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[deliverable/linux.git] / tools / perf / builtin-stat.c
1 /*
2 * builtin-stat.c
3 *
4 * Builtin stat command: Give a precise performance counters summary
5 * overview about any workload, CPU or specific PID.
6 *
7 * Sample output:
8
9 $ perf stat ./hackbench 10
10
11 Time: 0.118
12
13 Performance counter stats for './hackbench 10':
14
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
26
27 0.154822978 seconds time elapsed
28
29 *
30 * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
31 *
32 * Improvements and fixes by:
33 *
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>
40 *
41 * Released under the GPL v2. (and only v2, not any later version)
42 */
43
44 #include "perf.h"
45 #include "builtin.h"
46 #include "util/cgroup.h"
47 #include "util/util.h"
48 #include "util/parse-options.h"
49 #include "util/parse-events.h"
50 #include "util/pmu.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"
61
62 #include <stdlib.h>
63 #include <sys/prctl.h>
64 #include <locale.h>
65
66 #define DEFAULT_SEPARATOR " "
67 #define CNTR_NOT_SUPPORTED "<not supported>"
68 #define CNTR_NOT_COUNTED "<not counted>"
69
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);
74
75 /* Default events used for perf stat -T */
76 static const char *transaction_attrs = {
77 "task-clock,"
78 "{"
79 "instructions,"
80 "cycles,"
81 "cpu/cycles-t/,"
82 "cpu/tx-start/,"
83 "cpu/el-start/,"
84 "cpu/cycles-ct/"
85 "}"
86 };
87
88 /* More limited version when the CPU does not have all events. */
89 static const char * transaction_limited_attrs = {
90 "task-clock,"
91 "{"
92 "instructions,"
93 "cycles,"
94 "cpu/cycles-t/,"
95 "cpu/tx-start/"
96 "}"
97 };
98
99 static struct perf_evlist *evsel_list;
100
101 static struct target target = {
102 .uid = UINT_MAX,
103 };
104
105 static int run_count = 1;
106 static bool no_inherit = false;
107 static bool scale = true;
108 static enum aggr_mode aggr_mode = AGGR_GLOBAL;
109 static volatile pid_t child_pid = -1;
110 static bool null_run = false;
111 static int detailed_run = 0;
112 static bool transaction_run;
113 static bool big_num = true;
114 static int big_num_opt = -1;
115 static const char *csv_sep = NULL;
116 static bool csv_output = false;
117 static bool group = false;
118 static FILE *output = NULL;
119 static const char *pre_cmd = NULL;
120 static const char *post_cmd = NULL;
121 static bool sync_run = false;
122 static unsigned int interval = 0;
123 static unsigned int initial_delay = 0;
124 static unsigned int unit_width = 4; /* strlen("unit") */
125 static bool forever = false;
126 static struct timespec ref_time;
127 static struct cpu_map *aggr_map;
128 static int (*aggr_get_id)(struct cpu_map *m, int cpu);
129
130 static volatile int done = 0;
131
132 static inline void diff_timespec(struct timespec *r, struct timespec *a,
133 struct timespec *b)
134 {
135 r->tv_sec = a->tv_sec - b->tv_sec;
136 if (a->tv_nsec < b->tv_nsec) {
137 r->tv_nsec = a->tv_nsec + 1000000000L - b->tv_nsec;
138 r->tv_sec--;
139 } else {
140 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
141 }
142 }
143
144 static void perf_evsel__reset_stat_priv(struct perf_evsel *evsel)
145 {
146 int i;
147 struct perf_stat *ps = evsel->priv;
148
149 for (i = 0; i < 3; i++)
150 init_stats(&ps->res_stats[i]);
151
152 perf_stat_evsel_id_init(evsel);
153 }
154
155 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
156 {
157 evsel->priv = zalloc(sizeof(struct perf_stat));
158 if (evsel->priv == NULL)
159 return -ENOMEM;
160 perf_evsel__reset_stat_priv(evsel);
161 return 0;
162 }
163
164 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
165 {
166 zfree(&evsel->priv);
167 }
168
169 static int perf_evsel__alloc_prev_raw_counts(struct perf_evsel *evsel)
170 {
171 struct perf_counts *counts;
172
173 counts = perf_counts__new(perf_evsel__nr_cpus(evsel));
174 if (counts)
175 evsel->prev_raw_counts = counts;
176
177 return counts ? 0 : -ENOMEM;
178 }
179
180 static void perf_evsel__free_prev_raw_counts(struct perf_evsel *evsel)
181 {
182 perf_counts__delete(evsel->prev_raw_counts);
183 evsel->prev_raw_counts = NULL;
184 }
185
186 static void perf_evlist__free_stats(struct perf_evlist *evlist)
187 {
188 struct perf_evsel *evsel;
189
190 evlist__for_each(evlist, evsel) {
191 perf_evsel__free_stat_priv(evsel);
192 perf_evsel__free_counts(evsel);
193 perf_evsel__free_prev_raw_counts(evsel);
194 }
195 }
196
197 static int perf_evlist__alloc_stats(struct perf_evlist *evlist, bool alloc_raw)
198 {
199 struct perf_evsel *evsel;
200
201 evlist__for_each(evlist, evsel) {
202 if (perf_evsel__alloc_stat_priv(evsel) < 0 ||
203 perf_evsel__alloc_counts(evsel, perf_evsel__nr_cpus(evsel)) < 0 ||
204 (alloc_raw && perf_evsel__alloc_prev_raw_counts(evsel) < 0))
205 goto out_free;
206 }
207
208 return 0;
209
210 out_free:
211 perf_evlist__free_stats(evlist);
212 return -1;
213 }
214
215 static void perf_stat__reset_stats(struct perf_evlist *evlist)
216 {
217 struct perf_evsel *evsel;
218
219 evlist__for_each(evlist, evsel) {
220 perf_evsel__reset_stat_priv(evsel);
221 perf_evsel__reset_counts(evsel, perf_evsel__nr_cpus(evsel));
222 }
223
224 perf_stat__reset_shadow_stats();
225 }
226
227 static int create_perf_stat_counter(struct perf_evsel *evsel)
228 {
229 struct perf_event_attr *attr = &evsel->attr;
230
231 if (scale)
232 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
233 PERF_FORMAT_TOTAL_TIME_RUNNING;
234
235 attr->inherit = !no_inherit;
236
237 if (target__has_cpu(&target))
238 return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
239
240 if (!target__has_task(&target) && perf_evsel__is_group_leader(evsel)) {
241 attr->disabled = 1;
242 if (!initial_delay)
243 attr->enable_on_exec = 1;
244 }
245
246 return perf_evsel__open_per_thread(evsel, evsel_list->threads);
247 }
248
249 /*
250 * Does the counter have nsecs as a unit?
