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Merge branch 'for-3.15' of git://linux-nfs.org/~bfields/linux
[mirror_ubuntu-artful-kernel.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/pmu.h"
50 #include "util/event.h"
51 #include "util/evlist.h"
52 #include "util/evsel.h"
53 #include "util/debug.h"
54 #include "util/color.h"
55 #include "util/stat.h"
56 #include "util/header.h"
57 #include "util/cpumap.h"
58 #include "util/thread.h"
59 #include "util/thread_map.h"
60
61 #include <stdlib.h>
62 #include <sys/prctl.h>
63 #include <locale.h>
64
65 #define DEFAULT_SEPARATOR " "
66 #define CNTR_NOT_SUPPORTED "<not supported>"
67 #define CNTR_NOT_COUNTED "<not counted>"
68
69 static void print_stat(int argc, const char **argv);
70 static void print_counter_aggr(struct perf_evsel *counter, char *prefix);
71 static void print_counter(struct perf_evsel *counter, char *prefix);
72 static void print_aggr(char *prefix);
73
74 /* Default events used for perf stat -T */
75 static const char * const transaction_attrs[] = {
76 "task-clock",
77 "{"
78 "instructions,"
79 "cycles,"
80 "cpu/cycles-t/,"
81 "cpu/tx-start/,"
82 "cpu/el-start/,"
83 "cpu/cycles-ct/"
84 "}"
85 };
86
87 /* More limited version when the CPU does not have all events. */
88 static const char * const transaction_limited_attrs[] = {
89 "task-clock",
90 "{"
91 "instructions,"
92 "cycles,"
93 "cpu/cycles-t/,"
94 "cpu/tx-start/"
95 "}"
96 };
97
98 /* must match transaction_attrs and the beginning limited_attrs */
99 enum {
100 T_TASK_CLOCK,
101 T_INSTRUCTIONS,
102 T_CYCLES,
103 T_CYCLES_IN_TX,
104 T_TRANSACTION_START,
105 T_ELISION_START,
106 T_CYCLES_IN_TX_CP,
107 };
108
109 static struct perf_evlist *evsel_list;
110
111 static struct target target = {
112 .uid = UINT_MAX,
113 };
114
115 enum aggr_mode {
116 AGGR_NONE,
117 AGGR_GLOBAL,
118 AGGR_SOCKET,
119 AGGR_CORE,
120 };
121
122 static int run_count = 1;
123 static bool no_inherit = false;
124 static bool scale = true;
125 static enum aggr_mode aggr_mode = AGGR_GLOBAL;
126 static volatile pid_t child_pid = -1;
127 static bool null_run = false;
128 static int detailed_run = 0;
129 static bool transaction_run;
130 static bool big_num = true;
131 static int big_num_opt = -1;
132 static const char *csv_sep = NULL;
133 static bool csv_output = false;
134 static bool group = false;
135 static FILE *output = NULL;
136 static const char *pre_cmd = NULL;
137 static const char *post_cmd = NULL;
138 static bool sync_run = false;
139 static unsigned int interval = 0;
140 static unsigned int initial_delay = 0;
141 static unsigned int unit_width = 4; /* strlen("unit") */
142 static bool forever = false;
143 static struct timespec ref_time;
144 static struct cpu_map *aggr_map;
145 static int (*aggr_get_id)(struct cpu_map *m, int cpu);
146
147 static volatile int done = 0;
148
149 struct perf_stat {
150 struct stats res_stats[3];
151 };
152
153 static inline void diff_timespec(struct timespec *r, struct timespec *a,
154 struct timespec *b)
155 {
156 r->tv_sec = a->tv_sec - b->tv_sec;
157 if (a->tv_nsec < b->tv_nsec) {
158 r->tv_nsec = a->tv_nsec + 1000000000L - b->tv_nsec;
159 r->tv_sec--;
160 } else {
161 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
162 }
163 }
164
165 static inline struct cpu_map *perf_evsel__cpus(struct perf_evsel *evsel)
166 {
167 return (evsel->cpus && !target.cpu_list) ? evsel->cpus : evsel_list->cpus;
168 }
169
170 static inline int perf_evsel__nr_cpus(struct perf_evsel *evsel)
171 {
172 return perf_evsel__cpus(evsel)->nr;
173 }
174
175 static void perf_evsel__reset_stat_priv(struct perf_evsel *evsel)
176 {
177 memset(evsel->priv, 0, sizeof(struct perf_stat));
178 }
179
180 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
181 {
182 evsel->priv = zalloc(sizeof(struct perf_stat));
183 return evsel->priv == NULL ? -ENOMEM : 0;
184 }
185
186 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
187 {
188 zfree(&evsel->priv);
189 }
190
191 static int perf_evsel__alloc_prev_raw_counts(struct perf_evsel *evsel)
192 {
193 void *addr;
194 size_t sz;
195
196 sz = sizeof(*evsel->counts) +
197 (perf_evsel__nr_cpus(evsel) * sizeof(struct perf_counts_values));
198
199 addr = zalloc(sz);
200 if (!addr)
201 return -ENOMEM;
202
203 evsel->prev_raw_counts = addr;
204
205 return 0;
206 }
207
208 static void perf_evsel__free_prev_raw_counts(struct perf_evsel *evsel)
209 {
210 zfree(&evsel->prev_raw_counts);
211 }
212
213 static void perf_evlist__free_stats(struct perf_evlist *evlist)
214 {
215 struct perf_evsel *evsel;
216
217 evlist__for_each(evlist, evsel) {
218 perf_evsel__free_stat_priv(evsel);
219 perf_evsel__free_counts(evsel);
220 perf_evsel__free_prev_raw_counts(evsel);
221 }
222 }
223
224 static int perf_evlist__alloc_stats(struct perf_evlist *evlist, bool alloc_raw)
225 {
226 struct perf_evsel *evsel;
227
228 evlist__for_each(evlist, evsel) {
229 if (perf_evsel__alloc_stat_priv(evsel) < 0 ||
230 perf_evsel__alloc_counts(evsel, perf_evsel__nr_cpus(evsel)) < 0 ||
231 (alloc_raw && perf_evsel__alloc_prev_raw_counts(evsel) < 0))
232 goto out_free;
233 }
234
235 return 0;
236
237 out_free:
238 perf_evlist__free_stats(evlist);
239 return -1;
240 }
241
242 static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
243 static struct stats runtime_cycles_stats[MAX_NR_CPUS];
244 static struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
245 static struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
246 static struct stats runtime_branches_stats[MAX_NR_CPUS];
247 static struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
248 static struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
249 static struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
250 static struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
251 static struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
252 static struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
253 static struct stats runtime_cycles_in_tx_stats[MAX_NR_CPUS];
254 static struct stats walltime_nsecs_stats;
255 static struct stats runtime_transaction_stats[MAX_NR_CPUS];
256 static struct stats runtime_elision_stats[MAX_NR_CPUS];
257
258 static void perf_stat__reset_stats(struct perf_evlist *evlist)
259 {
260 struct perf_evsel *evsel;
261
262 evlist__for_each(evlist, evsel) {
263 perf_evsel__reset_stat_priv(evsel);
264 perf_evsel__reset_counts(evsel, perf_evsel__nr_cpus(evsel));
265 }
266
267 memset(runtime_nsecs_stats, 0, sizeof(runtime_nsecs_stats));
268 memset(runtime_cycles_stats, 0, sizeof(runtime_cycles_stats));
269 memset(runtime_stalled_cycles_front_stats, 0, sizeof(runtime_stalled_cycles_front_stats));
270 memset(runtime_stalled_cycles_back_stats, 0, sizeof(runtime_stalled_cycles_back_stats));
271 memset(runtime_branches_stats, 0, sizeof(runtime_branches_stats));
272 memset(runtime_cacherefs_stats, 0, sizeof(runtime_cacherefs_stats));
273 memset(runtime_l1_dcache_stats, 0, sizeof(runtime_l1_dcache_stats));
274 memset(runtime_l1_icache_stats, 0, sizeof(runtime_l1_icache_stats));
275 memset(runtime_ll_cache_stats, 0, sizeof(runtime_ll_cache_stats));
276 memset(runtime_itlb_cache_stats, 0, sizeof(runtime_itlb_cache_stats));
277 memset(runtime_dtlb_cache_stats, 0, sizeof(runtime_dtlb_cache_stats));
