@@ -67,6 +67,8 @@ The column name "all" can be used to enable all disabled-by-default built-in cou
.PP
\fB--quiet\fP Do not decode and print the system configuration header information.
.PP
++\fB--no-msr\fP Disable all the uses of the MSR driver.
++.PP
\fB--interval seconds\fP overrides the default 5.0 second measurement interval.
.PP
\fB--num_iterations num\fP number of the measurement iterations.
@@ -36,6 +36,7 @@
#include <linux/perf_event.h>
#include <asm/unistd.h>
#include <stdbool.h>
+#include <assert.h>
#define UNUSED(x) (void)(x)
@@ -265,6 +266,7 @@ unsigned int has_hwp_epp; /* IA32_HWP_REQUEST[bits 31:24] */
unsigned int has_hwp_pkg; /* IA32_HWP_REQUEST_PKG */
unsigned int first_counter_read = 1;
int ignore_stdin;
+bool no_msr;
int get_msr(int cpu, off_t offset, unsigned long long *msr);
@@ -1282,13 +1284,36 @@ int get_msr_fd(int cpu)
sprintf(pathname, "/dev/cpu/%d/msr", cpu);
fd = open(pathname, O_RDONLY);
if (fd < 0)
- err(-1, "%s open failed, try chown or chmod +r /dev/cpu/*/msr, or run as root", pathname);
+ err(-1, "%s open failed, try chown or chmod +r /dev/cpu/*/msr, "
+ "or run with --no-msr, or run as root", pathname);
fd_percpu[cpu] = fd;
return fd;
}
+static void bic_disable_msr_access(void)
+{
+ const unsigned long bic_msrs =
+ BIC_Avg_MHz |
+ BIC_Busy |
+ BIC_Bzy_MHz |
+ BIC_SMI |
+ BIC_CPU_c1 |
+ BIC_CPU_c3 |
+ BIC_CPU_c6 |
+ BIC_CPU_c7 |
+ BIC_Mod_c6 |
+ BIC_CoreTmp |
+ BIC_Totl_c0 |
+ BIC_Any_c0 |
+ BIC_GFX_c0 |
+ BIC_CPUGFX |
+ BIC_Pkgpc2 | BIC_Pkgpc3 | BIC_Pkgpc6 | BIC_Pkgpc7 | BIC_Pkgpc8 | BIC_Pkgpc9 | BIC_Pkgpc10 | BIC_PkgTmp;
+
+ bic_enabled &= ~bic_msrs;
+}
+
static long perf_event_open(struct perf_event_attr *hw_event, pid_t pid, int cpu, int group_fd, unsigned long flags)
{
return syscall(__NR_perf_event_open, hw_event, pid, cpu, group_fd, flags);
@@ -1328,6 +1353,8 @@ int get_msr(int cpu, off_t offset, unsigned long long *msr)
{
ssize_t retval;
+ assert(!no_msr);
+
retval = pread(get_msr_fd(cpu), msr, sizeof(*msr), offset);
if (retval != sizeof *msr)
@@ -1371,6 +1398,7 @@ void help(void)
" Override default 5-second measurement interval\n"
" -J, --Joules displays energy in Joules instead of Watts\n"
" -l, --list list column headers only\n"
+ " -M, --no-msr Disable all uses of the MSR driver\n"
" -n, --num_iterations num\n"
" number of the measurement iterations\n"
" -N, --header_iterations num\n"
@@ -2597,6 +2625,7 @@ unsigned long long snapshot_sysfs_counter(char *path)
int get_mp(int cpu, struct msr_counter *mp, unsigned long long *counterp)
{
if (mp->msr_num != 0) {
+ assert(!no_msr);
if (get_msr(cpu, mp->msr_num, counterp))
return -1;
} else {
@@ -2646,6 +2675,9 @@ int get_epb(int cpu)
return epb;
msr_fallback:
+ if (no_msr)
+ return -1;
+
get_msr(cpu, MSR_IA32_ENERGY_PERF_BIAS, &msr);
return msr & 0xf;
@@ -2865,7 +2897,7 @@ int get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
if (DO_BIC(BIC_CORE_THROT_CNT))
get_core_throt_cnt(cpu, &c->core_throt_cnt);
- if (platform->rapl_msrs & RAPL_AMD_F17H) {
+ if ((platform->rapl_msrs & RAPL_AMD_F17H) && !no_msr) {
if (get_msr(cpu, MSR_CORE_ENERGY_STAT, &msr))
return -14;
c->core_energy = msr & 0xFFFFFFFF;