251 */
252 static inline int nsec_counter(struct perf_evsel *evsel)
253 {
254 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
255 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
256 return 1;
257
258 return 0;
259 }
260
261 static void zero_per_pkg(struct perf_evsel *counter)
262 {
263 if (counter->per_pkg_mask)
264 memset(counter->per_pkg_mask, 0, MAX_NR_CPUS);
265 }
266
267 static int check_per_pkg(struct perf_evsel *counter, int cpu, bool *skip)
268 {
269 unsigned long *mask = counter->per_pkg_mask;
270 struct cpu_map *cpus = perf_evsel__cpus(counter);
271 int s;
272
273 *skip = false;
274
275 if (!counter->per_pkg)
276 return 0;
277
278 if (cpu_map__empty(cpus))
279 return 0;
280
281 if (!mask) {
282 mask = zalloc(MAX_NR_CPUS);
283 if (!mask)
284 return -ENOMEM;
285
286 counter->per_pkg_mask = mask;
287 }
288
289 s = cpu_map__get_socket(cpus, cpu);
290 if (s < 0)
291 return -1;
292
293 *skip = test_and_set_bit(s, mask) == 1;
294 return 0;
295 }
296
297 static int read_cb(struct perf_evsel *evsel, int cpu, int thread __maybe_unused,
298 struct perf_counts_values *count)
299 {
300 struct perf_counts_values *aggr = &evsel->counts->aggr;
301 static struct perf_counts_values zero;
302 bool skip = false;
303
304 if (check_per_pkg(evsel, cpu, &skip)) {
305 pr_err("failed to read per-pkg counter\n");
306 return -1;
307 }
308
309 if (skip)
310 count = &zero;
311
312 switch (aggr_mode) {
313 case AGGR_CORE:
314 case AGGR_SOCKET:
315 case AGGR_NONE:
316 if (!evsel->snapshot)
317 perf_evsel__compute_deltas(evsel, cpu, count);
318 perf_counts_values__scale(count, scale, NULL);
319 evsel->counts->cpu[cpu] = *count;
320 if (aggr_mode == AGGR_NONE)
321 perf_stat__update_shadow_stats(evsel, count->values, cpu);
322 break;
323 case AGGR_GLOBAL:
324 aggr->val += count->val;
325 if (scale) {
326 aggr->ena += count->ena;
327 aggr->run += count->run;
328 }
329 default:
330 break;
331 }
332
333 return 0;
334 }
335
336 static int read_counter(struct perf_evsel *counter);
337
338 /*
339 * Read out the results of a single counter:
340 * aggregate counts across CPUs in system-wide mode
341 */
342 static int read_counter_aggr(struct perf_evsel *counter)
343 {
344 struct perf_counts_values *aggr = &counter->counts->aggr;
345 struct perf_stat *ps = counter->priv;
346 u64 *count = counter->counts->aggr.values;
347 int i;
348
349 aggr->val = aggr->ena = aggr->run = 0;
350
351 if (read_counter(counter))
352 return -1;
353
354 if (!counter->snapshot)
355 perf_evsel__compute_deltas(counter, -1, aggr);
356 perf_counts_values__scale(aggr, scale, &counter->counts->scaled);
357
358 for (i = 0; i < 3; i++)
359 update_stats(&ps->res_stats[i], count[i]);
360
361 if (verbose) {
362 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
363 perf_evsel__name(counter), count[0], count[1], count[2]);
364 }
365
366 /*
367 * Save the full runtime - to allow normalization during printout:
368 */
369 perf_stat__update_shadow_stats(counter, count, 0);
370
371 return 0;
372 }
373
374 /*
375 * Read out the results of a single counter:
376 * do not aggregate counts across CPUs in system-wide mode
377 */
378 static int read_counter(struct perf_evsel *counter)
379 {
380 int nthreads = thread_map__nr(evsel_list->threads);
381 int ncpus = perf_evsel__nr_cpus(counter);
382 int cpu, thread;
383
384 if (!counter->supported)
385 return -ENOENT;
386
387 if (counter->system_wide)
388 nthreads = 1;
389
390 if (counter->per_pkg)
391 zero_per_pkg(counter);
392
393 for (thread = 0; thread < nthreads; thread++) {
394 for (cpu = 0; cpu < ncpus; cpu++) {
395 if (perf_evsel__read_cb(counter, cpu, thread, read_cb))
396 return -1;
397 }
398 }
399
400 return 0;
401 }
402
403 static void print_interval(void)
404 {
405 static int num_print_interval;
406 struct perf_evsel *counter;
407 struct perf_stat *ps;
408 struct timespec ts, rs;
409 char prefix[64];
410
411 if (aggr_mode == AGGR_GLOBAL) {
412 evlist__for_each(evsel_list, counter) {
413 ps = counter->priv;
414 memset(ps->res_stats, 0, sizeof(ps->res_stats));
415 read_counter_aggr(counter);
416 }
417 } else {
418 evlist__for_each(evsel_list, counter) {
419 ps = counter->priv;
420 memset(ps->res_stats, 0, sizeof(ps->res_stats));
421 read_counter(counter);
422 }
423 }
424
425 clock_gettime(CLOCK_MONOTONIC, &ts);
426 diff_timespec(&rs, &ts, &ref_time);
427 sprintf(prefix, "%6lu.%09lu%s", rs.tv_sec, rs.tv_nsec, csv_sep);
428
429 if (num_print_interval == 0 && !csv_output) {
430 switch (aggr_mode) {
431 case AGGR_SOCKET:
432 fprintf(output, "# time socket cpus counts %*s events\n", unit_width, "unit");
433 break;
434 case AGGR_CORE:
435 fprintf(output, "# time core cpus counts %*s events\n", unit_width, "unit");
436 break;
437 case AGGR_NONE:
438 fprintf(output, "# time CPU counts %*s events\n", unit_width, "unit");
439 break;
440 case AGGR_GLOBAL:
441 default:
442 fprintf(output, "# time counts %*s events\n", unit_width, "unit");
443 }
444 }
445
446 if (++num_print_interval == 25)
447 num_print_interval = 0;
448
449 switch (aggr_mode) {
450 case AGGR_CORE:
451 case AGGR_SOCKET:
452 print_aggr(prefix);
453 break;
454 case AGGR_NONE:
455 evlist__for_each(evsel_list, counter)
456 print_counter(counter, prefix);
457 break;
458 case AGGR_GLOBAL:
459 default:
460 evlist__for_each(evsel_list, counter)
461 print_counter_aggr(counter, prefix);
462 }
463
464 fflush(output);
465 }
466
467 static void handle_initial_delay(void)
468 {
469 struct perf_evsel *counter;
470
471 if (initial_delay) {
472 const int ncpus = cpu_map__nr(evsel_list->cpus),
473 nthreads = thread_map__nr(evsel_list->threads);
474
475 usleep(initial_delay * 1000);
476 evlist__for_each(evsel_list, counter)
477 perf_evsel__enable(counter, ncpus, nthreads);
478 }
479 }
480
481 static volatile int workload_exec_errno;
482
483 /*
484 * perf_evlist__prepare_workload will send a SIGUSR1
485 * if the fork fails, since we asked by setting its
486 * want_signal to true.
487 */
488 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
489 void *ucontext __maybe_unused)
490 {
491 workload_exec_errno = info->si_value.sival_int;
492 }
493
494 static int __run_perf_stat(int argc, const char **argv)
495 {
496 char msg[512];
497 unsigned long long t0, t1;
498 struct perf_evsel *counter;
499 struct timespec ts;
500 size_t l;
501 int status = 0;
502 const bool forks = (argc > 0);
503
504 if (interval) {
505 ts.tv_sec = interval / 1000;
506 ts.tv_nsec = (interval % 1000) * 1000000;
507 } else {
508 ts.tv_sec = 1;
509 ts.tv_nsec = 0;
510 }
511
512 if (forks) {
513 if (perf_evlist__prepare_workload(evsel_list, &target, argv, false,
514 workload_exec_failed_signal) < 0) {
515 perror("failed to prepare workload");
516 return -1;
517 }
518 child_pid = evsel_list->workload.pid;
519 }
520
521 if (group)
522 perf_evlist__set_leader(evsel_list);
523
524 evlist__for_each(evsel_list, counter) {
525 if (create_perf_stat_counter(counter) < 0) {
526 /*
527 * PPC returns ENXIO for HW counters until 2.6.37
528 * (behavior changed with commit b0a873e).
