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/util.h"
47 #include "util/parse-options.h"
48 #include "util/parse-events.h"
49 #include "util/event.h"
50 #include "util/evlist.h"
51 #include "util/evsel.h"
52 #include "util/debug.h"
53 #include "util/color.h"
54 #include "util/header.h"
55 #include "util/cpumap.h"
56 #include "util/thread.h"
57 #include "util/thread_map.h"
59 #include <sys/prctl.h>
63 #define DEFAULT_SEPARATOR " "
64 #define CNTR_NOT_SUPPORTED "<not supported>"
65 #define CNTR_NOT_COUNTED "<not counted>"
67 static struct perf_event_attr default_attrs[] = {
69 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
70 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
71 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
72 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
74 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
75 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
76 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
77 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
78 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
79 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
84 * Detailed stats (-d), covering the L1 and last level data caches:
86 static struct perf_event_attr detailed_attrs[] = {
88 { .type = PERF_TYPE_HW_CACHE,
90 PERF_COUNT_HW_CACHE_L1D << 0 |
91 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
92 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
94 { .type = PERF_TYPE_HW_CACHE,
96 PERF_COUNT_HW_CACHE_L1D << 0 |
97 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
98 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
100 { .type = PERF_TYPE_HW_CACHE,
102 PERF_COUNT_HW_CACHE_LL << 0 |
103 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
104 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
106 { .type = PERF_TYPE_HW_CACHE,
108 PERF_COUNT_HW_CACHE_LL << 0 |
109 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
110 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
114 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
116 static struct perf_event_attr very_detailed_attrs[] = {
118 { .type = PERF_TYPE_HW_CACHE,
120 PERF_COUNT_HW_CACHE_L1I << 0 |
121 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
122 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
124 { .type = PERF_TYPE_HW_CACHE,
126 PERF_COUNT_HW_CACHE_L1I << 0 |
127 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
128 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
130 { .type = PERF_TYPE_HW_CACHE,
132 PERF_COUNT_HW_CACHE_DTLB << 0 |
133 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
134 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
136 { .type = PERF_TYPE_HW_CACHE,
138 PERF_COUNT_HW_CACHE_DTLB << 0 |
139 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
140 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
142 { .type = PERF_TYPE_HW_CACHE,
144 PERF_COUNT_HW_CACHE_ITLB << 0 |
145 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
146 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
148 { .type = PERF_TYPE_HW_CACHE,
150 PERF_COUNT_HW_CACHE_ITLB << 0 |
151 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
152 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
157 * Very, very detailed stats (-d -d -d), adding prefetch events:
159 static struct perf_event_attr very_very_detailed_attrs[] = {
161 { .type = PERF_TYPE_HW_CACHE,
163 PERF_COUNT_HW_CACHE_L1D << 0 |
164 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
165 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
167 { .type = PERF_TYPE_HW_CACHE,
169 PERF_COUNT_HW_CACHE_L1D << 0 |
170 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
171 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
176 static struct perf_evlist *evsel_list;
178 static struct perf_target target = {
182 static int run_idx = 0;
183 static int run_count = 1;
184 static bool no_inherit = false;
185 static bool scale = true;
186 static bool no_aggr = false;
187 static pid_t child_pid = -1;
188 static bool null_run = false;
189 static int detailed_run = 0;
190 static bool sync_run = false;
191 static bool big_num = true;
192 static int big_num_opt = -1;
193 static const char *csv_sep = NULL;
194 static bool csv_output = false;
195 static bool group = false;
196 static const char *output_name = NULL;
197 static FILE *output = NULL;
198 static int output_fd;
200 static volatile int done = 0;
208 struct stats res_stats[3];
211 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
213 evsel->priv = zalloc(sizeof(struct perf_stat));
214 return evsel->priv == NULL ? -ENOMEM : 0;
217 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
223 static void update_stats(struct stats *stats, u64 val)
228 delta = val - stats->mean;
229 stats->mean += delta / stats->n;
230 stats->M2 += delta*(val - stats->mean);
233 static double avg_stats(struct stats *stats)
239 * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
241 * (\Sum n_i^2) - ((\Sum n_i)^2)/n
242 * s^2 = -------------------------------
245 * http://en.wikipedia.org/wiki/Stddev
247 * The std dev of the mean is related to the std dev by:
254 static double stddev_stats(struct stats *stats)
256 double variance, variance_mean;
