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Linux 5.1.15
[linux/fpc-iii.git] / tools / perf / builtin-stat.c
blobc3625ec374e0658e66a3ed7beadbcbe19b5929c0
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/group.h"
63 #include "util/session.h"
64 #include "util/tool.h"
65 #include "util/string2.h"
66 #include "util/metricgroup.h"
67 #include "util/top.h"
68 #include "asm/bug.h"
69
70 #include <linux/time64.h>
71 #include <api/fs/fs.h>
72 #include <errno.h>
73 #include <signal.h>
74 #include <stdlib.h>
75 #include <sys/prctl.h>
76 #include <inttypes.h>
77 #include <locale.h>
78 #include <math.h>
79 #include <sys/types.h>
80 #include <sys/stat.h>
81 #include <sys/wait.h>
82 #include <unistd.h>
83 #include <sys/time.h>
84 #include <sys/resource.h>
85
86 #include "sane_ctype.h"
87
88 #define DEFAULT_SEPARATOR " "
89 #define FREEZE_ON_SMI_PATH "devices/cpu/freeze_on_smi"
90
91 static void print_counters(struct timespec *ts, int argc, const char **argv);
92
93 /* Default events used for perf stat -T */
94 static const char *transaction_attrs = {
95 "task-clock,"
96 "{"
97 "instructions,"
98 "cycles,"
99 "cpu/cycles-t/,"
100 "cpu/tx-start/,"
101 "cpu/el-start/,"
102 "cpu/cycles-ct/"
103 "}"
104 };
105
106 /* More limited version when the CPU does not have all events. */
107 static const char * transaction_limited_attrs = {
108 "task-clock,"
109 "{"
110 "instructions,"
111 "cycles,"
112 "cpu/cycles-t/,"
113 "cpu/tx-start/"
114 "}"
115 };
116
117 static const char * topdown_attrs[] = {
118 "topdown-total-slots",
119 "topdown-slots-retired",
120 "topdown-recovery-bubbles",
121 "topdown-fetch-bubbles",
122 "topdown-slots-issued",
123 NULL,
124 };
125
126 static const char *smi_cost_attrs = {
127 "{"
128 "msr/aperf/,"
129 "msr/smi/,"
130 "cycles"
131 "}"
132 };
133
134 static struct perf_evlist *evsel_list;
135
136 static struct target target = {
137 .uid = UINT_MAX,
138 };
139
140 #define METRIC_ONLY_LEN 20
141
142 static volatile pid_t child_pid = -1;
143 static int detailed_run = 0;
144 static bool transaction_run;
145 static bool topdown_run = false;
146 static bool smi_cost = false;
147 static bool smi_reset = false;
148 static int big_num_opt = -1;
149 static bool group = false;
150 static const char *pre_cmd = NULL;
151 static const char *post_cmd = NULL;
152 static bool sync_run = false;
153 static bool forever = false;
154 static bool force_metric_only = false;
155 static struct timespec ref_time;
156 static bool append_file;
157 static bool interval_count;
158 static const char *output_name;
159 static int output_fd;
160
161 struct perf_stat {
162 bool record;
163 struct perf_data data;
164 struct perf_session *session;
165 u64 bytes_written;
166 struct perf_tool tool;
167 bool maps_allocated;
168 struct cpu_map *cpus;
169 struct thread_map *threads;
170 enum aggr_mode aggr_mode;
171 };
172
173 static struct perf_stat perf_stat;
174 #define STAT_RECORD perf_stat.record
175
176 static volatile int done = 0;
177
178 static struct perf_stat_config stat_config = {
179 .aggr_mode = AGGR_GLOBAL,
180 .scale = true,
181 .unit_width = 4, /* strlen("unit") */
182 .run_count = 1,
183 .metric_only_len = METRIC_ONLY_LEN,
184 .walltime_nsecs_stats = &walltime_nsecs_stats,
185 .big_num = true,
186 };
187
188 static inline void diff_timespec(struct timespec *r, struct timespec *a,
189 struct timespec *b)
190 {
191 r->tv_sec = a->tv_sec - b->tv_sec;
192 if (a->tv_nsec < b->tv_nsec) {
193 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
194 r->tv_sec--;
195 } else {
196 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
197 }
198 }
199
200 static void perf_stat__reset_stats(void)
201 {
202 int i;
203
204 perf_evlist__reset_stats(evsel_list);
205 perf_stat__reset_shadow_stats();
206
207 for (i = 0; i < stat_config.stats_num; i++)
208 perf_stat__reset_shadow_per_stat(&stat_config.stats[i]);
209 }
210
211 static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
212 union perf_event *event,
213 struct perf_sample *sample __maybe_unused,
214 struct machine *machine __maybe_unused)
215 {
216 if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) {
217 pr_err("failed to write perf data, error: %m\n");
218 return -1;
219 }
220
221 perf_stat.bytes_written += event->header.size;
222 return 0;
223 }
224
225 static int write_stat_round_event(u64 tm, u64 type)
226 {
227 return perf_event__synthesize_stat_round(NULL, tm, type,
228 process_synthesized_event,
229 NULL);
230 }
231
232 #define WRITE_STAT_ROUND_EVENT(time, interval) \
233 write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
234
235 #define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
236
237 static int
238 perf_evsel__write_stat_event(struct perf_evsel *counter, u32 cpu, u32 thread,
239 struct perf_counts_values *count)
240 {
241 struct perf_sample_id *sid = SID(counter, cpu, thread);
242
243 return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
244 process_synthesized_event, NULL);
245 }
246
247 /*
248 * Read out the results of a single counter:
249 * do not aggregate counts across CPUs in system-wide mode
250 */
251 static int read_counter(struct perf_evsel *counter)
252 {
253 int nthreads = thread_map__nr(evsel_list->threads);
254 int ncpus, cpu, thread;
255
256 if (target__has_cpu(&target) && !target__has_per_thread(&target))
257 ncpus = perf_evsel__nr_cpus(counter);
258 else
259 ncpus = 1;
260
261 if (!counter->supported)
262 return -ENOENT;
263
264 if (counter->system_wide)
265 nthreads = 1;
266
267 for (thread = 0; thread < nthreads; thread++) {
268 for (cpu = 0; cpu < ncpus; cpu++) {
269 struct perf_counts_values *count;
270
271 count = perf_counts(counter->counts, cpu, thread);
272
273 /*
274 * The leader's group read loads data into its group members
275 * (via perf_evsel__read_counter) and sets threir count->loaded.
276 */
277 if (!count->loaded &&
278 perf_evsel__read_counter(counter, cpu, thread)) {
279 counter->counts->scaled = -1;
280 perf_counts(counter->counts, cpu, thread)->ena = 0;
281 perf_counts(counter->counts, cpu, thread)->run = 0;
282 return -1;
283 }
284
285 count->loaded = false;
286
287 if (STAT_RECORD) {
288 if (perf_evsel__write_stat_event(counter, cpu, thread, count)) {
289 pr_err("failed to write stat event\n");
290 return -1;
291 }
292 }
293
294 if (verbose > 1) {
295 fprintf(stat_config.output,
296 "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
297 perf_evsel__name(counter),
298 cpu,
299 count->val, count->ena, count->run);
300 }
301 }
302 }
303
304 return 0;
305 }
306
307 static void read_counters(void)
308 {
309 struct perf_evsel *counter;
310 int ret;
311
312 evlist__for_each_entry(evsel_list, counter) {
313 ret = read_counter(counter);
314 if (ret)
315 pr_debug("failed to read counter %s\n", counter->name);
316
317 if (ret == 0 && perf_stat_process_counter(&stat_config, counter))
318 pr_warning("failed to process counter %s\n", counter->name);
319 }
320 }
321
322 static void process_interval(void)
323 {
324 struct timespec ts, rs;
325
326 read_counters();
327
328 clock_gettime(CLOCK_MONOTONIC, &ts);
329 diff_timespec(&rs, &ts, &ref_time);
330
331 if (STAT_RECORD) {
332 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
333 pr_err("failed to write stat round event\n");
334 }
335
336 init_stats(&walltime_nsecs_stats);
337 update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000);
338 print_counters(&rs, 0, NULL);
339 }
340
341 static void enable_counters(void)
342 {
343 if (stat_config.initial_delay)
344 usleep(stat_config.initial_delay * USEC_PER_MSEC);
345
346 /*
347 * We need to enable counters only if:
348 * - we don't have tracee (attaching to task or cpu)
349 * - we have initial delay configured
350 */
351 if (!target__none(&target) || stat_config.initial_delay)
352 perf_evlist__enable(evsel_list);
353 }
354
355 static void disable_counters(void)
356 {
357 /*
358 * If we don't have tracee (attaching to task or cpu), counters may
359 * still be running. To get accurate group ratios, we must stop groups
360 * from counting before reading their constituent counters.
361 */
362 if (!target__none(&target))
363 perf_evlist__disable(evsel_list);
364 }
365
366 static volatile int workload_exec_errno;
367
368 /*
369 * perf_evlist__prepare_workload will send a SIGUSR1
370 * if the fork fails, since we asked by setting its
371 * want_signal to true.
372 */
373 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
374 void *ucontext __maybe_unused)
375 {
376 workload_exec_errno = info->si_value.sival_int;
377 }
378
379 static bool perf_evsel__should_store_id(struct perf_evsel *counter)
380 {
381 return STAT_RECORD || counter->attr.read_format & PERF_FORMAT_ID;
382 }
383
384 static bool is_target_alive(struct target *_target,
385 struct thread_map *threads)
386 {
387 struct stat st;
388 int i;
389
390 if (!target__has_task(_target))
391 return true;
392
393 for (i = 0; i < threads->nr; i++) {
394 char path[PATH_MAX];
395
396 scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(),
397 threads->map[i].pid);
398
399 if (!stat(path, &st))
400 return true;
401 }
402
403 return false;
404 }
405
406 static int __run_perf_stat(int argc, const char **argv, int run_idx)
407 {
408 int interval = stat_config.interval;
409 int times = stat_config.times;
410 int timeout = stat_config.timeout;
411 char msg[BUFSIZ];
412 unsigned long long t0, t1;
413 struct perf_evsel *counter;
414 struct timespec ts;
415 size_t l;
416 int status = 0;
417 const bool forks = (argc > 0);
418 bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false;
419
420 if (interval) {
421 ts.tv_sec = interval / USEC_PER_MSEC;
422 ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC;
423 } else if (timeout) {
424 ts.tv_sec = timeout / USEC_PER_MSEC;
425 ts.tv_nsec = (timeout % USEC_PER_MSEC) * NSEC_PER_MSEC;
426 } else {
427 ts.tv_sec = 1;
428 ts.tv_nsec = 0;
429 }
430
431 if (forks) {
432 if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe,
433 workload_exec_failed_signal) < 0) {
434 perror("failed to prepare workload");
435 return -1;
436 }
437 child_pid = evsel_list->workload.pid;
438 }
439
440 if (group)
441 perf_evlist__set_leader(evsel_list);
442
443 evlist__for_each_entry(evsel_list, counter) {
444 try_again:
445 if (create_perf_stat_counter(counter, &stat_config, &target) < 0) {
446
447 /* Weak group failed. Reset the group. */
448 if ((errno == EINVAL || errno == EBADF) &&
449 counter->leader != counter &&
450 counter->weak_group) {
451 counter = perf_evlist__reset_weak_group(evsel_list, counter);
452 goto try_again;
453 }
454
455 /*
456 * PPC returns ENXIO for HW counters until 2.6.37
457 * (behavior changed with commit b0a873e).
458 */
459 if (errno == EINVAL || errno == ENOSYS ||
460 errno == ENOENT || errno == EOPNOTSUPP ||
461 errno == ENXIO) {
462 if (verbose > 0)
463 ui__warning("%s event is not supported by the kernel.\n",
464 perf_evsel__name(counter));
465 counter->supported = false;
466
467 if ((counter->leader != counter) ||
468 !(counter->leader->nr_members > 1))
469 continue;
470 } else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
471 if (verbose > 0)
472 ui__warning("%s\n", msg);
473 goto try_again;
474 } else if (target__has_per_thread(&target) &&
475 evsel_list->threads &&
476 evsel_list->threads->err_thread != -1) {
477 /*
478 * For global --per-thread case, skip current
479 * error thread.
480 */
481 if (!thread_map__remove(evsel_list->threads,
482 evsel_list->threads->err_thread)) {
483 evsel_list->threads->err_thread = -1;
484 goto try_again;
485 }
486 }
487
488 perf_evsel__open_strerror(counter, &target,
489 errno, msg, sizeof(msg));
490 ui__error("%s\n", msg);
491
492 if (child_pid != -1)
493 kill(child_pid, SIGTERM);
494
495 return -1;
496 }
497 counter->supported = true;
498
499 l = strlen(counter->unit);
500 if (l > stat_config.unit_width)
501 stat_config.unit_width = l;
502
503 if (perf_evsel__should_store_id(counter) &&
504 perf_evsel__store_ids(counter, evsel_list))
505 return -1;
506 }
507
508 if (perf_evlist__apply_filters(evsel_list, &counter)) {
509 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
510 counter->filter, perf_evsel__name(counter), errno,
511 str_error_r(errno, msg, sizeof(msg)));
512 return -1;
513 }
514
515 if (STAT_RECORD) {
516 int err, fd = perf_data__fd(&perf_stat.data);
517
518 if (is_pipe) {
519 err = perf_header__write_pipe(perf_data__fd(&perf_stat.data));
520 } else {
521 err = perf_session__write_header(perf_stat.session, evsel_list,
522 fd, false);
523 }
524
525 if (err < 0)
526 return err;
527
528 err = perf_stat_synthesize_config(&stat_config, NULL, evsel_list,
529 process_synthesized_event, is_pipe);
530 if (err < 0)
531 return err;
532 }
533
534 /*
535 * Enable counters and exec the command:
536 */
537 t0 = rdclock();
538 clock_gettime(CLOCK_MONOTONIC, &ref_time);
539
540 if (forks) {
541 perf_evlist__start_workload(evsel_list);
542 enable_counters();
543
544 if (interval || timeout) {
545 while (!waitpid(child_pid, &status, WNOHANG)) {
546 nanosleep(&ts, NULL);
547 if (timeout)
548 break;
549 process_interval();
550 if (interval_count && !(--times))
551 break;
552 }
553 }
554 if (child_pid != -1)
555 wait4(child_pid, &status, 0, &stat_config.ru_data);
556
557 if (workload_exec_errno) {
558 const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
559 pr_err("Workload failed: %s\n", emsg);
560 return -1;
561 }
562
563 if (WIFSIGNALED(status))
564 psignal(WTERMSIG(status), argv[0]);
565 } else {
566 enable_counters();
567 while (!done) {
568 nanosleep(&ts, NULL);
569 if (!is_target_alive(&target, evsel_list->threads))
570 break;
571 if (timeout)
572 break;
573 if (interval) {
574 process_interval();
575 if (interval_count && !(--times))
576 break;
577 }
578 }
579 }
580
581 disable_counters();
582
583 t1 = rdclock();
584
585 if (stat_config.walltime_run_table)
586 stat_config.walltime_run[run_idx] = t1 - t0;
587
588 update_stats(&walltime_nsecs_stats, t1 - t0);
589
590 /*
591 * Closing a group leader splits the group, and as we only disable
592 * group leaders, results in remaining events becoming enabled. To
593 * avoid arbitrary skew, we must read all counters before closing any
594 * group leaders.
595 */
596 read_counters();
597 perf_evlist__close(evsel_list);
598
599 return WEXITSTATUS(status);
600 }
601
602 static int run_perf_stat(int argc, const char **argv, int run_idx)
603 {
604 int ret;
605
606 if (pre_cmd) {
607 ret = system(pre_cmd);
608 if (ret)
609 return ret;
610 }
611
612 if (sync_run)
613 sync();
614
615 ret = __run_perf_stat(argc, argv, run_idx);
616 if (ret)
617 return ret;
618
619 if (post_cmd) {
620 ret = system(post_cmd);
621 if (ret)
622 return ret;
623 }
624
625 return ret;
626 }
627
628 static void print_counters(struct timespec *ts, int argc, const char **argv)
629 {
630 /* Do not print anything if we record to the pipe. */
631 if (STAT_RECORD && perf_stat.data.is_pipe)
632 return;
633
634 perf_evlist__print_counters(evsel_list, &stat_config, &target,
635 ts, argc, argv);
636 }
637
638 static volatile int signr = -1;
639
640 static void skip_signal(int signo)
641 {
642 if ((child_pid == -1) || stat_config.interval)
643 done = 1;
644
645 signr = signo;
646 /*
647 * render child_pid harmless
648 * won't send SIGTERM to a random
649 * process in case of race condition
650 * and fast PID recycling
651 */
652 child_pid = -1;
653 }
654
655 static void sig_atexit(void)
656 {
657 sigset_t set, oset;
658
659 /*
660 * avoid race condition with SIGCHLD handler
661 * in skip_signal() which is modifying child_pid
662 * goal is to avoid send SIGTERM to a random
663 * process
664 */
665 sigemptyset(&set);
666 sigaddset(&set, SIGCHLD);
667 sigprocmask(SIG_BLOCK, &set, &oset);
668
669 if (child_pid != -1)
670 kill(child_pid, SIGTERM);
671
672 sigprocmask(SIG_SETMASK, &oset, NULL);
673
674 if (signr == -1)
675 return;
676
677 signal(signr, SIG_DFL);
678 kill(getpid(), signr);
679 }
680
681 static int stat__set_big_num(const struct option *opt __maybe_unused,
682 const char *s __maybe_unused, int unset)
683 {
684 big_num_opt = unset ? 0 : 1;
685 return 0;
686 }
687
688 static int enable_metric_only(const struct option *opt __maybe_unused,
689 const char *s __maybe_unused, int unset)
690 {
691 force_metric_only = true;
692 stat_config.metric_only = !unset;
693 return 0;
694 }
695
696 static int parse_metric_groups(const struct option *opt,
697 const char *str,
698 int unset __maybe_unused)
699 {
700 return metricgroup__parse_groups(opt, str, &stat_config.metric_events);
701 }
702
703 static struct option stat_options[] = {
704 OPT_BOOLEAN('T', "transaction", &transaction_run,
705 "hardware transaction statistics"),
706 OPT_CALLBACK('e', "event", &evsel_list, "event",
707 "event selector. use 'perf list' to list available events",
708 parse_events_option),
709 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
710 "event filter", parse_filter),
711 OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit,
712 "child tasks do not inherit counters"),
713 OPT_STRING('p', "pid", &target.pid, "pid",
714 "stat events on existing process id"),
715 OPT_STRING('t', "tid", &target.tid, "tid",
716 "stat events on existing thread id"),
717 OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
718 "system-wide collection from all CPUs"),
719 OPT_BOOLEAN('g', "group", &group,
720 "put the counters into a counter group"),
721 OPT_BOOLEAN(0, "scale", &stat_config.scale,
722 "Use --no-scale to disable counter scaling for multiplexing"),
723 OPT_INCR('v', "verbose", &verbose,
724 "be more verbose (show counter open errors, etc)"),
725 OPT_INTEGER('r', "repeat", &stat_config.run_count,
726 "repeat command and print average + stddev (max: 100, forever: 0)"),
727 OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table,
728 "display details about each run (only with -r option)"),
729 OPT_BOOLEAN('n', "null", &stat_config.null_run,
730 "null run - dont start any counters"),
731 OPT_INCR('d', "detailed", &detailed_run,
732 "detailed run - start a lot of events"),
733 OPT_BOOLEAN('S', "sync", &sync_run,
734 "call sync() before starting a run"),
735 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
736 "print large numbers with thousands\' separators",
737 stat__set_big_num),
738 OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
739 "list of cpus to monitor in system-wide"),
740 OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
741 "disable CPU count aggregation", AGGR_NONE),
742 OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"),
743 OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator",
744 "print counts with custom separator"),
745 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
746 "monitor event in cgroup name only", parse_cgroups),
747 OPT_STRING('o', "output", &output_name, "file", "output file name"),
748 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
749 OPT_INTEGER(0, "log-fd", &output_fd,
750 "log output to fd, instead of stderr"),
751 OPT_STRING(0, "pre", &pre_cmd, "command",
752 "command to run prior to the measured command"),
753 OPT_STRING(0, "post", &post_cmd, "command",
754 "command to run after to the measured command"),
755 OPT_UINTEGER('I', "interval-print", &stat_config.interval,
756 "print counts at regular interval in ms "
757 "(overhead is possible for values <= 100ms)"),
758 OPT_INTEGER(0, "interval-count", &stat_config.times,
759 "print counts for fixed number of times"),
760 OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear,
761 "clear screen in between new interval"),
762 OPT_UINTEGER(0, "timeout", &stat_config.timeout,
763 "stop workload and print counts after a timeout period in ms (>= 10ms)"),
764 OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
765 "aggregate counts per processor socket", AGGR_SOCKET),
766 OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
767 "aggregate counts per physical processor core", AGGR_CORE),
768 OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
769 "aggregate counts per thread", AGGR_THREAD),
770 OPT_UINTEGER('D', "delay", &stat_config.initial_delay,
771 "ms to wait before starting measurement after program start"),
772 OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL,
773 "Only print computed metrics. No raw values", enable_metric_only),
774 OPT_BOOLEAN(0, "topdown", &topdown_run,
775 "measure topdown level 1 statistics"),
776 OPT_BOOLEAN(0, "smi-cost", &smi_cost,
777 "measure SMI cost"),
778 OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
779 "monitor specified metrics or metric groups (separated by ,)",
780 parse_metric_groups),
781 OPT_END()
782 };
783
784 static int perf_stat__get_socket(struct perf_stat_config *config __maybe_unused,
