4 * Builtin stat command: Give a precise performance counters summary
5 * overview about any workload, CPU or specific PID.
9 $ perf stat ./hackbench 10
13 Performance counter stats for './hackbench 10':
15 1708.761321 task-clock # 11.037 CPUs utilized
16 41,190 context-switches # 0.024 M/sec
17 6,735 CPU-migrations # 0.004 M/sec
18 17,318 page-faults # 0.010 M/sec
19 5,205,202,243 cycles # 3.046 GHz
20 3,856,436,920 stalled-cycles-frontend # 74.09% frontend cycles idle
21 1,600,790,871 stalled-cycles-backend # 30.75% backend cycles idle
22 2,603,501,247 instructions # 0.50 insns per cycle
23 # 1.48 stalled cycles per insn
24 484,357,498 branches # 283.455 M/sec
25 6,388,934 branch-misses # 1.32% of all branches
27 0.154822978 seconds time elapsed
30 * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
32 * Improvements and fixes by:
34 * Arjan van de Ven <arjan@linux.intel.com>
35 * Yanmin Zhang <yanmin.zhang@intel.com>
36 * Wu Fengguang <fengguang.wu@intel.com>
37 * Mike Galbraith <efault@gmx.de>
38 * Paul Mackerras <paulus@samba.org>
39 * Jaswinder Singh Rajput <jaswinder@kernel.org>
41 * Released under the GPL v2. (and only v2, not any later version)
46 #include "util/cgroup.h"
47 #include "util/util.h"
48 #include "util/parse-options.h"
49 #include "util/parse-events.h"
51 #include "util/event.h"
52 #include "util/evlist.h"
53 #include "util/evsel.h"
54 #include "util/debug.h"
55 #include "util/color.h"
56 #include "util/stat.h"
57 #include "util/header.h"
58 #include "util/cpumap.h"
59 #include "util/thread.h"
60 #include "util/thread_map.h"
63 #include <sys/prctl.h>
66 #define DEFAULT_SEPARATOR " "
67 #define CNTR_NOT_SUPPORTED "<not supported>"
68 #define CNTR_NOT_COUNTED "<not counted>"
70 static void print_stat(int argc, const char **argv);
71 static void print_counter_aggr(struct perf_evsel *counter, char *prefix);
72 static void print_counter(struct perf_evsel *counter, char *prefix);
73 static void print_aggr(char *prefix);
75 /* Default events used for perf stat -T */
76 static const char * const transaction_attrs[] = {
88 /* More limited version when the CPU does not have all events. */
89 static const char * const transaction_limited_attrs[] = {
99 /* must match transaction_attrs and the beginning limited_attrs */
110 static struct perf_evlist *evsel_list;
112 static struct target target = {
123 static int run_count = 1;
124 static bool no_inherit = false;
125 static bool scale = true;
126 static enum aggr_mode aggr_mode = AGGR_GLOBAL;
127 static volatile pid_t child_pid = -1;
128 static bool null_run = false;
129 static int detailed_run = 0;
130 static bool transaction_run;
131 static bool big_num = true;
132 static int big_num_opt = -1;
133 static const char *csv_sep = NULL;
134 static bool csv_output = false;
135 static bool group = false;
136 static FILE *output = NULL;
137 static const char *pre_cmd = NULL;
138 static const char *post_cmd = NULL;
139 static bool sync_run = false;
140 static unsigned int interval = 0;
141 static unsigned int initial_delay = 0;
142 static unsigned int unit_width = 4; /* strlen("unit") */
143 static bool forever = false;
144 static struct timespec ref_time;
145 static struct cpu_map *aggr_map;
146 static int (*aggr_get_id)(struct cpu_map *m, int cpu);
148 static volatile int done = 0;
151 struct stats res_stats[3];
154 static inline void diff_timespec(struct timespec *r, struct timespec *a,
157 r->tv_sec = a->tv_sec - b->tv_sec;
158 if (a->tv_nsec < b->tv_nsec) {
159 r->tv_nsec = a->tv_nsec + 1000000000L - b->tv_nsec;
162 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
166 static inline struct cpu_map *perf_evsel__cpus(struct perf_evsel *evsel)
168 return (evsel->cpus && !target.cpu_list) ? evsel->cpus : evsel_list->cpus;
171 static inline int perf_evsel__nr_cpus(struct perf_evsel *evsel)
173 return perf_evsel__cpus(evsel)->nr;
176 static void perf_evsel__reset_stat_priv(struct perf_evsel *evsel)
179 struct perf_stat *ps = evsel->priv;
181 for (i = 0; i < 3; i++)
182 init_stats(&ps->res_stats[i]);
185 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
187 evsel->priv = zalloc(sizeof(struct perf_stat));
188 if (evsel->priv == NULL)
190 perf_evsel__reset_stat_priv(evsel);
194 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
199 static int perf_evsel__alloc_prev_raw_counts(struct perf_evsel *evsel)
204 sz = sizeof(*evsel->counts) +
205 (perf_evsel__nr_cpus(evsel) * sizeof(struct perf_counts_values));
211 evsel->prev_raw_counts = addr;
216 static void perf_evsel__free_prev_raw_counts(struct perf_evsel *evsel)
218 zfree(&evsel->prev_raw_counts);
221 static void perf_evlist__free_stats(struct perf_evlist *evlist)
223 struct perf_evsel *evsel;
225 evlist__for_each(evlist, evsel) {
226 perf_evsel__free_stat_priv(evsel);
227 perf_evsel__free_counts(evsel);
228 perf_evsel__free_prev_raw_counts(evsel);
232 static int perf_evlist__alloc_stats(struct perf_evlist *evlist, bool alloc_raw)
234 struct perf_evsel *evsel;
236 evlist__for_each(evlist, evsel) {
237 if (perf_evsel__alloc_stat_priv(evsel) < 0 ||
238 perf_evsel__alloc_counts(evsel, perf_evsel__nr_cpus(evsel)) < 0 ||
239 (alloc_raw && perf_evsel__alloc_prev_raw_counts(evsel) < 0))
