?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
pnfs: resolve header dependency in pnfs.h
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / tools / perf / builtin-stat.c
blob03f0e45f1479c2fab31de2624d69d95458886157
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/evlist.h"
47 #include "util/evsel.h"
48 #include "util/debug.h"
49 #include "util/header.h"
50 #include "util/cpumap.h"
51 #include "util/thread.h"
52 #include "util/thread_map.h"
53
54 #include <sys/prctl.h>
55 #include <math.h>
56 #include <locale.h>
57
58 #define DEFAULT_SEPARATOR " "
59
60 static struct perf_event_attr default_attrs[] = {
61
62 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
63 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
64 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
65 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
66
67 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
68 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
69 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
70 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
71 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_REFERENCES },
72 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CACHE_MISSES },
73
74 };
75
76 struct perf_evlist *evsel_list;
77
78 static bool system_wide = false;
79 static int run_idx = 0;
80
81 static int run_count = 1;
82 static bool no_inherit = false;
83 static bool scale = true;
84 static bool no_aggr = false;
85 static pid_t target_pid = -1;
86 static pid_t target_tid = -1;
87 static pid_t child_pid = -1;
88 static bool null_run = false;
89 static bool big_num = true;
90 static int big_num_opt = -1;
91 static const char *cpu_list;
92 static const char *csv_sep = NULL;
93 static bool csv_output = false;
94
95 static volatile int done = 0;
96
97 struct stats
98 {
99 double n, mean, M2;
100 };
101
102 struct perf_stat {
103 struct stats res_stats[3];
104 };
105
106 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
107 {
108 evsel->priv = zalloc(sizeof(struct perf_stat));
109 return evsel->priv == NULL ? -ENOMEM : 0;
110 }
111
112 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
113 {
114 free(evsel->priv);
115 evsel->priv = NULL;
116 }
117
118 static void update_stats(struct stats *stats, u64 val)
119 {
120 double delta;
121
122 stats->n++;
123 delta = val - stats->mean;
124 stats->mean += delta / stats->n;
125 stats->M2 += delta*(val - stats->mean);
126 }
127
128 static double avg_stats(struct stats *stats)
129 {
130 return stats->mean;
131 }
132
133 /*
134 * http://en.wikipedia.org/wiki/Algorithms_for_calculating_variance
135 *
136 * (\Sum n_i^2) - ((\Sum n_i)^2)/n
137 * s^2 = -------------------------------
138 * n - 1
139 *
140 * http://en.wikipedia.org/wiki/Stddev
141 *
142 * The std dev of the mean is related to the std dev by:
143 *
144 * s
145 * s_mean = -------
146 * sqrt(n)
147 *
148 */
149 static double stddev_stats(struct stats *stats)
150 {
151 double variance = stats->M2 / (stats->n - 1);
152 double variance_mean = variance / stats->n;
153
154 return sqrt(variance_mean);
155 }
156
157 struct stats runtime_nsecs_stats[MAX_NR_CPUS];
158 struct stats runtime_cycles_stats[MAX_NR_CPUS];
159 struct stats runtime_branches_stats[MAX_NR_CPUS];
160 struct stats walltime_nsecs_stats;
161
162 static int create_perf_stat_counter(struct perf_evsel *evsel)
163 {
164 struct perf_event_attr *attr = &evsel->attr;
165
166 if (scale)
167 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
168 PERF_FORMAT_TOTAL_TIME_RUNNING;
169
170 attr->inherit = !no_inherit;
171
172 if (system_wide)
173 return perf_evsel__open_per_cpu(evsel, evsel_list->cpus, false);
174
175 if (target_pid == -1 && target_tid == -1) {
176 attr->disabled = 1;
177 attr->enable_on_exec = 1;
178 }
179
180 return perf_evsel__open_per_thread(evsel, evsel_list->threads, false);
181 }
182
183 /*
184 * Does the counter have nsecs as a unit?
