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regulator: s2mps11: Adjust supported buck voltages to real values
[linux/fpc-iii.git] / tools / perf / builtin-stat.c
blob7b8f09b0b8bf7139463fb8d8736346c73f3cfe65
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('c', "scale", &stat_config.scale, "scale/normalize counters"),
722 OPT_INCR('v', "verbose", &verbose,
723 "be more verbose (show counter open errors, etc)"),
724 OPT_INTEGER('r', "repeat", &stat_config.run_count,
725 "repeat command and print average + stddev (max: 100, forever: 0)"),
726 OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table,
727 "display details about each run (only with -r option)"),
728 OPT_BOOLEAN('n', "null", &stat_config.null_run,
729 "null run - dont start any counters"),
730 OPT_INCR('d', "detailed", &detailed_run,
731 "detailed run - start a lot of events"),
732 OPT_BOOLEAN('S', "sync", &sync_run,
733 "call sync() before starting a run"),
734 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
735 "print large numbers with thousands\' separators",
736 stat__set_big_num),
737 OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
738 "list of cpus to monitor in system-wide"),
739 OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
740 "disable CPU count aggregation", AGGR_NONE),
741 OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"),
742 OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator",
743 "print counts with custom separator"),
744 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
745 "monitor event in cgroup name only", parse_cgroups),
746 OPT_STRING('o', "output", &output_name, "file", "output file name"),
747 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
748 OPT_INTEGER(0, "log-fd", &output_fd,
749 "log output to fd, instead of stderr"),
750 OPT_STRING(0, "pre", &pre_cmd, "command",
751 "command to run prior to the measured command"),
752 OPT_STRING(0, "post", &post_cmd, "command",
753 "command to run after to the measured command"),
754 OPT_UINTEGER('I', "interval-print", &stat_config.interval,
755 "print counts at regular interval in ms "
756 "(overhead is possible for values <= 100ms)"),
757 OPT_INTEGER(0, "interval-count", &stat_config.times,
758 "print counts for fixed number of times"),
759 OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear,
760 "clear screen in between new interval"),
761 OPT_UINTEGER(0, "timeout", &stat_config.timeout,
762 "stop workload and print counts after a timeout period in ms (>= 10ms)"),
763 OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
764 "aggregate counts per processor socket", AGGR_SOCKET),
765 OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
766 "aggregate counts per physical processor core", AGGR_CORE),
767 OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
768 "aggregate counts per thread", AGGR_THREAD),
769 OPT_UINTEGER('D', "delay", &stat_config.initial_delay,
770 "ms to wait before starting measurement after program start"),
771 OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL,
772 "Only print computed metrics. No raw values", enable_metric_only),
773 OPT_BOOLEAN(0, "topdown", &topdown_run,
774 "measure topdown level 1 statistics"),
775 OPT_BOOLEAN(0, "smi-cost", &smi_cost,
776 "measure SMI cost"),
777 OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
778 "monitor specified metrics or metric groups (separated by ,)",
779 parse_metric_groups),
780 OPT_END()
781 };
782
783 static int perf_stat__get_socket(struct perf_stat_config *config __maybe_unused,
784 struct cpu_map *map, int cpu)
785 {
786 return cpu_map__get_socket(map, cpu, NULL);
787 }
788
789 static int perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
790 struct cpu_map *map, int cpu)
791 {
792 return cpu_map__get_core(map, cpu, NULL);
793 }
794
795 static int cpu_map__get_max(struct cpu_map *map)
796 {
797 int i, max = -1;
798
799 for (i = 0; i < map->nr; i++) {
800 if (map->map[i] > max)
801 max = map->map[i];
802 }
803
804 return max;
805 }
806
807 static int perf_stat__get_aggr(struct perf_stat_config *config,
808 aggr_get_id_t get_id, struct cpu_map *map, int idx)
809 {
810 int cpu;
811
812 if (idx >= map->nr)
813 return -1;
814
815 cpu = map->map[idx];
816
817 if (config->cpus_aggr_map->map[cpu] == -1)
818 config->cpus_aggr_map->map[cpu] = get_id(config, map, idx);
819
820 return config->cpus_aggr_map->map[cpu];
821 }
822
823 static int perf_stat__get_socket_cached(struct perf_stat_config *config,
824 struct cpu_map *map, int idx)
825 {
826 return perf_stat__get_aggr(config, perf_stat__get_socket, map, idx);
827 }
828
829 static int perf_stat__get_core_cached(struct perf_stat_config *config,
830 struct cpu_map *map, int idx)
831 {
832 return perf_stat__get_aggr(config, perf_stat__get_core, map, idx);
833 }
834
835 static int perf_stat_init_aggr_mode(void)
836 {
837 int nr;
838
839 switch (stat_config.aggr_mode) {
840 case AGGR_SOCKET:
841 if (cpu_map__build_socket_map(evsel_list->cpus, &stat_config.aggr_map)) {
842 perror("cannot build socket map");
843 return -1;
844 }
845 stat_config.aggr_get_id = perf_stat__get_socket_cached;
846 break;
847 case AGGR_CORE:
848 if (cpu_map__build_core_map(evsel_list->cpus, &stat_config.aggr_map)) {
849 perror("cannot build core map");
850 return -1;
851 }
852 stat_config.aggr_get_id = perf_stat__get_core_cached;
853 break;
854 case AGGR_NONE:
855 case AGGR_GLOBAL:
856 case AGGR_THREAD:
857 case AGGR_UNSET:
858 default:
859 break;
860 }
861
862 /*
863 * The evsel_list->cpus is the base we operate on,
864 * taking the highest cpu number to be the size of
865 * the aggregation translate cpumap.
866 */
867 nr = cpu_map__get_max(evsel_list->cpus);
868 stat_config.cpus_aggr_map = cpu_map__empty_new(nr + 1);
869 return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
870 }
871
872 static void perf_stat__exit_aggr_mode(void)
873 {
874 cpu_map__put(stat_config.aggr_map);
875 cpu_map__put(stat_config.cpus_aggr_map);
876 stat_config.aggr_map = NULL;
877 stat_config.cpus_aggr_map = NULL;
878 }
879
880 static inline int perf_env__get_cpu(struct perf_env *env, struct cpu_map *map, int idx)
881 {
882 int cpu;
883
884 if (idx > map->nr)
885 return -1;
886
887 cpu = map->map[idx];
888
889 if (cpu >= env->nr_cpus_avail)
890 return -1;
891
892 return cpu;
893 }
894
895 static int perf_env__get_socket(struct cpu_map *map, int idx, void *data)
896 {
897 struct perf_env *env = data;
898 int cpu = perf_env__get_cpu(env, map, idx);
899
900 return cpu == -1 ? -1 : env->cpu[cpu].socket_id;
901 }
902
903 static int perf_env__get_core(struct cpu_map *map, int idx, void *data)
904 {
905 struct perf_env *env = data;
906 int core = -1, cpu = perf_env__get_cpu(env, map, idx);
907
908 if (cpu != -1) {
909 int socket_id = env->cpu[cpu].socket_id;
910
911 /*
912 * Encode socket in upper 16 bits
913 * core_id is relative to socket, and
914 * we need a global id. So we combine
915 * socket + core id.
916 */
917 core = (socket_id << 16) | (env->cpu[cpu].core_id & 0xffff);
918 }
919
920 return core;
921 }
922
923 static int perf_env__build_socket_map(struct perf_env *env, struct cpu_map *cpus,
924 struct cpu_map **sockp)
925 {
926 return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
927 }
928
929 static int perf_env__build_core_map(struct perf_env *env, struct cpu_map *cpus,
930 struct cpu_map **corep)
931 {
932 return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
933 }
934
935 static int perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused,
936 struct cpu_map *map, int idx)
937 {
938 return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
939 }
940
941 static int perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused,
942 struct cpu_map *map, int idx)
943 {
944 return perf_env__get_core(map, idx, &perf_stat.session->header.env);
945 }
946
947 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
948 {
949 struct perf_env *env = &st->session->header.env;
950
951 switch (stat_config.aggr_mode) {
952 case AGGR_SOCKET:
953 if (perf_env__build_socket_map(env, evsel_list->cpus, &stat_config.aggr_map)) {
954 perror("cannot build socket map");
955 return -1;
956 }
957 stat_config.aggr_get_id = perf_stat__get_socket_file;
958 break;
959 case AGGR_CORE:
960 if (perf_env__build_core_map(env, evsel_list->cpus, &stat_config.aggr_map)) {
961 perror("cannot build core map");
962 return -1;
963 }
964 stat_config.aggr_get_id = perf_stat__get_core_file;
965 break;
966 case AGGR_NONE:
967 case AGGR_GLOBAL:
968 case AGGR_THREAD:
969 case AGGR_UNSET:
970 default:
971 break;
972 }
973
974 return 0;
975 }
976
977 static int topdown_filter_events(const char **attr, char **str, bool use_group)
978 {
979 int off = 0;
980 int i;
981 int len = 0;
982 char *s;
983
984 for (i = 0; attr[i]; i++) {
985 if (pmu_have_event("cpu", attr[i])) {
986 len += strlen(attr[i]) + 1;
987 attr[i - off] = attr[i];
988 } else
989 off++;
990 }
991 attr[i - off] = NULL;
992
993 *str = malloc(len + 1 + 2);
994 if (!*str)
995 return -1;
996 s = *str;
997 if (i - off == 0) {
998 *s = 0;
999 return 0;
1000 }
1001 if (use_group)
1002 *s++ = '{';
1003 for (i = 0; attr[i]; i++) {
1004 strcpy(s, attr[i]);
1005 s += strlen(s);
1006 *s++ = ',';
1007 }
1008 if (use_group) {
1009 s[-1] = '}';
1010 *s = 0;
1011 } else
1012 s[-1] = 0;
1013 return 0;
1014 }
1015
1016 __weak bool arch_topdown_check_group(bool *warn)
1017 {
1018 *warn = false;
1019 return false;
1020 }
1021
1022 __weak void arch_topdown_group_warn(void)
1023 {
1024 }
1025
1026 /*
1027 * Add default attributes, if there were no attributes specified or
1028 * if -d/--detailed, -d -d or -d -d -d is used:
1029 */
1030 static int add_default_attributes(void)
1031 {
1032 int err;
1033 struct perf_event_attr default_attrs0[] = {
1034