261 variance = stats->M2 / (stats->n - 1);
262 variance_mean = variance / stats->n;
264 return sqrt(variance_mean);
267 static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
268 static struct stats runtime_cycles_stats[MAX_NR_CPUS];
269 static struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
270 static struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
271 static struct stats runtime_branches_stats[MAX_NR_CPUS];
272 static struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
273 static struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
274 static struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
275 static struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
276 static struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
277 static struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
278 static struct stats walltime_nsecs_stats;
280 static int create_perf_stat_counter(struct perf_evsel *evsel,
281 struct perf_evsel *first)
283 struct perf_event_attr *attr = &evsel->attr;
284 bool exclude_guest_missing = false;
288 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
289 PERF_FORMAT_TOTAL_TIME_RUNNING;
291 attr->inherit = !no_inherit;
294 if (exclude_guest_missing)
295 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
297 if (perf_target__has_cpu(&target)) {
298 ret = perf_evsel__open_per_cpu(evsel, evsel_list->cpus);
304 if (!perf_target__has_task(&target) && (!group || evsel == first)) {
306 attr->enable_on_exec = 1;
309 ret = perf_evsel__open_per_thread(evsel, evsel_list->threads);
314 if (ret && errno == EINVAL) {
315 if (!exclude_guest_missing &&
316 (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
317 pr_debug("Old kernel, cannot exclude "
318 "guest or host samples.\n");
319 exclude_guest_missing = true;
327 * Does the counter have nsecs as a unit?
329 static inline int nsec_counter(struct perf_evsel *evsel)
331 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
332 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
339 * Update various tracking values we maintain to print
340 * more semantic information such as miss/hit ratios,
341 * instruction rates, etc:
343 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
345 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
346 update_stats(&runtime_nsecs_stats[0], count[0]);
347 else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
348 update_stats(&runtime_cycles_stats[0], count[0]);
349 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
350 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
351 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
352 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
353 else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
354 update_stats(&runtime_branches_stats[0], count[0]);
355 else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
356 update_stats(&runtime_cacherefs_stats[0], count[0]);
357 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
358 update_stats(&runtime_l1_dcache_stats[0], count[0]);
359 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
360 update_stats(&runtime_l1_icache_stats[0], count[0]);
361 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
362 update_stats(&runtime_ll_cache_stats[0], count[0]);
363 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
364 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
365 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
366 update_stats(&runtime_itlb_cache_stats[0], count[0]);
370 * Read out the results of a single counter:
371 * aggregate counts across CPUs in system-wide mode
373 static int read_counter_aggr(struct perf_evsel *counter)
375 struct perf_stat *ps = counter->priv;
376 u64 *count = counter->counts->aggr.values;
379 if (__perf_evsel__read(counter, evsel_list->cpus->nr,
380 evsel_list->threads->nr, scale) < 0)
383 for (i = 0; i < 3; i++)
384 update_stats(&ps->res_stats[i], count[i]);
387 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
388 perf_evsel__name(counter), count[0], count[1], count[2]);
392 * Save the full runtime - to allow normalization during printout:
394 update_shadow_stats(counter, count);
400 * Read out the results of a single counter:
401 * do not aggregate counts across CPUs in system-wide mode
403 static int read_counter(struct perf_evsel *counter)
408 for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
409 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
412 count = counter->counts->cpu[cpu].values;
414 update_shadow_stats(counter, count);
420 static int run_perf_stat(int argc __used, const char **argv)
422 unsigned long long t0, t1;
423 struct perf_evsel *counter, *first;
425 int child_ready_pipe[2], go_pipe[2];
426 const bool forks = (argc > 0);
429 if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
430 perror("failed to create pipes");
435 if ((child_pid = fork()) < 0)
436 perror("failed to fork");
439 close(child_ready_pipe[0]);
441 fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
444 * Do a dummy execvp to get the PLT entry resolved,
445 * so we avoid the resolver overhead on the real
448 execvp("", (char **)argv);
451 * Tell the parent we're ready to go
453 close(child_ready_pipe[1]);
456 * Wait until the parent tells us to go.
