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/stat.h"
55 #include "util/header.h"
56 #include "util/cpumap.h"
57 #include "util/thread.h"
58 #include "util/thread_map.h"
60 #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;
203 struct stats res_stats[3];
206 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
208 evsel->priv = zalloc(sizeof(struct perf_stat));
209 return evsel->priv == NULL ? -ENOMEM : 0;
212 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
218 static inline struct cpu_map *perf_evsel__cpus(struct perf_evsel *evsel)
220 return (evsel->cpus && !target.cpu_list) ? evsel->cpus : evsel_list->cpus;
223 static inline int perf_evsel__nr_cpus(struct perf_evsel *evsel)
225 return perf_evsel__cpus(evsel)->nr;
228 static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
229 static struct stats runtime_cycles_stats[MAX_NR_CPUS];
230 static struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
231 static struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
232 static struct stats runtime_branches_stats[MAX_NR_CPUS];
233 static struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
234 static struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
235 static struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
236 static struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
237 static struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
238 static struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
239 static struct stats walltime_nsecs_stats;
241 static int create_perf_stat_counter(struct perf_evsel *evsel,
242 struct perf_evsel *first)
244 struct perf_event_attr *attr = &evsel->attr;
245 bool exclude_guest_missing = false;
249 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
250 PERF_FORMAT_TOTAL_TIME_RUNNING;
252 attr->inherit = !no_inherit;
255 if (exclude_guest_missing)
256 evsel->attr.exclude_guest = evsel->attr.exclude_host = 0;
258 if (perf_target__has_cpu(&target)) {
259 ret = perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
265 if (!perf_target__has_task(&target) && (!group || evsel == first)) {
267 attr->enable_on_exec = 1;
270 ret = perf_evsel__open_per_thread(evsel, evsel_list->threads);
275 if (ret && errno == EINVAL) {
276 if (!exclude_guest_missing &&
277 (evsel->attr.exclude_guest || evsel->attr.exclude_host)) {
278 pr_debug("Old kernel, cannot exclude "
279 "guest or host samples.\n");
280 exclude_guest_missing = true;
288 * Does the counter have nsecs as a unit?
290 static inline int nsec_counter(struct perf_evsel *evsel)
292 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
293 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
300 * Update various tracking values we maintain to print
301 * more semantic information such as miss/hit ratios,
302 * instruction rates, etc:
304 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
306 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
307 update_stats(&runtime_nsecs_stats[0], count[0]);
308 else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
309 update_stats(&runtime_cycles_stats[0], count[0]);
310 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
311 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
312 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
313 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
314 else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
315 update_stats(&runtime_branches_stats[0], count[0]);
316 else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
317 update_stats(&runtime_cacherefs_stats[0], count[0]);
318 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
319 update_stats(&runtime_l1_dcache_stats[0], count[0]);
320 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
321 update_stats(&runtime_l1_icache_stats[0], count[0]);
322 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
323 update_stats(&runtime_ll_cache_stats[0], count[0]);
324 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
325 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
326 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
327 update_stats(&runtime_itlb_cache_stats[0], count[0]);
331 * Read out the results of a single counter:
332 * aggregate counts across CPUs in system-wide mode
334 static int read_counter_aggr(struct perf_evsel *counter)
336 struct perf_stat *ps = counter->priv;
337 u64 *count = counter->counts->aggr.values;
340 if (__perf_evsel__read(counter, perf_evsel__nr_cpus(counter),
341 evsel_list->threads->nr, scale) < 0)
344 for (i = 0; i < 3; i++)
345 update_stats(&ps->res_stats[i], count[i]);
348 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
349 perf_evsel__name(counter), count[0], count[1], count[2]);
353 * Save the full runtime - to allow normalization during printout:
355 update_shadow_stats(counter, count);
361 * Read out the results of a single counter:
362 * do not aggregate counts across CPUs in system-wide mode
364 static int read_counter(struct perf_evsel *counter)
369 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
370 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
373 count = counter->counts->cpu[cpu].values;
375 update_shadow_stats(counter, count);
381 static int run_perf_stat(int argc __maybe_unused, const char **argv)
383 unsigned long long t0, t1;
384 struct perf_evsel *counter, *first;
386 int child_ready_pipe[2], go_pipe[2];
387 const bool forks = (argc > 0);
390 if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
391 perror("failed to create pipes");
396 if ((child_pid = fork()) < 0)
397 perror("failed to fork");
400 close(child_ready_pipe[0]);
402 fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
405 * Do a dummy execvp to get the PLT entry resolved,
406 * so we avoid the resolver overhead on the real
409 execvp("", (char **)argv);
412 * Tell the parent we're ready to go
414 close(child_ready_pipe[1]);
417 * Wait until the parent tells us to go.