185 */
186 static inline int nsec_counter(struct perf_evsel *evsel)
187 {
188 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
189 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
190 return 1;
191
192 return 0;
193 }
194
195 /*
196 * Read out the results of a single counter:
197 * aggregate counts across CPUs in system-wide mode
198 */
199 static int read_counter_aggr(struct perf_evsel *counter)
200 {
201 struct perf_stat *ps = counter->priv;
202 u64 *count = counter->counts->aggr.values;
203 int i;
204
205 if (__perf_evsel__read(counter, evsel_list->cpus->nr,
206 evsel_list->threads->nr, scale) < 0)
207 return -1;
208
209 for (i = 0; i < 3; i++)
210 update_stats(&ps->res_stats[i], count[i]);
211
212 if (verbose) {
213 fprintf(stderr, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
214 event_name(counter), count[0], count[1], count[2]);
215 }
216
217 /*
218 * Save the full runtime - to allow normalization during printout:
219 */
220 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
221 update_stats(&runtime_nsecs_stats[0], count[0]);
222 if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
223 update_stats(&runtime_cycles_stats[0], count[0]);
224 if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
225 update_stats(&runtime_branches_stats[0], count[0]);
226
227 return 0;
228 }
229
230 /*
231 * Read out the results of a single counter:
232 * do not aggregate counts across CPUs in system-wide mode
233 */
234 static int read_counter(struct perf_evsel *counter)
235 {
236 u64 *count;
237 int cpu;
238
239 for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
240 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
241 return -1;
242
243 count = counter->counts->cpu[cpu].values;
244
245 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
246 update_stats(&runtime_nsecs_stats[cpu], count[0]);
247 if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
248 update_stats(&runtime_cycles_stats[cpu], count[0]);
249 if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
250 update_stats(&runtime_branches_stats[cpu], count[0]);
251 }
252
253 return 0;
254 }
255
256 static int run_perf_stat(int argc __used, const char **argv)
257 {
258 unsigned long long t0, t1;
259 struct perf_evsel *counter;
260 int status = 0;
261 int child_ready_pipe[2], go_pipe[2];
262 const bool forks = (argc > 0);
263 char buf;
264
265 if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
266 perror("failed to create pipes");
267 exit(1);
268 }
269
270 if (forks) {
271 if ((child_pid = fork()) < 0)
272 perror("failed to fork");
273
274 if (!child_pid) {
275 close(child_ready_pipe[0]);
276 close(go_pipe[1]);
277 fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
278
279 /*
280 * Do a dummy execvp to get the PLT entry resolved,
281 * so we avoid the resolver overhead on the real
282 * execvp call.
283 */
284 execvp("", (char **)argv);
285
286 /*
287 * Tell the parent we're ready to go
288 */
289 close(child_ready_pipe[1]);
290
291 /*
292 * Wait until the parent tells us to go.
293 */
294 if (read(go_pipe[0], &buf, 1) == -1)
295 perror("unable to read pipe");
296
297 execvp(argv[0], (char **)argv);
298
299 perror(argv[0]);
300 exit(-1);
301 }
302
303 if (target_tid == -1 && target_pid == -1 && !system_wide)
304 evsel_list->threads->map[0] = child_pid;
305
306 /*
307 * Wait for the child to be ready to exec.
308 */
309 close(child_ready_pipe[1]);
310 close(go_pipe[0]);
311 if (read(child_ready_pipe[0], &buf, 1) == -1)
312 perror("unable to read pipe");
313 close(child_ready_pipe[0]);
314 }
315
316 list_for_each_entry(counter, &evsel_list->entries, node) {
317 if (create_perf_stat_counter(counter) < 0) {
318 if (errno == -EPERM || errno == -EACCES) {
319 error("You may not have permission to collect %sstats.\n"
320 "\t Consider tweaking"
321 " /proc/sys/kernel/perf_event_paranoid or running as root.",
322 system_wide ? "system-wide " : "");
323 } else if (errno == ENOENT) {
324 error("%s event is not supported. ", event_name(counter));
325 } else {
326 error("open_counter returned with %d (%s). "
327 "/bin/dmesg may provide additional information.\n",
