of the CRC16 computation > > > > > bottleneck. Today's block devices are considerably faster, but the CRC16 calculation prevents > > > > > folks from utilizing the throughput of such devices. To speed up this calculation and expose > > > > > the block device throughput, we slice the old single byte for loop into a 16 byte for loop, > > > > > with a larger CRC table to match. The result has shown 5x performance improvements on various > > > > > big endian and little endian systems running the 4.18.0 kernel version. > > > > > > > > Thanks. > > > > > > > > This seems a sensible tradeoff for the 4k text size increase. > > > > > > More like 7.5KB. Would be best if this was configurable so the small > > > version remained available. > > > > Maybe something like: (compiled, untested) > > --- > > crypto/Kconfig | 10 + > > crypto/crct10dif_common.c | 543 +++++++++++++++++++++++++++++++++++++++++++++- > > 2 files changed, 549 insertions(+), 4 deletions(-) > > > > diff --git a/crypto/Kconfig b/crypto/Kconfig > > index f3e40ac56d93..88d9d17bb18a 100644 > > --- a/crypto/Kconfig > > +++ b/crypto/Kconfig > > @@ -618,6 +618,16 @@ config CRYPTO_CRCT10DIF > > a crypto transform. This allows for faster crc t10 diff > > transforms to be used if they are available. > > > > +config CRYPTO_CRCT10DIF_TABLE_SIZE > > + int "Size of CRCT10DIF crc tables (as a power of 2)" > > + depends on CRYPTO_CRCT10DIF > > + range 1 5 > > + default 1 if EMBEDDED > > + default 5 > > + help > > + Set the table size used by the CRYPTO_CRCT10DIF crc calculation > > + Larger values use more memory and are faster. > > + > > config CRYPTO_CRCT10DIF_PCLMUL > > tristate "CRCT10DIF PCLMULQDQ hardware acceleration" > > depends on X86 && 64BIT && CRC_T10DIF > > diff --git a/crypto/crct10dif_common.c b/crypto/crct10dif_common.c > > index b2fab366f518..4eb1c50c3688 100644 > > --- a/crypto/crct10dif_common.c > > +++ b/crypto/crct10dif_common.c > > @@ -32,7 +32,8 @@ > > * x^16 + x^15 + x^11 + x^9 + x^8 + x^7 + x^5 + x^4 + x^2 + x + 1 > > * gt: 0x8bb7 > > */ > > -static const __u16 t10_dif_crc_table[256] = { > > +static const __u16 t10dif_crc_table[][256] = { > > <snip table> > > > }; > > > > __u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, size_t len) > > { > > - unsigned int i; > > + const u8 *ptr = (const __u8 *)buffer; > > + const u8 *ptr_end = ptr + len; > > +#if CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE > 1 > > + size_t tablesize = 1 << (CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE - 1); > > + const u8 *ptr_last = ptr + (len / tablesize * tablesize); > > > > - for (i = 0 ; i < len ; i++) > > - crc = (crc << 8) ^ t10_dif_crc_table[((crc >> 8) ^ buffer[i]) & 0xff]; > > + while (ptr < ptr_last) { > > + size_t index = tablesize; > > + __u16 t; > > + > > + t = t10dif_crc_table[--index][*ptr++ ^ (u8)(crc >> 8)]; > > + t ^= t10dif_crc_table[--index][*ptr++ ^ (u8)crc]; > > + crc = t; > > + while (index > 0) > > + crc ^= t10dif_crc_table[--index][*ptr++]; > > + } > > +#endif > > + while (ptr < ptr_end) > > + crc = t10dif_crc_table[0][*ptr++ ^ (u8)(crc >> 8)] ^ (crc << 8); > > > > return crc; > > } > > > > > > The attached patch is on top of the one above. I tested it in the user space > where it is around 20% faster (with a full size table). Also tried swab16 but > there was no gain from that (perhaps around a 2% loss). I don't get a significant difference in performance. gcc version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)
On 8/10/18, 12:13 PM, "linux-block-owner@vger.kernel.org on behalf of Jeff Lien" <linux-block-owner@vger.kernel.org on behalf of Jeff.Lien@wdc.com> wrote:
This patch provides a performance improvement for the CRC16 calculations done in read/write
workloads using the T10 Type 1/2/3 guard field. For example, today with sequential write
workloads (one thread/CPU of IO) we consume 100% of the CPU because of the CRC16 computation
bottleneck. Today's block devices are considerably faster, but the CRC16 calculation prevents
folks from utilizing the throughput of such devices. To speed up this calculation and expose
the block device throughput, we slice the old single byte for loop into a 16 byte for loop,
with a larger CRC table to match. The result has shown 5x performance improvements on various
big endian and little endian systems running the 4.18.0 kernel version.
FIO Sequential Write, 64K Block Size, Queue Depth 64
BE Base Kernel: bw=201.5 MiB/s
BE Modified CRC Calc: bw=968.1 MiB/s
4.80x performance improvement
LE Base Kernel: bw=357 MiB/s
LE Modified CRC Calc: bw=1964 MiB/s
5.51x performance improvement
FIO Sequential Read, 64K Block Size, Queue Depth 64
BE Base Kernel: bw=611.2 MiB/s
BE Modified CRC calc: bw=684.9 MiB/s
1.12x performance improvement
LE Base Kernel: bw=797 MiB/s
LE Modified CRC Calc: bw=2730 MiB/s
3.42x performance improvement
Thanks for doing this, can you please share original fio config file?
Reviewed-by: Dave Darrington <david.darrington@wdc.com>
Reviewed-by: Jeff Furlong <jeff.furlong@wdc.com>
Signed-off-by: Jeff Lien <jeff.lien@wdc.com>
---
crypto/crct10dif_common.c | 605 +++++++++++++++++++++++++++++++++++++++++++---
1 file changed, 569 insertions(+), 36 deletions(-)
diff --git a/crypto/crct10dif_common.c b/crypto/crct10dif_common.c
index b2fab36..40e1d6c 100644
--- a/crypto/crct10dif_common.c
+++ b/crypto/crct10dif_common.c
@@ -32,47 +32,580 @@
* x^16 + x^15 + x^11 + x^9 + x^8 + x^7 + x^5 + x^4 + x^2 + x + 1
* gt: 0x8bb7
*/
-static const __u16 t10_dif_crc_table[256] = {
- 0x0000, 0x8BB7, 0x9CD9, 0x176E, 0xB205, 0x39B2, 0x2EDC, 0xA56B,
- 0xEFBD, 0x640A, 0x7364, 0xF8D3, 0x5DB8, 0xD60F, 0xC161, 0x4AD6,
- 0x54CD, 0xDF7A, 0xC814, 0x43A3, 0xE6C8, 0x6D7F, 0x7A11, 0xF1A6,
- 0xBB70, 0x30C7, 0x27A9, 0xAC1E, 0x0975, 0x82C2, 0x95AC, 0x1E1B,
- 0xA99A, 0x222D, 0x3543, 0xBEF4, 0x1B9F, 0x9028, 0x8746, 0x0CF1,
- 0x4627, 0xCD90, 0xDAFE, 0x5149, 0xF422, 0x7F95, 0x68FB, 0xE34C,
- 0xFD57, 0x76E0, 0x618E, 0xEA39, 0x4F52, 0xC4E5, 0xD38B, 0x583C,
- 0x12EA, 0x995D, 0x8E33, 0x0584, 0xA0EF, 0x2B58, 0x3C36, 0xB781,
- 0xD883, 0x5334, 0x445A, 0xCFED, 0x6A86, 0xE131, 0xF65F, 0x7DE8,
- 0x373E, 0xBC89, 0xABE7, 0x2050, 0x853B, 0x0E8C, 0x19E2, 0x9255,
- 0x8C4E, 0x07F9, 0x1097, 0x9B20, 0x3E4B, 0xB5FC, 0xA292, 0x2925,
- 0x63F3, 0xE844, 0xFF2A, 0x749D, 0xD1F6, 0x5A41, 0x4D2F, 0xC698,
- 0x7119, 0xFAAE, 0xEDC0, 0x6677, 0xC31C, 0x48AB, 0x5FC5, 0xD472,
- 0x9EA4, 0x1513, 0x027D, 0x89CA, 0x2CA1, 0xA716, 0xB078, 0x3BCF,
- 0x25D4, 0xAE63, 0xB90D, 0x32BA, 0x97D1, 0x1C66, 0x0B08, 0x80BF,
- 0xCA69, 0x41DE, 0x56B0, 0xDD07, 0x786C, 0xF3DB, 0xE4B5, 0x6F02,
- 0x3AB1, 0xB106, 0xA668, 0x2DDF, 0x88B4, 0x0303, 0x146D, 0x9FDA,
- 0xD50C, 0x5EBB, 0x49D5, 0xC262, 0x6709, 0xECBE, 0xFBD0, 0x7067,
- 0x6E7C, 0xE5CB, 0xF2A5, 0x7912, 0xDC79, 0x57CE, 0x40A0, 0xCB17,
- 0x81C1, 0x0A76, 0x1D18, 0x96AF, 0x33C4, 0xB873, 0xAF1D, 0x24AA,
- 0x932B, 0x189C, 0x0FF2, 0x8445, 0x212E, 0xAA99, 0xBDF7, 0x3640,
- 0x7C96, 0xF721, 0xE04F, 0x6BF8, 0xCE93, 0x4524, 0x524A, 0xD9FD,
- 0xC7E6, 0x4C51, 0x5B3F, 0xD088, 0x75E3, 0xFE54, 0xE93A, 0x628D,
- 0x285B, 0xA3EC, 0xB482, 0x3F35, 0x9A5E, 0x11E9, 0x0687, 0x8D30,
- 0xE232, 0x6985, 0x7EEB, 0xF55C, 0x5037, 0xDB80, 0xCCEE, 0x4759,
- 0x0D8F, 0x8638, 0x9156, 0x1AE1, 0xBF8A, 0x343D, 0x2353, 0xA8E4,
- 0xB6FF, 0x3D48, 0x2A26, 0xA191, 0x04FA, 0x8F4D, 0x9823, 0x1394,
- 0x5942, 0xD2F5, 0xC59B, 0x4E2C, 0xEB47, 0x60F0, 0x779E, 0xFC29,
- 0x4BA8, 0xC01F, 0xD771, 0x5CC6, 0xF9AD, 0x721A, 0x6574, 0xEEC3,
- 0xA415, 0x2FA2, 0x38CC, 0xB37B, 0x1610, 0x9DA7, 0x8AC9, 0x017E,
- 0x1F65, 0x94D2, 0x83BC, 0x080B, 0xAD60, 0x26D7, 0x31B9, 0xBA0E,
- 0xF0D8, 0x7B6F, 0x6C01, 0xE7B6, 0x42DD, 0xC96A, 0xDE04, 0x55B3
Please add or update the comment here about how this table is generated.
+static const __u16 t10_dif_crc_table[16][256] = {
+ {
+ 0x0000u, 0x8BB7u, 0x9CD9u, 0x176Eu, 0xB205u, 0x39B2u, 0x2EDCu, 0xA56Bu,
+ 0xEFBDu, 0x640Au, 0x7364u, 0xF8D3u, 0x5DB8u, 0xD60Fu, 0xC161u, 0x4AD6u,
+ 0x54CDu, 0xDF7Au, 0xC814u, 0x43A3u, 0xE6C8u, 0x6D7Fu, 0x7A11u, 0xF1A6u,
+ 0xBB70u, 0x30C7u, 0x27A9u, 0xAC1Eu, 0x0975u, 0x82C2u, 0x95ACu, 0x1E1Bu,
+ 0xA99Au, 0x222Du, 0x3543u, 0xBEF4u, 0x1B9Fu, 0x9028u, 0x8746u, 0x0CF1u,
+ 0x4627u, 0xCD90u, 0xDAFEu, 0x5149u, 0xF422u, 0x7F95u, 0x68FBu, 0xE34Cu,
+ 0xFD57u, 0x76E0u, 0x618Eu, 0xEA39u, 0x4F52u, 0xC4E5u, 0xD38Bu, 0x583Cu,
+ 0x12EAu, 0x995Du, 0x8E33u, 0x0584u, 0xA0EFu, 0x2B58u, 0x3C36u, 0xB781u,
+ 0xD883u, 0x5334u, 0x445Au, 0xCFEDu, 0x6A86u, 0xE131u, 0xF65Fu, 0x7DE8u,
+ 0x373Eu, 0xBC89u, 0xABE7u, 0x2050u, 0x853Bu, 0x0E8Cu, 0x19E2u, 0x9255u,
+ 0x8C4Eu, 0x07F9u, 0x1097u, 0x9B20u, 0x3E4Bu, 0xB5FCu, 0xA292u, 0x2925u,
+ 0x63F3u, 0xE844u, 0xFF2Au, 0x749Du, 0xD1F6u, 0x5A41u, 0x4D2Fu, 0xC698u,
+ 0x7119u, 0xFAAEu, 0xEDC0u, 0x6677u, 0xC31Cu, 0x48ABu, 0x5FC5u, 0xD472u,
+ 0x9EA4u, 0x1513u, 0x027Du, 0x89CAu, 0x2CA1u, 0xA716u, 0xB078u, 0x3BCFu,
+ 0x25D4u, 0xAE63u, 0xB90Du, 0x32BAu, 0x97D1u, 0x1C66u, 0x0B08u, 0x80BFu,
+ 0xCA69u, 0x41DEu, 0x56B0u, 0xDD07u, 0x786Cu, 0xF3DBu, 0xE4B5u, 0x6F02u,
+ 0x3AB1u, 0xB106u, 0xA668u, 0x2DDFu, 0x88B4u, 0x0303u, 0x146Du, 0x9FDAu,
+ 0xD50Cu, 0x5EBBu, 0x49D5u, 0xC262u, 0x6709u, 0xECBEu, 0xFBD0u, 0x7067u,
+ 0x6E7Cu, 0xE5CBu, 0xF2A5u, 0x7912u, 0xDC79u, 0x57CEu, 0x40A0u, 0xCB17u,
+ 0x81C1u, 0x0A76u, 0x1D18u, 0x96AFu, 0x33C4u, 0xB873u, 0xAF1Du, 0x24AAu,
+ 0x932Bu, 0x189Cu, 0x0FF2u, 0x8445u, 0x212Eu, 0xAA99u, 0xBDF7u, 0x3640u,
+ 0x7C96u, 0xF721u, 0xE04Fu, 0x6BF8u, 0xCE93u, 0x4524u, 0x524Au, 0xD9FDu,
+ 0xC7E6u, 0x4C51u, 0x5B3Fu, 0xD088u, 0x75E3u, 0xFE54u, 0xE93Au, 0x628Du,
+ 0x285Bu, 0xA3ECu, 0xB482u, 0x3F35u, 0x9A5Eu, 0x11E9u, 0x0687u, 0x8D30u,
+ 0xE232u, 0x6985u, 0x7EEBu, 0xF55Cu, 0x5037u, 0xDB80u, 0xCCEEu, 0x4759u,
+ 0x0D8Fu, 0x8638u, 0x9156u, 0x1AE1u, 0xBF8Au, 0x343Du, 0x2353u, 0xA8E4u,
+ 0xB6FFu, 0x3D48u, 0x2A26u, 0xA191u, 0x04FAu, 0x8F4Du, 0x9823u, 0x1394u,
+ 0x5942u, 0xD2F5u, 0xC59Bu, 0x4E2Cu, 0xEB47u, 0x60F0u, 0x779Eu, 0xFC29u,
+ 0x4BA8u, 0xC01Fu, 0xD771u, 0x5CC6u, 0xF9ADu, 0x721Au, 0x6574u, 0xEEC3u,
+ 0xA415u, 0x2FA2u, 0x38CCu, 0xB37Bu, 0x1610u, 0x9DA7u, 0x8AC9u, 0x017Eu,
+ 0x1F65u, 0x94D2u, 0x83BCu, 0x080Bu, 0xAD60u, 0x26D7u, 0x31B9u, 0xBA0Eu,
+ 0xF0D8u, 0x7B6Fu, 0x6C01u, 0xE7B6u, 0x42DDu, 0xC96Au, 0xDE04u, 0x55B3u
+ },
+ {
+ 0x0000u, 0x7562u, 0xEAC4u, 0x9FA6u, 0x5E3Fu, 0x2B5Du, 0xB4FBu, 0xC199u,
+ 0xBC7Eu, 0xC91Cu, 0x56BAu, 0x23D8u, 0xE241u, 0x9723u, 0x0885u, 0x7DE7u,
+ 0xF34Bu, 0x8629u, 0x198Fu, 0x6CEDu, 0xAD74u, 0xD816u, 0x47B0u, 0x32D2u,
+ 0x4F35u, 0x3A57u, 0xA5F1u, 0xD093u, 0x110Au, 0x6468u, 0xFBCEu, 0x8EACu,
+ 0x6D21u, 0x1843u, 0x87E5u, 0xF287u, 0x331Eu, 0x467Cu, 0xD9DAu, 0xACB8u,
+ 0xD15Fu, 0xA43Du, 0x3B9Bu, 0x4EF9u, 0x8F60u, 0xFA02u, 0x65A4u, 0x10C6u,
+ 0x9E6Au, 0xEB08u, 0x74AEu, 0x01CCu, 0xC055u, 0xB537u, 0x2A91u, 0x5FF3u,
+ 0x2214u, 0x5776u, 0xC8D0u, 0xBDB2u, 0x7C2Bu, 0x0949u, 0x96EFu, 0xE38Du,
+ 0xDA42u, 0xAF20u, 0x3086u, 0x45E4u, 0x847Du, 0xF11Fu, 0x6EB9u, 0x1BDBu,
+ 0x663Cu, 0x135Eu, 0x8CF8u, 0xF99Au, 0x3803u, 0x4D61u, 0xD2C7u, 0xA7A5u,
+ 0x2909u, 0x5C6Bu, 0xC3CDu, 0xB6AFu, 0x7736u, 0x0254u, 0x9DF2u, 0xE890u,
+ 0x9577u, 0xE015u, 0x7FB3u, 0x0AD1u, 0xCB48u, 0xBE2Au, 0x218Cu, 0x54EEu,
+ 0xB763u, 0xC201u, 0x5DA7u, 0x28C5u, 0xE95Cu, 0x9C3Eu, 0x0398u, 0x76FAu,
+ 0x0B1Du, 0x7E7Fu, 0xE1D9u, 0x94BBu, 0x5522u, 0x2040u, 0xBFE6u, 0xCA84u,
+ 0x4428u, 0x314Au, 0xAEECu, 0xDB8Eu, 0x1A17u, 0x6F75u, 0xF0D3u, 0x85B1u,
+ 0xF856u, 0x8D34u, 0x1292u, 0x67F0u, 0xA669u, 0xD30Bu, 0x4CADu, 0x39CFu,
+ 0x3F33u, 0x4A51u, 0xD5F7u, 0xA095u, 0x610Cu, 0x146Eu, 0x8BC8u, 0xFEAAu,
+ 0x834Du, 0xF62Fu, 0x6989u, 0x1CEBu, 0xDD72u, 0xA810u, 0x37B6u, 0x42D4u,
+ 0xCC78u, 0xB91Au, 0x26BCu, 0x53DEu, 0x9247u, 0xE725u, 0x7883u, 0x0DE1u,
+ 0x7006u, 0x0564u, 0x9AC2u, 0xEFA0u, 0x2E39u, 0x5B5Bu, 0xC4FDu, 0xB19Fu,
+ 0x5212u, 0x2770u, 0xB8D6u, 0xCDB4u, 0x0C2Du, 0x794Fu, 0xE6E9u, 0x938Bu,
+ 0xEE6Cu, 0x9B0Eu, 0x04A8u, 0x71CAu, 0xB053u, 0xC531u, 0x5A97u, 0x2FF5u,
+ 0xA159u, 0xD43Bu, 0x4B9Du, 0x3EFFu, 0xFF66u, 0x8A04u, 0x15A2u, 0x60C0u,
+ 0x1D27u, 0x6845u, 0xF7E3u, 0x8281u, 0x4318u, 0x367Au, 0xA9DCu, 0xDCBEu,
+ 0xE571u, 0x9013u, 0x0FB5u, 0x7AD7u, 0xBB4Eu, 0xCE2Cu, 0x518Au, 0x24E8u,
+ 0x590Fu, 0x2C6Du, 0xB3CBu, 0xC6A9u, 0x0730u, 0x7252u, 0xEDF4u, 0x9896u,
+ 0x163Au, 0x6358u, 0xFCFEu, 0x899Cu, 0x4805u, 0x3D67u, 0xA2C1u, 0xD7A3u,
+ 0xAA44u, 0xDF26u, 0x4080u, 0x35E2u, 0xF47Bu, 0x8119u, 0x1EBFu, 0x6BDDu,
+ 0x8850u, 0xFD32u, 0x6294u, 0x17F6u, 0xD66Fu, 0xA30Du, 0x3CABu, 0x49C9u,
+ 0x342Eu, 0x414Cu, 0xDEEAu, 0xAB88u, 0x6A11u, 0x1F73u, 0x80D5u, 0xF5B7u,
+ 0x7B1Bu, 0x0E79u, 0x91DFu, 0xE4BDu, 0x2524u, 0x5046u, 0xCFE0u, 0xBA82u,
+ 0xC765u, 0xB207u, 0x2DA1u, 0x58C3u, 0x995Au, 0xEC38u, 0x739Eu, 0x06FCu
+ },
+ {
+ 0x0000u, 0x7E66u, 0xFCCCu, 0x82AAu, 0x722Fu, 0x0C49u, 0x8EE3u, 0xF085u,
+ 0xE45Eu, 0x9A38u, 0x1892u, 0x66F4u, 0x9671u, 0xE817u, 0x6ABDu, 0x14DBu,
+ 0x430Bu, 0x3D6Du, 0xBFC7u, 0xC1A1u, 0x3124u, 0x4F42u, 0xCDE8u, 0xB38Eu,
+ 0xA755u, 0xD933u, 0x5B99u, 0x25FFu, 0xD57Au, 0xAB1Cu, 0x29B6u, 0x57D0u,
+ 0x8616u, 0xF870u, 0x7ADAu, 0x04BCu, 0xF439u, 0x8A5Fu, 0x08F5u, 0x7693u,
+ 0x6248u, 0x1C2Eu, 0x9E84u, 0xE0E2u, 0x1067u, 0x6E01u, 0xECABu, 0x92CDu,
+ 0xC51Du, 0xBB7Bu, 0x39D1u, 0x47B7u, 0xB732u, 0xC954u, 0x4BFEu, 0x3598u,
+ 0x2143u, 0x5F25u, 0xDD8Fu, 0xA3E9u, 0x536Cu, 0x2D0Au, 0xAFA0u, 0xD1C6u,
+ 0x879Bu, 0xF9FDu, 0x7B57u, 0x0531u, 0xF5B4u, 0x8BD2u, 0x0978u, 0x771Eu,
+ 0x63C5u, 0x1DA3u, 0x9F09u, 0xE16Fu, 0x11EAu, 0x6F8Cu, 0xED26u, 0x9340u,
+ 0xC490u, 0xBAF6u, 0x385Cu, 0x463Au, 0xB6BFu, 0xC8D9u, 0x4A73u, 0x3415u,
+ 0x20CEu, 0x5EA8u, 0xDC02u, 0xA264u, 0x52E1u, 0x2C87u, 0xAE2Du, 0xD04Bu,
+ 0x018Du, 0x7FEBu, 0xFD41u, 0x8327u, 0x73A2u, 0x0DC4u, 0x8F6Eu, 0xF108u,
+ 0xE5D3u, 0x9BB5u, 0x191Fu, 0x6779u, 0x97FCu, 0xE99Au, 0x6B30u, 0x1556u,
+ 0x4286u, 0x3CE0u, 0xBE4Au, 0xC02Cu, 0x30A9u, 0x4ECFu, 0xCC65u, 0xB203u,
+ 0xA6D8u, 0xD8BEu, 0x5A14u, 0x2472u, 0xD4F7u, 0xAA91u, 0x283Bu, 0x565Du,
+ 0x8481u, 0xFAE7u, 0x784Du, 0x062Bu, 0xF6AEu, 0x88C8u, 0x0A62u, 0x7404u,
+ 0x60DFu, 0x1EB9u, 0x9C13u, 0xE275u, 0x12F0u, 0x6C96u, 0xEE3Cu, 0x905Au,
+ 0xC78Au, 0xB9ECu, 0x3B46u, 0x4520u, 0xB5A5u, 0xCBC3u, 0x4969u, 0x370Fu,
+ 0x23D4u, 0x5DB2u, 0xDF18u, 0xA17Eu, 0x51FBu, 0x2F9Du, 0xAD37u, 0xD351u,
+ 0x0297u, 0x7CF1u, 0xFE5Bu, 0x803Du, 0x70B8u, 0x0EDEu, 0x8C74u, 0xF212u,
+ 0xE6C9u, 0x98AFu, 0x1A05u, 0x6463u, 0x94E6u, 0xEA80u, 0x682Au, 0x164Cu,
+ 0x419Cu, 0x3FFAu, 0xBD50u, 0xC336u, 0x33B3u, 0x4DD5u, 0xCF7Fu, 0xB119u,
+ 0xA5C2u, 0xDBA4u, 0x590Eu, 0x2768u, 0xD7EDu, 0xA98Bu, 0x2B21u, 0x5547u,
+ 0x031Au, 0x7D7Cu, 0xFFD6u, 0x81B0u, 0x7135u, 0x0F53u, 0x8DF9u, 0xF39Fu,
+ 0xE744u, 0x9922u, 0x1B88u, 0x65EEu, 0x956Bu, 0xEB0Du, 0x69A7u, 0x17C1u,
+ 0x4011u, 0x3E77u, 0xBCDDu, 0xC2BBu, 0x323Eu, 0x4C58u, 0xCEF2u, 0xB094u,
+ 0xA44Fu, 0xDA29u, 0x5883u, 0x26E5u, 0xD660u, 0xA806u, 0x2AACu, 0x54CAu,
+ 0x850Cu, 0xFB6Au, 0x79C0u, 0x07A6u, 0xF723u, 0x8945u, 0x0BEFu, 0x7589u,
+ 0x6152u, 0x1F34u, 0x9D9Eu, 0xE3F8u, 0x137Du, 0x6D1Bu, 0xEFB1u, 0x91D7u,
+ 0xC607u, 0xB861u, 0x3ACBu, 0x44ADu, 0xB428u, 0xCA4Eu, 0x48E4u, 0x3682u,
+ 0x2259u, 0x5C3Fu, 0xDE95u, 0xA0F3u, 0x5076u, 0x2E10u, 0xACBAu, 0xD2DCu
+ },
+ {
+ 0x0000u, 0x82B5u, 0x8EDDu, 0x0C68u, 0x960Du, 0x14B8u, 0x18D0u, 0x9A65u,
+ 0xA7ADu, 0x2518u, 0x2970u, 0xABC5u, 0x31A0u, 0xB315u, 0xBF7Du, 0x3DC8u,
+ 0xC4EDu, 0x4658u, 0x4A30u, 0xC885u, 0x52E0u, 0xD055u, 0xDC3Du, 0x5E88u,
+ 0x6340u, 0xE1F5u, 0xED9Du, 0x6F28u, 0xF54Du, 0x77F8u, 0x7B90u, 0xF925u,
+ 0x026Du, 0x80D8u, 0x8CB0u, 0x0E05u, 0x9460u, 0x16D5u, 0x1ABDu, 0x9808u,
+ 0xA5C0u, 0x2775u, 0x2B1Du, 0xA9A8u, 0x33CDu, 0xB178u, 0xBD10u, 0x3FA5u,
+ 0xC680u, 0x4435u, 0x485Du, 0xCAE8u, 0x508Du, 0xD238u, 0xDE50u, 0x5CE5u,
+ 0x612Du, 0xE398u, 0xEFF0u, 0x6D45u, 0xF720u, 0x7595u, 0x79FDu, 0xFB48u,
+ 0x04DAu, 0x866Fu, 0x8A07u, 0x08B2u, 0x92D7u, 0x1062u, 0x1C0Au, 0x9EBFu,
+ 0xA377u, 0x21C2u, 0x2DAAu, 0xAF1Fu, 0x357Au, 0xB7CFu, 0xBBA7u, 0x3912u,
+ 0xC037u, 0x4282u, 0x4EEAu, 0xCC5Fu, 0x563Au, 0xD48Fu, 0xD8E7u, 0x5A52u,
+ 0x679Au, 0xE52Fu, 0xE947u, 0x6BF2u, 0xF197u, 0x7322u, 0x7F4Au, 0xFDFFu,
+ 0x06B7u, 0x8402u, 0x886Au, 0x0ADFu, 0x90BAu, 0x120Fu, 0x1E67u, 0x9CD2u,
+ 0xA11Au, 0x23AFu, 0x2FC7u, 0xAD72u, 0x3717u, 0xB5A2u, 0xB9CAu, 0x3B7Fu,
+ 0xC25Au, 0x40EFu, 0x4C87u, 0xCE32u, 0x5457u, 0xD6E2u, 0xDA8Au, 0x583Fu,
+ 0x65F7u, 0xE742u, 0xEB2Au, 0x699Fu, 0xF3FAu, 0x714Fu, 0x7D27u, 0xFF92u,
+ 0x09B4u, 0x8B01u, 0x8769u, 0x05DCu, 0x9FB9u, 0x1D0Cu, 0x1164u, 0x93D1u,
+ 0xAE19u, 0x2CACu, 0x20C4u, 0xA271u, 0x3814u, 0xBAA1u, 0xB6C9u, 0x347Cu,
+ 0xCD59u, 0x4FECu, 0x4384u, 0xC131u, 0x5B54u, 0xD9E1u, 0xD589u, 0x573Cu,
+ 0x6AF4u, 0xE841u, 0xE429u, 0x669Cu, 0xFCF9u, 0x7E4Cu, 0x7224u, 0xF091u,
+ 0x0BD9u, 0x896Cu, 0x8504u, 0x07B1u, 0x9DD4u, 0x1F61u, 0x1309u, 0x91BCu,
+ 0xAC74u, 0x2EC1u, 0x22A9u, 0xA01Cu, 0x3A79u, 0xB8CCu, 0xB4A4u, 0x3611u,
+ 0xCF34u, 0x4D81u, 0x41E9u, 0xC35Cu, 0x5939u, 0xDB8Cu, 0xD7E4u, 0x5551u,
+ 0x6899u, 0xEA2Cu, 0xE644u, 0x64F1u, 0xFE94u, 0x7C21u, 0x7049u, 0xF2FCu,
+ 0x0D6Eu, 0x8FDBu, 0x83B3u, 0x0106u, 0x9B63u, 0x19D6u, 0x15BEu, 0x970Bu,
+ 0xAAC3u, 0x2876u, 0x241Eu, 0xA6ABu, 0x3CCEu, 0xBE7Bu, 0xB213u, 0x30A6u,
+ 0xC983u, 0x4B36u, 0x475Eu, 0xC5EBu, 0x5F8Eu, 0xDD3Bu, 0xD153u, 0x53E6u,
+ 0x6E2Eu, 0xEC9Bu, 0xE0F3u, 0x6246u, 0xF823u, 0x7A96u, 0x76FEu, 0xF44Bu,
+ 0x0F03u, 0x8DB6u, 0x81DEu, 0x036Bu, 0x990Eu, 0x1BBBu, 0x17D3u, 0x9566u,
+ 0xA8AEu, 0x2A1Bu, 0x2673u, 0xA4C6u, 0x3EA3u, 0xBC16u, 0xB07Eu, 0x32CBu,
+ 0xCBEEu, 0x495Bu, 0x4533u, 0xC786u, 0x5DE3u, 0xDF56u, 0xD33Eu, 0x518Bu,
+ 0x6C43u, 0xEEF6u, 0xE29Eu, 0x602Bu, 0xFA4Eu, 0x78FBu, 0x7493u, 0xF626u
+ },
+ {
+ 0x0000u, 0x1368u, 0x26D0u, 0x35B8u, 0x4DA0u, 0x5EC8u, 0x6B70u, 0x7818u,
+ 0x9B40u, 0x8828u, 0xBD90u, 0xAEF8u, 0xD6E0u, 0xC588u, 0xF030u, 0xE358u,
+ 0xBD37u, 0xAE5Fu, 0x9BE7u, 0x888Fu, 0xF097u, 0xE3FFu, 0xD647u, 0xC52Fu,
+ 0x2677u, 0x351Fu, 0x00A7u, 0x13CFu, 0x6BD7u, 0x78BFu, 0x4D07u, 0x5E6Fu,
+ 0xF1D9u, 0xE2B1u, 0xD709u, 0xC461u, 0xBC79u, 0xAF11u, 0x9AA9u, 0x89C1u,
+ 0x6A99u, 0x79F1u, 0x4C49u, 0x5F21u, 0x2739u, 0x3451u, 0x01E9u, 0x1281u,
+ 0x4CEEu, 0x5F86u, 0x6A3Eu, 0x7956u, 0x014Eu, 0x1226u, 0x279Eu, 0x34F6u,
+ 0xD7AEu, 0xC4C6u, 0xF17Eu, 0xE216u, 0x9A0Eu, 0x8966u, 0xBCDEu, 0xAFB6u,
+ 0x6805u, 0x7B6Du, 0x4ED5u, 0x5DBDu, 0x25A5u, 0x36CDu, 0x0375u, 0x101Du,
+ 0xF345u, 0xE02Du, 0xD595u, 0xC6FDu, 0xBEE5u, 0xAD8Du, 0x9835u, 0x8B5Du,
+ 0xD532u, 0xC65Au, 0xF3E2u, 0xE08Au, 0x9892u, 0x8BFAu, 0xBE42u, 0xAD2Au,
+ 0x4E72u, 0x5D1Au, 0x68A2u, 0x7BCAu, 0x03D2u, 0x10BAu, 0x2502u, 0x366Au,
+ 0x99DCu, 0x8AB4u, 0xBF0Cu, 0xAC64u, 0xD47Cu, 0xC714u, 0xF2ACu, 0xE1C4u,
+ 0x029Cu, 0x11F4u, 0x244Cu, 0x3724u, 0x4F3Cu, 0x5C54u, 0x69ECu, 0x7A84u,
+ 0x24EBu, 0x3783u, 0x023Bu, 0x1153u, 0x694Bu, 0x7A23u, 0x4F9Bu, 0x5CF3u,
+ 0xBFABu, 0xACC3u, 0x997Bu, 0x8A13u, 0xF20Bu, 0xE163u, 0xD4DBu, 0xC7B3u,
+ 0xD00Au, 0xC362u, 0xF6DAu, 0xE5B2u, 0x9DAAu, 0x8EC2u, 0xBB7Au, 0xA812u,
+ 0x4B4Au, 0x5822u, 0x6D9Au, 0x7EF2u, 0x06EAu, 0x1582u, 0x203Au, 0x3352u,
+ 0x6D3Du, 0x7E55u, 0x4BEDu, 0x5885u, 0x209Du, 0x33F5u, 0x064Du, 0x1525u,
+ 0xF67Du, 0xE515u, 0xD0ADu, 0xC3C5u, 0xBBDDu, 0xA8B5u, 0x9D0Du, 0x8E65u,
+ 0x21D3u, 0x32BBu, 0x0703u, 0x146Bu, 0x6C73u, 0x7F1Bu, 0x4AA3u, 0x59CBu,
+ 0xBA93u, 0xA9FBu, 0x9C43u, 0x8F2Bu, 0xF733u, 0xE45Bu, 0xD1E3u, 0xC28Bu,
+ 0x9CE4u, 0x8F8Cu, 0xBA34u, 0xA95Cu, 0xD144u, 0xC22Cu, 0xF794u, 0xE4FCu,
+ 0x07A4u, 0x14CCu, 0x2174u, 0x321Cu, 0x4A04u, 0x596Cu, 0x6CD4u, 0x7FBCu,
+ 0xB80Fu, 0xAB67u, 0x9EDFu, 0x8DB7u, 0xF5AFu, 0xE6C7u, 0xD37Fu, 0xC017u,
+ 0x234Fu, 0x3027u, 0x059Fu, 0x16F7u, 0x6EEFu, 0x7D87u, 0x483Fu, 0x5B57u,
+ 0x0538u, 0x1650u, 0x23E8u, 0x3080u, 0x4898u, 0x5BF0u, 0x6E48u, 0x7D20u,
+ 0x9E78u, 0x8D10u, 0xB8A8u, 0xABC0u, 0xD3D8u, 0xC0B0u, 0xF508u, 0xE660u,
+ 0x49D6u, 0x5ABEu, 0x6F06u, 0x7C6Eu, 0x0476u, 0x171Eu, 0x22A6u, 0x31CEu,
+ 0xD296u, 0xC1FEu, 0xF446u, 0xE72Eu, 0x9F36u, 0x8C5Eu, 0xB9E6u, 0xAA8Eu,
+ 0xF4E1u, 0xE789u, 0xD231u, 0xC159u, 0xB941u, 0xAA29u, 0x9F91u, 0x8CF9u,
+ 0x6FA1u, 0x7CC9u, 0x4971u, 0x5A19u, 0x2201u, 0x3169u, 0x04D1u, 0x17B9u
+ },
+ {
+ 0x0000u, 0x2BA3u, 0x5746u, 0x7CE5u, 0xAE8Cu, 0x852Fu, 0xF9CAu, 0xD269u,
+ 0xD6AFu, 0xFD0Cu, 0x81E9u, 0xAA4Au, 0x7823u, 0x5380u, 0x2F65u, 0x04C6u,
+ 0x26E9u, 0x0D4Au, 0x71AFu, 0x5A0Cu, 0x8865u, 0xA3C6u, 0xDF23u, 0xF480u,
+ 0xF046u, 0xDBE5u, 0xA700u, 0x8CA3u, 0x5ECAu, 0x7569u, 0x098Cu, 0x222Fu,
+ 0x4DD2u, 0x6671u, 0x1A94u, 0x3137u, 0xE35Eu, 0xC8FDu, 0xB418u, 0x9FBBu,
+ 0x9B7Du, 0xB0DEu, 0xCC3Bu, 0xE798u, 0x35F1u, 0x1E52u, 0x62B7u, 0x4914u,
+ 0x6B3Bu, 0x4098u, 0x3C7Du, 0x17DEu, 0xC5B7u, 0xEE14u, 0x92F1u, 0xB952u,
+ 0xBD94u, 0x9637u, 0xEAD2u, 0xC171u, 0x1318u, 0x38BBu, 0x445Eu, 0x6FFDu,
+ 0x9BA4u, 0xB007u, 0xCCE2u, 0xE741u, 0x3528u, 0x1E8Bu, 0x626Eu, 0x49CDu,
+ 0x4D0Bu, 0x66A8u, 0x1A4Du, 0x31EEu, 0xE387u, 0xC824u, 0xB4C1u, 0x9F62u,
+ 0xBD4Du, 0x96EEu, 0xEA0Bu, 0xC1A8u, 0x13C1u, 0x3862u, 0x4487u, 0x6F24u,
+ 0x6BE2u, 0x4041u, 0x3CA4u, 0x1707u, 0xC56Eu, 0xEECDu, 0x9228u, 0xB98Bu,
+ 0xD676u, 0xFDD5u, 0x8130u, 0xAA93u, 0x78FAu, 0x5359u, 0x2FBCu, 0x041Fu,
+ 0x00D9u, 0x2B7Au, 0x579Fu, 0x7C3Cu, 0xAE55u, 0x85F6u, 0xF913u, 0xD2B0u,
+ 0xF09Fu, 0xDB3Cu, 0xA7D9u, 0x8C7Au, 0x5E13u, 0x75B0u, 0x0955u, 0x22F6u,
+ 0x2630u, 0x0D93u, 0x7176u, 0x5AD5u, 0x88BCu, 0xA31Fu, 0xDFFAu, 0xF459u,
+ 0xBCFFu, 0x975Cu, 0xEBB9u, 0xC01Au, 0x1273u, 0x39D0u, 0x4535u, 0x6E96u,
+ 0x6A50u, 0x41F3u, 0x3D16u, 0x16B5u, 0xC4DCu, 0xEF7Fu, 0x939Au, 0xB839u,
+ 0x9A16u, 0xB1B5u, 0xCD50u, 0xE6F3u, 0x349Au, 0x1F39u, 0x63DCu, 0x487Fu,
+ 0x4CB9u, 0x671Au, 0x1BFFu, 0x305Cu, 0xE235u, 0xC996u, 0xB573u, 0x9ED0u,
+ 0xF12Du, 0xDA8Eu, 0xA66Bu, 0x8DC8u, 0x5FA1u, 0x7402u, 0x08E7u, 0x2344u,
+ 0x2782u, 0x0C21u, 0x70C4u, 0x5B67u, 0x890Eu, 0xA2ADu, 0xDE48u, 0xF5EBu,
+ 0xD7C4u, 0xFC67u, 0x8082u, 0xAB21u, 0x7948u, 0x52EBu, 0x2E0Eu, 0x05ADu,
+ 0x016Bu, 0x2AC8u, 0x562Du, 0x7D8Eu, 0xAFE7u, 0x8444u, 0xF8A1u, 0xD302u,
+ 0x275Bu, 0x0CF8u, 0x701Du, 0x5BBEu, 0x89D7u, 0xA274u, 0xDE91u, 0xF532u,
+ 0xF1F4u, 0xDA57u, 0xA6B2u, 0x8D11u, 0x5F78u, 0x74DBu, 0x083Eu, 0x239Du,
+ 0x01B2u, 0x2A11u, 0x56F4u, 0x7D57u, 0xAF3Eu, 0x849Du, 0xF878u, 0xD3DBu,
+ 0xD71Du, 0xFCBEu, 0x805Bu, 0xABF8u, 0x7991u, 0x5232u, 0x2ED7u, 0x0574u,
+ 0x6A89u, 0x412Au, 0x3DCFu, 0x166Cu, 0xC405u, 0xEFA6u, 0x9343u, 0xB8E0u,
+ 0xBC26u, 0x9785u, 0xEB60u, 0xC0C3u, 0x12AAu, 0x3909u, 0x45ECu, 0x6E4Fu,
+ 0x4C60u, 0x67C3u, 0x1B26u, 0x3085u, 0xE2ECu, 0xC94Fu, 0xB5AAu, 0x9E09u,
+ 0x9ACFu, 0xB16Cu, 0xCD89u, 0xE62Au, 0x3443u, 0x1FE0u, 0x6305u, 0x48A6u
+ },
+ {
+ 0x0000u, 0xF249u, 0x6F25u, 0x9D6Cu, 0xDE4Au, 0x2C03u, 0xB16Fu, 0x4326u,
+ 0x3723u, 0xC56Au, 0x5806u, 0xAA4Fu, 0xE969u, 0x1B20u, 0x864Cu, 0x7405u,
+ 0x6E46u, 0x9C0Fu, 0x0163u, 0xF32Au, 0xB00Cu, 0x4245u, 0xDF29u, 0x2D60u,
+ 0x5965u, 0xAB2Cu, 0x3640u, 0xC409u, 0x872Fu, 0x7566u, 0xE80Au, 0x1A43u,
+ 0xDC8Cu, 0x2EC5u, 0xB3A9u, 0x41E0u, 0x02C6u, 0xF08Fu, 0x6DE3u, 0x9FAAu,
+ 0xEBAFu, 0x19E6u, 0x848Au, 0x76C3u, 0x35E5u, 0xC7ACu, 0x5AC0u, 0xA889u,
+ 0xB2CAu, 0x4083u, 0xDDEFu, 0x2FA6u, 0x6C80u, 0x9EC9u, 0x03A5u, 0xF1ECu,
+ 0x85E9u, 0x77A0u, 0xEACCu, 0x1885u, 0x5BA3u, 0xA9EAu, 0x3486u, 0xC6CFu,
+ 0x32AFu, 0xC0E6u, 0x5D8Au, 0xAFC3u, 0xECE5u, 0x1EACu, 0x83C0u, 0x7189u,
+ 0x058Cu, 0xF7C5u, 0x6AA9u, 0x98E0u, 0xDBC6u, 0x298Fu, 0xB4E3u, 0x46AAu,
+ 0x5CE9u, 0xAEA0u, 0x33CCu, 0xC185u, 0x82A3u, 0x70EAu, 0xED86u, 0x1FCFu,
+ 0x6BCAu, 0x9983u, 0x04EFu, 0xF6A6u, 0xB580u, 0x47C9u, 0xDAA5u, 0x28ECu,
+ 0xEE23u, 0x1C6Au, 0x8106u, 0x734Fu, 0x3069u, 0xC220u, 0x5F4Cu, 0xAD05u,
+ 0xD900u, 0x2B49u, 0xB625u, 0x446Cu, 0x074Au, 0xF503u, 0x686Fu, 0x9A26u,