278 memset(runtime_cycles_in_tx_stats, 0,
279 sizeof(runtime_cycles_in_tx_stats));
280 memset(runtime_transaction_stats, 0,
281 sizeof(runtime_transaction_stats));
282 memset(runtime_elision_stats, 0, sizeof(runtime_elision_stats));
283 memset(&walltime_nsecs_stats, 0, sizeof(walltime_nsecs_stats));
284 }
285
286 static int create_perf_stat_counter(struct perf_evsel *evsel)
287 {
288 struct perf_event_attr *attr = &evsel->attr;
289
290 if (scale)
291 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
292 PERF_FORMAT_TOTAL_TIME_RUNNING;
293
294 attr->inherit = !no_inherit;
295
296 if (target__has_cpu(&target))
297 return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
298
299 if (!target__has_task(&target) && perf_evsel__is_group_leader(evsel)) {
300 attr->disabled = 1;
301 if (!initial_delay)
302 attr->enable_on_exec = 1;
303 }
304
305 return perf_evsel__open_per_thread(evsel, evsel_list->threads);
306 }
307
308 /*
309 * Does the counter have nsecs as a unit?
310 */
311 static inline int nsec_counter(struct perf_evsel *evsel)
312 {
313 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
314 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
315 return 1;
316
317 return 0;
318 }
319
320 static struct perf_evsel *nth_evsel(int n)
321 {
322 static struct perf_evsel **array;
323 static int array_len;
324 struct perf_evsel *ev;
325 int j;
326
327 /* Assumes this only called when evsel_list does not change anymore. */
328 if (!array) {
329 evlist__for_each(evsel_list, ev)
330 array_len++;
331 array = malloc(array_len * sizeof(void *));
332 if (!array)
333 exit(ENOMEM);
334 j = 0;
335 evlist__for_each(evsel_list, ev)
336 array[j++] = ev;
337 }
338 if (n < array_len)
339 return array[n];
340 return NULL;
341 }
342
343 /*
344 * Update various tracking values we maintain to print
345 * more semantic information such as miss/hit ratios,
346 * instruction rates, etc:
347 */
348 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
349 {
350 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
351 update_stats(&runtime_nsecs_stats[0], count[0]);
352 else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
353 update_stats(&runtime_cycles_stats[0], count[0]);
354 else if (transaction_run &&
355 perf_evsel__cmp(counter, nth_evsel(T_CYCLES_IN_TX)))
356 update_stats(&runtime_cycles_in_tx_stats[0], count[0]);
357 else if (transaction_run &&
358 perf_evsel__cmp(counter, nth_evsel(T_TRANSACTION_START)))
359 update_stats(&runtime_transaction_stats[0], count[0]);
360 else if (transaction_run &&
361 perf_evsel__cmp(counter, nth_evsel(T_ELISION_START)))
362 update_stats(&runtime_elision_stats[0], count[0]);
363 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
364 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
365 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
366 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
367 else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
368 update_stats(&runtime_branches_stats[0], count[0]);
369 else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
370 update_stats(&runtime_cacherefs_stats[0], count[0]);
371 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
372 update_stats(&runtime_l1_dcache_stats[0], count[0]);
373 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
374 update_stats(&runtime_l1_icache_stats[0], count[0]);
375 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
376 update_stats(&runtime_ll_cache_stats[0], count[0]);
377 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
378 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
379 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
380 update_stats(&runtime_itlb_cache_stats[0], count[0]);
381 }
382
383 /*
384 * Read out the results of a single counter:
385 * aggregate counts across CPUs in system-wide mode
386 */
387 static int read_counter_aggr(struct perf_evsel *counter)
388 {
389 struct perf_stat *ps = counter->priv;
390 u64 *count = counter->counts->aggr.values;
391 int i;
392
393 if (__perf_evsel__read(counter, perf_evsel__nr_cpus(counter),
394 thread_map__nr(evsel_list->threads), scale) < 0)
395 return -1;
396
397 for (i = 0; i < 3; i++)
398 update_stats(&ps->res_stats[i], count[i]);
399
400 if (verbose) {
401 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
402 perf_evsel__name(counter), count[0], count[1], count[2]);
403 }
404
405 /*
406 * Save the full runtime - to allow normalization during printout:
407 */
408 update_shadow_stats(counter, count);
409
410 return 0;
411 }
412
413 /*
414 * Read out the results of a single counter:
415 * do not aggregate counts across CPUs in system-wide mode
416 */
417 static int read_counter(struct perf_evsel *counter)
418 {
419 u64 *count;
420 int cpu;
421
422 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
423 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
424 return -1;
425
426 count = counter->counts->cpu[cpu].values;
427
428 update_shadow_stats(counter, count);
429 }
430
431 return 0;
432 }
433
434 static void print_interval(void)
435 {
436 static int num_print_interval;
437 struct perf_evsel *counter;
438 struct perf_stat *ps;
439 struct timespec ts, rs;
440 char prefix[64];
441
442 if (aggr_mode == AGGR_GLOBAL) {
443 evlist__for_each(evsel_list, counter) {
444 ps = counter->priv;
445 memset(ps->res_stats, 0, sizeof(ps->res_stats));
446 read_counter_aggr(counter);
447 }
448 } else {
449 evlist__for_each(evsel_list, counter) {
450 ps = counter->priv;
451 memset(ps->res_stats, 0, sizeof(ps->res_stats));
452 read_counter(counter);
453 }
454 }
455
456 clock_gettime(CLOCK_MONOTONIC, &ts);
457 diff_timespec(&rs, &ts, &ref_time);
458 sprintf(prefix, "%6lu.%09lu%s", rs.tv_sec, rs.tv_nsec, csv_sep);
459
460 if (num_print_interval == 0 && !csv_output) {
461 switch (aggr_mode) {
462 case AGGR_SOCKET:
463 fprintf(output, "# time socket cpus counts %*s events\n", unit_width, "unit");
464 break;
465 case AGGR_CORE:
466 fprintf(output, "# time core cpus counts %*s events\n", unit_width, "unit");
467 break;
468 case AGGR_NONE:
469 fprintf(output, "# time CPU counts %*s events\n", unit_width, "unit");
470 break;
471 case AGGR_GLOBAL:
472 default:
473 fprintf(output, "# time counts %*s events\n", unit_width, "unit");
474 }
475 }
476
477 if (++num_print_interval == 25)
478 num_print_interval = 0;
479
480 switch (aggr_mode) {
481 case AGGR_CORE:
482 case AGGR_SOCKET:
483 print_aggr(prefix);
484 break;
485 case AGGR_NONE:
486 evlist__for_each(evsel_list, counter)
487 print_counter(counter, prefix);
488 break;
489 case AGGR_GLOBAL:
490 default:
491 evlist__for_each(evsel_list, counter)
492 print_counter_aggr(counter, prefix);
493 }
494
495 fflush(output);
496 }
497
498 static void handle_initial_delay(void)
499 {
500 struct perf_evsel *counter;
501
502 if (initial_delay) {
503 const int ncpus = cpu_map__nr(evsel_list->cpus),
504 nthreads = thread_map__nr(evsel_list->threads);
505
506 usleep(initial_delay * 1000);
507 evlist__for_each(evsel_list, counter)
508 perf_evsel__enable(counter, ncpus, nthreads);
509 }
510 }
511
512 static volatile int workload_exec_errno;
513
514 /*
515 * perf_evlist__prepare_workload will send a SIGUSR1
516 * if the fork fails, since we asked by setting its
517 * want_signal to true.