458 if (read(go_pipe[0], &buf, 1) == -1)
459 perror("unable to read pipe");
461 execvp(argv[0], (char **)argv);
467 if (perf_target__none(&target))
468 evsel_list->threads->map[0] = child_pid;
471 * Wait for the child to be ready to exec.
473 close(child_ready_pipe[1]);
475 if (read(child_ready_pipe[0], &buf, 1) == -1)
476 perror("unable to read pipe");
477 close(child_ready_pipe[0]);
481 perf_evlist__set_leader(evsel_list);
483 first = perf_evlist__first(evsel_list);
485 list_for_each_entry(counter, &evsel_list->entries, node) {
486 if (create_perf_stat_counter(counter, first) < 0) {
488 * PPC returns ENXIO for HW counters until 2.6.37
489 * (behavior changed with commit b0a873e).
491 if (errno == EINVAL || errno == ENOSYS ||
492 errno == ENOENT || errno == EOPNOTSUPP ||
495 ui__warning("%s event is not supported by the kernel.\n",
496 perf_evsel__name(counter));
497 counter->supported = false;
501 if (errno == EPERM || errno == EACCES) {
502 error("You may not have permission to collect %sstats.\n"
503 "\t Consider tweaking"
504 " /proc/sys/kernel/perf_event_paranoid or running as root.",
505 target.system_wide ? "system-wide " : "");
507 error("open_counter returned with %d (%s). "
508 "/bin/dmesg may provide additional information.\n",
509 errno, strerror(errno));
512 kill(child_pid, SIGTERM);
514 pr_err("Not all events could be opened.\n");
517 counter->supported = true;
520 if (perf_evlist__set_filters(evsel_list)) {
521 error("failed to set filter with %d (%s)\n", errno,
527 * Enable counters and exec the command:
534 if (WIFSIGNALED(status))
535 psignal(WTERMSIG(status), argv[0]);
537 while(!done) sleep(1);
542 update_stats(&walltime_nsecs_stats, t1 - t0);
545 list_for_each_entry(counter, &evsel_list->entries, node) {
546 read_counter(counter);
547 perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1);
550 list_for_each_entry(counter, &evsel_list->entries, node) {
551 read_counter_aggr(counter);
552 perf_evsel__close_fd(counter, evsel_list->cpus->nr,
553 evsel_list->threads->nr);
557 return WEXITSTATUS(status);
560 static void print_noise_pct(double total, double avg)
565 pct = 100.0*total/avg;
568 fprintf(output, "%s%.2f%%", csv_sep, pct);
570 fprintf(output, " ( +-%6.2f%% )", pct);
573 static void print_noise(struct perf_evsel *evsel, double avg)
575 struct perf_stat *ps;
581 print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
584 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
586 double msecs = avg / 1e6;
587 char cpustr[16] = { '\0', };
588 const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
591 sprintf(cpustr, "CPU%*d%s",
593 evsel_list->cpus->map[cpu], csv_sep);
595 fprintf(output, fmt, cpustr, msecs, csv_sep, perf_evsel__name(evsel));
598 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
603 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
604 fprintf(output, " # %8.3f CPUs utilized ",
605 avg / avg_stats(&walltime_nsecs_stats));
607 fprintf(output, " ");
610 /* used for get_ratio_color() */
612 GRC_STALLED_CYCLES_FE,
613 GRC_STALLED_CYCLES_BE,
618 static const char *get_ratio_color(enum grc_type type, double ratio)
620 static const double grc_table[GRC_MAX_NR][3] = {
621 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
622 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
623 [GRC_CACHE_MISSES] = { 20.0, 10.0, 5.0 },
625 const char *color = PERF_COLOR_NORMAL;
627 if (ratio > grc_table[type][0])
628 color = PERF_COLOR_RED;
629 else if (ratio > grc_table[type][1])
630 color = PERF_COLOR_MAGENTA;
631 else if (ratio > grc_table[type][2])
632 color = PERF_COLOR_YELLOW;
637 static void print_stalled_cycles_frontend(int cpu, struct perf_evsel *evsel __used, double avg)
639 double total, ratio = 0.0;
642 total = avg_stats(&runtime_cycles_stats[cpu]);
645 ratio = avg / total * 100.0;
647 color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