246 perf_evlist__free_stats(evlist);
250 static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
251 static struct stats runtime_cycles_stats[MAX_NR_CPUS];
252 static struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
253 static struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
254 static struct stats runtime_branches_stats[MAX_NR_CPUS];
255 static struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
256 static struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
257 static struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
258 static struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
259 static struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
260 static struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
261 static struct stats runtime_cycles_in_tx_stats[MAX_NR_CPUS];
262 static struct stats walltime_nsecs_stats;
263 static struct stats runtime_transaction_stats[MAX_NR_CPUS];
264 static struct stats runtime_elision_stats[MAX_NR_CPUS];
266 static void perf_stat__reset_stats(struct perf_evlist *evlist)
268 struct perf_evsel *evsel;
270 evlist__for_each(evlist, evsel) {
271 perf_evsel__reset_stat_priv(evsel);
272 perf_evsel__reset_counts(evsel, perf_evsel__nr_cpus(evsel));
275 memset(runtime_nsecs_stats, 0, sizeof(runtime_nsecs_stats));
276 memset(runtime_cycles_stats, 0, sizeof(runtime_cycles_stats));
277 memset(runtime_stalled_cycles_front_stats, 0, sizeof(runtime_stalled_cycles_front_stats));
278 memset(runtime_stalled_cycles_back_stats, 0, sizeof(runtime_stalled_cycles_back_stats));
279 memset(runtime_branches_stats, 0, sizeof(runtime_branches_stats));
280 memset(runtime_cacherefs_stats, 0, sizeof(runtime_cacherefs_stats));
281 memset(runtime_l1_dcache_stats, 0, sizeof(runtime_l1_dcache_stats));
282 memset(runtime_l1_icache_stats, 0, sizeof(runtime_l1_icache_stats));
283 memset(runtime_ll_cache_stats, 0, sizeof(runtime_ll_cache_stats));
284 memset(runtime_itlb_cache_stats, 0, sizeof(runtime_itlb_cache_stats));
285 memset(runtime_dtlb_cache_stats, 0, sizeof(runtime_dtlb_cache_stats));
286 memset(runtime_cycles_in_tx_stats, 0,
287 sizeof(runtime_cycles_in_tx_stats));
288 memset(runtime_transaction_stats, 0,
289 sizeof(runtime_transaction_stats));
290 memset(runtime_elision_stats, 0, sizeof(runtime_elision_stats));
291 memset(&walltime_nsecs_stats, 0, sizeof(walltime_nsecs_stats));
294 static int create_perf_stat_counter(struct perf_evsel *evsel)
296 struct perf_event_attr *attr = &evsel->attr;
299 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
300 PERF_FORMAT_TOTAL_TIME_RUNNING;
302 attr->inherit = !no_inherit;
304 if (target__has_cpu(&target))
305 return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
307 if (!target__has_task(&target) && perf_evsel__is_group_leader(evsel)) {
310 attr->enable_on_exec = 1;
313 return perf_evsel__open_per_thread(evsel, evsel_list->threads);
317 * Does the counter have nsecs as a unit?
319 static inline int nsec_counter(struct perf_evsel *evsel)
321 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
322 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
328 static struct perf_evsel *nth_evsel(int n)
330 static struct perf_evsel **array;
331 static int array_len;
332 struct perf_evsel *ev;
335 /* Assumes this only called when evsel_list does not change anymore. */
337 evlist__for_each(evsel_list, ev)
339 array = malloc(array_len * sizeof(void *));
343 evlist__for_each(evsel_list, ev)
352 * Update various tracking values we maintain to print
353 * more semantic information such as miss/hit ratios,
354 * instruction rates, etc:
356 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
358 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
359 update_stats(&runtime_nsecs_stats[0], count[0]);
360 else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
361 update_stats(&runtime_cycles_stats[0], count[0]);
362 else if (transaction_run &&
363 perf_evsel__cmp(counter, nth_evsel(T_CYCLES_IN_TX)))
364 update_stats(&runtime_cycles_in_tx_stats[0], count[0]);
365 else if (transaction_run &&
366 perf_evsel__cmp(counter, nth_evsel(T_TRANSACTION_START)))
367 update_stats(&runtime_transaction_stats[0], count[0]);
368 else if (transaction_run &&
369 perf_evsel__cmp(counter, nth_evsel(T_ELISION_START)))
370 update_stats(&runtime_elision_stats[0], count[0]);
371 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
372 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
373 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
374 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
375 else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
376 update_stats(&runtime_branches_stats[0], count[0]);
377 else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
378 update_stats(&runtime_cacherefs_stats[0], count[0]);
379 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
380 update_stats(&runtime_l1_dcache_stats[0], count[0]);
381 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
382 update_stats(&runtime_l1_icache_stats[0], count[0]);
383 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
384 update_stats(&runtime_ll_cache_stats[0], count[0]);
385 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