529 */
530 if (errno == EINVAL || errno == ENOSYS ||
531 errno == ENOENT || errno == EOPNOTSUPP ||
532 errno == ENXIO) {
533 if (verbose)
534 ui__warning("%s event is not supported by the kernel.\n",
535 perf_evsel__name(counter));
536 counter->supported = false;
537
538 if ((counter->leader != counter) ||
539 !(counter->leader->nr_members > 1))
540 continue;
541 }
542
543 perf_evsel__open_strerror(counter, &target,
544 errno, msg, sizeof(msg));
545 ui__error("%s\n", msg);
546
547 if (child_pid != -1)
548 kill(child_pid, SIGTERM);
549
550 return -1;
551 }
552 counter->supported = true;
553
554 l = strlen(counter->unit);
555 if (l > unit_width)
556 unit_width = l;
557 }
558
559 if (perf_evlist__apply_filters(evsel_list, &counter)) {
560 error("failed to set filter \"%s\" on event %s with %d (%s)\n",
561 counter->filter, perf_evsel__name(counter), errno,
562 strerror_r(errno, msg, sizeof(msg)));
563 return -1;
564 }
565
566 /*
567 * Enable counters and exec the command:
568 */
569 t0 = rdclock();
570 clock_gettime(CLOCK_MONOTONIC, &ref_time);
571
572 if (forks) {
573 perf_evlist__start_workload(evsel_list);
574 handle_initial_delay();
575
576 if (interval) {
577 while (!waitpid(child_pid, &status, WNOHANG)) {
578 nanosleep(&ts, NULL);
579 print_interval();
580 }
581 }
582 wait(&status);
583
584 if (workload_exec_errno) {
585 const char *emsg = strerror_r(workload_exec_errno, msg, sizeof(msg));
586 pr_err("Workload failed: %s\n", emsg);
587 return -1;
588 }
589
590 if (WIFSIGNALED(status))
591 psignal(WTERMSIG(status), argv[0]);
592 } else {
593 handle_initial_delay();
594 while (!done) {
595 nanosleep(&ts, NULL);
596 if (interval)
597 print_interval();
598 }
599 }
600
601 t1 = rdclock();
602
603 update_stats(&walltime_nsecs_stats, t1 - t0);
604
605 if (aggr_mode == AGGR_GLOBAL) {
606 evlist__for_each(evsel_list, counter) {
607 read_counter_aggr(counter);
608 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
609 thread_map__nr(evsel_list->threads));
610 }
611 } else {
612 evlist__for_each(evsel_list, counter) {
613 read_counter(counter);
614 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
615 }
616 }
617
618 return WEXITSTATUS(status);
619 }
620
621 static int run_perf_stat(int argc, const char **argv)
622 {
623 int ret;
624
625 if (pre_cmd) {
626 ret = system(pre_cmd);
627 if (ret)
628 return ret;
629 }
630
631 if (sync_run)
632 sync();
633
634 ret = __run_perf_stat(argc, argv);
635 if (ret)
636 return ret;
637
638 if (post_cmd) {
639 ret = system(post_cmd);
640 if (ret)
641 return ret;
642 }
643
644 return ret;
645 }
646
647 static void print_running(u64 run, u64 ena)
648 {
649 if (csv_output) {
650 fprintf(output, "%s%" PRIu64 "%s%.2f",
651 csv_sep,
652 run,
653 csv_sep,
654 ena ? 100.0 * run / ena : 100.0);
655 } else if (run != ena) {
656 fprintf(output, " (%.2f%%)", 100.0 * run / ena);
657 }
658 }
659
660 static void print_noise_pct(double total, double avg)
661 {
662 double pct = rel_stddev_stats(total, avg);
663
664 if (csv_output)
665 fprintf(output, "%s%.2f%%", csv_sep, pct);
666 else if (pct)
667 fprintf(output, " ( +-%6.2f%% )", pct);
668 }
669
670 static void print_noise(struct perf_evsel *evsel, double avg)
671 {
672 struct perf_stat *ps;
673
674 if (run_count == 1)
675 return;
676
677 ps = evsel->priv;
678 print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
679 }
680
681 static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
682 {
683 switch (aggr_mode) {
684 case AGGR_CORE:
685 fprintf(output, "S%d-C%*d%s%*d%s",
686 cpu_map__id_to_socket(id),
687 csv_output ? 0 : -8,
688 cpu_map__id_to_cpu(id),
689 csv_sep,
690 csv_output ? 0 : 4,
691 nr,
692 csv_sep);
693 break;
694 case AGGR_SOCKET:
695 fprintf(output, "S%*d%s%*d%s",
696 csv_output ? 0 : -5,
697 id,
698 csv_sep,
699 csv_output ? 0 : 4,
700 nr,
701 csv_sep);
702 break;
703 case AGGR_NONE:
704 fprintf(output, "CPU%*d%s",
705 csv_output ? 0 : -4,
706 perf_evsel__cpus(evsel)->map[id], csv_sep);
707 break;
708 case AGGR_GLOBAL:
709 default:
710 break;
711 }
712 }
713
714 static void nsec_printout(int id, int nr, struct perf_evsel *evsel, double avg)
715 {
716 double msecs = avg / 1e6;
717 const char *fmt_v, *fmt_n;
718 char name[25];
719
720 fmt_v = csv_output ? "%.6f%s" : "%18.6f%s";
721 fmt_n = csv_output ? "%s" : "%-25s";
722
723 aggr_printout(evsel, id, nr);
724
725 scnprintf(name, sizeof(name), "%s%s",
726 perf_evsel__name(evsel), csv_output ? "" : " (msec)");
727
728 fprintf(output, fmt_v, msecs, csv_sep);
729
730 if (csv_output)
731 fprintf(output, "%s%s", evsel->unit, csv_sep);
732 else
733 fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep);
734
735 fprintf(output, fmt_n, name);
736
737 if (evsel->cgrp)
738 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
739
740 if (csv_output || interval)
741 return;
742
743 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
744 fprintf(output, " # %8.3f CPUs utilized ",
745 avg / avg_stats(&walltime_nsecs_stats));
746 else
747 fprintf(output, " ");
748 }
749
750 static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
751 {
752 double sc = evsel->scale;
753 const char *fmt;
754 int cpu = cpu_map__id_to_cpu(id);
755
756 if (csv_output) {
757 fmt = sc != 1.0 ? "%.2f%s" : "%.0f%s";
758 } else {
759 if (big_num)