518 */
519 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
520 void *ucontext __maybe_unused)
521 {
522 workload_exec_errno = info->si_value.sival_int;
523 }
524
525 static int __run_perf_stat(int argc, const char **argv)
526 {
527 char msg[512];
528 unsigned long long t0, t1;
529 struct perf_evsel *counter;
530 struct timespec ts;
531 size_t l;
532 int status = 0;
533 const bool forks = (argc > 0);
534
535 if (interval) {
536 ts.tv_sec = interval / 1000;
537 ts.tv_nsec = (interval % 1000) * 1000000;
538 } else {
539 ts.tv_sec = 1;
540 ts.tv_nsec = 0;
541 }
542
543 if (forks) {
544 if (perf_evlist__prepare_workload(evsel_list, &target, argv, false,
545 workload_exec_failed_signal) < 0) {
546 perror("failed to prepare workload");
547 return -1;
548 }
549 child_pid = evsel_list->workload.pid;
550 }
551
552 if (group)
553 perf_evlist__set_leader(evsel_list);
554
555 evlist__for_each(evsel_list, counter) {
556 if (create_perf_stat_counter(counter) < 0) {
557 /*
558 * PPC returns ENXIO for HW counters until 2.6.37
559 * (behavior changed with commit b0a873e).
560 */
561 if (errno == EINVAL || errno == ENOSYS ||
562 errno == ENOENT || errno == EOPNOTSUPP ||
563 errno == ENXIO) {
564 if (verbose)
565 ui__warning("%s event is not supported by the kernel.\n",
566 perf_evsel__name(counter));
567 counter->supported = false;
568 continue;
569 }
570
571 perf_evsel__open_strerror(counter, &target,
572 errno, msg, sizeof(msg));
573 ui__error("%s\n", msg);
574
575 if (child_pid != -1)
576 kill(child_pid, SIGTERM);
577
578 return -1;
579 }
580 counter->supported = true;
581
582 l = strlen(counter->unit);
583 if (l > unit_width)
584 unit_width = l;
585 }
586
587 if (perf_evlist__apply_filters(evsel_list)) {
588 error("failed to set filter with %d (%s)\n", errno,
589 strerror(errno));
590 return -1;
591 }
592
593 /*
594 * Enable counters and exec the command:
595 */
596 t0 = rdclock();
597 clock_gettime(CLOCK_MONOTONIC, &ref_time);
598
599 if (forks) {
600 perf_evlist__start_workload(evsel_list);
601 handle_initial_delay();
602
603 if (interval) {
604 while (!waitpid(child_pid, &status, WNOHANG)) {
605 nanosleep(&ts, NULL);
606 print_interval();
607 }
608 }
609 wait(&status);
610
611 if (workload_exec_errno) {
612 const char *emsg = strerror_r(workload_exec_errno, msg, sizeof(msg));
613 pr_err("Workload failed: %s\n", emsg);
614 return -1;
615 }
616
617 if (WIFSIGNALED(status))
618 psignal(WTERMSIG(status), argv[0]);
619 } else {
620 handle_initial_delay();
621 while (!done) {
622 nanosleep(&ts, NULL);
623 if (interval)
624 print_interval();
625 }
626 }
627
628 t1 = rdclock();
629
630 update_stats(&walltime_nsecs_stats, t1 - t0);
631
632 if (aggr_mode == AGGR_GLOBAL) {
633 evlist__for_each(evsel_list, counter) {
634 read_counter_aggr(counter);
635 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
636 thread_map__nr(evsel_list->threads));
637 }
638 } else {
639 evlist__for_each(evsel_list, counter) {
640 read_counter(counter);
641 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
642 }
643 }
644
645 return WEXITSTATUS(status);
646 }
647
648 static int run_perf_stat(int argc, const char **argv)
649 {
650 int ret;
651
652 if (pre_cmd) {
653 ret = system(pre_cmd);
654 if (ret)
655 return ret;
656 }
657
658 if (sync_run)
659 sync();
660
661 ret = __run_perf_stat(argc, argv);
662 if (ret)
663 return ret;
664
665 if (post_cmd) {
666 ret = system(post_cmd);
667 if (ret)
668 return ret;
669 }
670
671 return ret;
672 }
673
674 static void print_noise_pct(double total, double avg)
675 {
676 double pct = rel_stddev_stats(total, avg);
677
678 if (csv_output)
679 fprintf(output, "%s%.2f%%", csv_sep, pct);
680 else if (pct)
681 fprintf(output, " ( +-%6.2f%% )", pct);
682 }
683
684 static void print_noise(struct perf_evsel *evsel, double avg)
685 {
686 struct perf_stat *ps;
687
688 if (run_count == 1)
689 return;
690
691 ps = evsel->priv;
692 print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
693 }
694
695 static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
696 {
697 switch (aggr_mode) {
698 case AGGR_CORE:
699 fprintf(output, "S%d-C%*d%s%*d%s",
700 cpu_map__id_to_socket(id),
701 csv_output ? 0 : -8,
702 cpu_map__id_to_cpu(id),
703 csv_sep,
704 csv_output ? 0 : 4,
705 nr,
706 csv_sep);
707 break;
708 case AGGR_SOCKET:
709 fprintf(output, "S%*d%s%*d%s",
710 csv_output ? 0 : -5,
711 id,
712 csv_sep,
713 csv_output ? 0 : 4,
714 nr,
715 csv_sep);
716 break;
717 case AGGR_NONE:
718 fprintf(output, "CPU%*d%s",
719 csv_output ? 0 : -4,
720 perf_evsel__cpus(evsel)->map[id], csv_sep);
721 break;
722 case AGGR_GLOBAL:
723 default:
724 break;
725 }
726 }
727
728 static void nsec_printout(int cpu, int nr, struct perf_evsel *evsel, double avg)
729 {
730 double msecs = avg / 1e6;
731 const char *fmt_v, *fmt_n;
732 char name[25];
733
734 fmt_v = csv_output ? "%.6f%s" : "%18.6f%s";
735 fmt_n = csv_output ? "%s" : "%-25s";
736
737 aggr_printout(evsel, cpu, nr);
738
739 scnprintf(name, sizeof(name), "%s%s",
740 perf_evsel__name(evsel), csv_output ? "" : " (msec)");
741
742 fprintf(output, fmt_v, msecs, csv_sep);
743
744 if (csv_output)
745 fprintf(output, "%s%s", evsel->unit, csv_sep);
746 else
747 fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep);
748
749 fprintf(output, fmt_n, name);
750
751 if (evsel->cgrp)
752 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
753
754 if (csv_output || interval)
755 return;
756
757 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
758 fprintf(output, " # %8.3f CPUs utilized ",
759 avg / avg_stats(&walltime_nsecs_stats));
760 else
761 fprintf(output, " ");
762 }
763
764 /* used for get_ratio_color() */
765 enum grc_type {
766 GRC_STALLED_CYCLES_FE,
767 GRC_STALLED_CYCLES_BE,
768 GRC_CACHE_MISSES,
769 GRC_MAX_NR
770 };
771
772 static const char *get_ratio_color(enum grc_type type, double ratio)
773 {
774 static const double grc_table[GRC_MAX_NR][3] = {
775 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
776 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
777 [GRC_CACHE_MISSES] = { 20.0, 10.0, 5.0 },
778 };
779 const char *color = PERF_COLOR_NORMAL;
780
781 if (ratio > grc_table[type][0])