+ 0x8065u, 0x722Cu, 0xEF40u, 0x1D09u, 0x5E2Fu, 0xAC66u, 0x310Au, 0xC343u,
+ 0xB746u, 0x450Fu, 0xD863u, 0x2A2Au, 0x690Cu, 0x9B45u, 0x0629u, 0xF460u,
+ 0x655Eu, 0x9717u, 0x0A7Bu, 0xF832u, 0xBB14u, 0x495Du, 0xD431u, 0x2678u,
+ 0x527Du, 0xA034u, 0x3D58u, 0xCF11u, 0x8C37u, 0x7E7Eu, 0xE312u, 0x115Bu,
+ 0x0B18u, 0xF951u, 0x643Du, 0x9674u, 0xD552u, 0x271Bu, 0xBA77u, 0x483Eu,
+ 0x3C3Bu, 0xCE72u, 0x531Eu, 0xA157u, 0xE271u, 0x1038u, 0x8D54u, 0x7F1Du,
+ 0xB9D2u, 0x4B9Bu, 0xD6F7u, 0x24BEu, 0x6798u, 0x95D1u, 0x08BDu, 0xFAF4u,
+ 0x8EF1u, 0x7CB8u, 0xE1D4u, 0x139Du, 0x50BBu, 0xA2F2u, 0x3F9Eu, 0xCDD7u,
+ 0xD794u, 0x25DDu, 0xB8B1u, 0x4AF8u, 0x09DEu, 0xFB97u, 0x66FBu, 0x94B2u,
+ 0xE0B7u, 0x12FEu, 0x8F92u, 0x7DDBu, 0x3EFDu, 0xCCB4u, 0x51D8u, 0xA391u,
+ 0x57F1u, 0xA5B8u, 0x38D4u, 0xCA9Du, 0x89BBu, 0x7BF2u, 0xE69Eu, 0x14D7u,
+ 0x60D2u, 0x929Bu, 0x0FF7u, 0xFDBEu, 0xBE98u, 0x4CD1u, 0xD1BDu, 0x23F4u,
+ 0x39B7u, 0xCBFEu, 0x5692u, 0xA4DBu, 0xE7FDu, 0x15B4u, 0x88D8u, 0x7A91u,
+ 0x0E94u, 0xFCDDu, 0x61B1u, 0x93F8u, 0xD0DEu, 0x2297u, 0xBFFBu, 0x4DB2u,
+ 0x8B7Du, 0x7934u, 0xE458u, 0x1611u, 0x5537u, 0xA77Eu, 0x3A12u, 0xC85Bu,
+ 0xBC5Eu, 0x4E17u, 0xD37Bu, 0x2132u, 0x6214u, 0x905Du, 0x0D31u, 0xFF78u,
+ 0xE53Bu, 0x1772u, 0x8A1Eu, 0x7857u, 0x3B71u, 0xC938u, 0x5454u, 0xA61Du,
+ 0xD218u, 0x2051u, 0xBD3Du, 0x4F74u, 0x0C52u, 0xFE1Bu, 0x6377u, 0x913Eu
+ },
+ {
+ 0x0000u, 0xCABCu, 0x1ECFu, 0xD473u, 0x3D9Eu, 0xF722u, 0x2351u, 0xE9EDu,
+ 0x7B3Cu, 0xB180u, 0x65F3u, 0xAF4Fu, 0x46A2u, 0x8C1Eu, 0x586Du, 0x92D1u,
+ 0xF678u, 0x3CC4u, 0xE8B7u, 0x220Bu, 0xCBE6u, 0x015Au, 0xD529u, 0x1F95u,
+ 0x8D44u, 0x47F8u, 0x938Bu, 0x5937u, 0xB0DAu, 0x7A66u, 0xAE15u, 0x64A9u,
+ 0x6747u, 0xADFBu, 0x7988u, 0xB334u, 0x5AD9u, 0x9065u, 0x4416u, 0x8EAAu,
+ 0x1C7Bu, 0xD6C7u, 0x02B4u, 0xC808u, 0x21E5u, 0xEB59u, 0x3F2Au, 0xF596u,
+ 0x913Fu, 0x5B83u, 0x8FF0u, 0x454Cu, 0xACA1u, 0x661Du, 0xB26Eu, 0x78D2u,
+ 0xEA03u, 0x20BFu, 0xF4CCu, 0x3E70u, 0xD79Du, 0x1D21u, 0xC952u, 0x03EEu,
+ 0xCE8Eu, 0x0432u, 0xD041u, 0x1AFDu, 0xF310u, 0x39ACu, 0xEDDFu, 0x2763u,
+ 0xB5B2u, 0x7F0Eu, 0xAB7Du, 0x61C1u, 0x882Cu, 0x4290u, 0x96E3u, 0x5C5Fu,
+ 0x38F6u, 0xF24Au, 0x2639u, 0xEC85u, 0x0568u, 0xCFD4u, 0x1BA7u, 0xD11Bu,
+ 0x43CAu, 0x8976u, 0x5D05u, 0x97B9u, 0x7E54u, 0xB4E8u, 0x609Bu, 0xAA27u,
+ 0xA9C9u, 0x6375u, 0xB706u, 0x7DBAu, 0x9457u, 0x5EEBu, 0x8A98u, 0x4024u,
+ 0xD2F5u, 0x1849u, 0xCC3Au, 0x0686u, 0xEF6Bu, 0x25D7u, 0xF1A4u, 0x3B18u,
+ 0x5FB1u, 0x950Du, 0x417Eu, 0x8BC2u, 0x622Fu, 0xA893u, 0x7CE0u, 0xB65Cu,
+ 0x248Du, 0xEE31u, 0x3A42u, 0xF0FEu, 0x1913u, 0xD3AFu, 0x07DCu, 0xCD60u,
+ 0x16ABu, 0xDC17u, 0x0864u, 0xC2D8u, 0x2B35u, 0xE189u, 0x35FAu, 0xFF46u,
+ 0x6D97u, 0xA72Bu, 0x7358u, 0xB9E4u, 0x5009u, 0x9AB5u, 0x4EC6u, 0x847Au,
+ 0xE0D3u, 0x2A6Fu, 0xFE1Cu, 0x34A0u, 0xDD4Du, 0x17F1u, 0xC382u, 0x093Eu,
+ 0x9BEFu, 0x5153u, 0x8520u, 0x4F9Cu, 0xA671u, 0x6CCDu, 0xB8BEu, 0x7202u,
+ 0x71ECu, 0xBB50u, 0x6F23u, 0xA59Fu, 0x4C72u, 0x86CEu, 0x52BDu, 0x9801u,
+ 0x0AD0u, 0xC06Cu, 0x141Fu, 0xDEA3u, 0x374Eu, 0xFDF2u, 0x2981u, 0xE33Du,
+ 0x8794u, 0x4D28u, 0x995Bu, 0x53E7u, 0xBA0Au, 0x70B6u, 0xA4C5u, 0x6E79u,
+ 0xFCA8u, 0x3614u, 0xE267u, 0x28DBu, 0xC136u, 0x0B8Au, 0xDFF9u, 0x1545u,
+ 0xD825u, 0x1299u, 0xC6EAu, 0x0C56u, 0xE5BBu, 0x2F07u, 0xFB74u, 0x31C8u,
+ 0xA319u, 0x69A5u, 0xBDD6u, 0x776Au, 0x9E87u, 0x543Bu, 0x8048u, 0x4AF4u,
+ 0x2E5Du, 0xE4E1u, 0x3092u, 0xFA2Eu, 0x13C3u, 0xD97Fu, 0x0D0Cu, 0xC7B0u,
+ 0x5561u, 0x9FDDu, 0x4BAEu, 0x8112u, 0x68FFu, 0xA243u, 0x7630u, 0xBC8Cu,
+ 0xBF62u, 0x75DEu, 0xA1ADu, 0x6B11u, 0x82FCu, 0x4840u, 0x9C33u, 0x568Fu,
+ 0xC45Eu, 0x0EE2u, 0xDA91u, 0x102Du, 0xF9C0u, 0x337Cu, 0xE70Fu, 0x2DB3u,
+ 0x491Au, 0x83A6u, 0x57D5u, 0x9D69u, 0x7484u, 0xBE38u, 0x6A4Bu, 0xA0F7u,
+ 0x3226u, 0xF89Au, 0x2CE9u, 0xE655u, 0x0FB8u, 0xC504u, 0x1177u, 0xDBCBu
+ },
+ {
+ 0x0000u, 0x2D56u, 0x5AACu, 0x77FAu, 0xB558u, 0x980Eu, 0xEFF4u, 0xC2A2u,
+ 0xE107u, 0xCC51u, 0xBBABu, 0x96FDu, 0x545Fu, 0x7909u, 0x0EF3u, 0x23A5u,
+ 0x49B9u, 0x64EFu, 0x1315u, 0x3E43u, 0xFCE1u, 0xD1B7u, 0xA64Du, 0x8B1Bu,
+ 0xA8BEu, 0x85E8u, 0xF212u, 0xDF44u, 0x1DE6u, 0x30B0u, 0x474Au, 0x6A1Cu,
+ 0x9372u, 0xBE24u, 0xC9DEu, 0xE488u, 0x262Au, 0x0B7Cu, 0x7C86u, 0x51D0u,
+ 0x7275u, 0x5F23u, 0x28D9u, 0x058Fu, 0xC72Du, 0xEA7Bu, 0x9D81u, 0xB0D7u,
+ 0xDACBu, 0xF79Du, 0x8067u, 0xAD31u, 0x6F93u, 0x42C5u, 0x353Fu, 0x1869u,
+ 0x3BCCu, 0x169Au, 0x6160u, 0x4C36u, 0x8E94u, 0xA3C2u, 0xD438u, 0xF96Eu,
+ 0xAD53u, 0x8005u, 0xF7FFu, 0xDAA9u, 0x180Bu, 0x355Du, 0x42A7u, 0x6FF1u,
+ 0x4C54u, 0x6102u, 0x16F8u, 0x3BAEu, 0xF90Cu, 0xD45Au, 0xA3A0u, 0x8EF6u,
+ 0xE4EAu, 0xC9BCu, 0xBE46u, 0x9310u, 0x51B2u, 0x7CE4u, 0x0B1Eu, 0x2648u,
+ 0x05EDu, 0x28BBu, 0x5F41u, 0x7217u, 0xB0B5u, 0x9DE3u, 0xEA19u, 0xC74Fu,
+ 0x3E21u, 0x1377u, 0x648Du, 0x49DBu, 0x8B79u, 0xA62Fu, 0xD1D5u, 0xFC83u,
+ 0xDF26u, 0xF270u, 0x858Au, 0xA8DCu, 0x6A7Eu, 0x4728u, 0x30D2u, 0x1D84u,
+ 0x7798u, 0x5ACEu, 0x2D34u, 0x0062u, 0xC2C0u, 0xEF96u, 0x986Cu, 0xB53Au,
+ 0x969Fu, 0xBBC9u, 0xCC33u, 0xE165u, 0x23C7u, 0x0E91u, 0x796Bu, 0x543Du,
+ 0xD111u, 0xFC47u, 0x8BBDu, 0xA6EBu, 0x6449u, 0x491Fu, 0x3EE5u, 0x13B3u,
+ 0x3016u, 0x1D40u, 0x6ABAu, 0x47ECu, 0x854Eu, 0xA818u, 0xDFE2u, 0xF2B4u,
+ 0x98A8u, 0xB5FEu, 0xC204u, 0xEF52u, 0x2DF0u, 0x00A6u, 0x775Cu, 0x5A0Au,
+ 0x79AFu, 0x54F9u, 0x2303u, 0x0E55u, 0xCCF7u, 0xE1A1u, 0x965Bu, 0xBB0Du,
+ 0x4263u, 0x6F35u, 0x18CFu, 0x3599u, 0xF73Bu, 0xDA6Du, 0xAD97u, 0x80C1u,
+ 0xA364u, 0x8E32u, 0xF9C8u, 0xD49Eu, 0x163Cu, 0x3B6Au, 0x4C90u, 0x61C6u,
+ 0x0BDAu, 0x268Cu, 0x5176u, 0x7C20u, 0xBE82u, 0x93D4u, 0xE42Eu, 0xC978u,
+ 0xEADDu, 0xC78Bu, 0xB071u, 0x9D27u, 0x5F85u, 0x72D3u, 0x0529u, 0x287Fu,
+ 0x7C42u, 0x5114u, 0x26EEu, 0x0BB8u, 0xC91Au, 0xE44Cu, 0x93B6u, 0xBEE0u,
+ 0x9D45u, 0xB013u, 0xC7E9u, 0xEABFu, 0x281Du, 0x054Bu, 0x72B1u, 0x5FE7u,
+ 0x35FBu, 0x18ADu, 0x6F57u, 0x4201u, 0x80A3u, 0xADF5u, 0xDA0Fu, 0xF759u,
+ 0xD4FCu, 0xF9AAu, 0x8E50u, 0xA306u, 0x61A4u, 0x4CF2u, 0x3B08u, 0x165Eu,
+ 0xEF30u, 0xC266u, 0xB59Cu, 0x98CAu, 0x5A68u, 0x773Eu, 0x00C4u, 0x2D92u,
+ 0x0E37u, 0x2361u, 0x549Bu, 0x79CDu, 0xBB6Fu, 0x9639u, 0xE1C3u, 0xCC95u,
+ 0xA689u, 0x8BDFu, 0xFC25u, 0xD173u, 0x13D1u, 0x3E87u, 0x497Du, 0x642Bu,
+ 0x478Eu, 0x6AD8u, 0x1D22u, 0x3074u, 0xF2D6u, 0xDF80u, 0xA87Au, 0x852Cu
+ },
+ {
+ 0x0000u, 0x2995u, 0x532Au, 0x7ABFu, 0xA654u, 0x8FC1u, 0xF57Eu, 0xDCEBu,
+ 0xC71Fu, 0xEE8Au, 0x9435u, 0xBDA0u, 0x614Bu, 0x48DEu, 0x3261u, 0x1BF4u,
+ 0x0589u, 0x2C1Cu, 0x56A3u, 0x7F36u, 0xA3DDu, 0x8A48u, 0xF0F7u, 0xD962u,
+ 0xC296u, 0xEB03u, 0x91BCu, 0xB829u, 0x64C2u, 0x4D57u, 0x37E8u, 0x1E7Du,
+ 0x0B12u, 0x2287u, 0x5838u, 0x71ADu, 0xAD46u, 0x84D3u, 0xFE6Cu, 0xD7F9u,
+ 0xCC0Du, 0xE598u, 0x9F27u, 0xB6B2u, 0x6A59u, 0x43CCu, 0x3973u, 0x10E6u,
+ 0x0E9Bu, 0x270Eu, 0x5DB1u, 0x7424u, 0xA8CFu, 0x815Au, 0xFBE5u, 0xD270u,
+ 0xC984u, 0xE011u, 0x9AAEu, 0xB33Bu, 0x6FD0u, 0x4645u, 0x3CFAu, 0x156Fu,
+ 0x1624u, 0x3FB1u, 0x450Eu, 0x6C9Bu, 0xB070u, 0x99E5u, 0xE35Au, 0xCACFu,
+ 0xD13Bu, 0xF8AEu, 0x8211u, 0xAB84u, 0x776Fu, 0x5EFAu, 0x2445u, 0x0DD0u,
+ 0x13ADu, 0x3A38u, 0x4087u, 0x6912u, 0xB5F9u, 0x9C6Cu, 0xE6D3u, 0xCF46u,
+ 0xD4B2u, 0xFD27u, 0x8798u, 0xAE0Du, 0x72E6u, 0x5B73u, 0x21CCu, 0x0859u,
+ 0x1D36u, 0x34A3u, 0x4E1Cu, 0x6789u, 0xBB62u, 0x92F7u, 0xE848u, 0xC1DDu,
+ 0xDA29u, 0xF3BCu, 0x8903u, 0xA096u, 0x7C7Du, 0x55E8u, 0x2F57u, 0x06C2u,
+ 0x18BFu, 0x312Au, 0x4B95u, 0x6200u, 0xBEEBu, 0x977Eu, 0xEDC1u, 0xC454u,
+ 0xDFA0u, 0xF635u, 0x8C8Au, 0xA51Fu, 0x79F4u, 0x5061u, 0x2ADEu, 0x034Bu,
+ 0x2C48u, 0x05DDu, 0x7F62u, 0x56F7u, 0x8A1Cu, 0xA389u, 0xD936u, 0xF0A3u,
+ 0xEB57u, 0xC2C2u, 0xB87Du, 0x91E8u, 0x4D03u, 0x6496u, 0x1E29u, 0x37BCu,
+ 0x29C1u, 0x0054u, 0x7AEBu, 0x537Eu, 0x8F95u, 0xA600u, 0xDCBFu, 0xF52Au,
+ 0xEEDEu, 0xC74Bu, 0xBDF4u, 0x9461u, 0x488Au, 0x611Fu, 0x1BA0u, 0x3235u,
+ 0x275Au, 0x0ECFu, 0x7470u, 0x5DE5u, 0x810Eu, 0xA89Bu, 0xD224u, 0xFBB1u,
+ 0xE045u, 0xC9D0u, 0xB36Fu, 0x9AFAu, 0x4611u, 0x6F84u, 0x153Bu, 0x3CAEu,
+ 0x22D3u, 0x0B46u, 0x71F9u, 0x586Cu, 0x8487u, 0xAD12u, 0xD7ADu, 0xFE38u,
+ 0xE5CCu, 0xCC59u, 0xB6E6u, 0x9F73u, 0x4398u, 0x6A0Du, 0x10B2u, 0x3927u,
+ 0x3A6Cu, 0x13F9u, 0x6946u, 0x40D3u, 0x9C38u, 0xB5ADu, 0xCF12u, 0xE687u,
+ 0xFD73u, 0xD4E6u, 0xAE59u, 0x87CCu, 0x5B27u, 0x72B2u, 0x080Du, 0x2198u,
+ 0x3FE5u, 0x1670u, 0x6CCFu, 0x455Au, 0x99B1u, 0xB024u, 0xCA9Bu, 0xE30Eu,
+ 0xF8FAu, 0xD16Fu, 0xABD0u, 0x8245u, 0x5EAEu, 0x773Bu, 0x0D84u, 0x2411u,
+ 0x317Eu, 0x18EBu, 0x6254u, 0x4BC1u, 0x972Au, 0xBEBFu, 0xC400u, 0xED95u,
+ 0xF661u, 0xDFF4u, 0xA54Bu, 0x8CDEu, 0x5035u, 0x79A0u, 0x031Fu, 0x2A8Au,
+ 0x34F7u, 0x1D62u, 0x67DDu, 0x4E48u, 0x92A3u, 0xBB36u, 0xC189u, 0xE81Cu,
+ 0xF3E8u, 0xDA7Du, 0xA0C2u, 0x8957u, 0x55BCu, 0x7C29u, 0x0696u, 0x2F03u
+ },
+ {
+ 0x0000u, 0x5890u, 0xB120u, 0xE9B0u, 0xE9F7u, 0xB167u, 0x58D7u, 0x0047u,
+ 0x5859u, 0x00C9u, 0xE979u, 0xB1E9u, 0xB1AEu, 0xE93Eu, 0x008Eu, 0x581Eu,
+ 0xB0B2u, 0xE822u, 0x0192u, 0x5902u, 0x5945u, 0x01D5u, 0xE865u, 0xB0F5u,
+ 0xE8EBu, 0xB07Bu, 0x59CBu, 0x015Bu, 0x011Cu, 0x598Cu, 0xB03Cu, 0xE8ACu,
+ 0xEAD3u, 0xB243u, 0x5BF3u, 0x0363u, 0x0324u, 0x5BB4u, 0xB204u, 0xEA94u,
+ 0xB28Au, 0xEA1Au, 0x03AAu, 0x5B3Au, 0x5B7Du, 0x03EDu, 0xEA5Du, 0xB2CDu,
+ 0x5A61u, 0x02F1u, 0xEB41u, 0xB3D1u, 0xB396u, 0xEB06u, 0x02B6u, 0x5A26u,
+ 0x0238u, 0x5AA8u, 0xB318u, 0xEB88u, 0xEBCFu, 0xB35Fu, 0x5AEFu, 0x027Fu,
+ 0x5E11u, 0x0681u, 0xEF31u, 0xB7A1u, 0xB7E6u, 0xEF76u, 0x06C6u, 0x5E56u,
+ 0x0648u, 0x5ED8u, 0xB768u, 0xEFF8u, 0xEFBFu, 0xB72Fu, 0x5E9Fu, 0x060Fu,
+ 0xEEA3u, 0xB633u, 0x5F83u, 0x0713u, 0x0754u, 0x5FC4u, 0xB674u, 0xEEE4u,
+ 0xB6FAu, 0xEE6Au, 0x07DAu, 0x5F4Au, 0x5F0Du, 0x079Du, 0xEE2Du, 0xB6BDu,
+ 0xB4C2u, 0xEC52u, 0x05E2u, 0x5D72u, 0x5D35u, 0x05A5u, 0xEC15u, 0xB485u,
+ 0xEC9Bu, 0xB40Bu, 0x5DBBu, 0x052Bu, 0x056Cu, 0x5DFCu, 0xB44Cu, 0xECDCu,
+ 0x0470u, 0x5CE0u, 0xB550u, 0xEDC0u, 0xED87u, 0xB517u, 0x5CA7u, 0x0437u,
+ 0x5C29u, 0x04B9u, 0xED09u, 0xB599u, 0xB5DEu, 0xED4Eu, 0x04FEu, 0x5C6Eu,
+ 0xBC22u, 0xE4B2u, 0x0D02u, 0x5592u, 0x55D5u, 0x0D45u, 0xE4F5u, 0xBC65u,
+ 0xE47Bu, 0xBCEBu, 0x555Bu, 0x0DCBu, 0x0D8Cu, 0x551Cu, 0xBCACu, 0xE43Cu,
+ 0x0C90u, 0x5400u, 0xBDB0u, 0xE520u, 0xE567u, 0xBDF7u, 0x5447u, 0x0CD7u,
+ 0x54C9u, 0x0C59u, 0xE5E9u, 0xBD79u, 0xBD3Eu, 0xE5AEu, 0x0C1Eu, 0x548Eu,
+ 0x56F1u, 0x0E61u, 0xE7D1u, 0xBF41u, 0xBF06u, 0xE796u, 0x0E26u, 0x56B6u,
+ 0x0EA8u, 0x5638u, 0xBF88u, 0xE718u, 0xE75Fu, 0xBFCFu, 0x567Fu, 0x0EEFu,
+ 0xE643u, 0xBED3u, 0x5763u, 0x0FF3u, 0x0FB4u, 0x5724u, 0xBE94u, 0xE604u,
+ 0xBE1Au, 0xE68Au, 0x0F3Au, 0x57AAu, 0x57EDu, 0x0F7Du, 0xE6CDu, 0xBE5Du,
+ 0xE233u, 0xBAA3u, 0x5313u, 0x0B83u, 0x0BC4u, 0x5354u, 0xBAE4u, 0xE274u,
+ 0xBA6Au, 0xE2FAu, 0x0B4Au, 0x53DAu, 0x539Du, 0x0B0Du, 0xE2BDu, 0xBA2Du,
+ 0x5281u, 0x0A11u, 0xE3A1u, 0xBB31u, 0xBB76u, 0xE3E6u, 0x0A56u, 0x52C6u,
+ 0x0AD8u, 0x5248u, 0xBBF8u, 0xE368u, 0xE32Fu, 0xBBBFu, 0x520Fu, 0x0A9Fu,
+ 0x08E0u, 0x5070u, 0xB9C0u, 0xE150u, 0xE117u, 0xB987u, 0x5037u, 0x08A7u,
+ 0x50B9u, 0x0829u, 0xE199u, 0xB909u, 0xB94Eu, 0xE1DEu, 0x086Eu, 0x50FEu,
+ 0xB852u, 0xE0C2u, 0x0972u, 0x51E2u, 0x51A5u, 0x0935u, 0xE085u, 0xB815u,
+ 0xE00Bu, 0xB89Bu, 0x512Bu, 0x09BBu, 0x09FCu, 0x516Cu, 0xB8DCu, 0xE04Cu
+ },
+ {
+ 0x0000u, 0xF3F3u, 0x6C51u, 0x9FA2u, 0xD8A2u, 0x2B51u, 0xB4F3u, 0x4700u,
+ 0x3AF3u, 0xC900u, 0x56A2u, 0xA551u, 0xE251u, 0x11A2u, 0x8E00u, 0x7DF3u,
+ 0x75E6u, 0x8615u, 0x19B7u, 0xEA44u, 0xAD44u, 0x5EB7u, 0xC115u, 0x32E6u,
+ 0x4F15u, 0xBCE6u, 0x2344u, 0xD0B7u, 0x97B7u, 0x6444u, 0xFBE6u, 0x0815u,
+ 0xEBCCu, 0x183Fu, 0x879Du, 0x746Eu, 0x336Eu, 0xC09Du, 0x5F3Fu, 0xACCCu,
+ 0xD13Fu, 0x22CCu, 0xBD6Eu, 0x4E9Du, 0x099Du, 0xFA6Eu, 0x65CCu, 0x963Fu,
+ 0x9E2Au, 0x6DD9u, 0xF27Bu, 0x0188u, 0x4688u, 0xB57Bu, 0x2AD9u, 0xD92Au,
+ 0xA4D9u, 0x572Au, 0xC888u, 0x3B7Bu, 0x7C7Bu, 0x8F88u, 0x102Au, 0xE3D9u,
+ 0x5C2Fu, 0xAFDCu, 0x307Eu, 0xC38Du, 0x848Du, 0x777Eu, 0xE8DCu, 0x1B2Fu,
+ 0x66DCu, 0x952Fu, 0x0A8Du, 0xF97Eu, 0xBE7Eu, 0x4D8Du, 0xD22Fu, 0x21DCu,
+ 0x29C9u, 0xDA3Au, 0x4598u, 0xB66Bu, 0xF16Bu, 0x0298u, 0x9D3Au, 0x6EC9u,
+ 0x133Au, 0xE0C9u, 0x7F6Bu, 0x8C98u, 0xCB98u, 0x386Bu, 0xA7C9u, 0x543Au,
+ 0xB7E3u, 0x4410u, 0xDBB2u, 0x2841u, 0x6F41u, 0x9CB2u, 0x0310u, 0xF0E3u,
+ 0x8D10u, 0x7EE3u, 0xE141u, 0x12B2u, 0x55B2u, 0xA641u, 0x39E3u, 0xCA10u,
+ 0xC205u, 0x31F6u, 0xAE54u, 0x5DA7u, 0x1AA7u, 0xE954u, 0x76F6u, 0x8505u,
+ 0xF8F6u, 0x0B05u, 0x94A7u, 0x6754u, 0x2054u, 0xD3A7u, 0x4C05u, 0xBFF6u,
+ 0xB85Eu, 0x4BADu, 0xD40Fu, 0x27FCu, 0x60FCu, 0x930Fu, 0x0CADu, 0xFF5Eu,
+ 0x82ADu, 0x715Eu, 0xEEFCu, 0x1D0Fu, 0x5A0Fu, 0xA9FCu, 0x365Eu, 0xC5ADu,
+ 0xCDB8u, 0x3E4Bu, 0xA1E9u, 0x521Au, 0x151Au, 0xE6E9u, 0x794Bu, 0x8AB8u,
+ 0xF74Bu, 0x04B8u, 0x9B1Au, 0x68E9u, 0x2FE9u, 0xDC1Au, 0x43B8u, 0xB04Bu,
+ 0x5392u, 0xA061u, 0x3FC3u, 0xCC30u, 0x8B30u, 0x78C3u, 0xE761u, 0x1492u,
+ 0x6961u, 0x9A92u, 0x0530u, 0xF6C3u, 0xB1C3u, 0x4230u, 0xDD92u, 0x2E61u,
+ 0x2674u, 0xD587u, 0x4A25u, 0xB9D6u, 0xFED6u, 0x0D25u, 0x9287u, 0x6174u,
+ 0x1C87u, 0xEF74u, 0x70D6u, 0x8325u, 0xC425u, 0x37D6u, 0xA874u, 0x5B87u,
+ 0xE471u, 0x1782u, 0x8820u, 0x7BD3u, 0x3CD3u, 0xCF20u, 0x5082u, 0xA371u,
+ 0xDE82u, 0x2D71u, 0xB2D3u, 0x4120u, 0x0620u, 0xF5D3u, 0x6A71u, 0x9982u,
+ 0x9197u, 0x6264u, 0xFDC6u, 0x0E35u, 0x4935u, 0xBAC6u, 0x2564u, 0xD697u,
+ 0xAB64u, 0x5897u, 0xC735u, 0x34C6u, 0x73C6u, 0x8035u, 0x1F97u, 0xEC64u,
+ 0x0FBDu, 0xFC4Eu, 0x63ECu, 0x901Fu, 0xD71Fu, 0x24ECu, 0xBB4Eu, 0x48BDu,
+ 0x354Eu, 0xC6BDu, 0x591Fu, 0xAAECu, 0xEDECu, 0x1E1Fu, 0x81BDu, 0x724Eu,
+ 0x7A5Bu, 0x89A8u, 0x160Au, 0xE5F9u, 0xA2F9u, 0x510Au, 0xCEA8u, 0x3D5Bu,
+ 0x40A8u, 0xB35Bu, 0x2CF9u, 0xDF0Au, 0x980Au, 0x6BF9u, 0xF45Bu, 0x07A8u
+ },
+ {
+ 0x0000u, 0xFB0Bu, 0x7DA1u, 0x86AAu, 0xFB42u, 0x0049u, 0x86E3u, 0x7DE8u,
+ 0x7D33u, 0x8638u, 0x0092u, 0xFB99u, 0x8671u, 0x7D7Au, 0xFBD0u, 0x00DBu,
+ 0xFA66u, 0x016Du, 0x87C7u, 0x7CCCu, 0x0124u, 0xFA2Fu, 0x7C85u, 0x878Eu,
+ 0x8755u, 0x7C5Eu, 0xFAF4u, 0x01FFu, 0x7C17u, 0x871Cu, 0x01B6u, 0xFABDu,
+ 0x7F7Bu, 0x8470u, 0x02DAu, 0xF9D1u, 0x8439u, 0x7F32u, 0xF998u, 0x0293u,
+ 0x0248u, 0xF943u, 0x7FE9u, 0x84E2u, 0xF90Au, 0x0201u, 0x84ABu, 0x7FA0u,
+ 0x851Du, 0x7E16u, 0xF8BCu, 0x03B7u, 0x7E5Fu, 0x8554u, 0x03FEu, 0xF8F5u,
+ 0xF82Eu, 0x0325u, 0x858Fu, 0x7E84u, 0x036Cu, 0xF867u, 0x7ECDu, 0x85C6u,
+ 0xFEF6u, 0x05FDu, 0x8357u, 0x785Cu, 0x05B4u, 0xFEBFu, 0x7815u, 0x831Eu,
+ 0x83C5u, 0x78CEu, 0xFE64u, 0x056Fu, 0x7887u, 0x838Cu, 0x0526u, 0xFE2Du,
+ 0x0490u, 0xFF9Bu, 0x7931u, 0x823Au, 0xFFD2u, 0x04D9u, 0x8273u, 0x7978u,
+ 0x79A3u, 0x82A8u, 0x0402u, 0xFF09u, 0x82E1u, 0x79EAu, 0xFF40u, 0x044Bu,
+ 0x818Du, 0x7A86u, 0xFC2Cu, 0x0727u, 0x7ACFu, 0x81C4u, 0x076Eu, 0xFC65u,
+ 0xFCBEu, 0x07B5u, 0x811Fu, 0x7A14u, 0x07FCu, 0xFCF7u, 0x7A5Du, 0x8156u,
+ 0x7BEBu, 0x80E0u, 0x064Au, 0xFD41u, 0x80A9u, 0x7BA2u, 0xFD08u, 0x0603u,
+ 0x06D8u, 0xFDD3u, 0x7B79u, 0x8072u, 0xFD9Au, 0x0691u, 0x803Bu, 0x7B30u,
+ 0x765Bu, 0x8D50u, 0x0BFAu, 0xF0F1u, 0x8D19u, 0x7612u, 0xF0B8u, 0x0BB3u,
+ 0x0B68u, 0xF063u, 0x76C9u, 0x8DC2u, 0xF02Au, 0x0B21u, 0x8D8Bu, 0x7680u,
+ 0x8C3Du, 0x7736u, 0xF19Cu, 0x0A97u, 0x777Fu, 0x8C74u, 0x0ADEu, 0xF1D5u,
+ 0xF10Eu, 0x0A05u, 0x8CAFu, 0x77A4u, 0x0A4Cu, 0xF147u, 0x77EDu, 0x8CE6u,
+ 0x0920u, 0xF22Bu, 0x7481u, 0x8F8Au, 0xF262u, 0x0969u, 0x8FC3u, 0x74C8u,
+ 0x7413u, 0x8F18u, 0x09B2u, 0xF2B9u, 0x8F51u, 0x745Au, 0xF2F0u, 0x09FBu,
+ 0xF346u, 0x084Du, 0x8EE7u, 0x75ECu, 0x0804u, 0xF30Fu, 0x75A5u, 0x8EAEu,
+ 0x8E75u, 0x757Eu, 0xF3D4u, 0x08DFu, 0x7537u, 0x8E3Cu, 0x0896u, 0xF39Du,
+ 0x88ADu, 0x73A6u, 0xF50Cu, 0x0E07u, 0x73EFu, 0x88E4u, 0x0E4Eu, 0xF545u,
+ 0xF59Eu, 0x0E95u, 0x883Fu, 0x7334u, 0x0EDCu, 0xF5D7u, 0x737Du, 0x8876u,
+ 0x72CBu, 0x89C0u, 0x0F6Au, 0xF461u, 0x8989u, 0x7282u, 0xF428u, 0x0F23u,
+ 0x0FF8u, 0xF4F3u, 0x7259u, 0x8952u, 0xF4BAu, 0x0FB1u, 0x891Bu, 0x7210u,
+ 0xF7D6u, 0x0CDDu, 0x8A77u, 0x717Cu, 0x0C94u, 0xF79Fu, 0x7135u, 0x8A3Eu,
+ 0x8AE5u, 0x71EEu, 0xF744u, 0x0C4Fu, 0x71A7u, 0x8AACu, 0x0C06u, 0xF70Du,
+ 0x0DB0u, 0xF6BBu, 0x7011u, 0x8B1Au, 0xF6F2u, 0x0DF9u, 0x8B53u, 0x7058u,
+ 0x7083u, 0x8B88u, 0x0D22u, 0xF629u, 0x8BC1u, 0x70CAu, 0xF660u, 0x0D6Bu
+ },
+ {
+ 0x0000u, 0xECB6u, 0x52DBu, 0xBE6Du, 0xA5B6u, 0x4900u, 0xF76Du, 0x1BDBu,
+ 0xC0DBu, 0x2C6Du, 0x9200u, 0x7EB6u, 0x656Du, 0x89DBu, 0x37B6u, 0xDB00u,
+ 0x0A01u, 0xE6B7u, 0x58DAu, 0xB46Cu, 0xAFB7u, 0x4301u, 0xFD6Cu, 0x11DAu,
+ 0xCADAu, 0x266Cu, 0x9801u, 0x74B7u, 0x6F6Cu, 0x83DAu, 0x3DB7u, 0xD101u,
+ 0x1402u, 0xF8B4u, 0x46D9u, 0xAA6Fu, 0xB1B4u, 0x5D02u, 0xE36Fu, 0x0FD9u,
+ 0xD4D9u, 0x386Fu, 0x8602u, 0x6AB4u, 0x716Fu, 0x9DD9u, 0x23B4u, 0xCF02u,
+ 0x1E03u, 0xF2B5u, 0x4CD8u, 0xA06Eu, 0xBBB5u, 0x5703u, 0xE96Eu, 0x05D8u,
+ 0xDED8u, 0x326Eu, 0x8C03u, 0x60B5u, 0x7B6Eu, 0x97D8u, 0x29B5u, 0xC503u,
+ 0x2804u, 0xC4B2u, 0x7ADFu, 0x9669u, 0x8DB2u, 0x6104u, 0xDF69u, 0x33DFu,
+ 0xE8DFu, 0x0469u, 0xBA04u, 0x56B2u, 0x4D69u, 0xA1DFu, 0x1FB2u, 0xF304u,
+ 0x2205u, 0xCEB3u, 0x70DEu, 0x9C68u, 0x87B3u, 0x6B05u, 0xD568u, 0x39DEu,
+ 0xE2DEu, 0x0E68u, 0xB005u, 0x5CB3u, 0x4768u, 0xABDEu, 0x15B3u, 0xF905u,
+ 0x3C06u, 0xD0B0u, 0x6EDDu, 0x826Bu, 0x99B0u, 0x7506u, 0xCB6Bu, 0x27DDu,
+ 0xFCDDu, 0x106Bu, 0xAE06u, 0x42B0u, 0x596Bu, 0xB5DDu, 0x0BB0u, 0xE706u,
+ 0x3607u, 0xDAB1u, 0x64DCu, 0x886Au, 0x93B1u, 0x7F07u, 0xC16Au, 0x2DDCu,
+ 0xF6DCu, 0x1A6Au, 0xA407u, 0x48B1u, 0x536Au, 0xBFDCu, 0x01B1u, 0xED07u,
+ 0x5008u, 0xBCBEu, 0x02D3u, 0xEE65u, 0xF5BEu, 0x1908u, 0xA765u, 0x4BD3u,
+ 0x90D3u, 0x7C65u, 0xC208u, 0x2EBEu, 0x3565u, 0xD9D3u, 0x67BEu, 0x8B08u,
+ 0x5A09u, 0xB6BFu, 0x08D2u, 0xE464u, 0xFFBFu, 0x1309u, 0xAD64u, 0x41D2u,
+ 0x9AD2u, 0x7664u, 0xC809u, 0x24BFu, 0x3F64u, 0xD3D2u, 0x6DBFu, 0x8109u,
+ 0x440Au, 0xA8BCu, 0x16D1u, 0xFA67u, 0xE1BCu, 0x0D0Au, 0xB367u, 0x5FD1u,
+ 0x84D1u, 0x6867u, 0xD60Au, 0x3ABCu, 0x2167u, 0xCDD1u, 0x73BCu, 0x9F0Au,
+ 0x4E0Bu, 0xA2BDu, 0x1CD0u, 0xF066u, 0xEBBDu, 0x070Bu, 0xB966u, 0x55D0u,
+ 0x8ED0u, 0x6266u, 0xDC0Bu, 0x30BDu, 0x2B66u, 0xC7D0u, 0x79BDu, 0x950Bu,
+ 0x780Cu, 0x94BAu, 0x2AD7u, 0xC661u, 0xDDBAu, 0x310Cu, 0x8F61u, 0x63D7u,
+ 0xB8D7u, 0x5461u, 0xEA0Cu, 0x06BAu, 0x1D61u, 0xF1D7u, 0x4FBAu, 0xA30Cu,
+ 0x720Du, 0x9EBBu, 0x20D6u, 0xCC60u, 0xD7BBu, 0x3B0Du, 0x8560u, 0x69D6u,
+ 0xB2D6u, 0x5E60u, 0xE00Du, 0x0CBBu, 0x1760u, 0xFBD6u, 0x45BBu, 0xA90Du,
+ 0x6C0Eu, 0x80B8u, 0x3ED5u, 0xD263u, 0xC9B8u, 0x250Eu, 0x9B63u, 0x77D5u,
+ 0xACD5u, 0x4063u, 0xFE0Eu, 0x12B8u, 0x0963u, 0xE5D5u, 0x5BB8u, 0xB70Eu,
+ 0x660Fu, 0x8AB9u, 0x34D4u, 0xD862u, 0xC3B9u, 0x2F0Fu, 0x9162u, 0x7DD4u,
+ 0xA6D4u, 0x4A62u, 0xF40Fu, 0x18B9u, 0x0362u, 0xEFD4u, 0x51B9u, 0xBD0Fu
+ },
+ {
+ 0x0000u, 0xA010u, 0xCB97u, 0x6B87u, 0x1C99u, 0xBC89u, 0xD70Eu, 0x771Eu,
+ 0x3932u, 0x9922u, 0xF2A5u, 0x52B5u, 0x25ABu, 0x85BBu, 0xEE3Cu, 0x4E2Cu,
+ 0x7264u, 0xD274u, 0xB9F3u, 0x19E3u, 0x6EFDu, 0xCEEDu, 0xA56Au, 0x057Au,
+ 0x4B56u, 0xEB46u, 0x80C1u, 0x20D1u, 0x57CFu, 0xF7DFu, 0x9C58u, 0x3C48u,
+ 0xE4C8u, 0x44D8u, 0x2F5Fu, 0x8F4Fu, 0xF851u, 0x5841u, 0x33C6u, 0x93D6u,
+ 0xDDFAu, 0x7DEAu, 0x166Du, 0xB67Du, 0xC163u, 0x6173u, 0x0AF4u, 0xAAE4u,
+ 0x96ACu, 0x36BCu, 0x5D3Bu, 0xFD2Bu, 0x8A35u, 0x2A25u, 0x41A2u, 0xE1B2u,
+ 0xAF9Eu, 0x0F8Eu, 0x6409u, 0xC419u, 0xB307u, 0x1317u, 0x7890u, 0xD880u,
+ 0x4227u, 0xE237u, 0x89B0u, 0x29A0u, 0x5EBEu, 0xFEAEu, 0x9529u, 0x3539u,
+ 0x7B15u, 0xDB05u, 0xB082u, 0x1092u, 0x678Cu, 0xC79Cu, 0xAC1Bu, 0x0C0Bu,
+ 0x3043u, 0x9053u, 0xFBD4u, 0x5BC4u, 0x2CDAu, 0x8CCAu, 0xE74Du, 0x475Du,
+ 0x0971u, 0xA961u, 0xC2E6u, 0x62F6u, 0x15E8u, 0xB5F8u, 0xDE7Fu, 0x7E6Fu,
+ 0xA6EFu, 0x06FFu, 0x6D78u, 0xCD68u, 0xBA76u, 0x1A66u, 0x71E1u, 0xD1F1u,
+ 0x9FDDu, 0x3FCDu, 0x544Au, 0xF45Au, 0x8344u, 0x2354u, 0x48D3u, 0xE8C3u,
+ 0xD48Bu, 0x749Bu, 0x1F1Cu, 0xBF0Cu, 0xC812u, 0x6802u, 0x0385u, 0xA395u,
+ 0xEDB9u, 0x4DA9u, 0x262Eu, 0x863Eu, 0xF120u, 0x5130u, 0x3AB7u, 0x9AA7u,
+ 0x844Eu, 0x245Eu, 0x4FD9u, 0xEFC9u, 0x98D7u, 0x38C7u, 0x5340u, 0xF350u,
+ 0xBD7Cu, 0x1D6Cu, 0x76EBu, 0xD6FBu, 0xA1E5u, 0x01F5u, 0x6A72u, 0xCA62u,
+ 0xF62Au, 0x563Au, 0x3DBDu, 0x9DADu, 0xEAB3u, 0x4AA3u, 0x2124u, 0x8134u,
+ 0xCF18u, 0x6F08u, 0x048Fu, 0xA49Fu, 0xD381u, 0x7391u, 0x1816u, 0xB806u,
+ 0x6086u, 0xC096u, 0xAB11u, 0x0B01u, 0x7C1Fu, 0xDC0Fu, 0xB788u, 0x1798u,
+ 0x59B4u, 0xF9A4u, 0x9223u, 0x3233u, 0x452Du, 0xE53Du, 0x8EBAu, 0x2EAAu,
+ 0x12E2u, 0xB2F2u, 0xD975u, 0x7965u, 0x0E7Bu, 0xAE6Bu, 0xC5ECu, 0x65FCu,
+ 0x2BD0u, 0x8BC0u, 0xE047u, 0x4057u, 0x3749u, 0x9759u, 0xFCDEu, 0x5CCEu,
+ 0xC669u, 0x6679u, 0x0DFEu, 0xADEEu, 0xDAF0u, 0x7AE0u, 0x1167u, 0xB177u,
+ 0xFF5Bu, 0x5F4Bu, 0x34CCu, 0x94DCu, 0xE3C2u, 0x43D2u, 0x2855u, 0x8845u,
+ 0xB40Du, 0x141Du, 0x7F9Au, 0xDF8Au, 0xA894u, 0x0884u, 0x6303u, 0xC313u,
+ 0x8D3Fu, 0x2D2Fu, 0x46A8u, 0xE6B8u, 0x91A6u, 0x31B6u, 0x5A31u, 0xFA21u,
+ 0x22A1u, 0x82B1u, 0xE936u, 0x4926u, 0x3E38u, 0x9E28u, 0xF5AFu, 0x55BFu,
+ 0x1B93u, 0xBB83u, 0xD004u, 0x7014u, 0x070Au, 0xA71Au, 0xCC9Du, 0x6C8Du,
+ 0x50C5u, 0xF0D5u, 0x9B52u, 0x3B42u, 0x4C5Cu, 0xEC4Cu, 0x87CBu, 0x27DBu,
+ 0x69F7u, 0xC9E7u, 0xA260u, 0x0270u, 0x756Eu, 0xD57Eu, 0xBEF9u, 0x1EE9u
+ },
+ {
+ 0x0000u, 0x832Bu, 0x8DE1u, 0x0ECAu, 0x9075u, 0x135Eu, 0x1D94u, 0x9EBFu,
+ 0xAB5Du, 0x2876u, 0x26BCu, 0xA597u, 0x3B28u, 0xB803u, 0xB6C9u, 0x35E2u,
+ 0xDD0Du, 0x5E26u, 0x50ECu, 0xD3C7u, 0x4D78u, 0xCE53u, 0xC099u, 0x43B2u,
+ 0x7650u, 0xF57Bu, 0xFBB1u, 0x789Au, 0xE625u, 0x650Eu, 0x6BC4u, 0xE8EFu,
+ 0x31ADu, 0xB286u, 0xBC4Cu, 0x3F67u, 0xA1D8u, 0x22F3u, 0x2C39u, 0xAF12u,
+ 0x9AF0u, 0x19DBu, 0x1711u, 0x943Au, 0x0A85u, 0x89AEu, 0x8764u, 0x044Fu,
+ 0xECA0u, 0x6F8Bu, 0x6141u, 0xE26Au, 0x7CD5u, 0xFFFEu, 0xF134u, 0x721Fu,
+ 0x47FDu, 0xC4D6u, 0xCA1Cu, 0x4937u, 0xD788u, 0x54A3u, 0x5A69u, 0xD942u,
+ 0x635Au, 0xE071u, 0xEEBBu, 0x6D90u, 0xF32Fu, 0x7004u, 0x7ECEu, 0xFDE5u,
+ 0xC807u, 0x4B2Cu, 0x45E6u, 0xC6CDu, 0x5872u, 0xDB59u, 0xD593u, 0x56B8u,
+ 0xBE57u, 0x3D7Cu, 0x33B6u, 0xB09Du, 0x2E22u, 0xAD09u, 0xA3C3u, 0x20E8u,
+ 0x150Au, 0x9621u, 0x98EBu, 0x1BC0u, 0x857Fu, 0x0654u, 0x089Eu, 0x8BB5u,
+ 0x52F7u, 0xD1DCu, 0xDF16u, 0x5C3Du, 0xC282u, 0x41A9u, 0x4F63u, 0xCC48u,
+ 0xF9AAu, 0x7A81u, 0x744Bu, 0xF760u, 0x69DFu, 0xEAF4u, 0xE43Eu, 0x6715u,
+ 0x8FFAu, 0x0CD1u, 0x021Bu, 0x8130u, 0x1F8Fu, 0x9CA4u, 0x926Eu, 0x1145u,
+ 0x24A7u, 0xA78Cu, 0xA946u, 0x2A6Du, 0xB4D2u, 0x37F9u, 0x3933u, 0xBA18u,
+ 0xC6B4u, 0x459Fu, 0x4B55u, 0xC87Eu, 0x56C1u, 0xD5EAu, 0xDB20u, 0x580Bu,
+ 0x6DE9u, 0xEEC2u, 0xE008u, 0x6323u, 0xFD9Cu, 0x7EB7u, 0x707Du, 0xF356u,
+ 0x1BB9u, 0x9892u, 0x9658u, 0x1573u, 0x8BCCu, 0x08E7u, 0x062Du, 0x8506u,
+ 0xB0E4u, 0x33CFu, 0x3D05u, 0xBE2Eu, 0x2091u, 0xA3BAu, 0xAD70u, 0x2E5Bu,
+ 0xF719u, 0x7432u, 0x7AF8u, 0xF9D3u, 0x676Cu, 0xE447u, 0xEA8Du, 0x69A6u,
+ 0x5C44u, 0xDF6Fu, 0xD1A5u, 0x528Eu, 0xCC31u, 0x4F1Au, 0x41D0u, 0xC2FBu,
+ 0x2A14u, 0xA93Fu, 0xA7F5u, 0x24DEu, 0xBA61u, 0x394Au, 0x3780u, 0xB4ABu,
+ 0x8149u, 0x0262u, 0x0CA8u, 0x8F83u, 0x113Cu, 0x9217u, 0x9CDDu, 0x1FF6u,
+ 0xA5EEu, 0x26C5u, 0x280Fu, 0xAB24u, 0x359Bu, 0xB6B0u, 0xB87Au, 0x3B51u,
+ 0x0EB3u, 0x8D98u, 0x8352u, 0x0079u, 0x9EC6u, 0x1DEDu, 0x1327u, 0x900Cu,
+ 0x78E3u, 0xFBC8u, 0xF502u, 0x7629u, 0xE896u, 0x6BBDu, 0x6577u, 0xE65Cu,
+ 0xD3BEu, 0x5095u, 0x5E5Fu, 0xDD74u, 0x43CBu, 0xC0E0u, 0xCE2Au, 0x4D01u,
+ 0x9443u, 0x1768u, 0x19A2u, 0x9A89u, 0x0436u, 0x871Du, 0x89D7u, 0x0AFCu,
+ 0x3F1Eu, 0xBC35u, 0xB2FFu, 0x31D4u, 0xAF6Bu, 0x2C40u, 0x228Au, 0xA1A1u,
+ 0x494Eu, 0xCA65u, 0xC4AFu, 0x4784u, 0xD93Bu, 0x5A10u, 0x54DAu, 0xD7F1u,
+ 0xE213u, 0x6138u, 0x6FF2u, 0xECD9u, 0x7266u, 0xF14Du, 0xFF87u, 0x7CACu
+ }
};
__u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, size_t len)
{
- unsigned int i;
+ const __u8 *i = (const __u8 *)buffer;
+ const __u8 *i_end = i + len;
+ const __u8 *i_last16 = i + (len / 16 * 16);
Please change the above variable names to something meaningful.