760 fmt = sc != 1.0 ? "%'18.2f%s" : "%'18.0f%s";
761 else
762 fmt = sc != 1.0 ? "%18.2f%s" : "%18.0f%s";
763 }
764
765 aggr_printout(evsel, id, nr);
766
767 if (aggr_mode == AGGR_GLOBAL)
768 cpu = 0;
769
770 fprintf(output, fmt, avg, csv_sep);
771
772 if (evsel->unit)
773 fprintf(output, "%-*s%s",
774 csv_output ? 0 : unit_width,
775 evsel->unit, csv_sep);
776
777 fprintf(output, "%-*s", csv_output ? 0 : 25, perf_evsel__name(evsel));
778
779 if (evsel->cgrp)
780 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
781
782 if (csv_output || interval)
783 return;
784
785 perf_stat__print_shadow_stats(output, evsel, avg, cpu, aggr_mode);
786 }
787
788 static void print_aggr(char *prefix)
789 {
790 struct perf_evsel *counter;
791 int cpu, cpu2, s, s2, id, nr;
792 double uval;
793 u64 ena, run, val;
794
795 if (!(aggr_map || aggr_get_id))
796 return;
797
798 for (s = 0; s < aggr_map->nr; s++) {
799 id = aggr_map->map[s];
800 evlist__for_each(evsel_list, counter) {
801 val = ena = run = 0;
802 nr = 0;
803 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
804 cpu2 = perf_evsel__cpus(counter)->map[cpu];
805 s2 = aggr_get_id(evsel_list->cpus, cpu2);
806 if (s2 != id)
807 continue;
808 val += counter->counts->cpu[cpu].val;
809 ena += counter->counts->cpu[cpu].ena;
810 run += counter->counts->cpu[cpu].run;
811 nr++;
812 }
813 if (prefix)
814 fprintf(output, "%s", prefix);
815
816 if (run == 0 || ena == 0) {
817 aggr_printout(counter, id, nr);
818
819 fprintf(output, "%*s%s",
820 csv_output ? 0 : 18,
821 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
822 csv_sep);
823
824 fprintf(output, "%-*s%s",
825 csv_output ? 0 : unit_width,
826 counter->unit, csv_sep);
827
828 fprintf(output, "%*s",
829 csv_output ? 0 : -25,
830 perf_evsel__name(counter));
831
832 if (counter->cgrp)
833 fprintf(output, "%s%s",
834 csv_sep, counter->cgrp->name);
835
836 print_running(run, ena);
837 fputc('\n', output);
838 continue;
839 }
840 uval = val * counter->scale;
841
842 if (nsec_counter(counter))
843 nsec_printout(id, nr, counter, uval);
844 else
845 abs_printout(id, nr, counter, uval);
846
847 if (!csv_output)
848 print_noise(counter, 1.0);
849
850 print_running(run, ena);
851 fputc('\n', output);
852 }
853 }
854 }
855
856 /*
857 * Print out the results of a single counter:
858 * aggregated counts in system-wide mode
859 */
860 static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
861 {
862 struct perf_stat *ps = counter->priv;
863 double avg = avg_stats(&ps->res_stats[0]);
864 int scaled = counter->counts->scaled;
865 double uval;
866 double avg_enabled, avg_running;
867
868 avg_enabled = avg_stats(&ps->res_stats[1]);
869 avg_running = avg_stats(&ps->res_stats[2]);
870
871 if (prefix)
872 fprintf(output, "%s", prefix);
873
874 if (scaled == -1 || !counter->supported) {
875 fprintf(output, "%*s%s",
876 csv_output ? 0 : 18,
877 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
878 csv_sep);
879 fprintf(output, "%-*s%s",
880 csv_output ? 0 : unit_width,
881 counter->unit, csv_sep);
882 fprintf(output, "%*s",
883 csv_output ? 0 : -25,
884 perf_evsel__name(counter));
885
886 if (counter->cgrp)
887 fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
888
889 print_running(avg_running, avg_enabled);
890 fputc('\n', output);
891 return;
892 }
893
894 uval = avg * counter->scale;
895
896 if (nsec_counter(counter))
897 nsec_printout(-1, 0, counter, uval);
898 else
899 abs_printout(-1, 0, counter, uval);
900
901 print_noise(counter, avg);
902
903 print_running(avg_running, avg_enabled);
904 fprintf(output, "\n");
905 }
906
907 /*
908 * Print out the results of a single counter:
909 * does not use aggregated count in system-wide
910 */
911 static void print_counter(struct perf_evsel *counter, char *prefix)
912 {
913 u64 ena, run, val;
914 double uval;
915 int cpu;
916
917 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
918 val = counter->counts->cpu[cpu].val;
919 ena = counter->counts->cpu[cpu].ena;
920 run = counter->counts->cpu[cpu].run;
921
922 if (prefix)
923 fprintf(output, "%s", prefix);
924
925 if (run == 0 || ena == 0) {
926 fprintf(output, "CPU%*d%s%*s%s",
927 csv_output ? 0 : -4,
928 perf_evsel__cpus(counter)->map[cpu], csv_sep,
929 csv_output ? 0 : 18,
930 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
931 csv_sep);
932
933 fprintf(output, "%-*s%s",
934 csv_output ? 0 : unit_width,
935 counter->unit, csv_sep);
936
937 fprintf(output, "%*s",
938 csv_output ? 0 : -25,
939 perf_evsel__name(counter));
940
941 if (counter->cgrp)
942 fprintf(output, "%s%s",
943 csv_sep, counter->cgrp->name);
944
945 print_running(run, ena);
946 fputc('\n', output);
947 continue;
948 }
949
950 uval = val * counter->scale;
951
952 if (nsec_counter(counter))
953 nsec_printout(cpu, 0, counter, uval);
954 else
955 abs_printout(cpu, 0, counter, uval);
956
957 if (!csv_output)
958 print_noise(counter, 1.0);
959 print_running(run, ena);
960
961 fputc('\n', output);
962 }
963 }
964
965 static void print_stat(int argc, const char **argv)
966 {
967 struct perf_evsel *counter;
968 int i;
969
970 fflush(stdout);
971
972 if (!csv_output) {
973 fprintf(output, "\n");
974 fprintf(output, " Performance counter stats for ");
975 if (target.system_wide)
976 fprintf(output, "\'system wide");