328 errno, strerror(errno));
329 }
330 if (child_pid != -1)
331 kill(child_pid, SIGTERM);
332 die("Not all events could be opened.\n");
333 return -1;
334 }
335 }
336
337 if (perf_evlist__set_filters(evsel_list)) {
338 error("failed to set filter with %d (%s)\n", errno,
339 strerror(errno));
340 return -1;
341 }
342
343 /*
344 * Enable counters and exec the command:
345 */
346 t0 = rdclock();
347
348 if (forks) {
349 close(go_pipe[1]);
350 wait(&status);
351 } else {
352 while(!done) sleep(1);
353 }
354
355 t1 = rdclock();
356
357 update_stats(&walltime_nsecs_stats, t1 - t0);
358
359 if (no_aggr) {
360 list_for_each_entry(counter, &evsel_list->entries, node) {
361 read_counter(counter);
362 perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1);
363 }
364 } else {
365 list_for_each_entry(counter, &evsel_list->entries, node) {
366 read_counter_aggr(counter);
367 perf_evsel__close_fd(counter, evsel_list->cpus->nr,
368 evsel_list->threads->nr);
369 }
370 }
371
372 return WEXITSTATUS(status);
373 }
374
375 static void print_noise(struct perf_evsel *evsel, double avg)
376 {
377 struct perf_stat *ps;
378
379 if (run_count == 1)
380 return;
381
382 ps = evsel->priv;
383 fprintf(stderr, " ( +- %7.3f%% )",
384 100 * stddev_stats(&ps->res_stats[0]) / avg);
385 }
386
387 static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
388 {
389 double msecs = avg / 1e6;
390 char cpustr[16] = { '\0', };
391 const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-24s";
392
393 if (no_aggr)
394 sprintf(cpustr, "CPU%*d%s",
395 csv_output ? 0 : -4,
396 evsel_list->cpus->map[cpu], csv_sep);
397
398 fprintf(stderr, fmt, cpustr, msecs, csv_sep, event_name(evsel));
399
400 if (evsel->cgrp)
401 fprintf(stderr, "%s%s", csv_sep, evsel->cgrp->name);
402
403 if (csv_output)
404 return;
405
406 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
407 fprintf(stderr, " # %10.3f CPUs ",
408 avg / avg_stats(&walltime_nsecs_stats));
409 }
410
411 static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
412 {
413 double total, ratio = 0.0;
414 char cpustr[16] = { '\0', };
415 const char *fmt;
416
417 if (csv_output)
418 fmt = "%s%.0f%s%s";
419 else if (big_num)
420 fmt = "%s%'18.0f%s%-24s";
421 else
422 fmt = "%s%18.0f%s%-24s";
423
424 if (no_aggr)
425 sprintf(cpustr, "CPU%*d%s",
426 csv_output ? 0 : -4,
427 evsel_list->cpus->map[cpu], csv_sep);
428 else
429 cpu = 0;
430
431 fprintf(stderr, fmt, cpustr, avg, csv_sep, event_name(evsel));
432
433 if (evsel->cgrp)
434 fprintf(stderr, "%s%s", csv_sep, evsel->cgrp->name);
435
436 if (csv_output)
437 return;
438
439 if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
440 total = avg_stats(&runtime_cycles_stats[cpu]);
441
442 if (total)
443 ratio = avg / total;
444
445 fprintf(stderr, " # %10.3f IPC ", ratio);
446 } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
447 runtime_branches_stats[cpu].n != 0) {
448 total = avg_stats(&runtime_branches_stats[cpu]);
449
450 if (total)
451 ratio = avg * 100 / total;
452
453 fprintf(stderr, " # %10.3f %% ", ratio);
454
455 } else if (runtime_nsecs_stats[cpu].n != 0) {
456 total = avg_stats(&runtime_nsecs_stats[cpu]);
457
458 if (total)
459 ratio = 1000.0 * avg / total;
460
461 fprintf(stderr, " # %10.3f M/sec", ratio);
462 }
463 }
464
465 /*
466 * Print out the results of a single counter:
467 * aggregated counts in system-wide mode
468 */
469 static void print_counter_aggr(struct perf_evsel *counter)
470 {
471 struct perf_stat *ps = counter->priv;
472 double avg = avg_stats(&ps->res_stats[0]);
473 int scaled = counter->counts->scaled;
474
475 if (scaled == -1) {
476 fprintf(stderr, "%*s%s%*s",
477 csv_output ? 0 : 18,
478 "<not counted>",
479 csv_sep,
480 csv_output ? 0 : -24,
481 event_name(counter));
482
483 if (counter->cgrp)
484 fprintf(stderr, "%s%s", csv_sep, counter->cgrp->name);
485
486 fputc('\n', stderr);
487 return;
488 }
489
490 if (nsec_counter(counter))
491 nsec_printout(-1, counter, avg);
492 else
493 abs_printout(-1, counter, avg);
494
495 if (csv_output) {
496 fputc('\n', stderr);
497 return;
498 }
499
500 print_noise(counter, avg);
501