@@ -2930,41 +2962,44 @@ int get_counters(struct thread_data *t, struct core_data *c, struct pkg_data *p)
if (DO_BIC(BIC_SYS_LPI))
p->sys_lpi = cpuidle_cur_sys_lpi_us;
- if (platform->rapl_msrs & RAPL_PKG) {
- if (get_msr_sum(cpu, MSR_PKG_ENERGY_STATUS, &msr))
- return -13;
- p->energy_pkg = msr;
- }
- if (platform->rapl_msrs & RAPL_CORE_ENERGY_STATUS) {
- if (get_msr_sum(cpu, MSR_PP0_ENERGY_STATUS, &msr))
- return -14;
- p->energy_cores = msr;
- }
- if (platform->rapl_msrs & RAPL_DRAM) {
- if (get_msr_sum(cpu, MSR_DRAM_ENERGY_STATUS, &msr))
- return -15;
- p->energy_dram = msr;
- }
- if (platform->rapl_msrs & RAPL_GFX) {
- if (get_msr_sum(cpu, MSR_PP1_ENERGY_STATUS, &msr))
- return -16;
- p->energy_gfx = msr;
- }
- if (platform->rapl_msrs & RAPL_PKG_PERF_STATUS) {
- if (get_msr_sum(cpu, MSR_PKG_PERF_STATUS, &msr))
- return -16;
- p->rapl_pkg_perf_status = msr;
- }
- if (platform->rapl_msrs & RAPL_DRAM_PERF_STATUS) {
- if (get_msr_sum(cpu, MSR_DRAM_PERF_STATUS, &msr))
- return -16;
- p->rapl_dram_perf_status = msr;
- }
- if (platform->rapl_msrs & RAPL_AMD_F17H) {
- if (get_msr_sum(cpu, MSR_PKG_ENERGY_STAT, &msr))
- return -13;
- p->energy_pkg = msr;
+ if (!no_msr) {
+ if (platform->rapl_msrs & RAPL_PKG) {
+ if (get_msr_sum(cpu, MSR_PKG_ENERGY_STATUS, &msr))
+ return -13;
+ p->energy_pkg = msr;
+ }
+ if (platform->rapl_msrs & RAPL_CORE_ENERGY_STATUS) {
+ if (get_msr_sum(cpu, MSR_PP0_ENERGY_STATUS, &msr))
+ return -14;
+ p->energy_cores = msr;
+ }
+ if (platform->rapl_msrs & RAPL_DRAM) {
+ if (get_msr_sum(cpu, MSR_DRAM_ENERGY_STATUS, &msr))
+ return -15;
+ p->energy_dram = msr;
+ }
+ if (platform->rapl_msrs & RAPL_GFX) {
+ if (get_msr_sum(cpu, MSR_PP1_ENERGY_STATUS, &msr))
+ return -16;
+ p->energy_gfx = msr;
+ }
+ if (platform->rapl_msrs & RAPL_PKG_PERF_STATUS) {
+ if (get_msr_sum(cpu, MSR_PKG_PERF_STATUS, &msr))
+ return -16;
+ p->rapl_pkg_perf_status = msr;
+ }
+ if (platform->rapl_msrs & RAPL_DRAM_PERF_STATUS) {
+ if (get_msr_sum(cpu, MSR_DRAM_PERF_STATUS, &msr))
+ return -16;
+ p->rapl_dram_perf_status = msr;
+ }
+ if (platform->rapl_msrs & RAPL_AMD_F17H) {
+ if (get_msr_sum(cpu, MSR_PKG_ENERGY_STAT, &msr))
+ return -13;
+ p->energy_pkg = msr;
+ }
}
+
if (DO_BIC(BIC_PkgTmp)) {
if (get_msr(cpu, MSR_IA32_PACKAGE_THERM_STATUS, &msr))
return -17;
@@ -3072,7 +3107,7 @@ void probe_cst_limit(void)
unsigned long long msr;
int *pkg_cstate_limits;
- if (!platform->has_nhm_msrs)
+ if (!platform->has_nhm_msrs || no_msr)
return;
switch (platform->cst_limit) {
@@ -3116,7 +3151,7 @@ static void dump_platform_info(void)
unsigned long long msr;
unsigned int ratio;
- if (!platform->has_nhm_msrs)
+ if (!platform->has_nhm_msrs || no_msr)
return;
get_msr(base_cpu, MSR_PLATFORM_INFO, &msr);
@@ -3134,7 +3169,7 @@ static void dump_power_ctl(void)
{
unsigned long long msr;
- if (!platform->has_nhm_msrs)
+ if (!platform->has_nhm_msrs || no_msr)
return;
get_msr(base_cpu, MSR_IA32_POWER_CTL, &msr);
@@ -3340,7 +3375,7 @@ static void dump_cst_cfg(void)
{
unsigned long long msr;
- if (!platform->has_nhm_msrs)
+ if (!platform->has_nhm_msrs || no_msr)
return;
get_msr(base_cpu, MSR_PKG_CST_CONFIG_CONTROL, &msr);
@@ -3412,7 +3447,7 @@ void print_irtl(void)