1035 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
1036 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
1037 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
1038 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
1039
1040 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
1041 };
1042 struct perf_event_attr frontend_attrs[] = {
1043 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1044 };
1045 struct perf_event_attr backend_attrs[] = {
1046 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
1047 };
1048 struct perf_event_attr default_attrs1[] = {
1049 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
1050 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
1051 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
1052
1053 };
1054
1055 /*
1056 * Detailed stats (-d), covering the L1 and last level data caches:
1057 */
1058 struct perf_event_attr detailed_attrs[] = {
1059
1060 { .type = PERF_TYPE_HW_CACHE,
1061 .config =
1062 PERF_COUNT_HW_CACHE_L1D << 0 |
1063 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1064 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1065
1066 { .type = PERF_TYPE_HW_CACHE,
1067 .config =
1068 PERF_COUNT_HW_CACHE_L1D << 0 |
1069 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1070 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1071
1072 { .type = PERF_TYPE_HW_CACHE,
1073 .config =
1074 PERF_COUNT_HW_CACHE_LL << 0 |
1075 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1076 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1077
1078 { .type = PERF_TYPE_HW_CACHE,
1079 .config =
1080 PERF_COUNT_HW_CACHE_LL << 0 |
1081 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1082 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1083 };
1084
1085 /*
1086 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1087 */
1088 struct perf_event_attr very_detailed_attrs[] = {
1089
1090 { .type = PERF_TYPE_HW_CACHE,
1091 .config =
1092 PERF_COUNT_HW_CACHE_L1I << 0 |
1093 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1094 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1095
1096 { .type = PERF_TYPE_HW_CACHE,
1097 .config =
1098 PERF_COUNT_HW_CACHE_L1I << 0 |
1099 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1100 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1101
1102 { .type = PERF_TYPE_HW_CACHE,
1103 .config =
1104 PERF_COUNT_HW_CACHE_DTLB << 0 |
1105 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1106 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1107
1108 { .type = PERF_TYPE_HW_CACHE,
1109 .config =
1110 PERF_COUNT_HW_CACHE_DTLB << 0 |
1111 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1112 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1113
1114 { .type = PERF_TYPE_HW_CACHE,
1115 .config =
1116 PERF_COUNT_HW_CACHE_ITLB << 0 |
1117 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1118 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1119
1120 { .type = PERF_TYPE_HW_CACHE,
1121 .config =
1122 PERF_COUNT_HW_CACHE_ITLB << 0 |
1123 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1124 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1125
1126 };
1127
1128 /*
1129 * Very, very detailed stats (-d -d -d), adding prefetch events:
1130 */
1131 struct perf_event_attr very_very_detailed_attrs[] = {
1132
1133 { .type = PERF_TYPE_HW_CACHE,
1134 .config =
1135 PERF_COUNT_HW_CACHE_L1D << 0 |
1136 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1137 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1138
1139 { .type = PERF_TYPE_HW_CACHE,
1140 .config =
1141 PERF_COUNT_HW_CACHE_L1D << 0 |
1142 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1143 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1144 };
1145 struct parse_events_error errinfo;
1146
1147 /* Set attrs if no event is selected and !null_run: */
1148 if (stat_config.null_run)
1149 return 0;
1150
1151 if (transaction_run) {
1152 /* Handle -T as -M transaction. Once platform specific metrics
1153 * support has been added to the json files, all archictures
1154 * will use this approach. To determine transaction support
1155 * on an architecture test for such a metric name.