386 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
387 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
388 update_stats(&runtime_itlb_cache_stats[0], count[0]);
391 static void zero_per_pkg(struct perf_evsel *counter)
393 if (counter->per_pkg_mask)
394 memset(counter->per_pkg_mask, 0, MAX_NR_CPUS);
397 static int check_per_pkg(struct perf_evsel *counter, int cpu, bool *skip)
399 unsigned long *mask = counter->per_pkg_mask;
400 struct cpu_map *cpus = perf_evsel__cpus(counter);
405 if (!counter->per_pkg)
408 if (cpu_map__empty(cpus))
412 mask = zalloc(MAX_NR_CPUS);
416 counter->per_pkg_mask = mask;
419 s = cpu_map__get_socket(cpus, cpu);
423 *skip = test_and_set_bit(s, mask) == 1;
427 static int read_cb(struct perf_evsel *evsel, int cpu, int thread __maybe_unused,
428 struct perf_counts_values *count)
430 struct perf_counts_values *aggr = &evsel->counts->aggr;
431 static struct perf_counts_values zero;
434 if (check_per_pkg(evsel, cpu, &skip)) {
435 pr_err("failed to read per-pkg counter\n");
446 if (!evsel->snapshot)
447 perf_evsel__compute_deltas(evsel, cpu, count);
448 perf_counts_values__scale(count, scale, NULL);
449 evsel->counts->cpu[cpu] = *count;
450 update_shadow_stats(evsel, count->values);
453 aggr->val += count->val;
455 aggr->ena += count->ena;
456 aggr->run += count->run;
465 static int read_counter(struct perf_evsel *counter);
468 * Read out the results of a single counter:
469 * aggregate counts across CPUs in system-wide mode
471 static int read_counter_aggr(struct perf_evsel *counter)
473 struct perf_counts_values *aggr = &counter->counts->aggr;
474 struct perf_stat *ps = counter->priv;
475 u64 *count = counter->counts->aggr.values;
478 aggr->val = aggr->ena = aggr->run = 0;
480 if (read_counter(counter))
483 if (!counter->snapshot)
484 perf_evsel__compute_deltas(counter, -1, aggr);
485 perf_counts_values__scale(aggr, scale, &counter->counts->scaled);
487 for (i = 0; i < 3; i++)
488 update_stats(&ps->res_stats[i], count[i]);
491 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
492 perf_evsel__name(counter), count[0], count[1], count[2]);
496 * Save the full runtime - to allow normalization during printout:
498 update_shadow_stats(counter, count);
504 * Read out the results of a single counter:
505 * do not aggregate counts across CPUs in system-wide mode
507 static int read_counter(struct perf_evsel *counter)
509 int nthreads = thread_map__nr(evsel_list->threads);
510 int ncpus = perf_evsel__nr_cpus(counter);
513 if (counter->system_wide)
516 if (counter->per_pkg)
517 zero_per_pkg(counter);
519 for (thread = 0; thread < nthreads; thread++) {
520 for (cpu = 0; cpu < ncpus; cpu++) {
521 if (perf_evsel__read_cb(counter, cpu, thread, read_cb))
529 static void print_interval(void)
531 static int num_print_interval;
532 struct perf_evsel *counter;
533 struct perf_stat *ps;
534 struct timespec ts, rs;
537 if (aggr_mode == AGGR_GLOBAL) {
538 evlist__for_each(evsel_list, counter) {
540 memset(ps->res_stats, 0, sizeof(ps->res_stats));
541 read_counter_aggr(counter);
544 evlist__for_each(evsel_list, counter) {
546 memset(ps->res_stats, 0, sizeof(ps->res_stats));
547 read_counter(counter);
551 clock_gettime(CLOCK_MONOTONIC, &ts);
552 diff_timespec(&rs, &ts, &ref_time);
553 sprintf(prefix, "%6lu.%09lu%s", rs.tv_sec, rs.tv_nsec, csv_sep);
555 if (num_print_interval == 0 && !csv_output) {
558 fprintf(output, "# time socket cpus counts %*s events\n", unit_width, "unit");
561 fprintf(output, "# time core cpus counts %*s events\n", unit_width, "unit");
564 fprintf(output, "# time CPU counts %*s events\n", unit_width, "unit");
568 fprintf(output, "# time counts %*s events\n", unit_width, "unit");
572 if (++num_print_interval == 25)
573 num_print_interval = 0;
581 evlist__for_each(evsel_list, counter)
582 print_counter(counter, prefix);
586 evlist__for_each(evsel_list, counter)
587 print_counter_aggr(counter, prefix);
593 static void handle_initial_delay(void)
595 struct perf_evsel *counter;
598 const int ncpus = cpu_map__nr(evsel_list->cpus),
599 nthreads = thread_map__nr(evsel_list->threads);
601 usleep(initial_delay * 1000);
602 evlist__for_each(evsel_list, counter)
603 perf_evsel__enable(counter, ncpus, nthreads);
607 static volatile int workload_exec_errno;
610 * perf_evlist__prepare_workload will send a SIGUSR1
611 * if the fork fails, since we asked by setting its
612 * want_signal to true.
614 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
615 void *ucontext __maybe_unused)
617 workload_exec_errno = info->si_value.sival_int;
620 static int __run_perf_stat(int argc, const char **argv)
623 unsigned long long t0, t1;
624 struct perf_evsel *counter;
628 const bool forks = (argc > 0);
631 ts.tv_sec = interval / 1000;
632 ts.tv_nsec = (interval % 1000) * 1000000;
639 if (perf_evlist__prepare_workload(evsel_list, &target, argv, false,
640 workload_exec_failed_signal) < 0) {
641 perror("failed to prepare workload");
644 child_pid = evsel_list->workload.pid;
648 perf_evlist__set_leader(evsel_list);
650 evlist__for_each(evsel_list, counter) {
651 if (create_perf_stat_counter(counter) < 0) {
653 * PPC returns ENXIO for HW counters until 2.6.37
654 * (behavior changed with commit b0a873e).
