@@ -114,6 +114,7 @@ static u32 opt_num_xsks = 1;
static u32 prog_id;
static bool opt_busy_poll;
static bool opt_reduced_cap;
+static clockid_t opt_clock = CLOCK_MONOTONIC;
struct vlan_ethhdr {
unsigned char h_dest[6];
@@ -178,15 +179,40 @@ struct xsk_socket_info {
u32 outstanding_tx;
};
+static const struct clockid_map {
+ const char *name;
+ clockid_t clockid;
+} clockids_map[] = {
+ { "REALTIME", CLOCK_REALTIME },
+ { "TAI", CLOCK_TAI },
+ { "BOOTTIME", CLOCK_BOOTTIME },
+ { "MONOTONIC", CLOCK_MONOTONIC },
+ { NULL }
+};
+
static int num_socks;
struct xsk_socket_info *xsks[MAX_SOCKS];
int sock;
+static int get_clockid(clockid_t *id, const char *name)
+{
+ const struct clockid_map *clk;
+
+ for (clk = clockids_map; clk->name; clk++) {
+ if (strcasecmp(clk->name, name) == 0) {
+ *id = clk->clockid;
+ return 0;
+ }
+ }
+
+ return -1;
+}
+
static unsigned long get_nsecs(void)
{
struct timespec ts;
- clock_gettime(CLOCK_MONOTONIC, &ts);
+ clock_gettime(opt_clock, &ts);
return ts.tv_sec * 1000000000UL + ts.tv_nsec;
}
@@ -965,6 +991,7 @@ static struct option long_options[] = {
{"shared-umem", no_argument, 0, 'M'},
{"force", no_argument, 0, 'F'},
{"duration", required_argument, 0, 'd'},
+ {"clock", required_argument, 0, 'w'},
{"batch-size", required_argument, 0, 'b'},
{"tx-pkt-count", required_argument, 0, 'C'},
{"tx-pkt-size", required_argument, 0, 's'},
@@ -1006,6 +1033,7 @@ static void usage(const char *prog)
" -F, --force Force loading the XDP prog\n"
" -d, --duration=n Duration in secs to run command.\n"
" Default: forever.\n"
+ " -w, --clock=CLOCK Clock NAME (default MONOTONIC).\n"
" -b, --batch-size=n Batch size for sending or receiving\n"
" packets. Default: %d\n"
" -C, --tx-pkt-count=n Number of packets to send.\n"
@@ -1041,7 +1069,7 @@ static void parse_command_line(int argc, char **argv)
opterr = 0;
for (;;) {
- c = getopt_long(argc, argv, "Frtli:q:pSNn:czf:muMd:b:C:s:P:VJ:K:G:H:xQaI:BR",
+ c = getopt_long(argc, argv, "Frtli:q:pSNn:w:czf:muMd:b:C:s:P:VJ:K:G:H:xQaI:BR",
long_options, &option_index);
if (c == -1)
break;
@@ -1075,6 +1103,14 @@ static void parse_command_line(int argc, char **argv)
case 'n':
opt_interval = atoi(optarg);
break;
+ case 'w':
+ if (get_clockid(&opt_clock, optarg)) {
+ fprintf(stderr,
+ "ERROR: Invalid clock %s. Default to CLOCK_MONOTONIC.\n",
+ optarg);
+ opt_clock = CLOCK_MONOTONIC;
+ }
+ break;
case 'z':
opt_xdp_bind_flags |= XDP_ZEROCOPY;
break;
User specifies the clock selection by using -w CLOCK or --clock=CLOCK where CLOCK=[REALTIME, TAI, BOOTTIME, MONOTONIC]. The default CLOCK selection is MONOTONIC. The implementation of clock selection parsing is borrowed from iproute2/tc/q_taprio.c Signed-off-by: Ong Boon Leong <boon.leong.ong@intel.com> --- samples/bpf/xdpsock_user.c | 40 ++++++++++++++++++++++++++++++++++++-- 1 file changed, 38 insertions(+), 2 deletions(-)