{
unsigned long long msr;
- if (!platform->has_irtl_msrs)
+ if (!platform->has_irtl_msrs || no_msr)
return;
if (platform->supported_cstates & PC3) {
@@ -4193,6 +4228,8 @@ int get_msr_sum(int cpu, off_t offset, unsigned long long *msr)
int ret, idx;
unsigned long long msr_cur, msr_last;
+ assert(!no_msr);
+
if (!per_cpu_msr_sum)
return 1;
@@ -4221,6 +4258,8 @@ static int update_msr_sum(struct thread_data *t, struct core_data *c, struct pkg
UNUSED(c);
UNUSED(p);
+ assert(!no_msr);
+
for (i = IDX_PKG_ENERGY; i < IDX_COUNT; i++) {
unsigned long long msr_cur, msr_last;
off_t offset;
@@ -4465,7 +4504,7 @@ void check_permissions(void)
sprintf(pathname, "/dev/cpu/%d/msr", base_cpu);
if (euidaccess(pathname, R_OK)) {
do_exit++;
- warn("/dev/cpu/0/msr open failed, try chown or chmod +r /dev/cpu/*/msr");
+ warn("/dev/cpu/0/msr open failed, try chown or chmod +r /dev/cpu/*/msr, or run with --no-msr");
}
/* if all else fails, thell them to be root */
@@ -4482,7 +4521,7 @@ void probe_bclk(void)
unsigned long long msr;
unsigned int base_ratio;
- if (!platform->has_nhm_msrs)
+ if (!platform->has_nhm_msrs || no_msr)
return;
if (platform->bclk_freq == BCLK_100MHZ)
@@ -4522,7 +4561,7 @@ static void dump_turbo_ratio_info(void)
if (!has_turbo)
return;
- if (!platform->has_nhm_msrs)
+ if (!platform->has_nhm_msrs || no_msr)
return;
if (platform->trl_msrs & TRL_LIMIT2)
@@ -4845,6 +4884,9 @@ int print_hwp(struct thread_data *t, struct core_data *c, struct pkg_data *p)
UNUSED(c);
UNUSED(p);
+ if (no_msr)
+ return 0;
+
if (!has_hwp)
return 0;
@@ -4931,6 +4973,9 @@ int print_perf_limit(struct thread_data *t, struct core_data *c, struct pkg_data
UNUSED(c);
UNUSED(p);
+ if (no_msr)
+ return 0;
+
cpu = t->cpu_id;
/* per-package */
@@ -5264,7 +5309,7 @@ int print_rapl(struct thread_data *t, struct core_data *c, struct pkg_data *p)
*/
void probe_rapl(void)
{
- if (!platform->rapl_msrs)
+ if (!platform->rapl_msrs || no_msr)
return;
if (genuine_intel)
@@ -5320,7 +5365,7 @@ int set_temperature_target(struct thread_data *t, struct core_data *c, struct pk
}
/* Temperature Target MSR is Nehalem and newer only */
- if (!platform->has_nhm_msrs)
+ if (!platform->has_nhm_msrs || no_msr)
goto guess;
if (get_msr(base_cpu, MSR_IA32_TEMPERATURE_TARGET, &msr))
@@ -5367,6 +5412,9 @@ int print_thermal(struct thread_data *t, struct core_data *c, struct pkg_data *p
UNUSED(c);
UNUSED(p);
+ if (no_msr)
+ return 0;
+
if (!(do_dts || do_ptm))
return 0;
@@ -5464,6 +5512,9 @@ void decode_feature_control_msr(void)
{
unsigned long long msr;
+ if (no_msr)
+ return;
+
if (!get_msr(base_cpu, MSR_IA32_FEAT_CTL, &msr))
fprintf(outf, "cpu%d: MSR_IA32_FEATURE_CONTROL: 0x%08llx (%sLocked %s)\n",
base_cpu, msr, msr & FEAT_CTL_LOCKED ? "" : "UN-", msr & (1 << 18) ? "SGX" : "");
@@ -5473,6 +5524,9 @@ void decode_misc_enable_msr(void)
{
unsigned long long msr;
+ if (no_msr)
+ return;
+
if (!genuine_intel)
return;
@@ -5490,6 +5544,9 @@ void decode_misc_feature_control(void)
{
unsigned long long msr;
+ if (no_msr)
+ return;
+
if (!platform->has_msr_misc_feature_control)
return;
@@ -5511,6 +5568,9 @@ void decode_misc_pwr_mgmt_msr(void)
{
unsigned long long msr;
+ if (no_msr)
+ return;
