perf stat: Introduce --repeat forever
[linux-3.10.git] / tools / perf / builtin-stat.c
1 /*
2  * builtin-stat.c
3  *
4  * Builtin stat command: Give a precise performance counters summary
5  * overview about any workload, CPU or specific PID.
6  *
7  * Sample output:
8
9    $ perf stat ./hackbench 10
10
11   Time: 0.118
12
13   Performance counter stats for './hackbench 10':
14
15        1708.761321 task-clock                #   11.037 CPUs utilized
16             41,190 context-switches          #    0.024 M/sec
17              6,735 CPU-migrations            #    0.004 M/sec
18             17,318 page-faults               #    0.010 M/sec
19      5,205,202,243 cycles                    #    3.046 GHz
20      3,856,436,920 stalled-cycles-frontend   #   74.09% frontend cycles idle
21      1,600,790,871 stalled-cycles-backend    #   30.75% backend  cycles idle
22      2,603,501,247 instructions              #    0.50  insns per cycle
23                                              #    1.48  stalled cycles per insn
24        484,357,498 branches                  #  283.455 M/sec
25          6,388,934 branch-misses             #    1.32% of all branches
26
27         0.154822978  seconds time elapsed
28
29  *
30  * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
31  *
32  * Improvements and fixes by:
33  *
34  *   Arjan van de Ven <arjan@linux.intel.com>
35  *   Yanmin Zhang <yanmin.zhang@intel.com>
36  *   Wu Fengguang <fengguang.wu@intel.com>
37  *   Mike Galbraith <efault@gmx.de>
38  *   Paul Mackerras <paulus@samba.org>
39  *   Jaswinder Singh Rajput <jaswinder@kernel.org>
40  *
41  * Released under the GPL v2. (and only v2, not any later version)
42  */
43
44 #include "perf.h"
45 #include "builtin.h"
46 #include "util/util.h"
47 #include "util/parse-options.h"
48 #include "util/parse-events.h"
49 #include "util/event.h"
50 #include "util/evlist.h"
51 #include "util/evsel.h"
52 #include "util/debug.h"
53 #include "util/color.h"
54 #include "util/stat.h"
55 #include "util/header.h"
56 #include "util/cpumap.h"
57 #include "util/thread.h"
58 #include "util/thread_map.h"
59
60 #include <stdlib.h>
61 #include <sys/prctl.h>
62 #include <locale.h>
63
64 #define DEFAULT_SEPARATOR       " "
65 #define CNTR_NOT_SUPPORTED      "<not supported>"
66 #define CNTR_NOT_COUNTED        "<not counted>"
67
68 static void print_stat(int argc, const char **argv);
69 static void print_counter_aggr(struct perf_evsel *counter, char *prefix);
70 static void print_counter(struct perf_evsel *counter, char *prefix);
71 static void print_aggr_socket(char *prefix);
72
73 static struct perf_evlist       *evsel_list;
74
75 static struct perf_target       target = {
76         .uid    = UINT_MAX,
77 };
78
79 static int                      run_count                       =  1;
80 static bool                     no_inherit                      = false;
81 static bool                     scale                           =  true;
82 static bool                     no_aggr                         = false;
83 static bool                     aggr_socket                     = false;
84 static pid_t                    child_pid                       = -1;
85 static bool                     null_run                        =  false;
86 static int                      detailed_run                    =  0;
87 static bool                     big_num                         =  true;
88 static int                      big_num_opt                     =  -1;
89 static const char               *csv_sep                        = NULL;
90 static bool                     csv_output                      = false;
91 static bool                     group                           = false;
92 static FILE                     *output                         = NULL;
93 static const char               *pre_cmd                        = NULL;
94 static const char               *post_cmd                       = NULL;
95 static bool                     sync_run                        = false;
96 static unsigned int             interval                        = 0;
97 static bool                     forever                         = false;
98 static struct timespec          ref_time;
99 static struct cpu_map           *sock_map;
100
101 static volatile int done = 0;
102
103 struct perf_stat {
104         struct stats      res_stats[3];
105 };
106
107 static inline void diff_timespec(struct timespec *r, struct timespec *a,
108                                  struct timespec *b)
109 {
110         r->tv_sec = a->tv_sec - b->tv_sec;
111         if (a->tv_nsec < b->tv_nsec) {
112                 r->tv_nsec = a->tv_nsec + 1000000000L - b->tv_nsec;
113                 r->tv_sec--;
114         } else {
115                 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
116         }
117 }
118
119 static inline struct cpu_map *perf_evsel__cpus(struct perf_evsel *evsel)
120 {
121         return (evsel->cpus && !target.cpu_list) ? evsel->cpus : evsel_list->cpus;
122 }
123
124 static inline int perf_evsel__nr_cpus(struct perf_evsel *evsel)
125 {
126         return perf_evsel__cpus(evsel)->nr;
127 }
128
129 static void perf_evsel__reset_stat_priv(struct perf_evsel *evsel)
130 {
131         memset(evsel->priv, 0, sizeof(struct perf_stat));
132 }
133
134 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
135 {
136         evsel->priv = zalloc(sizeof(struct perf_stat));
137         return evsel->priv == NULL ? -ENOMEM : 0;
138 }
139
140 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
141 {
142         free(evsel->priv);
143         evsel->priv = NULL;
144 }
145
146 static int perf_evsel__alloc_prev_raw_counts(struct perf_evsel *evsel)
147 {
148         void *addr;
149         size_t sz;
150
151         sz = sizeof(*evsel->counts) +
152              (perf_evsel__nr_cpus(evsel) * sizeof(struct perf_counts_values));
153
154         addr = zalloc(sz);
155         if (!addr)
156                 return -ENOMEM;
157
158         evsel->prev_raw_counts =  addr;
159
160         return 0;
161 }
162
163 static void perf_evsel__free_prev_raw_counts(struct perf_evsel *evsel)
164 {
165         free(evsel->prev_raw_counts);
166         evsel->prev_raw_counts = NULL;
167 }
168
169 static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
170 static struct stats runtime_cycles_stats[MAX_NR_CPUS];
171 static struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
172 static struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
173 static struct stats runtime_branches_stats[MAX_NR_CPUS];
174 static struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
175 static struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
176 static struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
177 static struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
178 static struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
179 static struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
180 static struct stats walltime_nsecs_stats;
181
182 static void reset_stats(void)
183 {
184         memset(runtime_nsecs_stats, 0, sizeof(runtime_nsecs_stats));
185         memset(runtime_cycles_stats, 0, sizeof(runtime_cycles_stats));
186         memset(runtime_stalled_cycles_front_stats, 0, sizeof(runtime_stalled_cycles_front_stats));
187         memset(runtime_stalled_cycles_back_stats, 0, sizeof(runtime_stalled_cycles_back_stats));
188         memset(runtime_branches_stats, 0, sizeof(runtime_branches_stats));
189         memset(runtime_cacherefs_stats, 0, sizeof(runtime_cacherefs_stats));
190         memset(runtime_l1_dcache_stats, 0, sizeof(runtime_l1_dcache_stats));
191         memset(runtime_l1_icache_stats, 0, sizeof(runtime_l1_icache_stats));
192         memset(runtime_ll_cache_stats, 0, sizeof(runtime_ll_cache_stats));
193         memset(runtime_itlb_cache_stats, 0, sizeof(runtime_itlb_cache_stats));
194         memset(runtime_dtlb_cache_stats, 0, sizeof(runtime_dtlb_cache_stats));
195         memset(&walltime_nsecs_stats, 0, sizeof(walltime_nsecs_stats));
196 }
197
198 static int create_perf_stat_counter(struct perf_evsel *evsel)
199 {
200         struct perf_event_attr *attr = &evsel->attr;
201
202         if (scale)
203                 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
204                                     PERF_FORMAT_TOTAL_TIME_RUNNING;
205
206         attr->inherit = !no_inherit;
207
208         if (perf_target__has_cpu(&target))
209                 return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
210
211         if (!perf_target__has_task(&target) &&
212             perf_evsel__is_group_leader(evsel)) {
213                 attr->disabled = 1;
214                 attr->enable_on_exec = 1;
215         }
216
217         return perf_evsel__open_per_thread(evsel, evsel_list->threads);
218 }
219
220 /*
221  * Does the counter have nsecs as a unit?
222  */
223 static inline int nsec_counter(struct perf_evsel *evsel)
224 {
225         if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
226             perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
227                 return 1;
228
229         return 0;
230 }
231
232 /*
233  * Update various tracking values we maintain to print
234  * more semantic information such as miss/hit ratios,
235  * instruction rates, etc:
236  */
237 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
238 {
239         if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
240                 update_stats(&runtime_nsecs_stats[0], count[0]);
241         else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
242                 update_stats(&runtime_cycles_stats[0], count[0]);
243         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
244                 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
245         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
246                 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
247         else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
248                 update_stats(&runtime_branches_stats[0], count[0]);
249         else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
250                 update_stats(&runtime_cacherefs_stats[0], count[0]);
251         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
252                 update_stats(&runtime_l1_dcache_stats[0], count[0]);
253         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
254                 update_stats(&runtime_l1_icache_stats[0], count[0]);
255         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
256                 update_stats(&runtime_ll_cache_stats[0], count[0]);
257         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
258                 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
259         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
260                 update_stats(&runtime_itlb_cache_stats[0], count[0]);
261 }
262
263 /*
264  * Read out the results of a single counter:
265  * aggregate counts across CPUs in system-wide mode
266  */
267 static int read_counter_aggr(struct perf_evsel *counter)
268 {
269         struct perf_stat *ps = counter->priv;
270         u64 *count = counter->counts->aggr.values;
271         int i;
272
273         if (__perf_evsel__read(counter, perf_evsel__nr_cpus(counter),
274                                thread_map__nr(evsel_list->threads), scale) < 0)
275                 return -1;
276
277         for (i = 0; i < 3; i++)
278                 update_stats(&ps->res_stats[i], count[i]);
279
280         if (verbose) {
281                 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
282                         perf_evsel__name(counter), count[0], count[1], count[2]);
283         }
284
285         /*
286          * Save the full runtime - to allow normalization during printout:
287          */
288         update_shadow_stats(counter, count);
289
290         return 0;
291 }
292
293 /*
294  * Read out the results of a single counter:
295  * do not aggregate counts across CPUs in system-wide mode
296  */
297 static int read_counter(struct perf_evsel *counter)
298 {
299         u64 *count;
300         int cpu;
301
302         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
303                 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
304                         return -1;
305
306                 count = counter->counts->cpu[cpu].values;
307
308                 update_shadow_stats(counter, count);
309         }
310
311         return 0;
312 }
313
314 static void print_interval(void)
315 {
316         static int num_print_interval;
317         struct perf_evsel *counter;
318         struct perf_stat *ps;
319         struct timespec ts, rs;
320         char prefix[64];
321
322         if (no_aggr) {
323                 list_for_each_entry(counter, &evsel_list->entries, node) {
324                         ps = counter->priv;
325                         memset(ps->res_stats, 0, sizeof(ps->res_stats));
326                         read_counter(counter);
327                 }
328         } else {
329                 list_for_each_entry(counter, &evsel_list->entries, node) {
330                         ps = counter->priv;
331                         memset(ps->res_stats, 0, sizeof(ps->res_stats));
332                         read_counter_aggr(counter);
333                 }
334         }
335         clock_gettime(CLOCK_MONOTONIC, &ts);
336         diff_timespec(&rs, &ts, &ref_time);
337         sprintf(prefix, "%6lu.%09lu%s", rs.tv_sec, rs.tv_nsec, csv_sep);
338
339         if (num_print_interval == 0 && !csv_output) {
340                 if (aggr_socket)
341                         fprintf(output, "#           time socket cpus             counts events\n");
342                 else if (no_aggr)
343                         fprintf(output, "#           time CPU                 counts events\n");
344                 else
345                         fprintf(output, "#           time             counts events\n");
346         }
347
348         if (++num_print_interval == 25)
349                 num_print_interval = 0;
350
351         if (aggr_socket)
352                 print_aggr_socket(prefix);
353         else if (no_aggr) {
354                 list_for_each_entry(counter, &evsel_list->entries, node)
355                         print_counter(counter, prefix);
356         } else {
357                 list_for_each_entry(counter, &evsel_list->entries, node)
358                         print_counter_aggr(counter, prefix);
359         }
360 }
361
362 static int __run_perf_stat(int argc, const char **argv)
363 {
364         char msg[512];
365         unsigned long long t0, t1;
366         struct perf_evsel *counter;
367         struct timespec ts;