1156 */
1157 if (metricgroup__has_metric("transaction")) {
1158 struct option opt = { .value = &evsel_list };
1159
1160 return metricgroup__parse_groups(&opt, "transaction",
1161 &stat_config.metric_events);
1162 }
1163
1164 if (pmu_have_event("cpu", "cycles-ct") &&
1165 pmu_have_event("cpu", "el-start"))
1166 err = parse_events(evsel_list, transaction_attrs,
1167 &errinfo);
1168 else
1169 err = parse_events(evsel_list,
1170 transaction_limited_attrs,
1171 &errinfo);
1172 if (err) {
1173 fprintf(stderr, "Cannot set up transaction events\n");
1174 parse_events_print_error(&errinfo, transaction_attrs);
1175 return -1;
1176 }
1177 return 0;
1178 }
1179
1180 if (smi_cost) {
1181 int smi;
1182
1183 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
1184 fprintf(stderr, "freeze_on_smi is not supported.\n");
1185 return -1;
1186 }
1187
1188 if (!smi) {
1189 if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) {
1190 fprintf(stderr, "Failed to set freeze_on_smi.\n");
1191 return -1;
1192 }
1193 smi_reset = true;
1194 }
1195
1196 if (pmu_have_event("msr", "aperf") &&
1197 pmu_have_event("msr", "smi")) {
1198 if (!force_metric_only)
1199 stat_config.metric_only = true;
1200 err = parse_events(evsel_list, smi_cost_attrs, &errinfo);
1201 } else {
1202 fprintf(stderr, "To measure SMI cost, it needs "
1203 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n");
1204 parse_events_print_error(&errinfo, smi_cost_attrs);
1205 return -1;
1206 }
1207 if (err) {
1208 fprintf(stderr, "Cannot set up SMI cost events\n");
1209 return -1;
1210 }
1211 return 0;
1212 }
1213
1214 if (topdown_run) {
1215 char *str = NULL;
1216 bool warn = false;
1217
1218 if (stat_config.aggr_mode != AGGR_GLOBAL &&
1219 stat_config.aggr_mode != AGGR_CORE) {
1220 pr_err("top down event configuration requires --per-core mode\n");
1221 return -1;
1222 }
1223 stat_config.aggr_mode = AGGR_CORE;
1224 if (nr_cgroups || !target__has_cpu(&target)) {
1225 pr_err("top down event configuration requires system-wide mode (-a)\n");
1226 return -1;
1227 }
1228
1229 if (!force_metric_only)
1230 stat_config.metric_only = true;
1231 if (topdown_filter_events(topdown_attrs, &str,
1232 arch_topdown_check_group(&warn)) < 0) {
1233 pr_err("Out of memory\n");
1234 return -1;
1235 }
1236 if (topdown_attrs[0] && str) {
1237 if (warn)
1238 arch_topdown_group_warn();
1239 err = parse_events(evsel_list, str, &errinfo);
1240 if (err) {
1241 fprintf(stderr,
1242 "Cannot set up top down events %s: %d\n",
1243 str, err);
1244 free(str);
1245 parse_events_print_error(&errinfo, str);
1246 return -1;
1247 }
1248 } else {
1249 fprintf(stderr, "System does not support topdown\n");
1250 return -1;
1251 }
1252 free(str);
1253 }
1254
1255 if (!evsel_list->nr_entries) {
1256 if (target__has_cpu(&target))
1257 default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
1258
1259 if (perf_evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
1260 return -1;
1261 if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
1262 if (perf_evlist__add_default_attrs(evsel_list,
1263 frontend_attrs) < 0)
1264 return -1;
1265 }
1266 if (pmu_have_event("cpu", "stalled-cycles-backend")) {
1267 if (perf_evlist__add_default_attrs(evsel_list,
1268 backend_attrs) < 0)
1269 return -1;
1270 }
1271 if (perf_evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
1272 return -1;
1273 }
1274
1275 /* Detailed events get appended to the event list: */
1276
1277 if (detailed_run < 1)
1278 return 0;
1279
1280 /* Append detailed run extra attributes: */
1281 if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1282 return -1;
1283
1284 if (detailed_run < 2)
1285 return 0;
1286
1287 /* Append very detailed run extra attributes: */
1288 if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1289 return -1;
1290
1291 if (detailed_run < 3)
1292 return 0;
1293
1294 /* Append very, very detailed run extra attributes: */
1295 return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1296 }
1297
1298 static const char * const stat_record_usage[] = {
1299 "perf stat record [<options>]",
1300 NULL,
1301 };
1302
1303 static void init_features(struct perf_session *session)
1304 {
1305 int feat;
1306
1307 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
1308 perf_header__set_feat(&session->header, feat);
1309
1310 perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