649 fprintf(output, " # ");
650 color_fprintf(output, color, "%6.2f%%", ratio);
651 fprintf(output, " frontend cycles idle ");
654 static void print_stalled_cycles_backend(int cpu, struct perf_evsel *evsel __used, double avg)
656 double total, ratio = 0.0;
659 total = avg_stats(&runtime_cycles_stats[cpu]);
662 ratio = avg / total * 100.0;
664 color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
666 fprintf(output, " # ");
667 color_fprintf(output, color, "%6.2f%%", ratio);
668 fprintf(output, " backend cycles idle ");
671 static void print_branch_misses(int cpu, struct perf_evsel *evsel __used, double avg)
673 double total, ratio = 0.0;
676 total = avg_stats(&runtime_branches_stats[cpu]);
679 ratio = avg / total * 100.0;
681 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
683 fprintf(output, " # ");
684 color_fprintf(output, color, "%6.2f%%", ratio);
685 fprintf(output, " of all branches ");
688 static void print_l1_dcache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
690 double total, ratio = 0.0;
693 total = avg_stats(&runtime_l1_dcache_stats[cpu]);
696 ratio = avg / total * 100.0;
698 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
700 fprintf(output, " # ");
701 color_fprintf(output, color, "%6.2f%%", ratio);
702 fprintf(output, " of all L1-dcache hits ");
705 static void print_l1_icache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
707 double total, ratio = 0.0;
710 total = avg_stats(&runtime_l1_icache_stats[cpu]);
713 ratio = avg / total * 100.0;
715 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
717 fprintf(output, " # ");
718 color_fprintf(output, color, "%6.2f%%", ratio);
719 fprintf(output, " of all L1-icache hits ");
722 static void print_dtlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
724 double total, ratio = 0.0;
727 total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
730 ratio = avg / total * 100.0;
732 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
734 fprintf(output, " # ");
735 color_fprintf(output, color, "%6.2f%%", ratio);
736 fprintf(output, " of all dTLB cache hits ");
739 static void print_itlb_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
741 double total, ratio = 0.0;
744 total = avg_stats(&runtime_itlb_cache_stats[cpu]);
747 ratio = avg / total * 100.0;
749 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
751 fprintf(output, " # ");
752 color_fprintf(output, color, "%6.2f%%", ratio);
753 fprintf(output, " of all iTLB cache hits ");
756 static void print_ll_cache_misses(int cpu, struct perf_evsel *evsel __used, double avg)
758 double total, ratio = 0.0;
761 total = avg_stats(&runtime_ll_cache_stats[cpu]);
764 ratio = avg / total * 100.0;
766 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
768 fprintf(output, " # ");
769 color_fprintf(output, color, "%6.2f%%", ratio);
770 fprintf(output, " of all LL-cache hits ");
773 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
775 double total, ratio = 0.0;
776 char cpustr[16] = { '\0', };
782 fmt = "%s%'18.0f%s%-25s";
784 fmt = "%s%18.0f%s%-25s";
787 sprintf(cpustr, "CPU%*d%s",
789 evsel_list->cpus->map[cpu], csv_sep);
793 fprintf(output, fmt, cpustr, avg, csv_sep, perf_evsel__name(evsel));
796 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
801 if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
802 total = avg_stats(&runtime_cycles_stats[cpu]);
807 fprintf(output, " # %5.2f insns per cycle ", ratio);
809 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
810 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
814 fprintf(output, "\n # %5.2f stalled cycles per insn", ratio);
817 } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
818 runtime_branches_stats[cpu].n != 0) {
819 print_branch_misses(cpu, evsel, avg);
821 evsel->attr.type == PERF_TYPE_HW_CACHE &&
