projects / GitHub / mt8127 / android_kernel_alcatel_ttab.git / blame_incremental
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (non-incremental) | history | HEAD
perf stat: Factor our shadow stats
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / tools / perf / builtin-stat.c
... / ...
CommitLineData
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
60static 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
76struct perf_evlist *evsel_list;
77
78static bool system_wide = false;
79static int run_idx = 0;
80
81static int run_count = 1;
82static bool no_inherit = false;
83static bool scale = true;
84static bool no_aggr = false;
85static pid_t target_pid = -1;
86static pid_t target_tid = -1;
87static pid_t child_pid = -1;
88static bool null_run = false;
89static bool big_num = true;
90static int big_num_opt = -1;
91static const char *cpu_list;
92static const char *csv_sep = NULL;
93static bool csv_output = false;
94
95static volatile int done = 0;
96
97struct stats
98{
99 double n, mean, M2;
100};
101
102struct perf_stat {
103 struct stats res_stats[3];
104};
105
106static 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
112static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
113{
114 free(evsel->priv);
115 evsel->priv = NULL;
116}
117
118static 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
128static 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 */
149static 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
157struct stats runtime_nsecs_stats[MAX_NR_CPUS];
158struct stats runtime_cycles_stats[MAX_NR_CPUS];
159struct stats runtime_branches_stats[MAX_NR_CPUS];
160struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
161struct stats walltime_nsecs_stats;
162
163static int create_perf_stat_counter(struct perf_evsel *evsel)
164{
165 struct perf_event_attr *attr = &evsel->attr;
166
167 if (scale)
168 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
169 PERF_FORMAT_TOTAL_TIME_RUNNING;
170
171 attr->inherit = !no_inherit;
172
173 if (system_wide)
174 return perf_evsel__open_per_cpu(evsel, evsel_list->cpus, false);
175
176 if (target_pid == -1 && target_tid == -1) {
177 attr->disabled = 1;
178 attr->enable_on_exec = 1;
179 }
180
181 return perf_evsel__open_per_thread(evsel, evsel_list->threads, false);
182}
183
184/*
185 * Does the counter have nsecs as a unit?
186 */
187static inline int nsec_counter(struct perf_evsel *evsel)
188{
189 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
190 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
191 return 1;
192
193 return 0;
194}
195
196/*
197 * Update various tracking values we maintain to print
198 * more semantic information such as miss/hit ratios,
199 * instruction rates, etc:
200 */
201static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
202{
203 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
204 update_stats(&runtime_nsecs_stats[0], count[0]);
205 else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
206 update_stats(&runtime_cycles_stats[0], count[0]);
207 else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
208 update_stats(&runtime_branches_stats[0], count[0]);
209 else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
210 update_stats(&runtime_cacherefs_stats[0], count[0]);
211}
212
213/*
214 * Read out the results of a single counter:
215 * aggregate counts across CPUs in system-wide mode
216 */
217static int read_counter_aggr(struct perf_evsel *counter)
218{
219 struct perf_stat *ps = counter->priv;
220 u64 *count = counter->counts->aggr.values;
221 int i;
222
223 if (__perf_evsel__read(counter, evsel_list->cpus->nr,
224 evsel_list->threads->nr, scale) < 0)
225 return -1;
226
227 for (i = 0; i < 3; i++)
228 update_stats(&ps->res_stats[i], count[i]);
229
230 if (verbose) {
231 fprintf(stderr, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
232 event_name(counter), count[0], count[1], count[2]);
233 }
234
235 /*
236 * Save the full runtime - to allow normalization during printout:
237 */
238 update_shadow_stats(counter, count);
239
240 return 0;
241}
242
243/*
244 * Read out the results of a single counter:
245 * do not aggregate counts across CPUs in system-wide mode
246 */
247static int read_counter(struct perf_evsel *counter)
248{
249 u64 *count;
250 int cpu;
251
252 for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
253 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
254 return -1;
255
256 count = counter->counts->cpu[cpu].values;
257
258 update_shadow_stats(counter, count);
259 }
260
261 return 0;
262}
263
264static int run_perf_stat(int argc __used, const char **argv)
265{
266 unsigned long long t0, t1;
267 struct perf_evsel *counter;
268 int status = 0;
269 int child_ready_pipe[2], go_pipe[2];
270 const bool forks = (argc > 0);
271 char buf;
272
273 if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
274 perror("failed to create pipes");
275 exit(1);
276 }
277
278 if (forks) {
279 if ((child_pid = fork()) < 0)
280 perror("failed to fork");
281
282 if (!child_pid) {
283 close(child_ready_pipe[0]);
284 close(go_pipe[1]);
285 fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
286
287 /*
288 * Do a dummy execvp to get the PLT entry resolved,
289 * so we avoid the resolver overhead on the real
290 * execvp call.
