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perf tools: Refactor cpumap to hold nr and the map
[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 Time: 0.104
11
12 Performance counter stats for '/home/mingo/hackbench':
13
14 1255.538611 task clock ticks # 10.143 CPU utilization factor
15 54011 context switches # 0.043 M/sec
16 385 CPU migrations # 0.000 M/sec
17 17755 pagefaults # 0.014 M/sec
18 3808323185 CPU cycles # 3033.219 M/sec
19 1575111190 instructions # 1254.530 M/sec
20 17367895 cache references # 13.833 M/sec
21 7674421 cache misses # 6.112 M/sec
22
23 Wall-clock time elapsed: 123.786620 msecs
24
25 *
26 * Copyright (C) 2008, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
27 *
28 * Improvements and fixes by:
29 *
30 * Arjan van de Ven <arjan@linux.intel.com>
31 * Yanmin Zhang <yanmin.zhang@intel.com>
32 * Wu Fengguang <fengguang.wu@intel.com>
33 * Mike Galbraith <efault@gmx.de>
34 * Paul Mackerras <paulus@samba.org>
35 * Jaswinder Singh Rajput <jaswinder@kernel.org>
36 *
37 * Released under the GPL v2. (and only v2, not any later version)
38 */
39
40 #include "perf.h"
41 #include "builtin.h"
42 #include "util/util.h"
43 #include "util/parse-options.h"
44 #include "util/parse-events.h"
45 #include "util/event.h"
46 #include "util/evsel.h"
47 #include "util/debug.h"
48 #include "util/header.h"
49 #include "util/cpumap.h"
50 #include "util/thread.h"
51
52 #include <sys/prctl.h>
53 #include <math.h>
54 #include <locale.h>
55
56 #define DEFAULT_SEPARATOR " "
57
58 static struct perf_event_attr default_attrs[] = {
59
60 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
61 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
62 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
63 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
64
65 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
66 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
67 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
68 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
69 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES },
70 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES },
71
72 };
73
74 static bool system_wide = false;
75 static struct cpu_map *cpus;
76 static int run_idx = 0;
77
78 static int run_count = 1;
79 static bool no_inherit = false;
80 static bool scale = true;
81 static bool no_aggr = false;
82 static pid_t target_pid = -1;
83 static pid_t target_tid = -1;
84 static pid_t *all_tids = NULL;
85 static int thread_num = 0;
86 static pid_t child_pid = -1;
87 static bool null_run = false;
88 static bool big_num = true;
89 static int big_num_opt = -1;
90 static const char *cpu_list;
91 static const char *csv_sep = NULL;
92 static bool csv_output = false;
93
94 static volatile int done = 0;
95
96 struct stats
97 {
98 double n, mean, M2;
99 };
100
101 struct perf_stat {
102 struct stats res_stats[3];
103 };
104
105 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
106 {
107 evsel->priv = zalloc(sizeof(struct perf_stat));
108 return evsel->priv == NULL ? -ENOMEM : 0;
109 }
110
111 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
112 {
113 free(evsel->priv);
114 evsel->priv = NULL;
115 }
116
117 static void update_stats(struct stats *stats, u64 val)
118 {
119 double delta;
120
121 stats->n++;
122 delta = val - stats->mean;
123 stats->mean += delta / stats->n;
124 stats->M2 += delta*(val - stats->mean);
125 }
126
127 static double avg_stats(struct stats *stats)
128 {
129 return stats->mean;
130 }
131
132 /*
133 * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
134 *
135 * (\Sum n_i^2) - ((\Sum n_i)^2)/n
136 * s^2 = -------------------------------
137 * n - 1
138 *
139 * http://en.wikipedia.org/wiki/Stddev
140 *
141 * The std dev of the mean is related to the std dev by:
142 *
143 * s
144 * s_mean = -------
145 * sqrt(n)
146 *
147 */
148 static double stddev_stats(struct stats *stats)
149 {
150 double variance = stats->M2 / (stats->n - 1);
151 double variance_mean = variance / stats->n;
152
153 return sqrt(variance_mean);
154 }
155
156 struct stats runtime_nsecs_stats[MAX_NR_CPUS];
157 struct stats runtime_cycles_stats[MAX_NR_CPUS];
158 struct stats runtime_branches_stats[MAX_NR_CPUS];
159 struct stats walltime_nsecs_stats;
160
161 static int create_perf_stat_counter(struct perf_evsel *evsel)
162 {
163 struct perf_event_attr *attr = &evsel->attr;
164
165 if (scale)
166 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
167 PERF_FORMAT_TOTAL_TIME_RUNNING;
168
169 if (system_wide)
170 return perf_evsel__open_per_cpu(evsel, cpus->nr, cpus->map);
171
172 attr->inherit = !no_inherit;
173 if (target_pid == -1 && target_tid == -1) {
174 attr->disabled = 1;
175 attr->enable_on_exec = 1;
176 }
177
178 return perf_evsel__open_per_thread(evsel, thread_num, all_tids);
179 }
180
181 /*
182 * Does the counter have nsecs as a unit?