419 if (read(go_pipe[0], &buf, 1) == -1)
420 perror("unable to read pipe");
422 execvp(argv[0], (char **)argv);
428 if (perf_target__none(&target))
429 evsel_list->threads->map[0] = child_pid;
432 * Wait for the child to be ready to exec.
434 close(child_ready_pipe[1]);
436 if (read(child_ready_pipe[0], &buf, 1) == -1)
437 perror("unable to read pipe");
438 close(child_ready_pipe[0]);
442 perf_evlist__set_leader(evsel_list);
444 first = perf_evlist__first(evsel_list);
446 list_for_each_entry(counter, &evsel_list->entries, node) {
447 if (create_perf_stat_counter(counter, first) < 0) {
449 * PPC returns ENXIO for HW counters until 2.6.37
450 * (behavior changed with commit b0a873e).
452 if (errno == EINVAL || errno == ENOSYS ||
453 errno == ENOENT || errno == EOPNOTSUPP ||
456 ui__warning("%s event is not supported by the kernel.\n",
457 perf_evsel__name(counter));
458 counter->supported = false;
462 if (errno == EPERM || errno == EACCES) {
463 error("You may not have permission to collect %sstats.\n"
464 "\t Consider tweaking"
465 " /proc/sys/kernel/perf_event_paranoid or running as root.",
466 target.system_wide ? "system-wide " : "");
468 error("open_counter returned with %d (%s). "
469 "/bin/dmesg may provide additional information.\n",
470 errno, strerror(errno));
473 kill(child_pid, SIGTERM);
475 pr_err("Not all events could be opened.\n");
478 counter->supported = true;
481 if (perf_evlist__apply_filters(evsel_list)) {
482 error("failed to set filter with %d (%s)\n", errno,
488 * Enable counters and exec the command:
495 if (WIFSIGNALED(status))
496 psignal(WTERMSIG(status), argv[0]);
498 while(!done) sleep(1);
503 update_stats(&walltime_nsecs_stats, t1 - t0);
506 list_for_each_entry(counter, &evsel_list->entries, node) {
507 read_counter(counter);
508 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
511 list_for_each_entry(counter, &evsel_list->entries, node) {
512 read_counter_aggr(counter);
513 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
514 evsel_list->threads->nr);
518 return WEXITSTATUS(status);
521 static void print_noise_pct(double total, double avg)
523 double pct = rel_stddev_stats(total, avg);
526 fprintf(output, "%s%.2f%%", csv_sep, pct);
528 fprintf(output, " ( +-%6.2f%% )", pct);
531 static void print_noise(struct perf_evsel *evsel, double avg)
533 struct perf_stat *ps;
539 print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
542 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
544 double msecs = avg / 1e6;
545 char cpustr[16] = { '\0', };
546 const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
549 sprintf(cpustr, "CPU%*d%s",
551 perf_evsel__cpus(evsel)->map[cpu], csv_sep);
553 fprintf(output, fmt, cpustr, msecs, csv_sep, perf_evsel__name(evsel));
556 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
561 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
562 fprintf(output, " # %8.3f CPUs utilized ",
563 avg / avg_stats(&walltime_nsecs_stats));
565 fprintf(output, " ");
568 /* used for get_ratio_color() */
570 GRC_STALLED_CYCLES_FE,
571 GRC_STALLED_CYCLES_BE,
576 static const char *get_ratio_color(enum grc_type type, double ratio)
578 static const double grc_table[GRC_MAX_NR][3] = {
579 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
580 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
581 [GRC_CACHE_MISSES] = { 20.0, 10.0, 5.0 },
583 const char *color = PERF_COLOR_NORMAL;
585 if (ratio > grc_table[type][0])
586 color = PERF_COLOR_RED;
587 else if (ratio > grc_table[type][1])
588 color = PERF_COLOR_MAGENTA;
589 else if (ratio > grc_table[type][2])
590 color = PERF_COLOR_YELLOW;
595 static void print_stalled_cycles_frontend(int cpu,
596 struct perf_evsel *evsel
597 __maybe_unused, double avg)
599 double total, ratio = 0.0;
602 total = avg_stats(&runtime_cycles_stats[cpu]);
605 ratio = avg / total * 100.0;