291 */
292 execvp("", (char **)argv);
293
294 /*
295 * Tell the parent we're ready to go
296 */
297 close(child_ready_pipe[1]);
298
299 /*
300 * Wait until the parent tells us to go.
301 */
302 if (read(go_pipe[0], &buf, 1) == -1)
303 perror("unable to read pipe");
304
305 execvp(argv[0], (char **)argv);
306
307 perror(argv[0]);
308 exit(-1);
309 }
310
311 if (target_tid == -1 && target_pid == -1 && !system_wide)
312 evsel_list->threads->map[0] = child_pid;
313
314 /*
315 * Wait for the child to be ready to exec.
316 */
317 close(child_ready_pipe[1]);
318 close(go_pipe[0]);
319 if (read(child_ready_pipe[0], &buf, 1) == -1)
320 perror("unable to read pipe");
321 close(child_ready_pipe[0]);
322 }
323
324 list_for_each_entry(counter, &evsel_list->entries, node) {
325 if (create_perf_stat_counter(counter) < 0) {
326 if (errno == -EPERM || errno == -EACCES) {
327 error("You may not have permission to collect %sstats.\n"
328 "\t Consider tweaking"
329 " /proc/sys/kernel/perf_event_paranoid or running as root.",
330 system_wide ? "system-wide " : "");
331 } else if (errno == ENOENT) {
332 error("%s event is not supported. ", event_name(counter));
333 } else {
334 error("open_counter returned with %d (%s). "
335 "/bin/dmesg may provide additional information.\n",
336 errno, strerror(errno));
337 }
338 if (child_pid != -1)
339 kill(child_pid, SIGTERM);
340 die("Not all events could be opened.\n");
341 return -1;
342 }
343 }
344
345 if (perf_evlist__set_filters(evsel_list)) {
346 error("failed to set filter with %d (%s)\n", errno,
347 strerror(errno));
348 return -1;
349 }
350
351 /*
352 * Enable counters and exec the command:
353 */
354 t0 = rdclock();
355
356 if (forks) {
357 close(go_pipe[1]);
358 wait(&status);
359 } else {
360 while(!done) sleep(1);
361 }
362
363 t1 = rdclock();
364
365 update_stats(&walltime_nsecs_stats, t1 - t0);
366
367 if (no_aggr) {
368 list_for_each_entry(counter, &evsel_list->entries, node) {
369 read_counter(counter);
370 perf_evsel__close_fd(counter, evsel_list->cpus->nr, 1);
371 }
372 } else {
373 list_for_each_entry(counter, &evsel_list->entries, node) {
374 read_counter_aggr(counter);
375 perf_evsel__close_fd(counter, evsel_list->cpus->nr,
376 evsel_list->threads->nr);
377 }
378 }
379
380 return WEXITSTATUS(status);
381}
382
383static void print_noise(struct perf_evsel *evsel, double avg)
384{
385 struct perf_stat *ps;
386
387 if (run_count == 1)
388 return;
389
390 ps = evsel->priv;
391 fprintf(stderr, " ( +- %7.3f%% )",
392 100 * stddev_stats(&ps->res_stats[0]) / avg);
393}
394
395static void nsec_printout(int cpu, struct perf_evsel *evsel, double avg)
396{
397 double msecs = avg / 1e6;
398 char cpustr[16] = { '\0', };
399 const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-24s";
400
401 if (no_aggr)
402 sprintf(cpustr, "CPU%*d%s",
403 csv_output ? 0 : -4,
404 evsel_list->cpus->map[cpu], csv_sep);
405
406 fprintf(stderr, fmt, cpustr, msecs, csv_sep, event_name(evsel));
407
408 if (evsel->cgrp)
409 fprintf(stderr, "%s%s", csv_sep, evsel->cgrp->name);
410
411 if (csv_output)
412 return;
413
414 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
415 fprintf(stderr, " # %10.3f CPUs",
416 avg / avg_stats(&walltime_nsecs_stats));
417}
418
419static void abs_printout(int cpu, struct perf_evsel *evsel, double avg)
420{
421 double total, ratio = 0.0;
422 char cpustr[16] = { '\0', };
423 const char *fmt;
424
425 if (csv_output)
426 fmt = "%s%.0f%s%s";
427 else if (big_num)
428 fmt = "%s%'18.0f%s%-24s";
429 else
430 fmt = "%s%18.0f%s%-24s";