502 if (scaled) {
503 double avg_enabled, avg_running;
504
505 avg_enabled = avg_stats(&ps->res_stats[1]);
506 avg_running = avg_stats(&ps->res_stats[2]);
507
508 fprintf(stderr, " (scaled from %.2f%%)",
509 100 * avg_running / avg_enabled);
510 }
511 fprintf(stderr, "\n");
512 }
513
514 /*
515 * Print out the results of a single counter:
516 * does not use aggregated count in system-wide
517 */
518 static void print_counter(struct perf_evsel *counter)
519 {
520 u64 ena, run, val;
521 int cpu;
522
523 for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
524 val = counter->counts->cpu[cpu].val;
525 ena = counter->counts->cpu[cpu].ena;
526 run = counter->counts->cpu[cpu].run;
527 if (run == 0 || ena == 0) {
528 fprintf(stderr, "CPU%*d%s%*s%s%*s",
529 csv_output ? 0 : -4,
530 evsel_list->cpus->map[cpu], csv_sep,
531 csv_output ? 0 : 18,
532 "<not counted>", csv_sep,
533 csv_output ? 0 : -24,
534 event_name(counter));
535
536 if (counter->cgrp)
537 fprintf(stderr, "%s%s", csv_sep, counter->cgrp->name);
538
539 fputc('\n', stderr);
540 continue;
541 }
542
543 if (nsec_counter(counter))
544 nsec_printout(cpu, counter, val);
545 else
546 abs_printout(cpu, counter, val);
547
548 if (!csv_output) {
549 print_noise(counter, 1.0);
550
551 if (run != ena) {
552 fprintf(stderr, " (scaled from %.2f%%)",
553 100.0 * run / ena);
554 }
555 }
556 fputc('\n', stderr);
557 }
558 }
559
560 static void print_stat(int argc, const char **argv)
561 {
562 struct perf_evsel *counter;
563 int i;
564
565 fflush(stdout);
566
567 if (!csv_output) {
568 fprintf(stderr, "\n");
569 fprintf(stderr, " Performance counter stats for ");
570 if(target_pid == -1 && target_tid == -1) {
571 fprintf(stderr, "\'%s", argv[0]);
572 for (i = 1; i < argc; i++)
573 fprintf(stderr, " %s", argv[i]);
574 } else if (target_pid != -1)
575 fprintf(stderr, "process id \'%d", target_pid);
576 else
577 fprintf(stderr, "thread id \'%d", target_tid);
578
579 fprintf(stderr, "\'");
580 if (run_count > 1)
581 fprintf(stderr, " (%d runs)", run_count);
582 fprintf(stderr, ":\n\n");
583 }
584
585 if (no_aggr) {
586 list_for_each_entry(counter, &evsel_list->entries, node)
587 print_counter(counter);
588 } else {
589 list_for_each_entry(counter, &evsel_list->entries, node)
590 print_counter_aggr(counter);
591 }
592
593 if (!csv_output) {
594 fprintf(stderr, "\n");
595 fprintf(stderr, " %18.9f seconds time elapsed",
596 avg_stats(&walltime_nsecs_stats)/1e9);
597 if (run_count > 1) {
598 fprintf(stderr, " ( +- %7.3f%% )",
599 100*stddev_stats(&walltime_nsecs_stats) /
600 avg_stats(&walltime_nsecs_stats));
601 }
602 fprintf(stderr, "\n\n");
603 }
604 }
605
606 static volatile int signr = -1;
607
608 static void skip_signal(int signo)
609 {
610 if(child_pid == -1)
611 done = 1;
612
613 signr = signo;
614 }
615
616 static void sig_atexit(void)
617 {
618 if (child_pid != -1)
619 kill(child_pid, SIGTERM);
620
621 if (signr == -1)
622 return;
623
624 signal(signr, SIG_DFL);
625 kill(getpid(), signr);
626 }
627
628 static const char * const stat_usage[] = {
629 "perf stat [<options>] [<command>]",
630 NULL
631 };
632
633 static int stat__set_big_num(const struct option *opt __used,
634 const char *s __used, int unset)
635 {
636 big_num_opt = unset ? 0 : 1;
637 return 0;
638 }
639
640 static const struct option options[] = {
641 OPT_CALLBACK('e', "event", &evsel_list, "event",
642 "event selector. use 'perf list' to list available events",
643 parse_events),
644 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
645 "event filter", parse_filter),
646 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
647 "child tasks do not inherit counters"),
648 OPT_INTEGER('p', "pid", &target_pid,
649 "stat events on existing process id"),
650 OPT_INTEGER('t', "tid", &target_tid,
651 "stat events on existing thread id"),
652 OPT_BOOLEAN('a', "all-cpus", &system_wide,
653 "system-wide collection from all CPUs"),
654 OPT_BOOLEAN('c', "scale", &scale,
655 "scale/normalize counters"),
656 OPT_INCR('v', "verbose", &verbose,
657 "be more verbose (show counter open errors, etc)"),
658 OPT_INTEGER('r', "repeat", &run_count,
