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