431
432 if (no_aggr)
433 sprintf(cpustr, "CPU%*d%s",
434 csv_output ? 0 : -4,
435 evsel_list->cpus->map[cpu], csv_sep);
436 else
437 cpu = 0;
438
439 fprintf(stderr, fmt, cpustr, avg, csv_sep, event_name(evsel));
440
441 if (evsel->cgrp)
442 fprintf(stderr, "%s%s", csv_sep, evsel->cgrp->name);
443
444 if (csv_output)
445 return;
446
447 if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
448 total = avg_stats(&runtime_cycles_stats[cpu]);
449
450 if (total)
451 ratio = avg / total;
452
453 fprintf(stderr, " # ( %4.2f instructions per cycle )", ratio);
454 } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
455 runtime_branches_stats[cpu].n != 0) {
456 total = avg_stats(&runtime_branches_stats[cpu]);
457
458 if (total)
459 ratio = avg * 100 / total;
460
461 fprintf(stderr, " # %10.3f %%", ratio);
462
463 } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
464 runtime_cacherefs_stats[cpu].n != 0) {
465 total = avg_stats(&runtime_cacherefs_stats[cpu]);
466
467 if (total)
468 ratio = avg * 100 / total;
469
470 fprintf(stderr, " # %10.3f %%", ratio);
471
472 } else if (runtime_nsecs_stats[cpu].n != 0) {
473 total = avg_stats(&runtime_nsecs_stats[cpu]);
474
475 if (total)
476 ratio = 1000.0 * avg / total;
477
478 fprintf(stderr, " # %10.3f M/sec", ratio);
479 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES)) {
480 total = avg_stats(&runtime_cycles_stats[cpu]);
481
482 if (total)
483 ratio = avg / total * 100.0;
484
485 fprintf(stderr, " # (%5.2f%% of all cycles )", ratio);
486 }
487}
488
489/*
490 * Print out the results of a single counter:
491 * aggregated counts in system-wide mode
492 */
493static void print_counter_aggr(struct perf_evsel *counter)
494{
495 struct perf_stat *ps = counter->priv;
496 double avg = avg_stats(&ps->res_stats[0]);
497 int scaled = counter->counts->scaled;
498
499 if (scaled == -1) {
500 fprintf(stderr, "%*s%s%*s",
501 csv_output ? 0 : 18,
502 "<not counted>",
503 csv_sep,
504 csv_output ? 0 : -24,
505 event_name(counter));
506
507 if (counter->cgrp)
508 fprintf(stderr, "%s%s", csv_sep, counter->cgrp->name);
509
510 fputc('\n', stderr);
511 return;
512 }
513
514 if (nsec_counter(counter))
515 nsec_printout(-1, counter, avg);
516 else
517 abs_printout(-1, counter, avg);
518
519 if (csv_output) {
520 fputc('\n', stderr);
521 return;
522 }
523
524 print_noise(counter, avg);
525
526 if (scaled) {
527 double avg_enabled, avg_running;
528
529 avg_enabled = avg_stats(&ps->res_stats[1]);
530 avg_running = avg_stats(&ps->res_stats[2]);
531
532 fprintf(stderr, " (scaled from %.2f%%)",
533 100 * avg_running / avg_enabled);
534 }
535 fprintf(stderr, "\n");
536}
537
538/*
539 * Print out the results of a single counter:
540 * does not use aggregated count in system-wide
541 */
542static void print_counter(struct perf_evsel *counter)
543{
544 u64 ena, run, val;
545 int cpu;
546
547 for (cpu = 0; cpu < evsel_list->cpus->nr; cpu++) {
548 val = counter->counts->cpu[cpu].val;
549 ena = counter->counts->cpu[cpu].ena;
550 run = counter->counts->cpu[cpu].run;
551 if (run == 0 || ena == 0) {
552 fprintf(stderr, "CPU%*d%s%*s%s%*s",
553 csv_output ? 0 : -4,
554 evsel_list->cpus->map[cpu], csv_sep,
555 csv_output ? 0 : 18,
556 "<not counted>", csv_sep,
557 csv_output ? 0 : -24,
558 event_name(counter));
559
560 if (counter->cgrp)
561 fprintf(stderr, "%s%s", csv_sep, counter->cgrp->name);
562
563 fputc('\n', stderr);
564 continue;
565 }
566
567 if (nsec_counter(counter))
568 nsec_printout(cpu, counter, val);
569 else
570 abs_printout(cpu, counter, val);
571
572 if (!csv_output) {
573 print_noise(counter, 1.0);
574
575 if (run != ena) {
576 fprintf(stderr, " (scaled from %.2f%%)",
577 100.0 * run / ena);
578 }
579 }
580 fputc('\n', stderr);
581 }
582}
583
584static void print_stat(int argc, const char **argv)
585{
586 struct perf_evsel *counter;
587 int i;
588
589 fflush(stdout);
590
591 if (!csv_output) {
592 fprintf(stderr, "\n");
593 fprintf(stderr, " Performance counter stats for ");
594 if(target_pid == -1 && target_tid == -1) {
595 fprintf(stderr, "\'%s", argv[0]);
596 for (i = 1; i < argc; i++)
597 fprintf(stderr, " %s", argv[i]);
598 } else if (target_pid != -1)
599 fprintf(stderr, "process id \'%d", target_pid);
600 else
601 fprintf(stderr, "thread id \'%d", target_tid);
602
603 fprintf(stderr, "\'");
604 if (run_count > 1)
605 fprintf(stderr, " (%d runs)", run_count);
606 fprintf(stderr, ":\n\n");
607 }
608
609 if (no_aggr) {
610 list_for_each_entry(counter, &evsel_list->entries, node)
611 print_counter(counter);
612 } else {
613 list_for_each_entry(counter, &evsel_list->entries, node)
614 print_counter_aggr(counter);
615 }
616
617 if (!csv_output) {
618 fprintf(stderr, "\n");
619 fprintf(stderr, " %18.9f seconds time elapsed",
620 avg_stats(&walltime_nsecs_stats)/1e9);
621 if (run_count > 1) {
622 fprintf(stderr, " ( +- %7.3f%% )",
623 100*stddev_stats(&walltime_nsecs_stats) /
624 avg_stats(&walltime_nsecs_stats));
625 }
626 fprintf(stderr, "\n\n");
627 }
628}
629
630static volatile int signr = -1;
631
632static void skip_signal(int signo)
633{
634 if(child_pid == -1)
635 done = 1;
636
637 signr = signo;
638}
639
640static void sig_atexit(void)
641{
642 if (child_pid != -1)
643 kill(child_pid, SIGTERM);
644
645 if (signr == -1)
646 return;
647
648 signal(signr, SIG_DFL);
649 kill(getpid(), signr);
650}
651
652static const char * const stat_usage[] = {
653 "perf stat [<options>] [<command>]",
654 NULL
655};
656
657static int stat__set_big_num(const struct option *opt __used,
658 const char *s __used, int unset)
659{
660 big_num_opt = unset ? 0 : 1;
661 return 0;
662}
663
664static const struct option options[] = {
665 OPT_CALLBACK('e', "event", &evsel_list, "event",
666 "event selector. use 'perf list' to list available events",
667 parse_events),
668 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
669 "event filter", parse_filter),
670 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
671 "child tasks do not inherit counters"),
672 OPT_INTEGER('p', "pid", &target_pid,
673 "stat events on existing process id"),
674 OPT_INTEGER('t', "tid", &target_tid,
675 "stat events on existing thread id"),
676 OPT_BOOLEAN('a', "all-cpus", &system_wide,
677 "system-wide collection from all CPUs"),
678 OPT_BOOLEAN('c', "scale", &scale,
679 "scale/normalize counters"),
680 OPT_INCR('v', "verbose", &verbose,
681 "be more verbose (show counter open errors, etc)"),
682 OPT_INTEGER('r', "repeat", &run_count,
683 "repeat command and print average + stddev (max: 100)"),
684 OPT_BOOLEAN('n', "null", &null_run,
685 "null run - dont start any counters"),
686 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
687 "print large numbers with thousands\' separators",
688 stat__set_big_num),
689 OPT_STRING('C', "cpu", &cpu_list, "cpu",
690 "list of cpus to monitor in system-wide"),
691 OPT_BOOLEAN('A', "no-aggr", &no_aggr,
692 "disable CPU count aggregation"),
693 OPT_STRING('x', "field-separator", &csv_sep, "separator",
694 "print counts with custom separator"),