368         int status = 0;
369         const bool forks = (argc > 0);
370
371         if (interval) {
372                 ts.tv_sec  = interval / 1000;
373                 ts.tv_nsec = (interval % 1000) * 1000000;
374         } else {
375                 ts.tv_sec  = 1;
376                 ts.tv_nsec = 0;
377         }
378
379         if (aggr_socket
380             && cpu_map__build_socket_map(evsel_list->cpus, &sock_map)) {
381                 perror("cannot build socket map");
382                 return -1;
383         }
384
385         if (forks) {
386                 if (perf_evlist__prepare_workload(evsel_list, &target, argv,
387                                                   false, false) < 0) {
388                         perror("failed to prepare workload");
389                         return -1;
390                 }
391         }
392
393         if (group)
394                 perf_evlist__set_leader(evsel_list);
395
396         list_for_each_entry(counter, &evsel_list->entries, node) {
397                 if (create_perf_stat_counter(counter) < 0) {
398                         /*
399                          * PPC returns ENXIO for HW counters until 2.6.37
400                          * (behavior changed with commit b0a873e).
401                          */
402                         if (errno == EINVAL || errno == ENOSYS ||
403                             errno == ENOENT || errno == EOPNOTSUPP ||
404                             errno == ENXIO) {
405                                 if (verbose)
406                                         ui__warning("%s event is not supported by the kernel.\n",
407                                                     perf_evsel__name(counter));
408                                 counter->supported = false;
409                                 continue;
410                         }
411
412                         perf_evsel__open_strerror(counter, &target,
413                                                   errno, msg, sizeof(msg));
414                         ui__error("%s\n", msg);
415
416                         if (child_pid != -1)
417                                 kill(child_pid, SIGTERM);
418
419                         return -1;
420                 }
421                 counter->supported = true;
422         }
423
424         if (perf_evlist__apply_filters(evsel_list)) {
425                 error("failed to set filter with %d (%s)\n", errno,
426                         strerror(errno));
427                 return -1;
428         }
429
430         /*
431          * Enable counters and exec the command:
432          */
433         t0 = rdclock();
434         clock_gettime(CLOCK_MONOTONIC, &ref_time);
435
436         if (forks) {
437                 perf_evlist__start_workload(evsel_list);
438
439                 if (interval) {
440                         while (!waitpid(child_pid, &status, WNOHANG)) {
441                                 nanosleep(&ts, NULL);
442                                 print_interval();
443                         }
444                 }
445                 wait(&status);
446                 if (WIFSIGNALED(status))
447                         psignal(WTERMSIG(status), argv[0]);
448         } else {
449                 while (!done) {
450                         nanosleep(&ts, NULL);
451                         if (interval)
452                                 print_interval();
453                 }
454         }
455
456         t1 = rdclock();
457
458         update_stats(&walltime_nsecs_stats, t1 - t0);
459
460         if (no_aggr) {
461                 list_for_each_entry(counter, &evsel_list->entries, node) {
462                         read_counter(counter);
463                         perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
464                 }
465         } else {
466                 list_for_each_entry(counter, &evsel_list->entries, node) {
467                         read_counter_aggr(counter);
468                         perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
469                                              thread_map__nr(evsel_list->threads));
470                 }
471         }
472
473         return WEXITSTATUS(status);
474 }
475
476 static int run_perf_stat(int argc __maybe_unused, const char **argv)
477 {
478         int ret;
479
480         if (pre_cmd) {
481                 ret = system(pre_cmd);
482                 if (ret)
483                         return ret;
484         }
485
486         if (sync_run)
487                 sync();
488
489         ret = __run_perf_stat(argc, argv);
490         if (ret)
491                 return ret;
492
493         if (post_cmd) {
494                 ret = system(post_cmd);
495                 if (ret)
496                         return ret;
497         }
498
499         return ret;
500 }
501
502 static void print_noise_pct(double total, double avg)
503 {
504         double pct = rel_stddev_stats(total, avg);
505
506         if (csv_output)
507                 fprintf(output, "%s%.2f%%", csv_sep, pct);
508         else if (pct)
509                 fprintf(output, "  ( +-%6.2f%% )", pct);
510 }
511
512 static void print_noise(struct perf_evsel *evsel, double avg)
513 {
514         struct perf_stat *ps;
515
516         if (run_count == 1)
517                 return;
518
519         ps = evsel->priv;
520         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
521 }
522
523 static void nsec_printout(int cpu, int nr, struct perf_evsel *evsel, double avg)
524 {
525         double msecs = avg / 1e6;
526         char cpustr[16] = { '\0', };
527         const char *fmt = csv_output ? "%s%.6f%s%s" : "%s%18.6f%s%-25s";
528
529         if (aggr_socket)
530                 sprintf(cpustr, "S%*d%s%*d%s",
531                         csv_output ? 0 : -5,
532                         cpu,
533                         csv_sep,
534                         csv_output ? 0 : 4,
535                         nr,
536                         csv_sep);
537         else if (no_aggr)
538                 sprintf(cpustr, "CPU%*d%s",
539                         csv_output ? 0 : -4,
540                         perf_evsel__cpus(evsel)->map[cpu], csv_sep);
541
542         fprintf(output, fmt, cpustr, msecs, csv_sep, perf_evsel__name(evsel));
543
544         if (evsel->cgrp)
545                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
546
547         if (csv_output || interval)
548                 return;
549
550         if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
551                 fprintf(output, " # %8.3f CPUs utilized          ",
552                         avg / avg_stats(&walltime_nsecs_stats));
553         else
554                 fprintf(output, "                                   ");
555 }
556
557 /* used for get_ratio_color() */
558 enum grc_type {
559         GRC_STALLED_CYCLES_FE,
560         GRC_STALLED_CYCLES_BE,
561         GRC_CACHE_MISSES,
562         GRC_MAX_NR
563 };
564
565 static const char *get_ratio_color(enum grc_type type, double ratio)
566 {
567         static const double grc_table[GRC_MAX_NR][3] = {
568                 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
569                 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
570                 [GRC_CACHE_MISSES]      = { 20.0, 10.0, 5.0 },
571         };
572         const char *color = PERF_COLOR_NORMAL;
573
574         if (ratio > grc_table[type][0])
575                 color = PERF_COLOR_RED;
576         else if (ratio > grc_table[type][1])
577                 color = PERF_COLOR_MAGENTA;
578         else if (ratio > grc_table[type][2])
579                 color = PERF_COLOR_YELLOW;
580
581         return color;
582 }
583
584 static void print_stalled_cycles_frontend(int cpu,
585                                           struct perf_evsel *evsel
586                                           __maybe_unused, double avg)
587 {
588         double total, ratio = 0.0;
589         const char *color;
590
591         total = avg_stats(&runtime_cycles_stats[cpu]);
592
593         if (total)
594                 ratio = avg / total * 100.0;
595
596         color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
597
598         fprintf(output, " #  ");
599         color_fprintf(output, color, "%6.2f%%", ratio);
600         fprintf(output, " frontend cycles idle   ");
601 }
602
603 static void print_stalled_cycles_backend(int cpu,
604                                          struct perf_evsel *evsel
605                                          __maybe_unused, double avg)
606 {
607         double total, ratio = 0.0;
608         const char *color;
609
610         total = avg_stats(&runtime_cycles_stats[cpu]);
611
612         if (total)
613                 ratio = avg / total * 100.0;
614
615         color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
616
617         fprintf(output, " #  ");
618         color_fprintf(output, color, "%6.2f%%", ratio);
619         fprintf(output, " backend  cycles idle   ");
620 }
621
622 static void print_branch_misses(int cpu,
623                                 struct perf_evsel *evsel __maybe_unused,
624                                 double avg)
625 {
626         double total, ratio = 0.0;
627         const char *color;
628
629         total = avg_stats(&runtime_branches_stats[cpu]);
630
631         if (total)
632                 ratio = avg / total * 100.0;
633
634         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
635
636         fprintf(output, " #  ");
637         color_fprintf(output, color, "%6.2f%%", ratio);
638         fprintf(output, " of all branches        ");
639 }
640
641 static void print_l1_dcache_misses(int cpu,
642                                    struct perf_evsel *evsel __maybe_unused,
643                                    double avg)
644 {
645         double total, ratio = 0.0;
646         const char *color;
647
648         total = avg_stats(&runtime_l1_dcache_stats[cpu]);
649
650         if (total)
651                 ratio = avg / total * 100.0;
652
653         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
654
655         fprintf(output, " #  ");
656         color_fprintf(output, color, "%6.2f%%", ratio);
657         fprintf(output, " of all L1-dcache hits  ");
658 }
659
660 static void print_l1_icache_misses(int cpu,
661                                    struct perf_evsel *evsel __maybe_unused,
662                                    double avg)
663 {
664         double total, ratio = 0.0;
665         const char *color;
666
667         total = avg_stats(&runtime_l1_icache_stats[cpu]);
668
669         if (total)
670                 ratio = avg / total * 100.0;
671
672         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
673
674         fprintf(output, " #  ");
675         color_fprintf(output, color, "%6.2f%%", ratio);
676         fprintf(output, " of all L1-icache hits  ");
677 }
678
679 static void print_dtlb_cache_misses(int cpu,
680                                     struct perf_evsel *evsel __maybe_unused,
681                                     double avg)
682 {
683         double total, ratio = 0.0;
684         const char *color;
685
686         total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
687
688         if (total)
689                 ratio = avg / total * 100.0;
690
691         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
692
693         fprintf(output, " #  ");
694         color_fprintf(output, color, "%6.2f%%", ratio);
695         fprintf(output, " of all dTLB cache hits ");
696 }
697
698 static void print_itlb_cache_misses(int cpu,
699                                     struct perf_evsel *evsel __maybe_unused,
700                                     double avg)
701 {
702         double total, ratio = 0.0;
703         const char *color;
704
705         total = avg_stats(&runtime_itlb_cache_stats[cpu]);
706
707         if (total)
708                 ratio = avg / total * 100.0;
709
710         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
711
712         fprintf(output, " #  ");
713         color_fprintf(output, color, "%6.2f%%", ratio);
714         fprintf(output, " of all iTLB cache hits ");
715 }
716
717 static void print_ll_cache_misses(int cpu,
718                                   struct perf_evsel *evsel __maybe_unused,
719                                   double avg)
720 {
721         double total, ratio = 0.0;
722         const char *color;
723
724         total = avg_stats(&runtime_ll_cache_stats[cpu]);
725
726         if (total)
727                 ratio = avg / total * 100.0;
728
729         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
730
731         fprintf(output, " #  ");
732         color_fprintf(output, color, "%6.2f%%", ratio);
733         fprintf(output, " of all LL-cache hits   ");
734 }
735
736 static void abs_printout(int cpu, int nr, struct perf_evsel *evsel, double avg)
737 {
738         double total, ratio = 0.0;
739         char cpustr[16] = { '\0', };
740         const char *fmt;
741
742         if (csv_output)
743                 fmt = "%s%.0f%s%s";
744         else if (big_num)
745                 fmt = "%s%'18.0f%s%-25s";
746         else
747                 fmt = "%s%18.0f%s%-25s";
748
749         if (aggr_socket)
750                 sprintf(cpustr, "S%*d%s%*d%s",
751                         csv_output ? 0 : -5,
752                         cpu,
753                         csv_sep,
754                         csv_output ? 0 : 4,
755                         nr,
756                         csv_sep);
757         else if (no_aggr)
758                 sprintf(cpustr, "CPU%*d%s",
759                         csv_output ? 0 : -4,
760                         perf_evsel__cpus(evsel)->map[cpu], csv_sep);
761         else
762                 cpu = 0;
763
764         fprintf(output, fmt, cpustr, avg, csv_sep, perf_evsel__name(evsel));
765
766         if (evsel->cgrp)
767                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
768
769         if (csv_output || interval)
770                 return;
771
772         if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
773                 total = avg_stats(&runtime_cycles_stats[cpu]);
774                 if (total)
775                         ratio = avg / total;
776
777                 fprintf(output, " #   %5.2f  insns per cycle        ", ratio);
778
779                 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
780                 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
781
782                 if (total && avg) {
783                         ratio = total / avg;
784                         fprintf(output, "\n                                             #   %5.2f  stalled cycles per insn", ratio);
785                 }
786
787         } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
788                         runtime_branches_stats[cpu].n != 0) {
789                 print_branch_misses(cpu, evsel, avg);
790         } else if (
791                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
792                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1D |
793                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
794                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
795                         runtime_l1_dcache_stats[cpu].n != 0) {
796                 print_l1_dcache_misses(cpu, evsel, avg);
797         } else if (
798                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
799                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1I |
800                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
801                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
802                         runtime_l1_icache_stats[cpu].n != 0) {
803                 print_l1_icache_misses(cpu, evsel, avg);
804         } else if (
805                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
806                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_DTLB |
807                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
808                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
809                         runtime_dtlb_cache_stats[cpu].n != 0) {
810                 print_dtlb_cache_misses(cpu, evsel, avg);
811         } else if (
812                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
813                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_ITLB |
814                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
815                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
816                         runtime_itlb_cache_stats[cpu].n != 0) {
817                 print_itlb_cache_misses(cpu, evsel, avg);
818         } else if (
819                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
820                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_LL |
821                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
822                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
823                         runtime_ll_cache_stats[cpu].n != 0) {
824                 print_ll_cache_misses(cpu, evsel, avg);
825         } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
826                         runtime_cacherefs_stats[cpu].n != 0) {
827                 total = avg_stats(&runtime_cacherefs_stats[cpu]);
828
829                 if (total)
830                         ratio = avg * 100 / total;
831
832                 fprintf(output, " # %8.3f %% of all cache refs    ", ratio);
833
834         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
835                 print_stalled_cycles_frontend(cpu, evsel, avg);
836         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
837                 print_stalled_cycles_backend(cpu, evsel, avg);
838         } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
839                 total = avg_stats(&runtime_nsecs_stats[cpu]);
840
841                 if (total)
842                         ratio = 1.0 * avg / total;
843
844                 fprintf(output, " # %8.3f GHz                    ", ratio);
845         } else if (runtime_nsecs_stats[cpu].n != 0) {
846                 char unit = 'M';
847
848                 total = avg_stats(&runtime_nsecs_stats[cpu]);
849
850                 if (total)
851                         ratio = 1000.0 * avg / total;
852                 if (ratio < 0.001) {
853                         ratio *= 1000;
854                         unit = 'K';
855                 }
856
857                 fprintf(output, " # %8.3f %c/sec                  ", ratio, unit);
858         } else {
859                 fprintf(output, "                                   ");
860         }
861 }
862
863 static void print_aggr_socket(char *prefix)
864 {
865         struct perf_evsel *counter;
866         u64 ena, run, val;
867         int cpu, s, s2, sock, nr;
868
869         if (!sock_map)
870                 return;
871
872         for (s = 0; s < sock_map->nr; s++) {
873                 sock = cpu_map__socket(sock_map, s);
874                 list_for_each_entry(counter, &evsel_list->entries, node) {
875                         val = ena = run = 0;
876                         nr = 0;
877                         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
878                                 s2 = cpu_map__get_socket(evsel_list->cpus, cpu);
879                                 if (s2 != sock)
880                                         continue;
881                                 val += counter->counts->cpu[cpu].val;
882                                 ena += counter->counts->cpu[cpu].ena;
883                                 run += counter->counts->cpu[cpu].run;
884                                 nr++;
885                         }
886                         if (prefix)
887                                 fprintf(output, "%s", prefix);
888
889                         if (run == 0 || ena == 0) {
890                                 fprintf(output, "S%*d%s%*d%s%*s%s%*s",
891                                         csv_output ? 0 : -5,
892                                         s,
893                                         csv_sep,
894                                         csv_output ? 0 : 4,
895                                         nr,
896                                         csv_sep,
897                                         csv_output ? 0 : 18,
898                                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
899                                         csv_sep,
900                                         csv_output ? 0 : -24,
901                                         perf_evsel__name(counter));
902                                 if (counter->cgrp)
903                                         fprintf(output, "%s%s",
904                                                 csv_sep, counter->cgrp->name);
905
906                                 fputc('\n', output);
907                                 continue;
908                         }
909
910                         if (nsec_counter(counter))
911                                 nsec_printout(sock, nr, counter, val);
912                         else
913                                 abs_printout(sock, nr, counter, val);
914
915                         if (!csv_output) {
916                                 print_noise(counter, 1.0);
917
918                                 if (run != ena)
919                                         fprintf(output, "  (%.2f%%)",
920                                                 100.0 * run / ena);
921                         }
922                         fputc('\n', output);
923                 }
924         }
925 }
926
927 /*
928  * Print out the results of a single counter:
929  * aggregated counts in system-wide mode
930  */
931 static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
932 {
933         struct perf_stat *ps = counter->priv;
934         double avg = avg_stats(&ps->res_stats[0]);
935         int scaled = counter->counts->scaled;
