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lkdtm: split usercopy tests to separate file
[deliverable/linux.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/cgroup.h"
47 #include "util/util.h"
48 #include <subcmd/parse-options.h>
49 #include "util/parse-events.h"
50 #include "util/pmu.h"
51 #include "util/event.h"
52 #include "util/evlist.h"
53 #include "util/evsel.h"
54 #include "util/debug.h"
55 #include "util/color.h"
56 #include "util/stat.h"
57 #include "util/header.h"
58 #include "util/cpumap.h"
59 #include "util/thread.h"
60 #include "util/thread_map.h"
61 #include "util/counts.h"
62 #include "util/session.h"
63 #include "util/tool.h"
64 #include "asm/bug.h"
65
66 #include <stdlib.h>
67 #include <sys/prctl.h>
68 #include <locale.h>
69 #include <math.h>
70
71 #define DEFAULT_SEPARATOR " "
72 #define CNTR_NOT_SUPPORTED "<not supported>"
73 #define CNTR_NOT_COUNTED "<not counted>"
74
75 static void print_counters(struct timespec *ts, int argc, const char **argv);
76
77 /* Default events used for perf stat -T */
78 static const char *transaction_attrs = {
79 "task-clock,"
80 "{"
81 "instructions,"
82 "cycles,"
83 "cpu/cycles-t/,"
84 "cpu/tx-start/,"
85 "cpu/el-start/,"
86 "cpu/cycles-ct/"
87 "}"
88 };
89
90 /* More limited version when the CPU does not have all events. */
91 static const char * transaction_limited_attrs = {
92 "task-clock,"
93 "{"
94 "instructions,"
95 "cycles,"
96 "cpu/cycles-t/,"
97 "cpu/tx-start/"
98 "}"
99 };
100
101 static struct perf_evlist *evsel_list;
102
103 static struct target target = {
104 .uid = UINT_MAX,
105 };
106
107 typedef int (*aggr_get_id_t)(struct cpu_map *m, int cpu);
108
109 static int run_count = 1;
110 static bool no_inherit = false;
111 static volatile pid_t child_pid = -1;
112 static bool null_run = false;
113 static int detailed_run = 0;
114 static bool transaction_run;
115 static bool big_num = true;
116 static int big_num_opt = -1;
117 static const char *csv_sep = NULL;
118 static bool csv_output = false;
119 static bool group = false;
120 static const char *pre_cmd = NULL;
121 static const char *post_cmd = NULL;
122 static bool sync_run = false;
123 static unsigned int initial_delay = 0;
124 static unsigned int unit_width = 4; /* strlen("unit") */
125 static bool forever = false;
126 static bool metric_only = false;
127 static struct timespec ref_time;
128 static struct cpu_map *aggr_map;
129 static aggr_get_id_t aggr_get_id;
130 static bool append_file;
131 static const char *output_name;
132 static int output_fd;
133
134 struct perf_stat {
135 bool record;
136 struct perf_data_file file;
137 struct perf_session *session;
138 u64 bytes_written;
139 struct perf_tool tool;
140 bool maps_allocated;
141 struct cpu_map *cpus;
142 struct thread_map *threads;
143 enum aggr_mode aggr_mode;
144 };
145
146 static struct perf_stat perf_stat;
147 #define STAT_RECORD perf_stat.record
148
149 static volatile int done = 0;
150
151 static struct perf_stat_config stat_config = {
152 .aggr_mode = AGGR_GLOBAL,
153 .scale = true,
154 };
155
156 static inline void diff_timespec(struct timespec *r, struct timespec *a,
157 struct timespec *b)
158 {
159 r->tv_sec = a->tv_sec - b->tv_sec;
160 if (a->tv_nsec < b->tv_nsec) {
161 r->tv_nsec = a->tv_nsec + 1000000000L - b->tv_nsec;
162 r->tv_sec--;
163 } else {
164 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
165 }
166 }
167
168 static void perf_stat__reset_stats(void)
169 {
170 perf_evlist__reset_stats(evsel_list);
171 perf_stat__reset_shadow_stats();
172 }
173
174 static int create_perf_stat_counter(struct perf_evsel *evsel)
175 {
176 struct perf_event_attr *attr = &evsel->attr;
177
178 if (stat_config.scale)
179 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
180 PERF_FORMAT_TOTAL_TIME_RUNNING;
181
182 attr->inherit = !no_inherit;
183
184 /*
185 * Some events get initialized with sample_(period/type) set,
186 * like tracepoints. Clear it up for counting.
187 */
188 attr->sample_period = 0;
189
190 /*
191 * But set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
192 * while avoiding that older tools show confusing messages.
193 *
194 * However for pipe sessions we need to keep it zero,
195 * because script's perf_evsel__check_attr is triggered
196 * by attr->sample_type != 0, and we can't run it on
197 * stat sessions.
198 */
199 if (!(STAT_RECORD && perf_stat.file.is_pipe))
200 attr->sample_type = PERF_SAMPLE_IDENTIFIER;
201
202 /*
203 * Disabling all counters initially, they will be enabled
204 * either manually by us or by kernel via enable_on_exec
205 * set later.
206 */
207 if (perf_evsel__is_group_leader(evsel)) {
208 attr->disabled = 1;
209
210 /*
211 * In case of initial_delay we enable tracee
212 * events manually.
213 */
214 if (target__none(&target) && !initial_delay)
215 attr->enable_on_exec = 1;
216 }
217
218 if (target__has_cpu(&target))
219 return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
220
221 return perf_evsel__open_per_thread(evsel, evsel_list->threads);
222 }
223
224 /*
225 * Does the counter have nsecs as a unit?
226 */
227 static inline int nsec_counter(struct perf_evsel *evsel)
228 {
229 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
230 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
231 return 1;
232
233 return 0;
234 }
235
236 static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
237 union perf_event *event,
238 struct perf_sample *sample __maybe_unused,
239 struct machine *machine __maybe_unused)
240 {
241 if (perf_data_file__write(&perf_stat.file, event, event->header.size) < 0) {
242 pr_err("failed to write perf data, error: %m\n");
243 return -1;
244 }
245
246 perf_stat.bytes_written += event->header.size;
247 return 0;
248 }
249
250 static int write_stat_round_event(u64 tm, u64 type)
251 {
252 return perf_event__synthesize_stat_round(NULL, tm, type,
253 process_synthesized_event,
254 NULL);
255 }
256
257 #define WRITE_STAT_ROUND_EVENT(time, interval) \
258 write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
259
260 #define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
261
262 static int
263 perf_evsel__write_stat_event(struct perf_evsel *counter, u32 cpu, u32 thread,
264 struct perf_counts_values *count)
265 {
266 struct perf_sample_id *sid = SID(counter, cpu, thread);
267
268 return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
269 process_synthesized_event, NULL);
270 }
271
272 /*
273 * Read out the results of a single counter:
274 * do not aggregate counts across CPUs in system-wide mode
275 */
276 static int read_counter(struct perf_evsel *counter)
277 {
278 int nthreads = thread_map__nr(evsel_list->threads);
279 int ncpus = perf_evsel__nr_cpus(counter);
280 int cpu, thread;
281
282 if (!counter->supported)
283 return -ENOENT;
284
285 if (counter->system_wide)
286 nthreads = 1;
287
288 for (thread = 0; thread < nthreads; thread++) {
289 for (cpu = 0; cpu < ncpus; cpu++) {
290 struct perf_counts_values *count;
291
292 count = perf_counts(counter->counts, cpu, thread);
293 if (perf_evsel__read(counter, cpu, thread, count))
294 return -1;
295
296 if (STAT_RECORD) {
297 if (perf_evsel__write_stat_event(counter, cpu, thread, count)) {
298 pr_err("failed to write stat event\n");
299 return -1;
300 }
301 }
302
303 if (verbose > 1) {
304 fprintf(stat_config.output,
305 "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
306 perf_evsel__name(counter),
307 cpu,
308 count->val, count->ena, count->run);
309 }
310 }
311 }
312
313 return 0;
314 }
315
316 static void read_counters(bool close_counters)
317 {
318 struct perf_evsel *counter;
319
320 evlist__for_each(evsel_list, counter) {
321 if (read_counter(counter))
322 pr_debug("failed to read counter %s\n", counter->name);
323
324 if (perf_stat_process_counter(&stat_config, counter))
325 pr_warning("failed to process counter %s\n", counter->name);
326
327 if (close_counters) {
328 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
329 thread_map__nr(evsel_list->threads));
330 }
331 }
332 }
333
334 static void process_interval(void)
335 {
336 struct timespec ts, rs;
337
338 read_counters(false);
339
340 clock_gettime(CLOCK_MONOTONIC, &ts);
341 diff_timespec(&rs, &ts, &ref_time);
342
343 if (STAT_RECORD) {
344 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSECS_PER_SEC + rs.tv_nsec, INTERVAL))
345 pr_err("failed to write stat round event\n");
346 }
347
348 print_counters(&rs, 0, NULL);
349 }
350
351 static void enable_counters(void)
352 {
353 if (initial_delay)
354 usleep(initial_delay * 1000);
355
356 /*
357 * We need to enable counters only if:
358 * - we don't have tracee (attaching to task or cpu)
359 * - we have initial delay configured
360 */
361 if (!target__none(&target) || initial_delay)
362 perf_evlist__enable(evsel_list);
363 }
364
365 static volatile int workload_exec_errno;
366
367 /*
368 * perf_evlist__prepare_workload will send a SIGUSR1
369 * if the fork fails, since we asked by setting its
370 * want_signal to true.
371 */
372 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
373 void *ucontext __maybe_unused)
374 {
375 workload_exec_errno = info->si_value.sival_int;
376 }
377
378 static bool has_unit(struct perf_evsel *counter)
379 {
380 return counter->unit && *counter->unit;
381 }
382
383 static bool has_scale(struct perf_evsel *counter)
384 {
385 return counter->scale != 1;
386 }
387
388 static int perf_stat_synthesize_config(bool is_pipe)
389 {
390 struct perf_evsel *counter;
391 int err;
392
393 if (is_pipe) {
394 err = perf_event__synthesize_attrs(NULL, perf_stat.session,
395 process_synthesized_event);
396 if (err < 0) {
397 pr_err("Couldn't synthesize attrs.\n");
398 return err;
399 }
400 }
401
402 /*
403 * Synthesize other events stuff not carried within
404 * attr event - unit, scale, name
405 */
406 evlist__for_each(evsel_list, counter) {
407 if (!counter->supported)
408 continue;
409
410 /*
411 * Synthesize unit and scale only if it's defined.
412 */
413 if (has_unit(counter)) {
414 err = perf_event__synthesize_event_update_unit(NULL, counter, process_synthesized_event);
415 if (err < 0) {
416 pr_err("Couldn't synthesize evsel unit.\n");
417 return err;
418 }
419 }
420
421 if (has_scale(counter)) {
422 err = perf_event__synthesize_event_update_scale(NULL, counter, process_synthesized_event);
423 if (err < 0) {
424 pr_err("Couldn't synthesize evsel scale.\n");
425 return err;
426 }
427 }
428
429 if (counter->own_cpus) {
430 err = perf_event__synthesize_event_update_cpus(NULL, counter, process_synthesized_event);
431 if (err < 0) {
432 pr_err("Couldn't synthesize evsel scale.\n");
433 return err;
434 }
435 }
436
437 /*
438 * Name is needed only for pipe output,
439 * perf.data carries event names.
440 */
441 if (is_pipe) {
442 err = perf_event__synthesize_event_update_name(NULL, counter, process_synthesized_event);
443 if (err < 0) {
444 pr_err("Couldn't synthesize evsel name.\n");
445 return err;
446 }
447 }
448 }
449
450 err = perf_event__synthesize_thread_map2(NULL, evsel_list->threads,
451 process_synthesized_event,
452 NULL);
453 if (err < 0) {
454 pr_err("Couldn't synthesize thread map.\n");
455 return err;
456 }
457
458 err = perf_event__synthesize_cpu_map(NULL, evsel_list->cpus,
459 process_synthesized_event, NULL);
460 if (err < 0) {
461 pr_err("Couldn't synthesize thread map.\n");
462 return err;
463 }
464
465 err = perf_event__synthesize_stat_config(NULL, &stat_config,
466 process_synthesized_event, NULL);
467 if (err < 0) {
468 pr_err("Couldn't synthesize config.\n");
469 return err;
470 }
471
472 return 0;
473 }
474
475 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
476
477 static int __store_counter_ids(struct perf_evsel *counter,
478 struct cpu_map *cpus,
479 struct thread_map *threads)
480 {
481 int cpu, thread;
482
483 for (cpu = 0; cpu < cpus->nr; cpu++) {
484 for (thread = 0; thread < threads->nr; thread++) {
485 int fd = FD(counter, cpu, thread);
486
487 if (perf_evlist__id_add_fd(evsel_list, counter,
488 cpu, thread, fd) < 0)
489 return -1;
490 }
491 }
492
493 return 0;
494 }
495
496 static int store_counter_ids(struct perf_evsel *counter)
497 {
498 struct cpu_map *cpus = counter->cpus;
499 struct thread_map *threads = counter->threads;
500
501 if (perf_evsel__alloc_id(counter, cpus->nr, threads->nr))
502 return -ENOMEM;
503
504 return __store_counter_ids(counter, cpus, threads);
505 }
506
507 static int __run_perf_stat(int argc, const char **argv)
508 {
509 int interval = stat_config.interval;
510 char msg[512];
511 unsigned long long t0, t1;
512 struct perf_evsel *counter;
513 struct timespec ts;
514 size_t l;
515 int status = 0;
516 const bool forks = (argc > 0);
517 bool is_pipe = STAT_RECORD ? perf_stat.file.is_pipe : false;
518
519 if (interval) {
520 ts.tv_sec = interval / 1000;
521 ts.tv_nsec = (interval % 1000) * 1000000;
522 } else {
523 ts.tv_sec = 1;
524 ts.tv_nsec = 0;
525 }
526
527 if (forks) {
528 if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe,
529 workload_exec_failed_signal) < 0) {
530 perror("failed to prepare workload");
531 return -1;
532 }
533 child_pid = evsel_list->workload.pid;
534 }
535
536 if (group)
537 perf_evlist__set_leader(evsel_list);
538
539 evlist__for_each(evsel_list, counter) {
540 try_again:
541 if (create_perf_stat_counter(counter) < 0) {
542 /*
543 * PPC returns ENXIO for HW counters until 2.6.37
544 * (behavior changed with commit b0a873e).
545 */
546 if (errno == EINVAL || errno == ENOSYS ||
547 errno == ENOENT || errno == EOPNOTSUPP ||
548 errno == ENXIO) {
549 if (verbose)
550 ui__warning("%s event is not supported by the kernel.\n",
551 perf_evsel__name(counter));
552 counter->supported = false;
553
554 if ((counter->leader != counter) ||
555 !(counter->leader->nr_members > 1))
556 continue;
557 } else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
558 if (verbose)
559 ui__warning("%s\n", msg);
560 goto try_again;
561 }
562
563 perf_evsel__open_strerror(counter, &target,
564 errno, msg, sizeof(msg));
565 ui__error("%s\n", msg);
566
567 if (child_pid != -1)
568 kill(child_pid, SIGTERM);
569
570 return -1;
571 }
572 counter->supported = true;
573
574 l = strlen(counter->unit);
575 if (l > unit_width)
576 unit_width = l;
577
578 if (STAT_RECORD && store_counter_ids(counter))
579 return -1;
580 }
581
582 if (perf_evlist__apply_filters(evsel_list, &counter)) {
583 error("failed to set filter \"%s\" on event %s with %d (%s)\n",
584 counter->filter, perf_evsel__name(counter), errno,
585 strerror_r(errno, msg, sizeof(msg)));
586 return -1;
587 }
588
589 if (STAT_RECORD) {
590 int err, fd = perf_data_file__fd(&perf_stat.file);
591
592 if (is_pipe) {
593 err = perf_header__write_pipe(perf_data_file__fd(&perf_stat.file));
594 } else {
595 err = perf_session__write_header(perf_stat.session, evsel_list,
596 fd, false);
597 }
598
599 if (err < 0)
600 return err;
601
602 err = perf_stat_synthesize_config(is_pipe);
603 if (err < 0)
604 return err;
605 }
606
607 /*
608 * Enable counters and exec the command:
609 */
610 t0 = rdclock();
611 clock_gettime(CLOCK_MONOTONIC, &ref_time);
612
613 if (forks) {
614 perf_evlist__start_workload(evsel_list);
615 enable_counters();
616
617 if (interval) {
618 while (!waitpid(child_pid, &status, WNOHANG)) {
619 nanosleep(&ts, NULL);
620 process_interval();
621 }
622 }
623 wait(&status);
624
625 if (workload_exec_errno) {
626 const char *emsg = strerror_r(workload_exec_errno, msg, sizeof(msg));
627 pr_err("Workload failed: %s\n", emsg);
628 return -1;
629 }
630
631 if (WIFSIGNALED(status))
632 psignal(WTERMSIG(status), argv[0]);
633 } else {
634 enable_counters();
635 while (!done) {
636 nanosleep(&ts, NULL);
637 if (interval)
638 process_interval();
639 }
640 }
641
642 t1 = rdclock();
643
644 update_stats(&walltime_nsecs_stats, t1 - t0);
645
646 read_counters(true);
647
648 return WEXITSTATUS(status);
649 }
650
651 static int run_perf_stat(int argc, const char **argv)
652 {
653 int ret;
654
655 if (pre_cmd) {
656 ret = system(pre_cmd);
657 if (ret)
658 return ret;
659 }
660
661 if (sync_run)
662 sync();
663
664 ret = __run_perf_stat(argc, argv);
665 if (ret)
666 return ret;
667
668 if (post_cmd) {
669 ret = system(post_cmd);
670 if (ret)
671 return ret;
672 }
673
674 return ret;
675 }
676
677 static void print_running(u64 run, u64 ena)
678 {
679 if (csv_output) {
680 fprintf(stat_config.output, "%s%" PRIu64 "%s%.2f",
681 csv_sep,
682 run,
683 csv_sep,
684 ena ? 100.0 * run / ena : 100.0);
685 } else if (run != ena) {
686 fprintf(stat_config.output, " (%.2f%%)", 100.0 * run / ena);
687 }
688 }
689
690 static void print_noise_pct(double total, double avg)
691 {
692 double pct = rel_stddev_stats(total, avg);
693
694 if (csv_output)
695 fprintf(stat_config.output, "%s%.2f%%", csv_sep, pct);
696 else if (pct)
697 fprintf(stat_config.output, " ( +-%6.2f%% )", pct);
698 }
699
700 static void print_noise(struct perf_evsel *evsel, double avg)
701 {
702 struct perf_stat_evsel *ps;
703
704 if (run_count == 1)
705 return;
706
707 ps = evsel->priv;
708 print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
709 }
710
711 static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
712 {
713 switch (stat_config.aggr_mode) {
714 case AGGR_CORE:
715 fprintf(stat_config.output, "S%d-C%*d%s%*d%s",
716 cpu_map__id_to_socket(id),
717 csv_output ? 0 : -8,
718 cpu_map__id_to_cpu(id),
719 csv_sep,
720 csv_output ? 0 : 4,
721 nr,
722 csv_sep);
723 break;
724 case AGGR_SOCKET:
725 fprintf(stat_config.output, "S%*d%s%*d%s",
726 csv_output ? 0 : -5,
727 id,
728 csv_sep,
729 csv_output ? 0 : 4,
730 nr,
731 csv_sep);
732 break;
733 case AGGR_NONE:
734 fprintf(stat_config.output, "CPU%*d%s",
735 csv_output ? 0 : -4,
736 perf_evsel__cpus(evsel)->map[id], csv_sep);
737 break;
738 case AGGR_THREAD:
739 fprintf(stat_config.output, "%*s-%*d%s",
740 csv_output ? 0 : 16,
741 thread_map__comm(evsel->threads, id),
742 csv_output ? 0 : -8,
743 thread_map__pid(evsel->threads, id),
744 csv_sep);
745 break;
746 case AGGR_GLOBAL:
747 case AGGR_UNSET:
748 default:
749 break;
750 }
751 }
752
753 struct outstate {
754 FILE *fh;
755 bool newline;
756 const char *prefix;
757 int nfields;
758 int id, nr;
759 struct perf_evsel *evsel;
760 };
761
762 #define METRIC_LEN 35
763
764 static void new_line_std(void *ctx)
765 {
766 struct outstate *os = ctx;
767
768 os->newline = true;
769 }
770
771 static void do_new_line_std(struct outstate *os)
772 {
773 fputc('\n', os->fh);
774 fputs(os->prefix, os->fh);
775 aggr_printout(os->evsel, os->id, os->nr);
776 if (stat_config.aggr_mode == AGGR_NONE)
777 fprintf(os->fh, " ");
778 fprintf(os->fh, " ");
779 }
780
781 static void print_metric_std(void *ctx, const char *color, const char *fmt,
782 const char *unit, double val)
783 {
784 struct outstate *os = ctx;
785 FILE *out = os->fh;
786 int n;
787 bool newline = os->newline;
788
789 os->newline = false;
790
791 if (unit == NULL || fmt == NULL) {
792 fprintf(out, "%-*s", METRIC_LEN, "");
793 return;
794 }
795
796 if (newline)
797 do_new_line_std(os);
798
799 n = fprintf(out, " # ");
800 if (color)
801 n += color_fprintf(out, color, fmt, val);
802 else
803 n += fprintf(out, fmt, val);
804 fprintf(out, " %-*s", METRIC_LEN - n - 1, unit);
805 }
806
807 static void new_line_csv(void *ctx)
808 {
809 struct outstate *os = ctx;
810 int i;
811
812 fputc('\n', os->fh);
813 if (os->prefix)
814 fprintf(os->fh, "%s%s", os->prefix, csv_sep);
815 aggr_printout(os->evsel, os->id, os->nr);
816 for (i = 0; i < os->nfields; i++)
817 fputs(csv_sep, os->fh);
818 }
819
820 static void print_metric_csv(void *ctx,
821 const char *color __maybe_unused,
822 const char *fmt, const char *unit, double val)
823 {
824 struct outstate *os = ctx;
825 FILE *out = os->fh;
826 char buf[64], *vals, *ends;
827
828 if (unit == NULL || fmt == NULL) {
829 fprintf(out, "%s%s%s%s", csv_sep, csv_sep, csv_sep, csv_sep);
830 return;
831 }
832 snprintf(buf, sizeof(buf), fmt, val);
833 vals = buf;
834 while (isspace(*vals))
835 vals++;
836 ends = vals;
837 while (isdigit(*ends) || *ends == '.')
838 ends++;
839 *ends = 0;
840 while (isspace(*unit))
841 unit++;
842 fprintf(out, "%s%s%s%s", csv_sep, vals, csv_sep, unit);
843 }
844
845 #define METRIC_ONLY_LEN 20
846
847 /* Filter out some columns that don't work well in metrics only mode */
848
849 static bool valid_only_metric(const char *unit)
850 {
851 if (!unit)
852 return false;
853 if (strstr(unit, "/sec") ||
854 strstr(unit, "hz") ||
855 strstr(unit, "Hz") ||
856 strstr(unit, "CPUs utilized"))
857 return false;
858 return true;
859 }
860
861 static const char *fixunit(char *buf, struct perf_evsel *evsel,
862 const char *unit)
863 {
864 if (!strncmp(unit, "of all", 6)) {
865 snprintf(buf, 1024, "%s %s", perf_evsel__name(evsel),
866 unit);
867 return buf;
868 }
869 return unit;
870 }
871
872 static void print_metric_only(void *ctx, const char *color, const char *fmt,
873 const char *unit, double val)
874 {
875 struct outstate *os = ctx;
876 FILE *out = os->fh;
877 int n;
878 char buf[1024];
879 unsigned mlen = METRIC_ONLY_LEN;
880
881 if (!valid_only_metric(unit))
882 return;
883 unit = fixunit(buf, os->evsel, unit);
884 if (color)
885 n = color_fprintf(out, color, fmt, val);
886 else
887 n = fprintf(out, fmt, val);
888 if (n > METRIC_ONLY_LEN)
889 n = METRIC_ONLY_LEN;
890 if (mlen < strlen(unit))
891 mlen = strlen(unit) + 1;
892 fprintf(out, "%*s", mlen - n, "");
893 }
894
895 static void print_metric_only_csv(void *ctx, const char *color __maybe_unused,
896 const char *fmt,
897 const char *unit, double val)
898 {
899 struct outstate *os = ctx;
900 FILE *out = os->fh;
901 char buf[64], *vals, *ends;
902 char tbuf[1024];
903
904 if (!valid_only_metric(unit))
905 return;
906 unit = fixunit(tbuf, os->evsel, unit);
907 snprintf(buf, sizeof buf, fmt, val);
908 vals = buf;
909 while (isspace(*vals))
910 vals++;
911 ends = vals;
912 while (isdigit(*ends) || *ends == '.')
913 ends++;
914 *ends = 0;
915 fprintf(out, "%s%s", vals, csv_sep);
916 }
917
918 static void new_line_metric(void *ctx __maybe_unused)
919 {
920 }
921
922 static void print_metric_header(void *ctx, const char *color __maybe_unused,
923 const char *fmt __maybe_unused,
924 const char *unit, double val __maybe_unused)
925 {
926 struct outstate *os = ctx;
927 char tbuf[1024];
928
929 if (!valid_only_metric(unit))
930 return;
931 unit = fixunit(tbuf, os->evsel, unit);
932 if (csv_output)
933 fprintf(os->fh, "%s%s", unit, csv_sep);
934 else
935 fprintf(os->fh, "%-*s ", METRIC_ONLY_LEN, unit);
936 }
937
938 static void nsec_printout(int id, int nr, struct perf_evsel *evsel, double avg)
939 {
940 FILE *output = stat_config.output;
941 double msecs = avg / 1e6;
942 const char *fmt_v, *fmt_n;
943 char name[25];
944
945 fmt_v = csv_output ? "%.6f%s" : "%18.6f%s";
946 fmt_n = csv_output ? "%s" : "%-25s";
947
948 aggr_printout(evsel, id, nr);
949
950 scnprintf(name, sizeof(name), "%s%s",
951 perf_evsel__name(evsel), csv_output ? "" : " (msec)");
952
953 fprintf(output, fmt_v, msecs, csv_sep);
954
955 if (csv_output)
956 fprintf(output, "%s%s", evsel->unit, csv_sep);
957 else
958 fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep);
959
960 fprintf(output, fmt_n, name);
961
962 if (evsel->cgrp)
963 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
964 }
965
966 static int first_shadow_cpu(struct perf_evsel *evsel, int id)
967 {
968 int i;
969
970 if (!aggr_get_id)
971 return 0;
972
973 if (stat_config.aggr_mode == AGGR_NONE)
974 return id;
975
976 if (stat_config.aggr_mode == AGGR_GLOBAL)
977 return 0;
978
979 for (i = 0; i < perf_evsel__nr_cpus(evsel); i++) {
980 int cpu2 = perf_evsel__cpus(evsel)->map[i];
981
982 if (aggr_get_id(evsel_list->cpus, cpu2) == id)
983 return cpu2;
984 }
985 return 0;
986 }
987
988 static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
989 {
990 FILE *output = stat_config.output;
991 double sc = evsel->scale;
992 const char *fmt;
993
994 if (csv_output) {
995 fmt = floor(sc) != sc ? "%.2f%s" : "%.0f%s";
996 } else {
997 if (big_num)
998 fmt = floor(sc) != sc ? "%'18.2f%s" : "%'18.0f%s";
999 else
1000 fmt = floor(sc) != sc ? "%18.2f%s" : "%18.0f%s";
1001 }
1002
1003 aggr_printout(evsel, id, nr);
1004
1005 fprintf(output, fmt, avg, csv_sep);
1006
1007 if (evsel->unit)
1008 fprintf(output, "%-*s%s",
1009 csv_output ? 0 : unit_width,
1010 evsel->unit, csv_sep);
1011
1012 fprintf(output, "%-*s", csv_output ? 0 : 25, perf_evsel__name(evsel));
1013
1014 if (evsel->cgrp)
1015 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
1016 }
1017
1018 static void printout(int id, int nr, struct perf_evsel *counter, double uval,
1019 char *prefix, u64 run, u64 ena, double noise)
1020 {
1021 struct perf_stat_output_ctx out;
1022 struct outstate os = {
1023 .fh = stat_config.output,
1024 .prefix = prefix ? prefix : "",
1025 .id = id,
1026 .nr = nr,
1027 .evsel = counter,
1028 };
1029 print_metric_t pm = print_metric_std;
1030 void (*nl)(void *);
1031
1032 if (metric_only) {
1033 nl = new_line_metric;
1034 if (csv_output)
1035 pm = print_metric_only_csv;
1036 else
1037 pm = print_metric_only;
1038 } else
1039 nl = new_line_std;
1040
1041 if (csv_output && !metric_only) {
1042 static int aggr_fields[] = {
1043 [AGGR_GLOBAL] = 0,
1044 [AGGR_THREAD] = 1,
1045 [AGGR_NONE] = 1,
1046 [AGGR_SOCKET] = 2,
1047 [AGGR_CORE] = 2,
1048 };
1049
1050 pm = print_metric_csv;
1051 nl = new_line_csv;
1052 os.nfields = 3;
1053 os.nfields += aggr_fields[stat_config.aggr_mode];
1054 if (counter->cgrp)
1055 os.nfields++;
1056 }
1057 if (run == 0 || ena == 0 || counter->counts->scaled == -1) {
1058 if (metric_only) {
1059 pm(&os, NULL, "", "", 0);
1060 return;
1061 }
1062 aggr_printout(counter, id, nr);
1063
1064 fprintf(stat_config.output, "%*s%s",
1065 csv_output ? 0 : 18,
1066 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1067 csv_sep);
1068
1069 fprintf(stat_config.output, "%-*s%s",
1070 csv_output ? 0 : unit_width,
1071 counter->unit, csv_sep);
1072
1073 fprintf(stat_config.output, "%*s",
1074 csv_output ? 0 : -25,
1075 perf_evsel__name(counter));
1076
1077 if (counter->cgrp)
1078 fprintf(stat_config.output, "%s%s",
1079 csv_sep, counter->cgrp->name);
1080
1081 if (!csv_output)
1082 pm(&os, NULL, NULL, "", 0);
1083 print_noise(counter, noise);
1084 print_running(run, ena);
1085 if (csv_output)
1086 pm(&os, NULL, NULL, "", 0);
1087 return;
1088 }
1089
1090 if (metric_only)
1091 /* nothing */;
1092 else if (nsec_counter(counter))
1093 nsec_printout(id, nr, counter, uval);
1094 else
1095 abs_printout(id, nr, counter, uval);
1096
1097 out.print_metric = pm;
1098 out.new_line = nl;
1099 out.ctx = &os;
1100
1101 if (csv_output && !metric_only) {
1102 print_noise(counter, noise);
1103 print_running(run, ena);
1104 }
1105
1106 perf_stat__print_shadow_stats(counter, uval,
1107 first_shadow_cpu(counter, id),
1108 &out);
1109 if (!csv_output && !metric_only) {
1110 print_noise(counter, noise);
1111 print_running(run, ena);
1112 }
1113 }
1114
1115 static void aggr_update_shadow(void)
1116 {
1117 int cpu, s2, id, s;
1118 u64 val;
1119 struct perf_evsel *counter;
1120
1121 for (s = 0; s < aggr_map->nr; s++) {
1122 id = aggr_map->map[s];
1123 evlist__for_each(evsel_list, counter) {
1124 val = 0;
1125 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1126 s2 = aggr_get_id(evsel_list->cpus, cpu);
1127 if (s2 != id)
1128 continue;
1129 val += perf_counts(counter->counts, cpu, 0)->val;
1130 }
1131 val = val * counter->scale;
1132 perf_stat__update_shadow_stats(counter, &val,
1133 first_shadow_cpu(counter, id));
1134 }
1135 }
1136 }
1137
1138 static void print_aggr(char *prefix)
1139 {
1140 FILE *output = stat_config.output;
1141 struct perf_evsel *counter;
1142 int cpu, s, s2, id, nr;
1143 double uval;
1144 u64 ena, run, val;
1145 bool first;
1146
1147 if (!(aggr_map || aggr_get_id))
1148 return;
1149
1150 aggr_update_shadow();
1151
1152 /*
1153 * With metric_only everything is on a single line.
1154 * Without each counter has its own line.
1155 */
1156 for (s = 0; s < aggr_map->nr; s++) {
1157 if (prefix && metric_only)
1158 fprintf(output, "%s", prefix);
1159
1160 id = aggr_map->map[s];
1161 first = true;
1162 evlist__for_each(evsel_list, counter) {
1163 val = ena = run = 0;
1164 nr = 0;
1165 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1166 s2 = aggr_get_id(perf_evsel__cpus(counter), cpu);
1167 if (s2 != id)
1168 continue;
1169 val += perf_counts(counter->counts, cpu, 0)->val;
1170 ena += perf_counts(counter->counts, cpu, 0)->ena;
1171 run += perf_counts(counter->counts, cpu, 0)->run;
1172 nr++;
1173 }
1174 if (first && metric_only) {
1175 first = false;
1176 aggr_printout(counter, id, nr);
1177 }
1178 if (prefix && !metric_only)
1179 fprintf(output, "%s", prefix);
1180
1181 uval = val * counter->scale;
1182 printout(id, nr, counter, uval, prefix, run, ena, 1.0);
1183 if (!metric_only)
1184 fputc('\n', output);
1185 }
1186 if (metric_only)
1187 fputc('\n', output);
1188 }
1189 }
1190
1191 static void print_aggr_thread(struct perf_evsel *counter, char *prefix)
1192 {
1193 FILE *output = stat_config.output;
1194 int nthreads = thread_map__nr(counter->threads);
1195 int ncpus = cpu_map__nr(counter->cpus);
1196 int cpu, thread;
1197 double uval;
1198
1199 for (thread = 0; thread < nthreads; thread++) {
1200 u64 ena = 0, run = 0, val = 0;
1201
1202 for (cpu = 0; cpu < ncpus; cpu++) {
1203 val += perf_counts(counter->counts, cpu, thread)->val;
1204 ena += perf_counts(counter->counts, cpu, thread)->ena;
1205 run += perf_counts(counter->counts, cpu, thread)->run;
1206 }
1207
1208 if (prefix)
1209 fprintf(output, "%s", prefix);
1210
1211 uval = val * counter->scale;
1212 printout(thread, 0, counter, uval, prefix, run, ena, 1.0);
1213 fputc('\n', output);
1214 }
1215 }
1216
1217 /*
1218 * Print out the results of a single counter:
1219 * aggregated counts in system-wide mode
1220 */
1221 static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
1222 {
1223 FILE *output = stat_config.output;
1224 struct perf_stat_evsel *ps = counter->priv;
1225 double avg = avg_stats(&ps->res_stats[0]);
1226 double uval;
1227 double avg_enabled, avg_running;
1228
1229 avg_enabled = avg_stats(&ps->res_stats[1]);
1230 avg_running = avg_stats(&ps->res_stats[2]);
1231
1232 if (prefix && !metric_only)
1233 fprintf(output, "%s", prefix);
1234
1235 uval = avg * counter->scale;
1236 printout(-1, 0, counter, uval, prefix, avg_running, avg_enabled, avg);
1237 if (!metric_only)
1238 fprintf(output, "\n");
1239 }
1240
1241 /*
1242 * Print out the results of a single counter:
1243 * does not use aggregated count in system-wide
1244 */
1245 static void print_counter(struct perf_evsel *counter, char *prefix)
1246 {
1247 FILE *output = stat_config.output;
1248 u64 ena, run, val;
1249 double uval;
1250 int cpu;
1251
1252 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1253 val = perf_counts(counter->counts, cpu, 0)->val;
1254 ena = perf_counts(counter->counts, cpu, 0)->ena;
1255 run = perf_counts(counter->counts, cpu, 0)->run;
1256
1257 if (prefix)
1258 fprintf(output, "%s", prefix);
1259
1260 uval = val * counter->scale;
1261 printout(cpu, 0, counter, uval, prefix, run, ena, 1.0);
1262
1263 fputc('\n', output);
1264 }
1265 }
1266
1267 static void print_no_aggr_metric(char *prefix)
1268 {
1269 int cpu;
1270 int nrcpus = 0;
1271 struct perf_evsel *counter;
1272 u64 ena, run, val;
1273 double uval;
1274
1275 nrcpus = evsel_list->cpus->nr;
1276 for (cpu = 0; cpu < nrcpus; cpu++) {
1277 bool first = true;
1278
1279 if (prefix)
1280 fputs(prefix, stat_config.output);
1281 evlist__for_each(evsel_list, counter) {
1282 if (first) {
1283 aggr_printout(counter, cpu, 0);
1284 first = false;
1285 }
1286 val = perf_counts(counter->counts, cpu, 0)->val;
1287 ena = perf_counts(counter->counts, cpu, 0)->ena;
1288 run = perf_counts(counter->counts, cpu, 0)->run;
1289
1290 uval = val * counter->scale;
1291 printout(cpu, 0, counter, uval, prefix, run, ena, 1.0);
1292 }
1293 fputc('\n', stat_config.output);
1294 }
1295 }
1296
1297 static int aggr_header_lens[] = {
1298 [AGGR_CORE] = 18,
1299 [AGGR_SOCKET] = 12,
1300 [AGGR_NONE] = 6,
1301 [AGGR_THREAD] = 24,
1302 [AGGR_GLOBAL] = 0,
1303 };
1304
1305 static void print_metric_headers(char *prefix)
1306 {
1307 struct perf_stat_output_ctx out;
1308 struct perf_evsel *counter;
1309 struct outstate os = {
1310 .fh = stat_config.output
1311 };
1312
1313 if (prefix)
1314 fprintf(stat_config.output, "%s", prefix);
1315
1316 if (!csv_output)
1317 fprintf(stat_config.output, "%*s",
1318 aggr_header_lens[stat_config.aggr_mode], "");
1319
1320 /* Print metrics headers only */
1321 evlist__for_each(evsel_list, counter) {
1322 os.evsel = counter;
1323 out.ctx = &os;
1324 out.print_metric = print_metric_header;
1325 out.new_line = new_line_metric;
1326 os.evsel = counter;
1327 perf_stat__print_shadow_stats(counter, 0,
1328 0,
1329 &out);
1330 }
1331 fputc('\n', stat_config.output);
1332 }
1333
1334 static void print_interval(char *prefix, struct timespec *ts)
1335 {
1336 FILE *output = stat_config.output;
1337 static int num_print_interval;
1338
1339 sprintf(prefix, "%6lu.%09lu%s", ts->tv_sec, ts->tv_nsec, csv_sep);
1340
1341 if (num_print_interval == 0 && !csv_output && !metric_only) {
1342 switch (stat_config.aggr_mode) {
1343 case AGGR_SOCKET:
1344 fprintf(output, "# time socket cpus counts %*s events\n", unit_width, "unit");
1345 break;
1346 case AGGR_CORE:
1347 fprintf(output, "# time core cpus counts %*s events\n", unit_width, "unit");
1348 break;
1349 case AGGR_NONE:
1350 fprintf(output, "# time CPU counts %*s events\n", unit_width, "unit");
1351 break;
1352 case AGGR_THREAD:
1353 fprintf(output, "# time comm-pid counts %*s events\n", unit_width, "unit");
1354 break;
1355 case AGGR_GLOBAL:
1356 default:
1357 fprintf(output, "# time counts %*s events\n", unit_width, "unit");
1358 case AGGR_UNSET:
1359 break;
1360 }
1361 }
1362
1363 if (++num_print_interval == 25)
1364 num_print_interval = 0;
1365 }
1366
1367 static void print_header(int argc, const char **argv)
1368 {
1369 FILE *output = stat_config.output;
1370 int i;
1371
1372 fflush(stdout);
1373
1374 if (!csv_output) {
1375 fprintf(output, "\n");
1376 fprintf(output, " Performance counter stats for ");
1377 if (target.system_wide)
1378 fprintf(output, "\'system wide");
1379 else if (target.cpu_list)
1380 fprintf(output, "\'CPU(s) %s", target.cpu_list);
1381 else if (!target__has_task(&target)) {
1382 fprintf(output, "\'%s", argv ? argv[0] : "pipe");
1383 for (i = 1; argv && (i < argc); i++)
1384 fprintf(output, " %s", argv[i]);
1385 } else if (target.pid)
1386 fprintf(output, "process id \'%s", target.pid);
1387 else
1388 fprintf(output, "thread id \'%s", target.tid);
1389
1390 fprintf(output, "\'");
1391 if (run_count > 1)
1392 fprintf(output, " (%d runs)", run_count);
1393 fprintf(output, ":\n\n");
1394 }
1395 }
1396
1397 static void print_footer(void)
1398 {
1399 FILE *output = stat_config.output;
1400
1401 if (!null_run)
1402 fprintf(output, "\n");
1403 fprintf(output, " %17.9f seconds time elapsed",
1404 avg_stats(&walltime_nsecs_stats)/1e9);
1405 if (run_count > 1) {
1406 fprintf(output, " ");
1407 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1408 avg_stats(&walltime_nsecs_stats));
1409 }
1410 fprintf(output, "\n\n");
1411 }
1412
1413 static void print_counters(struct timespec *ts, int argc, const char **argv)
1414 {
1415 int interval = stat_config.interval;
1416 struct perf_evsel *counter;
1417 char buf[64], *prefix = NULL;
1418
1419 /* Do not print anything if we record to the pipe. */
1420 if (STAT_RECORD && perf_stat.file.is_pipe)
1421 return;
1422
1423 if (interval)
1424 print_interval(prefix = buf, ts);
1425 else
1426 print_header(argc, argv);
1427
1428 if (metric_only) {
1429 static int num_print_iv;
1430
1431 if (num_print_iv == 0)
1432 print_metric_headers(prefix);
1433 if (num_print_iv++ == 25)
1434 num_print_iv = 0;
1435 if (stat_config.aggr_mode == AGGR_GLOBAL && prefix)
1436 fprintf(stat_config.output, "%s", prefix);
1437 }
1438
1439 switch (stat_config.aggr_mode) {
1440 case AGGR_CORE:
1441 case AGGR_SOCKET:
1442 print_aggr(prefix);
1443 break;
1444 case AGGR_THREAD:
1445 evlist__for_each(evsel_list, counter)
1446 print_aggr_thread(counter, prefix);
1447 break;
1448 case AGGR_GLOBAL:
1449 evlist__for_each(evsel_list, counter)
1450 print_counter_aggr(counter, prefix);
1451 if (metric_only)
1452 fputc('\n', stat_config.output);
1453 break;
1454 case AGGR_NONE:
1455 if (metric_only)
1456 print_no_aggr_metric(prefix);
1457 else {
1458 evlist__for_each(evsel_list, counter)
1459 print_counter(counter, prefix);
1460 }
1461 break;
1462 case AGGR_UNSET:
1463 default:
1464 break;
1465 }
1466
1467 if (!interval && !csv_output)
1468 print_footer();
1469
1470 fflush(stat_config.output);
1471 }
1472
1473 static volatile int signr = -1;
1474
1475 static void skip_signal(int signo)
1476 {
1477 if ((child_pid == -1) || stat_config.interval)
1478 done = 1;
1479
1480 signr = signo;
1481 /*
1482 * render child_pid harmless
1483 * won't send SIGTERM to a random
1484 * process in case of race condition
1485 * and fast PID recycling
1486 */
1487 child_pid = -1;
1488 }
1489
1490 static void sig_atexit(void)
1491 {
1492 sigset_t set, oset;
1493
1494 /*
1495 * avoid race condition with SIGCHLD handler
1496 * in skip_signal() which is modifying child_pid
1497 * goal is to avoid send SIGTERM to a random
1498 * process
1499 */
1500 sigemptyset(&set);
1501 sigaddset(&set, SIGCHLD);
1502 sigprocmask(SIG_BLOCK, &set, &oset);
1503
1504 if (child_pid != -1)
1505 kill(child_pid, SIGTERM);
1506
1507 sigprocmask(SIG_SETMASK, &oset, NULL);
1508
1509 if (signr == -1)
1510 return;
1511
1512 signal(signr, SIG_DFL);
1513 kill(getpid(), signr);
1514 }
1515
1516 static int stat__set_big_num(const struct option *opt __maybe_unused,
1517 const char *s __maybe_unused, int unset)
1518 {
1519 big_num_opt = unset ? 0 : 1;
1520 return 0;
1521 }
1522
1523 static const struct option stat_options[] = {
1524 OPT_BOOLEAN('T', "transaction", &transaction_run,
1525 "hardware transaction statistics"),
1526 OPT_CALLBACK('e', "event", &evsel_list, "event",
1527 "event selector. use 'perf list' to list available events",
1528 parse_events_option),
1529 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1530 "event filter", parse_filter),
1531 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1532 "child tasks do not inherit counters"),
1533 OPT_STRING('p', "pid", &target.pid, "pid",
1534 "stat events on existing process id"),
1535 OPT_STRING('t', "tid", &target.tid, "tid",
1536 "stat events on existing thread id"),
1537 OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1538 "system-wide collection from all CPUs"),
1539 OPT_BOOLEAN('g', "group", &group,
1540 "put the counters into a counter group"),
1541 OPT_BOOLEAN('c', "scale", &stat_config.scale, "scale/normalize counters"),
1542 OPT_INCR('v', "verbose", &verbose,
1543 "be more verbose (show counter open errors, etc)"),
1544 OPT_INTEGER('r', "repeat", &run_count,
1545 "repeat command and print average + stddev (max: 100, forever: 0)"),
1546 OPT_BOOLEAN('n', "null", &null_run,
1547 "null run - dont start any counters"),
1548 OPT_INCR('d', "detailed", &detailed_run,
1549 "detailed run - start a lot of events"),
1550 OPT_BOOLEAN('S', "sync", &sync_run,
1551 "call sync() before starting a run"),
1552 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1553 "print large numbers with thousands\' separators",
1554 stat__set_big_num),
1555 OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1556 "list of cpus to monitor in system-wide"),
1557 OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
1558 "disable CPU count aggregation", AGGR_NONE),
1559 OPT_STRING('x', "field-separator", &csv_sep, "separator",
1560 "print counts with custom separator"),
1561 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1562 "monitor event in cgroup name only", parse_cgroups),
1563 OPT_STRING('o', "output", &output_name, "file", "output file name"),
1564 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1565 OPT_INTEGER(0, "log-fd", &output_fd,
1566 "log output to fd, instead of stderr"),
1567 OPT_STRING(0, "pre", &pre_cmd, "command",
1568 "command to run prior to the measured command"),
1569 OPT_STRING(0, "post", &post_cmd, "command",
1570 "command to run after to the measured command"),
1571 OPT_UINTEGER('I', "interval-print", &stat_config.interval,
1572 "print counts at regular interval in ms (>= 10)"),
1573 OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