695 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
696 "monitor event in cgroup name only",
697 parse_cgroups),
698 OPT_END()
699};
700
701int cmd_stat(int argc, const char **argv, const char *prefix __used)
702{
703 struct perf_evsel *pos;
704 int status = -ENOMEM;
705
706 setlocale(LC_ALL, "");
707
708 evsel_list = perf_evlist__new(NULL, NULL);
709 if (evsel_list == NULL)
710 return -ENOMEM;
711
712 argc = parse_options(argc, argv, options, stat_usage,
713 PARSE_OPT_STOP_AT_NON_OPTION);
714
715 if (csv_sep)
716 csv_output = true;
717 else
718 csv_sep = DEFAULT_SEPARATOR;
719
720 /*
721 * let the spreadsheet do the pretty-printing
722 */
723 if (csv_output) {
724 /* User explicitely passed -B? */
725 if (big_num_opt == 1) {
726 fprintf(stderr, "-B option not supported with -x\n");
727 usage_with_options(stat_usage, options);
728 } else /* Nope, so disable big number formatting */
729 big_num = false;
730 } else if (big_num_opt == 0) /* User passed --no-big-num */
731 big_num = false;
732
733 if (!argc && target_pid == -1 && target_tid == -1)
734 usage_with_options(stat_usage, options);
735 if (run_count <= 0)
736 usage_with_options(stat_usage, options);
737
738 /* no_aggr, cgroup are for system-wide only */
739 if ((no_aggr || nr_cgroups) && !system_wide) {
740 fprintf(stderr, "both cgroup and no-aggregation "
741 "modes only available in system-wide mode\n");
742
743 usage_with_options(stat_usage, options);
744 }
745
746 /* Set attrs and nr_counters if no event is selected and !null_run */
747 if (!null_run && !evsel_list->nr_entries) {
748 size_t c;
749
750 for (c = 0; c < ARRAY_SIZE(default_attrs); ++c) {
751 pos = perf_evsel__new(&default_attrs[c], c);
752 if (pos == NULL)
753 goto out;
754 perf_evlist__add(evsel_list, pos);
755 }
756 }
757
758 if (target_pid != -1)
759 target_tid = target_pid;
760
761 evsel_list->threads = thread_map__new(target_pid, target_tid);
762 if (evsel_list->threads == NULL) {
763 pr_err("Problems finding threads of monitor\n");
764 usage_with_options(stat_usage, options);
765 }
766
767 if (system_wide)
768 evsel_list->cpus = cpu_map__new(cpu_list);
769 else
770 evsel_list->cpus = cpu_map__dummy_new();
771
772 if (evsel_list->cpus == NULL) {
773 perror("failed to parse CPUs map");
774 usage_with_options(stat_usage, options);
775 return -1;
776 }
777
778 list_for_each_entry(pos, &evsel_list->entries, node) {
779 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
780 perf_evsel__alloc_counts(pos, evsel_list->cpus->nr) < 0 ||
781 perf_evsel__alloc_fd(pos, evsel_list->cpus->nr, evsel_list->threads->nr) < 0)
782 goto out_free_fd;
783 }
784
785 /*
786 * We dont want to block the signals - that would cause
787 * child tasks to inherit that and Ctrl-C would not work.
788 * What we want is for Ctrl-C to work in the exec()-ed
789 * task, but being ignored by perf stat itself:
790 */
791 atexit(sig_atexit);
792 signal(SIGINT, skip_signal);
793 signal(SIGALRM, skip_signal);
794 signal(SIGABRT, skip_signal);
795
796 status = 0;
797 for (run_idx = 0; run_idx < run_count; run_idx++) {
798 if (run_count != 1 && verbose)
799 fprintf(stderr, "[ perf stat: executing run #%d ... ]\n", run_idx + 1);
800 status = run_perf_stat(argc, argv);
801 }
802
803 if (status != -1)
804 print_stat(argc, argv);
805out_free_fd:
806 list_for_each_entry(pos, &evsel_list->entries, node)
807 perf_evsel__free_stat_priv(pos);
808 perf_evlist__delete_maps(evsel_list);
809out:
810 perf_evlist__delete(evsel_list);
811 return status;
812}
kernel source for telekom puls (alcatel/mediatek)