936
937         if (prefix)
938                 fprintf(output, "%s", prefix);
939
940         if (scaled == -1) {
941                 fprintf(output, "%*s%s%*s",
942                         csv_output ? 0 : 18,
943                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
944                         csv_sep,
945                         csv_output ? 0 : -24,
946                         perf_evsel__name(counter));
947
948                 if (counter->cgrp)
949                         fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
950
951                 fputc('\n', output);
952                 return;
953         }
954
955         if (nsec_counter(counter))
956                 nsec_printout(-1, 0, counter, avg);
957         else
958                 abs_printout(-1, 0, counter, avg);
959
960         print_noise(counter, avg);
961
962         if (csv_output) {
963                 fputc('\n', output);
964                 return;
965         }
966
967         if (scaled) {
968                 double avg_enabled, avg_running;
969
970                 avg_enabled = avg_stats(&ps->res_stats[1]);
971                 avg_running = avg_stats(&ps->res_stats[2]);
972
973                 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
974         }
975         fprintf(output, "\n");
976 }
977
978 /*
979  * Print out the results of a single counter:
980  * does not use aggregated count in system-wide
981  */
982 static void print_counter(struct perf_evsel *counter, char *prefix)
983 {
984         u64 ena, run, val;
985         int cpu;
986
987         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
988                 val = counter->counts->cpu[cpu].val;
989                 ena = counter->counts->cpu[cpu].ena;
990                 run = counter->counts->cpu[cpu].run;
991
992                 if (prefix)
993                         fprintf(output, "%s", prefix);
994
995                 if (run == 0 || ena == 0) {
996                         fprintf(output, "CPU%*d%s%*s%s%*s",
997                                 csv_output ? 0 : -4,
998                                 perf_evsel__cpus(counter)->map[cpu], csv_sep,
999                                 csv_output ? 0 : 18,
1000                                 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1001                                 csv_sep,
1002                                 csv_output ? 0 : -24,
1003                                 perf_evsel__name(counter));
1004
1005                         if (counter->cgrp)
1006                                 fprintf(output, "%s%s",
1007                                         csv_sep, counter->cgrp->name);
1008
1009                         fputc('\n', output);
1010                         continue;
1011                 }
1012
1013                 if (nsec_counter(counter))
1014                         nsec_printout(cpu, 0, counter, val);
1015                 else
1016                         abs_printout(cpu, 0, counter, val);
1017
1018                 if (!csv_output) {
1019                         print_noise(counter, 1.0);
1020
1021                         if (run != ena)
1022                                 fprintf(output, "  (%.2f%%)",
1023                                         100.0 * run / ena);
1024                 }
1025                 fputc('\n', output);
1026         }
1027 }
1028
1029 static void print_stat(int argc, const char **argv)
1030 {
1031         struct perf_evsel *counter;
1032         int i;
1033
1034         fflush(stdout);
1035
1036         if (!csv_output) {
1037                 fprintf(output, "\n");
1038                 fprintf(output, " Performance counter stats for ");
1039                 if (!perf_target__has_task(&target)) {
1040                         fprintf(output, "\'%s", argv[0]);
1041                         for (i = 1; i < argc; i++)
1042                                 fprintf(output, " %s", argv[i]);
1043                 } else if (target.pid)
1044                         fprintf(output, "process id \'%s", target.pid);
1045                 else
1046                         fprintf(output, "thread id \'%s", target.tid);
1047
1048                 fprintf(output, "\'");
1049                 if (run_count > 1)
1050                         fprintf(output, " (%d runs)", run_count);
1051                 fprintf(output, ":\n\n");
1052         }
1053
1054         if (aggr_socket)
1055                 print_aggr_socket(NULL);
1056         else if (no_aggr) {
1057                 list_for_each_entry(counter, &evsel_list->entries, node)
1058                         print_counter(counter, NULL);
1059         } else {
1060                 list_for_each_entry(counter, &evsel_list->entries, node)
1061                         print_counter_aggr(counter, NULL);
1062         }
1063
1064         if (!csv_output) {
1065                 if (!null_run)
1066                         fprintf(output, "\n");
1067                 fprintf(output, " %17.9f seconds time elapsed",
1068                                 avg_stats(&walltime_nsecs_stats)/1e9);
1069                 if (run_count > 1) {
1070                         fprintf(output, "                                        ");
1071                         print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1072                                         avg_stats(&walltime_nsecs_stats));
1073                 }
1074                 fprintf(output, "\n\n");
1075         }
1076 }
1077
1078 static volatile int signr = -1;
1079
1080 static void skip_signal(int signo)
1081 {
1082         if ((child_pid == -1) || interval)
1083                 done = 1;
1084
1085         signr = signo;
1086 }
1087
1088 static void sig_atexit(void)
1089 {
1090         if (child_pid != -1)
1091                 kill(child_pid, SIGTERM);
1092
1093         if (signr == -1)
1094                 return;
1095
1096         signal(signr, SIG_DFL);
1097         kill(getpid(), signr);
1098 }
1099
1100 static int stat__set_big_num(const struct option *opt __maybe_unused,
1101                              const char *s __maybe_unused, int unset)
1102 {
1103         big_num_opt = unset ? 0 : 1;
1104         return 0;
1105 }
1106
1107 /*
1108  * Add default attributes, if there were no attributes specified or
1109  * if -d/--detailed, -d -d or -d -d -d is used:
1110  */
1111 static int add_default_attributes(void)
1112 {
1113         struct perf_event_attr default_attrs[] = {
1114
1115   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
1116   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
1117   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
1118   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
1119
1120   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
1121   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1122   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
1123   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
1124   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
1125   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
1126
1127 };
1128
1129 /*
1130  * Detailed stats (-d), covering the L1 and last level data caches:
1131  */
1132         struct perf_event_attr detailed_attrs[] = {
1133
1134   { .type = PERF_TYPE_HW_CACHE,
1135     .config =