782 color = PERF_COLOR_RED;
783 else if (ratio > grc_table[type][1])
784 color = PERF_COLOR_MAGENTA;
785 else if (ratio > grc_table[type][2])
786 color = PERF_COLOR_YELLOW;
787
788 return color;
789 }
790
791 static void print_stalled_cycles_frontend(int cpu,
792 struct perf_evsel *evsel
793 __maybe_unused, double avg)
794 {
795 double total, ratio = 0.0;
796 const char *color;
797
798 total = avg_stats(&runtime_cycles_stats[cpu]);
799
800 if (total)
801 ratio = avg / total * 100.0;
802
803 color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
804
805 fprintf(output, " # ");
806 color_fprintf(output, color, "%6.2f%%", ratio);
807 fprintf(output, " frontend cycles idle ");
808 }
809
810 static void print_stalled_cycles_backend(int cpu,
811 struct perf_evsel *evsel
812 __maybe_unused, double avg)
813 {
814 double total, ratio = 0.0;
815 const char *color;
816
817 total = avg_stats(&runtime_cycles_stats[cpu]);
818
819 if (total)
820 ratio = avg / total * 100.0;
821
822 color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
823
824 fprintf(output, " # ");
825 color_fprintf(output, color, "%6.2f%%", ratio);
826 fprintf(output, " backend cycles idle ");
827 }
828
829 static void print_branch_misses(int cpu,
830 struct perf_evsel *evsel __maybe_unused,
831 double avg)
832 {
833 double total, ratio = 0.0;
834 const char *color;
835
836 total = avg_stats(&runtime_branches_stats[cpu]);
837
838 if (total)
839 ratio = avg / total * 100.0;
840
841 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
842
843 fprintf(output, " # ");
844 color_fprintf(output, color, "%6.2f%%", ratio);
845 fprintf(output, " of all branches ");
846 }
847
848 static void print_l1_dcache_misses(int cpu,
849 struct perf_evsel *evsel __maybe_unused,
850 double avg)
851 {
852 double total, ratio = 0.0;
853 const char *color;
854
855 total = avg_stats(&runtime_l1_dcache_stats[cpu]);
856
857 if (total)
858 ratio = avg / total * 100.0;
859
860 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
861
862 fprintf(output, " # ");
863 color_fprintf(output, color, "%6.2f%%", ratio);
864 fprintf(output, " of all L1-dcache hits ");
865 }
866
867 static void print_l1_icache_misses(int cpu,
868 struct perf_evsel *evsel __maybe_unused,
869 double avg)
870 {
871 double total, ratio = 0.0;
872 const char *color;
873
874 total = avg_stats(&runtime_l1_icache_stats[cpu]);
875
876 if (total)
877 ratio = avg / total * 100.0;
878
879 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
880
881 fprintf(output, " # ");
882 color_fprintf(output, color, "%6.2f%%", ratio);
883 fprintf(output, " of all L1-icache hits ");
884 }
885
886 static void print_dtlb_cache_misses(int cpu,
887 struct perf_evsel *evsel __maybe_unused,
888 double avg)
889 {
890 double total, ratio = 0.0;
891 const char *color;
892
893 total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
894
895 if (total)
896 ratio = avg / total * 100.0;
897
898 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
899
900 fprintf(output, " # ");
901 color_fprintf(output, color, "%6.2f%%", ratio);
902 fprintf(output, " of all dTLB cache hits ");
903 }
904
905 static void print_itlb_cache_misses(int cpu,
906 struct perf_evsel *evsel __maybe_unused,
907 double avg)
908 {
909 double total, ratio = 0.0;
910 const char *color;
911
912 total = avg_stats(&runtime_itlb_cache_stats[cpu]);
913
914 if (total)
915 ratio = avg / total * 100.0;
916
917 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
918
919 fprintf(output, " # ");
920 color_fprintf(output, color, "%6.2f%%", ratio);
921 fprintf(output, " of all iTLB cache hits ");
922 }
923
924 static void print_ll_cache_misses(int cpu,
925 struct perf_evsel *evsel __maybe_unused,
926 double avg)
927 {
928 double total, ratio = 0.0;
929 const char *color;
930
931 total = avg_stats(&runtime_ll_cache_stats[cpu]);
932
933 if (total)
934 ratio = avg / total * 100.0;
935
936 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
937
938 fprintf(output, " # ");
939 color_fprintf(output, color, "%6.2f%%", ratio);
940 fprintf(output, " of all LL-cache hits ");
941 }
942
943 static void abs_printout(int cpu, int nr, struct perf_evsel *evsel, double avg)
944 {
945 double total, ratio = 0.0, total2;
946 double sc = evsel->scale;
947 const char *fmt;
948
949 if (csv_output) {
950 fmt = sc != 1.0 ? "%.2f%s" : "%.0f%s";
951 } else {
952 if (big_num)
953 fmt = sc != 1.0 ? "%'18.2f%s" : "%'18.0f%s";
954 else
955 fmt = sc != 1.0 ? "%18.2f%s" : "%18.0f%s";
956 }
957
958 aggr_printout(evsel, cpu, nr);
959
960 if (aggr_mode == AGGR_GLOBAL)
961 cpu = 0;
962
963 fprintf(output, fmt, avg, csv_sep);
964
965 if (evsel->unit)
966 fprintf(output, "%-*s%s",
967 csv_output ? 0 : unit_width,
968 evsel->unit, csv_sep);
969
970 fprintf(output, "%-*s", csv_output ? 0 : 25, perf_evsel__name(evsel));
971
972 if (evsel->cgrp)
973 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
974
975 if (csv_output || interval)
976 return;
977
978 if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
979 total = avg_stats(&runtime_cycles_stats[cpu]);
980 if (total) {
981 ratio = avg / total;
982 fprintf(output, " # %5.2f insns per cycle ", ratio);
983 }
984 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
985 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
986
987 if (total && avg) {
988 ratio = total / avg;
989 fprintf(output, "\n");
990 if (aggr_mode == AGGR_NONE)
991 fprintf(output, " ");
992 fprintf(output, " # %5.2f stalled cycles per insn", ratio);
993 }
994
995 } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
996 runtime_branches_stats[cpu].n != 0) {
997 print_branch_misses(cpu, evsel, avg);
998 } else if (
999 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1000 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1D |
1001 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1002 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1003 runtime_l1_dcache_stats[cpu].n != 0) {
1004 print_l1_dcache_misses(cpu, evsel, avg);
1005 } else if (
1006 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1007 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1I |