659 "repeat command and print average + stddev (max: 100)"),
660 OPT_BOOLEAN('n', "null", &null_run,
661 "null run - dont start any counters"),
662 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
663 "print large numbers with thousands\' separators",
664 stat__set_big_num),
665 OPT_STRING('C', "cpu", &cpu_list, "cpu",
666 "list of cpus to monitor in system-wide"),
667 OPT_BOOLEAN('A', "no-aggr", &no_aggr,
668 "disable CPU count aggregation"),
669 OPT_STRING('x', "field-separator", &csv_sep, "separator",
670 "print counts with custom separator"),
671 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
672 "monitor event in cgroup name only",
673 parse_cgroups),
674 OPT_END()
675 };
676
677 int cmd_stat(int argc, const char **argv, const char *prefix __used)
678 {
679 struct perf_evsel *pos;
680 int status = -ENOMEM;
681
682 setlocale(LC_ALL, "");
683
684 evsel_list = perf_evlist__new(NULL, NULL);
685 if (evsel_list == NULL)
686 return -ENOMEM;
687
688 argc = parse_options(argc, argv, options, stat_usage,
689 PARSE_OPT_STOP_AT_NON_OPTION);
690
691 if (csv_sep)
692 csv_output = true;
693 else
694 csv_sep = DEFAULT_SEPARATOR;
695
696 /*
697 * let the spreadsheet do the pretty-printing
698 */
699 if (csv_output) {
700 /* User explicitely passed -B? */
701 if (big_num_opt == 1) {
702 fprintf(stderr, "-B option not supported with -x\n");
703 usage_with_options(stat_usage, options);
704 } else /* Nope, so disable big number formatting */
705 big_num = false;
706 } else if (big_num_opt == 0) /* User passed --no-big-num */
707 big_num = false;
708
709 if (!argc && target_pid == -1 && target_tid == -1)
710 usage_with_options(stat_usage, options);
711 if (run_count <= 0)
712 usage_with_options(stat_usage, options);
713
714 /* no_aggr, cgroup are for system-wide only */
715 if ((no_aggr || nr_cgroups) && !system_wide) {
716 fprintf(stderr, "both cgroup and no-aggregation "
717 "modes only available in system-wide mode\n");
718
719 usage_with_options(stat_usage, options);
720 }
721
722 /* Set attrs and nr_counters if no event is selected and !null_run */
723 if (!null_run && !evsel_list->nr_entries) {
724 size_t c;
725
726 for (c = 0; c < ARRAY_SIZE(default_attrs); ++c) {
727 pos = perf_evsel__new(&default_attrs[c], c);
728 if (pos == NULL)
729 goto out;
730 perf_evlist__add(evsel_list, pos);
731 }
732 }
733
734 if (target_pid != -1)
735 target_tid = target_pid;
736
737 evsel_list->threads = thread_map__new(target_pid, target_tid);
738 if (evsel_list->threads == NULL) {
739 pr_err("Problems finding threads of monitor\n");
740 usage_with_options(stat_usage, options);
741 }
742
743 if (system_wide)
744 evsel_list->cpus = cpu_map__new(cpu_list);
745 else
746 evsel_list->cpus = cpu_map__dummy_new();
747
748 if (evsel_list->cpus == NULL) {
749 perror("failed to parse CPUs map");
750 usage_with_options(stat_usage, options);
751 return -1;
752 }
753
754 list_for_each_entry(pos, &evsel_list->entries, node) {
755 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
756 perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0 ||
757 perf_evsel__alloc_fd(pos, evsel_list->cpus->nr, evsel_list->threads->nr) < 0)
758 goto out_free_fd;
759 }
760
761 /*
762 * We dont want to block the signals - that would cause
763 * child tasks to inherit that and Ctrl-C would not work.
764 * What we want is for Ctrl-C to work in the exec()-ed
765 * task, but being ignored by perf stat itself:
766 */
767 atexit(sig_atexit);
768 signal(SIGINT, skip_signal);
769 signal(SIGALRM, skip_signal);
770 signal(SIGABRT, skip_signal);
771
772 status = 0;
773 for (run_idx = 0; run_idx < run_count; run_idx++) {
774 if (run_count != 1 && verbose)
775 fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1);
776 status = run_perf_stat(argc, argv);
777 }
778
779 if (status != -1)
780 print_stat(argc, argv);
781 out_free_fd:
782 list_for_each_entry(pos, &evsel_list->entries, node)
783 perf_evsel__free_stat_priv(pos);
784 perf_evlist__delete_maps(evsel_list);
785 out:
786 perf_evlist__delete(evsel_list);
787 return status;
788 }
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree