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Merge tag 'block-5.11-2021-01-10' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / tools / perf / builtin-stat.c
blob8cc24967bc2733010350827ce6cdfbdbff87cccc
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3 * builtin-stat.c
4 *
5 * Builtin stat command: Give a precise performance counters summary
6 * overview about any workload, CPU or specific PID.
7 *
8 * Sample output:
9
10 $ perf stat ./hackbench 10
11
12 Time: 0.118
13
14 Performance counter stats for './hackbench 10':
15
16 1708.761321 task-clock # 11.037 CPUs utilized
17 41,190 context-switches # 0.024 M/sec
18 6,735 CPU-migrations # 0.004 M/sec
19 17,318 page-faults # 0.010 M/sec
20 5,205,202,243 cycles # 3.046 GHz
21 3,856,436,920 stalled-cycles-frontend # 74.09% frontend cycles idle
22 1,600,790,871 stalled-cycles-backend # 30.75% backend cycles idle
23 2,603,501,247 instructions # 0.50 insns per cycle
24 # 1.48 stalled cycles per insn
25 484,357,498 branches # 283.455 M/sec
26 6,388,934 branch-misses # 1.32% of all branches
27
28 0.154822978 seconds time elapsed
29
30 *
31 * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
32 *
33 * Improvements and fixes by:
34 *
35 * Arjan van de Ven <arjan@linux.intel.com>
36 * Yanmin Zhang <yanmin.zhang@intel.com>
37 * Wu Fengguang <fengguang.wu@intel.com>
38 * Mike Galbraith <efault@gmx.de>
39 * Paul Mackerras <paulus@samba.org>
40 * Jaswinder Singh Rajput <jaswinder@kernel.org>
41 */
42
43 #include "builtin.h"
44 #include "perf.h"
45 #include "util/cgroup.h"
46 #include <subcmd/parse-options.h>
47 #include "util/parse-events.h"
48 #include "util/pmu.h"
49 #include "util/event.h"
50 #include "util/evlist.h"
51 #include "util/evsel.h"
52 #include "util/debug.h"
53 #include "util/color.h"
54 #include "util/stat.h"
55 #include "util/header.h"
56 #include "util/cpumap.h"
57 #include "util/thread_map.h"
58 #include "util/counts.h"
59 #include "util/topdown.h"
60 #include "util/session.h"
61 #include "util/tool.h"
62 #include "util/string2.h"
63 #include "util/metricgroup.h"
64 #include "util/synthetic-events.h"
65 #include "util/target.h"
66 #include "util/time-utils.h"
67 #include "util/top.h"
68 #include "util/affinity.h"
69 #include "util/pfm.h"
70 #include "asm/bug.h"
71
72 #include <linux/time64.h>
73 #include <linux/zalloc.h>
74 #include <api/fs/fs.h>
75 #include <errno.h>
76 #include <signal.h>
77 #include <stdlib.h>
78 #include <sys/prctl.h>
79 #include <inttypes.h>
80 #include <locale.h>
81 #include <math.h>
82 #include <sys/types.h>
83 #include <sys/stat.h>
84 #include <sys/wait.h>
85 #include <unistd.h>
86 #include <sys/time.h>
87 #include <sys/resource.h>
88 #include <linux/err.h>
89
90 #include <linux/ctype.h>
91 #include <perf/evlist.h>
92
93 #define DEFAULT_SEPARATOR " "
94 #define FREEZE_ON_SMI_PATH "devices/cpu/freeze_on_smi"
95
96 static void print_counters(struct timespec *ts, int argc, const char **argv);
97
98 /* Default events used for perf stat -T */
99 static const char *transaction_attrs = {
100 "task-clock,"
101 "{"
102 "instructions,"
103 "cycles,"
104 "cpu/cycles-t/,"
105 "cpu/tx-start/,"
106 "cpu/el-start/,"
107 "cpu/cycles-ct/"
108 "}"
109 };
110
111 /* More limited version when the CPU does not have all events. */
112 static const char * transaction_limited_attrs = {
113 "task-clock,"
114 "{"
115 "instructions,"
116 "cycles,"
117 "cpu/cycles-t/,"
118 "cpu/tx-start/"
119 "}"
120 };
121
122 static const char * topdown_attrs[] = {
123 "topdown-total-slots",
124 "topdown-slots-retired",
125 "topdown-recovery-bubbles",
126 "topdown-fetch-bubbles",
127 "topdown-slots-issued",
128 NULL,
129 };
130
131 static const char *topdown_metric_attrs[] = {
132 "slots",
133 "topdown-retiring",
134 "topdown-bad-spec",
135 "topdown-fe-bound",
136 "topdown-be-bound",
137 NULL,
138 };
139
140 static const char *smi_cost_attrs = {
141 "{"
142 "msr/aperf/,"
143 "msr/smi/,"
144 "cycles"
145 "}"
146 };
147
148 static struct evlist *evsel_list;
149
150 static struct target target = {
151 .uid = UINT_MAX,
152 };
153
154 #define METRIC_ONLY_LEN 20
155
156 static volatile pid_t child_pid = -1;
157 static int detailed_run = 0;
158 static bool transaction_run;
159 static bool topdown_run = false;
160 static bool smi_cost = false;
161 static bool smi_reset = false;
162 static int big_num_opt = -1;
163 static bool group = false;
164 static const char *pre_cmd = NULL;
165 static const char *post_cmd = NULL;
166 static bool sync_run = false;
167 static bool forever = false;
168 static bool force_metric_only = false;
169 static struct timespec ref_time;
170 static bool append_file;
171 static bool interval_count;
172 static const char *output_name;
173 static int output_fd;
174
175 struct perf_stat {
176 bool record;
177 struct perf_data data;
178 struct perf_session *session;
179 u64 bytes_written;
180 struct perf_tool tool;
181 bool maps_allocated;
182 struct perf_cpu_map *cpus;
183 struct perf_thread_map *threads;
184 enum aggr_mode aggr_mode;
185 };
186
187 static struct perf_stat perf_stat;
188 #define STAT_RECORD perf_stat.record
189
190 static volatile int done = 0;
191
192 static struct perf_stat_config stat_config = {
193 .aggr_mode = AGGR_GLOBAL,
194 .scale = true,
195 .unit_width = 4, /* strlen("unit") */
196 .run_count = 1,
197 .metric_only_len = METRIC_ONLY_LEN,
198 .walltime_nsecs_stats = &walltime_nsecs_stats,
199 .big_num = true,
200 .ctl_fd = -1,
201 .ctl_fd_ack = -1
202 };
203
204 static bool cpus_map_matched(struct evsel *a, struct evsel *b)
205 {
206 if (!a->core.cpus && !b->core.cpus)
207 return true;
208
209 if (!a->core.cpus || !b->core.cpus)
210 return false;
211
212 if (a->core.cpus->nr != b->core.cpus->nr)
213 return false;
214
215 for (int i = 0; i < a->core.cpus->nr; i++) {
216 if (a->core.cpus->map[i] != b->core.cpus->map[i])
217 return false;
218 }
219
220 return true;
221 }
222
223 static void evlist__check_cpu_maps(struct evlist *evlist)
224 {
225 struct evsel *evsel, *pos, *leader;
226 char buf[1024];
227
228 evlist__for_each_entry(evlist, evsel) {
229 leader = evsel->leader;
230
231 /* Check that leader matches cpus with each member. */
232 if (leader == evsel)
233 continue;
234 if (cpus_map_matched(leader, evsel))
235 continue;
236
237 /* If there's mismatch disable the group and warn user. */
238 WARN_ONCE(1, "WARNING: grouped events cpus do not match, disabling group:\n");
239 evsel__group_desc(leader, buf, sizeof(buf));
240 pr_warning(" %s\n", buf);
241
242 if (verbose) {
243 cpu_map__snprint(leader->core.cpus, buf, sizeof(buf));
244 pr_warning(" %s: %s\n", leader->name, buf);
245 cpu_map__snprint(evsel->core.cpus, buf, sizeof(buf));
246 pr_warning(" %s: %s\n", evsel->name, buf);
247 }
248
249 for_each_group_evsel(pos, leader) {
250 pos->leader = pos;
251 pos->core.nr_members = 0;
252 }
253 evsel->leader->core.nr_members = 0;
254 }
255 }
256
257 static inline void diff_timespec(struct timespec *r, struct timespec *a,
258 struct timespec *b)
259 {
260 r->tv_sec = a->tv_sec - b->tv_sec;
261 if (a->tv_nsec < b->tv_nsec) {
262 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
263 r->tv_sec--;
264 } else {
265 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
266 }
267 }
268
269 static void perf_stat__reset_stats(void)
270 {
271 int i;
272
273 evlist__reset_stats(evsel_list);
274 perf_stat__reset_shadow_stats();
275
276 for (i = 0; i < stat_config.stats_num; i++)
277 perf_stat__reset_shadow_per_stat(&stat_config.stats[i]);
278 }
279
280 static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
281 union perf_event *event,
282 struct perf_sample *sample __maybe_unused,
283 struct machine *machine __maybe_unused)
284 {
285 if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) {
286 pr_err("failed to write perf data, error: %m\n");
287 return -1;
288 }
289
290 perf_stat.bytes_written += event->header.size;
291 return 0;
292 }
293
294 static int write_stat_round_event(u64 tm, u64 type)
295 {
296 return perf_event__synthesize_stat_round(NULL, tm, type,
297 process_synthesized_event,
298 NULL);
299 }
300
301 #define WRITE_STAT_ROUND_EVENT(time, interval) \
302 write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
303
304 #define SID(e, x, y) xyarray__entry(e->core.sample_id, x, y)
305
306 static int evsel__write_stat_event(struct evsel *counter, u32 cpu, u32 thread,
307 struct perf_counts_values *count)
308 {
309 struct perf_sample_id *sid = SID(counter, cpu, thread);
310
311 return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
312 process_synthesized_event, NULL);
313 }
314
315 static int read_single_counter(struct evsel *counter, int cpu,
316 int thread, struct timespec *rs)
317 {
318 if (counter->tool_event == PERF_TOOL_DURATION_TIME) {
319 u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL;
320 struct perf_counts_values *count =
321 perf_counts(counter->counts, cpu, thread);
322 count->ena = count->run = val;
323 count->val = val;
324 return 0;
325 }
326 return evsel__read_counter(counter, cpu, thread);
327 }
328
329 /*
330 * Read out the results of a single counter:
331 * do not aggregate counts across CPUs in system-wide mode
332 */
333 static int read_counter_cpu(struct evsel *counter, struct timespec *rs, int cpu)
334 {
335 int nthreads = perf_thread_map__nr(evsel_list->core.threads);
336 int thread;
337
338 if (!counter->supported)
339 return -ENOENT;
340
341 if (counter->core.system_wide)
342 nthreads = 1;
343
344 for (thread = 0; thread < nthreads; thread++) {
345 struct perf_counts_values *count;
346
347 count = perf_counts(counter->counts, cpu, thread);
348
349 /*
350 * The leader's group read loads data into its group members
351 * (via evsel__read_counter()) and sets their count->loaded.