607 color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
609 fprintf(output, " # ");
610 color_fprintf(output, color, "%6.2f%%", ratio);
611 fprintf(output, " frontend cycles idle ");
614 static void print_stalled_cycles_backend(int cpu,
615 struct perf_evsel *evsel
616 __maybe_unused, double avg)
618 double total, ratio = 0.0;
621 total = avg_stats(&runtime_cycles_stats[cpu]);
624 ratio = avg / total * 100.0;
626 color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
628 fprintf(output, " # ");
629 color_fprintf(output, color, "%6.2f%%", ratio);
630 fprintf(output, " backend cycles idle ");
633 static void print_branch_misses(int cpu,
634 struct perf_evsel *evsel __maybe_unused,
637 double total, ratio = 0.0;
640 total = avg_stats(&runtime_branches_stats[cpu]);
643 ratio = avg / total * 100.0;
645 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
647 fprintf(output, " # ");
648 color_fprintf(output, color, "%6.2f%%", ratio);
649 fprintf(output, " of all branches ");
652 static void print_l1_dcache_misses(int cpu,
653 struct perf_evsel *evsel __maybe_unused,
656 double total, ratio = 0.0;
659 total = avg_stats(&runtime_l1_dcache_stats[cpu]);
662 ratio = avg / total * 100.0;
664 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
666 fprintf(output, " # ");
667 color_fprintf(output, color, "%6.2f%%", ratio);
668 fprintf(output, " of all L1-dcache hits ");
671 static void print_l1_icache_misses(int cpu,
672 struct perf_evsel *evsel __maybe_unused,
675 double total, ratio = 0.0;
678 total = avg_stats(&runtime_l1_icache_stats[cpu]);
681 ratio = avg / total * 100.0;
683 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
685 fprintf(output, " # ");
686 color_fprintf(output, color, "%6.2f%%", ratio);
687 fprintf(output, " of all L1-icache hits ");
690 static void print_dtlb_cache_misses(int cpu,
691 struct perf_evsel *evsel __maybe_unused,
694 double total, ratio = 0.0;
697 total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
700 ratio = avg / total * 100.0;
702 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
704 fprintf(output, " # ");
705 color_fprintf(output, color, "%6.2f%%", ratio);
706 fprintf(output, " of all dTLB cache hits ");
709 static void print_itlb_cache_misses(int cpu,
710 struct perf_evsel *evsel __maybe_unused,
713 double total, ratio = 0.0;
716 total = avg_stats(&runtime_itlb_cache_stats[cpu]);
719 ratio = avg / total * 100.0;
721 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
723 fprintf(output, " # ");
724 color_fprintf(output, color, "%6.2f%%", ratio);
725 fprintf(output, " of all iTLB cache hits ");
728 static void print_ll_cache_misses(int cpu,
729 struct perf_evsel *evsel __maybe_unused,
732 double total, ratio = 0.0;
735 total = avg_stats(&runtime_ll_cache_stats[cpu]);
738 ratio = avg / total * 100.0;
740 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
742 fprintf(output, " # ");
743 color_fprintf(output, color, "%6.2f%%", ratio);
744 fprintf(output, " of all LL-cache hits ");
747 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
749 double total, ratio = 0.0;
750 char cpustr[16] = { '\0', };
756 fmt = "%s%'18.0f%s%-25s";
758 fmt = "%s%18.0f%s%-25s";
761 sprintf(cpustr, "CPU%*d%s",
763 perf_evsel__cpus(evsel)->map[cpu], csv_sep);
767 fprintf(output, fmt, cpustr, avg, csv_sep, perf_evsel__name(evsel));
770 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
775 if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
776 total = avg_stats(&runtime_cycles_stats[cpu]);
781 fprintf(output, " # %5.2f insns per cycle ", ratio);
783 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
784 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
788 fprintf(output, "\n # %5.2f stalled cycles per insn", ratio);
791 } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
792 runtime_branches_stats[cpu].n != 0) {
793 print_branch_misses(cpu, evsel, avg);