1008 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1009 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1010 runtime_l1_icache_stats[cpu].n != 0) {
1011 print_l1_icache_misses(cpu, evsel, avg);
1012 } else if (
1013 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1014 evsel->attr.config == ( PERF_COUNT_HW_CACHE_DTLB |
1015 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1016 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1017 runtime_dtlb_cache_stats[cpu].n != 0) {
1018 print_dtlb_cache_misses(cpu, evsel, avg);
1019 } else if (
1020 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1021 evsel->attr.config == ( PERF_COUNT_HW_CACHE_ITLB |
1022 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1023 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1024 runtime_itlb_cache_stats[cpu].n != 0) {
1025 print_itlb_cache_misses(cpu, evsel, avg);
1026 } else if (
1027 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1028 evsel->attr.config == ( PERF_COUNT_HW_CACHE_LL |
1029 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1030 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1031 runtime_ll_cache_stats[cpu].n != 0) {
1032 print_ll_cache_misses(cpu, evsel, avg);
1033 } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
1034 runtime_cacherefs_stats[cpu].n != 0) {
1035 total = avg_stats(&runtime_cacherefs_stats[cpu]);
1036
1037 if (total)
1038 ratio = avg * 100 / total;
1039
1040 fprintf(output, " # %8.3f %% of all cache refs ", ratio);
1041
1042 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
1043 print_stalled_cycles_frontend(cpu, evsel, avg);
1044 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
1045 print_stalled_cycles_backend(cpu, evsel, avg);
1046 } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
1047 total = avg_stats(&runtime_nsecs_stats[cpu]);
1048
1049 if (total) {
1050 ratio = avg / total;
1051 fprintf(output, " # %8.3f GHz ", ratio);
1052 }
1053 } else if (transaction_run &&
1054 perf_evsel__cmp(evsel, nth_evsel(T_CYCLES_IN_TX))) {
1055 total = avg_stats(&runtime_cycles_stats[cpu]);
1056 if (total)
1057 fprintf(output,
1058 " # %5.2f%% transactional cycles ",
1059 100.0 * (avg / total));
1060 } else if (transaction_run &&
1061 perf_evsel__cmp(evsel, nth_evsel(T_CYCLES_IN_TX_CP))) {
1062 total = avg_stats(&runtime_cycles_stats[cpu]);
1063 total2 = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
1064 if (total2 < avg)
1065 total2 = avg;
1066 if (total)
1067 fprintf(output,
1068 " # %5.2f%% aborted cycles ",
1069 100.0 * ((total2-avg) / total));
1070 } else if (transaction_run &&
1071 perf_evsel__cmp(evsel, nth_evsel(T_TRANSACTION_START)) &&
1072 avg > 0 &&
1073 runtime_cycles_in_tx_stats[cpu].n != 0) {
1074 total = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
1075
1076 if (total)
1077 ratio = total / avg;
1078
1079 fprintf(output, " # %8.0f cycles / transaction ", ratio);
1080 } else if (transaction_run &&
1081 perf_evsel__cmp(evsel, nth_evsel(T_ELISION_START)) &&
1082 avg > 0 &&
1083 runtime_cycles_in_tx_stats[cpu].n != 0) {
1084 total = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
1085
1086 if (total)
1087 ratio = total / avg;
1088
1089 fprintf(output, " # %8.0f cycles / elision ", ratio);
1090 } else if (runtime_nsecs_stats[cpu].n != 0) {
1091 char unit = 'M';
1092
1093 total = avg_stats(&runtime_nsecs_stats[cpu]);
1094
1095 if (total)
1096 ratio = 1000.0 * avg / total;
1097 if (ratio < 0.001) {
1098 ratio *= 1000;
1099 unit = 'K';
1100 }
1101
1102 fprintf(output, " # %8.3f %c/sec ", ratio, unit);
1103 } else {
1104 fprintf(output, " ");
1105 }
1106 }
1107
1108 static void print_aggr(char *prefix)
1109 {
1110 struct perf_evsel *counter;
1111 int cpu, cpu2, s, s2, id, nr;
1112 double uval;
1113 u64 ena, run, val;
1114
1115 if (!(aggr_map || aggr_get_id))
1116 return;
1117
1118 for (s = 0; s < aggr_map->nr; s++) {
1119 id = aggr_map->map[s];
1120 evlist__for_each(evsel_list, counter) {
1121 val = ena = run = 0;
1122 nr = 0;
1123 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1124 cpu2 = perf_evsel__cpus(counter)->map[cpu];
1125 s2 = aggr_get_id(evsel_list->cpus, cpu2);
1126 if (s2 != id)
1127 continue;
1128 val += counter->counts->cpu[cpu].val;
1129 ena += counter->counts->cpu[cpu].ena;
1130 run += counter->counts->cpu[cpu].run;
1131 nr++;
1132 }
1133 if (prefix)
1134 fprintf(output, "%s", prefix);
1135
1136 if (run == 0 || ena == 0) {
1137 aggr_printout(counter, id, nr);
1138
1139 fprintf(output, "%*s%s",
1140 csv_output ? 0 : 18,
1141 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1142 csv_sep);
1143
1144 fprintf(output, "%-*s%s",
1145 csv_output ? 0 : unit_width,
1146 counter->unit, csv_sep);
1147
1148 fprintf(output, "%*s",
1149 csv_output ? 0 : -25,
1150 perf_evsel__name(counter));
1151
1152 if (counter->cgrp)
1153 fprintf(output, "%s%s",
1154 csv_sep, counter->cgrp->name);
1155
1156 fputc('\n', output);
1157 continue;
1158 }
1159 uval = val * counter->scale;
1160
1161 if (nsec_counter(counter))
1162 nsec_printout(id, nr, counter, uval);
1163 else
1164 abs_printout(id, nr, counter, uval);
1165
1166 if (!csv_output) {
1167 print_noise(counter, 1.0);
1168
1169 if (run != ena)
1170 fprintf(output, " (%.2f%%)",
1171 100.0 * run / ena);
1172 }
1173 fputc('\n', output);
1174 }
1175 }
1176 }
1177
1178 /*
1179 * Print out the results of a single counter:
1180 * aggregated counts in system-wide mode
1181 */
1182 static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
1183 {
1184 struct perf_stat *ps = counter->priv;
1185 double avg = avg_stats(&ps->res_stats[0]);
1186 int scaled = counter->counts->scaled;
1187 double uval;
1188
1189 if (prefix)
1190 fprintf(output, "%s", prefix);
1191
1192 if (scaled == -1) {
1193 fprintf(output, "%*s%s",
1194 csv_output ? 0 : 18,
1195 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1196 csv_sep);
1197 fprintf(output, "%-*s%s",
1198 csv_output ? 0 : unit_width,
1199 counter->unit, csv_sep);
1200 fprintf(output, "%*s",
1201 csv_output ? 0 : -25,
1202 perf_evsel__name(counter));
1203
1204 if (counter->cgrp)
1205 fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
1206
1207 fputc('\n', output);