977 else if (target.cpu_list)
978 fprintf(output, "\'CPU(s) %s", target.cpu_list);
979 else if (!target__has_task(&target)) {
980 fprintf(output, "\'%s", argv[0]);
981 for (i = 1; i < argc; i++)
982 fprintf(output, " %s", argv[i]);
983 } else if (target.pid)
984 fprintf(output, "process id \'%s", target.pid);
985 else
986 fprintf(output, "thread id \'%s", target.tid);
987
988 fprintf(output, "\'");
989 if (run_count > 1)
990 fprintf(output, " (%d runs)", run_count);
991 fprintf(output, ":\n\n");
992 }
993
994 switch (aggr_mode) {
995 case AGGR_CORE:
996 case AGGR_SOCKET:
997 print_aggr(NULL);
998 break;
999 case AGGR_GLOBAL:
1000 evlist__for_each(evsel_list, counter)
1001 print_counter_aggr(counter, NULL);
1002 break;
1003 case AGGR_NONE:
1004 evlist__for_each(evsel_list, counter)
1005 print_counter(counter, NULL);
1006 break;
1007 default:
1008 break;
1009 }
1010
1011 if (!csv_output) {
1012 if (!null_run)
1013 fprintf(output, "\n");
1014 fprintf(output, " %17.9f seconds time elapsed",
1015 avg_stats(&walltime_nsecs_stats)/1e9);
1016 if (run_count > 1) {
1017 fprintf(output, " ");
1018 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1019 avg_stats(&walltime_nsecs_stats));
1020 }
1021 fprintf(output, "\n\n");
1022 }
1023 }
1024
1025 static volatile int signr = -1;
1026
1027 static void skip_signal(int signo)
1028 {
1029 if ((child_pid == -1) || interval)
1030 done = 1;
1031
1032 signr = signo;
1033 /*
1034 * render child_pid harmless
1035 * won't send SIGTERM to a random
1036 * process in case of race condition
1037 * and fast PID recycling
1038 */
1039 child_pid = -1;
1040 }
1041
1042 static void sig_atexit(void)
1043 {
1044 sigset_t set, oset;
1045
1046 /*
1047 * avoid race condition with SIGCHLD handler
1048 * in skip_signal() which is modifying child_pid
1049 * goal is to avoid send SIGTERM to a random
1050 * process
1051 */
1052 sigemptyset(&set);
1053 sigaddset(&set, SIGCHLD);
1054 sigprocmask(SIG_BLOCK, &set, &oset);
1055
1056 if (child_pid != -1)
1057 kill(child_pid, SIGTERM);
1058
1059 sigprocmask(SIG_SETMASK, &oset, NULL);
1060
1061 if (signr == -1)
1062 return;
1063
1064 signal(signr, SIG_DFL);
1065 kill(getpid(), signr);
1066 }
1067
1068 static int stat__set_big_num(const struct option *opt __maybe_unused,
1069 const char *s __maybe_unused, int unset)
1070 {
1071 big_num_opt = unset ? 0 : 1;
1072 return 0;
1073 }
1074
1075 static int perf_stat_init_aggr_mode(void)
1076 {
1077 switch (aggr_mode) {
1078 case AGGR_SOCKET:
1079 if (cpu_map__build_socket_map(evsel_list->cpus, &aggr_map)) {
1080 perror("cannot build socket map");
1081 return -1;
1082 }
1083 aggr_get_id = cpu_map__get_socket;
1084 break;
1085 case AGGR_CORE:
1086 if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
1087 perror("cannot build core map");
1088 return -1;
1089 }
1090 aggr_get_id = cpu_map__get_core;
1091 break;
1092 case AGGR_NONE:
1093 case AGGR_GLOBAL:
1094 default:
1095 break;
1096 }
1097 return 0;
1098 }
1099
1100 /*
1101 * Add default attributes, if there were no attributes specified or
1102 * if -d/--detailed, -d -d or -d -d -d is used:
1103 */
1104 static int add_default_attributes(void)
1105 {
1106 struct perf_event_attr default_attrs[] = {
1107
1108 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
1109 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
1110 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
1111 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
1112
1113 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
1114 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1115 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
1116 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
1117 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
1118 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
1119
1120 };
1121
1122 /*
1123 * Detailed stats (-d), covering the L1 and last level data caches:
1124 */
1125 struct perf_event_attr detailed_attrs[] = {
1126
1127 { .type = PERF_TYPE_HW_CACHE,
1128 .config =
1129 PERF_COUNT_HW_CACHE_L1D << 0 |
1130 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1131 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1132
1133 { .type = PERF_TYPE_HW_CACHE,
1134 .config =
1135 PERF_COUNT_HW_CACHE_L1D << 0 |
1136 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1137 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1138
1139 { .type = PERF_TYPE_HW_CACHE,
1140 .config =
1141 PERF_COUNT_HW_CACHE_LL << 0 |
1142 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1143 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1144
1145 { .type = PERF_TYPE_HW_CACHE,
1146 .config =
1147 PERF_COUNT_HW_CACHE_LL << 0 |
1148 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1149 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1150 };
1151
1152 /*
1153 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1154 */
1155 struct perf_event_attr very_detailed_attrs[] = {
1156
1157 { .type = PERF_TYPE_HW_CACHE,
1158 .config =
1159 PERF_COUNT_HW_CACHE_L1I << 0 |
1160 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1161 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1162
1163 { .type = PERF_TYPE_HW_CACHE,
1164 .config =
1165 PERF_COUNT_HW_CACHE_L1I << 0 |