795 evsel->attr.type == PERF_TYPE_HW_CACHE &&
796 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1D |
797 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
798 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
799 runtime_l1_dcache_stats[cpu].n != 0) {
800 print_l1_dcache_misses(cpu, evsel, avg);
802 evsel->attr.type == PERF_TYPE_HW_CACHE &&
803 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1I |
804 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
805 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
806 runtime_l1_icache_stats[cpu].n != 0) {
807 print_l1_icache_misses(cpu, evsel, avg);
809 evsel->attr.type == PERF_TYPE_HW_CACHE &&
810 evsel->attr.config == ( PERF_COUNT_HW_CACHE_DTLB |
811 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
812 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
813 runtime_dtlb_cache_stats[cpu].n != 0) {
814 print_dtlb_cache_misses(cpu, evsel, avg);
816 evsel->attr.type == PERF_TYPE_HW_CACHE &&
817 evsel->attr.config == ( PERF_COUNT_HW_CACHE_ITLB |
818 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
819 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
820 runtime_itlb_cache_stats[cpu].n != 0) {
821 print_itlb_cache_misses(cpu, evsel, avg);
823 evsel->attr.type == PERF_TYPE_HW_CACHE &&
824 evsel->attr.config == ( PERF_COUNT_HW_CACHE_LL |
825 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
826 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
827 runtime_ll_cache_stats[cpu].n != 0) {
828 print_ll_cache_misses(cpu, evsel, avg);
829 } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
830 runtime_cacherefs_stats[cpu].n != 0) {
831 total = avg_stats(&runtime_cacherefs_stats[cpu]);
834 ratio = avg * 100 / total;
836 fprintf(output, " # %8.3f %% of all cache refs ", ratio);
838 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
839 print_stalled_cycles_frontend(cpu, evsel, avg);
840 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
841 print_stalled_cycles_backend(cpu, evsel, avg);
842 } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
843 total = avg_stats(&runtime_nsecs_stats[cpu]);
846 ratio = 1.0 * avg / total;
848 fprintf(output, " # %8.3f GHz ", ratio);
849 } else if (runtime_nsecs_stats[cpu].n != 0) {
852 total = avg_stats(&runtime_nsecs_stats[cpu]);
855 ratio = 1000.0 * avg / total;
861 fprintf(output, " # %8.3f %c/sec ", ratio, unit);
863 fprintf(output, " ");
868 * Print out the results of a single counter:
869 * aggregated counts in system-wide mode
871 static void print_counter_aggr(struct perf_evsel *counter)
873 struct perf_stat *ps = counter->priv;
874 double avg = avg_stats(&ps->res_stats[0]);
875 int scaled = counter->counts->scaled;
878 fprintf(output, "%*s%s%*s",
880 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
882 csv_output ? 0 : -24,
883 perf_evsel__name(counter));
886 fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
892 if (nsec_counter(counter))
893 nsec_printout(-1, counter, avg);
895 abs_printout(-1, counter, avg);
897 print_noise(counter, avg);
905 double avg_enabled, avg_running;
907 avg_enabled = avg_stats(&ps->res_stats[1]);
908 avg_running = avg_stats(&ps->res_stats[2]);
910 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
912 fprintf(output, "\n");
916 * Print out the results of a single counter:
917 * does not use aggregated count in system-wide
919 static void print_counter(struct perf_evsel *counter)
924 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
925 val = counter->counts->cpu[cpu].val;
926 ena = counter->counts->cpu[cpu].ena;
927 run = counter->counts->cpu[cpu].run;
928 if (run == 0 || ena == 0) {
929 fprintf(output, "CPU%*d%s%*s%s%*s",
931 perf_evsel__cpus(counter)->map[cpu], csv_sep,
933 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
935 csv_output ? 0 : -24,
936 perf_evsel__name(counter));
939 fprintf(output, "%s%s",