1208 return;
1209 }
1210
1211 uval = avg * counter->scale;
1212
1213 if (nsec_counter(counter))
1214 nsec_printout(-1, 0, counter, uval);
1215 else
1216 abs_printout(-1, 0, counter, uval);
1217
1218 print_noise(counter, avg);
1219
1220 if (csv_output) {
1221 fputc('\n', output);
1222 return;
1223 }
1224
1225 if (scaled) {
1226 double avg_enabled, avg_running;
1227
1228 avg_enabled = avg_stats(&ps->res_stats[1]);
1229 avg_running = avg_stats(&ps->res_stats[2]);
1230
1231 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
1232 }
1233 fprintf(output, "\n");
1234 }
1235
1236 /*
1237 * Print out the results of a single counter:
1238 * does not use aggregated count in system-wide
1239 */
1240 static void print_counter(struct perf_evsel *counter, char *prefix)
1241 {
1242 u64 ena, run, val;
1243 double uval;
1244 int cpu;
1245
1246 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1247 val = counter->counts->cpu[cpu].val;
1248 ena = counter->counts->cpu[cpu].ena;
1249 run = counter->counts->cpu[cpu].run;
1250
1251 if (prefix)
1252 fprintf(output, "%s", prefix);
1253
1254 if (run == 0 || ena == 0) {
1255 fprintf(output, "CPU%*d%s%*s%s",
1256 csv_output ? 0 : -4,
1257 perf_evsel__cpus(counter)->map[cpu], csv_sep,
1258 csv_output ? 0 : 18,
1259 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1260 csv_sep);
1261
1262 fprintf(output, "%-*s%s",
1263 csv_output ? 0 : unit_width,
1264 counter->unit, csv_sep);
1265
1266 fprintf(output, "%*s",
1267 csv_output ? 0 : -25,
1268 perf_evsel__name(counter));
1269
1270 if (counter->cgrp)
1271 fprintf(output, "%s%s",
1272 csv_sep, counter->cgrp->name);
1273
1274 fputc('\n', output);
1275 continue;
1276 }
1277
1278 uval = val * counter->scale;
1279
1280 if (nsec_counter(counter))
1281 nsec_printout(cpu, 0, counter, uval);
1282 else
1283 abs_printout(cpu, 0, counter, uval);
1284
1285 if (!csv_output) {
1286 print_noise(counter, 1.0);
1287
1288 if (run != ena)
1289 fprintf(output, " (%.2f%%)",
1290 100.0 * run / ena);
1291 }
1292 fputc('\n', output);
1293 }
1294 }
1295
1296 static void print_stat(int argc, const char **argv)
1297 {
1298 struct perf_evsel *counter;
1299 int i;
1300
1301 fflush(stdout);
1302
1303 if (!csv_output) {
1304 fprintf(output, "\n");
1305 fprintf(output, " Performance counter stats for ");
1306 if (target.system_wide)
1307 fprintf(output, "\'system wide");
1308 else if (target.cpu_list)
1309 fprintf(output, "\'CPU(s) %s", target.cpu_list);
1310 else if (!target__has_task(&target)) {
1311 fprintf(output, "\'%s", argv[0]);
1312 for (i = 1; i < argc; i++)
1313 fprintf(output, " %s", argv[i]);
1314 } else if (target.pid)
1315 fprintf(output, "process id \'%s", target.pid);
1316 else
1317 fprintf(output, "thread id \'%s", target.tid);
1318
1319 fprintf(output, "\'");
1320 if (run_count > 1)
1321 fprintf(output, " (%d runs)", run_count);
1322 fprintf(output, ":\n\n");
1323 }
1324
1325 switch (aggr_mode) {
1326 case AGGR_CORE:
1327 case AGGR_SOCKET:
1328 print_aggr(NULL);
1329 break;
1330 case AGGR_GLOBAL:
1331 evlist__for_each(evsel_list, counter)
1332 print_counter_aggr(counter, NULL);
1333 break;
1334 case AGGR_NONE:
1335 evlist__for_each(evsel_list, counter)
1336 print_counter(counter, NULL);
1337 break;
1338 default:
1339 break;
1340 }
1341
1342 if (!csv_output) {
1343 if (!null_run)
1344 fprintf(output, "\n");
1345 fprintf(output, " %17.9f seconds time elapsed",
1346 avg_stats(&walltime_nsecs_stats)/1e9);
1347 if (run_count > 1) {
1348 fprintf(output, " ");
1349 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1350 avg_stats(&walltime_nsecs_stats));
1351 }
1352 fprintf(output, "\n\n");
1353 }
1354 }
1355
1356 static volatile int signr = -1;
1357
1358 static void skip_signal(int signo)
1359 {
1360 if ((child_pid == -1) || interval)
1361 done = 1;
1362
1363 signr = signo;
1364 /*
1365 * render child_pid harmless
1366 * won't send SIGTERM to a random
1367 * process in case of race condition
1368 * and fast PID recycling
1369 */
1370 child_pid = -1;
1371 }
1372
1373 static void sig_atexit(void)
1374 {
1375 sigset_t set, oset;
1376
1377 /*
1378 * avoid race condition with SIGCHLD handler
1379 * in skip_signal() which is modifying child_pid
1380 * goal is to avoid send SIGTERM to a random
1381 * process
1382 */
1383 sigemptyset(&set);
1384 sigaddset(&set, SIGCHLD);
1385 sigprocmask(SIG_BLOCK, &set, &oset);
1386
1387 if (child_pid != -1)
1388 kill(child_pid, SIGTERM);
1389
1390 sigprocmask(SIG_SETMASK, &oset, NULL);
1391
1392 if (signr == -1)
1393 return;
1394
1395 signal(signr, SIG_DFL);
1396 kill(getpid(), signr);
1397 }
1398
1399 static int stat__set_big_num(const struct option *opt __maybe_unused,
1400 const char *s __maybe_unused, int unset)
1401 {
1402 big_num_opt = unset ? 0 : 1;
1403 return 0;
1404 }
1405
1406 static int perf_stat_init_aggr_mode(void)
1407 {
1408 switch (aggr_mode) {
1409 case AGGR_SOCKET:
1410 if (cpu_map__build_socket_map(evsel_list->cpus, &aggr_map)) {
1411 perror("cannot build socket map");
1412 return -1;
1413 }
1414 aggr_get_id = cpu_map__get_socket;
1415 break;
1416 case AGGR_CORE:
1417 if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
1418 perror("cannot build core map");
1419 return -1;
1420 }
1421 aggr_get_id = cpu_map__get_core;
1422 break;
1423 case AGGR_NONE:
1424 case AGGR_GLOBAL:
1425 default:
1426 break;
1427 }
1428 return 0;
1429 }
1430
1431 static int setup_events(const char * const *attrs, unsigned len)
1432 {
1433 unsigned i;
1434
1435 for (i = 0; i < len; i++) {
1436 if (parse_events(evsel_list, attrs[i]))
1437 return -1;
1438 }
1439 return 0;
1440 }
1441
1442 /*
1443 * Add default attributes, if there were no attributes specified or
1444 * if -d/--detailed, -d -d or -d -d -d is used:
1445 */
1446 static int add_default_attributes(void)
1447 {
1448 struct perf_event_attr default_attrs[] = {
1449
1450 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
1451 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
1452 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
1453 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
1454
1455 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