656 if (errno == EINVAL || errno == ENOSYS ||
657 errno == ENOENT || errno == EOPNOTSUPP ||
660 ui__warning("%s event is not supported by the kernel.\n",
661 perf_evsel__name(counter));
662 counter->supported = false;
666 perf_evsel__open_strerror(counter, &target,
667 errno, msg, sizeof(msg));
668 ui__error("%s\n", msg);
671 kill(child_pid, SIGTERM);
675 counter->supported = true;
677 l = strlen(counter->unit);
682 if (perf_evlist__apply_filters(evsel_list)) {
683 error("failed to set filter with %d (%s)\n", errno,
684 strerror_r(errno, msg, sizeof(msg)));
689 * Enable counters and exec the command:
692 clock_gettime(CLOCK_MONOTONIC, &ref_time);
695 perf_evlist__start_workload(evsel_list);
696 handle_initial_delay();
699 while (!waitpid(child_pid, &status, WNOHANG)) {
700 nanosleep(&ts, NULL);
706 if (workload_exec_errno) {
707 const char *emsg = strerror_r(workload_exec_errno, msg, sizeof(msg));
708 pr_err("Workload failed: %s\n", emsg);
712 if (WIFSIGNALED(status))
713 psignal(WTERMSIG(status), argv[0]);
715 handle_initial_delay();
717 nanosleep(&ts, NULL);
725 update_stats(&walltime_nsecs_stats, t1 - t0);
727 if (aggr_mode == AGGR_GLOBAL) {
728 evlist__for_each(evsel_list, counter) {
729 read_counter_aggr(counter);
730 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
731 thread_map__nr(evsel_list->threads));
734 evlist__for_each(evsel_list, counter) {
735 read_counter(counter);
736 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
740 return WEXITSTATUS(status);
743 static int run_perf_stat(int argc, const char **argv)
748 ret = system(pre_cmd);
756 ret = __run_perf_stat(argc, argv);
761 ret = system(post_cmd);
769 static void print_noise_pct(double total, double avg)
771 double pct = rel_stddev_stats(total, avg);
774 fprintf(output, "%s%.2f%%", csv_sep, pct);
776 fprintf(output, " ( +-%6.2f%% )", pct);
779 static void print_noise(struct perf_evsel *evsel, double avg)
781 struct perf_stat *ps;
787 print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
790 static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
794 fprintf(output, "S%d-C%*d%s%*d%s",
795 cpu_map__id_to_socket(id),
797 cpu_map__id_to_cpu(id),
804 fprintf(output, "S%*d%s%*d%s",
813 fprintf(output, "CPU%*d%s",
815 perf_evsel__cpus(evsel)->map[id], csv_sep);
823 static void nsec_printout(int id, int nr, struct perf_evsel *evsel, double avg)
825 double msecs = avg / 1e6;
826 const char *fmt_v, *fmt_n;
829 fmt_v = csv_output ? "%.6f%s" : "%18.6f%s";
830 fmt_n = csv_output ? "%s" : "%-25s";
832 aggr_printout(evsel, id, nr);
834 scnprintf(name, sizeof(name), "%s%s",
835 perf_evsel__name(evsel), csv_output ? "" : " (msec)");
837 fprintf(output, fmt_v, msecs, csv_sep);
840 fprintf(output, "%s%s", evsel->unit, csv_sep);
842 fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep);
844 fprintf(output, fmt_n, name);
847 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
849 if (csv_output || interval)
852 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
853 fprintf(output, " # %8.3f CPUs utilized ",
854 avg / avg_stats(&walltime_nsecs_stats));
856 fprintf(output, " ");
859 /* used for get_ratio_color() */
861 GRC_STALLED_CYCLES_FE,
862 GRC_STALLED_CYCLES_BE,
867 static const char *get_ratio_color(enum grc_type type, double ratio)
869 static const double grc_table[GRC_MAX_NR][3] = {
870 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
871 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
872 [GRC_CACHE_MISSES] = { 20.0, 10.0, 5.0 },
874 const char *color = PERF_COLOR_NORMAL;
876 if (ratio > grc_table[type][0])
877 color = PERF_COLOR_RED;
878 else if (ratio > grc_table[type][1])
879 color = PERF_COLOR_MAGENTA;
880 else if (ratio > grc_table[type][2])
881 color = PERF_COLOR_YELLOW;
886 static void print_stalled_cycles_frontend(int cpu,
887 struct perf_evsel *evsel
888 __maybe_unused, double avg)
890 double total, ratio = 0.0;
893 total = avg_stats(&runtime_cycles_stats[cpu]);
896 ratio = avg / total * 100.0;
898 color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
900 fprintf(output, " # ");
901 color_fprintf(output, color, "%6.2f%%", ratio);
902 fprintf(output, " frontend cycles idle ");
905 static void print_stalled_cycles_backend(int cpu,
906 struct perf_evsel *evsel
907 __maybe_unused, double avg)
909 double total, ratio = 0.0;
912 total = avg_stats(&runtime_cycles_stats[cpu]);
915 ratio = avg / total * 100.0;
917 color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
919 fprintf(output, " # ");
920 color_fprintf(output, color, "%6.2f%%", ratio);
921 fprintf(output, " backend cycles idle ");
924 static void print_branch_misses(int cpu,
925 struct perf_evsel *evsel __maybe_unused,
928 double total, ratio = 0.0;
931 total = avg_stats(&runtime_branches_stats[cpu]);
934 ratio = avg / total * 100.0;
936 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
938 fprintf(output, " # ");
939 color_fprintf(output, color, "%6.2f%%", ratio);
940 fprintf(output, " of all branches ");
943 static void print_l1_dcache_misses(int cpu,
944 struct perf_evsel *evsel __maybe_unused,
947 double total, ratio = 0.0;
950 total = avg_stats(&runtime_l1_dcache_stats[cpu]);
953 ratio = avg / total * 100.0;
955 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
957 fprintf(output, " # ");
958 color_fprintf(output, color, "%6.2f%%", ratio);
959 fprintf(output, " of all L1-dcache hits ");
962 static void print_l1_icache_misses(int cpu,
963 struct perf_evsel *evsel __maybe_unused,
966 double total, ratio = 0.0;
969 total = avg_stats(&runtime_l1_icache_stats[cpu]);
972 ratio = avg / total * 100.0;
974 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
976 fprintf(output, " # ");
977 color_fprintf(output, color, "%6.2f%%", ratio);
978 fprintf(output, " of all L1-icache hits ");
981 static void print_dtlb_cache_misses(int cpu,
982 struct perf_evsel *evsel __maybe_unused,