- for (i = 0 ; i < len ; i++)
- crc = (crc << 8) ^ t10_dif_crc_table[((crc >> 8) ^ buffer[i]) & 0xff];
+ for (; i < i_last16; i += 16) {
Initialize loop variable in the for loop if possible, it makes code readable.
+ crc = t10_dif_crc_table[15][i[0] ^ (__u8)(crc >> 8)] ^
+ t10_dif_crc_table[14][i[1] ^ (__u8)(crc >> 0)] ^
Though in the original code it has complex array calculations, the new code involves another
arrary subscripts, it will be great if you can simplify the code.
+ t10_dif_crc_table[13][i[2]] ^
+ t10_dif_crc_table[12][i[3]] ^
+ t10_dif_crc_table[11][i[4]] ^
+ t10_dif_crc_table[10][i[5]] ^
+ t10_dif_crc_table[9][i[6]] ^
+ t10_dif_crc_table[8][i[7]] ^
+ t10_dif_crc_table[7][i[8]] ^
+ t10_dif_crc_table[6][i[9]] ^
+ t10_dif_crc_table[5][i[10]] ^
+ t10_dif_crc_table[4][i[11]] ^
+ t10_dif_crc_table[3][i[12]] ^
+ t10_dif_crc_table[2][i[13]] ^
+ t10_dif_crc_table[1][i[14]] ^
+ t10_dif_crc_table[0][i[15]];
Something doesn’t look right here. Given that above code seems to iterate through the entire array
t10_diff_crc_table[15…0][i[0…15]] why can’t we use another loop ? addition of another loop
with couple of switch cases will significantly simplify the code, use loop to calculate this quantity and
make code more readable, instead of hardcoding the loop 16 times.
Also do you have L1/L2/LLC I and D cache hit-miss statistics with new vs old code ?
+ }
+
+ for (; i < i_end; i++)
+ crc = t10_dif_crc_table[0][*i ^ (__u8)(crc >> 8)] ^ (crc << 8);
return crc;
}
--
1.8.3.1
From: Jeff Lien > Sent: 10 August 2018 20:12 > > This patch provides a performance improvement for the CRC16 calculations done in read/write > workloads using the T10 Type 1/2/3 guard field. For example, today with sequential write > workloads (one thread/CPU of IO) we consume 100% of the CPU because of the CRC16 computation > bottleneck. Today's block devices are considerably faster, but the CRC16 calculation prevents > folks from utilizing the throughput of such devices. To speed up this calculation and expose > the block device throughput, we slice the old single byte for loop into a 16 byte for loop, > with a larger CRC table to match. The result has shown 5x performance improvements on various > big endian and little endian systems running the 4.18.0 kernel version. > > FIO Sequential Write, 64K Block Size, Queue Depth 64 > BE Base Kernel: bw=201.5 MiB/s > BE Modified CRC Calc: bw=968.1 MiB/s > 4.80x performance improvement > > LE Base Kernel: bw=357 MiB/s > LE Modified CRC Calc: bw=1964 MiB/s > 5.51x performance improvement > > FIO Sequential Read, 64K Block Size, Queue Depth 64 > BE Base Kernel: bw=611.2 MiB/s > BE Modified CRC calc: bw=684.9 MiB/s > 1.12x performance improvement > > LE Base Kernel: bw=797 MiB/s > LE Modified CRC Calc: bw=2730 MiB/s > 3.42x performance improvement > > Reviewed-by: Dave Darrington <david.darrington@wdc.com> > Reviewed-by: Jeff Furlong <jeff.furlong@wdc.com> > Signed-off-by: Jeff Lien <jeff.lien@wdc.com> > --- > crypto/crct10dif_common.c | 605 +++++++++++++++++++++++++++++++++++++++++++--- > 1 file changed, 569 insertions(+), 36 deletions(-) > > diff --git a/crypto/crct10dif_common.c b/crypto/crct10dif_common.c > index b2fab36..40e1d6c 100644 > --- a/crypto/crct10dif_common.c > +++ b/crypto/crct10dif_common.c > @@ -32,47 +32,580 @@ > * x^16 + x^15 + x^11 + x^9 + x^8 + x^7 + x^5 + x^4 + x^2 + x + 1 > * gt: 0x8bb7 > */ > -static const __u16 t10_dif_crc_table[256] = { ... > + } > }; > > __u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, size_t len) > { > - unsigned int i; > + const __u8 *i = (const __u8 *)buffer; > + const __u8 *i_end = i + len; > + const __u8 *i_last16 = i + (len / 16 * 16); > > - for (i = 0 ; i < len ; i++) > - crc = (crc << 8) ^ t10_dif_crc_table[((crc >> 8) ^ buffer[i]) & 0xff]; > + for (; i < i_last16; i += 16) { > + crc = t10_dif_crc_table[15][i[0] ^ (__u8)(crc >> 8)] ^ > + t10_dif_crc_table[14][i[1] ^ (__u8)(crc >> 0)] ^ > + t10_dif_crc_table[13][i[2]] ^ > + t10_dif_crc_table[12][i[3]] ^ > + t10_dif_crc_table[11][i[4]] ^ > + t10_dif_crc_table[10][i[5]] ^ > + t10_dif_crc_table[9][i[6]] ^ > + t10_dif_crc_table[8][i[7]] ^ > + t10_dif_crc_table[7][i[8]] ^ > + t10_dif_crc_table[6][i[9]] ^ > + t10_dif_crc_table[5][i[10]] ^ > + t10_dif_crc_table[4][i[11]] ^ > + t10_dif_crc_table[3][i[12]] ^ > + t10_dif_crc_table[2][i[13]] ^ > + t10_dif_crc_table[1][i[14]] ^ > + t10_dif_crc_table[0][i[15]]; ... I suspect that all the gain comes from a slight relaxation of the register dependency chain and the loop unrolling. A more interesting version would be to generate the lookup table for a byte followed by 3 zero bytes. You could then run four separate register dependency chains using the same 256 entry lookup table. A little bit of work at the end of the buffer should sort it all out. There is also the lookup table free version: uint32_t crc_step(uint32_t crc, uint32_t byte_val) { uint32_t t = crc ^ (byte_val & 0xff); t = (t ^ t << 4) & 0xff; return crc >> 8 ^ t << 8 ^ t << 3 ^ t >> 4; } David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)
> A more interesting version would be to generate the lookup table > for a byte followed by 3 zero bytes. > You could then run four separate register dependency chains using the > same 256 entry lookup table. Not sure that works with a table lookup :-( David - Registered Address Lakeside, Bramley Road, Mount Farm, Milton Keynes, MK1 1PT, UK Registration No: 1397386 (Wales)
Joe, Doug, Nicolas, The CONFIG patch change suggested by Joe and Doug makes sense to do. I'll do some additional testing to verify the performance on my systems. Jeff Lien -----Original Message----- From: Joe Perches [mailto:joe@perches.com] Sent: Saturday, August 11, 2018 10:06 AM To: dgilbert@interlog.com; Nicolas Pitre <nicolas.pitre@linaro.org> Cc: Jeffrey Lien <Jeff.Lien@wdc.com>; linux-kernel@vger.kernel.org; linux-crypto@vger.kernel.org; linux-block@vger.kernel.org; linux-scsi@vger.kernel.org; herbert@gondor.apana.org.au; tim.c.chen@linux.intel.com; martin.petersen@oracle.com; David Darrington <david.darrington@wdc.com>; Jeff Furlong <jeff.furlong@wdc.com> Subject: Re: [PATCH] Performance Improvement in CRC16 Calculations. On Sat, 2018-08-11 at 02:04 -0700, Joe Perches wrote: > On Fri, 2018-08-10 at 22:39 -0400, Douglas Gilbert wrote: > > but below is a copy and paste of a table 27 from draft SBC-4 > > revision 15 in chapter 4.22.4.4 on page 87. > > The posted code returns the proper crc for each > CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE value from > 1 to 5 for these arrays. Jeff, could you please test the suggested patch with your comparison framework again with each CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE from 1 to 5? I get on a very limited test framework here: (runtime average of 10 runs) 1: 4.32 2: 1.86 3: 1.31 4: 1.05 5: 0.99
On 08/10/2018 12:12 PM, Jeff Lien wrote: > This patch provides a performance improvement for the CRC16 calculations done in read/write > workloads using the T10 Type 1/2/3 guard field. For example, today with sequential write > workloads (one thread/CPU of IO) we consume 100% of the CPU because of the CRC16 computation > bottleneck. Today's block devices are considerably faster, but the CRC16 calculation prevents > folks from utilizing the throughput of such devices. To speed up this calculation and expose > the block device throughput, we slice the old single byte for loop into a 16 byte for loop, > with a larger CRC table to match. The result has shown 5x performance improvements on various > big endian and little endian systems running the 4.18.0 kernel version. > > FIO Sequential Write, 64K Block Size, Queue Depth 64 > BE Base Kernel: bw=201.5 MiB/s > BE Modified CRC Calc: bw=968.1 MiB/s > 4.80x performance improvement > > LE Base Kernel: bw=357 MiB/s > LE Modified CRC Calc: bw=1964 MiB/s > 5.51x performance improvement > > FIO Sequential Read, 64K Block Size, Queue Depth 64 > BE Base Kernel: bw=611.2 MiB/s > BE Modified CRC calc: bw=684.9 MiB/s > 1.12x performance improvement > > LE Base Kernel: bw=797 MiB/s > LE Modified CRC Calc: bw=2730 MiB/s > 3.42x performance improvement > > Reviewed-by: Dave Darrington <david.darrington@wdc.com> > Reviewed-by: Jeff Furlong <jeff.furlong@wdc.com> > Signed-off-by: Jeff Lien <jeff.lien@wdc.com> > --- > crypto/crct10dif_common.c | 605 +++++++++++++++++++++++++++++++++++++++++++--- > 1 file changed, 569 insertions(+), 36 deletions(-) > > diff --git a/crypto/crct10dif_common.c b/crypto/crct10dif_common.c > index b2fab36..40e1d6c 100644 > --- a/crypto/crct10dif_common.c > +++ b/crypto/crct10dif_common.c > @@ -32,47 +32,580 @@ > * x^16 + x^15 + x^11 + x^9 + x^8 + x^7 + x^5 + x^4 + x^2 + x + 1 > * gt: 0x8bb7 > */ > -static const __u16 t10_dif_crc_table[256] = { > - 0x0000, 0x8BB7, 0x9CD9, 0x176E, 0xB205, 0x39B2, 0x2EDC, 0xA56B, > - 0xEFBD, 0x640A, 0x7364, 0xF8D3, 0x5DB8, 0xD60F, 0xC161, 0x4AD6, > - 0x54CD, 0xDF7A, 0xC814, 0x43A3, 0xE6C8, 0x6D7F, 0x7A11, 0xF1A6, > - 0xBB70, 0x30C7, 0x27A9, 0xAC1E, 0x0975, 0x82C2, 0x95AC, 0x1E1B, > - 0xA99A, 0x222D, 0x3543, 0xBEF4, 0x1B9F, 0x9028, 0x8746, 0x0CF1, > - 0x4627, 0xCD90, 0xDAFE, 0x5149, 0xF422, 0x7F95, 0x68FB, 0xE34C, > - 0xFD57, 0x76E0, 0x618E, 0xEA39, 0x4F52, 0xC4E5, 0xD38B, 0x583C, > - 0x12EA, 0x995D, 0x8E33, 0x0584, 0xA0EF, 0x2B58, 0x3C36, 0xB781, > - 0xD883, 0x5334, 0x445A, 0xCFED, 0x6A86, 0xE131, 0xF65F, 0x7DE8, > - 0x373E, 0xBC89, 0xABE7, 0x2050, 0x853B, 0x0E8C, 0x19E2, 0x9255, > - 0x8C4E, 0x07F9, 0x1097, 0x9B20, 0x3E4B, 0xB5FC, 0xA292, 0x2925, > - 0x63F3, 0xE844, 0xFF2A, 0x749D, 0xD1F6, 0x5A41, 0x4D2F, 0xC698, > - 0x7119, 0xFAAE, 0xEDC0, 0x6677, 0xC31C, 0x48AB, 0x5FC5, 0xD472, > - 0x9EA4, 0x1513, 0x027D, 0x89CA, 0x2CA1, 0xA716, 0xB078, 0x3BCF, > - 0x25D4, 0xAE63, 0xB90D, 0x32BA, 0x97D1, 0x1C66, 0x0B08, 0x80BF, > - 0xCA69, 0x41DE, 0x56B0, 0xDD07, 0x786C, 0xF3DB, 0xE4B5, 0x6F02, > - 0x3AB1, 0xB106, 0xA668, 0x2DDF, 0x88B4, 0x0303, 0x146D, 0x9FDA, > - 0xD50C, 0x5EBB, 0x49D5, 0xC262, 0x6709, 0xECBE, 0xFBD0, 0x7067, > - 0x6E7C, 0xE5CB, 0xF2A5, 0x7912, 0xDC79, 0x57CE, 0x40A0, 0xCB17, > - 0x81C1, 0x0A76, 0x1D18, 0x96AF, 0x33C4, 0xB873, 0xAF1D, 0x24AA, > - 0x932B, 0x189C, 0x0FF2, 0x8445, 0x212E, 0xAA99, 0xBDF7, 0x3640, > - 0x7C96, 0xF721, 0xE04F, 0x6BF8, 0xCE93, 0x4524, 0x524A, 0xD9FD, > - 0xC7E6, 0x4C51, 0x5B3F, 0xD088, 0x75E3, 0xFE54, 0xE93A, 0x628D, > - 0x285B, 0xA3EC, 0xB482, 0x3F35, 0x9A5E, 0x11E9, 0x0687, 0x8D30, > - 0xE232, 0x6985, 0x7EEB, 0xF55C, 0x5037, 0xDB80, 0xCCEE, 0x4759, > - 0x0D8F, 0x8638, 0x9156, 0x1AE1, 0xBF8A, 0x343D, 0x2353, 0xA8E4, > - 0xB6FF, 0x3D48, 0x2A26, 0xA191, 0x04FA, 0x8F4D, 0x9823, 0x1394, > - 0x5942, 0xD2F5, 0xC59B, 0x4E2C, 0xEB47, 0x60F0, 0x779E, 0xFC29, > - 0x4BA8, 0xC01F, 0xD771, 0x5CC6, 0xF9AD, 0x721A, 0x6574, 0xEEC3, > - 0xA415, 0x2FA2, 0x38CC, 0xB37B, 0x1610, 0x9DA7, 0x8AC9, 0x017E, > - 0x1F65, 0x94D2, 0x83BC, 0x080B, 0xAD60, 0x26D7, 0x31B9, 0xBA0E, > - 0xF0D8, 0x7B6F, 0x6C01, 0xE7B6, 0x42DD, 0xC96A, 0xDE04, 0x55B3 > +static const __u16 t10_dif_crc_table[16][256] = { > + { > + 0x0000u, 0x8BB7u, 0x9CD9u, 0x176Eu, 0xB205u, 0x39B2u, 0x2EDCu, 0xA56Bu, > + 0xEFBDu, 0x640Au, 0x7364u, 0xF8D3u, 0x5DB8u, 0xD60Fu, 0xC161u, 0x4AD6u, > + 0x54CDu, 0xDF7Au, 0xC814u, 0x43A3u, 0xE6C8u, 0x6D7Fu, 0x7A11u, 0xF1A6u, > + 0xBB70u, 0x30C7u, 0x27A9u, 0xAC1Eu, 0x0975u, 0x82C2u, 0x95ACu, 0x1E1Bu, > + 0xA99Au, 0x222Du, 0x3543u, 0xBEF4u, 0x1B9Fu, 0x9028u, 0x8746u, 0x0CF1u, > + 0x4627u, 0xCD90u, 0xDAFEu, 0x5149u, 0xF422u, 0x7F95u, 0x68FBu, 0xE34Cu, > + 0xFD57u, 0x76E0u, 0x618Eu, 0xEA39u, 0x4F52u, 0xC4E5u, 0xD38Bu, 0x583Cu, > + 0x12EAu, 0x995Du, 0x8E33u, 0x0584u, 0xA0EFu, 0x2B58u, 0x3C36u, 0xB781u, > + 0xD883u, 0x5334u, 0x445Au, 0xCFEDu, 0x6A86u, 0xE131u, 0xF65Fu, 0x7DE8u, > + 0x373Eu, 0xBC89u, 0xABE7u, 0x2050u, 0x853Bu, 0x0E8Cu, 0x19E2u, 0x9255u, > + 0x8C4Eu, 0x07F9u, 0x1097u, 0x9B20u, 0x3E4Bu, 0xB5FCu, 0xA292u, 0x2925u, > + 0x63F3u, 0xE844u, 0xFF2Au, 0x749Du, 0xD1F6u, 0x5A41u, 0x4D2Fu, 0xC698u, > + 0x7119u, 0xFAAEu, 0xEDC0u, 0x6677u, 0xC31Cu, 0x48ABu, 0x5FC5u, 0xD472u, > + 0x9EA4u, 0x1513u, 0x027Du, 0x89CAu, 0x2CA1u, 0xA716u, 0xB078u, 0x3BCFu, > + 0x25D4u, 0xAE63u, 0xB90Du, 0x32BAu, 0x97D1u, 0x1C66u, 0x0B08u, 0x80BFu, > + 0xCA69u, 0x41DEu, 0x56B0u, 0xDD07u, 0x786Cu, 0xF3DBu, 0xE4B5u, 0x6F02u, > + 0x3AB1u, 0xB106u, 0xA668u, 0x2DDFu, 0x88B4u, 0x0303u, 0x146Du, 0x9FDAu, > + 0xD50Cu, 0x5EBBu, 0x49D5u, 0xC262u, 0x6709u, 0xECBEu, 0xFBD0u, 0x7067u, > + 0x6E7Cu, 0xE5CBu, 0xF2A5u, 0x7912u, 0xDC79u, 0x57CEu, 0x40A0u, 0xCB17u, > + 0x81C1u, 0x0A76u, 0x1D18u, 0x96AFu, 0x33C4u, 0xB873u, 0xAF1Du, 0x24AAu, > + 0x932Bu, 0x189Cu, 0x0FF2u, 0x8445u, 0x212Eu, 0xAA99u, 0xBDF7u, 0x3640u, > + 0x7C96u, 0xF721u, 0xE04Fu, 0x6BF8u, 0xCE93u, 0x4524u, 0x524Au, 0xD9FDu, > + 0xC7E6u, 0x4C51u, 0x5B3Fu, 0xD088u, 0x75E3u, 0xFE54u, 0xE93Au, 0x628Du, > + 0x285Bu, 0xA3ECu, 0xB482u, 0x3F35u, 0x9A5Eu, 0x11E9u, 0x0687u, 0x8D30u, > + 0xE232u, 0x6985u, 0x7EEBu, 0xF55Cu, 0x5037u, 0xDB80u, 0xCCEEu, 0x4759u, > + 0x0D8Fu, 0x8638u, 0x9156u, 0x1AE1u, 0xBF8Au, 0x343Du, 0x2353u, 0xA8E4u, > + 0xB6FFu, 0x3D48u, 0x2A26u, 0xA191u, 0x04FAu, 0x8F4Du, 0x9823u, 0x1394u, > + 0x5942u, 0xD2F5u, 0xC59Bu, 0x4E2Cu, 0xEB47u, 0x60F0u, 0x779Eu, 0xFC29u, > + 0x4BA8u, 0xC01Fu, 0xD771u, 0x5CC6u, 0xF9ADu, 0x721Au, 0x6574u, 0xEEC3u, > + 0xA415u, 0x2FA2u, 0x38CCu, 0xB37Bu, 0x1610u, 0x9DA7u, 0x8AC9u, 0x017Eu, > + 0x1F65u, 0x94D2u, 0x83BCu, 0x080Bu, 0xAD60u, 0x26D7u, 0x31B9u, 0xBA0Eu, > + 0xF0D8u, 0x7B6Fu, 0x6C01u, 0xE7B6u, 0x42DDu, 0xC96Au, 0xDE04u, 0x55B3u > + }, > + { > + 0x0000u, 0x7562u, 0xEAC4u, 0x9FA6u, 0x5E3Fu, 0x2B5Du, 0xB4FBu, 0xC199u, > + 0xBC7Eu, 0xC91Cu, 0x56BAu, 0x23D8u, 0xE241u, 0x9723u, 0x0885u, 0x7DE7u, > + 0xF34Bu, 0x8629u, 0x198Fu, 0x6CEDu, 0xAD74u, 0xD816u, 0x47B0u, 0x32D2u, > + 0x4F35u, 0x3A57u, 0xA5F1u, 0xD093u, 0x110Au, 0x6468u, 0xFBCEu, 0x8EACu, > + 0x6D21u, 0x1843u, 0x87E5u, 0xF287u, 0x331Eu, 0x467Cu, 0xD9DAu, 0xACB8u, > + 0xD15Fu, 0xA43Du, 0x3B9Bu, 0x4EF9u, 0x8F60u, 0xFA02u, 0x65A4u, 0x10C6u, > + 0x9E6Au, 0xEB08u, 0x74AEu, 0x01CCu, 0xC055u, 0xB537u, 0x2A91u, 0x5FF3u, > + 0x2214u, 0x5776u, 0xC8D0u, 0xBDB2u, 0x7C2Bu, 0x0949u, 0x96EFu, 0xE38Du, > + 0xDA42u, 0xAF20u, 0x3086u, 0x45E4u, 0x847Du, 0xF11Fu, 0x6EB9u, 0x1BDBu, > + 0x663Cu, 0x135Eu, 0x8CF8u, 0xF99Au, 0x3803u, 0x4D61u, 0xD2C7u, 0xA7A5u, > + 0x2909u, 0x5C6Bu, 0xC3CDu, 0xB6AFu, 0x7736u, 0x0254u, 0x9DF2u, 0xE890u, > + 0x9577u, 0xE015u, 0x7FB3u, 0x0AD1u, 0xCB48u, 0xBE2Au, 0x218Cu, 0x54EEu, > + 0xB763u, 0xC201u, 0x5DA7u, 0x28C5u, 0xE95Cu, 0x9C3Eu, 0x0398u, 0x76FAu, > + 0x0B1Du, 0x7E7Fu, 0xE1D9u, 0x94BBu, 0x5522u, 0x2040u, 0xBFE6u, 0xCA84u, > + 0x4428u, 0x314Au, 0xAEECu, 0xDB8Eu, 0x1A17u, 0x6F75u, 0xF0D3u, 0x85B1u, > + 0xF856u, 0x8D34u, 0x1292u, 0x67F0u, 0xA669u, 0xD30Bu, 0x4CADu, 0x39CFu, > + 0x3F33u, 0x4A51u, 0xD5F7u, 0xA095u, 0x610Cu, 0x146Eu, 0x8BC8u, 0xFEAAu, > + 0x834Du, 0xF62Fu, 0x6989u, 0x1CEBu, 0xDD72u, 0xA810u, 0x37B6u, 0x42D4u, > + 0xCC78u, 0xB91Au, 0x26BCu, 0x53DEu, 0x9247u, 0xE725u, 0x7883u, 0x0DE1u, > + 0x7006u, 0x0564u, 0x9AC2u, 0xEFA0u, 0x2E39u, 0x5B5Bu, 0xC4FDu, 0xB19Fu, > + 0x5212u, 0x2770u, 0xB8D6u, 0xCDB4u, 0x0C2Du, 0x794Fu, 0xE6E9u, 0x938Bu, > + 0xEE6Cu, 0x9B0Eu, 0x04A8u, 0x71CAu, 0xB053u, 0xC531u, 0x5A97u, 0x2FF5u, > + 0xA159u, 0xD43Bu, 0x4B9Du, 0x3EFFu, 0xFF66u, 0x8A04u, 0x15A2u, 0x60C0u, > + 0x1D27u, 0x6845u, 0xF7E3u, 0x8281u, 0x4318u, 0x367Au, 0xA9DCu, 0xDCBEu, > + 0xE571u, 0x9013u, 0x0FB5u, 0x7AD7u, 0xBB4Eu, 0xCE2Cu, 0x518Au, 0x24E8u, > + 0x590Fu, 0x2C6Du, 0xB3CBu, 0xC6A9u, 0x0730u, 0x7252u, 0xEDF4u, 0x9896u, > + 0x163Au, 0x6358u, 0xFCFEu, 0x899Cu, 0x4805u, 0x3D67u, 0xA2C1u, 0xD7A3u, > + 0xAA44u, 0xDF26u, 0x4080u, 0x35E2u, 0xF47Bu, 0x8119u, 0x1EBFu, 0x6BDDu, > + 0x8850u, 0xFD32u, 0x6294u, 0x17F6u, 0xD66Fu, 0xA30Du, 0x3CABu, 0x49C9u, > + 0x342Eu, 0x414Cu, 0xDEEAu, 0xAB88u, 0x6A11u, 0x1F73u, 0x80D5u, 0xF5B7u, > + 0x7B1Bu, 0x0E79u, 0x91DFu, 0xE4BDu, 0x2524u, 0x5046u, 0xCFE0u, 0xBA82u, > + 0xC765u, 0xB207u, 0x2DA1u, 0x58C3u, 0x995Au, 0xEC38u, 0x739Eu, 0x06FCu > + }, > + { > + 0x0000u, 0x7E66u, 0xFCCCu, 0x82AAu, 0x722Fu, 0x0C49u, 0x8EE3u, 0xF085u, > + 0xE45Eu, 0x9A38u, 0x1892u, 0x66F4u, 0x9671u, 0xE817u, 0x6ABDu, 0x14DBu, > + 0x430Bu, 0x3D6Du, 0xBFC7u, 0xC1A1u, 0x3124u, 0x4F42u, 0xCDE8u, 0xB38Eu, > + 0xA755u, 0xD933u, 0x5B99u, 0x25FFu, 0xD57Au, 0xAB1Cu, 0x29B6u, 0x57D0u, > + 0x8616u, 0xF870u, 0x7ADAu, 0x04BCu, 0xF439u, 0x8A5Fu, 0x08F5u, 0x7693u, > + 0x6248u, 0x1C2Eu, 0x9E84u, 0xE0E2u, 0x1067u, 0x6E01u, 0xECABu, 0x92CDu, > + 0xC51Du, 0xBB7Bu, 0x39D1u, 0x47B7u, 0xB732u, 0xC954u, 0x4BFEu, 0x3598u, > + 0x2143u, 0x5F25u, 0xDD8Fu, 0xA3E9u, 0x536Cu, 0x2D0Au, 0xAFA0u, 0xD1C6u, > + 0x879Bu, 0xF9FDu, 0x7B57u, 0x0531u, 0xF5B4u, 0x8BD2u, 0x0978u, 0x771Eu, > + 0x63C5u, 0x1DA3u, 0x9F09u, 0xE16Fu, 0x11EAu, 0x6F8Cu, 0xED26u, 0x9340u, > + 0xC490u, 0xBAF6u, 0x385Cu, 0x463Au, 0xB6BFu, 0xC8D9u, 0x4A73u, 0x3415u, > + 0x20CEu, 0x5EA8u, 0xDC02u, 0xA264u, 0x52E1u, 0x2C87u, 0xAE2Du, 0xD04Bu, > + 0x018Du, 0x7FEBu, 0xFD41u, 0x8327u, 0x73A2u, 0x0DC4u, 0x8F6Eu, 0xF108u, > + 0xE5D3u, 0x9BB5u, 0x191Fu, 0x6779u, 0x97FCu, 0xE99Au, 0x6B30u, 0x1556u, > + 0x4286u, 0x3CE0u, 0xBE4Au, 0xC02Cu, 0x30A9u, 0x4ECFu, 0xCC65u, 0xB203u, > + 0xA6D8u, 0xD8BEu, 0x5A14u, 0x2472u, 0xD4F7u, 0xAA91u, 0x283Bu, 0x565Du, > + 0x8481u, 0xFAE7u, 0x784Du, 0x062Bu, 0xF6AEu, 0x88C8u, 0x0A62u, 0x7404u, > + 0x60DFu, 0x1EB9u, 0x9C13u, 0xE275u, 0x12F0u, 0x6C96u, 0xEE3Cu, 0x905Au, > + 0xC78Au, 0xB9ECu, 0x3B46u, 0x4520u, 0xB5A5u, 0xCBC3u, 0x4969u, 0x370Fu, > + 0x23D4u, 0x5DB2u, 0xDF18u, 0xA17Eu, 0x51FBu, 0x2F9Du, 0xAD37u, 0xD351u, > + 0x0297u, 0x7CF1u, 0xFE5Bu, 0x803Du, 0x70B8u, 0x0EDEu, 0x8C74u, 0xF212u, > + 0xE6C9u, 0x98AFu, 0x1A05u, 0x6463u, 0x94E6u, 0xEA80u, 0x682Au, 0x164Cu, > + 0x419Cu, 0x3FFAu, 0xBD50u, 0xC336u, 0x33B3u, 0x4DD5u, 0xCF7Fu, 0xB119u, > + 0xA5C2u, 0xDBA4u, 0x590Eu, 0x2768u, 0xD7EDu, 0xA98Bu, 0x2B21u, 0x5547u, > + 0x031Au, 0x7D7Cu, 0xFFD6u, 0x81B0u, 0x7135u, 0x0F53u, 0x8DF9u, 0xF39Fu, > + 0xE744u, 0x9922u, 0x1B88u, 0x65EEu, 0x956Bu, 0xEB0Du, 0x69A7u, 0x17C1u, > + 0x4011u, 0x3E77u, 0xBCDDu, 0xC2BBu, 0x323Eu, 0x4C58u, 0xCEF2u, 0xB094u, > + 0xA44Fu, 0xDA29u, 0x5883u, 0x26E5u, 0xD660u, 0xA806u, 0x2AACu, 0x54CAu, > + 0x850Cu, 0xFB6Au, 0x79C0u, 0x07A6u, 0xF723u, 0x8945u, 0x0BEFu, 0x7589u, > + 0x6152u, 0x1F34u, 0x9D9Eu, 0xE3F8u, 0x137Du, 0x6D1Bu, 0xEFB1u, 0x91D7u, > + 0xC607u, 0xB861u, 0x3ACBu, 0x44ADu, 0xB428u, 0xCA4Eu, 0x48E4u, 0x3682u, > + 0x2259u, 0x5C3Fu, 0xDE95u, 0xA0F3u, 0x5076u, 0x2E10u, 0xACBAu, 0xD2DCu > + }, > + { > + 0x0000u, 0x82B5u, 0x8EDDu, 0x0C68u, 0x960Du, 0x14B8u, 0x18D0u, 0x9A65u, > + 0xA7ADu, 0x2518u, 0x2970u, 0xABC5u, 0x31A0u, 0xB315u, 0xBF7Du, 0x3DC8u, > + 0xC4EDu, 0x4658u, 0x4A30u, 0xC885u, 0x52E0u, 0xD055u, 0xDC3Du, 0x5E88u, > + 0x6340u, 0xE1F5u, 0xED9Du, 0x6F28u, 0xF54Du, 0x77F8u, 0x7B90u, 0xF925u, > + 0x026Du, 0x80D8u, 0x8CB0u, 0x0E05u, 0x9460u, 0x16D5u, 0x1ABDu, 0x9808u, > + 0xA5C0u, 0x2775u, 0x2B1Du, 0xA9A8u, 0x33CDu, 0xB178u, 0xBD10u, 0x3FA5u, > + 0xC680u, 0x4435u, 0x485Du, 0xCAE8u, 0x508Du, 0xD238u, 0xDE50u, 0x5CE5u, > + 0x612Du, 0xE398u, 0xEFF0u, 0x6D45u, 0xF720u, 0x7595u, 0x79FDu, 0xFB48u, > + 0x04DAu, 0x866Fu, 0x8A07u, 0x08B2u, 0x92D7u, 0x1062u, 0x1C0Au, 0x9EBFu, > + 0xA377u, 0x21C2u, 0x2DAAu, 0xAF1Fu, 0x357Au, 0xB7CFu, 0xBBA7u, 0x3912u, > + 0xC037u, 0x4282u, 0x4EEAu, 0xCC5Fu, 0x563Au, 0xD48Fu, 0xD8E7u, 0x5A52u, > + 0x679Au, 0xE52Fu, 0xE947u, 0x6BF2u, 0xF197u, 0x7322u, 0x7F4Au, 0xFDFFu, > + 0x06B7u, 0x8402u, 0x886Au, 0x0ADFu, 0x90BAu, 0x120Fu, 0x1E67u, 0x9CD2u, > + 0xA11Au, 0x23AFu, 0x2FC7u, 0xAD72u, 0x3717u, 0xB5A2u, 0xB9CAu, 0x3B7Fu, > + 0xC25Au, 0x40EFu, 0x4C87u, 0xCE32u, 0x5457u, 0xD6E2u, 0xDA8Au, 0x583Fu, > + 0x65F7u, 0xE742u, 0xEB2Au, 0x699Fu, 0xF3FAu, 0x714Fu, 0x7D27u, 0xFF92u, > + 0x09B4u, 0x8B01u, 0x8769u, 0x05DCu, 0x9FB9u, 0x1D0Cu, 0x1164u, 0x93D1u, > + 0xAE19u, 0x2CACu, 0x20C4u, 0xA271u, 0x3814u, 0xBAA1u, 0xB6C9u, 0x347Cu, > + 0xCD59u, 0x4FECu, 0x4384u, 0xC131u, 0x5B54u, 0xD9E1u, 0xD589u, 0x573Cu, > + 0x6AF4u, 0xE841u, 0xE429u, 0x669Cu, 0xFCF9u, 0x7E4Cu, 0x7224u, 0xF091u, > + 0x0BD9u, 0x896Cu, 0x8504u, 0x07B1u, 0x9DD4u, 0x1F61u, 0x1309u, 0x91BCu, > + 0xAC74u, 0x2EC1u, 0x22A9u, 0xA01Cu, 0x3A79u, 0xB8CCu, 0xB4A4u, 0x3611u, > + 0xCF34u, 0x4D81u, 0x41E9u, 0xC35Cu, 0x5939u, 0xDB8Cu, 0xD7E4u, 0x5551u, > + 0x6899u, 0xEA2Cu, 0xE644u, 0x64F1u, 0xFE94u, 0x7C21u, 0x7049u, 0xF2FCu, > + 0x0D6Eu, 0x8FDBu, 0x83B3u, 0x0106u, 0x9B63u, 0x19D6u, 0x15BEu, 0x970Bu, > + 0xAAC3u, 0x2876u, 0x241Eu, 0xA6ABu, 0x3CCEu, 0xBE7Bu, 0xB213u, 0x30A6u, > + 0xC983u, 0x4B36u, 0x475Eu, 0xC5EBu, 0x5F8Eu, 0xDD3Bu, 0xD153u, 0x53E6u, > + 0x6E2Eu, 0xEC9Bu, 0xE0F3u, 0x6246u, 0xF823u, 0x7A96u, 0x76FEu, 0xF44Bu, > + 0x0F03u, 0x8DB6u, 0x81DEu, 0x036Bu, 0x990Eu, 0x1BBBu, 0x17D3u, 0x9566u, > + 0xA8AEu, 0x2A1Bu, 0x2673u, 0xA4C6u, 0x3EA3u, 0xBC16u, 0xB07Eu, 0x32CBu, > + 0xCBEEu, 0x495Bu, 0x4533u, 0xC786u, 0x5DE3u, 0xDF56u, 0xD33Eu, 0x518Bu, > + 0x6C43u, 0xEEF6u, 0xE29Eu, 0x602Bu, 0xFA4Eu, 0x78FBu, 0x7493u, 0xF626u > + }, > + { > + 0x0000u, 0x1368u, 0x26D0u, 0x35B8u, 0x4DA0u, 0x5EC8u, 0x6B70u, 0x7818u, > + 0x9B40u, 0x8828u, 0xBD90u, 0xAEF8u, 0xD6E0u, 0xC588u, 0xF030u, 0xE358u, > + 0xBD37u, 0xAE5Fu, 0x9BE7u, 0x888Fu, 0xF097u, 0xE3FFu, 0xD647u, 0xC52Fu, > + 0x2677u, 0x351Fu, 0x00A7u, 0x13CFu, 0x6BD7u, 0x78BFu, 0x4D07u, 0x5E6Fu, > + 0xF1D9u, 0xE2B1u, 0xD709u, 0xC461u, 0xBC79u, 0xAF11u, 0x9AA9u, 0x89C1u, > + 0x6A99u, 0x79F1u, 0x4C49u, 0x5F21u, 0x2739u, 0x3451u, 0x01E9u, 0x1281u, > + 0x4CEEu, 0x5F86u, 0x6A3Eu, 0x7956u, 0x014Eu, 0x1226u, 0x279Eu, 0x34F6u, > + 0xD7AEu, 0xC4C6u, 0xF17Eu, 0xE216u, 0x9A0Eu, 0x8966u, 0xBCDEu, 0xAFB6u, > + 0x6805u, 0x7B6Du, 0x4ED5u, 0x5DBDu, 0x25A5u, 0x36CDu, 0x0375u, 0x101Du, > + 0xF345u, 0xE02Du, 0xD595u, 0xC6FDu, 0xBEE5u, 0xAD8Du, 0x9835u, 0x8B5Du, > + 0xD532u, 0xC65Au, 0xF3E2u, 0xE08Au, 0x9892u, 0x8BFAu, 0xBE42u, 0xAD2Au, > + 0x4E72u, 0x5D1Au, 0x68A2u, 0x7BCAu, 0x03D2u, 0x10BAu, 0x2502u, 0x366Au, > + 0x99DCu, 0x8AB4u, 0xBF0Cu, 0xAC64u, 0xD47Cu, 0xC714u, 0xF2ACu, 0xE1C4u, > + 0x029Cu, 0x11F4u, 0x244Cu, 0x3724u, 0x4F3Cu, 0x5C54u, 0x69ECu, 0x7A84u, > + 0x24EBu, 0x3783u, 0x023Bu, 0x1153u, 0x694Bu, 0x7A23u, 0x4F9Bu, 0x5CF3u, > + 0xBFABu, 0xACC3u, 0x997Bu, 0x8A13u, 0xF20Bu, 0xE163u, 0xD4DBu, 0xC7B3u, > + 0xD00Au, 0xC362u, 0xF6DAu, 0xE5B2u, 0x9DAAu, 0x8EC2u, 0xBB7Au, 0xA812u, > + 0x4B4Au, 0x5822u, 0x6D9Au, 0x7EF2u, 0x06EAu, 0x1582u, 0x203Au, 0x3352u, > + 0x6D3Du, 0x7E55u, 0x4BEDu, 0x5885u, 0x209Du, 0x33F5u, 0x064Du, 0x1525u, > + 0xF67Du, 0xE515u, 0xD0ADu, 0xC3C5u, 0xBBDDu, 0xA8B5u, 0x9D0Du, 0x8E65u, > + 0x21D3u, 0x32BBu, 0x0703u, 0x146Bu, 0x6C73u, 0x7F1Bu, 0x4AA3u, 0x59CBu, > + 0xBA93u, 0xA9FBu, 0x9C43u, 0x8F2Bu, 0xF733u, 0xE45Bu, 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0x7D33u, 0x8638u, 0x0092u, 0xFB99u, 0x8671u, 0x7D7Au, 0xFBD0u, 0x00DBu, > + 0xFA66u, 0x016Du, 0x87C7u, 0x7CCCu, 0x0124u, 0xFA2Fu, 0x7C85u, 0x878Eu, > + 0x8755u, 0x7C5Eu, 0xFAF4u, 0x01FFu, 0x7C17u, 0x871Cu, 0x01B6u, 0xFABDu, > + 0x7F7Bu, 0x8470u, 0x02DAu, 0xF9D1u, 0x8439u, 0x7F32u, 0xF998u, 0x0293u, > + 0x0248u, 0xF943u, 0x7FE9u, 0x84E2u, 0xF90Au, 0x0201u, 0x84ABu, 0x7FA0u, > + 0x851Du, 0x7E16u, 0xF8BCu, 0x03B7u, 0x7E5Fu, 0x8554u, 0x03FEu, 0xF8F5u, > + 0xF82Eu, 0x0325u, 0x858Fu, 0x7E84u, 0x036Cu, 0xF867u, 0x7ECDu, 0x85C6u, > + 0xFEF6u, 0x05FDu, 0x8357u, 0x785Cu, 0x05B4u, 0xFEBFu, 0x7815u, 0x831Eu, > + 0x83C5u, 0x78CEu, 0xFE64u, 0x056Fu, 0x7887u, 0x838Cu, 0x0526u, 0xFE2Du, > + 0x0490u, 0xFF9Bu, 0x7931u, 0x823Au, 0xFFD2u, 0x04D9u, 0x8273u, 0x7978u, > + 0x79A3u, 0x82A8u, 0x0402u, 0xFF09u, 0x82E1u, 0x79EAu, 0xFF40u, 0x044Bu, > + 0x818Du, 0x7A86u, 0xFC2Cu, 0x0727u, 0x7ACFu, 0x81C4u, 0x076Eu, 0xFC65u, > + 0xFCBEu, 0x07B5u, 0x811Fu, 0x7A14u, 0x07FCu, 0xFCF7u, 0x7A5Du, 0x8156u, > + 0x7BEBu, 0x80E0u, 0x064Au, 0xFD41u, 0x80A9u, 0x7BA2u, 0xFD08u, 0x0603u, > + 0x06D8u, 0xFDD3u, 0x7B79u, 0x8072u, 0xFD9Au, 0x0691u, 0x803Bu, 0x7B30u, > + 0x765Bu, 0x8D50u, 0x0BFAu, 0xF0F1u, 0x8D19u, 0x7612u, 0xF0B8u, 0x0BB3u, > + 0x0B68u, 0xF063u, 0x76C9u, 0x8DC2u, 0xF02Au, 0x0B21u, 0x8D8Bu, 0x7680u, > + 0x8C3Du, 0x7736u, 0xF19Cu, 0x0A97u, 0x777Fu, 0x8C74u, 0x0ADEu, 0xF1D5u, > + 0xF10Eu, 0x0A05u, 0x8CAFu, 0x77A4u, 0x0A4Cu, 0xF147u, 0x77EDu, 0x8CE6u, > + 0x0920u, 0xF22Bu, 0x7481u, 0x8F8Au, 0xF262u, 0x0969u, 0x8FC3u, 0x74C8u, > + 0x7413u, 0x8F18u, 0x09B2u, 0xF2B9u, 0x8F51u, 