352 */
353 if (!perf_counts__is_loaded(counter->counts, cpu, thread) &&
354 read_single_counter(counter, cpu, thread, rs)) {
355 counter->counts->scaled = -1;
356 perf_counts(counter->counts, cpu, thread)->ena = 0;
357 perf_counts(counter->counts, cpu, thread)->run = 0;
358 return -1;
359 }
360
361 perf_counts__set_loaded(counter->counts, cpu, thread, false);
362
363 if (STAT_RECORD) {
364 if (evsel__write_stat_event(counter, cpu, thread, count)) {
365 pr_err("failed to write stat event\n");
366 return -1;
367 }
368 }
369
370 if (verbose > 1) {
371 fprintf(stat_config.output,
372 "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
373 evsel__name(counter),
374 cpu,
375 count->val, count->ena, count->run);
376 }
377 }
378
379 return 0;
380 }
381
382 static int read_affinity_counters(struct timespec *rs)
383 {
384 struct evsel *counter;
385 struct affinity affinity;
386 int i, ncpus, cpu;
387
388 if (affinity__setup(&affinity) < 0)
389 return -1;
390
391 ncpus = perf_cpu_map__nr(evsel_list->core.all_cpus);
392 if (!target__has_cpu(&target) || target__has_per_thread(&target))
393 ncpus = 1;
394 evlist__for_each_cpu(evsel_list, i, cpu) {
395 if (i >= ncpus)
396 break;
397 affinity__set(&affinity, cpu);
398
399 evlist__for_each_entry(evsel_list, counter) {
400 if (evsel__cpu_iter_skip(counter, cpu))
401 continue;
402 if (!counter->err) {
403 counter->err = read_counter_cpu(counter, rs,
404 counter->cpu_iter - 1);
405 }
406 }
407 }
408 affinity__cleanup(&affinity);
409 return 0;
410 }
411
412 static void read_counters(struct timespec *rs)
413 {
414 struct evsel *counter;
415
416 if (!stat_config.stop_read_counter && (read_affinity_counters(rs) < 0))
417 return;
418
419 evlist__for_each_entry(evsel_list, counter) {
420 if (counter->err)
421 pr_debug("failed to read counter %s\n", counter->name);
422 if (counter->err == 0 && perf_stat_process_counter(&stat_config, counter))
423 pr_warning("failed to process counter %s\n", counter->name);
424 counter->err = 0;
425 }
426 }
427
428 static int runtime_stat_new(struct perf_stat_config *config, int nthreads)
429 {
430 int i;
431
432 config->stats = calloc(nthreads, sizeof(struct runtime_stat));
433 if (!config->stats)
434 return -1;
435
436 config->stats_num = nthreads;
437
438 for (i = 0; i < nthreads; i++)
439 runtime_stat__init(&config->stats[i]);
440
441 return 0;
442 }
443
444 static void runtime_stat_delete(struct perf_stat_config *config)
445 {
446 int i;
447
448 if (!config->stats)
449 return;
450
451 for (i = 0; i < config->stats_num; i++)
452 runtime_stat__exit(&config->stats[i]);
453
454 zfree(&config->stats);
455 }
456
457 static void runtime_stat_reset(struct perf_stat_config *config)
458 {
459 int i;
460
461 if (!config->stats)
462 return;
463
464 for (i = 0; i < config->stats_num; i++)
465 perf_stat__reset_shadow_per_stat(&config->stats[i]);
466 }
467
468 static void process_interval(void)
469 {
470 struct timespec ts, rs;
471
472 clock_gettime(CLOCK_MONOTONIC, &ts);
473 diff_timespec(&rs, &ts, &ref_time);
474
475 perf_stat__reset_shadow_per_stat(&rt_stat);
476 runtime_stat_reset(&stat_config);
477 read_counters(&rs);
478
479 if (STAT_RECORD) {
480 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
481 pr_err("failed to write stat round event\n");
482 }
483
484 init_stats(&walltime_nsecs_stats);
485 update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000ULL);
486 print_counters(&rs, 0, NULL);
487 }
488
489 static bool handle_interval(unsigned int interval, int *times)
490 {
491 if (interval) {
492 process_interval();
493 if (interval_count && !(--(*times)))
494 return true;
495 }
496 return false;
497 }
498
499 static void enable_counters(void)
500 {
501 if (stat_config.initial_delay < 0) {
502 pr_info(EVLIST_DISABLED_MSG);
503 return;
504 }
505
506 if (stat_config.initial_delay > 0) {
507 pr_info(EVLIST_DISABLED_MSG);
508 usleep(stat_config.initial_delay * USEC_PER_MSEC);
509 }
510
511 /*
512 * We need to enable counters only if:
513 * - we don't have tracee (attaching to task or cpu)
514 * - we have initial delay configured
515 */
516 if (!target__none(&target) || stat_config.initial_delay) {
517 evlist__enable(evsel_list);
518 if (stat_config.initial_delay > 0)
519 pr_info(EVLIST_ENABLED_MSG);
520 }
521 }
522
523 static void disable_counters(void)
524 {
525 /*
526 * If we don't have tracee (attaching to task or cpu), counters may
527 * still be running. To get accurate group ratios, we must stop groups
528 * from counting before reading their constituent counters.