785 struct cpu_map *map, int cpu)
786 {
787 return cpu_map__get_socket(map, cpu, NULL);
788 }
789
790 static int perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
791 struct cpu_map *map, int cpu)
792 {
793 return cpu_map__get_core(map, cpu, NULL);
794 }
795
796 static int cpu_map__get_max(struct cpu_map *map)
797 {
798 int i, max = -1;
799
800 for (i = 0; i < map->nr; i++) {
801 if (map->map[i] > max)
802 max = map->map[i];
803 }
804
805 return max;
806 }
807
808 static int perf_stat__get_aggr(struct perf_stat_config *config,
809 aggr_get_id_t get_id, struct cpu_map *map, int idx)
810 {
811 int cpu;
812
813 if (idx >= map->nr)
814 return -1;
815
816 cpu = map->map[idx];
817
818 if (config->cpus_aggr_map->map[cpu] == -1)
819 config->cpus_aggr_map->map[cpu] = get_id(config, map, idx);
820
821 return config->cpus_aggr_map->map[cpu];
822 }
823
824 static int perf_stat__get_socket_cached(struct perf_stat_config *config,
825 struct cpu_map *map, int idx)
826 {
827 return perf_stat__get_aggr(config, perf_stat__get_socket, map, idx);
828 }
829
830 static int perf_stat__get_core_cached(struct perf_stat_config *config,
831 struct cpu_map *map, int idx)
832 {
833 return perf_stat__get_aggr(config, perf_stat__get_core, map, idx);
834 }
835
836 static int perf_stat_init_aggr_mode(void)
837 {
838 int nr;
839
840 switch (stat_config.aggr_mode) {
841 case AGGR_SOCKET:
842 if (cpu_map__build_socket_map(evsel_list->cpus, &stat_config.aggr_map)) {
843 perror("cannot build socket map");
844 return -1;
845 }
846 stat_config.aggr_get_id = perf_stat__get_socket_cached;
847 break;
848 case AGGR_CORE:
849 if (cpu_map__build_core_map(evsel_list->cpus, &stat_config.aggr_map)) {
850 perror("cannot build core map");
851 return -1;
852 }
853 stat_config.aggr_get_id = perf_stat__get_core_cached;
854 break;
855 case AGGR_NONE:
856 case AGGR_GLOBAL:
857 case AGGR_THREAD:
858 case AGGR_UNSET:
859 default:
860 break;
861 }
862
863 /*
864 * The evsel_list->cpus is the base we operate on,
865 * taking the highest cpu number to be the size of
866 * the aggregation translate cpumap.
867 */
868 nr = cpu_map__get_max(evsel_list->cpus);
869 stat_config.cpus_aggr_map = cpu_map__empty_new(nr + 1);
870 return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
871 }
872
873 static void perf_stat__exit_aggr_mode(void)
874 {
875 cpu_map__put(stat_config.aggr_map);
876 cpu_map__put(stat_config.cpus_aggr_map);
877 stat_config.aggr_map = NULL;
878 stat_config.cpus_aggr_map = NULL;
879 }
880
881 static inline int perf_env__get_cpu(struct perf_env *env, struct cpu_map *map, int idx)
882 {
883 int cpu;
884
885 if (idx > map->nr)
886 return -1;
887
888 cpu = map->map[idx];
889
890 if (cpu >= env->nr_cpus_avail)
891 return -1;
892
893 return cpu;
894 }
895
896 static int perf_env__get_socket(struct cpu_map *map, int idx, void *data)
897 {
898 struct perf_env *env = data;
899 int cpu = perf_env__get_cpu(env, map, idx);
900
901 return cpu == -1 ? -1 : env->cpu[cpu].socket_id;
902 }
903
904 static int perf_env__get_core(struct cpu_map *map, int idx, void *data)
905 {
906 struct perf_env *env = data;
907 int core = -1, cpu = perf_env__get_cpu(env, map, idx);
908
909 if (cpu != -1) {
910 int socket_id = env->cpu[cpu].socket_id;
911
912 /*
913 * Encode socket in upper 16 bits
914 * core_id is relative to socket, and
915 * we need a global id. So we combine
916 * socket + core id.
917 */
918 core = (socket_id << 16) | (env->cpu[cpu].core_id & 0xffff);
919 }
920
921 return core;
922 }
923
924 static int perf_env__build_socket_map(struct perf_env *env, struct cpu_map *cpus,
925 struct cpu_map **sockp)
926 {
927 return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
928 }
929
930 static int perf_env__build_core_map(struct perf_env *env, struct cpu_map *cpus,
931 struct cpu_map **corep)
932 {
933 return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
934 }
935
936 static int perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused,
937 struct cpu_map *map, int idx)
938 {
939 return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
940 }
941
942 static int perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused,
943 struct cpu_map *map, int idx)
944 {
945 return perf_env__get_core(map, idx, &perf_stat.session->header.env);
946 }
947
948 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
949 {
950 struct perf_env *env = &st->session->header.env;
951
952 switch (stat_config.aggr_mode) {
953 case AGGR_SOCKET:
954 if (perf_env__build_socket_map(env, evsel_list->cpus, &stat_config.aggr_map)) {
955 perror("cannot build socket map");
956 return -1;
957 }
958 stat_config.aggr_get_id = perf_stat__get_socket_file;
959 break;
960 case AGGR_CORE:
961 if (perf_env__build_core_map(env, evsel_list->cpus, &stat_config.aggr_map)) {
962 perror("cannot build core map");
963 return -1;
964 }
965 stat_config.aggr_get_id = perf_stat__get_core_file;
966 break;
967 case AGGR_NONE:
968 case AGGR_GLOBAL:
969 case AGGR_THREAD:
970 case AGGR_UNSET:
971 default:
972 break;
973 }
974
975 return 0;
976 }
977
978 static int topdown_filter_events(const char **attr, char **str, bool use_group)
979 {
980 int off = 0;
981 int i;
982 int len = 0;
983 char *s;
984
985 for (i = 0; attr[i]; i++) {
986 if (pmu_have_event("cpu", attr[i])) {
987 len += strlen(attr[i]) + 1;
988 attr[i - off] = attr[i];
989 } else
990 off++;
991 }
992 attr[i - off] = NULL;
993
994 *str = malloc(len + 1 + 2);
995 if (!*str)
996 return -1;
997 s = *str;
998 if (i - off == 0) {
999 *s = 0;
1000 return 0;
1001 }
1002 if (use_group)
1003 *s++ = '{';
1004 for (i = 0; attr[i]; i++) {
1005 strcpy(s, attr[i]);
1006 s += strlen(s);
1007 *s++ = ',';
1008 }
1009 if (use_group) {
1010 s[-1] = '}';
1011 *s = 0;
1012 } else
1013 s[-1] = 0;
1014 return 0;
1015 }
1016
1017 __weak bool arch_topdown_check_group(bool *warn)
1018 {
1019 *warn = false;
1020 return false;
1021 }
1022
1023 __weak void arch_topdown_group_warn(void)
1024 {
1025 }
1026
1027 /*
1028 * Add default attributes, if there were no attributes specified or
1029 * if -d/--detailed, -d -d or -d -d -d is used:
1030 */
1031 static int add_default_attributes(void)
1032 {
1033 int err;
1034 struct perf_event_attr default_attrs0[] = {
1035
1036 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
1037 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
1038 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
1039 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
1040
1041 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
1042 };
1043 struct perf_event_attr frontend_attrs[] = {
1044 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1045 };
1046 struct perf_event_attr backend_attrs[] = {
1047 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
1048 };
1049 struct perf_event_attr default_attrs1[] = {
1050 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
1051 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
1052 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
1053
1054 };
1055
1056 /*
1057 * Detailed stats (-d), covering the L1 and last level data caches:
1058 */
1059 struct perf_event_attr detailed_attrs[] = {
1060
1061 { .type = PERF_TYPE_HW_CACHE,
1062 .config =
1063 PERF_COUNT_HW_CACHE_L1D << 0 |
1064 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1065 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1066
1067 { .type = PERF_TYPE_HW_CACHE,
1068 .config =
1069 PERF_COUNT_HW_CACHE_L1D << 0 |
1070 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1071 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1072
1073 { .type = PERF_TYPE_HW_CACHE,
1074 .config =
1075 PERF_COUNT_HW_CACHE_LL << 0 |
1076 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1077 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1078
1079 { .type = PERF_TYPE_HW_CACHE,
1080 .config =
1081 PERF_COUNT_HW_CACHE_LL << 0 |
1082 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1083 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1084 };
1085
1086 /*
1087 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1088 */
1089 struct perf_event_attr very_detailed_attrs[] = {
1090
1091 { .type = PERF_TYPE_HW_CACHE,
1092 .config =
1093 PERF_COUNT_HW_CACHE_L1I << 0 |
1094 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1095 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1096
1097 { .type = PERF_TYPE_HW_CACHE,
1098 .config =
1099 PERF_COUNT_HW_CACHE_L1I << 0 |
1100 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1101 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1102
1103 { .type = PERF_TYPE_HW_CACHE,
1104 .config =
1105 PERF_COUNT_HW_CACHE_DTLB << 0 |
1106 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1107 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1108
1109 { .type = PERF_TYPE_HW_CACHE,
1110 .config =
1111 PERF_COUNT_HW_CACHE_DTLB << 0 |
1112 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1113 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1114
1115 { .type = PERF_TYPE_HW_CACHE,
1116 .config =
1117 PERF_COUNT_HW_CACHE_ITLB << 0 |
1118 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1119 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1120
1121 { .type = PERF_TYPE_HW_CACHE,
1122 .config =
1123 PERF_COUNT_HW_CACHE_ITLB << 0 |
1124 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1125 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1126
1127 };
1128
1129 /*
1130 * Very, very detailed stats (-d -d -d), adding prefetch events:
1131 */
1132 struct perf_event_attr very_very_detailed_attrs[] = {
1133
1134 { .type = PERF_TYPE_HW_CACHE,
1135 .config =
1136 PERF_COUNT_HW_CACHE_L1D << 0 |
1137 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1138 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1139
1140 { .type = PERF_TYPE_HW_CACHE,
1141 .config =
1142 PERF_COUNT_HW_CACHE_L1D << 0 |
1143 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1144 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1145 };
1146 struct parse_events_error errinfo;
1147
1148 /* Set attrs if no event is selected and !null_run: */
1149 if (stat_config.null_run)
1150 return 0;
1151
1152 if (transaction_run) {
1153 /* Handle -T as -M transaction. Once platform specific metrics
1154 * support has been added to the json files, all archictures
1155 * will use this approach. To determine transaction support
1156 * on an architecture test for such a metric name.
1157 */
1158 if (metricgroup__has_metric("transaction")) {
1159 struct option opt = { .value = &evsel_list };
1160
1161 return metricgroup__parse_groups(&opt, "transaction",
1162 &stat_config.metric_events);
1163 }
1164
1165 if (pmu_have_event("cpu", "cycles-ct") &&
1166 pmu_have_event("cpu", "el-start"))
1167 err = parse_events(evsel_list, transaction_attrs,
1168 &errinfo);
1169 else
1170 err = parse_events(evsel_list,
1171 transaction_limited_attrs,
1172 &errinfo);
1173 if (err) {
1174 fprintf(stderr, "Cannot set up transaction events\n");
1175 parse_events_print_error(&errinfo, transaction_attrs);
1176 return -1;
1177 }
1178 return 0;
1179 }
1180
1181 if (smi_cost) {
1182 int smi;
1183
1184 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
1185 fprintf(stderr, "freeze_on_smi is not supported.\n");
1186 return -1;
1187 }
1188
1189 if (!smi) {
1190 if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) {
1191 fprintf(stderr, "Failed to set freeze_on_smi.\n");
1192 return -1;
1193 }
1194 smi_reset = true;
1195 }
1196
1197 if (pmu_have_event("msr", "aperf") &&
1198 pmu_have_event("msr", "smi")) {
1199 if (!force_metric_only)
1200 stat_config.metric_only = true;
1201 err = parse_events(evsel_list, smi_cost_attrs, &errinfo);
1202 } else {
1203 fprintf(stderr, "To measure SMI cost, it needs "
1204 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n");
1205 parse_events_print_error(&errinfo, smi_cost_attrs);
1206 return -1;
1207 }
1208 if (err) {
1209 fprintf(stderr, "Cannot set up SMI cost events\n");
1210 return -1;
1211 }
1212 return 0;
1213 }
1214
1215 if (topdown_run) {
1216 char *str = NULL;
1217 bool warn = false;
1218
1219 if (stat_config.aggr_mode != AGGR_GLOBAL &&
1220 stat_config.aggr_mode != AGGR_CORE) {
1221 pr_err("top down event configuration requires --per-core mode\n");
1222 return -1;
1223 }
1224 stat_config.aggr_mode = AGGR_CORE;
1225 if (nr_cgroups || !target__has_cpu(&target)) {
1226 pr_err("top down event configuration requires system-wide mode (-a)\n");
1227 return -1;
1228 }
1229
1230 if (!force_metric_only)
1231 stat_config.metric_only = true;
1232 if (topdown_filter_events(topdown_attrs, &str,
1233 arch_topdown_check_group(&warn)) < 0) {
1234 pr_err("Out of memory\n");
1235 return -1;
1236 }
1237 if (topdown_attrs[0] && str) {
1238 if (warn)
1239 arch_topdown_group_warn();
1240 err = parse_events(evsel_list, str, &errinfo);
1241 if (err) {
1242 fprintf(stderr,
1243 "Cannot set up top down events %s: %d\n",
1244 str, err);
1245 free(str);
1246 parse_events_print_error(&errinfo, str);