0x745Au, 0xF2F0u, 0x09FBu, > + 0xF346u, 0x084Du, 0x8EE7u, 0x75ECu, 0x0804u, 0xF30Fu, 0x75A5u, 0x8EAEu, > + 0x8E75u, 0x757Eu, 0xF3D4u, 0x08DFu, 0x7537u, 0x8E3Cu, 0x0896u, 0xF39Du, > + 0x88ADu, 0x73A6u, 0xF50Cu, 0x0E07u, 0x73EFu, 0x88E4u, 0x0E4Eu, 0xF545u, > + 0xF59Eu, 0x0E95u, 0x883Fu, 0x7334u, 0x0EDCu, 0xF5D7u, 0x737Du, 0x8876u, > + 0x72CBu, 0x89C0u, 0x0F6Au, 0xF461u, 0x8989u, 0x7282u, 0xF428u, 0x0F23u, > + 0x0FF8u, 0xF4F3u, 0x7259u, 0x8952u, 0xF4BAu, 0x0FB1u, 0x891Bu, 0x7210u, > + 0xF7D6u, 0x0CDDu, 0x8A77u, 0x717Cu, 0x0C94u, 0xF79Fu, 0x7135u, 0x8A3Eu, > + 0x8AE5u, 0x71EEu, 0xF744u, 0x0C4Fu, 0x71A7u, 0x8AACu, 0x0C06u, 0xF70Du, > + 0x0DB0u, 0xF6BBu, 0x7011u, 0x8B1Au, 0xF6F2u, 0x0DF9u, 0x8B53u, 0x7058u, > + 0x7083u, 0x8B88u, 0x0D22u, 0xF629u, 0x8BC1u, 0x70CAu, 0xF660u, 0x0D6Bu > + }, > + { > + 0x0000u, 0xECB6u, 0x52DBu, 0xBE6Du, 0xA5B6u, 0x4900u, 0xF76Du, 0x1BDBu, > + 0xC0DBu, 0x2C6Du, 0x9200u, 0x7EB6u, 0x656Du, 0x89DBu, 0x37B6u, 0xDB00u, > + 0x0A01u, 0xE6B7u, 0x58DAu, 0xB46Cu, 0xAFB7u, 0x4301u, 0xFD6Cu, 0x11DAu, > + 0xCADAu, 0x266Cu, 0x9801u, 0x74B7u, 0x6F6Cu, 0x83DAu, 0x3DB7u, 0xD101u, > + 0x1402u, 0xF8B4u, 0x46D9u, 0xAA6Fu, 0xB1B4u, 0x5D02u, 0xE36Fu, 0x0FD9u, > + 0xD4D9u, 0x386Fu, 0x8602u, 0x6AB4u, 0x716Fu, 0x9DD9u, 0x23B4u, 0xCF02u, > + 0x1E03u, 0xF2B5u, 0x4CD8u, 0xA06Eu, 0xBBB5u, 0x5703u, 0xE96Eu, 0x05D8u, > + 0xDED8u, 0x326Eu, 0x8C03u, 0x60B5u, 0x7B6Eu, 0x97D8u, 0x29B5u, 0xC503u, > + 0x2804u, 0xC4B2u, 0x7ADFu, 0x9669u, 0x8DB2u, 0x6104u, 0xDF69u, 0x33DFu, > + 0xE8DFu, 0x0469u, 0xBA04u, 0x56B2u, 0x4D69u, 0xA1DFu, 0x1FB2u, 0xF304u, > + 0x2205u, 0xCEB3u, 0x70DEu, 0x9C68u, 0x87B3u, 0x6B05u, 0xD568u, 0x39DEu, > + 0xE2DEu, 0x0E68u, 0xB005u, 0x5CB3u, 0x4768u, 0xABDEu, 0x15B3u, 0xF905u, > + 0x3C06u, 0xD0B0u, 0x6EDDu, 0x826Bu, 0x99B0u, 0x7506u, 0xCB6Bu, 0x27DDu, > + 0xFCDDu, 0x106Bu, 0xAE06u, 0x42B0u, 0x596Bu, 0xB5DDu, 0x0BB0u, 0xE706u, > + 0x3607u, 0xDAB1u, 0x64DCu, 0x886Au, 0x93B1u, 0x7F07u, 0xC16Au, 0x2DDCu, > + 0xF6DCu, 0x1A6Au, 0xA407u, 0x48B1u, 0x536Au, 0xBFDCu, 0x01B1u, 0xED07u, > + 0x5008u, 0xBCBEu, 0x02D3u, 0xEE65u, 0xF5BEu, 0x1908u, 0xA765u, 0x4BD3u, > + 0x90D3u, 0x7C65u, 0xC208u, 0x2EBEu, 0x3565u, 0xD9D3u, 0x67BEu, 0x8B08u, > + 0x5A09u, 0xB6BFu, 0x08D2u, 0xE464u, 0xFFBFu, 0x1309u, 0xAD64u, 0x41D2u, > + 0x9AD2u, 0x7664u, 0xC809u, 0x24BFu, 0x3F64u, 0xD3D2u, 0x6DBFu, 0x8109u, > + 0x440Au, 0xA8BCu, 0x16D1u, 0xFA67u, 0xE1BCu, 0x0D0Au, 0xB367u, 0x5FD1u, > + 0x84D1u, 0x6867u, 0xD60Au, 0x3ABCu, 0x2167u, 0xCDD1u, 0x73BCu, 0x9F0Au, > + 0x4E0Bu, 0xA2BDu, 0x1CD0u, 0xF066u, 0xEBBDu, 0x070Bu, 0xB966u, 0x55D0u, > + 0x8ED0u, 0x6266u, 0xDC0Bu, 0x30BDu, 0x2B66u, 0xC7D0u, 0x79BDu, 0x950Bu, > + 0x780Cu, 0x94BAu, 0x2AD7u, 0xC661u, 0xDDBAu, 0x310Cu, 0x8F61u, 0x63D7u, > + 0xB8D7u, 0x5461u, 0xEA0Cu, 0x06BAu, 0x1D61u, 0xF1D7u, 0x4FBAu, 0xA30Cu, > + 0x720Du, 0x9EBBu, 0x20D6u, 0xCC60u, 0xD7BBu, 0x3B0Du, 0x8560u, 0x69D6u, > + 0xB2D6u, 0x5E60u, 0xE00Du, 0x0CBBu, 0x1760u, 0xFBD6u, 0x45BBu, 0xA90Du, > + 0x6C0Eu, 0x80B8u, 0x3ED5u, 0xD263u, 0xC9B8u, 0x250Eu, 0x9B63u, 0x77D5u, > + 0xACD5u, 0x4063u, 0xFE0Eu, 0x12B8u, 0x0963u, 0xE5D5u, 0x5BB8u, 0xB70Eu, > + 0x660Fu, 0x8AB9u, 0x34D4u, 0xD862u, 0xC3B9u, 0x2F0Fu, 0x9162u, 0x7DD4u, > + 0xA6D4u, 0x4A62u, 0xF40Fu, 0x18B9u, 0x0362u, 0xEFD4u, 0x51B9u, 0xBD0Fu > + }, > + { > + 0x0000u, 0xA010u, 0xCB97u, 0x6B87u, 0x1C99u, 0xBC89u, 0xD70Eu, 0x771Eu, > + 0x3932u, 0x9922u, 0xF2A5u, 0x52B5u, 0x25ABu, 0x85BBu, 0xEE3Cu, 0x4E2Cu, > + 0x7264u, 0xD274u, 0xB9F3u, 0x19E3u, 0x6EFDu, 0xCEEDu, 0xA56Au, 0x057Au, > + 0x4B56u, 0xEB46u, 0x80C1u, 0x20D1u, 0x57CFu, 0xF7DFu, 0x9C58u, 0x3C48u, > + 0xE4C8u, 0x44D8u, 0x2F5Fu, 0x8F4Fu, 0xF851u, 0x5841u, 0x33C6u, 0x93D6u, > + 0xDDFAu, 0x7DEAu, 0x166Du, 0xB67Du, 0xC163u, 0x6173u, 0x0AF4u, 0xAAE4u, > + 0x96ACu, 0x36BCu, 0x5D3Bu, 0xFD2Bu, 0x8A35u, 0x2A25u, 0x41A2u, 0xE1B2u, > + 0xAF9Eu, 0x0F8Eu, 0x6409u, 0xC419u, 0xB307u, 0x1317u, 0x7890u, 0xD880u, > + 0x4227u, 0xE237u, 0x89B0u, 0x29A0u, 0x5EBEu, 0xFEAEu, 0x9529u, 0x3539u, > + 0x7B15u, 0xDB05u, 0xB082u, 0x1092u, 0x678Cu, 0xC79Cu, 0xAC1Bu, 0x0C0Bu, > + 0x3043u, 0x9053u, 0xFBD4u, 0x5BC4u, 0x2CDAu, 0x8CCAu, 0xE74Du, 0x475Du, > + 0x0971u, 0xA961u, 0xC2E6u, 0x62F6u, 0x15E8u, 0xB5F8u, 0xDE7Fu, 0x7E6Fu, > + 0xA6EFu, 0x06FFu, 0x6D78u, 0xCD68u, 0xBA76u, 0x1A66u, 0x71E1u, 0xD1F1u, > + 0x9FDDu, 0x3FCDu, 0x544Au, 0xF45Au, 0x8344u, 0x2354u, 0x48D3u, 0xE8C3u, > + 0xD48Bu, 0x749Bu, 0x1F1Cu, 0xBF0Cu, 0xC812u, 0x6802u, 0x0385u, 0xA395u, > + 0xEDB9u, 0x4DA9u, 0x262Eu, 0x863Eu, 0xF120u, 0x5130u, 0x3AB7u, 0x9AA7u, > + 0x844Eu, 0x245Eu, 0x4FD9u, 0xEFC9u, 0x98D7u, 0x38C7u, 0x5340u, 0xF350u, > + 0xBD7Cu, 0x1D6Cu, 0x76EBu, 0xD6FBu, 0xA1E5u, 0x01F5u, 0x6A72u, 0xCA62u, > + 0xF62Au, 0x563Au, 0x3DBDu, 0x9DADu, 0xEAB3u, 0x4AA3u, 0x2124u, 0x8134u, > + 0xCF18u, 0x6F08u, 0x048Fu, 0xA49Fu, 0xD381u, 0x7391u, 0x1816u, 0xB806u, > + 0x6086u, 0xC096u, 0xAB11u, 0x0B01u, 0x7C1Fu, 0xDC0Fu, 0xB788u, 0x1798u, > + 0x59B4u, 0xF9A4u, 0x9223u, 0x3233u, 0x452Du, 0xE53Du, 0x8EBAu, 0x2EAAu, > + 0x12E2u, 0xB2F2u, 0xD975u, 0x7965u, 0x0E7Bu, 0xAE6Bu, 0xC5ECu, 0x65FCu, > + 0x2BD0u, 0x8BC0u, 0xE047u, 0x4057u, 0x3749u, 0x9759u, 0xFCDEu, 0x5CCEu, > + 0xC669u, 0x6679u, 0x0DFEu, 0xADEEu, 0xDAF0u, 0x7AE0u, 0x1167u, 0xB177u, > + 0xFF5Bu, 0x5F4Bu, 0x34CCu, 0x94DCu, 0xE3C2u, 0x43D2u, 0x2855u, 0x8845u, > + 0xB40Du, 0x141Du, 0x7F9Au, 0xDF8Au, 0xA894u, 0x0884u, 0x6303u, 0xC313u, > + 0x8D3Fu, 0x2D2Fu, 0x46A8u, 0xE6B8u, 0x91A6u, 0x31B6u, 0x5A31u, 0xFA21u, > + 0x22A1u, 0x82B1u, 0xE936u, 0x4926u, 0x3E38u, 0x9E28u, 0xF5AFu, 0x55BFu, > + 0x1B93u, 0xBB83u, 0xD004u, 0x7014u, 0x070Au, 0xA71Au, 0xCC9Du, 0x6C8Du, > + 0x50C5u, 0xF0D5u, 0x9B52u, 0x3B42u, 0x4C5Cu, 0xEC4Cu, 0x87CBu, 0x27DBu, > + 0x69F7u, 0xC9E7u, 0xA260u, 0x0270u, 0x756Eu, 0xD57Eu, 0xBEF9u, 0x1EE9u > + }, > + { > + 0x0000u, 0x832Bu, 0x8DE1u, 0x0ECAu, 0x9075u, 0x135Eu, 0x1D94u, 0x9EBFu, > + 0xAB5Du, 0x2876u, 0x26BCu, 0xA597u, 0x3B28u, 0xB803u, 0xB6C9u, 0x35E2u, > + 0xDD0Du, 0x5E26u, 0x50ECu, 0xD3C7u, 0x4D78u, 0xCE53u, 0xC099u, 0x43B2u, > + 0x7650u, 0xF57Bu, 0xFBB1u, 0x789Au, 0xE625u, 0x650Eu, 0x6BC4u, 0xE8EFu, > + 0x31ADu, 0xB286u, 0xBC4Cu, 0x3F67u, 0xA1D8u, 0x22F3u, 0x2C39u, 0xAF12u, > + 0x9AF0u, 0x19DBu, 0x1711u, 0x943Au, 0x0A85u, 0x89AEu, 0x8764u, 0x044Fu, > + 0xECA0u, 0x6F8Bu, 0x6141u, 0xE26Au, 0x7CD5u, 0xFFFEu, 0xF134u, 0x721Fu, > + 0x47FDu, 0xC4D6u, 0xCA1Cu, 0x4937u, 0xD788u, 0x54A3u, 0x5A69u, 0xD942u, > + 0x635Au, 0xE071u, 0xEEBBu, 0x6D90u, 0xF32Fu, 0x7004u, 0x7ECEu, 0xFDE5u, > + 0xC807u, 0x4B2Cu, 0x45E6u, 0xC6CDu, 0x5872u, 0xDB59u, 0xD593u, 0x56B8u, > + 0xBE57u, 0x3D7Cu, 0x33B6u, 0xB09Du, 0x2E22u, 0xAD09u, 0xA3C3u, 0x20E8u, > + 0x150Au, 0x9621u, 0x98EBu, 0x1BC0u, 0x857Fu, 0x0654u, 0x089Eu, 0x8BB5u, > + 0x52F7u, 0xD1DCu, 0xDF16u, 0x5C3Du, 0xC282u, 0x41A9u, 0x4F63u, 0xCC48u, > + 0xF9AAu, 0x7A81u, 0x744Bu, 0xF760u, 0x69DFu, 0xEAF4u, 0xE43Eu, 0x6715u, > + 0x8FFAu, 0x0CD1u, 0x021Bu, 0x8130u, 0x1F8Fu, 0x9CA4u, 0x926Eu, 0x1145u, > + 0x24A7u, 0xA78Cu, 0xA946u, 0x2A6Du, 0xB4D2u, 0x37F9u, 0x3933u, 0xBA18u, > + 0xC6B4u, 0x459Fu, 0x4B55u, 0xC87Eu, 0x56C1u, 0xD5EAu, 0xDB20u, 0x580Bu, > + 0x6DE9u, 0xEEC2u, 0xE008u, 0x6323u, 0xFD9Cu, 0x7EB7u, 0x707Du, 0xF356u, > + 0x1BB9u, 0x9892u, 0x9658u, 0x1573u, 0x8BCCu, 0x08E7u, 0x062Du, 0x8506u, > + 0xB0E4u, 0x33CFu, 0x3D05u, 0xBE2Eu, 0x2091u, 0xA3BAu, 0xAD70u, 0x2E5Bu, > + 0xF719u, 0x7432u, 0x7AF8u, 0xF9D3u, 0x676Cu, 0xE447u, 0xEA8Du, 0x69A6u, > + 0x5C44u, 0xDF6Fu, 0xD1A5u, 0x528Eu, 0xCC31u, 0x4F1Au, 0x41D0u, 0xC2FBu, > + 0x2A14u, 0xA93Fu, 0xA7F5u, 0x24DEu, 0xBA61u, 0x394Au, 0x3780u, 0xB4ABu, > + 0x8149u, 0x0262u, 0x0CA8u, 0x8F83u, 0x113Cu, 0x9217u, 0x9CDDu, 0x1FF6u, > + 0xA5EEu, 0x26C5u, 0x280Fu, 0xAB24u, 0x359Bu, 0xB6B0u, 0xB87Au, 0x3B51u, > + 0x0EB3u, 0x8D98u, 0x8352u, 0x0079u, 0x9EC6u, 0x1DEDu, 0x1327u, 0x900Cu, > + 0x78E3u, 0xFBC8u, 0xF502u, 0x7629u, 0xE896u, 0x6BBDu, 0x6577u, 0xE65Cu, > + 0xD3BEu, 0x5095u, 0x5E5Fu, 0xDD74u, 0x43CBu, 0xC0E0u, 0xCE2Au, 0x4D01u, > + 0x9443u, 0x1768u, 0x19A2u, 0x9A89u, 0x0436u, 0x871Du, 0x89D7u, 0x0AFCu, > + 0x3F1Eu, 0xBC35u, 0xB2FFu, 0x31D4u, 0xAF6Bu, 0x2C40u, 0x228Au, 0xA1A1u, > + 0x494Eu, 0xCA65u, 0xC4AFu, 0x4784u, 0xD93Bu, 0x5A10u, 0x54DAu, 0xD7F1u, > + 0xE213u, 0x6138u, 0x6FF2u, 0xECD9u, 0x7266u, 0xF14Du, 0xFF87u, 0x7CACu > + } > }; > > __u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, size_t len) > { > - unsigned int i; > + const __u8 *i = (const __u8 *)buffer; > + const __u8 *i_end = i + len; > + const __u8 *i_last16 = i + (len / 16 * 16); Why is i_last16 a u8? The len parameter of buffer can be much bigger than u8. Seems like the crc computation will miss the rest of the buffer if the length of buffer is much greater than 256. Tim > > - for (i = 0 ; i < len ; i++) > - crc = (crc << 8) ^ t10_dif_crc_table[((crc >> 8) ^ buffer[i]) & 0xff]; > + for (; i < i_last16; i += 16) { > + crc = t10_dif_crc_table[15][i[0] ^ (__u8)(crc >> 8)] ^ > + t10_dif_crc_table[14][i[1] ^ (__u8)(crc >> 0)] ^ > + t10_dif_crc_table[13][i[2]] ^ > + t10_dif_crc_table[12][i[3]] ^ > + t10_dif_crc_table[11][i[4]] ^ > + t10_dif_crc_table[10][i[5]] ^ > + t10_dif_crc_table[9][i[6]] ^ > + t10_dif_crc_table[8][i[7]] ^ > + t10_dif_crc_table[7][i[8]] ^ > + t10_dif_crc_table[6][i[9]] ^ > + t10_dif_crc_table[5][i[10]] ^ > + t10_dif_crc_table[4][i[11]] ^ > + t10_dif_crc_table[3][i[12]] ^ > + t10_dif_crc_table[2][i[13]] ^ > + t10_dif_crc_table[1][i[14]] ^ > + t10_dif_crc_table[0][i[15]]; > + } > + > + for (; i < i_end; i++) > + crc = t10_dif_crc_table[0][*i ^ (__u8)(crc >> 8)] ^ (crc << 8); > > return crc; > } >
Tim, To answer your question "Why is i_last16 a u8?". It's not a u8; it's a u8 * so that won't limit the length to 256. Jeff Lien -----Original Message----- From: Tim Chen [mailto:tim.c.chen@linux.intel.com] Sent: Monday, August 13, 2018 5:45 PM To: Jeffrey Lien <Jeff.Lien@wdc.com>; linux-kernel@vger.kernel.org; linux-crypto@vger.kernel.org; linux-block@vger.kernel.org; linux-scsi@vger.kernel.org Cc: herbert@gondor.apana.org.au; martin.petersen@oracle.com; David Darrington <david.darrington@wdc.com>; Jeff Furlong <jeff.furlong@wdc.com> Subject: Re: [PATCH] Performance Improvement in CRC16 Calculations. On 08/10/2018 12:12 PM, Jeff Lien wrote: > This patch provides a performance improvement for the CRC16 > calculations done in read/write workloads using the T10 Type 1/2/3 > guard field. For example, today with sequential write workloads (one > thread/CPU of IO) we consume 100% of the CPU because of the CRC16 > computation bottleneck. Today's block devices are considerably > faster, but the CRC16 calculation prevents folks from utilizing the > throughput of such devices. To speed up this calculation and expose > the block device throughput, we slice the old single byte for loop into a 16 byte for loop, with a larger CRC table to match. The result has shown 5x performance improvements on various big endian and little endian systems running the 4.18.0 kernel version. > > FIO Sequential Write, 64K Block Size, Queue Depth 64 > BE Base Kernel: bw=201.5 MiB/s > BE Modified CRC Calc: bw=968.1 MiB/s > 4.80x performance improvement > > LE Base Kernel: bw=357 MiB/s > LE Modified CRC Calc: bw=1964 MiB/s > 5.51x performance improvement > > FIO Sequential Read, 64K Block Size, Queue Depth 64 > BE Base Kernel: bw=611.2 MiB/s > BE Modified CRC calc: bw=684.9 MiB/s > 1.12x performance improvement > > LE Base Kernel: bw=797 MiB/s > LE Modified CRC Calc: bw=2730 MiB/s > 3.42x performance improvement > > Reviewed-by: Dave Darrington <david.darrington@wdc.com> > Reviewed-by: Jeff Furlong <jeff.furlong@wdc.com> > Signed-off-by: Jeff Lien <jeff.lien@wdc.com> > --- > crypto/crct10dif_common.c | 605 > +++++++++++++++++++++++++++++++++++++++++++--- > 1 file changed, 569 insertions(+), 36 deletions(-) > > diff --git a/crypto/crct10dif_common.c b/crypto/crct10dif_common.c > index b2fab36..40e1d6c 100644 > --- a/crypto/crct10dif_common.c > +++ b/crypto/crct10dif_common.c > @@ -32,47 +32,580 @@ > * x^16 + x^15 + x^11 + x^9 + x^8 + x^7 + x^5 + x^4 + x^2 + x + 1 > * gt: 0x8bb7 > */ > -static const __u16 t10_dif_crc_table[256] = { > - 0x0000, 0x8BB7, 0x9CD9, 0x176E, 0xB205, 0x39B2, 0x2EDC, 0xA56B, > - 0xEFBD, 0x640A, 0x7364, 0xF8D3, 0x5DB8, 0xD60F, 0xC161, 0x4AD6, > - 0x54CD, 0xDF7A, 0xC814, 0x43A3, 0xE6C8, 0x6D7F, 0x7A11, 0xF1A6, > - 0xBB70, 0x30C7, 0x27A9, 0xAC1E, 0x0975, 0x82C2, 0x95AC, 0x1E1B, > - 0xA99A, 0x222D, 0x3543, 0xBEF4, 0x1B9F, 0x9028, 0x8746, 0x0CF1, > - 0x4627, 0xCD90, 0xDAFE, 0x5149, 0xF422, 0x7F95, 0x68FB, 0xE34C, > - 0xFD57, 0x76E0, 0x618E, 0xEA39, 0x4F52, 0xC4E5, 0xD38B, 0x583C, > - 0x12EA, 0x995D, 0x8E33, 0x0584, 0xA0EF, 0x2B58, 0x3C36, 0xB781, > - 0xD883, 0x5334, 0x445A, 0xCFED, 0x6A86, 0xE131, 0xF65F, 0x7DE8, > - 0x373E, 0xBC89, 0xABE7, 0x2050, 0x853B, 0x0E8C, 0x19E2, 0x9255, > - 0x8C4E, 0x07F9, 0x1097, 0x9B20, 0x3E4B, 0xB5FC, 0xA292, 0x2925, > - 0x63F3, 0xE844, 0xFF2A, 0x749D, 0xD1F6, 0x5A41, 0x4D2F, 0xC698, > - 0x7119, 0xFAAE, 0xEDC0, 0x6677, 0xC31C, 0x48AB, 0x5FC5, 0xD472, > - 0x9EA4, 0x1513, 0x027D, 0x89CA, 0x2CA1, 0xA716, 0xB078, 0x3BCF, > - 0x25D4, 0xAE63, 0xB90D, 0x32BA, 0x97D1, 0x1C66, 0x0B08, 0x80BF, > - 0xCA69, 0x41DE, 0x56B0, 0xDD07, 0x786C, 0xF3DB, 0xE4B5, 0x6F02, > - 0x3AB1, 0xB106, 0xA668, 0x2DDF, 0x88B4, 0x0303, 0x146D, 0x9FDA, > - 0xD50C, 0x5EBB, 0x49D5, 0xC262, 0x6709, 0xECBE, 0xFBD0, 0x7067, > - 0x6E7C, 0xE5CB, 0xF2A5, 0x7912, 0xDC79, 0x57CE, 0x40A0, 0xCB17, > - 0x81C1, 0x0A76, 0x1D18, 0x96AF, 0x33C4, 0xB873, 0xAF1D, 0x24AA, > - 0x932B, 0x189C, 0x0FF2, 0x8445, 0x212E, 0xAA99, 0xBDF7, 0x3640, > - 0x7C96, 0xF721, 0xE04F, 0x6BF8, 0xCE93, 0x4524, 0x524A, 0xD9FD, > - 0xC7E6, 0x4C51, 0x5B3F, 0xD088, 0x75E3, 0xFE54, 0xE93A, 0x628D, > - 0x285B, 0xA3EC, 0xB482, 0x3F35, 0x9A5E, 0x11E9, 0x0687, 0x8D30, > - 0xE232, 0x6985, 0x7EEB, 0xF55C, 0x5037, 0xDB80, 0xCCEE, 0x4759, > - 0x0D8F, 0x8638, 0x9156, 0x1AE1, 0xBF8A, 0x343D, 0x2353, 0xA8E4, > - 0xB6FF, 0x3D48, 0x2A26, 0xA191, 0x04FA, 0x8F4D, 0x9823, 0x1394, > - 0x5942, 0xD2F5, 0xC59B, 0x4E2C, 0xEB47, 0x60F0, 0x779E, 0xFC29, > - 0x4BA8, 0xC01F, 0xD771, 0x5CC6, 0xF9AD, 0x721A, 0x6574, 0xEEC3, > - 0xA415, 0x2FA2, 0x38CC, 0xB37B, 0x1610, 0x9DA7, 0x8AC9, 0x017E, > - 0x1F65, 0x94D2, 0x83BC, 0x080B, 0xAD60, 0x26D7, 0x31B9, 0xBA0E, > - 0xF0D8, 0x7B6F, 0x6C01, 0xE7B6, 0x42DD, 0xC96A, 0xDE04, 0x55B3 > +static const __u16 t10_dif_crc_table[16][256] = { > + { > + 0x0000u, 0x8BB7u, 0x9CD9u, 0x176Eu, 0xB205u, 0x39B2u, 0x2EDCu, 0xA56Bu, > + 0xEFBDu, 0x640Au, 0x7364u, 0xF8D3u, 0x5DB8u, 0xD60Fu, 0xC161u, 0x4AD6u, > + 0x54CDu, 0xDF7Au, 0xC814u, 0x43A3u, 0xE6C8u, 0x6D7Fu, 0x7A11u, 0xF1A6u, > + 0xBB70u, 0x30C7u, 0x27A9u, 0xAC1Eu, 0x0975u, 0x82C2u, 0x95ACu, 0x1E1Bu, > + 0xA99Au, 0x222Du, 0x3543u, 0xBEF4u, 0x1B9Fu, 0x9028u, 0x8746u, 0x0CF1u, > + 0x4627u, 0xCD90u, 0xDAFEu, 0x5149u, 0xF422u, 0x7F95u, 0x68FBu, 0xE34Cu, > + 0xFD57u, 0x76E0u, 0x618Eu, 0xEA39u, 0x4F52u, 0xC4E5u, 0xD38Bu, 0x583Cu, > + 0x12EAu, 0x995Du, 0x8E33u, 0x0584u, 0xA0EFu, 0x2B58u, 0x3C36u, 0xB781u, > + 0xD883u, 0x5334u, 0x445Au, 0xCFEDu, 0x6A86u, 0xE131u, 0xF65Fu, 0x7DE8u, > + 0x373Eu, 0xBC89u, 0xABE7u, 0x2050u, 0x853Bu, 0x0E8Cu, 0x19E2u, 0x9255u, > + 0x8C4Eu, 0x07F9u, 0x1097u, 0x9B20u, 0x3E4Bu, 0xB5FCu, 0xA292u, 0x2925u, > + 0x63F3u, 0xE844u, 0xFF2Au, 0x749Du, 0xD1F6u, 0x5A41u, 0x4D2Fu, 0xC698u, > + 0x7119u, 0xFAAEu, 0xEDC0u, 0x6677u, 0xC31Cu, 0x48ABu, 0x5FC5u, 0xD472u, > + 0x9EA4u, 0x1513u, 0x027Du, 0x89CAu, 0x2CA1u, 0xA716u, 0xB078u, 0x3BCFu, > + 0x25D4u, 0xAE63u, 0xB90Du, 0x32BAu, 0x97D1u, 0x1C66u, 0x0B08u, 0x80BFu, > + 0xCA69u, 0x41DEu, 0x56B0u, 0xDD07u, 0x786Cu, 0xF3DBu, 0xE4B5u, 0x6F02u, > + 0x3AB1u, 0xB106u, 0xA668u, 0x2DDFu, 0x88B4u, 0x0303u, 0x146Du, 0x9FDAu, > + 0xD50Cu, 0x5EBBu, 0x49D5u, 0xC262u, 0x6709u, 0xECBEu, 0xFBD0u, 0x7067u, > + 0x6E7Cu, 0xE5CBu, 0xF2A5u, 0x7912u, 0xDC79u, 0x57CEu, 0x40A0u, 0xCB17u, > + 0x81C1u, 0x0A76u, 0x1D18u, 0x96AFu, 0x33C4u, 0xB873u, 0xAF1Du, 0x24AAu, > + 0x932Bu, 0x189Cu, 0x0FF2u, 0x8445u, 0x212Eu, 0xAA99u, 0xBDF7u, 0x3640u, > + 0x7C96u, 0xF721u, 0xE04Fu, 0x6BF8u, 0xCE93u, 0x4524u, 0x524Au, 0xD9FDu, > + 0xC7E6u, 0x4C51u, 0x5B3Fu, 0xD088u, 0x75E3u, 0xFE54u, 0xE93Au, 0x628Du, > + 0x285Bu, 0xA3ECu, 0xB482u, 0x3F35u, 0x9A5Eu, 0x11E9u, 0x0687u, 0x8D30u, > + 0xE232u, 0x6985u, 0x7EEBu, 0xF55Cu, 0x5037u, 0xDB80u, 0xCCEEu, 0x4759u, > + 0x0D8Fu, 0x8638u, 0x9156u, 0x1AE1u, 0xBF8Au, 0x343Du, 0x2353u, 0xA8E4u, > + 0xB6FFu, 0x3D48u, 0x2A26u, 0xA191u, 0x04FAu, 0x8F4Du, 0x9823u, 0x1394u, > + 0x5942u, 0xD2F5u, 0xC59Bu, 0x4E2Cu, 0xEB47u, 0x60F0u, 0x779Eu, 0xFC29u, > + 0x4BA8u, 0xC01Fu, 0xD771u, 0x5CC6u, 0xF9ADu, 0x721Au, 0x6574u, 0xEEC3u, > + 0xA415u, 0x2FA2u, 0x38CCu, 0xB37Bu, 0x1610u, 0x9DA7u, 0x8AC9u, 0x017Eu, > + 0x1F65u, 0x94D2u, 0x83BCu, 0x080Bu, 0xAD60u, 0x26D7u, 0x31B9u, 0xBA0Eu, > + 0xF0D8u, 0x7B6Fu, 0x6C01u, 0xE7B6u, 0x42DDu, 0xC96Au, 0xDE04u, 0x55B3u > + }, > + { > + 0x0000u, 0x7562u, 0xEAC4u, 0x9FA6u, 0x5E3Fu, 0x2B5Du, 0xB4FBu, 0xC199u, > + 0xBC7Eu, 0xC91Cu, 0x56BAu, 0x23D8u, 0xE241u, 0x9723u, 0x0885u, 0x7DE7u, > + 0xF34Bu, 0x8629u, 0x198Fu, 0x6CEDu, 0xAD74u, 0xD816u, 0x47B0u, 0x32D2u, > + 0x4F35u, 0x3A57u, 0xA5F1u, 0xD093u, 0x110Au, 0x6468u, 0xFBCEu, 0x8EACu, > + 0x6D21u, 0x1843u, 0x87E5u, 0xF287u, 0x331Eu, 0x467Cu, 0xD9DAu, 0xACB8u, > + 0xD15Fu, 0xA43Du, 0x3B9Bu, 0x4EF9u, 0x8F60u, 0xFA02u, 0x65A4u, 0x10C6u, > + 0x9E6Au, 0xEB08u, 0x74AEu, 0x01CCu, 0xC055u, 0xB537u, 0x2A91u, 0x5FF3u, > + 0x2214u, 0x5776u, 0xC8D0u, 0xBDB2u, 0x7C2Bu, 0x0949u, 0x96EFu, 0xE38Du, > + 0xDA42u, 0xAF20u, 0x3086u, 0x45E4u, 0x847Du, 0xF11Fu, 0x6EB9u, 0x1BDBu, > + 0x663Cu, 0x135Eu, 0x8CF8u, 0xF99Au, 0x3803u, 0x4D61u, 0xD2C7u, 0xA7A5u, > + 0x2909u, 0x5C6Bu, 0xC3CDu, 0xB6AFu, 0x7736u, 0x0254u, 0x9DF2u, 0xE890u, > + 0x9577u, 0xE015u, 0x7FB3u, 0x0AD1u, 0xCB48u, 0xBE2Au, 0x218Cu, 0x54EEu, > + 0xB763u, 0xC201u, 0x5DA7u, 0x28C5u, 0xE95Cu, 0x9C3Eu, 0x0398u, 0x76FAu, > + 0x0B1Du, 0x7E7Fu, 0xE1D9u, 0x94BBu, 0x5522u, 0x2040u, 0xBFE6u, 0xCA84u, > + 0x4428u, 0x314Au, 0xAEECu, 0xDB8Eu, 0x1A17u, 0x6F75u, 0xF0D3u, 0x85B1u, > + 0xF856u, 0x8D34u, 0x1292u, 0x67F0u, 0xA669u, 0xD30Bu, 0x4CADu, 0x39CFu, > + 0x3F33u, 0x4A51u, 0xD5F7u, 0xA095u, 0x610Cu, 0x146Eu, 0x8BC8u, 0xFEAAu, > + 0x834Du, 0xF62Fu, 0x6989u, 0x1CEBu, 0xDD72u, 0xA810u, 0x37B6u, 0x42D4u, > + 0xCC78u, 0xB91Au, 0x26BCu, 0x53DEu, 0x9247u, 0xE725u, 0x7883u, 0x0DE1u, > + 0x7006u, 0x0564u, 0x9AC2u, 0xEFA0u, 0x2E39u, 0x5B5Bu, 0xC4FDu, 0xB19Fu, > + 0x5212u, 0x2770u, 0xB8D6u, 0xCDB4u, 0x0C2Du, 0x794Fu, 0xE6E9u, 0x938Bu, > + 0xEE6Cu, 0x9B0Eu, 0x04A8u, 0x71CAu, 0xB053u, 0xC531u, 0x5A97u, 0x2FF5u, > + 0xA159u, 0xD43Bu, 0x4B9Du, 0x3EFFu, 0xFF66u, 0x8A04u, 0x15A2u, 0x60C0u, > + 0x1D27u, 0x6845u, 0xF7E3u, 0x8281u, 0x4318u, 0x367Au, 0xA9DCu, 0xDCBEu, > + 0xE571u, 0x9013u, 0x0FB5u, 0x7AD7u, 0xBB4Eu, 0xCE2Cu, 0x518Au, 0x24E8u, > + 0x590Fu, 0x2C6Du, 0xB3CBu, 0xC6A9u, 0x0730u, 0x7252u, 0xEDF4u, 0x9896u, > + 0x163Au, 0x6358u, 0xFCFEu, 0x899Cu, 0x4805u, 0x3D67u, 0xA2C1u, 0xD7A3u, > + 0xAA44u, 0xDF26u, 0x4080u, 0x35E2u, 0xF47Bu, 0x8119u, 0x1EBFu, 0x6BDDu, > + 0x8850u, 0xFD32u, 0x6294u, 0x17F6u, 0xD66Fu, 0xA30Du, 0x3CABu, 0x49C9u, > + 0x342Eu, 0x414Cu, 0xDEEAu, 0xAB88u, 0x6A11u, 0x1F73u, 0x80D5u, 0xF5B7u, > + 0x7B1Bu, 0x0E79u, 0x91DFu, 0xE4BDu, 0x2524u, 0x5046u, 0xCFE0u, 0xBA82u, > + 0xC765u, 0xB207u, 0x2DA1u, 0x58C3u, 0x995Au, 0xEC38u, 0x739Eu, 0x06FCu > + }, > + { > + 0x0000u, 0x7E66u, 0xFCCCu, 0x82AAu, 0x722Fu, 0x0C49u, 0x8EE3u, 0xF085u, > + 0xE45Eu, 0x9A38u, 0x1892u, 0x66F4u, 0x9671u, 0xE817u, 0x6ABDu, 0x14DBu, > + 0x430Bu, 0x3D6Du, 0xBFC7u, 0xC1A1u, 0x3124u, 0x4F42u, 0xCDE8u, 0xB38Eu, > + 0xA755u, 0xD933u, 0x5B99u, 0x25FFu, 0xD57Au, 0xAB1Cu, 0x29B6u, 0x57D0u, > + 0x8616u, 0xF870u, 0x7ADAu, 0x04BCu, 0xF439u, 0x8A5Fu, 0x08F5u, 0x7693u, > + 0x6248u, 0x1C2Eu, 0x9E84u, 0xE0E2u, 0x1067u, 0x6E01u, 0xECABu, 0x92CDu, > + 0xC51Du, 0xBB7Bu, 0x39D1u, 0x47B7u, 0xB732u, 0xC954u, 0x4BFEu, 0x3598u, > + 0x2143u, 0x5F25u, 0xDD8Fu, 0xA3E9u, 0x536Cu, 0x2D0Au, 0xAFA0u, 0xD1C6u, > + 0x879Bu, 0xF9FDu, 0x7B57u, 0x0531u, 0xF5B4u, 0x8BD2u, 0x0978u, 0x771Eu, > + 0x63C5u, 0x1DA3u, 0x9F09u, 0xE16Fu, 0x11EAu, 0x6F8Cu, 0xED26u, 0x9340u, > + 0xC490u, 0xBAF6u, 0x385Cu, 0x463Au, 0xB6BFu, 0xC8D9u, 0x4A73u, 0x3415u, > + 0x20CEu, 0x5EA8u, 0xDC02u, 0xA264u, 0x52E1u, 0x2C87u, 0xAE2Du, 0xD04Bu, > + 0x018Du, 0x7FEBu, 0xFD41u, 0x8327u, 0x73A2u, 0x0DC4u, 0x8F6Eu, 0xF108u, > + 0xE5D3u, 0x9BB5u, 0x191Fu, 0x6779u, 0x97FCu, 0xE99Au, 0x6B30u, 0x1556u, > + 0x4286u, 0x3CE0u, 0xBE4Au, 0xC02Cu, 0x30A9u, 0x4ECFu, 0xCC65u, 0xB203u, > + 0xA6D8u, 0xD8BEu, 0x5A14u, 0x2472u, 0xD4F7u, 0xAA91u, 0x283Bu, 0x565Du, > + 0x8481u, 0xFAE7u, 0x784Du, 0x062Bu, 0xF6AEu, 0x88C8u, 0x0A62u, 0x7404u, > + 0x60DFu, 0x1EB9u, 0x9C13u, 0xE275u, 0x12F0u, 0x6C96u, 0xEE3Cu, 0x905Au, > + 0xC78Au, 0xB9ECu, 0x3B46u, 0x4520u, 0xB5A5u, 0xCBC3u, 0x4969u, 0x370Fu, > + 0x23D4u, 0x5DB2u, 0xDF18u, 0xA17Eu, 0x51FBu, 0x2F9Du, 0xAD37u, 0xD351u, > + 0x0297u, 0x7CF1u, 0xFE5Bu, 0x803Du, 0x70B8u, 0x0EDEu, 0x8C74u, 0xF212u, > + 0xE6C9u, 0x98AFu, 0x1A05u, 0x6463u, 0x94E6u, 0xEA80u, 0x682Au, 0x164Cu, > + 0x419Cu, 0x3FFAu, 0xBD50u, 0xC336u, 0x33B3u, 0x4DD5u, 0xCF7Fu, 0xB119u, > + 0xA5C2u, 0xDBA4u, 0x590Eu, 0x2768u, 0xD7EDu, 0xA98Bu, 0x2B21u, 0x5547u, > + 0x031Au, 0x7D7Cu, 0xFFD6u, 0x81B0u, 0x7135u, 0x0F53u, 0x8DF9u, 0xF39Fu, > + 0xE744u, 0x9922u, 0x1B88u, 0x65EEu, 0x956Bu, 0xEB0Du, 0x69A7u, 0x17C1u, > + 0x4011u, 0x3E77u, 0xBCDDu, 0xC2BBu, 0x323Eu, 0x4C58u, 0xCEF2u, 0xB094u, > + 0xA44Fu, 0xDA29u, 0x5883u, 0x26E5u, 0xD660u, 0xA806u, 0x2AACu, 0x54CAu, > + 0x850Cu, 0xFB6Au, 0x79C0u, 0x07A6u, 0xF723u, 0x8945u, 0x0BEFu, 0x7589u, > + 0x6152u, 0x1F34u, 0x9D9Eu, 0xE3F8u, 0x137Du, 0x6D1Bu, 0xEFB1u, 0x91D7u, > + 0xC607u, 0xB861u, 0x3ACBu, 0x44ADu, 0xB428u, 0xCA4Eu, 0x48E4u, 0x3682u, > + 0x2259u, 0x5C3Fu, 0xDE95u, 0xA0F3u, 0x5076u, 0x2E10u, 0xACBAu, 0xD2DCu > + }, > + { > + 0x0000u, 0x82B5u, 0x8EDDu, 0x0C68u, 0x960Du, 0x14B8u, 0x18D0u, 0x9A65u, > + 0xA7ADu, 0x2518u, 0x2970u, 0xABC5u, 0x31A0u, 0xB315u, 0xBF7Du, 0x3DC8u, > + 0xC4EDu, 0x4658u, 0x4A30u, 0xC885u, 0x52E0u, 0xD055u, 0xDC3Du, 0x5E88u, > + 0x6340u, 0xE1F5u, 0xED9Du, 0x6F28u, 0xF54Du, 0x77F8u, 0x7B90u, 0xF925u, > + 0x026Du, 0x80D8u, 0x8CB0u, 0x0E05u, 0x9460u, 0x16D5u, 0x1ABDu, 0x9808u, > + 0xA5C0u, 0x2775u, 0x2B1Du, 0xA9A8u, 0x33CDu, 0xB178u, 0xBD10u, 0x3FA5u, > + 0xC680u, 0x4435u, 0x485Du, 0xCAE8u, 0x508Du, 0xD238u, 0xDE50u, 0x5CE5u, > + 0x612Du, 0xE398u, 0xEFF0u, 0x6D45u, 0xF720u, 0x7595u, 0x79FDu, 0xFB48u, > + 0x04DAu, 0x866Fu, 0x8A07u, 0x08B2u, 0x92D7u, 0x1062u, 0x1C0Au, 0x9EBFu, > + 0xA377u, 0x21C2u, 0x2DAAu, 0xAF1Fu, 0x357Au, 0xB7CFu, 0xBBA7u, 0x3912u, > + 0xC037u, 0x4282u, 0x4EEAu, 0xCC5Fu, 0x563Au, 0xD48Fu, 0xD8E7u, 0x5A52u, > + 0x679Au, 0xE52Fu, 0xE947u, 0x6BF2u, 0xF197u, 0x7322u, 0x7F4Au, 0xFDFFu, > + 0x06B7u, 0x8402u, 0x886Au, 0x0ADFu, 0x90BAu, 0x120Fu, 0x1E67u, 0x9CD2u, > + 0xA11Au, 0x23AFu, 0x2FC7u, 0xAD72u, 0x3717u, 0xB5A2u, 0xB9CAu, 0x3B7Fu, > + 0xC25Au, 0x40EFu, 0x4C87u, 0xCE32u, 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0x9E28u, 0xF5AFu, 0x55BFu, > + 0x1B93u, 0xBB83u, 0xD004u, 0x7014u, 0x070Au, 0xA71Au, 0xCC9Du, 0x6C8Du, > + 0x50C5u, 0xF0D5u, 0x9B52u, 0x3B42u, 0x4C5Cu, 0xEC4Cu, 0x87CBu, 0x27DBu, > + 0x69F7u, 0xC9E7u, 0xA260u, 0x0270u, 0x756Eu, 0xD57Eu, 0xBEF9u, 0x1EE9u > + }, > + { > + 0x0000u, 0x832Bu, 0x8DE1u, 0x0ECAu, 0x9075u, 0x135Eu, 0x1D94u, 0x9EBFu, > + 0xAB5Du, 0x2876u, 0x26BCu, 0xA597u, 0x3B28u, 0xB803u, 0xB6C9u, 0x35E2u, > + 0xDD0Du, 0x5E26u, 0x50ECu, 0xD3C7u, 0x4D78u, 0xCE53u, 0xC099u, 0x43B2u, > + 0x7650u, 0xF57Bu, 0xFBB1u, 0x789Au, 0xE625u, 0x650Eu, 0x6BC4u, 0xE8EFu, > + 0x31ADu, 0xB286u, 0xBC4Cu, 0x3F67u, 0xA1D8u, 0x22F3u, 0x2C39u, 0xAF12u, > + 0x9AF0u, 0x19DBu, 0x1711u, 0x943Au, 0x0A85u, 0x89AEu, 0x8764u, 0x044Fu, > + 0xECA0u, 0x6F8Bu, 0x6141u, 0xE26Au, 0x7CD5u, 0xFFFEu, 0xF134u, 0x721Fu, > + 0x47FDu, 0xC4D6u, 0xCA1Cu, 0x4937u, 0xD788u, 0x54A3u, 0x5A69u, 0xD942u, > + 0x635Au, 0xE071u, 0xEEBBu, 0x6D90u, 0xF32Fu, 0x7004u, 0x7ECEu, 0xFDE5u, > + 0xC807u, 0x4B2Cu, 0x45E6u, 0xC6CDu, 0x5872u, 0xDB59u, 0xD593u, 0x56B8u, > + 0xBE57u, 0x3D7Cu, 0x33B6u, 0xB09Du, 0x2E22u, 0xAD09u, 0xA3C3u, 0x20E8u, > + 0x150Au, 0x9621u, 0x98EBu, 0x1BC0u, 0x857Fu, 0x0654u, 0x089Eu, 0x8BB5u, > + 0x52F7u, 0xD1DCu, 0xDF16u, 0x5C3Du, 0xC282u, 0x41A9u, 0x4F63u, 0xCC48u, > + 0xF9AAu, 0x7A81u, 0x744Bu, 0xF760u, 0x69DFu, 0xEAF4u, 0xE43Eu, 0x6715u, > + 0x8FFAu, 0x0CD1u, 0x021Bu, 0x8130u, 0x1F8Fu, 0x9CA4u, 0x926Eu, 0x1145u, > + 0x24A7u, 0xA78Cu, 0xA946u, 0x2A6Du, 0xB4D2u, 0x37F9u, 0x3933u, 0xBA18u, > + 0xC6B4u, 0x459Fu, 0x4B55u, 0xC87Eu, 0x56C1u, 0xD5EAu, 0xDB20u, 0x580Bu, > + 0x6DE9u, 0xEEC2u, 0xE008u, 0x6323u, 0xFD9Cu, 0x7EB7u, 0x707Du, 0xF356u, > + 0x1BB9u, 0x9892u, 0x9658u, 0x1573u, 0x8BCCu, 0x08E7u, 0x062Du, 0x8506u, > + 0xB0E4u, 0x33CFu, 0x3D05u, 0xBE2Eu, 0x2091u, 0xA3BAu, 0xAD70u, 0x2E5Bu, > + 0xF719u, 0x7432u, 0x7AF8u, 0xF9D3u, 0x676Cu, 0xE447u, 0xEA8Du, 0x69A6u, > + 0x5C44u, 0xDF6Fu, 0xD1A5u, 0x528Eu, 0xCC31u, 0x4F1Au, 0x41D0u, 0xC2FBu, > + 0x2A14u, 0xA93Fu, 0xA7F5u, 0x24DEu, 0xBA61u, 0x394Au, 0x3780u, 0xB4ABu, > + 0x8149u, 0x0262u, 0x0CA8u, 0x8F83u, 0x113Cu, 0x9217u, 0x9CDDu, 0x1FF6u, > + 0xA5EEu, 0x26C5u, 0x280Fu, 0xAB24u, 0x359Bu, 0xB6B0u, 0xB87Au, 0x3B51u, > + 0x0EB3u, 0x8D98u, 0x8352u, 0x0079u, 0x9EC6u, 0x1DEDu, 0x1327u, 0x900Cu, > + 0x78E3u, 0xFBC8u, 0xF502u, 0x7629u, 0xE896u, 0x6BBDu, 0x6577u, 0xE65Cu, > + 0xD3BEu, 0x5095u, 0x5E5Fu, 0xDD74u, 0x43CBu, 0xC0E0u, 0xCE2Au, 0x4D01u, > + 0x9443u, 0x1768u, 0x19A2u, 0x9A89u, 0x0436u, 0x871Du, 0x89D7u, 0x0AFCu, > + 0x3F1Eu, 0xBC35u, 0xB2FFu, 0x31D4u, 0xAF6Bu, 0x2C40u, 0x228Au, 0xA1A1u, > + 0x494Eu, 0xCA65u, 0xC4AFu, 0x4784u, 0xD93Bu, 0x5A10u, 0x54DAu, 0xD7F1u, > + 0xE213u, 0x6138u, 0x6FF2u, 0xECD9u, 0x7266u, 0xF14Du, 0xFF87u, 0x7CACu > + } > }; > > __u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, > size_t len) { > - unsigned int i; > + const __u8 *i = (const __u8 *)buffer; > + const __u8 *i_end = i + len; > + const __u8 *i_last16 = i + (len / 16 * 16); Why is i_last16 a u8? The len parameter of buffer can be much bigger than u8. Seems like the crc computation will miss the rest of the buffer if the length of buffer is much greater than 256. Tim > > - for (i = 0 ; i < len ; i++) > - crc = (crc << 8) ^ t10_dif_crc_table[((crc >> 8) ^ buffer[i]) & 0xff]; > + for (; i < i_last16; i += 16) { > + crc = t10_dif_crc_table[15][i[0] ^ (__u8)(crc >> 8)] ^ > + t10_dif_crc_table[14][i[1] ^ (__u8)(crc >> 0)] ^ > + t10_dif_crc_table[13][i[2]] ^ > + t10_dif_crc_table[12][i[3]] ^ > + t10_dif_crc_table[11][i[4]] ^ > + t10_dif_crc_table[10][i[5]] ^ > + t10_dif_crc_table[9][i[6]] ^ > + t10_dif_crc_table[8][i[7]] ^ > + t10_dif_crc_table[7][i[8]] ^ > + t10_dif_crc_table[6][i[9]] ^ > + t10_dif_crc_table[5][i[10]] ^ > + t10_dif_crc_table[4][i[11]] ^ > + t10_dif_crc_table[3][i[12]] ^ > + t10_dif_crc_table[2][i[13]] ^ > + t10_dif_crc_table[1][i[14]] ^ > + t10_dif_crc_table[0][i[15]]; > + } > + > + for (; i < i_end; i++) > + crc = t10_dif_crc_table[0][*i ^ (__u8)(crc >> 8)] ^ (crc << 8); > > return crc; > } >