985 double total, ratio = 0.0;
988 total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
991 ratio = avg / total * 100.0;
993 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
995 fprintf(output, " # ");
996 color_fprintf(output, color, "%6.2f%%", ratio);
997 fprintf(output, " of all dTLB cache hits ");
1000 static void print_itlb_cache_misses(int cpu,
1001 struct perf_evsel *evsel __maybe_unused,
1004 double total, ratio = 0.0;
1007 total = avg_stats(&runtime_itlb_cache_stats[cpu]);
1010 ratio = avg / total * 100.0;
1012 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
1014 fprintf(output, " # ");
1015 color_fprintf(output, color, "%6.2f%%", ratio);
1016 fprintf(output, " of all iTLB cache hits ");
1019 static void print_ll_cache_misses(int cpu,
1020 struct perf_evsel *evsel __maybe_unused,
1023 double total, ratio = 0.0;
1026 total = avg_stats(&runtime_ll_cache_stats[cpu]);
1029 ratio = avg / total * 100.0;
1031 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
1033 fprintf(output, " # ");
1034 color_fprintf(output, color, "%6.2f%%", ratio);
1035 fprintf(output, " of all LL-cache hits ");
1038 static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
1040 double total, ratio = 0.0, total2;
1041 double sc = evsel->scale;
1043 int cpu = cpu_map__id_to_cpu(id);
1046 fmt = sc != 1.0 ? "%.2f%s" : "%.0f%s";
1049 fmt = sc != 1.0 ? "%'18.2f%s" : "%'18.0f%s";
1051 fmt = sc != 1.0 ? "%18.2f%s" : "%18.0f%s";
1054 aggr_printout(evsel, id, nr);
1056 if (aggr_mode == AGGR_GLOBAL)
1059 fprintf(output, fmt, avg, csv_sep);
1062 fprintf(output, "%-*s%s",
1063 csv_output ? 0 : unit_width,
1064 evsel->unit, csv_sep);
1066 fprintf(output, "%-*s", csv_output ? 0 : 25, perf_evsel__name(evsel));
1069 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
1071 if (csv_output || interval)
1074 if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
1075 total = avg_stats(&runtime_cycles_stats[cpu]);
1077 ratio = avg / total;
1078 fprintf(output, " # %5.2f insns per cycle ", ratio);
1080 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
1081 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
1084 ratio = total / avg;
1085 fprintf(output, "\n");
1086 if (aggr_mode == AGGR_NONE)
1087 fprintf(output, " ");
1088 fprintf(output, " # %5.2f stalled cycles per insn", ratio);
1091 } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
1092 runtime_branches_stats[cpu].n != 0) {
1093 print_branch_misses(cpu, evsel, avg);
1095 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1096 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1D |
1097 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1098 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1099 runtime_l1_dcache_stats[cpu].n != 0) {
1100 print_l1_dcache_misses(cpu, evsel, avg);
1102 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1103 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1I |
1104 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1105 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1106 runtime_l1_icache_stats[cpu].n != 0) {
1107 print_l1_icache_misses(cpu, evsel, avg);
1109 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1110 evsel->attr.config == ( PERF_COUNT_HW_CACHE_DTLB |
1111 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1112 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1113 runtime_dtlb_cache_stats[cpu].n != 0) {
1114 print_dtlb_cache_misses(cpu, evsel, avg);
1116 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1117 evsel->attr.config == ( PERF_COUNT_HW_CACHE_ITLB |
1118 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1119 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1120 runtime_itlb_cache_stats[cpu].n != 0) {
1121 print_itlb_cache_misses(cpu, evsel, avg);
1123 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1124 evsel->attr.config == ( PERF_COUNT_HW_CACHE_LL |
1125 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1126 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1127 runtime_ll_cache_stats[cpu].n != 0) {
1128 print_ll_cache_misses(cpu, evsel, avg);
1129 } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
1130 runtime_cacherefs_stats[cpu].n != 0) {
1131 total = avg_stats(&runtime_cacherefs_stats[cpu]);
1134 ratio = avg * 100 / total;
1136 fprintf(output, " # %8.3f %% of all cache refs ", ratio);
1138 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
1139 print_stalled_cycles_frontend(cpu, evsel, avg);
1140 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
1141 print_stalled_cycles_backend(cpu, evsel, avg);
1142 } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
1143 total = avg_stats(&runtime_nsecs_stats[cpu]);
1146 ratio = avg / total;
1147 fprintf(output, " # %8.3f GHz ", ratio);
1149 } else if (transaction_run &&
1150 perf_evsel__cmp(evsel, nth_evsel(T_CYCLES_IN_TX))) {
1151 total = avg_stats(&runtime_cycles_stats[cpu]);
1154 " # %5.2f%% transactional cycles ",
1155 100.0 * (avg / total));
1156 } else if (transaction_run &&
1157 perf_evsel__cmp(evsel, nth_evsel(T_CYCLES_IN_TX_CP))) {
1158 total = avg_stats(&runtime_cycles_stats[cpu]);
1159 total2 = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
1164 " # %5.2f%% aborted cycles ",
1165 100.0 * ((total2-avg) / total));
1166 } else if (transaction_run &&
1167 perf_evsel__cmp(evsel, nth_evsel(T_TRANSACTION_START)) &&
1169 runtime_cycles_in_tx_stats[cpu].n != 0) {
1170 total = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
1173 ratio = total / avg;
1175 fprintf(output, " # %8.0f cycles / transaction ", ratio);
1176 } else if (transaction_run &&
1177 perf_evsel__cmp(evsel, nth_evsel(T_ELISION_START)) &&
1179 runtime_cycles_in_tx_stats[cpu].n != 0) {
1180 total = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
1183 ratio = total / avg;
1185 fprintf(output, " # %8.0f cycles / elision ", ratio);