1247 return -1;
1248 }
1249 } else {
1250 fprintf(stderr, "System does not support topdown\n");
1251 return -1;
1252 }
1253 free(str);
1254 }
1255
1256 if (!evsel_list->nr_entries) {
1257 if (target__has_cpu(&target))
1258 default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
1259
1260 if (perf_evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
1261 return -1;
1262 if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
1263 if (perf_evlist__add_default_attrs(evsel_list,
1264 frontend_attrs) < 0)
1265 return -1;
1266 }
1267 if (pmu_have_event("cpu", "stalled-cycles-backend")) {
1268 if (perf_evlist__add_default_attrs(evsel_list,
1269 backend_attrs) < 0)
1270 return -1;
1271 }
1272 if (perf_evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
1273 return -1;
1274 }
1275
1276 /* Detailed events get appended to the event list: */
1277
1278 if (detailed_run < 1)
1279 return 0;
1280
1281 /* Append detailed run extra attributes: */
1282 if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1283 return -1;
1284
1285 if (detailed_run < 2)
1286 return 0;
1287
1288 /* Append very detailed run extra attributes: */
1289 if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1290 return -1;
1291
1292 if (detailed_run < 3)
1293 return 0;
1294
1295 /* Append very, very detailed run extra attributes: */
1296 return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1297 }
1298
1299 static const char * const stat_record_usage[] = {
1300 "perf stat record [<options>]",
1301 NULL,
1302 };
1303
1304 static void init_features(struct perf_session *session)
1305 {
1306 int feat;
1307
1308 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
1309 perf_header__set_feat(&session->header, feat);
1310
1311 perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT);
1312 perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
1313 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
1314 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
1315 perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
1316 }
1317
1318 static int __cmd_record(int argc, const char **argv)
1319 {
1320 struct perf_session *session;
1321 struct perf_data *data = &perf_stat.data;
1322
1323 argc = parse_options(argc, argv, stat_options, stat_record_usage,
1324 PARSE_OPT_STOP_AT_NON_OPTION);
1325
1326 if (output_name)
1327 data->path = output_name;
1328
1329 if (stat_config.run_count != 1 || forever) {
1330 pr_err("Cannot use -r option with perf stat record.\n");
1331 return -1;
1332 }
1333
1334 session = perf_session__new(data, false, NULL);
1335 if (session == NULL) {
1336 pr_err("Perf session creation failed.\n");
1337 return -1;
1338 }
1339
1340 init_features(session);
1341
1342 session->evlist = evsel_list;
1343 perf_stat.session = session;
1344 perf_stat.record = true;
1345 return argc;
1346 }
1347
1348 static int process_stat_round_event(struct perf_session *session,
1349 union perf_event *event)
1350 {
1351 struct stat_round_event *stat_round = &event->stat_round;
1352 struct perf_evsel *counter;
1353 struct timespec tsh, *ts = NULL;
1354 const char **argv = session->header.env.cmdline_argv;
1355 int argc = session->header.env.nr_cmdline;
1356
1357 evlist__for_each_entry(evsel_list, counter)
1358 perf_stat_process_counter(&stat_config, counter);
1359
1360 if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
1361 update_stats(&walltime_nsecs_stats, stat_round->time);
1362
1363 if (stat_config.interval && stat_round->time) {
1364 tsh.tv_sec = stat_round->time / NSEC_PER_SEC;
1365 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
1366 ts = &tsh;
1367 }
1368
1369 print_counters(ts, argc, argv);
1370 return 0;
1371 }
1372
1373 static
1374 int process_stat_config_event(struct perf_session *session,
1375 union perf_event *event)
1376 {
1377 struct perf_tool *tool = session->tool;
1378 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1379
1380 perf_event__read_stat_config(&stat_config, &event->stat_config);
1381
1382 if (cpu_map__empty(st->cpus)) {
1383 if (st->aggr_mode != AGGR_UNSET)
1384 pr_warning("warning: processing task data, aggregation mode not set\n");
1385 return 0;
1386 }
1387
1388 if (st->aggr_mode != AGGR_UNSET)
1389 stat_config.aggr_mode = st->aggr_mode;
1390
1391 if (perf_stat.data.is_pipe)
1392 perf_stat_init_aggr_mode();
1393 else
1394 perf_stat_init_aggr_mode_file(st);
1395
1396 return 0;
1397 }
1398
1399 static int set_maps(struct perf_stat *st)
1400 {
1401 if (!st->cpus || !st->threads)
1402 return 0;
1403
1404 if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
1405 return -EINVAL;
1406
1407 perf_evlist__set_maps(evsel_list, st->cpus, st->threads);
1408
1409 if (perf_evlist__alloc_stats(evsel_list, true))
1410 return -ENOMEM;
1411
1412 st->maps_allocated = true;
1413 return 0;
1414 }
1415
1416 static
1417 int process_thread_map_event(struct perf_session *session,
1418 union perf_event *event)
1419 {
1420 struct perf_tool *tool = session->tool;
1421 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1422
1423 if (st->threads) {
1424 pr_warning("Extra thread map event, ignoring.\n");
1425 return 0;
1426 }
1427
1428 st->threads = thread_map__new_event(&event->thread_map);
1429 if (!st->threads)
1430 return -ENOMEM;
1431
1432 return set_maps(st);
1433 }
1434
1435 static
1436 int process_cpu_map_event(struct perf_session *session,
1437 union perf_event *event)
1438 {
1439 struct perf_tool *tool = session->tool;
1440 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1441 struct cpu_map *cpus;
1442
1443 if (st->cpus) {
1444 pr_warning("Extra cpu map event, ignoring.\n");
1445 return 0;
1446 }
1447
1448 cpus = cpu_map__new_data(&event->cpu_map.data);
1449 if (!cpus)
1450 return -ENOMEM;
1451
1452 st->cpus = cpus;
1453 return set_maps(st);
1454 }
1455
1456 static int runtime_stat_new(struct perf_stat_config *config, int nthreads)
1457 {
1458 int i;
1459
1460 config->stats = calloc(nthreads, sizeof(struct runtime_stat));
1461 if (!config->stats)
1462 return -1;
1463
1464 config->stats_num = nthreads;
1465
1466 for (i = 0; i < nthreads; i++)
1467 runtime_stat__init(&config->stats[i]);
1468
1469 return 0;
1470 }
1471
1472 static void runtime_stat_delete(struct perf_stat_config *config)
1473 {
1474 int i;
1475
1476 if (!config->stats)
1477 return;
1478
1479 for (i = 0; i < config->stats_num; i++)
1480 runtime_stat__exit(&config->stats[i]);
1481
1482 free(config->stats);
1483 }
1484
1485 static const char * const stat_report_usage[] = {