183 */
184 static inline int nsec_counter(struct perf_evsel *evsel)
185 {
186 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
187 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
188 return 1;
189
190 return 0;
191 }
192
193 /*
194 * Read out the results of a single counter:
195 * aggregate counts across CPUs in system-wide mode
196 */
197 static int read_counter_aggr(struct perf_evsel *counter)
198 {
199 struct perf_stat *ps = counter->priv;
200 u64 *count = counter->counts->aggr.values;
201 int i;
202
203 if (__perf_evsel__read(counter, cpus->nr, thread_num, scale) < 0)
204 return -1;
205
206 for (i = 0; i < 3; i++)
207 update_stats(&ps->res_stats[i], count[i]);
208
209 if (verbose) {
210 fprintf(stderr, "%s: %Ld %Ld %Ld\n", event_name(counter),
211 count[0], count[1], count[2]);
212 }
213
214 /*
215 * Save the full runtime - to allow normalization during printout:
216 */
217 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
218 update_stats(&runtime_nsecs_stats[0], count[0]);
219 if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
220 update_stats(&runtime_cycles_stats[0], count[0]);
221 if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
222 update_stats(&runtime_branches_stats[0], count[0]);
223
224 return 0;
225 }
226
227 /*
228 * Read out the results of a single counter:
229 * do not aggregate counts across CPUs in system-wide mode
230 */
231 static int read_counter(struct perf_evsel *counter)
232 {
233 u64 *count;
234 int cpu;
235
236 for (cpu = 0; cpu < cpus->nr; cpu++) {
237 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
238 return -1;
239
240 count = counter->counts->cpu[cpu].values;
241
242 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
243 update_stats(&runtime_nsecs_stats[cpu], count[0]);
244 if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
245 update_stats(&runtime_cycles_stats[cpu], count[0]);
246 if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
247 update_stats(&runtime_branches_stats[cpu], count[0]);
248 }
249
250 return 0;
251 }
252
253 static int run_perf_stat(int argc __used, const char **argv)
254 {
255 unsigned long long t0, t1;
256 struct perf_evsel *counter;
257 int status = 0;
258 int child_ready_pipe[2], go_pipe[2];
259 const bool forks = (argc > 0);
260 char buf;
261
262 if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
263 perror("failed to create pipes");
264 exit(1);
265 }
266
267 if (forks) {
268 if ((child_pid = fork()) < 0)
269 perror("failed to fork");
270
271 if (!child_pid) {
272 close(child_ready_pipe[0]);
273 close(go_pipe[1]);
274 fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
275
276 /*
277 * Do a dummy execvp to get the PLT entry resolved,
278 * so we avoid the resolver overhead on the real
279 * execvp call.
280 */
281 execvp("", (char **)argv);
282
283 /*
284 * Tell the parent we're ready to go
285 */
286 close(child_ready_pipe[1]);
287
288 /*
289 * Wait until the parent tells us to go.
290 */
291 if (read(go_pipe[0], &buf, 1) == -1)
292 perror("unable to read pipe");
293
294 execvp(argv[0], (char **)argv);
295
296 perror(argv[0]);
297 exit(-1);
298 }
299
300 if (target_tid == -1 && target_pid == -1 && !system_wide)
301 all_tids[0] = child_pid;
302
303 /*
304 * Wait for the child to be ready to exec.