529 */
530 if (!target__none(&target))
531 evlist__disable(evsel_list);
532 }
533
534 static volatile int workload_exec_errno;
535
536 /*
537 * evlist__prepare_workload will send a SIGUSR1
538 * if the fork fails, since we asked by setting its
539 * want_signal to true.
540 */
541 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
542 void *ucontext __maybe_unused)
543 {
544 workload_exec_errno = info->si_value.sival_int;
545 }
546
547 static bool evsel__should_store_id(struct evsel *counter)
548 {
549 return STAT_RECORD || counter->core.attr.read_format & PERF_FORMAT_ID;
550 }
551
552 static bool is_target_alive(struct target *_target,
553 struct perf_thread_map *threads)
554 {
555 struct stat st;
556 int i;
557
558 if (!target__has_task(_target))
559 return true;
560
561 for (i = 0; i < threads->nr; i++) {
562 char path[PATH_MAX];
563
564 scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(),
565 threads->map[i].pid);
566
567 if (!stat(path, &st))
568 return true;
569 }
570
571 return false;
572 }
573
574 static void process_evlist(struct evlist *evlist, unsigned int interval)
575 {
576 enum evlist_ctl_cmd cmd = EVLIST_CTL_CMD_UNSUPPORTED;
577
578 if (evlist__ctlfd_process(evlist, &cmd) > 0) {
579 switch (cmd) {
580 case EVLIST_CTL_CMD_ENABLE:
581 pr_info(EVLIST_ENABLED_MSG);
582 if (interval)
583 process_interval();
584 break;
585 case EVLIST_CTL_CMD_DISABLE:
586 if (interval)
587 process_interval();
588 pr_info(EVLIST_DISABLED_MSG);
589 break;
590 case EVLIST_CTL_CMD_SNAPSHOT:
591 case EVLIST_CTL_CMD_ACK:
592 case EVLIST_CTL_CMD_UNSUPPORTED:
593 default:
594 break;
595 }
596 }
597 }
598
599 static void compute_tts(struct timespec *time_start, struct timespec *time_stop,
600 int *time_to_sleep)
601 {
602 int tts = *time_to_sleep;
603 struct timespec time_diff;
604
605 diff_timespec(&time_diff, time_stop, time_start);
606
607 tts -= time_diff.tv_sec * MSEC_PER_SEC +
608 time_diff.tv_nsec / NSEC_PER_MSEC;
609
610 if (tts < 0)
611 tts = 0;
612
613 *time_to_sleep = tts;
614 }
615
616 static int dispatch_events(bool forks, int timeout, int interval, int *times)
617 {
618 int child_exited = 0, status = 0;
619 int time_to_sleep, sleep_time;
620 struct timespec time_start, time_stop;
621
622 if (interval)
623 sleep_time = interval;
624 else if (timeout)
625 sleep_time = timeout;
626 else
627 sleep_time = 1000;
628
629 time_to_sleep = sleep_time;
630
631 while (!done) {
632 if (forks)
633 child_exited = waitpid(child_pid, &status, WNOHANG);
634 else
635 child_exited = !is_target_alive(&target, evsel_list->core.threads) ? 1 : 0;
636
637 if (child_exited)
638 break;
639
640 clock_gettime(CLOCK_MONOTONIC, &time_start);
641 if (!(evlist__poll(evsel_list, time_to_sleep) > 0)) { /* poll timeout or EINTR */
642 if (timeout || handle_interval(interval, times))
643 break;
644 time_to_sleep = sleep_time;
645 } else { /* fd revent */
646 process_evlist(evsel_list, interval);
647 clock_gettime(CLOCK_MONOTONIC, &time_stop);
648 compute_tts(&time_start, &time_stop, &time_to_sleep);
649 }
650 }
651
652 return status;
653 }
654
655 enum counter_recovery {
656 COUNTER_SKIP,
657 COUNTER_RETRY,
658 COUNTER_FATAL,
659 };
660
661 static enum counter_recovery stat_handle_error(struct evsel *counter)
662 {
663 char msg[BUFSIZ];
664 /*
665 * PPC returns ENXIO for HW counters until 2.6.37
666 * (behavior changed with commit b0a873e).
667 */
668 if (errno == EINVAL || errno == ENOSYS ||
669 errno == ENOENT || errno == EOPNOTSUPP ||
670 errno == ENXIO) {
671 if (verbose > 0)
672 ui__warning("%s event is not supported by the kernel.\n",
673 evsel__name(counter));
674 counter->supported = false;
675 /*
676 * errored is a sticky flag that means one of the counter's
677 * cpu event had a problem and needs to be reexamined.