1166 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1167 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1168
1169 { .type = PERF_TYPE_HW_CACHE,
1170 .config =
1171 PERF_COUNT_HW_CACHE_DTLB << 0 |
1172 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1173 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1174
1175 { .type = PERF_TYPE_HW_CACHE,
1176 .config =
1177 PERF_COUNT_HW_CACHE_DTLB << 0 |
1178 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1179 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1180
1181 { .type = PERF_TYPE_HW_CACHE,
1182 .config =
1183 PERF_COUNT_HW_CACHE_ITLB << 0 |
1184 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1185 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1186
1187 { .type = PERF_TYPE_HW_CACHE,
1188 .config =
1189 PERF_COUNT_HW_CACHE_ITLB << 0 |
1190 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1191 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1192
1193 };
1194
1195 /*
1196 * Very, very detailed stats (-d -d -d), adding prefetch events:
1197 */
1198 struct perf_event_attr very_very_detailed_attrs[] = {
1199
1200 { .type = PERF_TYPE_HW_CACHE,
1201 .config =
1202 PERF_COUNT_HW_CACHE_L1D << 0 |
1203 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1204 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1205
1206 { .type = PERF_TYPE_HW_CACHE,
1207 .config =
1208 PERF_COUNT_HW_CACHE_L1D << 0 |
1209 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1210 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1211 };
1212
1213 /* Set attrs if no event is selected and !null_run: */
1214 if (null_run)
1215 return 0;
1216
1217 if (transaction_run) {
1218 int err;
1219 if (pmu_have_event("cpu", "cycles-ct") &&
1220 pmu_have_event("cpu", "el-start"))
1221 err = parse_events(evsel_list, transaction_attrs, NULL);
1222 else
1223 err = parse_events(evsel_list, transaction_limited_attrs, NULL);
1224 if (err) {
1225 fprintf(stderr, "Cannot set up transaction events\n");
1226 return -1;
1227 }
1228 return 0;
1229 }
1230
1231 if (!evsel_list->nr_entries) {
1232 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1233 return -1;
1234 }
1235
1236 /* Detailed events get appended to the event list: */
1237
1238 if (detailed_run < 1)
1239 return 0;
1240
1241 /* Append detailed run extra attributes: */
1242 if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1243 return -1;
1244
1245 if (detailed_run < 2)
1246 return 0;
1247
1248 /* Append very detailed run extra attributes: */
1249 if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1250 return -1;
1251
1252 if (detailed_run < 3)
1253 return 0;
1254
1255 /* Append very, very detailed run extra attributes: */
1256 return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1257 }
1258
1259 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
1260 {
1261 bool append_file = false;
1262 int output_fd = 0;
1263 const char *output_name = NULL;
1264 const struct option options[] = {
1265 OPT_BOOLEAN('T', "transaction", &transaction_run,
1266 "hardware transaction statistics"),
1267 OPT_CALLBACK('e', "event", &evsel_list, "event",
1268 "event selector. use 'perf list' to list available events",
1269 parse_events_option),
1270 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1271 "event filter", parse_filter),
1272 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1273 "child tasks do not inherit counters"),
1274 OPT_STRING('p', "pid", &target.pid, "pid",
1275 "stat events on existing process id"),
1276 OPT_STRING('t', "tid", &target.tid, "tid",
1277 "stat events on existing thread id"),
1278 OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1279 "system-wide collection from all CPUs"),
1280 OPT_BOOLEAN('g', "group", &group,
1281 "put the counters into a counter group"),
1282 OPT_BOOLEAN('c', "scale", &scale, "scale/normalize counters"),
1283 OPT_INCR('v', "verbose", &verbose,
1284 "be more verbose (show counter open errors, etc)"),
1285 OPT_INTEGER('r', "repeat", &run_count,
1286 "repeat command and print average + stddev (max: 100, forever: 0)"),
1287 OPT_BOOLEAN('n', "null", &null_run,
1288 "null run - dont start any counters"),
1289 OPT_INCR('d', "detailed", &detailed_run,
1290 "detailed run - start a lot of events"),
1291 OPT_BOOLEAN('S', "sync", &sync_run,
1292 "call sync() before starting a run"),
1293 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1294 "print large numbers with thousands\' separators",
1295 stat__set_big_num),
1296 OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1297 "list of cpus to monitor in system-wide"),
1298 OPT_SET_UINT('A', "no-aggr", &aggr_mode,
1299 "disable CPU count aggregation", AGGR_NONE),
1300 OPT_STRING('x', "field-separator", &csv_sep, "separator",
1301 "print counts with custom separator"),
1302 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1303 "monitor event in cgroup name only", parse_cgroups),
1304 OPT_STRING('o', "output", &output_name, "file", "output file name"),
1305 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1306 OPT_INTEGER(0, "log-fd", &output_fd,
1307 "log output to fd, instead of stderr"),
1308 OPT_STRING(0, "pre", &pre_cmd, "command",
1309 "command to run prior to the measured command"),
1310 OPT_STRING(0, "post", &post_cmd, "command",
1311 "command to run after to the measured command"),