305 */
306 close(child_ready_pipe[1]);
307 close(go_pipe[0]);
308 if (read(child_ready_pipe[0], &buf, 1) == -1)
309 perror("unable to read pipe");
310 close(child_ready_pipe[0]);
311 }
312
313 list_for_each_entry(counter, &evsel_list, node) {
314 if (create_perf_stat_counter(counter) < 0) {
315 if (errno == -EPERM || errno == -EACCES) {
316 error("You may not have permission to collect %sstats.\n"
317 "\t Consider tweaking"
318 " /proc/sys/kernel/perf_event_paranoid or running as root.",
319 system_wide ? "system-wide " : "");
320 } else {
321 error("open_counter returned with %d (%s). "
322 "/bin/dmesg may provide additional information.\n",
323 errno, strerror(errno));
324 }
325 if (child_pid != -1)
326 kill(child_pid, SIGTERM);
327 die("Not all events could be opened.\n");
328 return -1;
329 }
330 }
331
332 /*
333 * Enable counters and exec the command:
334 */
335 t0 = rdclock();
336
337 if (forks) {
338 close(go_pipe[1]);
339 wait(&status);
340 } else {
341 while(!done) sleep(1);
342 }
343
344 t1 = rdclock();
345
346 update_stats(&walltime_nsecs_stats, t1 - t0);
347
348 if (no_aggr) {
349 list_for_each_entry(counter, &evsel_list, node) {
350 read_counter(counter);
351 perf_evsel__close_fd(counter, cpus->nr, 1);
352 }
353 } else {
354 list_for_each_entry(counter, &evsel_list, node) {
355 read_counter_aggr(counter);
356 perf_evsel__close_fd(counter, cpus->nr, thread_num);
357 }
358 }
359
360 return WEXITSTATUS(status);
361 }
362
363 static void print_noise(struct perf_evsel *evsel, double avg)
364 {
365 struct perf_stat *ps;
366
367 if (run_count == 1)
368 return;
369
370 ps = evsel->priv;
371 fprintf(stderr, " ( +- %7.3f%% )",
372 100 * stddev_stats(&ps->res_stats[0]) / avg);
373 }
374
375 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
376 {
377 double msecs = avg / 1e6;
378 char cpustr[16] = { '\0', };
379 const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-24s";
380
381 if (no_aggr)
382 sprintf(cpustr, "CPU%*d%s",
383 csv_output ? 0 : -4,
384 cpus->map[cpu], csv_sep);
385
386 fprintf(stderr, fmt, cpustr, msecs, csv_sep, event_name(evsel));
387
388 if (csv_output)
389 return;
390
391 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
392 fprintf(stderr, " # %10.3f CPUs ",
393 avg / avg_stats(&walltime_nsecs_stats));
394 }
395
396 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
397 {
398 double total, ratio = 0.0;
399 char cpustr[16] = { '\0', };
400 const char *fmt;
401
402 if (csv_output)
403 fmt = "%s%.0f%s%s";
404 else if (big_num)
405 fmt = "%s%'18.0f%s%-24s";
406 else
407 fmt = "%s%18.0f%s%-24s";
408
409 if (no_aggr)
410 sprintf(cpustr, "CPU%*d%s",
411 csv_output ? 0 : -4,
412 cpus->map[cpu], csv_sep);
413 else
414 cpu = 0;
415
416 fprintf(stderr, fmt, cpustr, avg, csv_sep, event_name(evsel));
417
418 if (csv_output)
419 return;
420
421 if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
422 total = avg_stats(&runtime_cycles_stats[cpu]);
423
424 if (total)
425 ratio = avg / total;
426
427 fprintf(stderr, " # %10.3f IPC ", ratio);
428 } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
429 runtime_branches_stats[cpu].n != 0) {
430 total = avg_stats(&runtime_branches_stats[cpu]);
431
432 if (total)
433 ratio = avg * 100 / total;
434
435 fprintf(stderr, " # %10.3f %% ", ratio);
436
437 } else if (runtime_nsecs_stats[cpu].n != 0) {
438 total = avg_stats(&runtime_nsecs_stats[cpu]);
439
440 if (total)
441 ratio = 1000.0 * avg / total;
442
443 fprintf(stderr, " # %10.3f M/sec", ratio);
444 }
445 }
446
447 /*
448 * Print out the results of a single counter:
449 * aggregated counts in system-wide mode
450 */
451 static void print_counter_aggr(struct perf_evsel *counter)
452 {
453 struct perf_stat *ps = counter->priv;
454 double avg = avg_stats(&ps->res_stats[0]);
455 int scaled = counter->counts->scaled;
456
457 if (scaled == -1) {
458 fprintf(stderr, "%*s%s%-24s\n",
459 csv_output ? 0 : 18,
460 "<not counted>", csv_sep, event_name(counter));
461 return;
