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