678 */
679 counter->errored = true;
680
681 if ((counter->leader != counter) ||
682 !(counter->leader->core.nr_members > 1))
683 return COUNTER_SKIP;
684 } else if (evsel__fallback(counter, errno, msg, sizeof(msg))) {
685 if (verbose > 0)
686 ui__warning("%s\n", msg);
687 return COUNTER_RETRY;
688 } else if (target__has_per_thread(&target) &&
689 evsel_list->core.threads &&
690 evsel_list->core.threads->err_thread != -1) {
691 /*
692 * For global --per-thread case, skip current
693 * error thread.
694 */
695 if (!thread_map__remove(evsel_list->core.threads,
696 evsel_list->core.threads->err_thread)) {
697 evsel_list->core.threads->err_thread = -1;
698 return COUNTER_RETRY;
699 }
700 }
701
702 evsel__open_strerror(counter, &target, errno, msg, sizeof(msg));
703 ui__error("%s\n", msg);
704
705 if (child_pid != -1)
706 kill(child_pid, SIGTERM);
707 return COUNTER_FATAL;
708 }
709
710 static int __run_perf_stat(int argc, const char **argv, int run_idx)
711 {
712 int interval = stat_config.interval;
713 int times = stat_config.times;
714 int timeout = stat_config.timeout;
715 char msg[BUFSIZ];
716 unsigned long long t0, t1;
717 struct evsel *counter;
718 size_t l;
719 int status = 0;
720 const bool forks = (argc > 0);
721 bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false;
722 struct affinity affinity;
723 int i, cpu;
724 bool second_pass = false;
725
726 if (forks) {
727 if (evlist__prepare_workload(evsel_list, &target, argv, is_pipe, workload_exec_failed_signal) < 0) {
728 perror("failed to prepare workload");
729 return -1;
730 }
731 child_pid = evsel_list->workload.pid;
732 }
733
734 if (group)
735 evlist__set_leader(evsel_list);
736
737 if (affinity__setup(&affinity) < 0)
738 return -1;
739
740 evlist__for_each_cpu (evsel_list, i, cpu) {
741 affinity__set(&affinity, cpu);
742
743 evlist__for_each_entry(evsel_list, counter) {
744 if (evsel__cpu_iter_skip(counter, cpu))
745 continue;
746 if (counter->reset_group || counter->errored)
747 continue;
748 try_again:
749 if (create_perf_stat_counter(counter, &stat_config, &target,
750 counter->cpu_iter - 1) < 0) {
751
752 /*
753 * Weak group failed. We cannot just undo this here
754 * because earlier CPUs might be in group mode, and the kernel
755 * doesn't support mixing group and non group reads. Defer
756 * it to later.
757 * Don't close here because we're in the wrong affinity.
758 */
759 if ((errno == EINVAL || errno == EBADF) &&
760 counter->leader != counter &&
761 counter->weak_group) {
762 evlist__reset_weak_group(evsel_list, counter, false);
763 assert(counter->reset_group);
764 second_pass = true;
765 continue;
766 }
767
768 switch (stat_handle_error(counter)) {
769 case COUNTER_FATAL:
770 return -1;
771 case COUNTER_RETRY:
772 goto try_again;
773 case COUNTER_SKIP:
774 continue;
775 default:
776 break;
777 }
778
779 }
780 counter->supported = true;
781 }
782 }
783
784 if (second_pass) {
785 /*
786 * Now redo all the weak group after closing them,
787 * and also close errored counters.
788 */
789
790 evlist__for_each_cpu(evsel_list, i, cpu) {
791 affinity__set(&affinity, cpu);
792 /* First close errored or weak retry */
793 evlist__for_each_entry(evsel_list, counter) {
794 if (!counter->reset_group && !counter->errored)
795 continue;
796 if (evsel__cpu_iter_skip_no_inc(counter, cpu))
797 continue;
798 perf_evsel__close_cpu(&counter->core, counter->cpu_iter);
799 }
800 /* Now reopen weak */
801 evlist__for_each_entry(evsel_list, counter) {
802 if (!counter->reset_group && !counter->errored)
803 continue;
804 if (evsel__cpu_iter_skip(counter, cpu))
805 continue;
806 if (!counter->reset_group)
807 continue;
808 try_again_reset:
809 pr_debug2("reopening weak %s\n", evsel__name(counter));
810 if (create_perf_stat_counter(counter, &stat_config, &target,
811 counter->cpu_iter - 1) < 0) {
812
813 switch (stat_handle_error(counter)) {
814 case COUNTER_FATAL:
815 return -1;
816 case COUNTER_RETRY:
817 goto try_again_reset;
818 case COUNTER_SKIP:
819 continue;
820 default:
821 break;
822 }
823 }
824 counter->supported = true;
825 }
826 }
827 }
828 affinity__cleanup(&affinity);
829
830 evlist__for_each_entry(evsel_list, counter) {
831 if (!counter->supported) {
832 perf_evsel__free_fd(&counter->core);
833 continue;
834 }
835
836 l = strlen(counter->unit);
837 if (l > stat_config.unit_width)
838 stat_config.unit_width = l;
839
840 if (evsel__should_store_id(counter) &&
841 evsel__store_ids(counter, evsel_list))
842 return -1;
843 }
844
845 if (evlist__apply_filters(evsel_list, &counter)) {
846 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