1136          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1137         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1138         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1139
1140   { .type = PERF_TYPE_HW_CACHE,
1141     .config =
1142          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1143         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1144         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1145
1146   { .type = PERF_TYPE_HW_CACHE,
1147     .config =
1148          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1149         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1150         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1151
1152   { .type = PERF_TYPE_HW_CACHE,
1153     .config =
1154          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1155         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1156         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1157 };
1158
1159 /*
1160  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1161  */
1162         struct perf_event_attr very_detailed_attrs[] = {
1163
1164   { .type = PERF_TYPE_HW_CACHE,
1165     .config =
1166          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1167         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1168         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1169
1170   { .type = PERF_TYPE_HW_CACHE,
1171     .config =
1172          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1173         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1174         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1175
1176   { .type = PERF_TYPE_HW_CACHE,
1177     .config =
1178          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1179         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1180         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1181
1182   { .type = PERF_TYPE_HW_CACHE,
1183     .config =
1184          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1185         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1186         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1187
1188   { .type = PERF_TYPE_HW_CACHE,
1189     .config =
1190          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1191         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1192         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1193
1194   { .type = PERF_TYPE_HW_CACHE,
1195     .config =
1196          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1197         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1198         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1199
1200 };
1201
1202 /*
1203  * Very, very detailed stats (-d -d -d), adding prefetch events:
1204  */
1205         struct perf_event_attr very_very_detailed_attrs[] = {
1206
1207   { .type = PERF_TYPE_HW_CACHE,
1208     .config =
1209          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1210         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1211         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1212
1213   { .type = PERF_TYPE_HW_CACHE,
1214     .config =
1215          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1216         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1217         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1218 };
1219
1220         /* Set attrs if no event is selected and !null_run: */
1221         if (null_run)
1222                 return 0;
1223
1224         if (!evsel_list->nr_entries) {
1225                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1226                         return -1;
1227         }
1228
1229         /* Detailed events get appended to the event list: */
1230
1231         if (detailed_run <  1)
1232                 return 0;
1233
1234         /* Append detailed run extra attributes: */
1235         if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1236                 return -1;
1237
1238         if (detailed_run < 2)
1239                 return 0;
1240
1241         /* Append very detailed run extra attributes: */
1242         if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1243                 return -1;
1244
1245         if (detailed_run < 3)
1246                 return 0;
1247
1248         /* Append very, very detailed run extra attributes: */
1249         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1250 }
1251
1252 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
1253 {
1254         bool append_file = false;
1255         int output_fd = 0;
1256         const char *output_name = NULL;
1257         const struct option options[] = {
1258         OPT_CALLBACK('e', "event", &evsel_list, "event",
1259                      "event selector. use 'perf list' to list available events",
1260                      parse_events_option),
1261         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1262                      "event filter", parse_filter),
1263         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1264                     "child tasks do not inherit counters"),
1265         OPT_STRING('p', "pid", &target.pid, "pid",
1266                    "stat events on existing process id"),
1267         OPT_STRING('t', "tid", &target.tid, "tid",
1268                    "stat events on existing thread id"),
1269         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1270                     "system-wide collection from all CPUs"),
1271         OPT_BOOLEAN('g', "group", &group,
1272                     "put the counters into a counter group"),
1273         OPT_BOOLEAN('c', "scale", &scale, "scale/normalize counters"),
1274         OPT_INCR('v', "verbose", &verbose,
1275                     "be more verbose (show counter open errors, etc)"),
1276         OPT_INTEGER('r', "repeat", &run_count,
1277                     "repeat command and print average + stddev (max: 100, forever: 0)"),
1278         OPT_BOOLEAN('n', "null", &null_run,
1279                     "null run - dont start any counters"),
1280         OPT_INCR('d', "detailed", &detailed_run,
1281                     "detailed run - start a lot of events"),
1282         OPT_BOOLEAN('S', "sync", &sync_run,
1283                     "call sync() before starting a run"),
1284         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL, 
1285                            "print large numbers with thousands\' separators",
1286                            stat__set_big_num),
1287         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1288                     "list of cpus to monitor in system-wide"),
1289         OPT_BOOLEAN('A', "no-aggr", &no_aggr, "disable CPU count aggregation"),
1290         OPT_STRING('x', "field-separator", &csv_sep, "separator",
1291                    "print counts with custom separator"),
1292         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1293                      "monitor event in cgroup name only", parse_cgroups),
1294         OPT_STRING('o', "output", &output_name, "file", "output file name"),
1295         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1296         OPT_INTEGER(0, "log-fd", &output_fd,
1297                     "log output to fd, instead of stderr"),
1298         OPT_STRING(0, "pre", &pre_cmd, "command",
1299                         "command to run prior to the measured command"),
1300         OPT_STRING(0, "post", &post_cmd, "command",