1186 } else if (runtime_nsecs_stats[cpu].n != 0) {
1189 total = avg_stats(&runtime_nsecs_stats[cpu]);
1192 ratio = 1000.0 * avg / total;
1193 if (ratio < 0.001) {
1198 fprintf(output, " # %8.3f %c/sec ", ratio, unit);
1200 fprintf(output, " ");
1204 static void print_aggr(char *prefix)
1206 struct perf_evsel *counter;
1207 int cpu, cpu2, s, s2, id, nr;
1211 if (!(aggr_map || aggr_get_id))
1214 for (s = 0; s < aggr_map->nr; s++) {
1215 id = aggr_map->map[s];
1216 evlist__for_each(evsel_list, counter) {
1217 val = ena = run = 0;
1219 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1220 cpu2 = perf_evsel__cpus(counter)->map[cpu];
1221 s2 = aggr_get_id(evsel_list->cpus, cpu2);
1224 val += counter->counts->cpu[cpu].val;
1225 ena += counter->counts->cpu[cpu].ena;
1226 run += counter->counts->cpu[cpu].run;
1230 fprintf(output, "%s", prefix);
1232 if (run == 0 || ena == 0) {
1233 aggr_printout(counter, id, nr);
1235 fprintf(output, "%*s%s",
1236 csv_output ? 0 : 18,
1237 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1240 fprintf(output, "%-*s%s",
1241 csv_output ? 0 : unit_width,
1242 counter->unit, csv_sep);
1244 fprintf(output, "%*s",
1245 csv_output ? 0 : -25,
1246 perf_evsel__name(counter));
1249 fprintf(output, "%s%s",
1250 csv_sep, counter->cgrp->name);
1252 fputc('\n', output);
1255 uval = val * counter->scale;
1257 if (nsec_counter(counter))
1258 nsec_printout(id, nr, counter, uval);
1260 abs_printout(id, nr, counter, uval);
1263 print_noise(counter, 1.0);
1266 fprintf(output, " (%.2f%%)",
1269 fputc('\n', output);
1275 * Print out the results of a single counter:
1276 * aggregated counts in system-wide mode
1278 static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
1280 struct perf_stat *ps = counter->priv;
1281 double avg = avg_stats(&ps->res_stats[0]);
1282 int scaled = counter->counts->scaled;
1286 fprintf(output, "%s", prefix);
1289 fprintf(output, "%*s%s",
1290 csv_output ? 0 : 18,
1291 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1293 fprintf(output, "%-*s%s",
1294 csv_output ? 0 : unit_width,
1295 counter->unit, csv_sep);
1296 fprintf(output, "%*s",
1297 csv_output ? 0 : -25,
1298 perf_evsel__name(counter));
1301 fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
1303 fputc('\n', output);
1307 uval = avg * counter->scale;
1309 if (nsec_counter(counter))
1310 nsec_printout(-1, 0, counter, uval);
1312 abs_printout(-1, 0, counter, uval);
1314 print_noise(counter, avg);
1317 fputc('\n', output);
1322 double avg_enabled, avg_running;
1324 avg_enabled = avg_stats(&ps->res_stats[1]);
1325 avg_running = avg_stats(&ps->res_stats[2]);
1327 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
1329 fprintf(output, "\n");
1333 * Print out the results of a single counter:
1334 * does not use aggregated count in system-wide
1336 static void print_counter(struct perf_evsel *counter, char *prefix)
1342 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1343 val = counter->counts->cpu[cpu].val;
1344 ena = counter->counts->cpu[cpu].ena;
1345 run = counter->counts->cpu[cpu].run;
1348 fprintf(output, "%s", prefix);
1350 if (run == 0 || ena == 0) {
1351 fprintf(output, "CPU%*d%s%*s%s",
1352 csv_output ? 0 : -4,
1353 perf_evsel__cpus(counter)->map[cpu], csv_sep,
1354 csv_output ? 0 : 18,
1355 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1358 fprintf(output, "%-*s%s",
1359 csv_output ? 0 : unit_width,
1360 counter->unit, csv_sep);
1362 fprintf(output, "%*s",
1363 csv_output ? 0 : -25,
1364 perf_evsel__name(counter));
1367 fprintf(output, "%s%s",
1368 csv_sep, counter->cgrp->name);
1370 fputc('\n', output);
1374 uval = val * counter->scale;
1376 if (nsec_counter(counter))
1377 nsec_printout(cpu, 0, counter, uval);
1379 abs_printout(cpu, 0, counter, uval);
1382 print_noise(counter, 1.0);
1385 fprintf(output, " (%.2f%%)",
1388 fputc('\n', output);
1392 static void print_stat(int argc, const char **argv)
1394 struct perf_evsel *counter;
1400 fprintf(output, "\n");
1401 fprintf(output, " Performance counter stats for ");
1402 if (target.system_wide)
1403 fprintf(output, "\'system wide");
1404 else if (target.cpu_list)
1405 fprintf(output, "\'CPU(s) %s", target.cpu_list);
1406 else if (!target__has_task(&target)) {
1407 fprintf(output, "\'%s", argv[0]);
1408 for (i = 1; i < argc; i++)
1409 fprintf(output, " %s", argv[i]);
1410 } else if (target.pid)
1411 fprintf(output, "process id \'%s", target.pid);
1413 fprintf(output, "thread id \'%s", target.tid);
1415 fprintf(output, "\'");
1417 fprintf(output, " (%d runs)", run_count);
1418 fprintf(output, ":\n\n");
1421 switch (aggr_mode) {
1427 evlist__for_each(evsel_list, counter)
1428 print_counter_aggr(counter, NULL);
1431 evlist__for_each(evsel_list, counter)
1432 print_counter(counter, NULL);
1440 fprintf(output, "\n");
1441 fprintf(output, " %17.9f seconds time elapsed",
1442 avg_stats(&walltime_nsecs_stats)/1e9);
1443 if (run_count > 1) {
1444 fprintf(output, " ");
1445 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1446 avg_stats(&walltime_nsecs_stats));
1448 fprintf(output, "\n\n");
1452 static volatile int signr = -1;
1454 static void skip_signal(int signo)
1456 if ((child_pid == -1) || interval)
1461 * render child_pid harmless
1462 * won't send SIGTERM to a random
1463 * process in case of race condition
1464 * and fast PID recycling
1469 static void sig_atexit(void)
1474 * avoid race condition with SIGCHLD handler
1475 * in skip_signal() which is modifying child_pid
1476 * goal is to avoid send SIGTERM to a random
1480 sigaddset(&set, SIGCHLD);
1481 sigprocmask(SIG_BLOCK, &set, &oset);
1483 if (child_pid != -1)
1484 kill(child_pid, SIGTERM);
1486 sigprocmask(SIG_SETMASK, &oset, NULL);
1491 signal(signr, SIG_DFL);
1492 kill(getpid(), signr);
1495 static int stat__set_big_num(const struct option *opt __maybe_unused,
1496 const char *s __maybe_unused, int unset)