Hi! > This patch provides a performance improvement for the CRC16 calculations done in read/write > workloads using the T10 Type 1/2/3 guard field. For example, today with sequential write > workloads (one thread/CPU of IO) we consume 100% of the CPU because of the CRC16 computation > bottleneck. Today's block devices are considerably faster, but the CRC16 calculation prevents > folks from utilizing the throughput of such devices. To speed up this calculation and expose > the block device throughput, we slice the old single byte for loop into a 16 byte for loop, > with a larger CRC table to match. The result has shown 5x performance improvements on various > big endian and little endian systems running the 4.18.0 kernel version. Well, 8K table fits in cache easily, and when running benchmark, table will be cached so it is a win... Is it also win on non-benchmark workloads and smaller systems? Pavel
Eric, We did not test the slice by 4 or 8 tables. I'm not sure of the value of doing that since the slice by 16 will provide the best performance gain. If I'm missing anything here, please let me know. I'm working on a new version of the patch based on the feedback from others and will also change the pointer variables to start with p and fix the indenting you mentioned below in the new version of the patch. Thanks Jeff Lien -----Original Message----- From: Eric Biggers [mailto:ebiggers@kernel.org] Sent: Friday, August 10, 2018 3:16 PM To: Jeffrey Lien <Jeff.Lien@wdc.com> Cc: linux-kernel@vger.kernel.org; linux-crypto@vger.kernel.org; linux-block@vger.kernel.org; linux-scsi@vger.kernel.org; herbert@gondor.apana.org.au; tim.c.chen@linux.intel.com; martin.petersen@oracle.com; David Darrington <david.darrington@wdc.com>; Jeff Furlong <jeff.furlong@wdc.com> Subject: Re: [PATCH] Performance Improvement in CRC16 Calculations. On Fri, Aug 10, 2018 at 02:12:11PM -0500, Jeff Lien wrote: > This patch provides a performance improvement for the CRC16 > calculations done in read/write workloads using the T10 Type 1/2/3 > guard field. For example, today with sequential write workloads (one > thread/CPU of IO) we consume 100% of the CPU because of the CRC16 > computation bottleneck. Today's block devices are considerably > faster, but the CRC16 calculation prevents folks from utilizing the > throughput of such devices. To speed up this calculation and expose > the block device throughput, we slice the old single byte for loop into a 16 byte for loop, with a larger CRC table to match. The result has shown 5x performance improvements on various big endian and little endian systems running the 4.18.0 kernel version. > > FIO Sequential Write, 64K Block Size, Queue Depth 64 > BE Base Kernel: bw=201.5 MiB/s > BE Modified CRC Calc: bw=968.1 MiB/s > 4.80x performance improvement > > LE Base Kernel: bw=357 MiB/s > LE Modified CRC Calc: bw=1964 MiB/s > 5.51x performance improvement > > FIO Sequential Read, 64K Block Size, Queue Depth 64 > BE Base Kernel: bw=611.2 MiB/s > BE Modified CRC calc: bw=684.9 MiB/s > 1.12x performance improvement > > LE Base Kernel: bw=797 MiB/s > LE Modified CRC Calc: bw=2730 MiB/s > 3.42x performance improvement Did you also test the slice-by-4 (requires 2048-byte table) and slice-by-8 (requires 4096-byte table) methods? Your proposal is slice-by-16 (requires 8192-byte table); the original was slice-by-1 (requires 512-byte table). > __u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, > size_t len) { > - unsigned int i; > + const __u8 *i = (const __u8 *)buffer; > + const __u8 *i_end = i + len; > + const __u8 *i_last16 = i + (len / 16 * 16); 'i' is normally a loop counter, not a pointer. Use 'p', 'p_end', and 'p_last16'. > > - for (i = 0 ; i < len ; i++) > - crc = (crc << 8) ^ t10_dif_crc_table[((crc >> 8) ^ buffer[i]) & 0xff]; > + for (; i < i_last16; i += 16) { > + crc = t10_dif_crc_table[15][i[0] ^ (__u8)(crc >> 8)] ^ > + t10_dif_crc_table[14][i[1] ^ (__u8)(crc >> 0)] ^ > + t10_dif_crc_table[13][i[2]] ^ > + t10_dif_crc_table[12][i[3]] ^ > + t10_dif_crc_table[11][i[4]] ^ > + t10_dif_crc_table[10][i[5]] ^ > + t10_dif_crc_table[9][i[6]] ^ > + t10_dif_crc_table[8][i[7]] ^ > + t10_dif_crc_table[7][i[8]] ^ > + t10_dif_crc_table[6][i[9]] ^ > + t10_dif_crc_table[5][i[10]] ^ > + t10_dif_crc_table[4][i[11]] ^ > + t10_dif_crc_table[3][i[12]] ^ > + t10_dif_crc_table[2][i[13]] ^ > + t10_dif_crc_table[1][i[14]] ^ > + t10_dif_crc_table[0][i[15]]; > + } Please indent this properly. crc = t10_dif_crc_table[15][i[0] ^ (__u8)(crc >> 8)] ^ t10_dif_crc_table[14][i[1] ^ (__u8)(crc >> 0)] ^ t10_dif_crc_table[13][i[2]] ^ t10_dif_crc_table[12][i[3]] ^ t10_dif_crc_table[11][i[4]] ^ ... - Eric
Hi, Rather than present this formerly as an alternate patch, attached is a clean-up of my patch which uses the variable size table proposed by Joe Perches <joe@perches.com> and is based on the original patch that started this thread. Doug Gilbert On 2018-08-16 10:02 AM, Jeffrey Lien wrote: > Eric, > We did not test the slice by 4 or 8 tables. I'm not sure of the value of doing that since the slice by 16 will provide the best performance gain. If I'm missing anything here, please let me know. > > I'm working on a new version of the patch based on the feedback from others and will also change the pointer variables to start with p and fix the indenting you mentioned below in the new version of the patch. > > Thanks > > Jeff Lien > > -----Original Message----- > From: Eric Biggers [mailto:ebiggers@kernel.org] > Sent: Friday, August 10, 2018 3:16 PM > To: Jeffrey Lien <Jeff.Lien@wdc.com> > Cc: linux-kernel@vger.kernel.org; linux-crypto@vger.kernel.org; linux-block@vger.kernel.org; linux-scsi@vger.kernel.org; herbert@gondor.apana.org.au; tim.c.chen@linux.intel.com; martin.petersen@oracle.com; David Darrington <david.darrington@wdc.com>; Jeff Furlong <jeff.furlong@wdc.com> > Subject: Re: [PATCH] Performance Improvement in CRC16 Calculations. > > On Fri, Aug 10, 2018 at 02:12:11PM -0500, Jeff Lien wrote: >> This patch provides a performance improvement for the CRC16 >> calculations done in read/write workloads using the T10 Type 1/2/3 >> guard field. For example, today with sequential write workloads (one >> thread/CPU of IO) we consume 100% of the CPU because of the CRC16 >> computation bottleneck. Today's block devices are considerably >> faster, but the CRC16 calculation prevents folks from utilizing the >> throughput of such devices. To speed up this calculation and expose >> the block device throughput, we slice the old single byte for loop into a 16 byte for loop, with a larger CRC table to match. The result has shown 5x performance improvements on various big endian and little endian systems running the 4.18.0 kernel version. >> >> FIO Sequential Write, 64K Block Size, Queue Depth 64 >> BE Base Kernel: bw=201.5 MiB/s >> BE Modified CRC Calc: bw=968.1 MiB/s >> 4.80x performance improvement >> >> LE Base Kernel: bw=357 MiB/s >> LE Modified CRC Calc: bw=1964 MiB/s >> 5.51x performance improvement >> >> FIO Sequential Read, 64K Block Size, Queue Depth 64 >> BE Base Kernel: bw=611.2 MiB/s >> BE Modified CRC calc: bw=684.9 MiB/s >> 1.12x performance improvement >> >> LE Base Kernel: bw=797 MiB/s >> LE Modified CRC Calc: bw=2730 MiB/s >> 3.42x performance improvement > > Did you also test the slice-by-4 (requires 2048-byte table) and slice-by-8 (requires 4096-byte table) methods? Your proposal is slice-by-16 (requires 8192-byte table); the original was slice-by-1 (requires 512-byte table). > >> __u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, >> size_t len) { >> - unsigned int i; >> + const __u8 *i = (const __u8 *)buffer; >> + const __u8 *i_end = i + len; >> + const __u8 *i_last16 = i + (len / 16 * 16); > > 'i' is normally a loop counter, not a pointer. > Use 'p', 'p_end', and 'p_last16'. > >> >> - for (i = 0 ; i < len ; i++) >> - crc = (crc << 8) ^ t10_dif_crc_table[((crc >> 8) ^ buffer[i]) & 0xff]; >> + for (; i < i_last16; i += 16) { >> + crc = t10_dif_crc_table[15][i[0] ^ (__u8)(crc >> 8)] ^ >> + t10_dif_crc_table[14][i[1] ^ (__u8)(crc >> 0)] ^ >> + t10_dif_crc_table[13][i[2]] ^ >> + t10_dif_crc_table[12][i[3]] ^ >> + t10_dif_crc_table[11][i[4]] ^ >> + t10_dif_crc_table[10][i[5]] ^ >> + t10_dif_crc_table[9][i[6]] ^ >> + t10_dif_crc_table[8][i[7]] ^ >> + t10_dif_crc_table[7][i[8]] ^ >> + t10_dif_crc_table[6][i[9]] ^ >> + t10_dif_crc_table[5][i[10]] ^ >> + t10_dif_crc_table[4][i[11]] ^ >> + t10_dif_crc_table[3][i[12]] ^ >> + t10_dif_crc_table[2][i[13]] ^ >> + t10_dif_crc_table[1][i[14]] ^ >> + t10_dif_crc_table[0][i[15]]; >> + } > > Please indent this properly. > > crc = t10_dif_crc_table[15][i[0] ^ (__u8)(crc >> 8)] ^ > t10_dif_crc_table[14][i[1] ^ (__u8)(crc >> 0)] ^ > t10_dif_crc_table[13][i[2]] ^ > t10_dif_crc_table[12][i[3]] ^ > t10_dif_crc_table[11][i[4]] ^ > ... > > - Eric > From 8aa972ed3c84bdc02b6acaf52a155018e6076084 Mon Sep 17 00:00:00 2001 From: Douglas Gilbert <dgilbert@interlog.com> Date: Thu, 16 Aug 2018 00:03:14 -0400 Subject: [PATCH alternative 1] T10 CRC16 function, build time sized table Incorporate suggestions from various sources to speed up the CRC-16 T10 Protection Information (DIF) calculation. Use a kernel build time parameter to size the lookup table. Transform the two dimensional table lookup into one dimension and use some pointer arithmetic to streamline the calculation. Signed-off-by: Douglas Gilbert <dgilbert@interlog.com> --- This effort was started by a post from Jeff Lien <jeff.lien@wdc.com> titled: "[PATCH] Performance Improvement in CRC16 Calculations." on 20180810. Various people responded including a patch from Joe Perches <joe@perches.com> which added the concept of a kernel build time parameter to control table size. Some benchmarks show this patch around 20% faster than that presenter by Joe, other benchmarks show no gain. crypto/Kconfig | 10 + crypto/crct10dif_common.c | 556 +++++++++++++++++++++++++++++++++++++- 2 files changed, 562 insertions(+), 4 deletions(-) diff --git a/crypto/Kconfig b/crypto/Kconfig index f3e40ac56d93..88d9d17bb18a 100644 --- a/crypto/Kconfig +++ b/crypto/Kconfig @@ -618,6 +618,16 @@ config CRYPTO_CRCT10DIF a crypto transform. This allows for faster crc t10 diff transforms to be used if they are available. +config CRYPTO_CRCT10DIF_TABLE_SIZE + int "Size of CRCT10DIF crc tables (as a power of 2)" + depends on CRYPTO_CRCT10DIF + range 1 5 + default 1 if EMBEDDED + default 5 + help + Set the table size used by the CRYPTO_CRCT10DIF crc calculation + Larger values use more memory and are faster. + config CRYPTO_CRCT10DIF_PCLMUL tristate "CRCT10DIF PCLMULQDQ hardware acceleration" depends on X86 && 64BIT && CRC_T10DIF diff --git a/crypto/crct10dif_common.c b/crypto/crct10dif_common.c index b2fab366f518..451163cd9584 100644 --- a/crypto/crct10dif_common.c +++ b/crypto/crct10dif_common.c @@ -28,11 +28,14 @@ #include <linux/module.h> #include <linux/kernel.h> +#define CRC_TBL_NUM_COLS 256 + /* Table generated using the following polynomium: * x^16 + x^15 + x^11 + x^9 + x^8 + x^7 + x^5 + x^4 + x^2 + x + 1 * gt: 0x8bb7 */ -static const __u16 t10_dif_crc_table[256] = { +static const __u16 t10dif_crc_table[][CRC_TBL_NUM_COLS] = { + { 0x0000, 0x8BB7, 0x9CD9, 0x176E, 0xB205, 0x39B2, 0x2EDC, 0xA56B, 0xEFBD, 0x640A, 0x7364, 0xF8D3, 0x5DB8, 0xD60F, 0xC161, 0x4AD6, 0x54CD, 0xDF7A, 0xC814, 0x43A3, 0xE6C8, 0x6D7F, 0x7A11, 0xF1A6, @@ -65,14 +68,559 @@ static const __u16 t10_dif_crc_table[256] = { 0xA415, 0x2FA2, 0x38CC, 0xB37B, 0x1610, 0x9DA7, 0x8AC9, 0x017E, 0x1F65, 0x94D2, 0x83BC, 0x080B, 0xAD60, 0x26D7, 0x31B9, 0xBA0E, 0xF0D8, 0x7B6F, 0x6C01, 0xE7B6, 0x42DD, 0xC96A, 0xDE04, 0x55B3 + }, +#if CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE >= 2 + { + 0x0000, 0x7562, 0xEAC4, 0x9FA6, 0x5E3F, 0x2B5D, 0xB4FB, 0xC199, + 0xBC7E, 0xC91C, 0x56BA, 0x23D8, 0xE241, 0x9723, 0x0885, 0x7DE7, + 0xF34B, 0x8629, 0x198F, 0x6CED, 0xAD74, 0xD816, 0x47B0, 0x32D2, + 0x4F35, 0x3A57, 0xA5F1, 0xD093, 0x110A, 0x6468, 0xFBCE, 0x8EAC, + 0x6D21, 0x1843, 0x87E5, 0xF287, 0x331E, 0x467C, 0xD9DA, 0xACB8, + 0xD15F, 0xA43D, 0x3B9B, 0x4EF9, 0x8F60, 0xFA02, 0x65A4, 0x10C6, + 0x9E6A, 0xEB08, 0x74AE, 0x01CC, 0xC055, 0xB537, 0x2A91, 0x5FF3, + 0x2214, 0x5776, 0xC8D0, 0xBDB2, 0x7C2B, 0x0949, 0x96EF, 0xE38D, + 0xDA42, 0xAF20, 0x3086, 0x45E4, 0x847D, 0xF11F, 0x6EB9, 0x1BDB, + 0x663C, 0x135E, 0x8CF8, 0xF99A, 0x3803, 0x4D61, 0xD2C7, 0xA7A5, + 0x2909, 0x5C6B, 0xC3CD, 0xB6AF, 0x7736, 0x0254, 0x9DF2, 0xE890, + 0x9577, 0xE015, 0x7FB3, 0x0AD1, 0xCB48, 0xBE2A, 0x218C, 0x54EE, + 0xB763, 0xC201, 0x5DA7, 0x28C5, 0xE95C, 0x9C3E, 0x0398, 0x76FA, + 0x0B1D, 0x7E7F, 0xE1D9, 0x94BB, 0x5522, 0x2040, 0xBFE6, 0xCA84, + 0x4428, 0x314A, 0xAEEC, 0xDB8E, 0x1A17, 0x6F75, 0xF0D3, 0x85B1, + 0xF856, 0x8D34, 0x1292, 0x67F0, 0xA669, 0xD30B, 0x4CAD, 0x39CF, + 0x3F33, 0x4A51, 0xD5F7, 0xA095, 0x610C, 0x146E, 0x8BC8, 0xFEAA, + 0x834D, 0xF62F, 0x6989, 0x1CEB, 0xDD72, 0xA810, 0x37B6, 0x42D4, + 0xCC78, 0xB91A, 0x26BC, 0x53DE, 0x9247, 0xE725, 0x7883, 0x0DE1, + 0x7006, 0x0564, 0x9AC2, 0xEFA0, 0x2E39, 0x5B5B, 0xC4FD, 0xB19F, + 0x5212, 0x2770, 0xB8D6, 0xCDB4, 0x0C2D, 0x794F, 0xE6E9, 0x938B, + 0xEE6C, 0x9B0E, 0x04A8, 0x71CA, 0xB053, 0xC531, 0x5A97, 0x2FF5, + 0xA159, 0xD43B, 0x4B9D, 0x3EFF, 0xFF66, 0x8A04, 0x15A2, 0x60C0, + 0x1D27, 0x6845, 0xF7E3, 0x8281, 0x4318, 0x367A, 0xA9DC, 0xDCBE, + 0xE571, 0x9013, 0x0FB5, 0x7AD7, 0xBB4E, 0xCE2C, 0x518A, 0x24E8, + 0x590F, 0x2C6D, 0xB3CB, 0xC6A9, 0x0730, 0x7252, 0xEDF4, 0x9896, + 0x163A, 0x6358, 0xFCFE, 0x899C, 0x4805, 0x3D67, 0xA2C1, 0xD7A3, + 0xAA44, 0xDF26, 0x4080, 0x35E2, 0xF47B, 0x8119, 0x1EBF, 0x6BDD, + 0x8850, 0xFD32, 0x6294, 0x17F6, 0xD66F, 0xA30D, 0x3CAB, 0x49C9, + 0x342E, 0x414C, 0xDEEA, 0xAB88, 0x6A11, 0x1F73, 0x80D5, 0xF5B7, + 0x7B1B, 0x0E79, 0x91DF, 0xE4BD, 0x2524, 0x5046, 0xCFE0, 0xBA82, + 0xC765, 0xB207, 0x2DA1, 0x58C3, 0x995A, 0xEC38, 0x739E, 0x06FC + }, +#endif +#if CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE >= 3 + { + 0x0000, 0x7E66, 0xFCCC, 0x82AA, 0x722F, 0x0C49, 0x8EE3, 0xF085, + 0xE45E, 0x9A38, 0x1892, 0x66F4, 0x9671, 0xE817, 0x6ABD, 0x14DB, + 0x430B, 0x3D6D, 0xBFC7, 0xC1A1, 0x3124, 0x4F42, 0xCDE8, 0xB38E, + 0xA755, 0xD933, 0x5B99, 0x25FF, 0xD57A, 0xAB1C, 0x29B6, 0x57D0, + 0x8616, 0xF870, 0x7ADA, 0x04BC, 0xF439, 0x8A5F, 0x08F5, 0x7693, + 0x6248, 0x1C2E, 0x9E84, 0xE0E2, 0x1067, 0x6E01, 0xECAB, 0x92CD, + 0xC51D, 0xBB7B, 0x39D1, 0x47B7, 0xB732, 0xC954, 0x4BFE, 0x3598, + 0x2143, 0x5F25, 0xDD8F, 0xA3E9, 0x536C, 0x2D0A, 0xAFA0, 0xD1C6, + 0x879B, 0xF9FD, 0x7B57, 0x0531, 0xF5B4, 0x8BD2, 0x0978, 0x771E, + 0x63C5, 0x1DA3, 0x9F09, 0xE16F, 0x11EA, 0x6F8C, 0xED26, 0x9340, + 0xC490, 0xBAF6, 0x385C, 0x463A, 0xB6BF, 0xC8D9, 0x4A73, 0x3415, + 0x20CE, 0x5EA8, 0xDC02, 0xA264, 0x52E1, 0x2C87, 0xAE2D, 0xD04B, + 0x018D, 0x7FEB, 0xFD41, 0x8327, 0x73A2, 0x0DC4, 0x8F6E, 0xF108, + 0xE5D3, 0x9BB5, 0x191F, 0x6779, 0x97FC, 0xE99A, 0x6B30, 0x1556, + 0x4286, 0x3CE0, 0xBE4A, 0xC02C, 0x30A9, 0x4ECF, 0xCC65, 0xB203, + 0xA6D8, 0xD8BE, 0x5A14, 0x2472, 0xD4F7, 0xAA91, 0x283B, 0x565D, + 0x8481, 0xFAE7, 0x784D, 0x062B, 0xF6AE, 0x88C8, 0x0A62, 0x7404, + 0x60DF, 0x1EB9, 0x9C13, 0xE275, 0x12F0, 0x6C96, 0xEE3C, 0x905A, + 0xC78A, 0xB9EC, 0x3B46, 0x4520, 0xB5A5, 0xCBC3, 0x4969, 0x370F, + 0x23D4, 0x5DB2, 0xDF18, 0xA17E, 0x51FB, 0x2F9D, 0xAD37, 0xD351, + 0x0297, 0x7CF1, 0xFE5B, 0x803D, 0x70B8, 0x0EDE, 0x8C74, 0xF212, + 0xE6C9, 0x98AF, 0x1A05, 0x6463, 0x94E6, 0xEA80, 0x682A, 0x164C, + 0x419C, 0x3FFA, 0xBD50, 0xC336, 0x33B3, 0x4DD5, 0xCF7F, 0xB119, + 0xA5C2, 0xDBA4, 0x590E, 0x2768, 0xD7ED, 0xA98B, 0x2B21, 0x5547, + 0x031A, 0x7D7C, 0xFFD6, 0x81B0, 0x7135, 0x0F53, 0x8DF9, 0xF39F, + 0xE744, 0x9922, 0x1B88, 0x65EE, 0x956B, 0xEB0D, 0x69A7, 0x17C1, + 0x4011, 0x3E77, 0xBCDD, 0xC2BB, 0x323E, 0x4C58, 0xCEF2, 0xB094, + 0xA44F, 0xDA29, 0x5883, 0x26E5, 0xD660, 0xA806, 0x2AAC, 0x54CA, + 0x850C, 0xFB6A, 0x79C0, 0x07A6, 0xF723, 0x8945, 0x0BEF, 0x7589, + 0x6152, 0x1F34, 0x9D9E, 0xE3F8, 0x137D, 0x6D1B, 0xEFB1, 0x91D7, + 0xC607, 0xB861, 0x3ACB, 0x44AD, 0xB428, 0xCA4E, 0x48E4, 0x3682, + 0x2259, 0x5C3F, 0xDE95, 0xA0F3, 0x5076, 0x2E10, 0xACBA, 0xD2DC + }, + { + 0x0000, 0x82B5, 0x8EDD, 0x0C68, 0x960D, 0x14B8, 0x18D0, 0x9A65, + 0xA7AD, 0x2518, 0x2970, 0xABC5, 0x31A0, 0xB315, 0xBF7D, 0x3DC8, + 0xC4ED, 0x4658, 0x4A30, 0xC885, 0x52E0, 0xD055, 0xDC3D, 0x5E88, + 0x6340, 0xE1F5, 0xED9D, 0x6F28, 0xF54D, 0x77F8, 0x7B90, 0xF925, + 0x026D, 0x80D8, 0x8CB0, 0x0E05, 0x9460, 0x16D5, 0x1ABD, 0x9808, + 0xA5C0, 0x2775, 0x2B1D, 0xA9A8, 0x33CD, 0xB178, 0xBD10, 0x3FA5, + 0xC680, 0x4435, 0x485D, 0xCAE8, 0x508D, 0xD238, 0xDE50, 0x5CE5, + 0x612D, 0xE398, 0xEFF0, 0x6D45, 0xF720, 0x7595, 0x79FD, 0xFB48, + 0x04DA, 0x866F, 0x8A07, 0x08B2, 0x92D7, 0x1062, 0x1C0A, 0x9EBF, + 0xA377, 0x21C2, 0x2DAA, 0xAF1F, 0x357A, 0xB7CF, 0xBBA7, 0x3912, + 0xC037, 0x4282, 0x4EEA, 0xCC5F, 0x563A, 0xD48F, 0xD8E7, 0x5A52, + 0x679A, 0xE52F, 0xE947, 0x6BF2, 0xF197, 0x7322, 0x7F4A, 0xFDFF, + 0x06B7, 0x8402, 0x886A, 0x0ADF, 0x90BA, 0x120F, 0x1E67, 0x9CD2, + 0xA11A, 0x23AF, 0x2FC7, 0xAD72, 0x3717, 0xB5A2, 0xB9CA, 0x3B7F, + 0xC25A, 0x40EF, 0x4C87, 0xCE32, 0x5457, 0xD6E2, 0xDA8A, 0x583F, + 0x65F7, 0xE742, 0xEB2A, 0x699F, 0xF3FA, 0x714F, 0x7D27, 0xFF92, + 0x09B4, 0x8B01, 0x8769, 0x05DC, 0x9FB9, 0x1D0C, 0x1164, 0x93D1, + 0xAE19, 0x2CAC, 0x20C4, 0xA271, 0x3814, 0xBAA1, 0xB6C9, 0x347C, + 0xCD59, 0x4FEC, 0x4384, 0xC131, 0x5B54, 0xD9E1, 0xD589, 0x573C, + 0x6AF4, 0xE841, 0xE429, 0x669C, 0xFCF9, 0x7E4C, 0x7224, 0xF091, + 0x0BD9, 0x896C, 0x8504, 0x07B1, 0x9DD4, 0x1F61, 0x1309, 0x91BC, + 0xAC74, 0x2EC1, 0x22A9, 0xA01C, 0x3A79, 0xB8CC, 0xB4A4, 0x3611, + 0xCF34, 0x4D81, 0x41E9, 0xC35C, 0x5939, 0xDB8C, 0xD7E4, 0x5551, + 0x6899, 0xEA2C, 0xE644, 0x64F1, 0xFE94, 0x7C21, 0x7049, 0xF2FC, + 0x0D6E, 0x8FDB, 0x83B3, 0x0106, 0x9B63, 0x19D6, 0x15BE, 0x970B, + 0xAAC3, 0x2876, 0x241E, 0xA6AB, 0x3CCE, 0xBE7B, 0xB213, 0x30A6, + 0xC983, 0x4B36, 0x475E, 0xC5EB, 0x5F8E, 0xDD3B, 0xD153, 0x53E6, + 0x6E2E, 0xEC9B, 0xE0F3, 0x6246, 0xF823, 0x7A96, 0x76FE, 0xF44B, + 0x0F03, 0x8DB6, 0x81DE, 0x036B, 0x990E, 0x1BBB, 0x17D3, 0x9566, + 0xA8AE, 0x2A1B, 0x2673, 0xA4C6, 0x3EA3, 0xBC16, 0xB07E, 0x32CB, + 0xCBEE, 0x495B, 0x4533, 0xC786, 0x5DE3, 0xDF56, 0xD33E, 0x518B, + 0x6C43, 0xEEF6, 0xE29E, 0x602B, 0xFA4E, 0x78FB, 0x7493, 0xF626 + }, +#endif +#if CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE >= 4 + { + 0x0000, 0x1368, 0x26D0, 0x35B8, 0x4DA0, 0x5EC8, 0x6B70, 0x7818, + 0x9B40, 0x8828, 0xBD90, 0xAEF8, 0xD6E0, 0xC588, 0xF030, 0xE358, + 0xBD37, 0xAE5F, 0x9BE7, 0x888F, 0xF097, 0xE3FF, 0xD647, 0xC52F, + 0x2677, 0x351F, 0x00A7, 0x13CF, 0x6BD7, 0x78BF, 0x4D07, 0x5E6F, + 0xF1D9, 0xE2B1, 0xD709, 0xC461, 0xBC79, 0xAF11, 0x9AA9, 0x89C1, + 0x6A99, 0x79F1, 0x4C49, 0x5F21, 0x2739, 0x3451, 0x01E9, 0x1281, + 0x4CEE, 0x5F86, 0x6A3E, 0x7956, 0x014E, 0x1226, 0x279E, 0x34F6, + 0xD7AE, 0xC4C6, 0xF17E, 0xE216, 0x9A0E, 0x8966, 0xBCDE, 0xAFB6, + 0x6805, 0x7B6D, 0x4ED5, 0x5DBD, 0x25A5, 0x36CD, 0x0375, 0x101D, + 0xF345, 0xE02D, 0xD595, 0xC6FD, 0xBEE5, 0xAD8D, 0x9835, 0x8B5D, + 0xD532, 0xC65A, 0xF3E2, 0xE08A, 0x9892, 0x8BFA, 0xBE42, 0xAD2A, + 0x4E72, 0x5D1A, 0x68A2, 0x7BCA, 0x03D2, 0x10BA, 0x2502, 0x366A, + 0x99DC, 0x8AB4, 0xBF0C, 0xAC64, 0xD47C, 0xC714, 0xF2AC, 0xE1C4, + 0x029C, 0x11F4, 0x244C, 0x3724, 0x4F3C, 0x5C54, 0x69EC, 0x7A84, + 0x24EB, 0x3783, 0x023B, 0x1153, 0x694B, 0x7A23, 0x4F9B, 0x5CF3, + 0xBFAB, 0xACC3, 0x997B, 0x8A13, 0xF20B, 0xE163, 0xD4DB, 0xC7B3, + 0xD00A, 0xC362, 0xF6DA, 0xE5B2, 0x9DAA, 0x8EC2, 0xBB7A, 0xA812, + 0x4B4A, 0x5822, 0x6D9A, 0x7EF2, 0x06EA, 0x1582, 0x203A, 0x3352, + 0x6D3D, 0x7E55, 0x4BED, 0x5885, 0x209D, 0x33F5, 0x064D, 0x1525, + 0xF67D, 0xE515, 0xD0AD, 0xC3C5, 0xBBDD, 0xA8B5, 0x9D0D, 0x8E65, + 0x21D3, 0x32BB, 0x0703, 0x146B, 0x6C73, 0x7F1B, 0x4AA3, 0x59CB, + 0xBA93, 0xA9FB, 0x9C43, 0x8F2B, 0xF733, 0xE45B, 0xD1E3, 0xC28B, + 0x9CE4, 0x8F8C, 0xBA34, 0xA95C, 0xD144, 0xC22C, 0xF794, 0xE4FC, + 0x07A4, 0x14CC, 0x2174, 0x321C, 0x4A04, 0x596C, 0x6CD4, 0x7FBC, + 0xB80F, 0xAB67, 0x9EDF, 0x8DB7, 0xF5AF, 0xE6C7, 0xD37F, 0xC017, + 0x234F, 0x3027, 0x059F, 0x16F7, 0x6EEF, 0x7D87, 0x483F, 0x5B57, + 0x0538, 0x1650, 0x23E8, 0x3080, 0x4898, 0x5BF0, 0x6E48, 0x7D20, + 0x9E78, 0x8D10, 0xB8A8, 0xABC0, 0xD3D8, 0xC0B0, 0xF508, 0xE660, + 0x49D6, 0x5ABE, 0x6F06, 0x7C6E, 0x0476, 0x171E, 0x22A6, 0x31CE, + 0xD296, 0xC1FE, 0xF446, 0xE72E, 0x9F36, 0x8C5E, 0xB9E6, 0xAA8E, + 0xF4E1, 0xE789, 0xD231, 0xC159, 0xB941, 0xAA29, 0x9F91, 0x8CF9, + 0x6FA1, 0x7CC9, 0x4971, 0x5A19, 0x2201, 0x3169, 0x04D1, 0x17B9 + }, + { + 0x0000, 0x2BA3, 0x5746, 0x7CE5, 0xAE8C, 0x852F, 0xF9CA, 0xD269, + 0xD6AF, 0xFD0C, 0x81E9, 0xAA4A, 0x7823, 0x5380, 0x2F65, 0x04C6, + 0x26E9, 0x0D4A, 0x71AF, 0x5A0C, 0x8865, 0xA3C6, 0xDF23, 0xF480, + 0xF046, 0xDBE5, 0xA700, 0x8CA3, 0x5ECA, 0x7569, 0x098C, 0x222F, + 0x4DD2, 0x6671, 0x1A94, 0x3137, 0xE35E, 0xC8FD, 0xB418, 0x9FBB, + 0x9B7D, 0xB0DE, 0xCC3B, 0xE798, 0x35F1, 0x1E52, 0x62B7, 0x4914, + 0x6B3B, 0x4098, 0x3C7D, 0x17DE, 0xC5B7, 0xEE14, 0x92F1, 0xB952, + 0xBD94, 0x9637, 0xEAD2, 0xC171, 0x1318, 0x38BB, 0x445E, 0x6FFD, + 0x9BA4, 0xB007, 0xCCE2, 0xE741, 0x3528, 0x1E8B, 0x626E, 0x49CD, + 0x4D0B, 0x66A8, 0x1A4D, 0x31EE, 0xE387, 0xC824, 0xB4C1, 0x9F62, + 0xBD4D, 0x96EE, 0xEA0B, 0xC1A8, 0x13C1, 0x3862, 0x4487, 0x6F24, + 0x6BE2, 0x4041, 0x3CA4, 0x1707, 0xC56E, 0xEECD, 0x9228, 0xB98B, + 0xD676, 0xFDD5, 0x8130, 0xAA93, 0x78FA, 0x5359, 0x2FBC, 0x041F, + 0x00D9, 0x2B7A, 0x579F, 0x7C3C, 0xAE55, 0x85F6, 0xF913, 0xD2B0, + 0xF09F, 0xDB3C, 0xA7D9, 0x8C7A, 0x5E13, 0x75B0, 0x0955, 0x22F6, + 0x2630, 0x0D93, 0x7176, 0x5AD5, 0x88BC, 0xA31F, 0xDFFA, 0xF459, + 0xBCFF, 0x975C, 0xEBB9, 0xC01A, 0x1273, 0x39D0, 