462 }
463
464 if (nsec_counter(counter))
465 nsec_printout(-1, counter, avg);
466 else
467 abs_printout(-1, counter, avg);
468
469 if (csv_output) {
470 fputc('\n', stderr);
471 return;
472 }
473
474 print_noise(counter, avg);
475
476 if (scaled) {
477 double avg_enabled, avg_running;
478
479 avg_enabled = avg_stats(&ps->res_stats[1]);
480 avg_running = avg_stats(&ps->res_stats[2]);
481
482 fprintf(stderr, " (scaled from %.2f%%)",
483 100 * avg_running / avg_enabled);
484 }
485
486 fprintf(stderr, "\n");
487 }
488
489 /*
490 * Print out the results of a single counter:
491 * does not use aggregated count in system-wide
492 */
493 static void print_counter(struct perf_evsel *counter)
494 {
495 u64 ena, run, val;
496 int cpu;
497
498 for (cpu = 0; cpu < cpus->nr; cpu++) {
499 val = counter->counts->cpu[cpu].val;
500 ena = counter->counts->cpu[cpu].ena;
501 run = counter->counts->cpu[cpu].run;
502 if (run == 0 || ena == 0) {
503 fprintf(stderr, "CPU%*d%s%*s%s%-24s",
504 csv_output ? 0 : -4,
505 cpus->map[cpu], csv_sep,
506 csv_output ? 0 : 18,
507 "<not counted>", csv_sep,
508 event_name(counter));
509
510 fprintf(stderr, "\n");
511 continue;
512 }
513
514 if (nsec_counter(counter))
515 nsec_printout(cpu, counter, val);
516 else
517 abs_printout(cpu, counter, val);
518
519 if (!csv_output) {
520 print_noise(counter, 1.0);
521
522 if (run != ena) {
523 fprintf(stderr, " (scaled from %.2f%%)",
524 100.0 * run / ena);
525 }
526 }
527 fprintf(stderr, "\n");
528 }
529 }
530
531 static void print_stat(int argc, const char **argv)
532 {
533 struct perf_evsel *counter;
534 int i;
535
536 fflush(stdout);
537
538 if (!csv_output) {
539 fprintf(stderr, "\n");
540 fprintf(stderr, " Performance counter stats for ");
541 if(target_pid == -1 && target_tid == -1) {
542 fprintf(stderr, "\'%s", argv[0]);
543 for (i = 1; i < argc; i++)
544 fprintf(stderr, " %s", argv[i]);
545 } else if (target_pid != -1)
546 fprintf(stderr, "process id \'%d", target_pid);
547 else
548 fprintf(stderr, "thread id \'%d", target_tid);
549
550 fprintf(stderr, "\'");
551 if (run_count > 1)
552 fprintf(stderr, " (%d runs)", run_count);
553 fprintf(stderr, ":\n\n");
554 }
555
556 if (no_aggr) {
557 list_for_each_entry(counter, &evsel_list, node)
558 print_counter(counter);
559 } else {
560 list_for_each_entry(counter, &evsel_list, node)
561 print_counter_aggr(counter);
562 }
563
564 if (!csv_output) {
565 fprintf(stderr, "\n");
566 fprintf(stderr, " %18.9f seconds time elapsed",
567 avg_stats(&walltime_nsecs_stats)/1e9);
568 if (run_count > 1) {
569 fprintf(stderr, " ( +- %7.3f%% )",
570 100*stddev_stats(&walltime_nsecs_stats) /
571 avg_stats(&walltime_nsecs_stats));
572 }
573 fprintf(stderr, "\n\n");
574 }
575 }
576
577 static volatile int signr = -1;
578
579 static void skip_signal(int signo)
580 {
581 if(child_pid == -1)
582 done = 1;
583
584 signr = signo;
585 }
586
587 static void sig_atexit(void)
588 {
589 if (child_pid != -1)
590 kill(child_pid, SIGTERM);
591
592 if (signr == -1)
593 return;
594
595 signal(signr, SIG_DFL);
596 kill(getpid(), signr);
597 }
598
599 static const char * const stat_usage[] = {
600 "perf stat [<options>] [<command>]",
601 NULL
602 };
603
604 static int stat__set_big_num(const struct option *opt __used,
605 const char *s __used, int unset)
606 {
607 big_num_opt = unset ? 0 : 1;
608 return 0;
609 }
610
611 static const struct option options[] = {
612 OPT_CALLBACK('e', "event", NULL, "event",
613 "event selector. use 'perf list' to list available events",
614 parse_events),
615 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
616 "child tasks do not inherit counters"),
617 OPT_INTEGER('p', "pid", &target_pid,
618 "stat events on existing process id"),
619 OPT_INTEGER('t', "tid", &target_tid,
620 "stat events on existing thread id"),
621 OPT_BOOLEAN('a', "all-cpus", &system_wide,
622 "system-wide collection from all CPUs"),
623 OPT_BOOLEAN('c', "scale", &scale,
624 "scale/normalize counters"),