1486 "perf stat report [<options>]",
1487 NULL,
1488 };
1489
1490 static struct perf_stat perf_stat = {
1491 .tool = {
1492 .attr = perf_event__process_attr,
1493 .event_update = perf_event__process_event_update,
1494 .thread_map = process_thread_map_event,
1495 .cpu_map = process_cpu_map_event,
1496 .stat_config = process_stat_config_event,
1497 .stat = perf_event__process_stat_event,
1498 .stat_round = process_stat_round_event,
1499 },
1500 .aggr_mode = AGGR_UNSET,
1501 };
1502
1503 static int __cmd_report(int argc, const char **argv)
1504 {
1505 struct perf_session *session;
1506 const struct option options[] = {
1507 OPT_STRING('i', "input", &input_name, "file", "input file name"),
1508 OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
1509 "aggregate counts per processor socket", AGGR_SOCKET),
1510 OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
1511 "aggregate counts per physical processor core", AGGR_CORE),
1512 OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
1513 "disable CPU count aggregation", AGGR_NONE),
1514 OPT_END()
1515 };
1516 struct stat st;
1517 int ret;
1518
1519 argc = parse_options(argc, argv, options, stat_report_usage, 0);
1520
1521 if (!input_name || !strlen(input_name)) {
1522 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
1523 input_name = "-";
1524 else
1525 input_name = "perf.data";
1526 }
1527
1528 perf_stat.data.path = input_name;
1529 perf_stat.data.mode = PERF_DATA_MODE_READ;
1530
1531 session = perf_session__new(&perf_stat.data, false, &perf_stat.tool);
1532 if (session == NULL)
1533 return -1;
1534
1535 perf_stat.session = session;
1536 stat_config.output = stderr;
1537 evsel_list = session->evlist;
1538
1539 ret = perf_session__process_events(session);
1540 if (ret)
1541 return ret;
1542
1543 perf_session__delete(session);
1544 return 0;
1545 }
1546
1547 static void setup_system_wide(int forks)
1548 {
1549 /*
1550 * Make system wide (-a) the default target if
1551 * no target was specified and one of following
1552 * conditions is met:
1553 *
1554 * - there's no workload specified
1555 * - there is workload specified but all requested
1556 * events are system wide events
1557 */
1558 if (!target__none(&target))
1559 return;
1560
1561 if (!forks)
1562 target.system_wide = true;
1563 else {
1564 struct perf_evsel *counter;
1565
1566 evlist__for_each_entry(evsel_list, counter) {
1567 if (!counter->system_wide)
1568 return;
1569 }
1570
1571 if (evsel_list->nr_entries)
1572 target.system_wide = true;
1573 }
1574 }
1575
1576 int cmd_stat(int argc, const char **argv)
1577 {
1578 const char * const stat_usage[] = {
1579 "perf stat [<options>] [<command>]",
1580 NULL
1581 };
1582 int status = -EINVAL, run_idx;
1583 const char *mode;
1584 FILE *output = stderr;
1585 unsigned int interval, timeout;
1586 const char * const stat_subcommands[] = { "record", "report" };
1587
1588 setlocale(LC_ALL, "");
1589
1590 evsel_list = perf_evlist__new();
1591 if (evsel_list == NULL)
1592 return -ENOMEM;
1593
1594 parse_events__shrink_config_terms();
1595
1596 /* String-parsing callback-based options would segfault when negated */
1597 set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG);
1598 set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG);
1599 set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG);
1600
1601 argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
1602 (const char **) stat_usage,
1603 PARSE_OPT_STOP_AT_NON_OPTION);
1604 perf_stat__collect_metric_expr(evsel_list);
1605 perf_stat__init_shadow_stats();
1606
1607 if (stat_config.csv_sep) {
1608 stat_config.csv_output = true;
1609 if (!strcmp(stat_config.csv_sep, "\\t"))
1610 stat_config.csv_sep = "\t";
1611 } else
1612 stat_config.csv_sep = DEFAULT_SEPARATOR;
1613
1614 if (argc && !strncmp(argv[0], "rec", 3)) {
1615 argc = __cmd_record(argc, argv);
1616 if (argc < 0)
1617 return -1;
1618 } else if (argc && !strncmp(argv[0], "rep", 3))
1619 return __cmd_report(argc, argv);
1620
1621 interval = stat_config.interval;
1622 timeout = stat_config.timeout;
1623
1624 /*
1625 * For record command the -o is already taken care of.
1626 */
1627 if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
1628 output = NULL;
1629
1630 if (output_name && output_fd) {
1631 fprintf(stderr, "cannot use both --output and --log-fd\n");
1632 parse_options_usage(stat_usage, stat_options, "o", 1);
1633 parse_options_usage(NULL, stat_options, "log-fd", 0);
1634 goto out;
1635 }
1636
1637 if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) {
1638 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
1639 goto out;
1640 }
1641
1642 if (stat_config.metric_only && stat_config.run_count > 1) {
1643 fprintf(stderr, "--metric-only is not supported with -r\n");
1644 goto out;
1645 }
1646
1647 if (stat_config.walltime_run_table && stat_config.run_count <= 1) {
1648 fprintf(stderr, "--table is only supported with -r\n");
1649 parse_options_usage(stat_usage, stat_options, "r", 1);
1650 parse_options_usage(NULL, stat_options, "table", 0);
1651 goto out;
1652 }
1653
1654 if (output_fd < 0) {
1655 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1656 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
1657 goto out;
1658 }
1659
1660 if (!output) {
1661 struct timespec tm;
1662 mode = append_file ? "a" : "w";
1663
1664 output = fopen(output_name, mode);
1665 if (!output) {
1666 perror("failed to create output file");
1667 return -1;
1668 }
1669 clock_gettime(CLOCK_REALTIME, &tm);
1670 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1671 } else if (output_fd > 0) {
1672 mode = append_file ? "a" : "w";
1673 output = fdopen(output_fd, mode);
1674 if (!output) {
1675 perror("Failed opening logfd");
1676 return -errno;
1677 }
1678 }
1679
1680 stat_config.output = output;
1681
1682 /*
1683 * let the spreadsheet do the pretty-printing
1684 */
1685 if (stat_config.csv_output) {
1686 /* User explicitly passed -B? */
1687 if (big_num_opt == 1) {
1688 fprintf(stderr, "-B option not supported with -x\n");
1689 parse_options_usage(stat_usage, stat_options, "B", 1);
1690 parse_options_usage(NULL, stat_options, "x", 1);
1691 goto out;
1692 } else /* Nope, so disable big number formatting */
1693 stat_config.big_num = false;
1694 } else if (big_num_opt == 0) /* User passed --no-big-num */
1695 stat_config.big_num = false;
1696
1697 setup_system_wide(argc);
1698
1699 /*
1700 * Display user/system times only for single
1701 * run and when there's specified tracee.