1311 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
1312 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
1313 perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
1314 }
1315
1316 static int __cmd_record(int argc, const char **argv)
1317 {
1318 struct perf_session *session;
1319 struct perf_data *data = &perf_stat.data;
1320
1321 argc = parse_options(argc, argv, stat_options, stat_record_usage,
1322 PARSE_OPT_STOP_AT_NON_OPTION);
1323
1324 if (output_name)
1325 data->path = output_name;
1326
1327 if (stat_config.run_count != 1 || forever) {
1328 pr_err("Cannot use -r option with perf stat record.\n");
1329 return -1;
1330 }
1331
1332 session = perf_session__new(data, false, NULL);
1333 if (session == NULL) {
1334 pr_err("Perf session creation failed.\n");
1335 return -1;
1336 }
1337
1338 init_features(session);
1339
1340 session->evlist = evsel_list;
1341 perf_stat.session = session;
1342 perf_stat.record = true;
1343 return argc;
1344 }
1345
1346 static int process_stat_round_event(struct perf_session *session,
1347 union perf_event *event)
1348 {
1349 struct stat_round_event *stat_round = &event->stat_round;
1350 struct perf_evsel *counter;
1351 struct timespec tsh, *ts = NULL;
1352 const char **argv = session->header.env.cmdline_argv;
1353 int argc = session->header.env.nr_cmdline;
1354
1355 evlist__for_each_entry(evsel_list, counter)
1356 perf_stat_process_counter(&stat_config, counter);
1357
1358 if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
1359 update_stats(&walltime_nsecs_stats, stat_round->time);
1360
1361 if (stat_config.interval && stat_round->time) {
1362 tsh.tv_sec = stat_round->time / NSEC_PER_SEC;
1363 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
1364 ts = &tsh;
1365 }
1366
1367 print_counters(ts, argc, argv);
1368 return 0;
1369 }
1370
1371 static
1372 int process_stat_config_event(struct perf_session *session,
1373 union perf_event *event)
1374 {
1375 struct perf_tool *tool = session->tool;
1376 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1377
1378 perf_event__read_stat_config(&stat_config, &event->stat_config);
1379
1380 if (cpu_map__empty(st->cpus)) {
1381 if (st->aggr_mode != AGGR_UNSET)
1382 pr_warning("warning: processing task data, aggregation mode not set\n");
1383 return 0;
1384 }
1385
1386 if (st->aggr_mode != AGGR_UNSET)
1387 stat_config.aggr_mode = st->aggr_mode;
1388
1389 if (perf_stat.data.is_pipe)
1390 perf_stat_init_aggr_mode();
1391 else
1392 perf_stat_init_aggr_mode_file(st);
1393
1394 return 0;
1395 }
1396
1397 static int set_maps(struct perf_stat *st)
1398 {
1399 if (!st->cpus || !st->threads)
1400 return 0;
1401
1402 if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
1403 return -EINVAL;
1404
1405 perf_evlist__set_maps(evsel_list, st->cpus, st->threads);
1406
1407 if (perf_evlist__alloc_stats(evsel_list, true))
1408 return -ENOMEM;
1409
1410 st->maps_allocated = true;
1411 return 0;
1412 }
1413
1414 static
1415 int process_thread_map_event(struct perf_session *session,
1416 union perf_event *event)
1417 {
1418 struct perf_tool *tool = session->tool;
1419 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1420
1421 if (st->threads) {
1422 pr_warning("Extra thread map event, ignoring.\n");
1423 return 0;
1424 }
1425
1426 st->threads = thread_map__new_event(&event->thread_map);
1427 if (!st->threads)
1428 return -ENOMEM;
1429
1430 return set_maps(st);
1431 }
1432
1433 static
1434 int process_cpu_map_event(struct perf_session *session,
1435 union perf_event *event)
1436 {
1437 struct perf_tool *tool = session->tool;
1438 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1439 struct cpu_map *cpus;
1440
1441 if (st->cpus) {
1442 pr_warning("Extra cpu map event, ignoring.\n");
1443 return 0;
1444 }
1445
1446 cpus = cpu_map__new_data(&event->cpu_map.data);
1447 if (!cpus)
1448 return -ENOMEM;
1449
1450 st->cpus = cpus;
1451 return set_maps(st);
1452 }
1453
1454 static int runtime_stat_new(struct perf_stat_config *config, int nthreads)
1455 {
1456 int i;
1457
1458 config->stats = calloc(nthreads, sizeof(struct runtime_stat));
1459 if (!config->stats)
1460 return -1;
1461
1462 config->stats_num = nthreads;
1463
1464 for (i = 0; i < nthreads; i++)
1465 runtime_stat__init(&config->stats[i]);
1466
1467 return 0;
1468 }
1469
1470 static void runtime_stat_delete(struct perf_stat_config *config)
1471 {
1472 int i;
1473
1474 if (!config->stats)
1475 return;
1476
1477 for (i = 0; i < config->stats_num; i++)
1478 runtime_stat__exit(&config->stats[i]);
1479
1480 free(config->stats);
1481 }
1482
1483 static const char * const stat_report_usage[] = {
1484 "perf stat report [<options>]",
1485 NULL,
1486 };
1487
1488 static struct perf_stat perf_stat = {
1489 .tool = {
1490 .attr = perf_event__process_attr,
1491 .event_update = perf_event__process_event_update,
1492 .thread_map = process_thread_map_event,
1493 .cpu_map = process_cpu_map_event,
1494 .stat_config = process_stat_config_event,
1495 .stat = perf_event__process_stat_event,
1496 .stat_round = process_stat_round_event,
1497 },
1498 .aggr_mode = AGGR_UNSET,
1499 };
1500
1501 static int __cmd_report(int argc, const char **argv)
1502 {
1503 struct perf_session *session;
1504 const struct option options[] = {
1505 OPT_STRING('i', "input", &input_name, "file", "input file name"),
1506 OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
1507 "aggregate counts per processor socket", AGGR_SOCKET),
1508 OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
1509 "aggregate counts per physical processor core", AGGR_CORE),
1510 OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
1511 "disable CPU count aggregation", AGGR_NONE),
1512 OPT_END()
1513 };
1514 struct stat st;
1515 int ret;
1516
1517 argc = parse_options(argc, argv, options, stat_report_usage, 0);
1518
1519 if (!input_name || !strlen(input_name)) {
1520 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
1521 input_name = "-";
1522 else
1523 input_name = "perf.data";
1524 }
1525
1526 perf_stat.data.path = input_name;
1527 perf_stat.data.mode = PERF_DATA_MODE_READ;
1528
1529 session = perf_session__new(&perf_stat.data, false, &perf_stat.tool);
1530 if (session == NULL)
1531 return -1;
1532
1533 perf_stat.session = session;
1534 stat_config.output = stderr;
1535 evsel_list = session->evlist;
1536
1537 ret = perf_session__process_events(session);
1538 if (ret)
1539 return ret;
1540
1541 perf_session__delete(session);
1542 return 0;
1543 }
1544
1545 static void setup_system_wide(int forks)
1546 {
1547 /*
1548 * Make system wide (-a) the default target if
1549 * no target was specified and one of following
1550 * conditions is met:
1551 *
1552 * - there's no workload specified
1553 * - there is workload specified but all requested
1554 * events are system wide events
1555 */
1556 if (!target__none(&target))
1557 return;
1558
1559 if (!forks)
1560 target.system_wide = true;
1561 else {
1562 struct perf_evsel *counter;
1563
1564 evlist__for_each_entry(evsel_list, counter) {
1565 if (!counter->system_wide)
1566 return;
1567 }
1568
1569 if (evsel_list->nr_entries)
1570 target.system_wide = true;
1571 }
1572 }
1573
1574 int cmd_stat(int argc, const char **argv)
1575 {
1576 const char * const stat_usage[] = {
1577 "perf stat [<options>] [<command>]",
1578 NULL
1579 };
1580 int status = -EINVAL, run_idx;
1581 const char *mode;
1582 FILE *output = stderr;
1583 unsigned int interval, timeout;
1584 const char * const stat_subcommands[] = { "record", "report" };
1585
1586 setlocale(LC_ALL, "");
1587
1588 evsel_list = perf_evlist__new();
1589 if (evsel_list == NULL)
1590 return -ENOMEM;
1591
1592 parse_events__shrink_config_terms();
1593
1594 /* String-parsing callback-based options would segfault when negated */
1595 set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG);
1596 set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG);
1597 set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG);
1598
1599 argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
1600 (const char **) stat_usage,
1601 PARSE_OPT_STOP_AT_NON_OPTION);
1602 perf_stat__collect_metric_expr(evsel_list);
1603 perf_stat__init_shadow_stats();
1604
1605 if (stat_config.csv_sep) {
1606 stat_config.csv_output = true;
1607 if (!strcmp(stat_config.csv_sep, "\\t"))
1608 stat_config.csv_sep = "\t";
1609 } else
1610 stat_config.csv_sep = DEFAULT_SEPARATOR;
1611
1612 if (argc && !strncmp(argv[0], "rec", 3)) {
1613 argc = __cmd_record(argc, argv);
1614 if (argc < 0)
1615 return -1;
1616 } else if (argc && !strncmp(argv[0], "rep", 3))
1617 return __cmd_report(argc, argv);
1618
1619 interval = stat_config.interval;
1620 timeout = stat_config.timeout;
1621
1622 /*
1623 * For record command the -o is already taken care of.