625 OPT_INCR('v', "verbose", &verbose,
626 "be more verbose (show counter open errors, etc)"),
627 OPT_INTEGER('r', "repeat", &run_count,
628 "repeat command and print average + stddev (max: 100)"),
629 OPT_BOOLEAN('n', "null", &null_run,
630 "null run - dont start any counters"),
631 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
632 "print large numbers with thousands\' separators",
633 stat__set_big_num),
634 OPT_STRING('C', "cpu", &cpu_list, "cpu",
635 "list of cpus to monitor in system-wide"),
636 OPT_BOOLEAN('A', "no-aggr", &no_aggr,
637 "disable CPU count aggregation"),
638 OPT_STRING('x', "field-separator", &csv_sep, "separator",
639 "print counts with custom separator"),
640 OPT_END()
641 };
642
643 int cmd_stat(int argc, const char **argv, const char *prefix __used)
644 {
645 struct perf_evsel *pos;
646 int status = -ENOMEM;
647
648 setlocale(LC_ALL, "");
649
650 argc = parse_options(argc, argv, options, stat_usage,
651 PARSE_OPT_STOP_AT_NON_OPTION);
652
653 if (csv_sep)
654 csv_output = true;
655 else
656 csv_sep = DEFAULT_SEPARATOR;
657
658 /*
659 * let the spreadsheet do the pretty-printing
660 */
661 if (csv_output) {
662 /* User explicitely passed -B? */
663 if (big_num_opt == 1) {
664 fprintf(stderr, "-B option not supported with -x\n");
665 usage_with_options(stat_usage, options);
666 } else /* Nope, so disable big number formatting */
667 big_num = false;
668 } else if (big_num_opt == 0) /* User passed --no-big-num */
669 big_num = false;
670
671 if (!argc && target_pid == -1 && target_tid == -1)
672 usage_with_options(stat_usage, options);
673 if (run_count <= 0)
674 usage_with_options(stat_usage, options);
675
676 /* no_aggr is for system-wide only */
677 if (no_aggr && !system_wide)
678 usage_with_options(stat_usage, options);
679
680 /* Set attrs and nr_counters if no event is selected and !null_run */
681 if (!null_run && !nr_counters) {
682 size_t c;
683
684 nr_counters = ARRAY_SIZE(default_attrs);
685
686 for (c = 0; c < ARRAY_SIZE(default_attrs); ++c) {
687 pos = perf_evsel__new(default_attrs[c].type,
688 default_attrs[c].config,
689 nr_counters);
690 if (pos == NULL)
691 goto out;
692 list_add(&pos->node, &evsel_list);
693 }
694 }
695
696 if (system_wide)
697 cpus = cpu_map__new(cpu_list);
698 else
699 cpus = cpu_map__dummy_new();
700
701 if (cpus == NULL) {
702 perror("failed to parse CPUs map");
703 usage_with_options(stat_usage, options);
704 return -1;
705 }
706
707 if (target_pid != -1) {
708 target_tid = target_pid;
709 thread_num = find_all_tid(target_pid, &all_tids);
710 if (thread_num <= 0) {
711 fprintf(stderr, "Can't find all threads of pid %d\n",
712 target_pid);
713 usage_with_options(stat_usage, options);
714 }
715 } else {
716 all_tids=malloc(sizeof(pid_t));
717 if (!all_tids)
718 return -ENOMEM;
719
720 all_tids[0] = target_tid;
721 thread_num = 1;
722 }
723
724 list_for_each_entry(pos, &evsel_list, node) {
725 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
726 perf_evsel__alloc_counts(pos, cpus->nr) < 0 ||
727 perf_evsel__alloc_fd(pos, cpus->nr, thread_num) < 0)
728 goto out_free_fd;
729 }
730
731 /*
732 * We dont want to block the signals - that would cause
733 * child tasks to inherit that and Ctrl-C would not work.
734 * What we want is for Ctrl-C to work in the exec()-ed
735 * task, but being ignored by perf stat itself:
736 */
737 atexit(sig_atexit);
738 signal(SIGINT, skip_signal);
739 signal(SIGALRM, skip_signal);
740 signal(SIGABRT, skip_signal);
741
742 status = 0;
743 for (run_idx = 0; run_idx < run_count; run_idx++) {
744 if (run_count != 1 && verbose)
745 fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1);
746 status = run_perf_stat(argc, argv);
747 }
748
749 if (status != -1)
750 print_stat(argc, argv);
751 out_free_fd:
752 list_for_each_entry(pos, &evsel_list, node)
753 perf_evsel__free_stat_priv(pos);
754 out:
755 return status;
756 }
Linux kernel - Deliverables
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