940 csv_sep, counter->cgrp->name);
946 if (nsec_counter(counter))
947 nsec_printout(cpu, counter, val);
949 abs_printout(cpu, counter, val);
952 print_noise(counter, 1.0);
955 fprintf(output, " (%.2f%%)",
962 static void print_stat(int argc, const char **argv)
964 struct perf_evsel *counter;
970 fprintf(output, "\n");
971 fprintf(output, " Performance counter stats for ");
972 if (!perf_target__has_task(&target)) {
973 fprintf(output, "\'%s", argv[0]);
974 for (i = 1; i < argc; i++)
975 fprintf(output, " %s", argv[i]);
976 } else if (target.pid)
977 fprintf(output, "process id \'%s", target.pid);
979 fprintf(output, "thread id \'%s", target.tid);
981 fprintf(output, "\'");
983 fprintf(output, " (%d runs)", run_count);
984 fprintf(output, ":\n\n");
988 list_for_each_entry(counter, &evsel_list->entries, node)
989 print_counter(counter);
991 list_for_each_entry(counter, &evsel_list->entries, node)
992 print_counter_aggr(counter);
997 fprintf(output, "\n");
998 fprintf(output, " %17.9f seconds time elapsed",
999 avg_stats(&walltime_nsecs_stats)/1e9);
1000 if (run_count > 1) {
1001 fprintf(output, " ");
1002 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1003 avg_stats(&walltime_nsecs_stats));
1005 fprintf(output, "\n\n");
1009 static volatile int signr = -1;
1011 static void skip_signal(int signo)
1019 static void sig_atexit(void)
1021 if (child_pid != -1)
1022 kill(child_pid, SIGTERM);
1027 signal(signr, SIG_DFL);
1028 kill(getpid(), signr);
1031 static const char * const stat_usage[] = {
1032 "perf stat [<options>] [<command>]",
1036 static int stat__set_big_num(const struct option *opt __maybe_unused,
1037 const char *s __maybe_unused, int unset)
1039 big_num_opt = unset ? 0 : 1;
1043 static bool append_file;
1045 static const struct option options[] = {
1046 OPT_CALLBACK('e', "event", &evsel_list, "event",
1047 "event selector. use 'perf list' to list available events",
1048 parse_events_option),
1049 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1050 "event filter", parse_filter),
1051 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1052 "child tasks do not inherit counters"),
1053 OPT_STRING('p', "pid", &target.pid, "pid",
1054 "stat events on existing process id"),
1055 OPT_STRING('t', "tid", &target.tid, "tid",
1056 "stat events on existing thread id"),
1057 OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1058 "system-wide collection from all CPUs"),
1059 OPT_BOOLEAN('g', "group", &group,
1060 "put the counters into a counter group"),
1061 OPT_BOOLEAN('c', "scale", &scale,
1062 "scale/normalize counters"),
1063 OPT_INCR('v', "verbose", &verbose,
1064 "be more verbose (show counter open errors, etc)"),
1065 OPT_INTEGER('r', "repeat", &run_count,
1066 "repeat command and print average + stddev (max: 100)"),
1067 OPT_BOOLEAN('n', "null", &null_run,
1068 "null run - dont start any counters"),
1069 OPT_INCR('d', "detailed", &detailed_run,
1070 "detailed run - start a lot of events"),
1071 OPT_BOOLEAN('S', "sync", &sync_run,
1072 "call sync() before starting a run"),
1073 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1074 "print large numbers with thousands\' separators",
1076 OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1077 "list of cpus to monitor in system-wide"),
1078 OPT_BOOLEAN('A', "no-aggr", &no_aggr,
1079 "disable CPU count aggregation"),
1080 OPT_STRING('x', "field-separator", &csv_sep, "separator",
1081 "print counts with custom separator"),
1082 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1083 "monitor event in cgroup name only",
1085 OPT_STRING('o', "output", &output_name, "file",
1086 "output file name"),
1087 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1088 OPT_INTEGER(0, "log-fd", &output_fd,
1089 "log output to fd, instead of stderr"),
1094 * Add default attributes, if there were no attributes specified or