1456 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1457 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
1458 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
1459 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
1460 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
1461
1462 };
1463
1464 /*
1465 * Detailed stats (-d), covering the L1 and last level data caches:
1466 */
1467 struct perf_event_attr detailed_attrs[] = {
1468
1469 { .type = PERF_TYPE_HW_CACHE,
1470 .config =
1471 PERF_COUNT_HW_CACHE_L1D << 0 |
1472 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1473 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1474
1475 { .type = PERF_TYPE_HW_CACHE,
1476 .config =
1477 PERF_COUNT_HW_CACHE_L1D << 0 |
1478 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1479 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1480
1481 { .type = PERF_TYPE_HW_CACHE,
1482 .config =
1483 PERF_COUNT_HW_CACHE_LL << 0 |
1484 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1485 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1486
1487 { .type = PERF_TYPE_HW_CACHE,
1488 .config =
1489 PERF_COUNT_HW_CACHE_LL << 0 |
1490 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1491 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1492 };
1493
1494 /*
1495 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1496 */
1497 struct perf_event_attr very_detailed_attrs[] = {
1498
1499 { .type = PERF_TYPE_HW_CACHE,
1500 .config =
1501 PERF_COUNT_HW_CACHE_L1I << 0 |
1502 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1503 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1504
1505 { .type = PERF_TYPE_HW_CACHE,
1506 .config =
1507 PERF_COUNT_HW_CACHE_L1I << 0 |
1508 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1509 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1510
1511 { .type = PERF_TYPE_HW_CACHE,
1512 .config =
1513 PERF_COUNT_HW_CACHE_DTLB << 0 |
1514 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1515 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1516
1517 { .type = PERF_TYPE_HW_CACHE,
1518 .config =
1519 PERF_COUNT_HW_CACHE_DTLB << 0 |
1520 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1521 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1522
1523 { .type = PERF_TYPE_HW_CACHE,
1524 .config =
1525 PERF_COUNT_HW_CACHE_ITLB << 0 |
1526 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1527 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1528
1529 { .type = PERF_TYPE_HW_CACHE,
1530 .config =
1531 PERF_COUNT_HW_CACHE_ITLB << 0 |
1532 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1533 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1534
1535 };
1536
1537 /*
1538 * Very, very detailed stats (-d -d -d), adding prefetch events:
1539 */
1540 struct perf_event_attr very_very_detailed_attrs[] = {
1541
1542 { .type = PERF_TYPE_HW_CACHE,
1543 .config =
1544 PERF_COUNT_HW_CACHE_L1D << 0 |
1545 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1546 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1547
1548 { .type = PERF_TYPE_HW_CACHE,
1549 .config =
1550 PERF_COUNT_HW_CACHE_L1D << 0 |
1551 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1552 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1553 };
1554
1555 /* Set attrs if no event is selected and !null_run: */
1556 if (null_run)
1557 return 0;
1558
1559 if (transaction_run) {
1560 int err;
1561 if (pmu_have_event("cpu", "cycles-ct") &&
1562 pmu_have_event("cpu", "el-start"))
1563 err = setup_events(transaction_attrs,
1564 ARRAY_SIZE(transaction_attrs));
1565 else
1566 err = setup_events(transaction_limited_attrs,
1567 ARRAY_SIZE(transaction_limited_attrs));
1568 if (err < 0) {
1569 fprintf(stderr, "Cannot set up transaction events\n");
1570 return -1;
1571 }
1572 return 0;
1573 }
1574
1575 if (!evsel_list->nr_entries) {
1576 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1577 return -1;
1578 }
1579
1580 /* Detailed events get appended to the event list: */
1581
1582 if (detailed_run < 1)
1583 return 0;
1584
1585 /* Append detailed run extra attributes: */
1586 if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1587 return -1;
1588
1589 if (detailed_run < 2)
1590 return 0;
1591
1592 /* Append very detailed run extra attributes: */
1593 if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1594 return -1;
1595
1596 if (detailed_run < 3)
1597 return 0;
1598
1599 /* Append very, very detailed run extra attributes: */
1600 return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1601 }
1602
1603 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
1604 {
1605 bool append_file = false;
1606 int output_fd = 0;
1607 const char *output_name = NULL;
1608 const struct option options[] = {
1609 OPT_BOOLEAN('T', "transaction", &transaction_run,
1610 "hardware transaction statistics"),
1611 OPT_CALLBACK('e', "event", &evsel_list, "event",
1612 "event selector. use 'perf list' to list available events",
1613 parse_events_option),
1614 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1615 "event filter", parse_filter),
1616 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1617 "child tasks do not inherit counters"),
1618 OPT_STRING('p', "pid", &target.pid, "pid",
1619 "stat events on existing process id"),
1620 OPT_STRING('t', "tid", &target.tid, "tid",
1621 "stat events on existing thread id"),
1622 OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1623 "system-wide collection from all CPUs"),
1624 OPT_BOOLEAN('g', "group", &group,
1625 "put the counters into a counter group"),
1626 OPT_BOOLEAN('c', "scale", &scale, "scale/normalize counters"),
1627 OPT_INCR('v', "verbose", &verbose,
1628 "be more verbose (show counter open errors, etc)"),
1629 OPT_INTEGER('r', "repeat", &run_count,
1630 "repeat command and print average + stddev (max: 100, forever: 0)"),
1631 OPT_BOOLEAN('n', "null", &null_run,
1632 "null run - dont start any counters"),
1633 OPT_INCR('d', "detailed", &detailed_run,
1634 "detailed run - start a lot of events"),
1635 OPT_BOOLEAN('S', "sync", &sync_run,
1636 "call sync() before starting a run"),
1637 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1638 "print large numbers with thousands\' separators",
