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Merge tag 'staging-3.11-rc2' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh...
[linux-2.6.git] / tools / perf / builtin-stat.c
blob352fbd7ff4a1a16eda225109a9fb7e92460f6ed6
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(char *prefix);
72
73 static struct perf_evlist *evsel_list;
74
75 static struct perf_target target = {
76 .uid = UINT_MAX,
77 };
78
79 enum aggr_mode {
80 AGGR_NONE,
81 AGGR_GLOBAL,
82 AGGR_SOCKET,
83 AGGR_CORE,
84 };
85
86 static int run_count = 1;
87 static bool no_inherit = false;
88 static bool scale = true;
89 static enum aggr_mode aggr_mode = AGGR_GLOBAL;
90 static volatile pid_t child_pid = -1;
91 static bool null_run = false;
92 static int detailed_run = 0;
93 static bool big_num = true;
94 static int big_num_opt = -1;
95 static const char *csv_sep = NULL;
96 static bool csv_output = false;
97 static bool group = false;
98 static FILE *output = NULL;
99 static const char *pre_cmd = NULL;
100 static const char *post_cmd = NULL;
101 static bool sync_run = false;
102 static unsigned int interval = 0;
103 static bool forever = false;
104 static struct timespec ref_time;
105 static struct cpu_map *aggr_map;
106 static int (*aggr_get_id)(struct cpu_map *m, int cpu);
107
108 static volatile int done = 0;
109
110 struct perf_stat {
111 struct stats res_stats[3];
112 };
113
114 static inline void diff_timespec(struct timespec *r, struct timespec *a,
115 struct timespec *b)
116 {
117 r->tv_sec = a->tv_sec - b->tv_sec;
118 if (a->tv_nsec < b->tv_nsec) {
119 r->tv_nsec = a->tv_nsec + 1000000000L - b->tv_nsec;
120 r->tv_sec--;
121 } else {
122 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
123 }
124 }
125
126 static inline struct cpu_map *perf_evsel__cpus(struct perf_evsel *evsel)
127 {
128 return (evsel->cpus && !target.cpu_list) ? evsel->cpus : evsel_list->cpus;
129 }
130
131 static inline int perf_evsel__nr_cpus(struct perf_evsel *evsel)
132 {
133 return perf_evsel__cpus(evsel)->nr;
134 }
135
136 static void perf_evsel__reset_stat_priv(struct perf_evsel *evsel)
137 {
138 memset(evsel->priv, 0, sizeof(struct perf_stat));
139 }
140
141 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
142 {
143 evsel->priv = zalloc(sizeof(struct perf_stat));
144 return evsel->priv == NULL ? -ENOMEM : 0;
145 }
146
147 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
148 {
149 free(evsel->priv);
150 evsel->priv = NULL;
151 }
152
153 static int perf_evsel__alloc_prev_raw_counts(struct perf_evsel *evsel)
154 {
155 void *addr;
156 size_t sz;
157
158 sz = sizeof(*evsel->counts) +
159 (perf_evsel__nr_cpus(evsel) * sizeof(struct perf_counts_values));
160
161 addr = zalloc(sz);
162 if (!addr)
163 return -ENOMEM;
164
165 evsel->prev_raw_counts = addr;
166
167 return 0;
168 }
169
170 static void perf_evsel__free_prev_raw_counts(struct perf_evsel *evsel)
171 {
172 free(evsel->prev_raw_counts);
173 evsel->prev_raw_counts = NULL;
174 }
175
176 static void perf_evlist__free_stats(struct perf_evlist *evlist)
177 {
178 struct perf_evsel *evsel;
179
180 list_for_each_entry(evsel, &evlist->entries, node) {
181 perf_evsel__free_stat_priv(evsel);
182 perf_evsel__free_counts(evsel);
183 perf_evsel__free_prev_raw_counts(evsel);
184 }
185 }
186
187 static int perf_evlist__alloc_stats(struct perf_evlist *evlist, bool alloc_raw)
188 {
189 struct perf_evsel *evsel;
190
191 list_for_each_entry(evsel, &evlist->entries, node) {
192 if (perf_evsel__alloc_stat_priv(evsel) < 0 ||
193 perf_evsel__alloc_counts(evsel, perf_evsel__nr_cpus(evsel)) < 0 ||
194 (alloc_raw && perf_evsel__alloc_prev_raw_counts(evsel) < 0))
195 goto out_free;
196 }
197
198 return 0;
199
200 out_free:
201 perf_evlist__free_stats(evlist);
202 return -1;
203 }
204
205 static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
206 static struct stats runtime_cycles_stats[MAX_NR_CPUS];
207 static struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
208 static struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
209 static struct stats runtime_branches_stats[MAX_NR_CPUS];
210 static struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
211 static struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
212 static struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
213 static struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
214 static struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
215 static struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
216 static struct stats walltime_nsecs_stats;
217
218 static void perf_stat__reset_stats(struct perf_evlist *evlist)
219 {
220 struct perf_evsel *evsel;
221
222 list_for_each_entry(evsel, &evlist->entries, node) {
223 perf_evsel__reset_stat_priv(evsel);
224 perf_evsel__reset_counts(evsel, perf_evsel__nr_cpus(evsel));
225 }
226
227 memset(runtime_nsecs_stats, 0, sizeof(runtime_nsecs_stats));
228 memset(runtime_cycles_stats, 0, sizeof(runtime_cycles_stats));
229 memset(runtime_stalled_cycles_front_stats, 0, sizeof(runtime_stalled_cycles_front_stats));
230 memset(runtime_stalled_cycles_back_stats, 0, sizeof(runtime_stalled_cycles_back_stats));
231 memset(runtime_branches_stats, 0, sizeof(runtime_branches_stats));
232 memset(runtime_cacherefs_stats, 0, sizeof(runtime_cacherefs_stats));
233 memset(runtime_l1_dcache_stats, 0, sizeof(runtime_l1_dcache_stats));
234 memset(runtime_l1_icache_stats, 0, sizeof(runtime_l1_icache_stats));
235 memset(runtime_ll_cache_stats, 0, sizeof(runtime_ll_cache_stats));
236 memset(runtime_itlb_cache_stats, 0, sizeof(runtime_itlb_cache_stats));
237 memset(runtime_dtlb_cache_stats, 0, sizeof(runtime_dtlb_cache_stats));
238 memset(&walltime_nsecs_stats, 0, sizeof(walltime_nsecs_stats));
239 }
240
241 static int create_perf_stat_counter(struct perf_evsel *evsel)
242 {
243 struct perf_event_attr *attr = &evsel->attr;
244
245 if (scale)
246 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
247 PERF_FORMAT_TOTAL_TIME_RUNNING;
248
249 attr->inherit = !no_inherit;
250
251 if (perf_target__has_cpu(&target))
252 return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
253
254 if (!perf_target__has_task(&target) &&
255 perf_evsel__is_group_leader(evsel)) {
256 attr->disabled = 1;
257 attr->enable_on_exec = 1;
258 }
259
260 return perf_evsel__open_per_thread(evsel, evsel_list->threads);
261 }
262
263 /*
264 * Does the counter have nsecs as a unit?
265 */
266 static inline int nsec_counter(struct perf_evsel *evsel)
267 {
268 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
269 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
270 return 1;
271
272 return 0;
273 }
274
275 /*
276 * Update various tracking values we maintain to print
277 * more semantic information such as miss/hit ratios,
278 * instruction rates, etc:
279 */
280 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
281 {
282 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
283 update_stats(&runtime_nsecs_stats[0], count[0]);
284 else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
285 update_stats(&runtime_cycles_stats[0], count[0]);
286 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
287 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
288 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
289 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
290 else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
291 update_stats(&runtime_branches_stats[0], count[0]);
292 else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
293 update_stats(&runtime_cacherefs_stats[0], count[0]);
294 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
295 update_stats(&runtime_l1_dcache_stats[0], count[0]);
296 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
297 update_stats(&runtime_l1_icache_stats[0], count[0]);
298 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
299 update_stats(&runtime_ll_cache_stats[0], count[0]);
300 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
301 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
302 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
303 update_stats(&runtime_itlb_cache_stats[0], count[0]);
304 }
305
306 /*
307 * Read out the results of a single counter:
308 * aggregate counts across CPUs in system-wide mode
309 */
310 static int read_counter_aggr(struct perf_evsel *counter)
311 {
312 struct perf_stat *ps = counter->priv;
313 u64 *count = counter->counts->aggr.values;
314 int i;
315
316 if (__perf_evsel__read(counter, perf_evsel__nr_cpus(counter),
317 thread_map__nr(evsel_list->threads), scale) < 0)
318 return -1;
319
320 for (i = 0; i < 3; i++)
321 update_stats(&ps->res_stats[i], count[i]);
322
323 if (verbose) {
324 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
325 perf_evsel__name(counter), count[0], count[1], count[2]);
326 }
327
328 /*
329 * Save the full runtime - to allow normalization during printout:
330 */
331 update_shadow_stats(counter, count);
332
333 return 0;
334 }
335
336 /*
337 * Read out the results of a single counter:
338 * do not aggregate counts across CPUs in system-wide mode
339 */
340 static int read_counter(struct perf_evsel *counter)
341 {
342 u64 *count;
343 int cpu;
344
345 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
346 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
347 return -1;
348
349 count = counter->counts->cpu[cpu].values;
350
351 update_shadow_stats(counter, count);
352 }
353
354 return 0;
355 }
356
357 static void print_interval(void)
358 {
359 static int num_print_interval;
360 struct perf_evsel *counter;
361 struct perf_stat *ps;
362 struct timespec ts, rs;
363 char prefix[64];
364
365 if (aggr_mode == AGGR_GLOBAL) {
366 list_for_each_entry(counter, &evsel_list->entries, node) {
367 ps = counter->priv;
368 memset(ps->res_stats, 0, sizeof(ps->res_stats));
369 read_counter_aggr(counter);
370 }
371 } else {
372 list_for_each_entry(counter, &evsel_list->entries, node) {
373 ps = counter->priv;
374 memset(ps->res_stats, 0, sizeof(ps->res_stats));
375 read_counter(counter);
376 }
377 }
378
379 clock_gettime(CLOCK_MONOTONIC, &ts);
380 diff_timespec(&rs, &ts, &ref_time);
381 sprintf(prefix, "%6lu.%09lu%s", rs.tv_sec, rs.tv_nsec, csv_sep);
382
383 if (num_print_interval == 0 && !csv_output) {
384 switch (aggr_mode) {
385 case AGGR_SOCKET:
386 fprintf(output, "# time socket cpus counts events\n");
387 break;
388 case AGGR_CORE:
389 fprintf(output, "# time core cpus counts events\n");
390 break;
391 case AGGR_NONE:
392 fprintf(output, "# time CPU counts events\n");
393 break;
394 case AGGR_GLOBAL:
395 default:
396 fprintf(output, "# time counts events\n");
397 }
398 }
399
400 if (++num_print_interval == 25)
401 num_print_interval = 0;
402
403 switch (aggr_mode) {
404 case AGGR_CORE:
405 case AGGR_SOCKET:
406 print_aggr(prefix);
407 break;
408 case AGGR_NONE:
409 list_for_each_entry(counter, &evsel_list->entries, node)
410 print_counter(counter, prefix);
411 break;
412 case AGGR_GLOBAL:
413 default:
414 list_for_each_entry(counter, &evsel_list->entries, node)
415 print_counter_aggr(counter, prefix);
416 }
417 }
418
419 static int __run_perf_stat(int argc, const char **argv)
420 {
421 char msg[512];
422 unsigned long long t0, t1;
423 struct perf_evsel *counter;
424 struct timespec ts;
425 int status = 0;
426 const bool forks = (argc > 0);
427
428 if (interval) {
429 ts.tv_sec = interval / 1000;
430 ts.tv_nsec = (interval % 1000) * 1000000;
431 } else {
432 ts.tv_sec = 1;
433 ts.tv_nsec = 0;
434 }
435
436 if (forks) {
437 if (perf_evlist__prepare_workload(evsel_list, &target, argv,
438 false, false) < 0) {
439 perror("failed to prepare workload");
440 return -1;
441 }
442 }
443
444 if (group)
445 perf_evlist__set_leader(evsel_list);
446
447 list_for_each_entry(counter, &evsel_list->entries, node) {
448 if (create_perf_stat_counter(counter) < 0) {
449 /*
450 * PPC returns ENXIO for HW counters until 2.6.37
451 * (behavior changed with commit b0a873e).
452 */
453 if (errno == EINVAL || errno == ENOSYS ||
454 errno == ENOENT || errno == EOPNOTSUPP ||
455 errno == ENXIO) {
456 if (verbose)
457 ui__warning("%s event is not supported by the kernel.\n",
458 perf_evsel__name(counter));
459 counter->supported = false;
460 continue;
461 }
462
463 perf_evsel__open_strerror(counter, &target,
464 errno, msg, sizeof(msg));
465 ui__error("%s\n", msg);
466
467 if (child_pid != -1)
468 kill(child_pid, SIGTERM);
469
470 return -1;
471 }
472 counter->supported = true;
473 }
474
475 if (perf_evlist__apply_filters(evsel_list)) {
476 error("failed to set filter with %d (%s)\n", errno,
477 strerror(errno));
478 return -1;
479 }
480
481 /*
482 * Enable counters and exec the command:
483 */
484 t0 = rdclock();
485 clock_gettime(CLOCK_MONOTONIC, &ref_time);
486
487 if (forks) {
488 perf_evlist__start_workload(evsel_list);
489
490 if (interval) {
491 while (!waitpid(child_pid, &status, WNOHANG)) {
492 nanosleep(&ts, NULL);
493 print_interval();
494 }
495 }
496 wait(&status);
497 if (WIFSIGNALED(status))
498 psignal(WTERMSIG(status), argv[0]);
499 } else {
500 while (!done) {
501 nanosleep(&ts, NULL);
502 if (interval)
503 print_interval();
504 }
505 }
506
507 t1 = rdclock();
508
509 update_stats(&walltime_nsecs_stats, t1 - t0);
510
511 if (aggr_mode == AGGR_GLOBAL) {
512 list_for_each_entry(counter, &evsel_list->entries, node) {
513 read_counter_aggr(counter);
514 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
515 thread_map__nr(evsel_list->threads));
516 }
517 } else {
518 list_for_each_entry(counter, &evsel_list->entries, node) {
519 read_counter(counter);
520 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
521 }
522 }
523
524 return WEXITSTATUS(status);
525 }
526
527 static int run_perf_stat(int argc __maybe_unused, const char **argv)
528 {
529 int ret;
530
531 if (pre_cmd) {
532 ret = system(pre_cmd);
533 if (ret)
534 return ret;
535 }
536
537 if (sync_run)
538 sync();
539
540 ret = __run_perf_stat(argc, argv);
541 if (ret)
542 return ret;
543
544 if (post_cmd) {
545 ret = system(post_cmd);
546 if (ret)
547 return ret;
548 }
549
550 return ret;
551 }
552
553 static void print_noise_pct(double total, double avg)
554 {
555 double pct = rel_stddev_stats(total, avg);
556
557 if (csv_output)
558 fprintf(output, "%s%.2f%%", csv_sep, pct);
559 else if (pct)
560 fprintf(output, " ( +-%6.2f%% )", pct);
561 }
562
563 static void print_noise(struct perf_evsel *evsel, double avg)
564 {
565 struct perf_stat *ps;
566
567 if (run_count == 1)
568 return;
569
570 ps = evsel->priv;
571 print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
572 }
573
574 static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
575 {
576 switch (aggr_mode) {
577 case AGGR_CORE:
578 fprintf(output, "S%d-C%*d%s%*d%s",
579 cpu_map__id_to_socket(id),
580 csv_output ? 0 : -8,
581 cpu_map__id_to_cpu(id),
582 csv_sep,
583 csv_output ? 0 : 4,
584 nr,
585 csv_sep);
586 break;
587 case AGGR_SOCKET:
588 fprintf(output, "S%*d%s%*d%s",
589 csv_output ? 0 : -5,
590 id,
591 csv_sep,
592 csv_output ? 0 : 4,
593 nr,
594 csv_sep);
595 break;
596 case AGGR_NONE:
597 fprintf(output, "CPU%*d%s",
598 csv_output ? 0 : -4,
599 perf_evsel__cpus(evsel)->map[id], csv_sep);
600 break;
601 case AGGR_GLOBAL:
602 default:
603 break;
604 }
605 }
606
607 static void nsec_printout(int cpu, int nr, struct perf_evsel *evsel, double avg)
608 {
609 double msecs = avg / 1e6;
610 const char *fmt = csv_output ? "%.6f%s%s" : "%18.6f%s%-25s";
611
612 aggr_printout(evsel, cpu, nr);
613
614 fprintf(output, fmt, msecs, csv_sep, perf_evsel__name(evsel));
615
616 if (evsel->cgrp)
617 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
618
619 if (csv_output || interval)
620 return;
621
622 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
623 fprintf(output, " # %8.3f CPUs utilized ",
624 avg / avg_stats(&walltime_nsecs_stats));
625 else
626 fprintf(output, " ");
627 }
628
629 /* used for get_ratio_color() */
630 enum grc_type {
631 GRC_STALLED_CYCLES_FE,
632 GRC_STALLED_CYCLES_BE,
633 GRC_CACHE_MISSES,
634 GRC_MAX_NR
635 };
636
637 static const char *get_ratio_color(enum grc_type type, double ratio)
638 {
639 static const double grc_table[GRC_MAX_NR][3] = {
640 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
641 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
642 [GRC_CACHE_MISSES] = { 20.0, 10.0, 5.0 },
643 };
644 const char *color = PERF_COLOR_NORMAL;
645
646 if (ratio > grc_table[type][0])
647 color = PERF_COLOR_RED;
648 else if (ratio > grc_table[type][1])
649 color = PERF_COLOR_MAGENTA;
650 else if (ratio > grc_table[type][2])
651 color = PERF_COLOR_YELLOW;
652
653 return color;
654 }
655
656 static void print_stalled_cycles_frontend(int cpu,
657 struct perf_evsel *evsel
658 __maybe_unused, double avg)
659 {
660 double total, ratio = 0.0;
661 const char *color;
662
663 total = avg_stats(&runtime_cycles_stats[cpu]);
664
665 if (total)
666 ratio = avg / total * 100.0;
667
668 color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
669
670 fprintf(output, " # ");
671 color_fprintf(output, color, "%6.2f%%", ratio);
672 fprintf(output, " frontend cycles idle ");
673 }
674
675 static void print_stalled_cycles_backend(int cpu,
676 struct perf_evsel *evsel
677 __maybe_unused, double avg)
678 {
679 double total, ratio = 0.0;
680 const char *color;
681
682 total = avg_stats(&runtime_cycles_stats[cpu]);
683
684 if (total)
685 ratio = avg / total * 100.0;
686
687 color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
688
689 fprintf(output, " # ");
690 color_fprintf(output, color, "%6.2f%%", ratio);
691 fprintf(output, " backend cycles idle ");
692 }
693
694 static void print_branch_misses(int cpu,
695 struct perf_evsel *evsel __maybe_unused,
696 double avg)
697 {
698 double total, ratio = 0.0;
699 const char *color;
700
701 total = avg_stats(&runtime_branches_stats[cpu]);
702
703 if (total)
704 ratio = avg / total * 100.0;
705
706 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
707
708 fprintf(output, " # ");
709 color_fprintf(output, color, "%6.2f%%", ratio);
710 fprintf(output, " of all branches ");
711 }
712
713 static void print_l1_dcache_misses(int cpu,
714 struct perf_evsel *evsel __maybe_unused,
715 double avg)
716 {
717 double total, ratio = 0.0;
718 const char *color;
719
720 total = avg_stats(&runtime_l1_dcache_stats[cpu]);
721
722 if (total)
723 ratio = avg / total * 100.0;
724
725 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
726
727 fprintf(output, " # ");
728 color_fprintf(output, color, "%6.2f%%", ratio);
729 fprintf(output, " of all L1-dcache hits ");
730 }
731
732 static void print_l1_icache_misses(int cpu,
733 struct perf_evsel *evsel __maybe_unused,
734 double avg)
735 {
736 double total, ratio = 0.0;
737 const char *color;
738
739 total = avg_stats(&runtime_l1_icache_stats[cpu]);
740
741 if (total)
742 ratio = avg / total * 100.0;
743
744 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
745
746 fprintf(output, " # ");
747 color_fprintf(output, color, "%6.2f%%", ratio);
748 fprintf(output, " of all L1-icache hits ");
749 }
750
751 static void print_dtlb_cache_misses(int cpu,
752 struct perf_evsel *evsel __maybe_unused,
753 double avg)
754 {
755 double total, ratio = 0.0;
756 const char *color;
757
758 total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
759
760 if (total)
761 ratio = avg / total * 100.0;
762
763 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
764
765 fprintf(output, " # ");
766 color_fprintf(output, color, "%6.2f%%", ratio);
767 fprintf(output, " of all dTLB cache hits ");
768 }
769
770 static void print_itlb_cache_misses(int cpu,
771 struct perf_evsel *evsel __maybe_unused,
772 double avg)
773 {
774 double total, ratio = 0.0;
775 const char *color;
776
777 total = avg_stats(&runtime_itlb_cache_stats[cpu]);
778
779 if (total)
780 ratio = avg / total * 100.0;
781
782 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
783
784 fprintf(output, " # ");
785 color_fprintf(output, color, "%6.2f%%", ratio);
786 fprintf(output, " of all iTLB cache hits ");
787 }
788
789 static void print_ll_cache_misses(int cpu,
790 struct perf_evsel *evsel __maybe_unused,
791 double avg)
792 {
793 double total, ratio = 0.0;
794 const char *color;
795
796 total = avg_stats(&runtime_ll_cache_stats[cpu]);
797
798 if (total)
799 ratio = avg / total * 100.0;
800
801 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
802
803 fprintf(output, " # ");
804 color_fprintf(output, color, "%6.2f%%", ratio);
805 fprintf(output, " of all LL-cache hits ");
806 }
807
808 static void abs_printout(int cpu, int nr, struct perf_evsel *evsel, double avg)
809 {
810 double total, ratio = 0.0;
811 const char *fmt;
812
813 if (csv_output)
814 fmt = "%.0f%s%s";
815 else if (big_num)
816 fmt = "%'18.0f%s%-25s";
817 else
818 fmt = "%18.0f%s%-25s";
819
820 aggr_printout(evsel, cpu, nr);
821
822 if (aggr_mode == AGGR_GLOBAL)
823 cpu = 0;
824
825 fprintf(output, fmt, avg, csv_sep, perf_evsel__name(evsel));
826
827 if (evsel->cgrp)
828 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
829
830 if (csv_output || interval)
831 return;
832
833 if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
834 total = avg_stats(&runtime_cycles_stats[cpu]);
835 if (total)
836 ratio = avg / total;
837
838 fprintf(output, " # %5.2f insns per cycle ", ratio);
839
840 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
841 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
842
843 if (total && avg) {
844 ratio = total / avg;
845 fprintf(output, "\n # %5.2f stalled cycles per insn", ratio);
846 }
847
848 } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
849 runtime_branches_stats[cpu].n != 0) {
850 print_branch_misses(cpu, evsel, avg);
851 } else if (
852 evsel->attr.type == PERF_TYPE_HW_CACHE &&
853 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1D |
854 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
855 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
856 runtime_l1_dcache_stats[cpu].n != 0) {
857 print_l1_dcache_misses(cpu, evsel, avg);
858 } else if (
859 evsel->attr.type == PERF_TYPE_HW_CACHE &&
860 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1I |
861 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
862 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
863 runtime_l1_icache_stats[cpu].n != 0) {
864 print_l1_icache_misses(cpu, evsel, avg);
865 } else if (
866 evsel->attr.type == PERF_TYPE_HW_CACHE &&
867 evsel->attr.config == ( PERF_COUNT_HW_CACHE_DTLB |
868 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
869 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
870 runtime_dtlb_cache_stats[cpu].n != 0) {
871 print_dtlb_cache_misses(cpu, evsel, avg);
872 } else if (
873 evsel->attr.type == PERF_TYPE_HW_CACHE &&
874 evsel->attr.config == ( PERF_COUNT_HW_CACHE_ITLB |
875 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
876 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
877 runtime_itlb_cache_stats[cpu].n != 0) {
878 print_itlb_cache_misses(cpu, evsel, avg);
879 } else if (
880 evsel->attr.type == PERF_TYPE_HW_CACHE &&
881 evsel->attr.config == ( PERF_COUNT_HW_CACHE_LL |
882 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
883 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
884 runtime_ll_cache_stats[cpu].n != 0) {
885 print_ll_cache_misses(cpu, evsel, avg);
886 } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
887 runtime_cacherefs_stats[cpu].n != 0) {
888 total = avg_stats(&runtime_cacherefs_stats[cpu]);
889
890 if (total)
891 ratio = avg * 100 / total;
892
893 fprintf(output, " # %8.3f %% of all cache refs ", ratio);
894
895 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
896 print_stalled_cycles_frontend(cpu, evsel, avg);
897 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
898 print_stalled_cycles_backend(cpu, evsel, avg);
899 } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
900 total = avg_stats(&runtime_nsecs_stats[cpu]);
901
902 if (total)
903 ratio = 1.0 * avg / total;
904
905 fprintf(output, " # %8.3f GHz ", ratio);
906 } else if (runtime_nsecs_stats[cpu].n != 0) {
907 char unit = 'M';
908
909 total = avg_stats(&runtime_nsecs_stats[cpu]);
910
911 if (total)
912 ratio = 1000.0 * avg / total;
913 if (ratio < 0.001) {
914 ratio *= 1000;
915 unit = 'K';
916 }
917
918 fprintf(output, " # %8.3f %c/sec ", ratio, unit);
919 } else {
920 fprintf(output, " ");
921 }
922 }
923
924 static void print_aggr(char *prefix)
925 {
926 struct perf_evsel *counter;
927 int cpu, cpu2, s, s2, id, nr;
928 u64 ena, run, val;
929
930 if (!(aggr_map || aggr_get_id))
931 return;
932
933 for (s = 0; s < aggr_map->nr; s++) {
934 id = aggr_map->map[s];
935 list_for_each_entry(counter, &evsel_list->entries, node) {
936 val = ena = run = 0;
937 nr = 0;
938 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
939 cpu2 = perf_evsel__cpus(counter)->map[cpu];
940 s2 = aggr_get_id(evsel_list->cpus, cpu2);
941 if (s2 != id)
942 continue;
943 val += counter->counts->cpu[cpu].val;
944 ena += counter->counts->cpu[cpu].ena;
945 run += counter->counts->cpu[cpu].run;
946 nr++;
947 }
948 if (prefix)
949 fprintf(output, "%s", prefix);
950
951 if (run == 0 || ena == 0) {
952 aggr_printout(counter, id, nr);
953
954 fprintf(output, "%*s%s%*s",
955 csv_output ? 0 : 18,
956 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
957 csv_sep,
958 csv_output ? 0 : -24,
959 perf_evsel__name(counter));
960
961 if (counter->cgrp)
962 fprintf(output, "%s%s",
963 csv_sep, counter->cgrp->name);
964
965 fputc('\n', output);
966 continue;
967 }
968
969 if (nsec_counter(counter))
970 nsec_printout(id, nr, counter, val);
971 else
972 abs_printout(id, nr, counter, val);
973
974 if (!csv_output) {
975 print_noise(counter, 1.0);
976
977 if (run != ena)
978 fprintf(output, " (%.2f%%)",
979 100.0 * run / ena);
980 }
981 fputc('\n', output);
982 }
983 }
984 }
985
986 /*
987 * Print out the results of a single counter:
988 * aggregated counts in system-wide mode
989 */
990 static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
991 {
992 struct perf_stat *ps = counter->priv;
993 double avg = avg_stats(&ps->res_stats[0]);
994 int scaled = counter->counts->scaled;
995
996 if (prefix)
997 fprintf(output, "%s", prefix);
998
999 if (scaled == -1) {
1000 fprintf(output, "%*s%s%*s",
1001 csv_output ? 0 : 18,
1002 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1003 csv_sep,
1004 csv_output ? 0 : -24,
1005 perf_evsel__name(counter));
1006
1007 if (counter->cgrp)
1008 fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
1009
1010 fputc('\n', output);
1011 return;
1012 }
1013
1014 if (nsec_counter(counter))
1015 nsec_printout(-1, 0, counter, avg);
1016 else
1017 abs_printout(-1, 0, counter, avg);
1018
1019 print_noise(counter, avg);
1020
1021 if (csv_output) {
1022 fputc('\n', output);
1023 return;
1024 }
1025
1026 if (scaled) {
1027 double avg_enabled, avg_running;
1028
1029 avg_enabled = avg_stats(&ps->res_stats[1]);
1030 avg_running = avg_stats(&ps->res_stats[2]);
1031
1032 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
1033 }
1034 fprintf(output, "\n");
1035 }
1036
1037 /*
1038 * Print out the results of a single counter:
1039 * does not use aggregated count in system-wide
1040 */
1041 static void print_counter(struct perf_evsel *counter, char *prefix)
1042 {
1043 u64 ena, run, val;
1044 int cpu;
1045
1046 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1047 val = counter->counts->cpu[cpu].val;
1048 ena = counter->counts->cpu[cpu].ena;
1049 run = counter->counts->cpu[cpu].run;
1050
1051 if (prefix)
1052 fprintf(output, "%s", prefix);
1053
1054 if (run == 0 || ena == 0) {
1055 fprintf(output, "CPU%*d%s%*s%s%*s",
1056 csv_output ? 0 : -4,
1057 perf_evsel__cpus(counter)->map[cpu], csv_sep,
1058 csv_output ? 0 : 18,
1059 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1060 csv_sep,
1061 csv_output ? 0 : -24,
1062 perf_evsel__name(counter));
1063
1064 if (counter->cgrp)
1065 fprintf(output, "%s%s",
1066 csv_sep, counter->cgrp->name);
1067
1068 fputc('\n', output);
1069 continue;
1070 }
1071
1072 if (nsec_counter(counter))
1073 nsec_printout(cpu, 0, counter, val);
1074 else
1075 abs_printout(cpu, 0, counter, val);
1076
1077 if (!csv_output) {
1078 print_noise(counter, 1.0);
1079
1080 if (run != ena)
1081 fprintf(output, " (%.2f%%)",
1082 100.0 * run / ena);
1083 }
1084 fputc('\n', output);
1085 }
1086 }
1087
1088 static void print_stat(int argc, const char **argv)
1089 {
1090 struct perf_evsel *counter;
1091 int i;
1092
1093 fflush(stdout);
1094
1095 if (!csv_output) {
1096 fprintf(output, "\n");
1097 fprintf(output, " Performance counter stats for ");
1098 if (!perf_target__has_task(&target)) {
1099 fprintf(output, "\'%s", argv[0]);
1100 for (i = 1; i < argc; i++)
1101 fprintf(output, " %s", argv[i]);
1102 } else if (target.pid)
1103 fprintf(output, "process id \'%s", target.pid);
1104 else
1105 fprintf(output, "thread id \'%s", target.tid);
1106
1107 fprintf(output, "\'");
1108 if (run_count > 1)
1109 fprintf(output, " (%d runs)", run_count);
1110 fprintf(output, ":\n\n");
1111 }
1112
1113 switch (aggr_mode) {
1114 case AGGR_CORE:
1115 case AGGR_SOCKET:
1116 print_aggr(NULL);
1117 break;
1118 case AGGR_GLOBAL:
1119 list_for_each_entry(counter, &evsel_list->entries, node)
1120 print_counter_aggr(counter, NULL);
1121 break;
1122 case AGGR_NONE:
1123 list_for_each_entry(counter, &evsel_list->entries, node)
1124 print_counter(counter, NULL);
1125 break;
1126 default:
1127 break;
1128 }
1129
1130 if (!csv_output) {
1131 if (!null_run)
1132 fprintf(output, "\n");
1133 fprintf(output, " %17.9f seconds time elapsed",
1134 avg_stats(&walltime_nsecs_stats)/1e9);
1135 if (run_count > 1) {
1136 fprintf(output, " ");
1137 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1138 avg_stats(&walltime_nsecs_stats));
1139 }
1140 fprintf(output, "\n\n");
1141 }
1142 }
1143
1144 static volatile int signr = -1;
1145
1146 static void skip_signal(int signo)
1147 {
1148 if ((child_pid == -1) || interval)
1149 done = 1;
1150
1151 signr = signo;
1152 /*
1153 * render child_pid harmless
1154 * won't send SIGTERM to a random
1155 * process in case of race condition
1156 * and fast PID recycling
1157 */
1158 child_pid = -1;
1159 }
1160
1161 static void sig_atexit(void)
1162 {
1163 sigset_t set, oset;
1164
1165 /*
1166 * avoid race condition with SIGCHLD handler
1167 * in skip_signal() which is modifying child_pid
1168 * goal is to avoid send SIGTERM to a random
1169 * process
1170 */
1171 sigemptyset(&set);
1172 sigaddset(&set, SIGCHLD);
1173 sigprocmask(SIG_BLOCK, &set, &oset);
1174
1175 if (child_pid != -1)
1176 kill(child_pid, SIGTERM);
1177
1178 sigprocmask(SIG_SETMASK, &oset, NULL);
1179
1180 if (signr == -1)
1181 return;
1182
1183 signal(signr, SIG_DFL);
1184 kill(getpid(), signr);
1185 }
1186
1187 static int stat__set_big_num(const struct option *opt __maybe_unused,
1188 const char *s __maybe_unused, int unset)
1189 {
1190 big_num_opt = unset ? 0 : 1;
1191 return 0;
1192 }
1193
1194 static int perf_stat_init_aggr_mode(void)
1195 {
1196 switch (aggr_mode) {
1197 case AGGR_SOCKET:
1198 if (cpu_map__build_socket_map(evsel_list->cpus, &aggr_map)) {
1199 perror("cannot build socket map");
1200 return -1;
1201 }
1202 aggr_get_id = cpu_map__get_socket;
1203 break;
1204 case AGGR_CORE:
1205 if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
1206 perror("cannot build core map");
1207 return -1;
1208 }
1209 aggr_get_id = cpu_map__get_core;
1210 break;
1211 case AGGR_NONE:
1212 case AGGR_GLOBAL:
1213 default:
1214 break;
1215 }
1216 return 0;
1217 }
1218
1219
1220 /*
1221 * Add default attributes, if there were no attributes specified or
1222 * if -d/--detailed, -d -d or -d -d -d is used:
1223 */
1224 static int add_default_attributes(void)
1225 {
1226 struct perf_event_attr default_attrs[] = {
1227
1228 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
1229 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
1230 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
1231 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
1232
1233 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
1234 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1235 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
1236 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
1237 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
1238 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
1239
1240 };
1241
1242 /*
1243 * Detailed stats (-d), covering the L1 and last level data caches:
1244 */
1245 struct perf_event_attr detailed_attrs[] = {
1246
1247 { .type = PERF_TYPE_HW_CACHE,
1248 .config =
1249 PERF_COUNT_HW_CACHE_L1D << 0 |
1250 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1251 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1252
1253 { .type = PERF_TYPE_HW_CACHE,
1254 .config =
1255 PERF_COUNT_HW_CACHE_L1D << 0 |
1256 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1257 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1258
1259 { .type = PERF_TYPE_HW_CACHE,
1260 .config =
1261 PERF_COUNT_HW_CACHE_LL << 0 |
1262 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1263 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1264
1265 { .type = PERF_TYPE_HW_CACHE,
1266 .config =
1267 PERF_COUNT_HW_CACHE_LL << 0 |
1268 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1269 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1270 };
1271
1272 /*
1273 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1274 */
1275 struct perf_event_attr very_detailed_attrs[] = {
1276
1277 { .type = PERF_TYPE_HW_CACHE,
1278 .config =
1279 PERF_COUNT_HW_CACHE_L1I << 0 |
1280 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1281 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1282
1283 { .type = PERF_TYPE_HW_CACHE,
1284 .config =
1285 PERF_COUNT_HW_CACHE_L1I << 0 |
1286 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1287 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1288
1289 { .type = PERF_TYPE_HW_CACHE,
1290 .config =
1291 PERF_COUNT_HW_CACHE_DTLB << 0 |
1292 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1293 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1294
1295 { .type = PERF_TYPE_HW_CACHE,
1296 .config =
1297 PERF_COUNT_HW_CACHE_DTLB << 0 |
1298 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1299 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1300
1301 { .type = PERF_TYPE_HW_CACHE,
1302 .config =
1303 PERF_COUNT_HW_CACHE_ITLB << 0 |
1304 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1305 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1306
1307 { .type = PERF_TYPE_HW_CACHE,
1308 .config =
1309 PERF_COUNT_HW_CACHE_ITLB << 0 |
1310 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1311 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1312
1313 };
1314
1315 /*
1316 * Very, very detailed stats (-d -d -d), adding prefetch events:
1317 */
1318 struct perf_event_attr very_very_detailed_attrs[] = {
1319
1320 { .type = PERF_TYPE_HW_CACHE,
1321 .config =
1322 PERF_COUNT_HW_CACHE_L1D << 0 |
1323 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1324 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1325
1326 { .type = PERF_TYPE_HW_CACHE,
1327 .config =
1328 PERF_COUNT_HW_CACHE_L1D << 0 |
1329 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1330 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1331 };
1332
1333 /* Set attrs if no event is selected and !null_run: */
1334 if (null_run)
1335 return 0;
1336
1337 if (!evsel_list->nr_entries) {
1338 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1339 return -1;
1340 }
1341
1342 /* Detailed events get appended to the event list: */
1343
1344 if (detailed_run < 1)
1345 return 0;
1346
1347 /* Append detailed run extra attributes: */
1348 if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1349 return -1;
1350
1351 if (detailed_run < 2)
1352 return 0;
1353
1354 /* Append very detailed run extra attributes: */
1355 if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1356 return -1;
1357
1358 if (detailed_run < 3)
1359 return 0;
1360
1361 /* Append very, very detailed run extra attributes: */
1362 return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1363 }
1364
1365 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
1366 {
1367 bool append_file = false;
1368 int output_fd = 0;
1369 const char *output_name = NULL;
1370 const struct option options[] = {
1371 OPT_CALLBACK('e', "event", &evsel_list, "event",
1372 "event selector. use 'perf list' to list available events",
1373 parse_events_option),
1374 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1375 "event filter", parse_filter),
1376 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1377 "child tasks do not inherit counters"),
1378 OPT_STRING('p', "pid", &target.pid, "pid",
1379 "stat events on existing process id"),
1380 OPT_STRING('t', "tid", &target.tid, "tid",
1381 "stat events on existing thread id"),
1382 OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1383 "system-wide collection from all CPUs"),
1384 OPT_BOOLEAN('g', "group", &group,
1385 "put the counters into a counter group"),
1386 OPT_BOOLEAN('c', "scale", &scale, "scale/normalize counters"),
1387 OPT_INCR('v', "verbose", &verbose,
1388 "be more verbose (show counter open errors, etc)"),
1389 OPT_INTEGER('r', "repeat", &run_count,
1390 "repeat command and print average + stddev (max: 100, forever: 0)"),
1391 OPT_BOOLEAN('n', "null", &null_run,
1392 "null run - dont start any counters"),
1393 OPT_INCR('d', "detailed", &detailed_run,
1394 "detailed run - start a lot of events"),
1395 OPT_BOOLEAN('S', "sync", &sync_run,
1396 "call sync() before starting a run"),
1397 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1398 "print large numbers with thousands\' separators",
1399 stat__set_big_num),
1400 OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1401 "list of cpus to monitor in system-wide"),
1402 OPT_SET_UINT('A', "no-aggr", &aggr_mode,
1403 "disable CPU count aggregation", AGGR_NONE),
1404 OPT_STRING('x', "field-separator", &csv_sep, "separator",
1405 "print counts with custom separator"),
1406 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1407 "monitor event in cgroup name only", parse_cgroups),
1408 OPT_STRING('o', "output", &output_name, "file", "output file name"),
1409 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1410 OPT_INTEGER(0, "log-fd", &output_fd,
1411 "log output to fd, instead of stderr"),
1412 OPT_STRING(0, "pre", &pre_cmd, "command",
1413 "command to run prior to the measured command"),
1414 OPT_STRING(0, "post", &post_cmd, "command",
1415 "command to run after to the measured command"),
1416 OPT_UINTEGER('I', "interval-print", &interval,
1417 "print counts at regular interval in ms (>= 100)"),
1418 OPT_SET_UINT(0, "per-socket", &aggr_mode,
1419 "aggregate counts per processor socket", AGGR_SOCKET),
1420 OPT_SET_UINT(0, "per-core", &aggr_mode,
1421 "aggregate counts per physical processor core", AGGR_CORE),
1422 OPT_END()
1423 };
1424 const char * const stat_usage[] = {
1425 "perf stat [<options>] [<command>]",
1426 NULL
1427 };
1428 int status = -ENOMEM, run_idx;
1429 const char *mode;
1430
1431 setlocale(LC_ALL, "");
1432
1433 evsel_list = perf_evlist__new();
1434 if (evsel_list == NULL)
1435 return -ENOMEM;
1436
1437 argc = parse_options(argc, argv, options, stat_usage,
1438 PARSE_OPT_STOP_AT_NON_OPTION);
1439
1440 output = stderr;
1441 if (output_name && strcmp(output_name, "-"))
1442 output = NULL;
1443
1444 if (output_name && output_fd) {
1445 fprintf(stderr, "cannot use both --output and --log-fd\n");
1446 usage_with_options(stat_usage, options);
1447 }
1448
1449 if (output_fd < 0) {
1450 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1451 usage_with_options(stat_usage, options);
1452 }
1453
1454 if (!output) {
1455 struct timespec tm;
1456 mode = append_file ? "a" : "w";
1457
1458 output = fopen(output_name, mode);
1459 if (!output) {
1460 perror("failed to create output file");
1461 return -1;
1462 }
1463 clock_gettime(CLOCK_REALTIME, &tm);
1464 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1465 } else if (output_fd > 0) {
1466 mode = append_file ? "a" : "w";
1467 output = fdopen(output_fd, mode);
1468 if (!output) {
1469 perror("Failed opening logfd");
1470 return -errno;
1471 }
1472 }
1473
1474 if (csv_sep) {
1475 csv_output = true;
1476 if (!strcmp(csv_sep, "\\t"))
1477 csv_sep = "\t";
1478 } else
1479 csv_sep = DEFAULT_SEPARATOR;
1480
1481 /*
1482 * let the spreadsheet do the pretty-printing
1483 */
1484 if (csv_output) {
1485 /* User explicitly passed -B? */
1486 if (big_num_opt == 1) {
1487 fprintf(stderr, "-B option not supported with -x\n");
1488 usage_with_options(stat_usage, options);
1489 } else /* Nope, so disable big number formatting */
1490 big_num = false;
1491 } else if (big_num_opt == 0) /* User passed --no-big-num */
1492 big_num = false;
1493
1494 if (!argc && !perf_target__has_task(&target))
1495 usage_with_options(stat_usage, options);
1496 if (run_count < 0) {
1497 usage_with_options(stat_usage, options);
1498 } else if (run_count == 0) {
1499 forever = true;
1500 run_count = 1;
1501 }
1502
1503 /* no_aggr, cgroup are for system-wide only */
1504 if ((aggr_mode != AGGR_GLOBAL || nr_cgroups)
1505 && !perf_target__has_cpu(&target)) {
1506 fprintf(stderr, "both cgroup and no-aggregation "
1507 "modes only available in system-wide mode\n");
1508
1509 usage_with_options(stat_usage, options);
1510 return -1;
1511 }
1512
1513 if (add_default_attributes())
1514 goto out;
1515
1516 perf_target__validate(&target);
1517
1518 if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1519 if (perf_target__has_task(&target))
1520 pr_err("Problems finding threads of monitor\n");
1521 if (perf_target__has_cpu(&target))
1522 perror("failed to parse CPUs map");
1523
1524 usage_with_options(stat_usage, options);
1525 return -1;
1526 }
1527 if (interval && interval < 100) {
1528 pr_err("print interval must be >= 100ms\n");
1529 usage_with_options(stat_usage, options);
1530 return -1;
1531 }
1532
1533 if (perf_evlist__alloc_stats(evsel_list, interval))
1534 goto out_free_maps;
1535
1536 if (perf_stat_init_aggr_mode())
1537 goto out;
1538
1539 /*
1540 * We dont want to block the signals - that would cause
1541 * child tasks to inherit that and Ctrl-C would not work.
1542 * What we want is for Ctrl-C to work in the exec()-ed
1543 * task, but being ignored by perf stat itself:
1544 */
1545 atexit(sig_atexit);
1546 if (!forever)
1547 signal(SIGINT, skip_signal);
1548 signal(SIGCHLD, skip_signal);
1549 signal(SIGALRM, skip_signal);
1550 signal(SIGABRT, skip_signal);
1551
1552 status = 0;
1553 for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
1554 if (run_count != 1 && verbose)
1555 fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1556 run_idx + 1);
1557
1558 status = run_perf_stat(argc, argv);
1559 if (forever && status != -1) {
1560 print_stat(argc, argv);
1561 perf_stat__reset_stats(evsel_list);
1562 }
1563 }
1564
1565 if (!forever && status != -1 && !interval)
1566 print_stat(argc, argv);
1567
1568 perf_evlist__free_stats(evsel_list);
1569 out_free_maps:
1570 perf_evlist__delete_maps(evsel_list);
1571 out:
1572 perf_evlist__delete(evsel_list);
1573 return status;
1574 }
Linus' kernel tree