822 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1D |
823 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
824 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
825 runtime_l1_dcache_stats[cpu].n != 0) {
826 print_l1_dcache_misses(cpu, evsel, avg);
828 evsel->attr.type == PERF_TYPE_HW_CACHE &&
829 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1I |
830 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
831 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
832 runtime_l1_icache_stats[cpu].n != 0) {
833 print_l1_icache_misses(cpu, evsel, avg);
835 evsel->attr.type == PERF_TYPE_HW_CACHE &&
836 evsel->attr.config == ( PERF_COUNT_HW_CACHE_DTLB |
837 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
838 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
839 runtime_dtlb_cache_stats[cpu].n != 0) {
840 print_dtlb_cache_misses(cpu, evsel, avg);
842 evsel->attr.type == PERF_TYPE_HW_CACHE &&
843 evsel->attr.config == ( PERF_COUNT_HW_CACHE_ITLB |
844 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
845 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
846 runtime_itlb_cache_stats[cpu].n != 0) {
847 print_itlb_cache_misses(cpu, evsel, avg);
849 evsel->attr.type == PERF_TYPE_HW_CACHE &&
850 evsel->attr.config == ( PERF_COUNT_HW_CACHE_LL |
851 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
852 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
853 runtime_ll_cache_stats[cpu].n != 0) {
854 print_ll_cache_misses(cpu, evsel, avg);
855 } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
856 runtime_cacherefs_stats[cpu].n != 0) {
857 total = avg_stats(&runtime_cacherefs_stats[cpu]);
860 ratio = avg * 100 / total;
862 fprintf(output, " # %8.3f %% of all cache refs ", ratio);
864 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
865 print_stalled_cycles_frontend(cpu, evsel, avg);
866 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
867 print_stalled_cycles_backend(cpu, evsel, avg);
868 } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
869 total = avg_stats(&runtime_nsecs_stats[cpu]);
872 ratio = 1.0 * avg / total;
874 fprintf(output, " # %8.3f GHz ", ratio);
875 } else if (runtime_nsecs_stats[cpu].n != 0) {
878 total = avg_stats(&runtime_nsecs_stats[cpu]);
881 ratio = 1000.0 * avg / total;
887 fprintf(output, " # %8.3f %c/sec ", ratio, unit);
889 fprintf(output, " ");
894 * Print out the results of a single counter:
895 * aggregated counts in system-wide mode
897 static void print_counter_aggr(struct perf_evsel *counter)
899 struct perf_stat *ps = counter->priv;
900 double avg = avg_stats(&ps->res_stats[0]);
901 int scaled = counter->counts->scaled;
904 fprintf(output, "%*s%s%*s",
906 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
908 csv_output ? 0 : -24,
909 perf_evsel__name(counter));
912 fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
918 if (nsec_counter(counter))
919 nsec_printout(-1, counter, avg);
921 abs_printout(-1, counter, avg);
923 print_noise(counter, avg);
931 double avg_enabled, avg_running;
933 avg_enabled = avg_stats(&ps->res_stats[1]);
934 avg_running = avg_stats(&ps->res_stats[2]);
936 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
938 fprintf(output, "\n");
942 * Print out the results of a single counter:
943 * does not use aggregated count in system-wide
945 static void print_counter(struct perf_evsel *counter)
950 for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
951 val = counter->counts->cpu[cpu].val;
952 ena = counter->counts->cpu[cpu].ena;
953 run = counter->counts->cpu[cpu].run;
954 if (run == 0 || ena == 0) {
955 fprintf(output, "CPU%*d%s%*s%s%*s",
957 evsel_list->cpus->map[cpu], csv_sep,
959 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
961 csv_output ? 0 : -24,
962 perf_evsel__name(counter));
965 fprintf(output, "%s%s",
966 csv_sep, counter->cgrp->name);