0x4535, 0x6E96, + 0x6A50, 0x41F3, 0x3D16, 0x16B5, 0xC4DC, 0xEF7F, 0x939A, 0xB839, + 0x9A16, 0xB1B5, 0xCD50, 0xE6F3, 0x349A, 0x1F39, 0x63DC, 0x487F, + 0x4CB9, 0x671A, 0x1BFF, 0x305C, 0xE235, 0xC996, 0xB573, 0x9ED0, + 0xF12D, 0xDA8E, 0xA66B, 0x8DC8, 0x5FA1, 0x7402, 0x08E7, 0x2344, + 0x2782, 0x0C21, 0x70C4, 0x5B67, 0x890E, 0xA2AD, 0xDE48, 0xF5EB, + 0xD7C4, 0xFC67, 0x8082, 0xAB21, 0x7948, 0x52EB, 0x2E0E, 0x05AD, + 0x016B, 0x2AC8, 0x562D, 0x7D8E, 0xAFE7, 0x8444, 0xF8A1, 0xD302, + 0x275B, 0x0CF8, 0x701D, 0x5BBE, 0x89D7, 0xA274, 0xDE91, 0xF532, + 0xF1F4, 0xDA57, 0xA6B2, 0x8D11, 0x5F78, 0x74DB, 0x083E, 0x239D, + 0x01B2, 0x2A11, 0x56F4, 0x7D57, 0xAF3E, 0x849D, 0xF878, 0xD3DB, + 0xD71D, 0xFCBE, 0x805B, 0xABF8, 0x7991, 0x5232, 0x2ED7, 0x0574, + 0x6A89, 0x412A, 0x3DCF, 0x166C, 0xC405, 0xEFA6, 0x9343, 0xB8E0, + 0xBC26, 0x9785, 0xEB60, 0xC0C3, 0x12AA, 0x3909, 0x45EC, 0x6E4F, + 0x4C60, 0x67C3, 0x1B26, 0x3085, 0xE2EC, 0xC94F, 0xB5AA, 0x9E09, + 0x9ACF, 0xB16C, 0xCD89, 0xE62A, 0x3443, 0x1FE0, 0x6305, 0x48A6 + }, + { + 0x0000, 0xF249, 0x6F25, 0x9D6C, 0xDE4A, 0x2C03, 0xB16F, 0x4326, + 0x3723, 0xC56A, 0x5806, 0xAA4F, 0xE969, 0x1B20, 0x864C, 0x7405, + 0x6E46, 0x9C0F, 0x0163, 0xF32A, 0xB00C, 0x4245, 0xDF29, 0x2D60, + 0x5965, 0xAB2C, 0x3640, 0xC409, 0x872F, 0x7566, 0xE80A, 0x1A43, + 0xDC8C, 0x2EC5, 0xB3A9, 0x41E0, 0x02C6, 0xF08F, 0x6DE3, 0x9FAA, + 0xEBAF, 0x19E6, 0x848A, 0x76C3, 0x35E5, 0xC7AC, 0x5AC0, 0xA889, + 0xB2CA, 0x4083, 0xDDEF, 0x2FA6, 0x6C80, 0x9EC9, 0x03A5, 0xF1EC, + 0x85E9, 0x77A0, 0xEACC, 0x1885, 0x5BA3, 0xA9EA, 0x3486, 0xC6CF, + 0x32AF, 0xC0E6, 0x5D8A, 0xAFC3, 0xECE5, 0x1EAC, 0x83C0, 0x7189, + 0x058C, 0xF7C5, 0x6AA9, 0x98E0, 0xDBC6, 0x298F, 0xB4E3, 0x46AA, + 0x5CE9, 0xAEA0, 0x33CC, 0xC185, 0x82A3, 0x70EA, 0xED86, 0x1FCF, + 0x6BCA, 0x9983, 0x04EF, 0xF6A6, 0xB580, 0x47C9, 0xDAA5, 0x28EC, + 0xEE23, 0x1C6A, 0x8106, 0x734F, 0x3069, 0xC220, 0x5F4C, 0xAD05, + 0xD900, 0x2B49, 0xB625, 0x446C, 0x074A, 0xF503, 0x686F, 0x9A26, + 0x8065, 0x722C, 0xEF40, 0x1D09, 0x5E2F, 0xAC66, 0x310A, 0xC343, + 0xB746, 0x450F, 0xD863, 0x2A2A, 0x690C, 0x9B45, 0x0629, 0xF460, + 0x655E, 0x9717, 0x0A7B, 0xF832, 0xBB14, 0x495D, 0xD431, 0x2678, + 0x527D, 0xA034, 0x3D58, 0xCF11, 0x8C37, 0x7E7E, 0xE312, 0x115B, + 0x0B18, 0xF951, 0x643D, 0x9674, 0xD552, 0x271B, 0xBA77, 0x483E, + 0x3C3B, 0xCE72, 0x531E, 0xA157, 0xE271, 0x1038, 0x8D54, 0x7F1D, + 0xB9D2, 0x4B9B, 0xD6F7, 0x24BE, 0x6798, 0x95D1, 0x08BD, 0xFAF4, + 0x8EF1, 0x7CB8, 0xE1D4, 0x139D, 0x50BB, 0xA2F2, 0x3F9E, 0xCDD7, + 0xD794, 0x25DD, 0xB8B1, 0x4AF8, 0x09DE, 0xFB97, 0x66FB, 0x94B2, + 0xE0B7, 0x12FE, 0x8F92, 0x7DDB, 0x3EFD, 0xCCB4, 0x51D8, 0xA391, + 0x57F1, 0xA5B8, 0x38D4, 0xCA9D, 0x89BB, 0x7BF2, 0xE69E, 0x14D7, + 0x60D2, 0x929B, 0x0FF7, 0xFDBE, 0xBE98, 0x4CD1, 0xD1BD, 0x23F4, + 0x39B7, 0xCBFE, 0x5692, 0xA4DB, 0xE7FD, 0x15B4, 0x88D8, 0x7A91, + 0x0E94, 0xFCDD, 0x61B1, 0x93F8, 0xD0DE, 0x2297, 0xBFFB, 0x4DB2, + 0x8B7D, 0x7934, 0xE458, 0x1611, 0x5537, 0xA77E, 0x3A12, 0xC85B, + 0xBC5E, 0x4E17, 0xD37B, 0x2132, 0x6214, 0x905D, 0x0D31, 0xFF78, + 0xE53B, 0x1772, 0x8A1E, 0x7857, 0x3B71, 0xC938, 0x5454, 0xA61D, + 0xD218, 0x2051, 0xBD3D, 0x4F74, 0x0C52, 0xFE1B, 0x6377, 0x913E + }, + { + 0x0000, 0xCABC, 0x1ECF, 0xD473, 0x3D9E, 0xF722, 0x2351, 0xE9ED, + 0x7B3C, 0xB180, 0x65F3, 0xAF4F, 0x46A2, 0x8C1E, 0x586D, 0x92D1, + 0xF678, 0x3CC4, 0xE8B7, 0x220B, 0xCBE6, 0x015A, 0xD529, 0x1F95, + 0x8D44, 0x47F8, 0x938B, 0x5937, 0xB0DA, 0x7A66, 0xAE15, 0x64A9, + 0x6747, 0xADFB, 0x7988, 0xB334, 0x5AD9, 0x9065, 0x4416, 0x8EAA, + 0x1C7B, 0xD6C7, 0x02B4, 0xC808, 0x21E5, 0xEB59, 0x3F2A, 0xF596, + 0x913F, 0x5B83, 0x8FF0, 0x454C, 0xACA1, 0x661D, 0xB26E, 0x78D2, + 0xEA03, 0x20BF, 0xF4CC, 0x3E70, 0xD79D, 0x1D21, 0xC952, 0x03EE, + 0xCE8E, 0x0432, 0xD041, 0x1AFD, 0xF310, 0x39AC, 0xEDDF, 0x2763, + 0xB5B2, 0x7F0E, 0xAB7D, 0x61C1, 0x882C, 0x4290, 0x96E3, 0x5C5F, + 0x38F6, 0xF24A, 0x2639, 0xEC85, 0x0568, 0xCFD4, 0x1BA7, 0xD11B, + 0x43CA, 0x8976, 0x5D05, 0x97B9, 0x7E54, 0xB4E8, 0x609B, 0xAA27, + 0xA9C9, 0x6375, 0xB706, 0x7DBA, 0x9457, 0x5EEB, 0x8A98, 0x4024, + 0xD2F5, 0x1849, 0xCC3A, 0x0686, 0xEF6B, 0x25D7, 0xF1A4, 0x3B18, + 0x5FB1, 0x950D, 0x417E, 0x8BC2, 0x622F, 0xA893, 0x7CE0, 0xB65C, + 0x248D, 0xEE31, 0x3A42, 0xF0FE, 0x1913, 0xD3AF, 0x07DC, 0xCD60, + 0x16AB, 0xDC17, 0x0864, 0xC2D8, 0x2B35, 0xE189, 0x35FA, 0xFF46, + 0x6D97, 0xA72B, 0x7358, 0xB9E4, 0x5009, 0x9AB5, 0x4EC6, 0x847A, + 0xE0D3, 0x2A6F, 0xFE1C, 0x34A0, 0xDD4D, 0x17F1, 0xC382, 0x093E, + 0x9BEF, 0x5153, 0x8520, 0x4F9C, 0xA671, 0x6CCD, 0xB8BE, 0x7202, + 0x71EC, 0xBB50, 0x6F23, 0xA59F, 0x4C72, 0x86CE, 0x52BD, 0x9801, + 0x0AD0, 0xC06C, 0x141F, 0xDEA3, 0x374E, 0xFDF2, 0x2981, 0xE33D, + 0x8794, 0x4D28, 0x995B, 0x53E7, 0xBA0A, 0x70B6, 0xA4C5, 0x6E79, + 0xFCA8, 0x3614, 0xE267, 0x28DB, 0xC136, 0x0B8A, 0xDFF9, 0x1545, + 0xD825, 0x1299, 0xC6EA, 0x0C56, 0xE5BB, 0x2F07, 0xFB74, 0x31C8, + 0xA319, 0x69A5, 0xBDD6, 0x776A, 0x9E87, 0x543B, 0x8048, 0x4AF4, + 0x2E5D, 0xE4E1, 0x3092, 0xFA2E, 0x13C3, 0xD97F, 0x0D0C, 0xC7B0, + 0x5561, 0x9FDD, 0x4BAE, 0x8112, 0x68FF, 0xA243, 0x7630, 0xBC8C, + 0xBF62, 0x75DE, 0xA1AD, 0x6B11, 0x82FC, 0x4840, 0x9C33, 0x568F, + 0xC45E, 0x0EE2, 0xDA91, 0x102D, 0xF9C0, 0x337C, 0xE70F, 0x2DB3, + 0x491A, 0x83A6, 0x57D5, 0x9D69, 0x7484, 0xBE38, 0x6A4B, 0xA0F7, + 0x3226, 0xF89A, 0x2CE9, 0xE655, 0x0FB8, 0xC504, 0x1177, 0xDBCB + }, +#endif +#if CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE >= 5 + { + 0x0000, 0x2D56, 0x5AAC, 0x77FA, 0xB558, 0x980E, 0xEFF4, 0xC2A2, + 0xE107, 0xCC51, 0xBBAB, 0x96FD, 0x545F, 0x7909, 0x0EF3, 0x23A5, + 0x49B9, 0x64EF, 0x1315, 0x3E43, 0xFCE1, 0xD1B7, 0xA64D, 0x8B1B, + 0xA8BE, 0x85E8, 0xF212, 0xDF44, 0x1DE6, 0x30B0, 0x474A, 0x6A1C, + 0x9372, 0xBE24, 0xC9DE, 0xE488, 0x262A, 0x0B7C, 0x7C86, 0x51D0, + 0x7275, 0x5F23, 0x28D9, 0x058F, 0xC72D, 0xEA7B, 0x9D81, 0xB0D7, + 0xDACB, 0xF79D, 0x8067, 0xAD31, 0x6F93, 0x42C5, 0x353F, 0x1869, + 0x3BCC, 0x169A, 0x6160, 0x4C36, 0x8E94, 0xA3C2, 0xD438, 0xF96E, + 0xAD53, 0x8005, 0xF7FF, 0xDAA9, 0x180B, 0x355D, 0x42A7, 0x6FF1, + 0x4C54, 0x6102, 0x16F8, 0x3BAE, 0xF90C, 0xD45A, 0xA3A0, 0x8EF6, + 0xE4EA, 0xC9BC, 0xBE46, 0x9310, 0x51B2, 0x7CE4, 0x0B1E, 0x2648, + 0x05ED, 0x28BB, 0x5F41, 0x7217, 0xB0B5, 0x9DE3, 0xEA19, 0xC74F, + 0x3E21, 0x1377, 0x648D, 0x49DB, 0x8B79, 0xA62F, 0xD1D5, 0xFC83, + 0xDF26, 0xF270, 0x858A, 0xA8DC, 0x6A7E, 0x4728, 0x30D2, 0x1D84, + 0x7798, 0x5ACE, 0x2D34, 0x0062, 0xC2C0, 0xEF96, 0x986C, 0xB53A, + 0x969F, 0xBBC9, 0xCC33, 0xE165, 0x23C7, 0x0E91, 0x796B, 0x543D, + 0xD111, 0xFC47, 0x8BBD, 0xA6EB, 0x6449, 0x491F, 0x3EE5, 0x13B3, + 0x3016, 0x1D40, 0x6ABA, 0x47EC, 0x854E, 0xA818, 0xDFE2, 0xF2B4, + 0x98A8, 0xB5FE, 0xC204, 0xEF52, 0x2DF0, 0x00A6, 0x775C, 0x5A0A, + 0x79AF, 0x54F9, 0x2303, 0x0E55, 0xCCF7, 0xE1A1, 0x965B, 0xBB0D, + 0x4263, 0x6F35, 0x18CF, 0x3599, 0xF73B, 0xDA6D, 0xAD97, 0x80C1, + 0xA364, 0x8E32, 0xF9C8, 0xD49E, 0x163C, 0x3B6A, 0x4C90, 0x61C6, + 0x0BDA, 0x268C, 0x5176, 0x7C20, 0xBE82, 0x93D4, 0xE42E, 0xC978, + 0xEADD, 0xC78B, 0xB071, 0x9D27, 0x5F85, 0x72D3, 0x0529, 0x287F, + 0x7C42, 0x5114, 0x26EE, 0x0BB8, 0xC91A, 0xE44C, 0x93B6, 0xBEE0, + 0x9D45, 0xB013, 0xC7E9, 0xEABF, 0x281D, 0x054B, 0x72B1, 0x5FE7, + 0x35FB, 0x18AD, 0x6F57, 0x4201, 0x80A3, 0xADF5, 0xDA0F, 0xF759, + 0xD4FC, 0xF9AA, 0x8E50, 0xA306, 0x61A4, 0x4CF2, 0x3B08, 0x165E, + 0xEF30, 0xC266, 0xB59C, 0x98CA, 0x5A68, 0x773E, 0x00C4, 0x2D92, + 0x0E37, 0x2361, 0x549B, 0x79CD, 0xBB6F, 0x9639, 0xE1C3, 0xCC95, + 0xA689, 0x8BDF, 0xFC25, 0xD173, 0x13D1, 0x3E87, 0x497D, 0x642B, + 0x478E, 0x6AD8, 0x1D22, 0x3074, 0xF2D6, 0xDF80, 0xA87A, 0x852C + }, + { + 0x0000, 0x2995, 0x532A, 0x7ABF, 0xA654, 0x8FC1, 0xF57E, 0xDCEB, + 0xC71F, 0xEE8A, 0x9435, 0xBDA0, 0x614B, 0x48DE, 0x3261, 0x1BF4, + 0x0589, 0x2C1C, 0x56A3, 0x7F36, 0xA3DD, 0x8A48, 0xF0F7, 0xD962, + 0xC296, 0xEB03, 0x91BC, 0xB829, 0x64C2, 0x4D57, 0x37E8, 0x1E7D, + 0x0B12, 0x2287, 0x5838, 0x71AD, 0xAD46, 0x84D3, 0xFE6C, 0xD7F9, + 0xCC0D, 0xE598, 0x9F27, 0xB6B2, 0x6A59, 0x43CC, 0x3973, 0x10E6, + 0x0E9B, 0x270E, 0x5DB1, 0x7424, 0xA8CF, 0x815A, 0xFBE5, 0xD270, + 0xC984, 0xE011, 0x9AAE, 0xB33B, 0x6FD0, 0x4645, 0x3CFA, 0x156F, + 0x1624, 0x3FB1, 0x450E, 0x6C9B, 0xB070, 0x99E5, 0xE35A, 0xCACF, + 0xD13B, 0xF8AE, 0x8211, 0xAB84, 0x776F, 0x5EFA, 0x2445, 0x0DD0, + 0x13AD, 0x3A38, 0x4087, 0x6912, 0xB5F9, 0x9C6C, 0xE6D3, 0xCF46, + 0xD4B2, 0xFD27, 0x8798, 0xAE0D, 0x72E6, 0x5B73, 0x21CC, 0x0859, + 0x1D36, 0x34A3, 0x4E1C, 0x6789, 0xBB62, 0x92F7, 0xE848, 0xC1DD, + 0xDA29, 0xF3BC, 0x8903, 0xA096, 0x7C7D, 0x55E8, 0x2F57, 0x06C2, + 0x18BF, 0x312A, 0x4B95, 0x6200, 0xBEEB, 0x977E, 0xEDC1, 0xC454, + 0xDFA0, 0xF635, 0x8C8A, 0xA51F, 0x79F4, 0x5061, 0x2ADE, 0x034B, + 0x2C48, 0x05DD, 0x7F62, 0x56F7, 0x8A1C, 0xA389, 0xD936, 0xF0A3, + 0xEB57, 0xC2C2, 0xB87D, 0x91E8, 0x4D03, 0x6496, 0x1E29, 0x37BC, + 0x29C1, 0x0054, 0x7AEB, 0x537E, 0x8F95, 0xA600, 0xDCBF, 0xF52A, + 0xEEDE, 0xC74B, 0xBDF4, 0x9461, 0x488A, 0x611F, 0x1BA0, 0x3235, + 0x275A, 0x0ECF, 0x7470, 0x5DE5, 0x810E, 0xA89B, 0xD224, 0xFBB1, + 0xE045, 0xC9D0, 0xB36F, 0x9AFA, 0x4611, 0x6F84, 0x153B, 0x3CAE, + 0x22D3, 0x0B46, 0x71F9, 0x586C, 0x8487, 0xAD12, 0xD7AD, 0xFE38, + 0xE5CC, 0xCC59, 0xB6E6, 0x9F73, 0x4398, 0x6A0D, 0x10B2, 0x3927, + 0x3A6C, 0x13F9, 0x6946, 0x40D3, 0x9C38, 0xB5AD, 0xCF12, 0xE687, + 0xFD73, 0xD4E6, 0xAE59, 0x87CC, 0x5B27, 0x72B2, 0x080D, 0x2198, + 0x3FE5, 0x1670, 0x6CCF, 0x455A, 0x99B1, 0xB024, 0xCA9B, 0xE30E, + 0xF8FA, 0xD16F, 0xABD0, 0x8245, 0x5EAE, 0x773B, 0x0D84, 0x2411, + 0x317E, 0x18EB, 0x6254, 0x4BC1, 0x972A, 0xBEBF, 0xC400, 0xED95, + 0xF661, 0xDFF4, 0xA54B, 0x8CDE, 0x5035, 0x79A0, 0x031F, 0x2A8A, + 0x34F7, 0x1D62, 0x67DD, 0x4E48, 0x92A3, 0xBB36, 0xC189, 0xE81C, + 0xF3E8, 0xDA7D, 0xA0C2, 0x8957, 0x55BC, 0x7C29, 0x0696, 0x2F03 + }, + { + 0x0000, 0x5890, 0xB120, 0xE9B0, 0xE9F7, 0xB167, 0x58D7, 0x0047, + 0x5859, 0x00C9, 0xE979, 0xB1E9, 0xB1AE, 0xE93E, 0x008E, 0x581E, + 0xB0B2, 0xE822, 0x0192, 0x5902, 0x5945, 0x01D5, 0xE865, 0xB0F5, + 0xE8EB, 0xB07B, 0x59CB, 0x015B, 0x011C, 0x598C, 0xB03C, 0xE8AC, + 0xEAD3, 0xB243, 0x5BF3, 0x0363, 0x0324, 0x5BB4, 0xB204, 0xEA94, + 0xB28A, 0xEA1A, 0x03AA, 0x5B3A, 0x5B7D, 0x03ED, 0xEA5D, 0xB2CD, + 0x5A61, 0x02F1, 0xEB41, 0xB3D1, 0xB396, 0xEB06, 0x02B6, 0x5A26, + 0x0238, 0x5AA8, 0xB318, 0xEB88, 0xEBCF, 0xB35F, 0x5AEF, 0x027F, + 0x5E11, 0x0681, 0xEF31, 0xB7A1, 0xB7E6, 0xEF76, 0x06C6, 0x5E56, + 0x0648, 0x5ED8, 0xB768, 0xEFF8, 0xEFBF, 0xB72F, 0x5E9F, 0x060F, + 0xEEA3, 0xB633, 0x5F83, 0x0713, 0x0754, 0x5FC4, 0xB674, 0xEEE4, + 0xB6FA, 0xEE6A, 0x07DA, 0x5F4A, 0x5F0D, 0x079D, 0xEE2D, 0xB6BD, + 0xB4C2, 0xEC52, 0x05E2, 0x5D72, 0x5D35, 0x05A5, 0xEC15, 0xB485, + 0xEC9B, 0xB40B, 0x5DBB, 0x052B, 0x056C, 0x5DFC, 0xB44C, 0xECDC, + 0x0470, 0x5CE0, 0xB550, 0xEDC0, 0xED87, 0xB517, 0x5CA7, 0x0437, + 0x5C29, 0x04B9, 0xED09, 0xB599, 0xB5DE, 0xED4E, 0x04FE, 0x5C6E, + 0xBC22, 0xE4B2, 0x0D02, 0x5592, 0x55D5, 0x0D45, 0xE4F5, 0xBC65, + 0xE47B, 0xBCEB, 0x555B, 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0x0262, 0x0CA8, 0x8F83, 0x113C, 0x9217, 0x9CDD, 0x1FF6, + 0xA5EE, 0x26C5, 0x280F, 0xAB24, 0x359B, 0xB6B0, 0xB87A, 0x3B51, + 0x0EB3, 0x8D98, 0x8352, 0x0079, 0x9EC6, 0x1DED, 0x1327, 0x900C, + 0x78E3, 0xFBC8, 0xF502, 0x7629, 0xE896, 0x6BBD, 0x6577, 0xE65C, + 0xD3BE, 0x5095, 0x5E5F, 0xDD74, 0x43CB, 0xC0E0, 0xCE2A, 0x4D01, + 0x9443, 0x1768, 0x19A2, 0x9A89, 0x0436, 0x871D, 0x89D7, 0x0AFC, + 0x3F1E, 0xBC35, 0xB2FF, 0x31D4, 0xAF6B, 0x2C40, 0x228A, 0xA1A1, + 0x494E, 0xCA65, 0xC4AF, 0x4784, 0xD93B, 0x5A10, 0x54DA, 0xD7F1, + 0xE213, 0x6138, 0x6FF2, 0xECD9, 0x7266, 0xF14D, 0xFF87, 0x7CAC + }, +#endif }; __u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, size_t len) { - unsigned int i; + const u8 *ptr = (const __u8 *)buffer; + const u8 *ptr_end = ptr + len; + const u16 *flat_tbl = (const u16 *)t10dif_crc_table; +#if CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE > 1 + size_t tablesize = 1 << (CONFIG_CRYPTO_CRCT10DIF_TABLE_SIZE - 1); + const u8 *ptr_last = ptr + (len / tablesize * tablesize); + + /* + * t10dif_crc_table is two dimensional but access as vector via + * flat_tbl for speed. t[k][j] is equivalent to tt[k*num_cols + j]. + * num_cols in this case is 256 allowing tt[k<<8 + j]. Since "k" + * walks from tablesize to zero, scale it by 256. + */ + while (ptr < ptr_last) { + size_t index = tablesize * CRC_TBL_NUM_COLS; + __u16 t; - for (i = 0 ; i < len ; i++) - crc = (crc << 8) ^ t10_dif_crc_table[((crc >> 8) ^ buffer[i]) & 0xff]; + index -= CRC_TBL_NUM_COLS; + t = flat_tbl[index + (*ptr++ ^ (u8)(crc >> 8))]; + index -= CRC_TBL_NUM_COLS; + t ^= flat_tbl[index + (*ptr++ ^ (u8)crc)]; + crc = t; + while (index > 0) { + index -= CRC_TBL_NUM_COLS; + crc ^= flat_tbl[index + *ptr++]; + } + } +#endif + while (ptr < ptr_end) + crc = flat_tbl[*ptr++ ^ (u8)(crc >> 8)] ^ (crc << 8); return crc; }
Hi, Please include your new patch as plain text inside the mail, not as a MIME attachment. Otherwise it is not downloadable from https://patchwork.kernel.org/patch/10563093/ Christophe Le 16/08/2018 à 16:22, Douglas Gilbert a écrit : > Hi, > Rather than present this formerly as an alternate patch, attached is a > clean-up of my patch which uses the variable size table proposed by > Joe Perches <joe@perches.com> and is based on the original patch that > started this thread. > > Doug Gilbert > > On 2018-08-16 10:02 AM, Jeffrey Lien wrote: >> Eric, >> We did not test the slice by 4 or 8 tables. I'm not sure of the >> value of doing that since the slice by 16 will provide the best >> performance gain.  If I'm missing anything here, please let me know. >> >> I'm working on a new version of the patch based on the feedback from >> others and will also change the pointer variables to start with p and >> fix the indenting you mentioned below in the new version of the patch. >> >> Thanks >> >> Jeff Lien >> >> -----Original Message----- >> From: Eric Biggers [mailto:ebiggers@kernel.org] >> Sent: Friday, August 10, 2018 3:16 PM >> To: Jeffrey Lien <Jeff.Lien@wdc.com> >> Cc: linux-kernel@vger.kernel.org; linux-crypto@vger.kernel.org; >> linux-block@vger.kernel.org; linux-scsi@vger.kernel.org; >> herbert@gondor.apana.org.au; tim.c.chen@linux.intel.com; >> martin.petersen@oracle.com; David Darrington >> <david.darrington@wdc.com>; Jeff Furlong <jeff.furlong@wdc.com> >> Subject: Re: [PATCH] Performance Improvement in CRC16 Calculations. >> >> On Fri, Aug 10, 2018 at 02:12:11PM -0500, Jeff Lien wrote: >>> This patch provides a performance improvement for the CRC16 >>> calculations done in read/write workloads using the T10 Type 1/2/3 >>> guard field. For example, today with sequential write workloads (one >>> thread/CPU of IO) we consume 100% of the CPU because of the CRC16 >>> computation bottleneck. Today's block devices are considerably >>> faster, but the CRC16 calculation prevents folks from utilizing the >>> throughput of such devices. To speed up this calculation and expose >>> the block device throughput, we slice the old single byte for loop >>> into a 16 byte for loop, with a larger CRC table to match. The >>> result has shown 5x performance improvements on various big endian >>> and little endian systems running the 4.18.0 kernel version. >>> >>> FIO Sequential Write, 64K Block Size, Queue Depth 64 >>> BE Base Kernel:       bw=201.5 MiB/s >>> BE Modified CRC Calc: bw=968.1 MiB/s >>> 4.80x performance improvement >>> >>> LE Base Kernel:       bw=357 MiB/s >>> LE Modified CRC Calc: bw=1964 MiB/s >>> 5.51x performance improvement >>> >>> FIO Sequential Read, 64K Block Size, Queue Depth 64 >>> BE Base Kernel:       bw=611.2 MiB/s >>> BE Modified CRC calc: bw=684.9 MiB/s >>> 1.12x performance improvement >>> >>> LE Base Kernel:       bw=797 MiB/s >>> LE Modified CRC Calc: bw=2730 MiB/s >>> 3.42x performance improvement >> >> Did you also test the slice-by-4 (requires 2048-byte table) and >> slice-by-8 (requires 4096-byte table) methods? Your proposal is >> slice-by-16 (requires 8192-byte table); the original was slice-by-1 >> (requires 512-byte table). >> >>>  __u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, >>> size_t len) { >>> -   unsigned int i; >>> +   const __u8 *i = (const __u8 *)buffer; >>> +   const __u8 *i_end = i + len; >>> +   const __u8 *i_last16 = i + (len / 16 * 16); >> >> 'i' is normally a loop counter, not a pointer. >> Use 'p', 'p_end', and 'p_last16'. >> >>> -   for (i = 0 ; i < len ; i++) >>> -       crc = (crc << 8) ^ t10_dif_crc_table[((crc >> 8) ^ >>> buffer[i]) & 0xff]; >>> +   for (; i < i_last16; i += 16) { >>> +       crc = t10_dif_crc_table[15][i[0] ^ (__u8)(crc >> 8)] ^ >>> +       t10_dif_crc_table[14][i[1] ^ (__u8)(crc >> 0)] ^ >>> +       t10_dif_crc_table[13][i[2]] ^ >>> +       t10_dif_crc_table[12][i[3]] ^ >>> +       t10_dif_crc_table[11][i[4]] ^ >>> +       t10_dif_crc_table[10][i[5]] ^ >>> +       t10_dif_crc_table[9][i[6]] ^ >>> +       t10_dif_crc_table[8][i[7]] ^ >>> +       t10_dif_crc_table[7][i[8]] ^ >>> +       t10_dif_crc_table[6][i[9]] ^ >>> +       t10_dif_crc_table[5][i[10]] ^ >>> +       t10_dif_crc_table[4][i[11]] ^ >>> +       t10_dif_crc_table[3][i[12]] ^ >>> +       t10_dif_crc_table[2][i[13]] ^ >>> +       t10_dif_crc_table[1][i[14]] ^ >>> +       t10_dif_crc_table[0][i[15]]; >>> +   } >> >> Please indent this properly. >> >>        crc = t10_dif_crc_table[15][i[0] ^ (__u8)(crc >> 8)] ^ >>              t10_dif_crc_table[14][i[1] ^ (__u8)(crc >> 0)] ^ >>              t10_dif_crc_table[13][i[2]] ^ >>              t10_dif_crc_table[12][i[3]] ^ >>              t10_dif_crc_table[11][i[4]] ^ >>              ... >> >> - Eric >> >
Hi, Don't be so sure that slice by 16 provides the best performance. Some time ago, I did the comparison for CRC32 between slice by 4 and slice by 8 (as included in the kernel), and the result is the following on an mpc8xx (powerpc/32) With CONFIG_CRC32_SLICEBY8: [ 1.109204] crc32: CRC_LE_BITS = 64, CRC_BE BITS = 64 [ 1.114401] crc32: self tests passed, processed 225944 bytes in 15118910 nsec [ 1.130655] crc32c: CRC_LE_BITS = 64 [ 1.134235] crc32c: self tests passed, processed 225944 bytes in 4479879 nsec With CONFIG_CRC32_SLICEBY4: [ 1.097129] crc32: CRC_LE_BITS = 32, CRC_BE BITS = 32 [ 1.101878] crc32: self tests passed, processed 225944 bytes in 8616242 nsec [ 1.116298] crc32c: CRC_LE_BITS = 32 [ 1.119607] crc32c: self tests passed, processed 225944 bytes in 3289576 nsec As you can see, slice by 4 is better than slice by 8 on that CPU. So I'm sure it is worth doing the test for CRC16 as well. Christophe Le 16/08/2018 à 16:02, Jeffrey Lien a écrit : > Eric, > We did not test the slice by 4 or 8 tables. I'm not sure of the value of doing that since the slice by 16 will provide the best performance gain. If I'm missing anything here, please let me know. > > I'm working on a new version of the patch based on the feedback from others and will also change the pointer variables to start with p and fix the indenting you mentioned below in the new version of the patch. > > Thanks > > Jeff Lien > > -----Original Message----- > From: Eric Biggers [mailto:ebiggers@kernel.org] > Sent: Friday, August 10, 2018 3:16 PM > To: Jeffrey Lien <Jeff.Lien@wdc.com> > Cc: linux-kernel@vger.kernel.org; linux-crypto@vger.kernel.org; linux-block@vger.kernel.org; linux-scsi@vger.kernel.org; herbert@gondor.apana.org.au; tim.c.chen@linux.intel.com; martin.petersen@oracle.com; David Darrington <david.darrington@wdc.com>; Jeff Furlong <jeff.furlong@wdc.com> > Subject: Re: [PATCH] Performance Improvement in CRC16 Calculations. > > On Fri, Aug 10, 2018 at 02:12:11PM -0500, Jeff Lien wrote: >> This patch provides a performance improvement for the CRC16 >> calculations done in read/write workloads using the T10 Type 1/2/3 >> guard field. For example, today with sequential write workloads (one >> thread/CPU of IO) we consume 100% of the CPU because of the CRC16 >> computation bottleneck. Today's block devices are considerably >> faster, but the CRC16 calculation prevents folks from utilizing the >> throughput of such devices. To speed up this calculation and expose >> the block device throughput, we slice the old single byte for loop into a 16 byte for loop, with a larger CRC table to match. The result has shown 5x performance improvements on various big endian and little endian systems running the 4.18.0 kernel version. >> >> FIO Sequential Write, 64K Block Size, Queue Depth 64 >> BE Base Kernel: bw=201.5 MiB/s >> BE Modified CRC Calc: bw=968.1 MiB/s >> 4.80x performance improvement >> >> LE Base Kernel: bw=357 MiB/s >> LE Modified CRC Calc: bw=1964 MiB/s >> 5.51x performance improvement >> >> FIO Sequential Read, 64K Block Size, Queue Depth 64 >> BE Base Kernel: bw=611.2 MiB/s >> BE Modified CRC calc: bw=684.9 MiB/s >> 1.12x performance improvement >> >> LE Base Kernel: bw=797 MiB/s >> LE Modified CRC Calc: bw=2730 MiB/s >> 3.42x performance improvement > > Did you also test the slice-by-4 (requires 2048-byte table) and slice-by-8 (requires 4096-byte table) methods? Your proposal is slice-by-16 (requires 8192-byte table); the original was slice-by-1 (requires 512-byte table). > >> __u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, >> size_t len) { >> - unsigned int i; >> + const __u8 *i = (const __u8 *)buffer; >> + const __u8 *i_end = i + len; >> + const __u8 *i_last16 = i + (len / 16 * 16); > > 'i' is normally a loop counter, not a pointer. > Use 'p', 'p_end', and 'p_last16'. > >> >> - for (i = 0 ; i < len ; i++) >> - crc = (crc << 8) ^ t10_dif_crc_table[((crc >> 8) ^ buffer[i]) & 0xff]; >> + for (; i < i_last16; i += 16) { >> + crc = t10_dif_crc_table[15][i[0] ^ (__u8)(crc >> 8)] ^ >> + t10_dif_crc_table[14][i[1] ^ (__u8)(crc >> 0)] ^ >> + t10_dif_crc_table[13][i[2]] ^ >> + t10_dif_crc_table[12][i[3]] ^ >> + t10_dif_crc_table[11][i[4]] ^ >> + t10_dif_crc_table[10][i[5]] ^ >> + t10_dif_crc_table[9][i[6]] ^ >> + t10_dif_crc_table[8][i[7]] ^ >> + t10_dif_crc_table[7][i[8]] ^ >> + t10_dif_crc_table[6][i[9]] ^ >> + t10_dif_crc_table[5][i[10]] ^ >> + t10_dif_crc_table[4][i[11]] ^ >> + t10_dif_crc_table[3][i[12]] ^ >> + t10_dif_crc_table[2][i[13]] ^ >> + t10_dif_crc_table[1][i[14]] ^ >> + t10_dif_crc_table[0][i[15]]; >> + } > > Please indent this properly. > > crc = t10_dif_crc_table[15][i[0] ^ (__u8)(crc >> 8)] ^ > t10_dif_crc_table[14][i[1] ^ (__u8)(crc >> 0)] ^ > t10_dif_crc_table[13][i[2]] ^ > t10_dif_crc_table[12][i[3]] ^ > t10_dif_crc_table[11][i[4]] ^ > ... > > - Eric >