1498 big_num_opt = unset ? 0 : 1;
1502 static int perf_stat_init_aggr_mode(void)
1504 switch (aggr_mode) {
1506 if (cpu_map__build_socket_map(evsel_list->cpus, &aggr_map)) {
1507 perror("cannot build socket map");
1510 aggr_get_id = cpu_map__get_socket;
1513 if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
1514 perror("cannot build core map");
1517 aggr_get_id = cpu_map__get_core;
1527 static int setup_events(const char * const *attrs, unsigned len)
1531 for (i = 0; i < len; i++) {
1532 if (parse_events(evsel_list, attrs[i]))
1539 * Add default attributes, if there were no attributes specified or
1540 * if -d/--detailed, -d -d or -d -d -d is used:
1542 static int add_default_attributes(void)
1544 struct perf_event_attr default_attrs[] = {
1546 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
1547 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
1548 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
1549 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
1551 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
1552 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1553 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
1554 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
1555 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
1556 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
1561 * Detailed stats (-d), covering the L1 and last level data caches:
1563 struct perf_event_attr detailed_attrs[] = {
1565 { .type = PERF_TYPE_HW_CACHE,
1567 PERF_COUNT_HW_CACHE_L1D << 0 |
1568 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1569 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1571 { .type = PERF_TYPE_HW_CACHE,
1573 PERF_COUNT_HW_CACHE_L1D << 0 |
1574 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1575 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1577 { .type = PERF_TYPE_HW_CACHE,
1579 PERF_COUNT_HW_CACHE_LL << 0 |
1580 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1581 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1583 { .type = PERF_TYPE_HW_CACHE,
1585 PERF_COUNT_HW_CACHE_LL << 0 |
1586 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1587 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1591 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1593 struct perf_event_attr very_detailed_attrs[] = {
1595 { .type = PERF_TYPE_HW_CACHE,
1597 PERF_COUNT_HW_CACHE_L1I << 0 |
1598 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1599 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1601 { .type = PERF_TYPE_HW_CACHE,
1603 PERF_COUNT_HW_CACHE_L1I << 0 |
1604 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1605 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1607 { .type = PERF_TYPE_HW_CACHE,
1609 PERF_COUNT_HW_CACHE_DTLB << 0 |
1610 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1611 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1613 { .type = PERF_TYPE_HW_CACHE,
1615 PERF_COUNT_HW_CACHE_DTLB << 0 |
1616 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1617 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1619 { .type = PERF_TYPE_HW_CACHE,
1621 PERF_COUNT_HW_CACHE_ITLB << 0 |
1622 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1623 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1625 { .type = PERF_TYPE_HW_CACHE,
1627 PERF_COUNT_HW_CACHE_ITLB << 0 |
1628 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1629 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1634 * Very, very detailed stats (-d -d -d), adding prefetch events:
1636 struct perf_event_attr very_very_detailed_attrs[] = {
1638 { .type = PERF_TYPE_HW_CACHE,
1640 PERF_COUNT_HW_CACHE_L1D << 0 |
1641 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1642 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1644 { .type = PERF_TYPE_HW_CACHE,
1646 PERF_COUNT_HW_CACHE_L1D << 0 |
1647 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1648 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1651 /* Set attrs if no event is selected and !null_run: */
1655 if (transaction_run) {
1657 if (pmu_have_event("cpu", "cycles-ct") &&
1658 pmu_have_event("cpu", "el-start"))
1659 err = setup_events(transaction_attrs,
1660 ARRAY_SIZE(transaction_attrs));
1662 err = setup_events(transaction_limited_attrs,
1663 ARRAY_SIZE(transaction_limited_attrs));
1665 fprintf(stderr, "Cannot set up transaction events\n");
1671 if (!evsel_list->nr_entries) {
1672 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1676 /* Detailed events get appended to the event list: */
1678 if (detailed_run < 1)
1681 /* Append detailed run extra attributes: */
1682 if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1685 if (detailed_run < 2)
1688 /* Append very detailed run extra attributes: */
1689 if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1692 if (detailed_run < 3)
1695 /* Append very, very detailed run extra attributes: */
1696 return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1699 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
1701 bool append_file = false;
1703 const char *output_name = NULL;
1704 const struct option options[] = {
1705 OPT_BOOLEAN('T', "transaction", &transaction_run,
1706 "hardware transaction statistics"),
1707 OPT_CALLBACK('e', "event", &evsel_list, "event",
1708 "event selector. use 'perf list' to list available events",
1709 parse_events_option),
1710 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1711 "event filter", parse_filter),
1712 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1713 "child tasks do not inherit counters"),
1714 OPT_STRING('p', "pid", &target.pid, "pid",
1715 "stat events on existing process id"),
1716 OPT_STRING('t', "tid", &target.tid, "tid",
1717 "stat events on existing thread id"),
1718 OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1719 "system-wide collection from all CPUs"),