972 if (nsec_counter(counter))
973 nsec_printout(cpu, counter, val);
975 abs_printout(cpu, counter, val);
978 print_noise(counter, 1.0);
981 fprintf(output, " (%.2f%%)",
988 static void print_stat(int argc, const char **argv)
990 struct perf_evsel *counter;
996 fprintf(output, "\n");
997 fprintf(output, " Performance counter stats for ");
998 if (!perf_target__has_task(&target)) {
999 fprintf(output, "\'%s", argv[0]);
1000 for (i = 1; i < argc; i++)
1001 fprintf(output, " %s", argv[i]);
1002 } else if (target.pid)
1003 fprintf(output, "process id \'%s", target.pid);
1005 fprintf(output, "thread id \'%s", target.tid);
1007 fprintf(output, "\'");
1009 fprintf(output, " (%d runs)", run_count);
1010 fprintf(output, ":\n\n");
1014 list_for_each_entry(counter, &evsel_list->entries, node)
1015 print_counter(counter);
1017 list_for_each_entry(counter, &evsel_list->entries, node)
1018 print_counter_aggr(counter);
1023 fprintf(output, "\n");
1024 fprintf(output, " %17.9f seconds time elapsed",
1025 avg_stats(&walltime_nsecs_stats)/1e9);
1026 if (run_count > 1) {
1027 fprintf(output, " ");
1028 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1029 avg_stats(&walltime_nsecs_stats));
1031 fprintf(output, "\n\n");
1035 static volatile int signr = -1;
1037 static void skip_signal(int signo)
1045 static void sig_atexit(void)
1047 if (child_pid != -1)
1048 kill(child_pid, SIGTERM);
1053 signal(signr, SIG_DFL);
1054 kill(getpid(), signr);
1057 static const char * const stat_usage[] = {
1058 "perf stat [<options>] [<command>]",
1062 static int stat__set_big_num(const struct option *opt __used,
1063 const char *s __used, int unset)
1065 big_num_opt = unset ? 0 : 1;
1069 static bool append_file;
1071 static const struct option options[] = {
1072 OPT_CALLBACK('e', "event", &evsel_list, "event",
1073 "event selector. use 'perf list' to list available events",
1074 parse_events_option),
1075 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1076 "event filter", parse_filter),
1077 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1078 "child tasks do not inherit counters"),
1079 OPT_STRING('p', "pid", &target.pid, "pid",
1080 "stat events on existing process id"),
1081 OPT_STRING('t', "tid", &target.tid, "tid",
1082 "stat events on existing thread id"),
1083 OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1084 "system-wide collection from all CPUs"),
1085 OPT_BOOLEAN('g', "group", &group,
1086 "put the counters into a counter group"),
1087 OPT_BOOLEAN('c', "scale", &scale,
1088 "scale/normalize counters"),
1089 OPT_INCR('v', "verbose", &verbose,
1090 "be more verbose (show counter open errors, etc)"),
1091 OPT_INTEGER('r', "repeat", &run_count,
1092 "repeat command and print average + stddev (max: 100)"),
1093 OPT_BOOLEAN('n', "null", &null_run,
1094 "null run - dont start any counters"),
1095 OPT_INCR('d', "detailed", &detailed_run,
1096 "detailed run - start a lot of events"),
1097 OPT_BOOLEAN('S', "sync", &sync_run,
1098 "call sync() before starting a run"),
1099 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1100 "print large numbers with thousands\' separators",
1102 OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1103 "list of cpus to monitor in system-wide"),
1104 OPT_BOOLEAN('A', "no-aggr", &no_aggr,
1105 "disable CPU count aggregation"),
1106 OPT_STRING('x', "field-separator", &csv_sep, "separator",
1107 "print counts with custom separator"),
1108 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1109 "monitor event in cgroup name only",
1111 OPT_STRING('o', "output", &output_name, "file",
1112 "output file name"),
1113 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1114 OPT_INTEGER(0, "log-fd", &output_fd,
1115 "log output to fd, instead of stderr"),
1120 * Add default attributes, if there were no attributes specified or
1121 * if -d/--detailed, -d -d or -d -d -d is used:
1123 static int add_default_attributes(void)
1125 /* Set attrs if no event is selected and !null_run: */
1129 if (!evsel_list->nr_entries) {
1130 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1134 /* Detailed events get appended to the event list: */
1136 if (detailed_run < 1)
1139 /* Append detailed run extra attributes: */
1140 if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1143 if (detailed_run < 2)
1146 /* Append very detailed run extra attributes: */
1147 if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1150 if (detailed_run < 3)
1153 /* Append very, very detailed run extra attributes: */
1154 return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1157 int cmd_stat(int argc, const char **argv, const char *prefix __used)
1159 struct perf_evsel *pos;
1160 int status = -ENOMEM;
1163 setlocale(LC_ALL, "");
1165 evsel_list = perf_evlist__new(NULL, NULL);
1166 if (evsel_list == NULL)
1169 argc = parse_options(argc, argv, options, stat_usage,
1170 PARSE_OPT_STOP_AT_NON_OPTION);
1173 if (output_name && strcmp(output_name, "-"))
1176 if (output_name && output_fd) {
1177 fprintf(stderr, "cannot use both --output and --log-fd\n");
1178 usage_with_options(stat_usage, options);
1181 if (output_fd < 0) {
1182 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1183 usage_with_options(stat_usage, options);
1188 mode = append_file ? "a" : "w";
1190 output = fopen(output_name, mode);
1192 perror("failed to create output file");
1195 clock_gettime(CLOCK_REALTIME, &tm);
1196 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1197 } else if (output_fd > 0) {
1198 mode = append_file ? "a" : "w";
1199 output = fdopen(output_fd, mode);
1201 perror("Failed opening logfd");
1208 if (!strcmp(csv_sep, "\\t"))
1211 csv_sep = DEFAULT_SEPARATOR;
1214 * let the spreadsheet do the pretty-printing
1217 /* User explicitly passed -B? */
1218 if (big_num_opt == 1) {
1219 fprintf(stderr, "-B option not supported with -x\n");
1220 usage_with_options(stat_usage, options);
1221 } else /* Nope, so disable big number formatting */
1223 } else if (big_num_opt == 0) /* User passed --no-big-num */
1226 if (!argc && !perf_target__has_task(&target))
1227 usage_with_options(stat_usage, options);
1229 usage_with_options(stat_usage, options);
1231 /* no_aggr, cgroup are for system-wide only */
1232 if ((no_aggr || nr_cgroups) && !perf_target__has_cpu(&target)) {
1233 fprintf(stderr, "both cgroup and no-aggregation "
1234 "modes only available in system-wide mode\n");
1236 usage_with_options(stat_usage, options);
1239 if (add_default_attributes())
1242 perf_target__validate(&target);
1244 if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1245 if (perf_target__has_task(&target))
1246 pr_err("Problems finding threads of monitor\n");
1247 if (perf_target__has_cpu(&target))
1248 perror("failed to parse CPUs map");
1250 usage_with_options(stat_usage, options);
1254 list_for_each_entry(pos, &evsel_list->entries, node) {
1255 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1256 perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0)
1261 * We dont want to block the signals - that would cause
1262 * child tasks to inherit that and Ctrl-C would not work.
1263 * What we want is for Ctrl-C to work in the exec()-ed
1264 * task, but being ignored by perf stat itself:
1267 signal(SIGINT, skip_signal);
1268 signal(SIGALRM, skip_signal);
1269 signal(SIGABRT, skip_signal);
1272 for (run_idx = 0; run_idx < run_count; run_idx++) {
1273 if (run_count != 1 && verbose)
1274 fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1280 status = run_perf_stat(argc, argv);
1284 print_stat(argc, argv);
1286 list_for_each_entry(pos, &evsel_list->entries, node)
1287 perf_evsel__free_stat_priv(pos);
1288 perf_evlist__delete_maps(evsel_list);
1290 perf_evlist__delete(evsel_list);