1624 */
1625 if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
1626 output = NULL;
1627
1628 if (output_name && output_fd) {
1629 fprintf(stderr, "cannot use both --output and --log-fd\n");
1630 parse_options_usage(stat_usage, stat_options, "o", 1);
1631 parse_options_usage(NULL, stat_options, "log-fd", 0);
1632 goto out;
1633 }
1634
1635 if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) {
1636 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
1637 goto out;
1638 }
1639
1640 if (stat_config.metric_only && stat_config.run_count > 1) {
1641 fprintf(stderr, "--metric-only is not supported with -r\n");
1642 goto out;
1643 }
1644
1645 if (stat_config.walltime_run_table && stat_config.run_count <= 1) {
1646 fprintf(stderr, "--table is only supported with -r\n");
1647 parse_options_usage(stat_usage, stat_options, "r", 1);
1648 parse_options_usage(NULL, stat_options, "table", 0);
1649 goto out;
1650 }
1651
1652 if (output_fd < 0) {
1653 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1654 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
1655 goto out;
1656 }
1657
1658 if (!output) {
1659 struct timespec tm;
1660 mode = append_file ? "a" : "w";
1661
1662 output = fopen(output_name, mode);
1663 if (!output) {
1664 perror("failed to create output file");
1665 return -1;
1666 }
1667 clock_gettime(CLOCK_REALTIME, &tm);
1668 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1669 } else if (output_fd > 0) {
1670 mode = append_file ? "a" : "w";
1671 output = fdopen(output_fd, mode);
1672 if (!output) {
1673 perror("Failed opening logfd");
1674 return -errno;
1675 }
1676 }
1677
1678 stat_config.output = output;
1679
1680 /*
1681 * let the spreadsheet do the pretty-printing
1682 */
1683 if (stat_config.csv_output) {
1684 /* User explicitly passed -B? */
1685 if (big_num_opt == 1) {
1686 fprintf(stderr, "-B option not supported with -x\n");
1687 parse_options_usage(stat_usage, stat_options, "B", 1);
1688 parse_options_usage(NULL, stat_options, "x", 1);
1689 goto out;
1690 } else /* Nope, so disable big number formatting */
1691 stat_config.big_num = false;
1692 } else if (big_num_opt == 0) /* User passed --no-big-num */
1693 stat_config.big_num = false;
1694
1695 setup_system_wide(argc);
1696
1697 /*
1698 * Display user/system times only for single
1699 * run and when there's specified tracee.
1700 */
1701 if ((stat_config.run_count == 1) && target__none(&target))
1702 stat_config.ru_display = true;
1703
1704 if (stat_config.run_count < 0) {
1705 pr_err("Run count must be a positive number\n");
1706 parse_options_usage(stat_usage, stat_options, "r", 1);
1707 goto out;
1708 } else if (stat_config.run_count == 0) {
1709 forever = true;
1710 stat_config.run_count = 1;
1711 }
1712
1713 if (stat_config.walltime_run_table) {
1714 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0]));
1715 if (!stat_config.walltime_run) {
1716 pr_err("failed to setup -r option");
1717 goto out;
1718 }
1719 }
1720
1721 if ((stat_config.aggr_mode == AGGR_THREAD) &&
1722 !target__has_task(&target)) {
1723 if (!target.system_wide || target.cpu_list) {
1724 fprintf(stderr, "The --per-thread option is only "
1725 "available when monitoring via -p -t -a "
1726 "options or only --per-thread.\n");
1727 parse_options_usage(NULL, stat_options, "p", 1);
1728 parse_options_usage(NULL, stat_options, "t", 1);
1729 goto out;
1730 }
1731 }
1732
1733 /*
1734 * no_aggr, cgroup are for system-wide only
1735 * --per-thread is aggregated per thread, we dont mix it with cpu mode
1736 */
1737 if (((stat_config.aggr_mode != AGGR_GLOBAL &&
1738 stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
1739 !target__has_cpu(&target)) {
1740 fprintf(stderr, "both cgroup and no-aggregation "
1741 "modes only available in system-wide mode\n");
1742
1743 parse_options_usage(stat_usage, stat_options, "G", 1);
1744 parse_options_usage(NULL, stat_options, "A", 1);
1745 parse_options_usage(NULL, stat_options, "a", 1);
1746 goto out;
1747 }
1748
1749 if (add_default_attributes())
1750 goto out;
1751
1752 target__validate(&target);
1753
1754 if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
1755 target.per_thread = true;
1756
1757 if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1758 if (target__has_task(&target)) {
1759 pr_err("Problems finding threads of monitor\n");
1760 parse_options_usage(stat_usage, stat_options, "p", 1);
1761 parse_options_usage(NULL, stat_options, "t", 1);
1762 } else if (target__has_cpu(&target)) {
1763 perror("failed to parse CPUs map");
1764 parse_options_usage(stat_usage, stat_options, "C", 1);
1765 parse_options_usage(NULL, stat_options, "a", 1);
1766 }
1767 goto out;
1768 }
1769
1770 /*
1771 * Initialize thread_map with comm names,
1772 * so we could print it out on output.