1574 "aggregate counts per processor socket", AGGR_SOCKET),
1575 OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
1576 "aggregate counts per physical processor core", AGGR_CORE),
1577 OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
1578 "aggregate counts per thread", AGGR_THREAD),
1579 OPT_UINTEGER('D', "delay", &initial_delay,
1580 "ms to wait before starting measurement after program start"),
1581 OPT_BOOLEAN(0, "metric-only", &metric_only,
1582 "Only print computed metrics. No raw values"),
1583 OPT_END()
1584 };
1585
1586 static int perf_stat__get_socket(struct cpu_map *map, int cpu)
1587 {
1588 return cpu_map__get_socket(map, cpu, NULL);
1589 }
1590
1591 static int perf_stat__get_core(struct cpu_map *map, int cpu)
1592 {
1593 return cpu_map__get_core(map, cpu, NULL);
1594 }
1595
1596 static int cpu_map__get_max(struct cpu_map *map)
1597 {
1598 int i, max = -1;
1599
1600 for (i = 0; i < map->nr; i++) {
1601 if (map->map[i] > max)
1602 max = map->map[i];
1603 }
1604
1605 return max;
1606 }
1607
1608 static struct cpu_map *cpus_aggr_map;
1609
1610 static int perf_stat__get_aggr(aggr_get_id_t get_id, struct cpu_map *map, int idx)
1611 {
1612 int cpu;
1613
1614 if (idx >= map->nr)
1615 return -1;
1616
1617 cpu = map->map[idx];
1618
1619 if (cpus_aggr_map->map[cpu] == -1)
1620 cpus_aggr_map->map[cpu] = get_id(map, idx);
1621
1622 return cpus_aggr_map->map[cpu];
1623 }
1624
1625 static int perf_stat__get_socket_cached(struct cpu_map *map, int idx)
1626 {
1627 return perf_stat__get_aggr(perf_stat__get_socket, map, idx);
1628 }
1629
1630 static int perf_stat__get_core_cached(struct cpu_map *map, int idx)
1631 {
1632 return perf_stat__get_aggr(perf_stat__get_core, map, idx);
1633 }
1634
1635 static int perf_stat_init_aggr_mode(void)
1636 {
1637 int nr;
1638
1639 switch (stat_config.aggr_mode) {
1640 case AGGR_SOCKET:
1641 if (cpu_map__build_socket_map(evsel_list->cpus, &aggr_map)) {
1642 perror("cannot build socket map");
1643 return -1;
1644 }
1645 aggr_get_id = perf_stat__get_socket_cached;
1646 break;
1647 case AGGR_CORE:
1648 if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
1649 perror("cannot build core map");
1650 return -1;
1651 }
1652 aggr_get_id = perf_stat__get_core_cached;
1653 break;
1654 case AGGR_NONE:
1655 case AGGR_GLOBAL:
1656 case AGGR_THREAD:
1657 case AGGR_UNSET:
1658 default:
1659 break;
1660 }
1661
1662 /*
1663 * The evsel_list->cpus is the base we operate on,
1664 * taking the highest cpu number to be the size of
1665 * the aggregation translate cpumap.
1666 */
1667 nr = cpu_map__get_max(evsel_list->cpus);
1668 cpus_aggr_map = cpu_map__empty_new(nr + 1);
1669 return cpus_aggr_map ? 0 : -ENOMEM;
1670 }
1671
1672 static void perf_stat__exit_aggr_mode(void)
1673 {
1674 cpu_map__put(aggr_map);
1675 cpu_map__put(cpus_aggr_map);
1676 aggr_map = NULL;
1677 cpus_aggr_map = NULL;
1678 }
1679
1680 static inline int perf_env__get_cpu(struct perf_env *env, struct cpu_map *map, int idx)
1681 {
1682 int cpu;
1683
1684 if (idx > map->nr)
1685 return -1;
1686
1687 cpu = map->map[idx];
1688
1689 if (cpu >= env->nr_cpus_online)
1690 return -1;
1691
1692 return cpu;
1693 }
1694
1695 static int perf_env__get_socket(struct cpu_map *map, int idx, void *data)
1696 {
1697 struct perf_env *env = data;
1698 int cpu = perf_env__get_cpu(env, map, idx);
1699
1700 return cpu == -1 ? -1 : env->cpu[cpu].socket_id;
1701 }
1702
1703 static int perf_env__get_core(struct cpu_map *map, int idx, void *data)
1704 {
1705 struct perf_env *env = data;
1706 int core = -1, cpu = perf_env__get_cpu(env, map, idx);
1707
1708 if (cpu != -1) {
1709 int socket_id = env->cpu[cpu].socket_id;
1710
1711 /*
1712 * Encode socket in upper 16 bits
1713 * core_id is relative to socket, and
1714 * we need a global id. So we combine
1715 * socket + core id.
1716 */
1717 core = (socket_id << 16) | (env->cpu[cpu].core_id & 0xffff);
1718 }
1719
1720 return core;
1721 }
1722
1723 static int perf_env__build_socket_map(struct perf_env *env, struct cpu_map *cpus,
1724 struct cpu_map **sockp)
1725 {
1726 return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
1727 }
1728
1729 static int perf_env__build_core_map(struct perf_env *env, struct cpu_map *cpus,
1730 struct cpu_map **corep)
1731 {
1732 return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
1733 }
1734
1735 static int perf_stat__get_socket_file(struct cpu_map *map, int idx)
1736 {
1737 return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
1738 }
1739
1740 static int perf_stat__get_core_file(struct cpu_map *map, int idx)
1741 {
1742 return perf_env__get_core(map, idx, &perf_stat.session->header.env);
1743 }
1744
1745 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
1746 {
1747 struct perf_env *env = &st->session->header.env;
1748
1749 switch (stat_config.aggr_mode) {
1750 case AGGR_SOCKET:
1751 if (perf_env__build_socket_map(env, evsel_list->cpus, &aggr_map)) {
1752 perror("cannot build socket map");
1753 return -1;
1754 }
1755 aggr_get_id = perf_stat__get_socket_file;
1756 break;
1757 case AGGR_CORE:
1758 if (perf_env__build_core_map(env, evsel_list->cpus, &aggr_map)) {
1759 perror("cannot build core map");
1760 return -1;
1761 }
1762 aggr_get_id = perf_stat__get_core_file;
1763 break;
1764 case AGGR_NONE:
1765 case AGGR_GLOBAL:
1766 case AGGR_THREAD:
1767 case AGGR_UNSET:
1768 default:
1769 break;
1770 }
1771
1772 return 0;
1773 }
1774
1775 /*
1776 * Add default attributes, if there were no attributes specified or
1777 * if -d/--detailed, -d -d or -d -d -d is used:
1778 */
1779 static int add_default_attributes(void)
1780 {
1781 struct perf_event_attr default_attrs0[] = {
1782
1783 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
1784 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
1785 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
1786 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
1787
1788 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
1789 };
1790 struct perf_event_attr frontend_attrs[] = {
1791 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1792 };
1793 struct perf_event_attr backend_attrs[] = {
1794 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
1795 };
1796 struct perf_event_attr default_attrs1[] = {
1797 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
1798 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
1799 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
1800
1801 };
1802
1803 /*
1804 * Detailed stats (-d), covering the L1 and last level data caches:
1805 */
1806 struct perf_event_attr detailed_attrs[] = {
1807
1808 { .type = PERF_TYPE_HW_CACHE,
1809 .config =
1810 PERF_COUNT_HW_CACHE_L1D << 0 |
1811 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1812 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1813
1814 { .type = PERF_TYPE_HW_CACHE,
1815 .config =
1816 PERF_COUNT_HW_CACHE_L1D << 0 |
1817 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1818 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1819
1820 { .type = PERF_TYPE_HW_CACHE,
1821 .config =
1822 PERF_COUNT_HW_CACHE_LL << 0 |
1823 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1824 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1825
1826 { .type = PERF_TYPE_HW_CACHE,
1827 .config =
1828 PERF_COUNT_HW_CACHE_LL << 0 |
1829 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1830 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1831 };
1832
1833 /*
1834 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1835 */
1836 struct perf_event_attr very_detailed_attrs[] = {
1837
1838 { .type = PERF_TYPE_HW_CACHE,
1839 .config =
1840 PERF_COUNT_HW_CACHE_L1I << 0 |
1841 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1842 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1843
1844 { .type = PERF_TYPE_HW_CACHE,
1845 .config =
1846 PERF_COUNT_HW_CACHE_L1I << 0 |
1847 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1848 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1849
1850 { .type = PERF_TYPE_HW_CACHE,
1851 .config =
1852 PERF_COUNT_HW_CACHE_DTLB << 0 |
1853 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1854 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1855
1856 { .type = PERF_TYPE_HW_CACHE,
1857 .config =
1858 PERF_COUNT_HW_CACHE_DTLB << 0 |
1859 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1860 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1861
1862 { .type = PERF_TYPE_HW_CACHE,
1863 .config =
1864 PERF_COUNT_HW_CACHE_ITLB << 0 |
1865 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1866 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1867
1868 { .type = PERF_TYPE_HW_CACHE,
1869 .config =
1870 PERF_COUNT_HW_CACHE_ITLB << 0 |
1871 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1872 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1873
1874 };
1875
1876 /*
1877 * Very, very detailed stats (-d -d -d), adding prefetch events:
1878 */
1879 struct perf_event_attr very_very_detailed_attrs[] = {
1880
1881 { .type = PERF_TYPE_HW_CACHE,
1882 .config =
1883 PERF_COUNT_HW_CACHE_L1D << 0 |
1884 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1885 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1886
1887 { .type = PERF_TYPE_HW_CACHE,
1888 .config =
1889 PERF_COUNT_HW_CACHE_L1D << 0 |