On 2018-08-16 11:41 AM, Christophe LEROY wrote: > Hi, > > Please include your new patch as plain text inside the mail, not as a MIME > attachment. Otherwise it is not downloadable from > https://patchwork.kernel.org/patch/10563093/ It should be downloadable from: http://sg.danny.cz/sg/p/0001-T10-CRC16-function-build-time-sized-table.patch With regard to your comment about slice (table ?) size, that is partially addressed by a kernel build time option shown in the above patch. That could be taken a bit further with a sysfs knob (where ?) to reduce the effective table size from that which the kernel is built with. To increase the size of the table would imply fetching some more heap and having an algorithm that could generate the extra part of that table required. Doug Gilbert > Christophe > > Le 16/08/2018 à 16:22, Douglas Gilbert a écrit : >> Hi, >> Rather than present this formerly as an alternate patch, attached is a >> clean-up of my patch which uses the variable size table proposed by >> Joe Perches <joe@perches.com> and is based on the original patch that >> started this thread. >> >> Doug Gilbert >> >> On 2018-08-16 10:02 AM, Jeffrey Lien wrote: >>> Eric, >>> We did not test the slice by 4 or 8 tables. I'm not sure of the value of >>> doing that since the slice by 16 will provide the best performance gain.  If >>> I'm missing anything here, please let me know. >>> >>> I'm working on a new version of the patch based on the feedback from others >>> and will also change the pointer variables to start with p and fix the >>> indenting you mentioned below in the new version of the patch. >>> >>> Thanks >>> >>> Jeff Lien >>> >>> -----Original Message----- >>> From: Eric Biggers [mailto:ebiggers@kernel.org] >>> Sent: Friday, August 10, 2018 3:16 PM >>> To: Jeffrey Lien <Jeff.Lien@wdc.com> >>> Cc: linux-kernel@vger.kernel.org; linux-crypto@vger.kernel.org; >>> linux-block@vger.kernel.org; linux-scsi@vger.kernel.org; >>> herbert@gondor.apana.org.au; tim.c.chen@linux.intel.com; >>> martin.petersen@oracle.com; David Darrington <david.darrington@wdc.com>; Jeff >>> Furlong <jeff.furlong@wdc.com> >>> Subject: Re: [PATCH] Performance Improvement in CRC16 Calculations. >>> >>> On Fri, Aug 10, 2018 at 02:12:11PM -0500, Jeff Lien wrote: >>>> This patch provides a performance improvement for the CRC16 >>>> calculations done in read/write workloads using the T10 Type 1/2/3 >>>> guard field. For example, today with sequential write workloads (one >>>> thread/CPU of IO) we consume 100% of the CPU because of the CRC16 >>>> computation bottleneck. Today's block devices are considerably >>>> faster, but the CRC16 calculation prevents folks from utilizing the >>>> throughput of such devices. To speed up this calculation and expose >>>> the block device throughput, we slice the old single byte for loop into a 16 >>>> byte for loop, with a larger CRC table to match. The result has shown 5x >>>> performance improvements on various big endian and little endian systems >>>> running the 4.18.0 kernel version. >>>> >>>> FIO Sequential Write, 64K Block Size, Queue Depth 64 >>>> BE Base Kernel:       bw=201.5 MiB/s >>>> BE Modified CRC Calc: bw=968.1 MiB/s >>>> 4.80x performance improvement >>>> >>>> LE Base Kernel:       bw=357 MiB/s >>>> LE Modified CRC Calc: bw=1964 MiB/s >>>> 5.51x performance improvement >>>> >>>> FIO Sequential Read, 64K Block Size, Queue Depth 64 >>>> BE Base Kernel:       bw=611.2 MiB/s >>>> BE Modified CRC calc: bw=684.9 MiB/s >>>> 1.12x performance improvement >>>> >>>> LE Base Kernel:       bw=797 MiB/s >>>> LE Modified CRC Calc: bw=2730 MiB/s >>>> 3.42x performance improvement >>> >>> Did you also test the slice-by-4 (requires 2048-byte table) and slice-by-8 >>> (requires 4096-byte table) methods? Your proposal is slice-by-16 (requires >>> 8192-byte table); the original was slice-by-1 (requires 512-byte table). >>> >>>>  __u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, >>>> size_t len) { >>>> -   unsigned int i; >>>> +   const __u8 *i = (const __u8 *)buffer; >>>> +   const __u8 *i_end = i + len; >>>> +   const __u8 *i_last16 = i + (len / 16 * 16); >>> >>> 'i' is normally a loop counter, not a pointer. >>> Use 'p', 'p_end', and 'p_last16'. >>> >>>> -   for (i = 0 ; i < len ; i++) >>>> -       crc = (crc << 8) ^ t10_dif_crc_table[((crc >> 8) ^ buffer[i]) & 0xff]; >>>> +   for (; i < i_last16; i += 16) { >>>> +       crc = t10_dif_crc_table[15][i[0] ^ (__u8)(crc >> 8)] ^ >>>> +       t10_dif_crc_table[14][i[1] ^ (__u8)(crc >> 0)] ^ >>>> +       t10_dif_crc_table[13][i[2]] ^ >>>> +       t10_dif_crc_table[12][i[3]] ^ >>>> +       t10_dif_crc_table[11][i[4]] ^ >>>> +       t10_dif_crc_table[10][i[5]] ^ >>>> +       t10_dif_crc_table[9][i[6]] ^ >>>> +       t10_dif_crc_table[8][i[7]] ^ >>>> +       t10_dif_crc_table[7][i[8]] ^ >>>> +       t10_dif_crc_table[6][i[9]] ^ >>>> +       t10_dif_crc_table[5][i[10]] ^ >>>> +       t10_dif_crc_table[4][i[11]] ^ >>>> +       t10_dif_crc_table[3][i[12]] ^ >>>> +       t10_dif_crc_table[2][i[13]] ^ >>>> +       t10_dif_crc_table[1][i[14]] ^ >>>> +       t10_dif_crc_table[0][i[15]]; >>>> +   } >>> >>> Please indent this properly. >>> >>>        crc = t10_dif_crc_table[15][i[0] ^ (__u8)(crc >> 8)] ^ >>>              t10_dif_crc_table[14][i[1] ^ (__u8)(crc >> 0)] ^ >>>              t10_dif_crc_table[13][i[2]] ^ >>>              t10_dif_crc_table[12][i[3]] ^ >>>              t10_dif_crc_table[11][i[4]] ^ >>>              ... >>> >>> - Eric >>> >> >
> With regard to your comment about slice (table ?) size, that is > partially addressed by a kernel build time option shown in the above > patch. That could be taken a bit further with a sysfs knob (where ?) > to reduce the effective table size from that which the kernel is built > with. To increase the size of the table would imply fetching some more > heap and having an algorithm that could generate the extra part of > that table required. I am not a big fan of punting the decision to whoever compiles the kernel to pick a number between 1 and 11 ("this CRC calculation is one louder"). I would prefer to find a reasonable compromise between bandwidth and cache thrashing side effects instead of overwhelming people with build time choices and runtime tunables. Almost everyone is running either Tim's PCLMULQDQ version or using IP checksum for DIX. The software T10 CRC table implementation is mainly there as a reference. I don't know of any production environments using the table-based T10 CRC. I don't have a problem making the code genuinely useful so it can be leveraged by processors without hardware CRC acceleration capability. But there needs to be some solid data guiding this decision so I'm looking forward to see what WDC has in store. Our results definitely matched Christophe's in that larger slice-by-N are not always a win. And "faster" isn't automatically "better" from an application performance perspective. With the caveat that our measurements were done about 10 years ago and I'm sure we've come a long way with processors and caches since then. So the results should be interesting...
> These days we obviously use the hardware-accelerated CRC calculation > so the software table approach mostly serves as a reference > implementation. I was puzzled as to why WDC's tests did not seem to use the hardware- accelerated CRC calculation whereas tests on my end worked fine. Turns out this is due to an unfortunate side effect of how the crypto subsystem works. When crc-t10dif is initialized, the crypto infrastructure will pick the algorithm with the highest priority currently registered. Both block and SCSI will cause crc-t10dif to be compiled as a built-in so this selection happens very early. If crct10dif-pclmul is compiled as a module it will not be available at the time the T10 CRC library is initialized. And thus the block layer integrity code will be stuck with the sluggish table CRC. The workaround is to build with CONFIG_CRYPTO_CRCT10DIF_PCLMUL=y. However, it seems like a bit of a deficiency in crypto that there is no way to upgrade existing transformations if higher priority algorithms become available. btrfs and a few others work around this issue by not using the generic lib/ CRC functions (which defeats the purpose of having these in the first place). Instead they are registering their own transformation at a later time where any accelerator modules are more likely to be loaded. Anyway. Just a heads up to people that wonder why the table algorithm is being exercised despite their hardware supporting CRC acceleration.
On Tue, Aug 21, 2018 at 09:40:34PM -0400, Martin K. Petersen wrote: > When crc-t10dif is initialized, the crypto infrastructure will pick the > algorithm with the highest priority currently registered. Both block and > SCSI will cause crc-t10dif to be compiled as a built-in so this > selection happens very early. Ouch. This might actually happen in a lot of other users of the crypto functionality as well. > However, it seems like a bit of a deficiency in crypto that there is no > way to upgrade existing transformations if higher priority algorithms > become available. btrfs and a few others work around this issue by not > using the generic lib/ CRC functions (which defeats the purpose of > having these in the first place). Instead they are registering their own > transformation at a later time where any accelerator modules are more > likely to be loaded. If we can't fix this in crypto (which doesn't seem that easy), we should at least clearly document the issue somewhere, and fix this in the t10pi code by initializing crct10dif_tfm in a lazy fashion only once the fist block device starts using it.
I rebuilt my 4.18 kernel with CONFIG_CRYPTO_CRCT10DIF_PCLMUL=y as Martin recommended and got even better performance results vs the CRC Slice by 16 changes. Here's a summary of the results FIO Sequential Write, 64K Block Size, Queue Depth 64 PCLMUL = y Kernel: bw = 2237 MiB/s Slice by 16 CRC Calc: bw = 1964 MiB/s Base Kernel: bw = 357 MiB/s FIO Sequential Read, 64K Block Size, Queue Depth 64 PCLMUL = y Kernel: bw = 3839 MiB/s Slice by 16 CRC Calc: bw = 2730 MiB/s Base Kernel: bw = 797 MiB/s So it seems the CONFIG_CRYPTO_CRCT10DIF_PCLMUL=y provides the best performance. Are there any negative side effect to this config option? If not, does it make sense to recommend all the major distro's change their config options to have CONFIG_CRYPTO_CRCT10DIF_PCLMUL=y as the default option? Jeff Lien -----Original Message----- From: Christoph Hellwig [mailto:hch@infradead.org] Sent: Wednesday, August 22, 2018 1:20 AM To: Martin K. Petersen <martin.petersen@oracle.com> Cc: Jeffrey Lien <Jeff.Lien@wdc.com>; linux-kernel@vger.kernel.org; linux-crypto@vger.kernel.org; linux-block@vger.kernel.org; linux-scsi@vger.kernel.org; herbert@gondor.apana.org.au; tim.c.chen@linux.intel.com; David Darrington <david.darrington@wdc.com>; Jeff Furlong <jeff.furlong@wdc.com> Subject: Re: [PATCH] Performance Improvement in CRC16 Calculations. On Tue, Aug 21, 2018 at 09:40:34PM -0400, Martin K. Petersen wrote: > When crc-t10dif is initialized, the crypto infrastructure will pick > the algorithm with the highest priority currently registered. Both > block and SCSI will cause crc-t10dif to be compiled as a built-in so > this selection happens very early. Ouch. This might actually happen in a lot of other users of the crypto functionality as well. > However, it seems like a bit of a deficiency in crypto that there is > no way to upgrade existing transformations if higher priority > algorithms become available. btrfs and a few others work around this > issue by not using the generic lib/ CRC functions (which defeats the > purpose of having these in the first place). Instead they are > registering their own transformation at a later time where any > accelerator modules are more likely to be loaded. If we can't fix this in crypto (which doesn't seem that easy), we should at least clearly document the issue somewhere, and fix this in the t10pi code by initializing crct10dif_tfm in a lazy fashion only once the fist block device starts using it.
On 24 August 2018 at 16:32, Jeffrey Lien <Jeff.Lien@wdc.com> wrote: > I rebuilt my 4.18 kernel with CONFIG_CRYPTO_CRCT10DIF_PCLMUL=y as Martin recommended and got even better performance results vs the CRC Slice by 16 changes. Here's a summary of the results > > FIO Sequential Write, 64K Block Size, Queue Depth 64 > PCLMUL = y Kernel: bw = 2237 MiB/s > Slice by 16 CRC Calc: bw = 1964 MiB/s > Base Kernel: bw = 357 MiB/s > > FIO Sequential Read, 64K Block Size, Queue Depth 64 > PCLMUL = y Kernel: bw = 3839 MiB/s > Slice by 16 CRC Calc: bw = 2730 MiB/s > Base Kernel: bw = 797 MiB/s > > So it seems the CONFIG_CRYPTO_CRCT10DIF_PCLMUL=y provides the best performance. Are there any negative side effect to this config option? If not, does it make sense to recommend all the major distro's change their config options to have CONFIG_CRYPTO_CRCT10DIF_PCLMUL=y as the default option? > I think the way the library version of crc_t10dif() invokes the crypto API should be revised. Would it be possible to allocate the crypto transform upon first use instead of from an initcall? If crc_t10dif() is mostly called from non-process context, that would not really work, but otherwise, we could simply defer it (and occasional calls from non-process context that do occur would use the generic code until the point where another call from process context allocates the transform) > -----Original Message----- > From: Christoph Hellwig [mailto:hch@infradead.org] > Sent: Wednesday, August 22, 2018 1:20 AM > To: Martin K. Petersen <martin.petersen@oracle.com> > Cc: Jeffrey Lien <Jeff.Lien@wdc.com>; linux-kernel@vger.kernel.org; linux-crypto@vger.kernel.org; linux-block@vger.kernel.org; linux-scsi@vger.kernel.org; herbert@gondor.apana.org.au; tim.c.chen@linux.intel.com; David Darrington <david.darrington@wdc.com>; Jeff Furlong <jeff.furlong@wdc.com> > Subject: Re: [PATCH] Performance Improvement in CRC16 Calculations. > > On Tue, Aug 21, 2018 at 09:40:34PM -0400, Martin K. Petersen wrote: >> When crc-t10dif is initialized, the crypto infrastructure will pick >> the algorithm with the highest priority currently registered. Both >> block and SCSI will cause crc-t10dif to be compiled as a built-in so >> this selection happens very early. > > Ouch. This might actually happen in a lot of other users of the crypto functionality as well. > >> However, it seems like a bit of a deficiency in crypto that there is >> no way to upgrade existing transformations if higher priority >> algorithms become available. btrfs and a few others work around this >> issue by not using the generic lib/ CRC functions (which defeats the >> purpose of having these in the first place). Instead they are >> registering their own transformation at a later time where any >> accelerator modules are more likely to be loaded. > > If we can't fix this in crypto (which doesn't seem that easy), we should at least clearly document the issue somewhere, and fix this in the t10pi code by initializing crct10dif_tfm in a lazy fashion only once the fist block device starts using it.
Ard, > Would it be possible to allocate the crypto transform upon first use > instead of from an initcall? If crc_t10dif() is mostly called from > non-process context, that would not really work, but otherwise, we > could simply defer it (and occasional calls from non-process context > that do occur would use the generic code until the point where another > call from process context allocates the transform) The function is always called from user context. However, postponing the crypto transform registration doesn't solve the common scenario of the user booting off of a Fibre Channel/SAS/NVMe device with the desired crct10dif-pclmul.ko module located on the boot drive. If there is no good way to teach crypto to update existing registrations when a higher priority transformation becomes available, then we probably need to explore tweaking dracut to unconditionally load crct10dif-pclmul (and your ARM equivalent). Looks like there are already hacks in place in dracut to preload crc32c for btrfs and XFS. Anyway. Just seems like the kernel is violating the principle of least surprise here. The kernel should always pick the best available tool for the job...
Jeffrey, > So it seems the CONFIG_CRYPTO_CRCT10DIF_PCLMUL=y provides the best > performance. Thanks for confirming! > Are there any negative side effect to this config option? Other than kernel image size, not really.
On 24 August 2018 at 17:29, Martin K. Petersen <martin.petersen@oracle.com> wrote: > > Ard, > >> Would it be possible to allocate the crypto transform upon first use >> instead of from an initcall? If crc_t10dif() is mostly called from >> non-process context, that would not really work, but otherwise, we >> could simply defer it (and occasional calls from non-process context >> that do occur would use the generic code until the point where another >> call from process context allocates the transform) > > The function is always called from user context. However, postponing the > crypto transform registration doesn't solve the common scenario of the > user booting off of a Fibre Channel/SAS/NVMe device with the desired > crct10dif-pclmul.ko module located on the boot drive. > > If there is no good way to teach crypto to update existing registrations > when a higher priority transformation becomes available, then we > probably need to explore tweaking dracut to unconditionally load > crct10dif-pclmul (and your ARM equivalent). Looks like there are already > hacks in place in dracut to preload crc32c for btrfs and XFS. > I'd prefer to handle this without help from userland. It shouldn't be too difficult to register a module notifier that only sets a flag (or the static key, even?), and to free and re-allocate the crc_t10dif transform if the flag is set. > Anyway. Just seems like the kernel is violating the principle of least > surprise here. The kernel should always pick the best available tool for > the job... > > -- > Martin K. Petersen Oracle Linux Engineering
Ard, > I'd prefer to handle this without help from userland. > > It shouldn't be too difficult to register a module notifier that only > sets a flag (or the static key, even?), and to free and re-allocate > the crc_t10dif transform if the flag is set. Something like this proof of concept? diff --git a/lib/crc-t10dif.c b/lib/crc-t10dif.c index 1ad33e555805..87d0e8f0794a 100644 --- a/lib/crc-t10dif.c +++ b/lib/crc-t10dif.c @@ -15,10 +15,50 @@ #include <linux/init.h> #include <crypto/hash.h> #include <linux/static_key.h> +#include <linux/notifier.h> static struct crypto_shash *crct10dif_tfm; static struct static_key crct10dif_fallback __read_mostly; +static void crc_t10dif_print(void) +{ + if (static_key_false(&crct10dif_fallback)) + pr_info("CRC T10 DIF calculated using library function\n"); + else + pr_info("CRC T10 DIF calculated using crypto hash %s\n", + crypto_tfm_alg_driver_name(crypto_shash_tfm(crct10dif_tfm))); +} + +static int crc_t10dif_rehash(struct notifier_block *self, unsigned long val, void *data) +{ +#ifdef CONFIG_MODULES + struct module *mod = data; + + if (val != MODULE_STATE_LIVE || + strncmp(mod->name, "crct10dif", strlen("crct10dif"))) + return 0; + + /* Fall back to library function while we replace the tfm */ + static_key_slow_inc(&crct10dif_fallback); + + crypto_free_shash(crct10dif_tfm); + crct10dif_tfm = crypto_alloc_shash("crct10dif", 0, 0); + if (IS_ERR(crct10dif_tfm)) { + crct10dif_tfm = NULL; + goto out; + } + + static_key_slow_dec(&crct10dif_fallback); +out: + crc_t10dif_print(); + return 0; +#endif /* CONFIG_MODULES */ +} + +static struct notifier_block crc_t10dif_nb = { + .notifier_call = crc_t10dif_rehash, +}; + __u16 crc_t10dif_update(__u16 crc, const unsigned char *buffer, size_t len) { struct { @@ -49,16 +90,21 @@ EXPORT_SYMBOL(crc_t10dif); static int __init crc_t10dif_mod_init(void) { + register_module_notifier(&crc_t10dif_nb); + crct10dif_tfm = crypto_alloc_shash("crct10dif", 0, 0); if (IS_ERR(crct10dif_tfm)) { static_key_slow_inc(&crct10dif_fallback); crct10dif_tfm = NULL; } + + crc_t10dif_print(); return 0; } static void __exit crc_t10dif_mod_fini(void) { + unregister_module_notifier(&crc_t10dif_nb); crypto_free_shash(crct10dif_tfm); }
On 24 August 2018 at 22:46, Martin K. Petersen <martin.petersen@oracle.com> wrote: > > Ard, > >> I'd prefer to handle this without help from userland. >> >> It shouldn't be too difficult to register a module notifier that only >> sets a flag (or the static key, even?), and to free and re-allocate >> the crc_t10dif transform if the flag is set. > > Something like this proof of concept? > > diff --git a/lib/crc-t10dif.c b/lib/crc-t10dif.c > index 1ad33e555805..87d0e8f0794a 100644 > --- a/lib/crc-t10dif.c > +++ b/lib/crc-t10dif.c > @@ -15,10 +15,50 @@ > #include <linux/init.h> > #include <crypto/hash.h> > #include <linux/static_key.h> > +#include <linux/notifier.h> > > static struct crypto_shash *crct10dif_tfm; > static struct static_key crct10dif_fallback __read_mostly; > > +static void crc_t10dif_print(void) > +{ > + if (static_key_false(&crct10dif_fallback)) > + pr_info("CRC T10 DIF calculated using library function\n"); > + else > + pr_info("CRC T10 DIF calculated using crypto hash %s\n", > + crypto_tfm_alg_driver_name(crypto_shash_tfm(crct10dif_tfm))); > +} > + > +static int crc_t10dif_rehash(struct notifier_block *self, unsigned long val, void *data) > +{ > +#ifdef CONFIG_MODULES > + struct module *mod = data; > + > + if (val != MODULE_STATE_LIVE || > + strncmp(mod->name, "crct10dif", strlen("crct10dif"))) > + return 0; > + > + /* Fall back to library function while we replace the tfm */ > + static_key_slow_inc(&crct10dif_fallback); > + > + crypto_free_shash(crct10dif_tfm); > + crct10dif_tfm = crypto_alloc_shash("crct10dif", 0, 0); > + if (IS_ERR(crct10dif_tfm)) { > + crct10dif_tfm = NULL; > + goto out; > + } > + > + static_key_slow_dec(&crct10dif_fallback); > +out: > + crc_t10dif_print(); > + return 0; > +#endif /* CONFIG_MODULES */ > +} > + > +static struct notifier_block crc_t10dif_nb = { > + .notifier_call = crc_t10dif_rehash, > +}; > + > __u16 crc_t10dif_update(__u16 crc, const unsigned char *buffer, size_t len) > { > struct { > @@ -49,16 +90,21 @@ EXPORT_SYMBOL(crc_t10dif); > > static int __init crc_t10dif_mod_init(void) > { > + register_module_notifier(&crc_t10dif_nb); > + > crct10dif_tfm = crypto_alloc_shash("crct10dif", 0, 0); > if (IS_ERR(crct10dif_tfm)) { > static_key_slow_inc(&crct10dif_fallback); > crct10dif_tfm = NULL; > } > + > + crc_t10dif_print(); > return 0; > } > > static void __exit crc_t10dif_mod_fini(void) > { > + unregister_module_notifier(&crc_t10dif_nb); > crypto_free_shash(crct10dif_tfm); > } > This looks like it should work, yes. It does rely on the module name to start with 'crct10dif' but I guess that is reasonable, and matches the current state on all architectures. Anyone care to boot test this? Jeffrey?
Ard, > This looks like it should work, yes. It does rely on the module name > to start with 'crct10dif' but I guess that is reasonable, and matches > the current state on all architectures. Yep, I verified the module names on ARM and Power. There really wasn't much I could key off of other than the name string. > Anyone care to boot test this? Jeffrey? Did some quick tests on my end with both scsi_debug and FC hardware. I verified that performance went up as I loaded crct10dif-pclmul while the test was running: [ 23.488059] CRC T10 DIF calculated using crypto hash crct10dif-generic [ 156.922455] sd 0:0:0:0: [sda] Enabling DIX T10-DIF-TYPE1-CRC protection [ 221.577731] CRC T10 DIF calculated using crypto hash crct10dif-pclmul R 63.60 MB/s, W 61.00 MB/s, IOPS 486 | Ops 4460, Rec 0, Err 0 R 61.80 MB/s, W 62.00 MB/s, IOPS 493 | Ops 6926, Rec 0, Err 0 R 62.60 MB/s, W 60.80 MB/s, IOPS 494 | Ops 9396, Rec 0, Err 0 R 59.40 MB/s, W 58.80 MB/s, IOPS 482 | Ops 11804, Rec 0, Err 0 R 151.40 MB/s, W 155.40 MB/s, IOPS 1216 | Ops 17883, Rec 0, Err 0 R 165.00 MB/s, W 166.40 MB/s, IOPS 1327 | Ops 24520, Rec 0, Err 0 R 175.00 MB/s, W 177.40 MB/s, IOPS 1417 | Ops 31604, Rec 0, Err 0 R 185.80 MB/s, W 188.60 MB/s, IOPS 1507 | Ops 39137, Rec 0, Err 0 R 200.60 MB/s, W 203.00 MB/s, IOPS 1629 | Ops 47284, Rec 0, Err 0 Note that in this case the CRC is calculated twice per I/O (block layer and scsi_debug). I'll do some more testing over the weekend...
On Fri, Aug 24, 2018 at 05:46:15PM -0400, Martin K. Petersen wrote: > > +#ifdef CONFIG_MODULES > + struct module *mod = data; > + > + if (val != MODULE_STATE_LIVE || > + strncmp(mod->name, "crct10dif", strlen("crct10dif"))) > + return 0; > + > + /* Fall back to library function while we replace the tfm */ > + static_key_slow_inc(&crct10dif_fallback); > + > + crypto_free_shash(crct10dif_tfm); > + crct10dif_tfm = crypto_alloc_shash("crct10dif", 0, 0); > + if (IS_ERR(crct10dif_tfm)) { > + crct10dif_tfm = NULL; > + goto out; > + } > + > + static_key_slow_dec(&crct10dif_fallback); I don't think this is safe unless you do some kind of locking which would slow down the data path. The easiest fix would be to keep the old tfm around forever, or use RCU if RCU read locking is acceptable to your use-case. We already have a notifier mechanism in the crypto API for algorithm registration events. However, it currently only notifies for untested algorithms. So we need to add an event for tested algorithms and also export this for use outside of the crypto API. Cheers,
Herbert, > I don't think this is safe unless you do some kind of locking > which would slow down the data path. The easiest fix would be > to keep the old tfm around forever, or use RCU if RCU read locking > is acceptable to your use-case. You're right. There's a small race there. Patch series coming...