1639 stat__set_big_num),
1640 OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1641 "list of cpus to monitor in system-wide"),
1642 OPT_SET_UINT('A', "no-aggr", &aggr_mode,
1643 "disable CPU count aggregation", AGGR_NONE),
1644 OPT_STRING('x', "field-separator", &csv_sep, "separator",
1645 "print counts with custom separator"),
1646 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1647 "monitor event in cgroup name only", parse_cgroups),
1648 OPT_STRING('o', "output", &output_name, "file", "output file name"),
1649 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1650 OPT_INTEGER(0, "log-fd", &output_fd,
1651 "log output to fd, instead of stderr"),
1652 OPT_STRING(0, "pre", &pre_cmd, "command",
1653 "command to run prior to the measured command"),
1654 OPT_STRING(0, "post", &post_cmd, "command",
1655 "command to run after to the measured command"),
1656 OPT_UINTEGER('I', "interval-print", &interval,
1657 "print counts at regular interval in ms (>= 100)"),
1658 OPT_SET_UINT(0, "per-socket", &aggr_mode,
1659 "aggregate counts per processor socket", AGGR_SOCKET),
1660 OPT_SET_UINT(0, "per-core", &aggr_mode,
1661 "aggregate counts per physical processor core", AGGR_CORE),
1662 OPT_UINTEGER('D', "delay", &initial_delay,
1663 "ms to wait before starting measurement after program start"),
1664 OPT_END()
1665 };
1666 const char * const stat_usage[] = {
1667 "perf stat [<options>] [<command>]",
1668 NULL
1669 };
1670 int status = -EINVAL, run_idx;
1671 const char *mode;
1672
1673 setlocale(LC_ALL, "");
1674
1675 evsel_list = perf_evlist__new();
1676 if (evsel_list == NULL)
1677 return -ENOMEM;
1678
1679 argc = parse_options(argc, argv, options, stat_usage,
1680 PARSE_OPT_STOP_AT_NON_OPTION);
1681
1682 output = stderr;
1683 if (output_name && strcmp(output_name, "-"))
1684 output = NULL;
1685
1686 if (output_name && output_fd) {
1687 fprintf(stderr, "cannot use both --output and --log-fd\n");
1688 parse_options_usage(stat_usage, options, "o", 1);
1689 parse_options_usage(NULL, options, "log-fd", 0);
1690 goto out;
1691 }
1692
1693 if (output_fd < 0) {
1694 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1695 parse_options_usage(stat_usage, options, "log-fd", 0);
1696 goto out;
1697 }
1698
1699 if (!output) {
1700 struct timespec tm;
1701 mode = append_file ? "a" : "w";
1702
1703 output = fopen(output_name, mode);
1704 if (!output) {
1705 perror("failed to create output file");
1706 return -1;
1707 }
1708 clock_gettime(CLOCK_REALTIME, &tm);
1709 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1710 } else if (output_fd > 0) {
1711 mode = append_file ? "a" : "w";
1712 output = fdopen(output_fd, mode);
1713 if (!output) {
1714 perror("Failed opening logfd");
1715 return -errno;
1716 }
1717 }
1718
1719 if (csv_sep) {
1720 csv_output = true;
1721 if (!strcmp(csv_sep, "\\t"))
1722 csv_sep = "\t";
1723 } else
1724 csv_sep = DEFAULT_SEPARATOR;
1725
1726 /*
1727 * let the spreadsheet do the pretty-printing
1728 */
1729 if (csv_output) {
1730 /* User explicitly passed -B? */
1731 if (big_num_opt == 1) {
1732 fprintf(stderr, "-B option not supported with -x\n");
1733 parse_options_usage(stat_usage, options, "B", 1);
1734 parse_options_usage(NULL, options, "x", 1);
1735 goto out;
1736 } else /* Nope, so disable big number formatting */
1737 big_num = false;
1738 } else if (big_num_opt == 0) /* User passed --no-big-num */
1739 big_num = false;
1740
1741 if (!argc && target__none(&target))
1742 usage_with_options(stat_usage, options);
1743
1744 if (run_count < 0) {
1745 pr_err("Run count must be a positive number\n");
1746 parse_options_usage(stat_usage, options, "r", 1);
1747 goto out;
1748 } else if (run_count == 0) {
1749 forever = true;
1750 run_count = 1;
1751 }
1752
1753 /* no_aggr, cgroup are for system-wide only */
1754 if ((aggr_mode != AGGR_GLOBAL || nr_cgroups) &&
1755 !target__has_cpu(&target)) {
1756 fprintf(stderr, "both cgroup and no-aggregation "
1757 "modes only available in system-wide mode\n");
1758
1759 parse_options_usage(stat_usage, options, "G", 1);
1760 parse_options_usage(NULL, options, "A", 1);
1761 parse_options_usage(NULL, options, "a", 1);
1762 goto out;
1763 }
1764
1765 if (add_default_attributes())
1766 goto out;
1767
1768 target__validate(&target);
1769
1770 if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1771 if (target__has_task(&target)) {
1772 pr_err("Problems finding threads of monitor\n");
1773 parse_options_usage(stat_usage, options, "p", 1);
1774 parse_options_usage(NULL, options, "t", 1);
1775 } else if (target__has_cpu(&target)) {
1776 perror("failed to parse CPUs map");
1777 parse_options_usage(stat_usage, options, "C", 1);
1778 parse_options_usage(NULL, options, "a", 1);
1779 }
1780 goto out;
1781 }
1782 if (interval && interval < 100) {
1783 pr_err("print interval must be >= 100ms\n");
1784 parse_options_usage(stat_usage, options, "I", 1);
1785 goto out;
1786 }
1787
1788 if (perf_evlist__alloc_stats(evsel_list, interval))
1789 goto out;
1790
1791 if (perf_stat_init_aggr_mode())
1792 goto out;
1793
1794 /*
1795 * We dont want to block the signals - that would cause
1796 * child tasks to inherit that and Ctrl-C would not work.
1797 * What we want is for Ctrl-C to work in the exec()-ed
1798 * task, but being ignored by perf stat itself:
1799 */
1800 atexit(sig_atexit);
1801 if (!forever)
1802 signal(SIGINT, skip_signal);
1803 signal(SIGCHLD, skip_signal);
1804 signal(SIGALRM, skip_signal);
1805 signal(SIGABRT, skip_signal);
1806
1807 status = 0;
1808 for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
1809 if (run_count != 1 && verbose)
1810 fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1811 run_idx + 1);
1812
1813 status = run_perf_stat(argc, argv);
1814 if (forever && status != -1) {
1815 print_stat(argc, argv);
1816 perf_stat__reset_stats(evsel_list);
1817 }
1818 }
1819
1820 if (!forever && status != -1 && !interval)
1821 print_stat(argc, argv);
1822
1823 perf_evlist__free_stats(evsel_list);
1824 out:
1825 perf_evlist__delete(evsel_list);
1826 return status;
1827 }
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