1890 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1891 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1892 };
1893
1894 /* Set attrs if no event is selected and !null_run: */
1895 if (null_run)
1896 return 0;
1897
1898 if (transaction_run) {
1899 int err;
1900 if (pmu_have_event("cpu", "cycles-ct") &&
1901 pmu_have_event("cpu", "el-start"))
1902 err = parse_events(evsel_list, transaction_attrs, NULL);
1903 else
1904 err = parse_events(evsel_list, transaction_limited_attrs, NULL);
1905 if (err) {
1906 fprintf(stderr, "Cannot set up transaction events\n");
1907 return -1;
1908 }
1909 return 0;
1910 }
1911
1912 if (!evsel_list->nr_entries) {
1913 if (target__has_cpu(&target))
1914 default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
1915
1916 if (perf_evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
1917 return -1;
1918 if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
1919 if (perf_evlist__add_default_attrs(evsel_list,
1920 frontend_attrs) < 0)
1921 return -1;
1922 }
1923 if (pmu_have_event("cpu", "stalled-cycles-backend")) {
1924 if (perf_evlist__add_default_attrs(evsel_list,
1925 backend_attrs) < 0)
1926 return -1;
1927 }
1928 if (perf_evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
1929 return -1;
1930 }
1931
1932 /* Detailed events get appended to the event list: */
1933
1934 if (detailed_run < 1)
1935 return 0;
1936
1937 /* Append detailed run extra attributes: */
1938 if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1939 return -1;
1940
1941 if (detailed_run < 2)
1942 return 0;
1943
1944 /* Append very detailed run extra attributes: */
1945 if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1946 return -1;
1947
1948 if (detailed_run < 3)
1949 return 0;
1950
1951 /* Append very, very detailed run extra attributes: */
1952 return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1953 }
1954
1955 static const char * const stat_record_usage[] = {
1956 "perf stat record [<options>]",
1957 NULL,
1958 };
1959
1960 static void init_features(struct perf_session *session)
1961 {
1962 int feat;
1963
1964 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
1965 perf_header__set_feat(&session->header, feat);
1966
1967 perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
1968 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
1969 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
1970 perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
1971 }
1972
1973 static int __cmd_record(int argc, const char **argv)
1974 {
1975 struct perf_session *session;
1976 struct perf_data_file *file = &perf_stat.file;
1977
1978 argc = parse_options(argc, argv, stat_options, stat_record_usage,
1979 PARSE_OPT_STOP_AT_NON_OPTION);
1980
1981 if (output_name)
1982 file->path = output_name;
1983
1984 if (run_count != 1 || forever) {
1985 pr_err("Cannot use -r option with perf stat record.\n");
1986 return -1;
1987 }
1988
1989 session = perf_session__new(file, false, NULL);
1990 if (session == NULL) {
1991 pr_err("Perf session creation failed.\n");
1992 return -1;
1993 }
1994
1995 init_features(session);
1996
1997 session->evlist = evsel_list;
1998 perf_stat.session = session;
1999 perf_stat.record = true;
2000 return argc;
2001 }
2002
2003 static int process_stat_round_event(struct perf_tool *tool __maybe_unused,
2004 union perf_event *event,
2005 struct perf_session *session)
2006 {
2007 struct stat_round_event *stat_round = &event->stat_round;
2008 struct perf_evsel *counter;
2009 struct timespec tsh, *ts = NULL;
2010 const char **argv = session->header.env.cmdline_argv;
2011 int argc = session->header.env.nr_cmdline;
2012
2013 evlist__for_each(evsel_list, counter)
2014 perf_stat_process_counter(&stat_config, counter);
2015
2016 if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
2017 update_stats(&walltime_nsecs_stats, stat_round->time);
2018
2019 if (stat_config.interval && stat_round->time) {
2020 tsh.tv_sec = stat_round->time / NSECS_PER_SEC;
2021 tsh.tv_nsec = stat_round->time % NSECS_PER_SEC;
2022 ts = &tsh;
2023 }
2024
2025 print_counters(ts, argc, argv);
2026 return 0;
2027 }
2028
2029 static
2030 int process_stat_config_event(struct perf_tool *tool __maybe_unused,
2031 union perf_event *event,
2032 struct perf_session *session __maybe_unused)
2033 {
2034 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2035
2036 perf_event__read_stat_config(&stat_config, &event->stat_config);
2037
2038 if (cpu_map__empty(st->cpus)) {
2039 if (st->aggr_mode != AGGR_UNSET)
2040 pr_warning("warning: processing task data, aggregation mode not set\n");
2041 return 0;
2042 }
2043
2044 if (st->aggr_mode != AGGR_UNSET)
2045 stat_config.aggr_mode = st->aggr_mode;
2046
2047 if (perf_stat.file.is_pipe)
2048 perf_stat_init_aggr_mode();
2049 else
2050 perf_stat_init_aggr_mode_file(st);
2051
2052 return 0;
2053 }
2054
2055 static int set_maps(struct perf_stat *st)
2056 {
2057 if (!st->cpus || !st->threads)
2058 return 0;
2059
2060 if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
2061 return -EINVAL;
2062
2063 perf_evlist__set_maps(evsel_list, st->cpus, st->threads);
2064
2065 if (perf_evlist__alloc_stats(evsel_list, true))
2066 return -ENOMEM;
2067
2068 st->maps_allocated = true;
2069 return 0;
2070 }
2071
2072 static
2073 int process_thread_map_event(struct perf_tool *tool __maybe_unused,
2074 union perf_event *event,
2075 struct perf_session *session __maybe_unused)
2076 {
2077 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2078
2079 if (st->threads) {
2080 pr_warning("Extra thread map event, ignoring.\n");
2081 return 0;
2082 }
2083
2084 st->threads = thread_map__new_event(&event->thread_map);
2085 if (!st->threads)
2086 return -ENOMEM;
2087
2088 return set_maps(st);
2089 }
2090
2091 static
2092 int process_cpu_map_event(struct perf_tool *tool __maybe_unused,
2093 union perf_event *event,
2094 struct perf_session *session __maybe_unused)
2095 {
2096 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2097 struct cpu_map *cpus;
2098
2099 if (st->cpus) {
2100 pr_warning("Extra cpu map event, ignoring.\n");
2101 return 0;
2102 }
2103
2104 cpus = cpu_map__new_data(&event->cpu_map.data);
2105 if (!cpus)
2106 return -ENOMEM;
2107
2108 st->cpus = cpus;
2109 return set_maps(st);
2110 }
2111
2112 static const char * const stat_report_usage[] = {
2113 "perf stat report [<options>]",
2114 NULL,
2115 };
2116
2117 static struct perf_stat perf_stat = {
2118 .tool = {
2119 .attr = perf_event__process_attr,
2120 .event_update = perf_event__process_event_update,
2121 .thread_map = process_thread_map_event,
2122 .cpu_map = process_cpu_map_event,
2123 .stat_config = process_stat_config_event,
2124 .stat = perf_event__process_stat_event,
2125 .stat_round = process_stat_round_event,
2126 },
2127 .aggr_mode = AGGR_UNSET,
2128 };
2129
2130 static int __cmd_report(int argc, const char **argv)
2131 {
2132 struct perf_session *session;
2133 const struct option options[] = {
2134 OPT_STRING('i', "input", &input_name, "file", "input file name"),
2135 OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
2136 "aggregate counts per processor socket", AGGR_SOCKET),
2137 OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
2138 "aggregate counts per physical processor core", AGGR_CORE),
2139 OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
2140 "disable CPU count aggregation", AGGR_NONE),
2141 OPT_END()
2142 };
2143 struct stat st;
2144 int ret;
2145
2146 argc = parse_options(argc, argv, options, stat_report_usage, 0);
2147
2148 if (!input_name || !strlen(input_name)) {
2149 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
2150 input_name = "-";
2151 else
2152 input_name = "perf.data";
2153 }
2154
2155 perf_stat.file.path = input_name;
2156 perf_stat.file.mode = PERF_DATA_MODE_READ;
2157
2158 session = perf_session__new(&perf_stat.file, false, &perf_stat.tool);
2159 if (session == NULL)
2160 return -1;
2161
2162 perf_stat.session = session;
2163 stat_config.output = stderr;
2164 evsel_list = session->evlist;
2165
2166 ret = perf_session__process_events(session);
2167 if (ret)
2168 return ret;
2169
2170 perf_session__delete(session);
2171 return 0;
2172 }
2173
2174 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
2175 {
2176 const char * const stat_usage[] = {
2177 "perf stat [<options>] [<command>]",
2178 NULL
2179 };
2180 int status = -EINVAL, run_idx;
2181 const char *mode;
2182 FILE *output = stderr;
2183 unsigned int interval;
2184 const char * const stat_subcommands[] = { "record", "report" };
2185
2186 setlocale(LC_ALL, "");
2187
2188 evsel_list = perf_evlist__new();
2189 if (evsel_list == NULL)
2190 return -ENOMEM;
2191
2192 parse_events__shrink_config_terms();
2193 argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
2194 (const char **) stat_usage,
2195 PARSE_OPT_STOP_AT_NON_OPTION);
2196 perf_stat__init_shadow_stats();
2197
2198 if (csv_sep) {
2199 csv_output = true;
2200 if (!strcmp(csv_sep, "\\t"))
2201 csv_sep = "\t";
2202 } else
2203 csv_sep = DEFAULT_SEPARATOR;
2204
2205 if (argc && !strncmp(argv[0], "rec", 3)) {
2206 argc = __cmd_record(argc, argv);
2207 if (argc < 0)
2208 return -1;
2209 } else if (argc && !strncmp(argv[0], "rep", 3))
2210 return __cmd_report(argc, argv);
2211
2212 interval = stat_config.interval;
2213
2214 /*
2215 * For record command the -o is already taken care of.