847 counter->filter, evsel__name(counter), errno,
848 str_error_r(errno, msg, sizeof(msg)));
849 return -1;
850 }
851
852 if (STAT_RECORD) {
853 int err, fd = perf_data__fd(&perf_stat.data);
854
855 if (is_pipe) {
856 err = perf_header__write_pipe(perf_data__fd(&perf_stat.data));
857 } else {
858 err = perf_session__write_header(perf_stat.session, evsel_list,
859 fd, false);
860 }
861
862 if (err < 0)
863 return err;
864
865 err = perf_event__synthesize_stat_events(&stat_config, NULL, evsel_list,
866 process_synthesized_event, is_pipe);
867 if (err < 0)
868 return err;
869 }
870
871 /*
872 * Enable counters and exec the command:
873 */
874 t0 = rdclock();
875 clock_gettime(CLOCK_MONOTONIC, &ref_time);
876
877 if (forks) {
878 evlist__start_workload(evsel_list);
879 enable_counters();
880
881 if (interval || timeout || evlist__ctlfd_initialized(evsel_list))
882 status = dispatch_events(forks, timeout, interval, &times);
883 if (child_pid != -1) {
884 if (timeout)
885 kill(child_pid, SIGTERM);
886 wait4(child_pid, &status, 0, &stat_config.ru_data);
887 }
888
889 if (workload_exec_errno) {
890 const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
891 pr_err("Workload failed: %s\n", emsg);
892 return -1;
893 }
894
895 if (WIFSIGNALED(status))
896 psignal(WTERMSIG(status), argv[0]);
897 } else {
898 enable_counters();
899 status = dispatch_events(forks, timeout, interval, &times);
900 }
901
902 disable_counters();
903
904 t1 = rdclock();
905
906 if (stat_config.walltime_run_table)
907 stat_config.walltime_run[run_idx] = t1 - t0;
908
909 if (interval && stat_config.summary) {
910 stat_config.interval = 0;
911 stat_config.stop_read_counter = true;
912 init_stats(&walltime_nsecs_stats);
913 update_stats(&walltime_nsecs_stats, t1 - t0);
914
915 if (stat_config.aggr_mode == AGGR_GLOBAL)
916 evlist__save_aggr_prev_raw_counts(evsel_list);
917
918 evlist__copy_prev_raw_counts(evsel_list);
919 evlist__reset_prev_raw_counts(evsel_list);
920 runtime_stat_reset(&stat_config);
921 perf_stat__reset_shadow_per_stat(&rt_stat);
922 } else
923 update_stats(&walltime_nsecs_stats, t1 - t0);
924
925 /*
926 * Closing a group leader splits the group, and as we only disable
927 * group leaders, results in remaining events becoming enabled. To
928 * avoid arbitrary skew, we must read all counters before closing any
929 * group leaders.
930 */
931 read_counters(&(struct timespec) { .tv_nsec = t1-t0 });
932
933 /*
934 * We need to keep evsel_list alive, because it's processed
935 * later the evsel_list will be closed after.
936 */
937 if (!STAT_RECORD)
938 evlist__close(evsel_list);
939
940 return WEXITSTATUS(status);
941 }
942
943 static int run_perf_stat(int argc, const char **argv, int run_idx)
944 {
945 int ret;
946
947 if (pre_cmd) {
948 ret = system(pre_cmd);
949 if (ret)
950 return ret;
951 }
952
953 if (sync_run)
954 sync();
955
956 ret = __run_perf_stat(argc, argv, run_idx);
957 if (ret)
958 return ret;
959
960 if (post_cmd) {
961 ret = system(post_cmd);
962 if (ret)
963 return ret;
964 }
965
966 return ret;
967 }
968
969 static void print_counters(struct timespec *ts, int argc, const char **argv)
970 {
971 /* Do not print anything if we record to the pipe. */
972 if (STAT_RECORD && perf_stat.data.is_pipe)
973 return;
974 if (stat_config.quiet)
975 return;
976
977 evlist__print_counters(evsel_list, &stat_config, &target, ts, argc, argv);
978 }
979
980 static volatile int signr = -1;
981
982 static void skip_signal(int signo)
983 {
984 if ((child_pid == -1) || stat_config.interval)
985 done = 1;
986
987 signr = signo;
988 /*
989 * render child_pid harmless
990 * won't send SIGTERM to a random
991 * process in case of race condition
992 * and fast PID recycling
993 */
994 child_pid = -1;
995 }
996
997 static void sig_atexit(void)
998 {
999 sigset_t set, oset;
1000
1001 /*
1002 * avoid race condition with SIGCHLD handler
1003 * in skip_signal() which is modifying child_pid
1004 * goal is to avoid send SIGTERM to a random
1005 * process
1006 */
1007 sigemptyset(&set);
1008 sigaddset(&set, SIGCHLD);
1009 sigprocmask(SIG_BLOCK, &set, &oset);
1010
1011 if (child_pid != -1)
1012 kill(child_pid, SIGTERM);
1013
1014 sigprocmask(SIG_SETMASK, &oset, NULL);
1015
1016 if (signr == -1)
1017 return;
1018
1019 signal(signr, SIG_DFL);
1020 kill(getpid(), signr);
1021 }
1022
1023 void perf_stat__set_big_num(int set)
1024 {
1025 stat_config.big_num = (set != 0);
1026 }
1027
1028 static int stat__set_big_num(const struct option *opt __maybe_unused,
1029 const char *s __maybe_unused, int unset)
1030 {
1031 big_num_opt = unset ? 0 : 1;