+
if (!platform->has_msr_misc_pwr_mgmt)
return;
@@ -5530,6 +5590,9 @@ void decode_c6_demotion_policy_msr(void)
{
unsigned long long msr;
+ if (no_msr)
+ return;
+
if (!platform->has_msr_c6_demotion_policy_config)
return;
@@ -5626,7 +5689,7 @@ void probe_cstates(void)
if (platform->has_msr_module_c6_res_ms)
BIC_PRESENT(BIC_Mod_c6);
- if (platform->has_ext_cst_msrs) {
+ if (platform->has_ext_cst_msrs && !no_msr) {
BIC_PRESENT(BIC_Totl_c0);
BIC_PRESENT(BIC_Any_c0);
BIC_PRESENT(BIC_GFX_c0);
@@ -5714,10 +5777,12 @@ void process_cpuid()
ecx_flags = ecx;
edx_flags = edx;
- if (get_msr(sched_getcpu(), MSR_IA32_UCODE_REV, &ucode_patch))
- warnx("get_msr(UCODE)");
- else
- ucode_patch_valid = true;
+ if (!no_msr) {
+ if (get_msr(sched_getcpu(), MSR_IA32_UCODE_REV, &ucode_patch))
+ warnx("get_msr(UCODE)");
+ else
+ ucode_patch_valid = true;
+ }
/*
* check max extended function levels of CPUID.
@@ -5892,7 +5957,7 @@ void probe_pm_features(void)
probe_thermal();
- if (platform->has_nhm_msrs)
+ if (platform->has_nhm_msrs && !no_msr)
BIC_PRESENT(BIC_SMI);
if (!quiet)
@@ -6252,8 +6317,10 @@ void turbostat_init()
{
setup_all_buffers(true);
set_base_cpu();
- check_dev_msr();
- check_permissions();
+ if (!no_msr) {
+ check_dev_msr();
+ check_permissions();
+ }
process_cpuid();
probe_pm_features();
linux_perf_init();
@@ -6370,6 +6437,9 @@ int add_counter(unsigned int msr_num, char *path, char *name,
{
struct msr_counter *msrp;
+ if (no_msr && msr_num)
+ errx(1, "Requested MSR counter 0x%x, but in --no-msr mode", msr_num);
+
msrp = calloc(1, sizeof(struct msr_counter));
if (msrp == NULL) {
perror("calloc");
@@ -6674,6 +6744,7 @@ void cmdline(int argc, char **argv)
{ "list", no_argument, 0, 'l' },
{ "out", required_argument, 0, 'o' },
{ "quiet", no_argument, 0, 'q' },
+ { "no-msr", no_argument, 0, 'M' },
{ "show", required_argument, 0, 's' },
{ "Summary", no_argument, 0, 'S' },
{ "TCC", required_argument, 0, 'T' },
@@ -6683,7 +6754,22 @@ void cmdline(int argc, char **argv)
progname = argv[0];
- while ((opt = getopt_long_only(argc, argv, "+C:c:Dde:hi:Jn:o:qST:v", long_options, &option_index)) != -1) {
+ /*
+ * Parse some options early, because they may make other options invalid,
+ * like adding the MSR counter with --add and at the same time using --no-msr.
+ */
+ while ((opt = getopt_long_only(argc, argv, "M", long_options, &option_index)) != -1) {
+ switch (opt) {
+ case 'M':
+ no_msr = 1;
+ break;
+ default:
+ break;
+ }
+ }
+ optind = 0;
+
+ while ((opt = getopt_long_only(argc, argv, "+C:c:Dde:hi:Jn:o:qMST:v", long_options, &option_index)) != -1) {
switch (opt) {
case 'a':
parse_add_command(optarg);
@@ -6741,6 +6827,9 @@ void cmdline(int argc, char **argv)
case 'q':
quiet = 1;
break;
+ case 'M':
+ /* Parsed earlier */
+ break;
case 'n':
num_iterations = strtod(optarg, NULL);
@@ -6817,6 +6906,9 @@ int main(int argc, char **argv)
outf = stderr;
cmdline(argc, argv);
+ if (no_msr)
+ bic_disable_msr_access();
+
if (!quiet) {
print_version();
print_bootcmd();
@@ -6829,7 +6921,8 @@ int main(int argc, char **argv)
turbostat_init();
- msr_sum_record();
+ if (!no_msr)
+ msr_sum_record();
/* dump counters and exit */
if (dump_only)