2216 */
2217 if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
2218 output = NULL;
2219
2220 if (output_name && output_fd) {
2221 fprintf(stderr, "cannot use both --output and --log-fd\n");
2222 parse_options_usage(stat_usage, stat_options, "o", 1);
2223 parse_options_usage(NULL, stat_options, "log-fd", 0);
2224 goto out;
2225 }
2226
2227 if (metric_only && stat_config.aggr_mode == AGGR_THREAD) {
2228 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
2229 goto out;
2230 }
2231
2232 if (metric_only && run_count > 1) {
2233 fprintf(stderr, "--metric-only is not supported with -r\n");
2234 goto out;
2235 }
2236
2237 if (output_fd < 0) {
2238 fprintf(stderr, "argument to --log-fd must be a > 0\n");
2239 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
2240 goto out;
2241 }
2242
2243 if (!output) {
2244 struct timespec tm;
2245 mode = append_file ? "a" : "w";
2246
2247 output = fopen(output_name, mode);
2248 if (!output) {
2249 perror("failed to create output file");
2250 return -1;
2251 }
2252 clock_gettime(CLOCK_REALTIME, &tm);
2253 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
2254 } else if (output_fd > 0) {
2255 mode = append_file ? "a" : "w";
2256 output = fdopen(output_fd, mode);
2257 if (!output) {
2258 perror("Failed opening logfd");
2259 return -errno;
2260 }
2261 }
2262
2263 stat_config.output = output;
2264
2265 /*
2266 * let the spreadsheet do the pretty-printing
2267 */
2268 if (csv_output) {
2269 /* User explicitly passed -B? */
2270 if (big_num_opt == 1) {
2271 fprintf(stderr, "-B option not supported with -x\n");
2272 parse_options_usage(stat_usage, stat_options, "B", 1);
2273 parse_options_usage(NULL, stat_options, "x", 1);
2274 goto out;
2275 } else /* Nope, so disable big number formatting */
2276 big_num = false;
2277 } else if (big_num_opt == 0) /* User passed --no-big-num */
2278 big_num = false;
2279
2280 if (!argc && target__none(&target))
2281 usage_with_options(stat_usage, stat_options);
2282
2283 if (run_count < 0) {
2284 pr_err("Run count must be a positive number\n");
2285 parse_options_usage(stat_usage, stat_options, "r", 1);
2286 goto out;
2287 } else if (run_count == 0) {
2288 forever = true;
2289 run_count = 1;
2290 }
2291
2292 if ((stat_config.aggr_mode == AGGR_THREAD) && !target__has_task(&target)) {
2293 fprintf(stderr, "The --per-thread option is only available "
2294 "when monitoring via -p -t options.\n");
2295 parse_options_usage(NULL, stat_options, "p", 1);
2296 parse_options_usage(NULL, stat_options, "t", 1);
2297 goto out;
2298 }
2299
2300 /*
2301 * no_aggr, cgroup are for system-wide only
2302 * --per-thread is aggregated per thread, we dont mix it with cpu mode
2303 */
2304 if (((stat_config.aggr_mode != AGGR_GLOBAL &&
2305 stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
2306 !target__has_cpu(&target)) {
2307 fprintf(stderr, "both cgroup and no-aggregation "
2308 "modes only available in system-wide mode\n");
2309
2310 parse_options_usage(stat_usage, stat_options, "G", 1);
2311 parse_options_usage(NULL, stat_options, "A", 1);
2312 parse_options_usage(NULL, stat_options, "a", 1);
2313 goto out;
2314 }
2315
2316 if (add_default_attributes())
2317 goto out;
2318
2319 target__validate(&target);
2320
2321 if (perf_evlist__create_maps(evsel_list, &target) < 0) {
2322 if (target__has_task(&target)) {
2323 pr_err("Problems finding threads of monitor\n");
2324 parse_options_usage(stat_usage, stat_options, "p", 1);
2325 parse_options_usage(NULL, stat_options, "t", 1);
2326 } else if (target__has_cpu(&target)) {
2327 perror("failed to parse CPUs map");
2328 parse_options_usage(stat_usage, stat_options, "C", 1);
2329 parse_options_usage(NULL, stat_options, "a", 1);
2330 }
2331 goto out;
2332 }
2333
2334 /*
2335 * Initialize thread_map with comm names,
2336 * so we could print it out on output.
2337 */
2338 if (stat_config.aggr_mode == AGGR_THREAD)
2339 thread_map__read_comms(evsel_list->threads);
2340
2341 if (interval && interval < 100) {
2342 if (interval < 10) {
2343 pr_err("print interval must be >= 10ms\n");
2344 parse_options_usage(stat_usage, stat_options, "I", 1);
2345 goto out;
2346 } else
2347 pr_warning("print interval < 100ms. "
2348 "The overhead percentage could be high in some cases. "
2349 "Please proceed with caution.\n");
2350 }
2351
2352 if (perf_evlist__alloc_stats(evsel_list, interval))
2353 goto out;
2354
2355 if (perf_stat_init_aggr_mode())
2356 goto out;
2357
2358 /*
2359 * We dont want to block the signals - that would cause
2360 * child tasks to inherit that and Ctrl-C would not work.
2361 * What we want is for Ctrl-C to work in the exec()-ed
2362 * task, but being ignored by perf stat itself:
2363 */
2364 atexit(sig_atexit);
2365 if (!forever)
2366 signal(SIGINT, skip_signal);
2367 signal(SIGCHLD, skip_signal);
2368 signal(SIGALRM, skip_signal);
2369 signal(SIGABRT, skip_signal);
2370
2371 status = 0;
2372 for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
2373 if (run_count != 1 && verbose)
2374 fprintf(output, "[ perf stat: executing run #%d ... ]\n",
2375 run_idx + 1);
2376
2377 status = run_perf_stat(argc, argv);
2378 if (forever && status != -1) {
2379 print_counters(NULL, argc, argv);
2380 perf_stat__reset_stats();
2381 }
2382 }
2383
2384 if (!forever && status != -1 && !interval)
2385 print_counters(NULL, argc, argv);
2386
2387 if (STAT_RECORD) {
2388 /*
2389 * We synthesize the kernel mmap record just so that older tools
2390 * don't emit warnings about not being able to resolve symbols
2391 * due to /proc/sys/kernel/kptr_restrict settings and instear provide
2392 * a saner message about no samples being in the perf.data file.
2393 *
2394 * This also serves to suppress a warning about f_header.data.size == 0
2395 * in header.c at the moment 'perf stat record' gets introduced, which
2396 * is not really needed once we start adding the stat specific PERF_RECORD_
2397 * records, but the need to suppress the kptr_restrict messages in older
2398 * tools remain -acme
2399 */
2400 int fd = perf_data_file__fd(&perf_stat.file);
2401 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
2402 process_synthesized_event,
2403 &perf_stat.session->machines.host);
2404 if (err) {
2405 pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
2406 "older tools may produce warnings about this file\n.");
2407 }
2408
2409 if (!interval) {
2410 if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
2411 pr_err("failed to write stat round event\n");
2412 }
2413
2414 if (!perf_stat.file.is_pipe) {
2415 perf_stat.session->header.data_size += perf_stat.bytes_written;
2416 perf_session__write_header(perf_stat.session, evsel_list, fd, true);
2417 }
2418
2419 perf_session__delete(perf_stat.session);
2420 }
2421
2422 perf_stat__exit_aggr_mode();
2423 perf_evlist__free_stats(evsel_list);
2424 out:
2425 perf_evlist__delete(evsel_list);
2426 return status;
2427 }
Linux kernel - Deliverables
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