1032 perf_stat__set_big_num(!unset);
1033 return 0;
1034 }
1035
1036 static int enable_metric_only(const struct option *opt __maybe_unused,
1037 const char *s __maybe_unused, int unset)
1038 {
1039 force_metric_only = true;
1040 stat_config.metric_only = !unset;
1041 return 0;
1042 }
1043
1044 static int parse_metric_groups(const struct option *opt,
1045 const char *str,
1046 int unset __maybe_unused)
1047 {
1048 return metricgroup__parse_groups(opt, str,
1049 stat_config.metric_no_group,
1050 stat_config.metric_no_merge,
1051 &stat_config.metric_events);
1052 }
1053
1054 static int parse_control_option(const struct option *opt,
1055 const char *str,
1056 int unset __maybe_unused)
1057 {
1058 struct perf_stat_config *config = opt->value;
1059
1060 return evlist__parse_control(str, &config->ctl_fd, &config->ctl_fd_ack, &config->ctl_fd_close);
1061 }
1062
1063 static int parse_stat_cgroups(const struct option *opt,
1064 const char *str, int unset)
1065 {
1066 if (stat_config.cgroup_list) {
1067 pr_err("--cgroup and --for-each-cgroup cannot be used together\n");
1068 return -1;
1069 }
1070
1071 return parse_cgroups(opt, str, unset);
1072 }
1073
1074 static struct option stat_options[] = {
1075 OPT_BOOLEAN('T', "transaction", &transaction_run,
1076 "hardware transaction statistics"),
1077 OPT_CALLBACK('e', "event", &evsel_list, "event",
1078 "event selector. use 'perf list' to list available events",
1079 parse_events_option),
1080 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1081 "event filter", parse_filter),
1082 OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit,
1083 "child tasks do not inherit counters"),
1084 OPT_STRING('p', "pid", &target.pid, "pid",
1085 "stat events on existing process id"),
1086 OPT_STRING('t', "tid", &target.tid, "tid",
1087 "stat events on existing thread id"),
1088 OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1089 "system-wide collection from all CPUs"),
1090 OPT_BOOLEAN('g', "group", &group,
1091 "put the counters into a counter group"),
1092 OPT_BOOLEAN(0, "scale", &stat_config.scale,
1093 "Use --no-scale to disable counter scaling for multiplexing"),
1094 OPT_INCR('v', "verbose", &verbose,
1095 "be more verbose (show counter open errors, etc)"),
1096 OPT_INTEGER('r', "repeat", &stat_config.run_count,
1097 "repeat command and print average + stddev (max: 100, forever: 0)"),
1098 OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table,
1099 "display details about each run (only with -r option)"),
1100 OPT_BOOLEAN('n', "null", &stat_config.null_run,
1101 "null run - dont start any counters"),
1102 OPT_INCR('d', "detailed", &detailed_run,
1103 "detailed run - start a lot of events"),
1104 OPT_BOOLEAN('S', "sync", &sync_run,
1105 "call sync() before starting a run"),
1106 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1107 "print large numbers with thousands\' separators",
1108 stat__set_big_num),
1109 OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1110 "list of cpus to monitor in system-wide"),
1111 OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
1112 "disable CPU count aggregation", AGGR_NONE),
1113 OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"),
1114 OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator",
1115 "print counts with custom separator"),
1116 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1117 "monitor event in cgroup name only", parse_stat_cgroups),
1118 OPT_STRING(0, "for-each-cgroup", &stat_config.cgroup_list, "name",
1119 "expand events for each cgroup"),
1120 OPT_STRING('o', "output", &output_name, "file", "output file name"),
1121 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1122 OPT_INTEGER(0, "log-fd", &output_fd,
1123 "log output to fd, instead of stderr"),
1124 OPT_STRING(0, "pre", &pre_cmd, "command",
1125 "command to run prior to the measured command"),
1126 OPT_STRING(0, "post", &post_cmd, "command",
1127 "command to run after to the measured command"),
1128 OPT_UINTEGER('I', "interval-print", &stat_config.interval,
1129 "print counts at regular interval in ms "
1130 "(overhead is possible for values <= 100ms)"),
1131 OPT_INTEGER(0, "interval-count", &stat_config.times,
1132 "print counts for fixed number of times"),
1133 OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear,
1134 "clear screen in between new interval"),
1135 OPT_UINTEGER(0, "timeout", &stat_config.timeout,
1136 "stop workload and print counts after a timeout period in ms (>= 10ms)"),
1137 OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
1138 "aggregate counts per processor socket", AGGR_SOCKET),