1301                         "command to run after to the measured command"),
1302         OPT_UINTEGER('I', "interval-print", &interval,
1303                     "print counts at regular interval in ms (>= 100)"),
1304         OPT_BOOLEAN(0, "aggr-socket", &aggr_socket, "aggregate counts per processor socket"),
1305         OPT_END()
1306         };
1307         const char * const stat_usage[] = {
1308                 "perf stat [<options>] [<command>]",
1309                 NULL
1310         };
1311         struct perf_evsel *pos;
1312         int status = -ENOMEM, run_idx;
1313         const char *mode;
1314
1315         setlocale(LC_ALL, "");
1316
1317         evsel_list = perf_evlist__new();
1318         if (evsel_list == NULL)
1319                 return -ENOMEM;
1320
1321         argc = parse_options(argc, argv, options, stat_usage,
1322                 PARSE_OPT_STOP_AT_NON_OPTION);
1323
1324         output = stderr;
1325         if (output_name && strcmp(output_name, "-"))
1326                 output = NULL;
1327
1328         if (output_name && output_fd) {
1329                 fprintf(stderr, "cannot use both --output and --log-fd\n");
1330                 usage_with_options(stat_usage, options);
1331         }
1332
1333         if (output_fd < 0) {
1334                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1335                 usage_with_options(stat_usage, options);
1336         }
1337
1338         if (!output) {
1339                 struct timespec tm;
1340                 mode = append_file ? "a" : "w";
1341
1342                 output = fopen(output_name, mode);
1343                 if (!output) {
1344                         perror("failed to create output file");
1345                         return -1;
1346                 }
1347                 clock_gettime(CLOCK_REALTIME, &tm);
1348                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1349         } else if (output_fd > 0) {
1350                 mode = append_file ? "a" : "w";
1351                 output = fdopen(output_fd, mode);
1352                 if (!output) {
1353                         perror("Failed opening logfd");
1354                         return -errno;
1355                 }
1356         }
1357
1358         if (csv_sep) {
1359                 csv_output = true;
1360                 if (!strcmp(csv_sep, "\\t"))
1361                         csv_sep = "\t";
1362         } else
1363                 csv_sep = DEFAULT_SEPARATOR;
1364
1365         /*
1366          * let the spreadsheet do the pretty-printing
1367          */
1368         if (csv_output) {
1369                 /* User explicitly passed -B? */
1370                 if (big_num_opt == 1) {
1371                         fprintf(stderr, "-B option not supported with -x\n");
1372                         usage_with_options(stat_usage, options);
1373                 } else /* Nope, so disable big number formatting */
1374                         big_num = false;
1375         } else if (big_num_opt == 0) /* User passed --no-big-num */
1376                 big_num = false;
1377
1378         if (!argc && !perf_target__has_task(&target))
1379                 usage_with_options(stat_usage, options);
1380         if (run_count < 0) {
1381                 usage_with_options(stat_usage, options);
1382         } else if (run_count == 0) {
1383                 forever = true;
1384                 run_count = 1;
1385         }
1386
1387         /* no_aggr, cgroup are for system-wide only */
1388         if ((no_aggr || nr_cgroups) && !perf_target__has_cpu(&target)) {
1389                 fprintf(stderr, "both cgroup and no-aggregation "
1390                         "modes only available in system-wide mode\n");
1391
1392                 usage_with_options(stat_usage, options);
1393         }
1394
1395         if (aggr_socket) {
1396                 if (!perf_target__has_cpu(&target)) {
1397                         fprintf(stderr, "--aggr-socket only available in system-wide mode (-a)\n");
1398                         usage_with_options(stat_usage, options);
1399                 }
1400                 no_aggr = true;
1401         }
1402
1403         if (add_default_attributes())
1404                 goto out;
1405
1406         perf_target__validate(&target);
1407
1408         if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1409                 if (perf_target__has_task(&target))
1410                         pr_err("Problems finding threads of monitor\n");
1411                 if (perf_target__has_cpu(&target))
1412                         perror("failed to parse CPUs map");
1413
1414                 usage_with_options(stat_usage, options);
1415                 return -1;
1416         }
1417         if (interval && interval < 100) {
1418                 pr_err("print interval must be >= 100ms\n");
1419                 usage_with_options(stat_usage, options);
1420                 return -1;
1421         }
1422
1423         list_for_each_entry(pos, &evsel_list->entries, node) {
1424                 if (perf_evsel__alloc_stat_priv(pos) < 0 ||
1425                     perf_evsel__alloc_counts(pos, perf_evsel__nr_cpus(pos)) < 0)
1426                         goto out_free_fd;
1427         }
1428         if (interval) {
1429                 list_for_each_entry(pos, &evsel_list->entries, node) {
1430                         if (perf_evsel__alloc_prev_raw_counts(pos) < 0)
1431                                 goto out_free_fd;
1432                 }
1433         }
1434
1435         /*
1436          * We dont want to block the signals - that would cause
1437          * child tasks to inherit that and Ctrl-C would not work.
1438          * What we want is for Ctrl-C to work in the exec()-ed
1439          * task, but being ignored by perf stat itself:
1440          */
1441         atexit(sig_atexit);
1442         if (!forever)
1443                 signal(SIGINT,  skip_signal);
1444         signal(SIGCHLD, skip_signal);
1445         signal(SIGALRM, skip_signal);
1446         signal(SIGABRT, skip_signal);
1447
1448         status = 0;
1449         for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
1450                 if (run_count != 1 && verbose)
1451                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1452                                 run_idx + 1);
1453
1454                 status = run_perf_stat(argc, argv);
1455                 if (forever && status != -1) {
1456                         print_stat(argc, argv);
1457                         list_for_each_entry(pos, &evsel_list->entries, node) {
1458                                 perf_evsel__reset_stat_priv(pos);
1459                                 perf_evsel__reset_counts(pos, perf_evsel__nr_cpus(pos));
1460                         }
1461                         reset_stats();
1462                 }
1463         }
1464
1465         if (!forever && status != -1 && !interval)
1466                 print_stat(argc, argv);
1467 out_free_fd:
1468         list_for_each_entry(pos, &evsel_list->entries, node) {
1469                 perf_evsel__free_stat_priv(pos);
1470                 perf_evsel__free_counts(pos);
1471                 perf_evsel__free_prev_raw_counts(pos);
1472         }
1473         perf_evlist__delete_maps(evsel_list);
1474 out:
1475         perf_evlist__delete(evsel_list);
1476         return status;
1477 }