1095 * if -d/--detailed, -d -d or -d -d -d is used:
1097 static int add_default_attributes(void)
1099 /* Set attrs if no event is selected and !null_run: */
1103 if (!evsel_list->nr_entries) {
1104 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1108 /* Detailed events get appended to the event list: */
1110 if (detailed_run < 1)
1113 /* Append detailed run extra attributes: */
1114 if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1117 if (detailed_run < 2)
1120 /* Append very detailed run extra attributes: */
1121 if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1124 if (detailed_run < 3)
1127 /* Append very, very detailed run extra attributes: */
1128 return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1131 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
1133 struct perf_evsel *pos;
1134 int status = -ENOMEM;
1137 setlocale(LC_ALL, "");
1139 evsel_list = perf_evlist__new(NULL, NULL);
1140 if (evsel_list == NULL)
1143 argc = parse_options(argc, argv, options, stat_usage,
1144 PARSE_OPT_STOP_AT_NON_OPTION);
1147 if (output_name && strcmp(output_name, "-"))
1150 if (output_name && output_fd) {
1151 fprintf(stderr, "cannot use both --output and --log-fd\n");
1152 usage_with_options(stat_usage, options);
1155 if (output_fd < 0) {
1156 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1157 usage_with_options(stat_usage, options);
1162 mode = append_file ? "a" : "w";
1164 output = fopen(output_name, mode);
1166 perror("failed to create output file");
1169 clock_gettime(CLOCK_REALTIME, &tm);
1170 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1171 } else if (output_fd > 0) {
1172 mode = append_file ? "a" : "w";
1173 output = fdopen(output_fd, mode);
1175 perror("Failed opening logfd");
1182 if (!strcmp(csv_sep, "\\t"))
1185 csv_sep = DEFAULT_SEPARATOR;
1188 * let the spreadsheet do the pretty-printing
1191 /* User explicitly passed -B? */
1192 if (big_num_opt == 1) {
1193 fprintf(stderr, "-B option not supported with -x\n");
1194 usage_with_options(stat_usage, options);
1195 } else /* Nope, so disable big number formatting */
1197 } else if (big_num_opt == 0) /* User passed --no-big-num */
1200 if (!argc && !perf_target__has_task(&target))
1201 usage_with_options(stat_usage, options);
1203 usage_with_options(stat_usage, options);
1205 /* no_aggr, cgroup are for system-wide only */
1206 if ((no_aggr || nr_cgroups) && !perf_target__has_cpu(&target)) {
1207 fprintf(stderr, "both cgroup and no-aggregation "
1208 "modes only available in system-wide mode\n");
1210 usage_with_options(stat_usage, options);
1213 if (add_default_attributes())
1216 perf_target__validate(&target);
1218 if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1219 if (perf_target__has_task(&target))
1220 pr_err("Problems finding threads of monitor\n");
1221 if (perf_target__has_cpu(&target))
1222 perror("failed to parse CPUs map");
1224 usage_with_options(stat_usage, options);
1228 list_for_each_entry(pos, &evsel_list->entries, node) {
1229 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1230 perf_evsel__alloc_counts(pos, perf_evsel__nr_cpus(pos)) < 0)
1235 * We dont want to block the signals - that would cause
1236 * child tasks to inherit that and Ctrl-C would not work.
1237 * What we want is for Ctrl-C to work in the exec()-ed
1238 * task, but being ignored by perf stat itself:
1241 signal(SIGINT, skip_signal);
1242 signal(SIGALRM, skip_signal);
1243 signal(SIGABRT, skip_signal);
1246 for (run_idx = 0; run_idx < run_count; run_idx++) {
1247 if (run_count != 1 && verbose)
1248 fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1254 status = run_perf_stat(argc, argv);
1258 print_stat(argc, argv);
1260 list_for_each_entry(pos, &evsel_list->entries, node)
1261 perf_evsel__free_stat_priv(pos);
1262 perf_evlist__delete_maps(evsel_list);
1264 perf_evlist__delete(evsel_list);