1312 OPT_UINTEGER('I', "interval-print", &interval,
1313 "print counts at regular interval in ms (>= 100)"),
1314 OPT_SET_UINT(0, "per-socket", &aggr_mode,
1315 "aggregate counts per processor socket", AGGR_SOCKET),
1316 OPT_SET_UINT(0, "per-core", &aggr_mode,
1317 "aggregate counts per physical processor core", AGGR_CORE),
1318 OPT_UINTEGER('D', "delay", &initial_delay,
1319 "ms to wait before starting measurement after program start"),
1320 OPT_END()
1321 };
1322 const char * const stat_usage[] = {
1323 "perf stat [<options>] [<command>]",
1324 NULL
1325 };
1326 int status = -EINVAL, run_idx;
1327 const char *mode;
1328
1329 setlocale(LC_ALL, "");
1330
1331 evsel_list = perf_evlist__new();
1332 if (evsel_list == NULL)
1333 return -ENOMEM;
1334
1335 argc = parse_options(argc, argv, options, stat_usage,
1336 PARSE_OPT_STOP_AT_NON_OPTION);
1337
1338 output = stderr;
1339 if (output_name && strcmp(output_name, "-"))
1340 output = NULL;
1341
1342 if (output_name && output_fd) {
1343 fprintf(stderr, "cannot use both --output and --log-fd\n");
1344 parse_options_usage(stat_usage, options, "o", 1);
1345 parse_options_usage(NULL, options, "log-fd", 0);
1346 goto out;
1347 }
1348
1349 if (output_fd < 0) {
1350 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1351 parse_options_usage(stat_usage, options, "log-fd", 0);
1352 goto out;
1353 }
1354
1355 if (!output) {
1356 struct timespec tm;
1357 mode = append_file ? "a" : "w";
1358
1359 output = fopen(output_name, mode);
1360 if (!output) {
1361 perror("failed to create output file");
1362 return -1;
1363 }
1364 clock_gettime(CLOCK_REALTIME, &tm);
1365 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1366 } else if (output_fd > 0) {
1367 mode = append_file ? "a" : "w";
1368 output = fdopen(output_fd, mode);
1369 if (!output) {
1370 perror("Failed opening logfd");
1371 return -errno;
1372 }
1373 }
1374
1375 if (csv_sep) {
1376 csv_output = true;
1377 if (!strcmp(csv_sep, "\\t"))
1378 csv_sep = "\t";
1379 } else
1380 csv_sep = DEFAULT_SEPARATOR;
1381
1382 /*
1383 * let the spreadsheet do the pretty-printing
1384 */
1385 if (csv_output) {
1386 /* User explicitly passed -B? */
1387 if (big_num_opt == 1) {
1388 fprintf(stderr, "-B option not supported with -x\n");
1389 parse_options_usage(stat_usage, options, "B", 1);
1390 parse_options_usage(NULL, options, "x", 1);
1391 goto out;
1392 } else /* Nope, so disable big number formatting */
1393 big_num = false;
1394 } else if (big_num_opt == 0) /* User passed --no-big-num */
1395 big_num = false;
1396
1397 if (!argc && target__none(&target))
1398 usage_with_options(stat_usage, options);
1399
1400 if (run_count < 0) {
1401 pr_err("Run count must be a positive number\n");
1402 parse_options_usage(stat_usage, options, "r", 1);
1403 goto out;
1404 } else if (run_count == 0) {
1405 forever = true;
1406 run_count = 1;
1407 }
1408
1409 /* no_aggr, cgroup are for system-wide only */
1410 if ((aggr_mode != AGGR_GLOBAL || nr_cgroups) &&
1411 !target__has_cpu(&target)) {
1412 fprintf(stderr, "both cgroup and no-aggregation "
1413 "modes only available in system-wide mode\n");
1414
1415 parse_options_usage(stat_usage, options, "G", 1);
1416 parse_options_usage(NULL, options, "A", 1);
1417 parse_options_usage(NULL, options, "a", 1);
1418 goto out;
1419 }
1420
1421 if (add_default_attributes())
1422 goto out;
1423
1424 target__validate(&target);
1425
1426 if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1427 if (target__has_task(&target)) {
1428 pr_err("Problems finding threads of monitor\n");
1429 parse_options_usage(stat_usage, options, "p", 1);
1430 parse_options_usage(NULL, options, "t", 1);
1431 } else if (target__has_cpu(&target)) {
1432 perror("failed to parse CPUs map");
1433 parse_options_usage(stat_usage, options, "C", 1);
1434 parse_options_usage(NULL, options, "a", 1);
1435 }
1436 goto out;
1437 }
1438 if (interval && interval < 100) {
1439 pr_err("print interval must be >= 100ms\n");
1440 parse_options_usage(stat_usage, options, "I", 1);
1441 goto out;
1442 }
1443
1444 if (perf_evlist__alloc_stats(evsel_list, interval))
1445 goto out;
1446
1447 if (perf_stat_init_aggr_mode())
1448 goto out;
1449
1450 /*
1451 * We dont want to block the signals - that would cause
1452 * child tasks to inherit that and Ctrl-C would not work.
1453 * What we want is for Ctrl-C to work in the exec()-ed
1454 * task, but being ignored by perf stat itself:
1455 */
1456 atexit(sig_atexit);
1457 if (!forever)
1458 signal(SIGINT, skip_signal);
1459 signal(SIGCHLD, skip_signal);
1460 signal(SIGALRM, skip_signal);
1461 signal(SIGABRT, skip_signal);
1462
1463 status = 0;
1464 for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
1465 if (run_count != 1 && verbose)
1466 fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1467 run_idx + 1);
1468
1469 status = run_perf_stat(argc, argv);
1470 if (forever && status != -1) {
1471 print_stat(argc, argv);
1472 perf_stat__reset_stats(evsel_list);
1473 }
1474 }
1475
1476 if (!forever && status != -1 && !interval)
1477 print_stat(argc, argv);
1478
1479 perf_evlist__free_stats(evsel_list);
1480 out:
1481 perf_evlist__delete(evsel_list);
1482 return status;
1483 }
Linux kernel - Deliverables
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