1720 OPT_BOOLEAN('g', "group", &group,
1721 "put the counters into a counter group"),
1722 OPT_BOOLEAN('c', "scale", &scale, "scale/normalize counters"),
1723 OPT_INCR('v', "verbose", &verbose,
1724 "be more verbose (show counter open errors, etc)"),
1725 OPT_INTEGER('r', "repeat", &run_count,
1726 "repeat command and print average + stddev (max: 100, forever: 0)"),
1727 OPT_BOOLEAN('n', "null", &null_run,
1728 "null run - dont start any counters"),
1729 OPT_INCR('d', "detailed", &detailed_run,
1730 "detailed run - start a lot of events"),
1731 OPT_BOOLEAN('S', "sync", &sync_run,
1732 "call sync() before starting a run"),
1733 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1734 "print large numbers with thousands\' separators",
1736 OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1737 "list of cpus to monitor in system-wide"),
1738 OPT_SET_UINT('A', "no-aggr", &aggr_mode,
1739 "disable CPU count aggregation", AGGR_NONE),
1740 OPT_STRING('x', "field-separator", &csv_sep, "separator",
1741 "print counts with custom separator"),
1742 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1743 "monitor event in cgroup name only", parse_cgroups),
1744 OPT_STRING('o', "output", &output_name, "file", "output file name"),
1745 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1746 OPT_INTEGER(0, "log-fd", &output_fd,
1747 "log output to fd, instead of stderr"),
1748 OPT_STRING(0, "pre", &pre_cmd, "command",
1749 "command to run prior to the measured command"),
1750 OPT_STRING(0, "post", &post_cmd, "command",
1751 "command to run after to the measured command"),
1752 OPT_UINTEGER('I', "interval-print", &interval,
1753 "print counts at regular interval in ms (>= 100)"),
1754 OPT_SET_UINT(0, "per-socket", &aggr_mode,
1755 "aggregate counts per processor socket", AGGR_SOCKET),
1756 OPT_SET_UINT(0, "per-core", &aggr_mode,
1757 "aggregate counts per physical processor core", AGGR_CORE),
1758 OPT_UINTEGER('D', "delay", &initial_delay,
1759 "ms to wait before starting measurement after program start"),
1762 const char * const stat_usage[] = {
1763 "perf stat [<options>] [<command>]",
1766 int status = -EINVAL, run_idx;
1769 setlocale(LC_ALL, "");
1771 evsel_list = perf_evlist__new();
1772 if (evsel_list == NULL)
1775 argc = parse_options(argc, argv, options, stat_usage,
1776 PARSE_OPT_STOP_AT_NON_OPTION);
1779 if (output_name && strcmp(output_name, "-"))
1782 if (output_name && output_fd) {
1783 fprintf(stderr, "cannot use both --output and --log-fd\n");
1784 parse_options_usage(stat_usage, options, "o", 1);
1785 parse_options_usage(NULL, options, "log-fd", 0);
1789 if (output_fd < 0) {
1790 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1791 parse_options_usage(stat_usage, options, "log-fd", 0);
1797 mode = append_file ? "a" : "w";
1799 output = fopen(output_name, mode);
1801 perror("failed to create output file");
1804 clock_gettime(CLOCK_REALTIME, &tm);
1805 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1806 } else if (output_fd > 0) {
1807 mode = append_file ? "a" : "w";
1808 output = fdopen(output_fd, mode);
1810 perror("Failed opening logfd");
1817 if (!strcmp(csv_sep, "\\t"))
1820 csv_sep = DEFAULT_SEPARATOR;
1823 * let the spreadsheet do the pretty-printing
1826 /* User explicitly passed -B? */
1827 if (big_num_opt == 1) {
1828 fprintf(stderr, "-B option not supported with -x\n");
1829 parse_options_usage(stat_usage, options, "B", 1);
1830 parse_options_usage(NULL, options, "x", 1);
1832 } else /* Nope, so disable big number formatting */
1834 } else if (big_num_opt == 0) /* User passed --no-big-num */
1837 if (!argc && target__none(&target))
1838 usage_with_options(stat_usage, options);
1840 if (run_count < 0) {
1841 pr_err("Run count must be a positive number\n");
1842 parse_options_usage(stat_usage, options, "r", 1);
1844 } else if (run_count == 0) {
1849 /* no_aggr, cgroup are for system-wide only */
1850 if ((aggr_mode != AGGR_GLOBAL || nr_cgroups) &&
1851 !target__has_cpu(&target)) {
1852 fprintf(stderr, "both cgroup and no-aggregation "
1853 "modes only available in system-wide mode\n");
1855 parse_options_usage(stat_usage, options, "G", 1);
1856 parse_options_usage(NULL, options, "A", 1);
1857 parse_options_usage(NULL, options, "a", 1);
1861 if (add_default_attributes())
1864 target__validate(&target);
1866 if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1867 if (target__has_task(&target)) {
1868 pr_err("Problems finding threads of monitor\n");
1869 parse_options_usage(stat_usage, options, "p", 1);
1870 parse_options_usage(NULL, options, "t", 1);
1871 } else if (target__has_cpu(&target)) {
1872 perror("failed to parse CPUs map");
1873 parse_options_usage(stat_usage, options, "C", 1);
1874 parse_options_usage(NULL, options, "a", 1);
1878 if (interval && interval < 100) {
1879 pr_err("print interval must be >= 100ms\n");
1880 parse_options_usage(stat_usage, options, "I", 1);
1884 if (perf_evlist__alloc_stats(evsel_list, interval))
1887 if (perf_stat_init_aggr_mode())
1891 * We dont want to block the signals - that would cause
1892 * child tasks to inherit that and Ctrl-C would not work.
1893 * What we want is for Ctrl-C to work in the exec()-ed
1894 * task, but being ignored by perf stat itself:
1898 signal(SIGINT, skip_signal);
1899 signal(SIGCHLD, skip_signal);
1900 signal(SIGALRM, skip_signal);
1901 signal(SIGABRT, skip_signal);
1904 for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
1905 if (run_count != 1 && verbose)
1906 fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1909 status = run_perf_stat(argc, argv);
1910 if (forever && status != -1) {
1911 print_stat(argc, argv);
1912 perf_stat__reset_stats(evsel_list);
1916 if (!forever && status != -1 && !interval)
1917 print_stat(argc, argv);
1919 perf_evlist__free_stats(evsel_list);
1921 perf_evlist__delete(evsel_list);