diff --git a/crypto/crct10dif_common.c b/crypto/crct10dif_common.c index b2fab36..40e1d6c 100644 --- a/crypto/crct10dif_common.c +++ b/crypto/crct10dif_common.c @@ -32,47 +32,580 @@ * x^16 + x^15 + x^11 + x^9 + x^8 + x^7 + x^5 + x^4 + x^2 + x + 1 * gt: 0x8bb7 */ -static const __u16 t10_dif_crc_table[256] = { - 0x0000, 0x8BB7, 0x9CD9, 0x176E, 0xB205, 0x39B2, 0x2EDC, 0xA56B, - 0xEFBD, 0x640A, 0x7364, 0xF8D3, 0x5DB8, 0xD60F, 0xC161, 0x4AD6, - 0x54CD, 0xDF7A, 0xC814, 0x43A3, 0xE6C8, 0x6D7F, 0x7A11, 0xF1A6, - 0xBB70, 0x30C7, 0x27A9, 0xAC1E, 0x0975, 0x82C2, 0x95AC, 0x1E1B, - 0xA99A, 0x222D, 0x3543, 0xBEF4, 0x1B9F, 0x9028, 0x8746, 0x0CF1, - 0x4627, 0xCD90, 0xDAFE, 0x5149, 0xF422, 0x7F95, 0x68FB, 0xE34C, - 0xFD57, 0x76E0, 0x618E, 0xEA39, 0x4F52, 0xC4E5, 0xD38B, 0x583C, - 0x12EA, 0x995D, 0x8E33, 0x0584, 0xA0EF, 0x2B58, 0x3C36, 0xB781, - 0xD883, 0x5334, 0x445A, 0xCFED, 0x6A86, 0xE131, 0xF65F, 0x7DE8, - 0x373E, 0xBC89, 0xABE7, 0x2050, 0x853B, 0x0E8C, 0x19E2, 0x9255, - 0x8C4E, 0x07F9, 0x1097, 0x9B20, 0x3E4B, 0xB5FC, 0xA292, 0x2925, - 0x63F3, 0xE844, 0xFF2A, 0x749D, 0xD1F6, 0x5A41, 0x4D2F, 0xC698, - 0x7119, 0xFAAE, 0xEDC0, 0x6677, 0xC31C, 0x48AB, 0x5FC5, 0xD472, - 0x9EA4, 0x1513, 0x027D, 0x89CA, 0x2CA1, 0xA716, 0xB078, 0x3BCF, - 0x25D4, 0xAE63, 0xB90D, 0x32BA, 0x97D1, 0x1C66, 0x0B08, 0x80BF, - 0xCA69, 0x41DE, 0x56B0, 0xDD07, 0x786C, 0xF3DB, 0xE4B5, 0x6F02, - 0x3AB1, 0xB106, 0xA668, 0x2DDF, 0x88B4, 0x0303, 0x146D, 0x9FDA, - 0xD50C, 0x5EBB, 0x49D5, 0xC262, 0x6709, 0xECBE, 0xFBD0, 0x7067, - 0x6E7C, 0xE5CB, 0xF2A5, 0x7912, 0xDC79, 0x57CE, 0x40A0, 0xCB17, - 0x81C1, 0x0A76, 0x1D18, 0x96AF, 0x33C4, 0xB873, 0xAF1D, 0x24AA, - 0x932B, 0x189C, 0x0FF2, 0x8445, 0x212E, 0xAA99, 0xBDF7, 0x3640, - 0x7C96, 0xF721, 0xE04F, 0x6BF8, 0xCE93, 0x4524, 0x524A, 0xD9FD, - 0xC7E6, 0x4C51, 0x5B3F, 0xD088, 0x75E3, 0xFE54, 0xE93A, 0x628D, - 0x285B, 0xA3EC, 0xB482, 0x3F35, 0x9A5E, 0x11E9, 0x0687, 0x8D30, - 0xE232, 0x6985, 0x7EEB, 0xF55C, 0x5037, 0xDB80, 0xCCEE, 0x4759, - 0x0D8F, 0x8638, 0x9156, 0x1AE1, 0xBF8A, 0x343D, 0x2353, 0xA8E4, - 0xB6FF, 0x3D48, 0x2A26, 0xA191, 0x04FA, 0x8F4D, 0x9823, 0x1394, - 0x5942, 0xD2F5, 0xC59B, 0x4E2C, 0xEB47, 0x60F0, 0x779E, 0xFC29, - 0x4BA8, 0xC01F, 0xD771, 0x5CC6, 0xF9AD, 0x721A, 0x6574, 0xEEC3, - 0xA415, 0x2FA2, 0x38CC, 0xB37B, 0x1610, 0x9DA7, 0x8AC9, 0x017E, - 0x1F65, 0x94D2, 0x83BC, 0x080B, 0xAD60, 0x26D7, 0x31B9, 0xBA0E, - 0xF0D8, 0x7B6F, 0x6C01, 0xE7B6, 0x42DD, 0xC96A, 0xDE04, 0x55B3 +static const __u16 t10_dif_crc_table[16][256] = { + { + 0x0000u, 0x8BB7u, 0x9CD9u, 0x176Eu, 0xB205u, 0x39B2u, 0x2EDCu, 0xA56Bu, + 0xEFBDu, 0x640Au, 0x7364u, 0xF8D3u, 0x5DB8u, 0xD60Fu, 0xC161u, 0x4AD6u, + 0x54CDu, 0xDF7Au, 0xC814u, 0x43A3u, 0xE6C8u, 0x6D7Fu, 0x7A11u, 0xF1A6u, + 0xBB70u, 0x30C7u, 0x27A9u, 0xAC1Eu, 0x0975u, 0x82C2u, 0x95ACu, 0x1E1Bu, + 0xA99Au, 0x222Du, 0x3543u, 0xBEF4u, 0x1B9Fu, 0x9028u, 0x8746u, 0x0CF1u, + 0x4627u, 0xCD90u, 0xDAFEu, 0x5149u, 0xF422u, 0x7F95u, 0x68FBu, 0xE34Cu, + 0xFD57u, 0x76E0u, 0x618Eu, 0xEA39u, 0x4F52u, 0xC4E5u, 0xD38Bu, 0x583Cu, + 0x12EAu, 0x995Du, 0x8E33u, 0x0584u, 0xA0EFu, 0x2B58u, 0x3C36u, 0xB781u, + 0xD883u, 0x5334u, 0x445Au, 0xCFEDu, 0x6A86u, 0xE131u, 0xF65Fu, 0x7DE8u, + 0x373Eu, 0xBC89u, 0xABE7u, 0x2050u, 0x853Bu, 0x0E8Cu, 0x19E2u, 0x9255u, + 0x8C4Eu, 0x07F9u, 0x1097u, 0x9B20u, 0x3E4Bu, 0xB5FCu, 0xA292u, 0x2925u, + 0x63F3u, 0xE844u, 0xFF2Au, 0x749Du, 0xD1F6u, 0x5A41u, 0x4D2Fu, 0xC698u, + 0x7119u, 0xFAAEu, 0xEDC0u, 0x6677u, 0xC31Cu, 0x48ABu, 0x5FC5u, 0xD472u, + 0x9EA4u, 0x1513u, 0x027Du, 0x89CAu, 0x2CA1u, 0xA716u, 0xB078u, 0x3BCFu, + 0x25D4u, 0xAE63u, 0xB90Du, 0x32BAu, 0x97D1u, 0x1C66u, 0x0B08u, 0x80BFu, + 0xCA69u, 0x41DEu, 0x56B0u, 0xDD07u, 0x786Cu, 0xF3DBu, 0xE4B5u, 0x6F02u, + 0x3AB1u, 0xB106u, 0xA668u, 0x2DDFu, 0x88B4u, 0x0303u, 0x146Du, 0x9FDAu, + 0xD50Cu, 0x5EBBu, 0x49D5u, 0xC262u, 0x6709u, 0xECBEu, 0xFBD0u, 0x7067u, + 0x6E7Cu, 0xE5CBu, 0xF2A5u, 0x7912u, 0xDC79u, 0x57CEu, 0x40A0u, 0xCB17u, + 0x81C1u, 0x0A76u, 0x1D18u, 0x96AFu, 0x33C4u, 0xB873u, 0xAF1Du, 0x24AAu, + 0x932Bu, 0x189Cu, 0x0FF2u, 0x8445u, 0x212Eu, 0xAA99u, 0xBDF7u, 0x3640u, + 0x7C96u, 0xF721u, 0xE04Fu, 0x6BF8u, 0xCE93u, 0x4524u, 0x524Au, 0xD9FDu, + 0xC7E6u, 0x4C51u, 0x5B3Fu, 0xD088u, 0x75E3u, 0xFE54u, 0xE93Au, 0x628Du, + 0x285Bu, 0xA3ECu, 0xB482u, 0x3F35u, 0x9A5Eu, 0x11E9u, 0x0687u, 0x8D30u, + 0xE232u, 0x6985u, 0x7EEBu, 0xF55Cu, 0x5037u, 0xDB80u, 0xCCEEu, 0x4759u, + 0x0D8Fu, 0x8638u, 0x9156u, 0x1AE1u, 0xBF8Au, 0x343Du, 0x2353u, 0xA8E4u, + 0xB6FFu, 0x3D48u, 0x2A26u, 0xA191u, 0x04FAu, 0x8F4Du, 0x9823u, 0x1394u, + 0x5942u, 0xD2F5u, 0xC59Bu, 0x4E2Cu, 0xEB47u, 0x60F0u, 0x779Eu, 0xFC29u, + 0x4BA8u, 0xC01Fu, 0xD771u, 0x5CC6u, 0xF9ADu, 0x721Au, 0x6574u, 0xEEC3u, + 0xA415u, 0x2FA2u, 0x38CCu, 0xB37Bu, 0x1610u, 0x9DA7u, 0x8AC9u, 0x017Eu, + 0x1F65u, 0x94D2u, 0x83BCu, 0x080Bu, 0xAD60u, 0x26D7u, 0x31B9u, 0xBA0Eu, + 0xF0D8u, 0x7B6Fu, 0x6C01u, 0xE7B6u, 0x42DDu, 0xC96Au, 0xDE04u, 0x55B3u + }, + { + 0x0000u, 0x7562u, 0xEAC4u, 0x9FA6u, 0x5E3Fu, 0x2B5Du, 0xB4FBu, 0xC199u, + 0xBC7Eu, 0xC91Cu, 0x56BAu, 0x23D8u, 0xE241u, 0x9723u, 0x0885u, 0x7DE7u, + 0xF34Bu, 0x8629u, 0x198Fu, 0x6CEDu, 0xAD74u, 0xD816u, 0x47B0u, 0x32D2u, + 0x4F35u, 0x3A57u, 0xA5F1u, 0xD093u, 0x110Au, 0x6468u, 0xFBCEu, 0x8EACu, + 0x6D21u, 0x1843u, 0x87E5u, 0xF287u, 0x331Eu, 0x467Cu, 0xD9DAu, 0xACB8u, + 0xD15Fu, 0xA43Du, 0x3B9Bu, 0x4EF9u, 0x8F60u, 0xFA02u, 0x65A4u, 0x10C6u, + 0x9E6Au, 0xEB08u, 0x74AEu, 0x01CCu, 0xC055u, 0xB537u, 0x2A91u, 0x5FF3u, + 0x2214u, 0x5776u, 0xC8D0u, 0xBDB2u, 0x7C2Bu, 0x0949u, 0x96EFu, 0xE38Du, + 0xDA42u, 0xAF20u, 0x3086u, 0x45E4u, 0x847Du, 0xF11Fu, 0x6EB9u, 0x1BDBu, + 0x663Cu, 0x135Eu, 0x8CF8u, 0xF99Au, 0x3803u, 0x4D61u, 0xD2C7u, 0xA7A5u, + 0x2909u, 0x5C6Bu, 0xC3CDu, 0xB6AFu, 0x7736u, 0x0254u, 0x9DF2u, 0xE890u, + 0x9577u, 0xE015u, 0x7FB3u, 0x0AD1u, 0xCB48u, 0xBE2Au, 0x218Cu, 0x54EEu, + 0xB763u, 0xC201u, 0x5DA7u, 0x28C5u, 0xE95Cu, 0x9C3Eu, 0x0398u, 0x76FAu, + 0x0B1Du, 0x7E7Fu, 0xE1D9u, 0x94BBu, 0x5522u, 0x2040u, 0xBFE6u, 0xCA84u, + 0x4428u, 0x314Au, 0xAEECu, 0xDB8Eu, 0x1A17u, 0x6F75u, 0xF0D3u, 0x85B1u, + 0xF856u, 0x8D34u, 0x1292u, 0x67F0u, 0xA669u, 0xD30Bu, 0x4CADu, 0x39CFu, + 0x3F33u, 0x4A51u, 0xD5F7u, 0xA095u, 0x610Cu, 0x146Eu, 0x8BC8u, 0xFEAAu, + 0x834Du, 0xF62Fu, 0x6989u, 0x1CEBu, 0xDD72u, 0xA810u, 0x37B6u, 0x42D4u, + 0xCC78u, 0xB91Au, 0x26BCu, 0x53DEu, 0x9247u, 0xE725u, 0x7883u, 0x0DE1u, + 0x7006u, 0x0564u, 0x9AC2u, 0xEFA0u, 0x2E39u, 0x5B5Bu, 0xC4FDu, 0xB19Fu, + 0x5212u, 0x2770u, 0xB8D6u, 0xCDB4u, 0x0C2Du, 0x794Fu, 0xE6E9u, 0x938Bu, + 0xEE6Cu, 0x9B0Eu, 0x04A8u, 0x71CAu, 0xB053u, 0xC531u, 0x5A97u, 0x2FF5u, + 0xA159u, 0xD43Bu, 0x4B9Du, 0x3EFFu, 0xFF66u, 0x8A04u, 0x15A2u, 0x60C0u, + 0x1D27u, 0x6845u, 0xF7E3u, 0x8281u, 0x4318u, 0x367Au, 0xA9DCu, 0xDCBEu, + 0xE571u, 0x9013u, 0x0FB5u, 0x7AD7u, 0xBB4Eu, 0xCE2Cu, 0x518Au, 0x24E8u, + 0x590Fu, 0x2C6Du, 0xB3CBu, 0xC6A9u, 0x0730u, 0x7252u, 0xEDF4u, 0x9896u, + 0x163Au, 0x6358u, 0xFCFEu, 0x899Cu, 0x4805u, 0x3D67u, 0xA2C1u, 0xD7A3u, + 0xAA44u, 0xDF26u, 0x4080u, 0x35E2u, 0xF47Bu, 0x8119u, 0x1EBFu, 0x6BDDu, + 0x8850u, 0xFD32u, 0x6294u, 0x17F6u, 0xD66Fu, 0xA30Du, 0x3CABu, 0x49C9u, + 0x342Eu, 0x414Cu, 0xDEEAu, 0xAB88u, 0x6A11u, 0x1F73u, 0x80D5u, 0xF5B7u, + 0x7B1Bu, 0x0E79u, 0x91DFu, 0xE4BDu, 0x2524u, 0x5046u, 0xCFE0u, 0xBA82u, + 0xC765u, 0xB207u, 0x2DA1u, 0x58C3u, 0x995Au, 0xEC38u, 0x739Eu, 0x06FCu + }, + { + 0x0000u, 0x7E66u, 0xFCCCu, 0x82AAu, 0x722Fu, 0x0C49u, 0x8EE3u, 0xF085u, + 0xE45Eu, 0x9A38u, 0x1892u, 0x66F4u, 0x9671u, 0xE817u, 0x6ABDu, 0x14DBu, + 0x430Bu, 0x3D6Du, 0xBFC7u, 0xC1A1u, 0x3124u, 0x4F42u, 0xCDE8u, 0xB38Eu, + 0xA755u, 0xD933u, 0x5B99u, 0x25FFu, 0xD57Au, 0xAB1Cu, 0x29B6u, 0x57D0u, + 0x8616u, 0xF870u, 0x7ADAu, 0x04BCu, 0xF439u, 0x8A5Fu, 0x08F5u, 0x7693u, + 0x6248u, 0x1C2Eu, 0x9E84u, 0xE0E2u, 0x1067u, 0x6E01u, 0xECABu, 0x92CDu, + 0xC51Du, 0xBB7Bu, 0x39D1u, 0x47B7u, 0xB732u, 0xC954u, 0x4BFEu, 0x3598u, + 0x2143u, 0x5F25u, 0xDD8Fu, 0xA3E9u, 0x536Cu, 0x2D0Au, 0xAFA0u, 0xD1C6u, + 0x879Bu, 0xF9FDu, 0x7B57u, 0x0531u, 0xF5B4u, 0x8BD2u, 0x0978u, 0x771Eu, + 0x63C5u, 0x1DA3u, 0x9F09u, 0xE16Fu, 0x11EAu, 0x6F8Cu, 0xED26u, 0x9340u, + 0xC490u, 0xBAF6u, 0x385Cu, 0x463Au, 0xB6BFu, 0xC8D9u, 0x4A73u, 0x3415u, + 0x20CEu, 0x5EA8u, 0xDC02u, 0xA264u, 0x52E1u, 0x2C87u, 0xAE2Du, 0xD04Bu, + 0x018Du, 0x7FEBu, 0xFD41u, 0x8327u, 0x73A2u, 0x0DC4u, 0x8F6Eu, 0xF108u, + 0xE5D3u, 0x9BB5u, 0x191Fu, 0x6779u, 0x97FCu, 0xE99Au, 0x6B30u, 0x1556u, + 0x4286u, 0x3CE0u, 0xBE4Au, 0xC02Cu, 0x30A9u, 0x4ECFu, 0xCC65u, 0xB203u, + 0xA6D8u, 0xD8BEu, 0x5A14u, 0x2472u, 0xD4F7u, 0xAA91u, 0x283Bu, 0x565Du, + 0x8481u, 0xFAE7u, 0x784Du, 0x062Bu, 0xF6AEu, 0x88C8u, 0x0A62u, 0x7404u, + 0x60DFu, 0x1EB9u, 0x9C13u, 0xE275u, 0x12F0u, 0x6C96u, 0xEE3Cu, 0x905Au, + 0xC78Au, 0xB9ECu, 0x3B46u, 0x4520u, 0xB5A5u, 0xCBC3u, 0x4969u, 0x370Fu, + 0x23D4u, 0x5DB2u, 0xDF18u, 0xA17Eu, 0x51FBu, 0x2F9Du, 0xAD37u, 0xD351u, + 0x0297u, 0x7CF1u, 0xFE5Bu, 0x803Du, 0x70B8u, 0x0EDEu, 0x8C74u, 0xF212u, + 0xE6C9u, 0x98AFu, 0x1A05u, 0x6463u, 0x94E6u, 0xEA80u, 0x682Au, 0x164Cu, + 0x419Cu, 0x3FFAu, 0xBD50u, 0xC336u, 0x33B3u, 0x4DD5u, 0xCF7Fu, 0xB119u, + 0xA5C2u, 0xDBA4u, 0x590Eu, 0x2768u, 0xD7EDu, 0xA98Bu, 0x2B21u, 0x5547u, + 0x031Au, 0x7D7Cu, 0xFFD6u, 0x81B0u, 0x7135u, 0x0F53u, 0x8DF9u, 0xF39Fu, + 0xE744u, 0x9922u, 0x1B88u, 0x65EEu, 0x956Bu, 0xEB0Du, 0x69A7u, 0x17C1u, + 0x4011u, 0x3E77u, 0xBCDDu, 0xC2BBu, 0x323Eu, 0x4C58u, 0xCEF2u, 0xB094u, + 0xA44Fu, 0xDA29u, 0x5883u, 0x26E5u, 0xD660u, 0xA806u, 0x2AACu, 0x54CAu, + 0x850Cu, 0xFB6Au, 0x79C0u, 0x07A6u, 0xF723u, 0x8945u, 0x0BEFu, 0x7589u, + 0x6152u, 0x1F34u, 0x9D9Eu, 0xE3F8u, 0x137Du, 0x6D1Bu, 0xEFB1u, 0x91D7u, + 0xC607u, 0xB861u, 0x3ACBu, 0x44ADu, 0xB428u, 0xCA4Eu, 0x48E4u, 0x3682u, + 0x2259u, 0x5C3Fu, 0xDE95u, 0xA0F3u, 0x5076u, 0x2E10u, 0xACBAu, 0xD2DCu + }, + { + 0x0000u, 0x82B5u, 0x8EDDu, 0x0C68u, 0x960Du, 0x14B8u, 0x18D0u, 0x9A65u, + 0xA7ADu, 0x2518u, 0x2970u, 0xABC5u, 0x31A0u, 0xB315u, 0xBF7Du, 0x3DC8u, + 0xC4EDu, 0x4658u, 0x4A30u, 0xC885u, 0x52E0u, 0xD055u, 0xDC3Du, 0x5E88u, + 0x6340u, 0xE1F5u, 0xED9Du, 0x6F28u, 0xF54Du, 0x77F8u, 0x7B90u, 0xF925u, + 0x026Du, 0x80D8u, 0x8CB0u, 0x0E05u, 0x9460u, 0x16D5u, 0x1ABDu, 0x9808u, + 0xA5C0u, 0x2775u, 0x2B1Du, 0xA9A8u, 0x33CDu, 0xB178u, 0xBD10u, 0x3FA5u, + 0xC680u, 0x4435u, 0x485Du, 0xCAE8u, 0x508Du, 0xD238u, 0xDE50u, 0x5CE5u, + 0x612Du, 0xE398u, 0xEFF0u, 0x6D45u, 0xF720u, 0x7595u, 0x79FDu, 0xFB48u, + 0x04DAu, 0x866Fu, 0x8A07u, 0x08B2u, 0x92D7u, 0x1062u, 0x1C0Au, 0x9EBFu, + 0xA377u, 0x21C2u, 0x2DAAu, 0xAF1Fu, 0x357Au, 0xB7CFu, 0xBBA7u, 0x3912u, + 0xC037u, 0x4282u, 0x4EEAu, 0xCC5Fu, 0x563Au, 0xD48Fu, 0xD8E7u, 0x5A52u, + 0x679Au, 0xE52Fu, 0xE947u, 0x6BF2u, 0xF197u, 0x7322u, 0x7F4Au, 0xFDFFu, + 0x06B7u, 0x8402u, 0x886Au, 0x0ADFu, 0x90BAu, 0x120Fu, 0x1E67u, 0x9CD2u, + 0xA11Au, 0x23AFu, 0x2FC7u, 0xAD72u, 0x3717u, 0xB5A2u, 0xB9CAu, 0x3B7Fu, + 0xC25Au, 0x40EFu, 0x4C87u, 0xCE32u, 0x5457u, 0xD6E2u, 0xDA8Au, 0x583Fu, + 0x65F7u, 0xE742u, 0xEB2Au, 0x699Fu, 0xF3FAu, 0x714Fu, 0x7D27u, 0xFF92u, + 0x09B4u, 0x8B01u, 0x8769u, 0x05DCu, 0x9FB9u, 0x1D0Cu, 0x1164u, 0x93D1u, + 0xAE19u, 0x2CACu, 0x20C4u, 0xA271u, 0x3814u, 0xBAA1u, 0xB6C9u, 0x347Cu, + 0xCD59u, 0x4FECu, 0x4384u, 0xC131u, 0x5B54u, 0xD9E1u, 0xD589u, 0x573Cu, + 0x6AF4u, 0xE841u, 0xE429u, 0x669Cu, 0xFCF9u, 0x7E4Cu, 0x7224u, 0xF091u, + 0x0BD9u, 0x896Cu, 0x8504u, 0x07B1u, 0x9DD4u, 0x1F61u, 0x1309u, 0x91BCu, + 0xAC74u, 0x2EC1u, 0x22A9u, 0xA01Cu, 0x3A79u, 0xB8CCu, 0xB4A4u, 0x3611u, + 0xCF34u, 0x4D81u, 0x41E9u, 0xC35Cu, 0x5939u, 0xDB8Cu, 0xD7E4u, 0x5551u, + 0x6899u, 0xEA2Cu, 0xE644u, 0x64F1u, 0xFE94u, 0x7C21u, 0x7049u, 0xF2FCu, + 0x0D6Eu, 0x8FDBu, 0x83B3u, 0x0106u, 0x9B63u, 0x19D6u, 0x15BEu, 0x970Bu, + 0xAAC3u, 0x2876u, 0x241Eu, 0xA6ABu, 0x3CCEu, 0xBE7Bu, 0xB213u, 0x30A6u, + 0xC983u, 0x4B36u, 0x475Eu, 0xC5EBu, 0x5F8Eu, 0xDD3Bu, 0xD153u, 0x53E6u, + 0x6E2Eu, 0xEC9Bu, 0xE0F3u, 0x6246u, 0xF823u, 0x7A96u, 0x76FEu, 0xF44Bu, + 0x0F03u, 0x8DB6u, 0x81DEu, 0x036Bu, 0x990Eu, 0x1BBBu, 0x17D3u, 0x9566u, + 0xA8AEu, 0x2A1Bu, 0x2673u, 0xA4C6u, 0x3EA3u, 0xBC16u, 0xB07Eu, 0x32CBu, + 0xCBEEu, 0x495Bu, 0x4533u, 0xC786u, 0x5DE3u, 0xDF56u, 0xD33Eu, 0x518Bu, + 0x6C43u, 0xEEF6u, 0xE29Eu, 0x602Bu, 0xFA4Eu, 0x78FBu, 0x7493u, 0xF626u + }, + { + 0x0000u, 0x1368u, 0x26D0u, 0x35B8u, 0x4DA0u, 0x5EC8u, 0x6B70u, 0x7818u, + 0x9B40u, 0x8828u, 0xBD90u, 0xAEF8u, 0xD6E0u, 0xC588u, 0xF030u, 0xE358u, + 0xBD37u, 0xAE5Fu, 0x9BE7u, 0x888Fu, 0xF097u, 0xE3FFu, 0xD647u, 0xC52Fu, + 0x2677u, 0x351Fu, 0x00A7u, 0x13CFu, 0x6BD7u, 0x78BFu, 0x4D07u, 0x5E6Fu, + 0xF1D9u, 0xE2B1u, 0xD709u, 0xC461u, 0xBC79u, 0xAF11u, 0x9AA9u, 0x89C1u, + 0x6A99u, 0x79F1u, 0x4C49u, 0x5F21u, 0x2739u, 0x3451u, 0x01E9u, 0x1281u, + 0x4CEEu, 0x5F86u, 0x6A3Eu, 0x7956u, 0x014Eu, 0x1226u, 0x279Eu, 0x34F6u, + 0xD7AEu, 0xC4C6u, 0xF17Eu, 0xE216u, 0x9A0Eu, 0x8966u, 0xBCDEu, 0xAFB6u, + 0x6805u, 0x7B6Du, 0x4ED5u, 0x5DBDu, 0x25A5u, 0x36CDu, 0x0375u, 0x101Du, + 0xF345u, 0xE02Du, 0xD595u, 0xC6FDu, 0xBEE5u, 0xAD8Du, 0x9835u, 0x8B5Du, + 0xD532u, 0xC65Au, 0xF3E2u, 0xE08Au, 0x9892u, 0x8BFAu, 0xBE42u, 0xAD2Au, + 0x4E72u, 0x5D1Au, 0x68A2u, 0x7BCAu, 0x03D2u, 0x10BAu, 0x2502u, 0x366Au, + 0x99DCu, 0x8AB4u, 0xBF0Cu, 0xAC64u, 0xD47Cu, 0xC714u, 0xF2ACu, 0xE1C4u, + 0x029Cu, 0x11F4u, 0x244Cu, 0x3724u, 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0x6BF9u, 0xF45Bu, 0x07A8u + }, + { + 0x0000u, 0xFB0Bu, 0x7DA1u, 0x86AAu, 0xFB42u, 0x0049u, 0x86E3u, 0x7DE8u, + 0x7D33u, 0x8638u, 0x0092u, 0xFB99u, 0x8671u, 0x7D7Au, 0xFBD0u, 0x00DBu, + 0xFA66u, 0x016Du, 0x87C7u, 0x7CCCu, 0x0124u, 0xFA2Fu, 0x7C85u, 0x878Eu, + 0x8755u, 0x7C5Eu, 0xFAF4u, 0x01FFu, 0x7C17u, 0x871Cu, 0x01B6u, 0xFABDu, + 0x7F7Bu, 0x8470u, 0x02DAu, 0xF9D1u, 0x8439u, 0x7F32u, 0xF998u, 0x0293u, + 0x0248u, 0xF943u, 0x7FE9u, 0x84E2u, 0xF90Au, 0x0201u, 0x84ABu, 0x7FA0u, + 0x851Du, 0x7E16u, 0xF8BCu, 0x03B7u, 0x7E5Fu, 0x8554u, 0x03FEu, 0xF8F5u, + 0xF82Eu, 0x0325u, 0x858Fu, 0x7E84u, 0x036Cu, 0xF867u, 0x7ECDu, 0x85C6u, + 0xFEF6u, 0x05FDu, 0x8357u, 0x785Cu, 0x05B4u, 0xFEBFu, 0x7815u, 0x831Eu, + 0x83C5u, 0x78CEu, 0xFE64u, 0x056Fu, 0x7887u, 0x838Cu, 0x0526u, 0xFE2Du, + 0x0490u, 0xFF9Bu, 0x7931u, 0x823Au, 0xFFD2u, 0x04D9u, 0x8273u, 0x7978u, + 0x79A3u, 0x82A8u, 0x0402u, 0xFF09u, 0x82E1u, 0x79EAu, 0xFF40u, 0x044Bu, + 0x818Du, 0x7A86u, 0xFC2Cu, 0x0727u, 0x7ACFu, 0x81C4u, 0x076Eu, 0xFC65u, + 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0x8989u, 0x7282u, 0xF428u, 0x0F23u, + 0x0FF8u, 0xF4F3u, 0x7259u, 0x8952u, 0xF4BAu, 0x0FB1u, 0x891Bu, 0x7210u, + 0xF7D6u, 0x0CDDu, 0x8A77u, 0x717Cu, 0x0C94u, 0xF79Fu, 0x7135u, 0x8A3Eu, + 0x8AE5u, 0x71EEu, 0xF744u, 0x0C4Fu, 0x71A7u, 0x8AACu, 0x0C06u, 0xF70Du, + 0x0DB0u, 0xF6BBu, 0x7011u, 0x8B1Au, 0xF6F2u, 0x0DF9u, 0x8B53u, 0x7058u, + 0x7083u, 0x8B88u, 0x0D22u, 0xF629u, 0x8BC1u, 0x70CAu, 0xF660u, 0x0D6Bu + }, + { + 0x0000u, 0xECB6u, 0x52DBu, 0xBE6Du, 0xA5B6u, 0x4900u, 0xF76Du, 0x1BDBu, + 0xC0DBu, 0x2C6Du, 0x9200u, 0x7EB6u, 0x656Du, 0x89DBu, 0x37B6u, 0xDB00u, + 0x0A01u, 0xE6B7u, 0x58DAu, 0xB46Cu, 0xAFB7u, 0x4301u, 0xFD6Cu, 0x11DAu, + 0xCADAu, 0x266Cu, 0x9801u, 0x74B7u, 0x6F6Cu, 0x83DAu, 0x3DB7u, 0xD101u, + 0x1402u, 0xF8B4u, 0x46D9u, 0xAA6Fu, 0xB1B4u, 0x5D02u, 0xE36Fu, 0x0FD9u, + 0xD4D9u, 0x386Fu, 0x8602u, 0x6AB4u, 0x716Fu, 0x9DD9u, 0x23B4u, 0xCF02u, + 0x1E03u, 0xF2B5u, 0x4CD8u, 0xA06Eu, 0xBBB5u, 0x5703u, 0xE96Eu, 0x05D8u, + 0xDED8u, 0x326Eu, 0x8C03u, 0x60B5u, 0x7B6Eu, 0x97D8u, 0x29B5u, 0xC503u, + 0x2804u, 0xC4B2u, 0x7ADFu, 0x9669u, 0x8DB2u, 0x6104u, 0xDF69u, 0x33DFu, + 0xE8DFu, 0x0469u, 0xBA04u, 0x56B2u, 0x4D69u, 0xA1DFu, 0x1FB2u, 0xF304u, + 0x2205u, 0xCEB3u, 0x70DEu, 0x9C68u, 0x87B3u, 0x6B05u, 0xD568u, 0x39DEu, + 0xE2DEu, 0x0E68u, 0xB005u, 0x5CB3u, 0x4768u, 0xABDEu, 0x15B3u, 0xF905u, + 0x3C06u, 0xD0B0u, 0x6EDDu, 0x826Bu, 0x99B0u, 0x7506u, 0xCB6Bu, 0x27DDu, + 0xFCDDu, 0x106Bu, 0xAE06u, 0x42B0u, 0x596Bu, 0xB5DDu, 0x0BB0u, 0xE706u, + 0x3607u, 0xDAB1u, 0x64DCu, 0x886Au, 0x93B1u, 0x7F07u, 0xC16Au, 0x2DDCu, + 0xF6DCu, 0x1A6Au, 0xA407u, 0x48B1u, 0x536Au, 0xBFDCu, 0x01B1u, 0xED07u, + 0x5008u, 0xBCBEu, 0x02D3u, 0xEE65u, 0xF5BEu, 0x1908u, 0xA765u, 0x4BD3u, + 0x90D3u, 0x7C65u, 0xC208u, 0x2EBEu, 0x3565u, 0xD9D3u, 0x67BEu, 0x8B08u, + 0x5A09u, 0xB6BFu, 0x08D2u, 0xE464u, 0xFFBFu, 0x1309u, 0xAD64u, 0x41D2u, + 0x9AD2u, 0x7664u, 0xC809u, 0x24BFu, 0x3F64u, 0xD3D2u, 0x6DBFu, 0x8109u, + 0x440Au, 0xA8BCu, 0x16D1u, 0xFA67u, 0xE1BCu, 0x0D0Au, 0xB367u, 0x5FD1u, + 0x84D1u, 0x6867u, 0xD60Au, 0x3ABCu, 0x2167u, 0xCDD1u, 0x73BCu, 0x9F0Au, + 0x4E0Bu, 0xA2BDu, 0x1CD0u, 0xF066u, 0xEBBDu, 0x070Bu, 0xB966u, 0x55D0u, + 0x8ED0u, 0x6266u, 0xDC0Bu, 0x30BDu, 0x2B66u, 0xC7D0u, 0x79BDu, 0x950Bu, + 0x780Cu, 0x94BAu, 0x2AD7u, 0xC661u, 0xDDBAu, 0x310Cu, 0x8F61u, 0x63D7u, + 0xB8D7u, 0x5461u, 0xEA0Cu, 0x06BAu, 0x1D61u, 0xF1D7u, 0x4FBAu, 0xA30Cu, + 0x720Du, 0x9EBBu, 0x20D6u, 0xCC60u, 0xD7BBu, 0x3B0Du, 0x8560u, 0x69D6u, + 0xB2D6u, 0x5E60u, 0xE00Du, 0x0CBBu, 0x1760u, 0xFBD6u, 0x45BBu, 0xA90Du, + 0x6C0Eu, 0x80B8u, 0x3ED5u, 0xD263u, 0xC9B8u, 0x250Eu, 0x9B63u, 0x77D5u, + 0xACD5u, 0x4063u, 0xFE0Eu, 0x12B8u, 0x0963u, 0xE5D5u, 0x5BB8u, 0xB70Eu, + 0x660Fu, 0x8AB9u, 0x34D4u, 0xD862u, 0xC3B9u, 0x2F0Fu, 0x9162u, 0x7DD4u, + 0xA6D4u, 0x4A62u, 0xF40Fu, 0x18B9u, 0x0362u, 0xEFD4u, 0x51B9u, 0xBD0Fu + }, + { + 0x0000u, 0xA010u, 0xCB97u, 0x6B87u, 0x1C99u, 0xBC89u, 0xD70Eu, 0x771Eu, + 0x3932u, 0x9922u, 0xF2A5u, 0x52B5u, 0x25ABu, 0x85BBu, 0xEE3Cu, 0x4E2Cu, + 0x7264u, 0xD274u, 0xB9F3u, 0x19E3u, 0x6EFDu, 0xCEEDu, 0xA56Au, 0x057Au, + 0x4B56u, 0xEB46u, 0x80C1u, 0x20D1u, 0x57CFu, 0xF7DFu, 0x9C58u, 0x3C48u, + 0xE4C8u, 0x44D8u, 0x2F5Fu, 0x8F4Fu, 0xF851u, 0x5841u, 0x33C6u, 0x93D6u, + 0xDDFAu, 0x7DEAu, 0x166Du, 0xB67Du, 0xC163u, 0x6173u, 0x0AF4u, 0xAAE4u, + 0x96ACu, 0x36BCu, 0x5D3Bu, 0xFD2Bu, 0x8A35u, 0x2A25u, 0x41A2u, 0xE1B2u, + 0xAF9Eu, 0x0F8Eu, 0x6409u, 0xC419u, 0xB307u, 0x1317u, 0x7890u, 0xD880u, + 0x4227u, 0xE237u, 0x89B0u, 0x29A0u, 0x5EBEu, 0xFEAEu, 0x9529u, 0x3539u, + 0x7B15u, 0xDB05u, 0xB082u, 0x1092u, 0x678Cu, 0xC79Cu, 0xAC1Bu, 0x0C0Bu, + 0x3043u, 0x9053u, 0xFBD4u, 0x5BC4u, 0x2CDAu, 0x8CCAu, 0xE74Du, 0x475Du, + 0x0971u, 0xA961u, 0xC2E6u, 0x62F6u, 0x15E8u, 0xB5F8u, 0xDE7Fu, 0x7E6Fu, + 0xA6EFu, 0x06FFu, 0x6D78u, 0xCD68u, 0xBA76u, 0x1A66u, 0x71E1u, 0xD1F1u, + 0x9FDDu, 0x3FCDu, 0x544Au, 0xF45Au, 0x8344u, 0x2354u, 0x48D3u, 0xE8C3u, + 0xD48Bu, 0x749Bu, 0x1F1Cu, 0xBF0Cu, 0xC812u, 0x6802u, 0x0385u, 0xA395u, + 0xEDB9u, 0x4DA9u, 0x262Eu, 0x863Eu, 0xF120u, 0x5130u, 0x3AB7u, 0x9AA7u, + 0x844Eu, 0x245Eu, 0x4FD9u, 0xEFC9u, 0x98D7u, 0x38C7u, 0x5340u, 0xF350u, + 0xBD7Cu, 0x1D6Cu, 0x76EBu, 0xD6FBu, 0xA1E5u, 0x01F5u, 0x6A72u, 0xCA62u, + 0xF62Au, 0x563Au, 0x3DBDu, 0x9DADu, 0xEAB3u, 0x4AA3u, 0x2124u, 0x8134u, + 0xCF18u, 0x6F08u, 0x048Fu, 0xA49Fu, 0xD381u, 0x7391u, 0x1816u, 0xB806u, + 0x6086u, 0xC096u, 0xAB11u, 0x0B01u, 0x7C1Fu, 0xDC0Fu, 0xB788u, 0x1798u, + 0x59B4u, 0xF9A4u, 0x9223u, 0x3233u, 0x452Du, 0xE53Du, 0x8EBAu, 0x2EAAu, + 0x12E2u, 0xB2F2u, 0xD975u, 0x7965u, 0x0E7Bu, 0xAE6Bu, 0xC5ECu, 0x65FCu, + 0x2BD0u, 0x8BC0u, 0xE047u, 0x4057u, 0x3749u, 0x9759u, 0xFCDEu, 0x5CCEu, + 0xC669u, 0x6679u, 0x0DFEu, 0xADEEu, 0xDAF0u, 0x7AE0u, 0x1167u, 0xB177u, + 0xFF5Bu, 0x5F4Bu, 0x34CCu, 0x94DCu, 0xE3C2u, 0x43D2u, 0x2855u, 0x8845u, + 0xB40Du, 0x141Du, 0x7F9Au, 0xDF8Au, 0xA894u, 0x0884u, 0x6303u, 0xC313u, + 0x8D3Fu, 0x2D2Fu, 0x46A8u, 0xE6B8u, 0x91A6u, 0x31B6u, 0x5A31u, 0xFA21u, + 0x22A1u, 0x82B1u, 0xE936u, 0x4926u, 0x3E38u, 0x9E28u, 0xF5AFu, 0x55BFu, + 0x1B93u, 0xBB83u, 0xD004u, 0x7014u, 0x070Au, 0xA71Au, 0xCC9Du, 0x6C8Du, + 0x50C5u, 0xF0D5u, 0x9B52u, 0x3B42u, 0x4C5Cu, 0xEC4Cu, 0x87CBu, 0x27DBu, + 0x69F7u, 0xC9E7u, 0xA260u, 0x0270u, 0x756Eu, 0xD57Eu, 0xBEF9u, 0x1EE9u + }, + { + 0x0000u, 0x832Bu, 0x8DE1u, 0x0ECAu, 0x9075u, 0x135Eu, 0x1D94u, 0x9EBFu, + 0xAB5Du, 0x2876u, 0x26BCu, 0xA597u, 0x3B28u, 0xB803u, 0xB6C9u, 0x35E2u, + 0xDD0Du, 0x5E26u, 0x50ECu, 0xD3C7u, 0x4D78u, 0xCE53u, 0xC099u, 0x43B2u, + 0x7650u, 0xF57Bu, 0xFBB1u, 0x789Au, 0xE625u, 0x650Eu, 0x6BC4u, 0xE8EFu, + 0x31ADu, 0xB286u, 0xBC4Cu, 0x3F67u, 0xA1D8u, 0x22F3u, 0x2C39u, 0xAF12u, + 0x9AF0u, 0x19DBu, 0x1711u, 0x943Au, 0x0A85u, 0x89AEu, 0x8764u, 0x044Fu, + 0xECA0u, 0x6F8Bu, 0x6141u, 0xE26Au, 0x7CD5u, 0xFFFEu, 0xF134u, 0x721Fu, + 0x47FDu, 0xC4D6u, 0xCA1Cu, 0x4937u, 0xD788u, 0x54A3u, 0x5A69u, 0xD942u, + 0x635Au, 0xE071u, 0xEEBBu, 0x6D90u, 0xF32Fu, 0x7004u, 0x7ECEu, 0xFDE5u, + 0xC807u, 0x4B2Cu, 0x45E6u, 0xC6CDu, 0x5872u, 0xDB59u, 0xD593u, 0x56B8u, + 0xBE57u, 0x3D7Cu, 0x33B6u, 0xB09Du, 0x2E22u, 0xAD09u, 0xA3C3u, 0x20E8u, + 0x150Au, 0x9621u, 0x98EBu, 0x1BC0u, 0x857Fu, 0x0654u, 0x089Eu, 0x8BB5u, + 0x52F7u, 0xD1DCu, 0xDF16u, 0x5C3Du, 0xC282u, 0x41A9u, 0x4F63u, 0xCC48u, + 0xF9AAu, 0x7A81u, 0x744Bu, 0xF760u, 0x69DFu, 0xEAF4u, 0xE43Eu, 0x6715u, + 0x8FFAu, 0x0CD1u, 0x021Bu, 0x8130u, 0x1F8Fu, 0x9CA4u, 0x926Eu, 0x1145u, + 0x24A7u, 0xA78Cu, 0xA946u, 0x2A6Du, 0xB4D2u, 0x37F9u, 0x3933u, 0xBA18u, + 0xC6B4u, 0x459Fu, 0x4B55u, 0xC87Eu, 0x56C1u, 0xD5EAu, 0xDB20u, 0x580Bu, + 0x6DE9u, 0xEEC2u, 0xE008u, 0x6323u, 0xFD9Cu, 0x7EB7u, 0x707Du, 0xF356u, + 0x1BB9u, 0x9892u, 0x9658u, 0x1573u, 0x8BCCu, 0x08E7u, 0x062Du, 0x8506u, + 0xB0E4u, 0x33CFu, 0x3D05u, 0xBE2Eu, 0x2091u, 0xA3BAu, 0xAD70u, 0x2E5Bu, + 0xF719u, 0x7432u, 0x7AF8u, 0xF9D3u, 0x676Cu, 0xE447u, 0xEA8Du, 0x69A6u, + 0x5C44u, 0xDF6Fu, 0xD1A5u, 0x528Eu, 0xCC31u, 0x4F1Au, 0x41D0u, 0xC2FBu, + 0x2A14u, 0xA93Fu, 0xA7F5u, 0x24DEu, 0xBA61u, 0x394Au, 0x3780u, 0xB4ABu, + 0x8149u, 0x0262u, 0x0CA8u, 0x8F83u, 0x113Cu, 0x9217u, 0x9CDDu, 0x1FF6u, + 0xA5EEu, 0x26C5u, 0x280Fu, 0xAB24u, 0x359Bu, 0xB6B0u, 0xB87Au, 0x3B51u, + 0x0EB3u, 0x8D98u, 0x8352u, 0x0079u, 0x9EC6u, 0x1DEDu, 0x1327u, 0x900Cu, + 0x78E3u, 0xFBC8u, 0xF502u, 0x7629u, 0xE896u, 0x6BBDu, 0x6577u, 0xE65Cu, + 0xD3BEu, 0x5095u, 0x5E5Fu, 0xDD74u, 0x43CBu, 0xC0E0u, 0xCE2Au, 0x4D01u, + 0x9443u, 0x1768u, 0x19A2u, 0x9A89u, 0x0436u, 0x871Du, 0x89D7u, 0x0AFCu, + 0x3F1Eu, 0xBC35u, 0xB2FFu, 0x31D4u, 0xAF6Bu, 0x2C40u, 0x228Au, 0xA1A1u, + 0x494Eu, 0xCA65u, 0xC4AFu, 0x4784u, 0xD93Bu, 0x5A10u, 0x54DAu, 0xD7F1u, + 0xE213u, 0x6138u, 0x6FF2u, 0xECD9u, 0x7266u, 0xF14Du, 0xFF87u, 0x7CACu + } }; __u16 crc_t10dif_generic(__u16 crc, const unsigned char *buffer, size_t len) { - unsigned int i; + const __u8 *i = (const __u8 *)buffer; + const __u8 *i_end = i + len; + const __u8 *i_last16 = i + (len / 16 * 16); - for (i = 0 ; i < len ; i++) - crc = (crc << 8) ^ t10_dif_crc_table[((crc >> 8) ^ buffer[i]) & 0xff]; + for (; i < i_last16; i += 16) { + crc = t10_dif_crc_table[15][i[0] ^ (__u8)(crc >> 8)] ^ + t10_dif_crc_table[14][i[1] ^ (__u8)(crc >> 0)] ^ + t10_dif_crc_table[13][i[2]] ^ + t10_dif_crc_table[12][i[3]] ^ + t10_dif_crc_table[11][i[4]] ^ + t10_dif_crc_table[10][i[5]] ^ + t10_dif_crc_table[9][i[6]] ^ + t10_dif_crc_table[8][i[7]] ^ + t10_dif_crc_table[7][i[8]] ^ + t10_dif_crc_table[6][i[9]] ^ + t10_dif_crc_table[5][i[10]] ^ + t10_dif_crc_table[4][i[11]] ^ + t10_dif_crc_table[3][i[12]] ^ + t10_dif_crc_table[2][i[13]] ^ + t10_dif_crc_table[1][i[14]] ^ + t10_dif_crc_table[0][i[15]]; + } + + for (; i < i_end; i++) + crc = t10_dif_crc_table[0][*i ^ (__u8)(crc >> 8)] ^ (crc << 8); return crc; }