1773 */
1774 if (stat_config.aggr_mode == AGGR_THREAD) {
1775 thread_map__read_comms(evsel_list->threads);
1776 if (target.system_wide) {
1777 if (runtime_stat_new(&stat_config,
1778 thread_map__nr(evsel_list->threads))) {
1779 goto out;
1780 }
1781 }
1782 }
1783
1784 if (stat_config.times && interval)
1785 interval_count = true;
1786 else if (stat_config.times && !interval) {
1787 pr_err("interval-count option should be used together with "
1788 "interval-print.\n");
1789 parse_options_usage(stat_usage, stat_options, "interval-count", 0);
1790 parse_options_usage(stat_usage, stat_options, "I", 1);
1791 goto out;
1792 }
1793
1794 if (timeout && timeout < 100) {
1795 if (timeout < 10) {
1796 pr_err("timeout must be >= 10ms.\n");
1797 parse_options_usage(stat_usage, stat_options, "timeout", 0);
1798 goto out;
1799 } else
1800 pr_warning("timeout < 100ms. "
1801 "The overhead percentage could be high in some cases. "
1802 "Please proceed with caution.\n");
1803 }
1804 if (timeout && interval) {
1805 pr_err("timeout option is not supported with interval-print.\n");
1806 parse_options_usage(stat_usage, stat_options, "timeout", 0);
1807 parse_options_usage(stat_usage, stat_options, "I", 1);
1808 goto out;
1809 }
1810
1811 if (perf_evlist__alloc_stats(evsel_list, interval))
1812 goto out;
1813
1814 if (perf_stat_init_aggr_mode())
1815 goto out;
1816
1817 /*
1818 * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
1819 * while avoiding that older tools show confusing messages.
1820 *
1821 * However for pipe sessions we need to keep it zero,
1822 * because script's perf_evsel__check_attr is triggered
1823 * by attr->sample_type != 0, and we can't run it on
1824 * stat sessions.
1825 */
1826 stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe);
1827
1828 /*
1829 * We dont want to block the signals - that would cause
1830 * child tasks to inherit that and Ctrl-C would not work.
1831 * What we want is for Ctrl-C to work in the exec()-ed
1832 * task, but being ignored by perf stat itself:
1833 */
1834 atexit(sig_atexit);
1835 if (!forever)
1836 signal(SIGINT, skip_signal);
1837 signal(SIGCHLD, skip_signal);
1838 signal(SIGALRM, skip_signal);
1839 signal(SIGABRT, skip_signal);
1840
1841 status = 0;
1842 for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) {
1843 if (stat_config.run_count != 1 && verbose > 0)
1844 fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1845 run_idx + 1);
1846
1847 status = run_perf_stat(argc, argv, run_idx);
1848 if (forever && status != -1) {
1849 print_counters(NULL, argc, argv);
1850 perf_stat__reset_stats();
1851 }
1852 }
1853
1854 if (!forever && status != -1 && !interval)
1855 print_counters(NULL, argc, argv);
1856
1857 if (STAT_RECORD) {
1858 /*
1859 * We synthesize the kernel mmap record just so that older tools
1860 * don't emit warnings about not being able to resolve symbols
1861 * due to /proc/sys/kernel/kptr_restrict settings and instear provide
1862 * a saner message about no samples being in the perf.data file.
1863 *
1864 * This also serves to suppress a warning about f_header.data.size == 0
1865 * in header.c at the moment 'perf stat record' gets introduced, which
1866 * is not really needed once we start adding the stat specific PERF_RECORD_
1867 * records, but the need to suppress the kptr_restrict messages in older
1868 * tools remain -acme
1869 */
1870 int fd = perf_data__fd(&perf_stat.data);
1871 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
1872 process_synthesized_event,
1873 &perf_stat.session->machines.host);
1874 if (err) {
1875 pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
1876 "older tools may produce warnings about this file\n.");
1877 }
1878
1879 if (!interval) {
1880 if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
1881 pr_err("failed to write stat round event\n");
1882 }
1883
1884 if (!perf_stat.data.is_pipe) {
1885 perf_stat.session->header.data_size += perf_stat.bytes_written;
1886 perf_session__write_header(perf_stat.session, evsel_list, fd, true);
1887 }
1888
1889 perf_session__delete(perf_stat.session);
1890 }
1891
1892 perf_stat__exit_aggr_mode();
1893 perf_evlist__free_stats(evsel_list);
1894 out:
1895 free(stat_config.walltime_run);
1896
1897 if (smi_cost && smi_reset)
1898 sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
1899
1900 perf_evlist__delete(evsel_list);
1901
1902 runtime_stat_delete(&stat_config);
1903
1904 return status;
1905 }
Linux with added FPC-III support