1702 */
1703 if ((stat_config.run_count == 1) && target__none(&target))
1704 stat_config.ru_display = true;
1705
1706 if (stat_config.run_count < 0) {
1707 pr_err("Run count must be a positive number\n");
1708 parse_options_usage(stat_usage, stat_options, "r", 1);
1709 goto out;
1710 } else if (stat_config.run_count == 0) {
1711 forever = true;
1712 stat_config.run_count = 1;
1713 }
1714
1715 if (stat_config.walltime_run_table) {
1716 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0]));
1717 if (!stat_config.walltime_run) {
1718 pr_err("failed to setup -r option");
1719 goto out;
1720 }
1721 }
1722
1723 if ((stat_config.aggr_mode == AGGR_THREAD) &&
1724 !target__has_task(&target)) {
1725 if (!target.system_wide || target.cpu_list) {
1726 fprintf(stderr, "The --per-thread option is only "
1727 "available when monitoring via -p -t -a "
1728 "options or only --per-thread.\n");
1729 parse_options_usage(NULL, stat_options, "p", 1);
1730 parse_options_usage(NULL, stat_options, "t", 1);
1731 goto out;
1732 }
1733 }
1734
1735 /*
1736 * no_aggr, cgroup are for system-wide only
1737 * --per-thread is aggregated per thread, we dont mix it with cpu mode
1738 */
1739 if (((stat_config.aggr_mode != AGGR_GLOBAL &&
1740 stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
1741 !target__has_cpu(&target)) {
1742 fprintf(stderr, "both cgroup and no-aggregation "
1743 "modes only available in system-wide mode\n");
1744
1745 parse_options_usage(stat_usage, stat_options, "G", 1);
1746 parse_options_usage(NULL, stat_options, "A", 1);
1747 parse_options_usage(NULL, stat_options, "a", 1);
1748 goto out;
1749 }
1750
1751 if (add_default_attributes())
1752 goto out;
1753
1754 target__validate(&target);
1755
1756 if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
1757 target.per_thread = true;
1758
1759 if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1760 if (target__has_task(&target)) {
1761 pr_err("Problems finding threads of monitor\n");
1762 parse_options_usage(stat_usage, stat_options, "p", 1);
1763 parse_options_usage(NULL, stat_options, "t", 1);
1764 } else if (target__has_cpu(&target)) {
1765 perror("failed to parse CPUs map");
1766 parse_options_usage(stat_usage, stat_options, "C", 1);
1767 parse_options_usage(NULL, stat_options, "a", 1);
1768 }
1769 goto out;
1770 }
1771
1772 /*
1773 * Initialize thread_map with comm names,
1774 * so we could print it out on output.
1775 */
1776 if (stat_config.aggr_mode == AGGR_THREAD) {
1777 thread_map__read_comms(evsel_list->threads);
1778 if (target.system_wide) {
1779 if (runtime_stat_new(&stat_config,
1780 thread_map__nr(evsel_list->threads))) {
1781 goto out;
1782 }
1783 }
1784 }
1785
1786 if (stat_config.times && interval)
1787 interval_count = true;
1788 else if (stat_config.times && !interval) {
1789 pr_err("interval-count option should be used together with "
1790 "interval-print.\n");
1791 parse_options_usage(stat_usage, stat_options, "interval-count", 0);
1792 parse_options_usage(stat_usage, stat_options, "I", 1);
1793 goto out;
1794 }
1795
1796 if (timeout && timeout < 100) {
1797 if (timeout < 10) {
1798 pr_err("timeout must be >= 10ms.\n");
1799 parse_options_usage(stat_usage, stat_options, "timeout", 0);
1800 goto out;
1801 } else
1802 pr_warning("timeout < 100ms. "
1803 "The overhead percentage could be high in some cases. "
1804 "Please proceed with caution.\n");
1805 }
1806 if (timeout && interval) {
1807 pr_err("timeout option is not supported with interval-print.\n");
1808 parse_options_usage(stat_usage, stat_options, "timeout", 0);
1809 parse_options_usage(stat_usage, stat_options, "I", 1);
1810 goto out;
1811 }
1812
1813 if (perf_evlist__alloc_stats(evsel_list, interval))
1814 goto out;
1815
1816 if (perf_stat_init_aggr_mode())
1817 goto out;
1818
1819 /*
1820 * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
1821 * while avoiding that older tools show confusing messages.
1822 *
1823 * However for pipe sessions we need to keep it zero,
1824 * because script's perf_evsel__check_attr is triggered
1825 * by attr->sample_type != 0, and we can't run it on
1826 * stat sessions.
1827 */
1828 stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe);
1829
1830 /*
1831 * We dont want to block the signals - that would cause
1832 * child tasks to inherit that and Ctrl-C would not work.
1833 * What we want is for Ctrl-C to work in the exec()-ed
1834 * task, but being ignored by perf stat itself:
1835 */
1836 atexit(sig_atexit);
1837 if (!forever)
1838 signal(SIGINT, skip_signal);
1839 signal(SIGCHLD, skip_signal);
1840 signal(SIGALRM, skip_signal);
1841 signal(SIGABRT, skip_signal);
1842
1843 status = 0;
1844 for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) {
1845 if (stat_config.run_count != 1 && verbose > 0)
1846 fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1847 run_idx + 1);
1848
1849 status = run_perf_stat(argc, argv, run_idx);
1850 if (forever && status != -1) {
1851 print_counters(NULL, argc, argv);
1852 perf_stat__reset_stats();
1853 }
1854 }
1855
1856 if (!forever && status != -1 && !interval)
1857 print_counters(NULL, argc, argv);
1858
1859 if (STAT_RECORD) {
1860 /*
1861 * We synthesize the kernel mmap record just so that older tools
1862 * don't emit warnings about not being able to resolve symbols
1863 * due to /proc/sys/kernel/kptr_restrict settings and instear provide
1864 * a saner message about no samples being in the perf.data file.
1865 *
1866 * This also serves to suppress a warning about f_header.data.size == 0
1867 * in header.c at the moment 'perf stat record' gets introduced, which
1868 * is not really needed once we start adding the stat specific PERF_RECORD_
1869 * records, but the need to suppress the kptr_restrict messages in older
1870 * tools remain -acme
1871 */
1872 int fd = perf_data__fd(&perf_stat.data);
1873 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
1874 process_synthesized_event,
1875 &perf_stat.session->machines.host);
1876 if (err) {
1877 pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
1878 "older tools may produce warnings about this file\n.");
1879 }
1880
1881 if (!interval) {
1882 if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
1883 pr_err("failed to write stat round event\n");
1884 }
1885
1886 if (!perf_stat.data.is_pipe) {
1887 perf_stat.session->header.data_size += perf_stat.bytes_written;
1888 perf_session__write_header(perf_stat.session, evsel_list, fd, true);
1889 }
1890
1891 perf_session__delete(perf_stat.session);
1892 }
1893
1894 perf_stat__exit_aggr_mode();
1895 perf_evlist__free_stats(evsel_list);
1896 out:
1897 free(stat_config.walltime_run);
1898
1899 if (smi_cost && smi_reset)
1900 sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
1901
1902 perf_evlist__delete(evsel_list);
1903
1904 runtime_stat_delete(&stat_config);
1905
1906 return status;
1907 }
Linux with added FPC-III support