1139 OPT_SET_UINT(0, "per-die", &stat_config.aggr_mode,
1140 "aggregate counts per processor die", AGGR_DIE),
1141 OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
1142 "aggregate counts per physical processor core", AGGR_CORE),
1143 OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
1144 "aggregate counts per thread", AGGR_THREAD),
1145 OPT_SET_UINT(0, "per-node", &stat_config.aggr_mode,
1146 "aggregate counts per numa node", AGGR_NODE),
1147 OPT_INTEGER('D', "delay", &stat_config.initial_delay,
1148 "ms to wait before starting measurement after program start (-1: start with events disabled)"),
1149 OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL,
1150 "Only print computed metrics. No raw values", enable_metric_only),
1151 OPT_BOOLEAN(0, "metric-no-group", &stat_config.metric_no_group,
1152 "don't group metric events, impacts multiplexing"),
1153 OPT_BOOLEAN(0, "metric-no-merge", &stat_config.metric_no_merge,
1154 "don't try to share events between metrics in a group"),
1155 OPT_BOOLEAN(0, "topdown", &topdown_run,
1156 "measure topdown level 1 statistics"),
1157 OPT_BOOLEAN(0, "smi-cost", &smi_cost,
1158 "measure SMI cost"),
1159 OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
1160 "monitor specified metrics or metric groups (separated by ,)",
1161 parse_metric_groups),
1162 OPT_BOOLEAN_FLAG(0, "all-kernel", &stat_config.all_kernel,
1163 "Configure all used events to run in kernel space.",
1164 PARSE_OPT_EXCLUSIVE),
1165 OPT_BOOLEAN_FLAG(0, "all-user", &stat_config.all_user,
1166 "Configure all used events to run in user space.",
1167 PARSE_OPT_EXCLUSIVE),
1168 OPT_BOOLEAN(0, "percore-show-thread", &stat_config.percore_show_thread,
1169 "Use with 'percore' event qualifier to show the event "
1170 "counts of one hardware thread by sum up total hardware "
1171 "threads of same physical core"),
1172 OPT_BOOLEAN(0, "summary", &stat_config.summary,
1173 "print summary for interval mode"),
1174 OPT_BOOLEAN(0, "quiet", &stat_config.quiet,
1175 "don't print output (useful with record)"),
1176 #ifdef HAVE_LIBPFM
1177 OPT_CALLBACK(0, "pfm-events", &evsel_list, "event",
1178 "libpfm4 event selector. use 'perf list' to list available events",
1179 parse_libpfm_events_option),
1180 #endif
1181 OPT_CALLBACK(0, "control", &stat_config, "fd:ctl-fd[,ack-fd] or fifo:ctl-fifo[,ack-fifo]",
1182 "Listen on ctl-fd descriptor for command to control measurement ('enable': enable events, 'disable': disable events).\n"
1183 "\t\t\t Optionally send control command completion ('ack\\n') to ack-fd descriptor.\n"
1184 "\t\t\t Alternatively, ctl-fifo / ack-fifo will be opened and used as ctl-fd / ack-fd.",
1185 parse_control_option),
1186 OPT_END()
1187 };
1188
1189 static struct aggr_cpu_id perf_stat__get_socket(struct perf_stat_config *config __maybe_unused,
1190 struct perf_cpu_map *map, int cpu)
1191 {
1192 return cpu_map__get_socket(map, cpu, NULL);
1193 }
1194
1195 static struct aggr_cpu_id perf_stat__get_die(struct perf_stat_config *config __maybe_unused,
1196 struct perf_cpu_map *map, int cpu)
1197 {
1198 return cpu_map__get_die(map, cpu, NULL);
1199 }
1200
1201 static struct aggr_cpu_id perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
1202 struct perf_cpu_map *map, int cpu)
1203 {
1204 return cpu_map__get_core(map, cpu, NULL);
1205 }
1206
1207 static struct aggr_cpu_id perf_stat__get_node(struct perf_stat_config *config __maybe_unused,
1208 struct perf_cpu_map *map, int cpu)
1209 {
1210 return cpu_map__get_node(map, cpu, NULL);
1211 }
1212
1213 static struct aggr_cpu_id perf_stat__get_aggr(struct perf_stat_config *config,
1214 aggr_get_id_t get_id, struct perf_cpu_map *map, int idx)
1215 {
1216 int cpu;
1217 struct aggr_cpu_id id = cpu_map__empty_aggr_cpu_id();
1218
1219 if (idx >= map->nr)
1220 return id;
1221
1222 cpu = map->map[idx];
1223
1224 if (cpu_map__aggr_cpu_id_is_empty(config->cpus_aggr_map->map[cpu]))
1225 config->cpus_aggr_map->map[cpu] = get_id(config, map, idx);
1226
1227 id = config->cpus_aggr_map->map[cpu];
1228 return id;
1229 }
1230
1231 static struct aggr_cpu_id perf_stat__get_socket_cached(struct perf_stat_config *config,
1232 struct perf_cpu_map *map, int idx)
1233 {
1234 return perf_stat__get_aggr(config, perf_stat__get_socket, map, idx);
1235 }
1236
1237 static struct aggr_cpu_id perf_stat__get_die_cached(struct perf_stat_config *config,
1238 struct perf_cpu_map *map, int idx)
1239 {
1240 return perf_stat__get_aggr(config, perf_stat__get_die, map, idx);
1241 }
1242
1243 static struct aggr_cpu_id perf_stat__get_core_cached(struct perf_stat_config *config,
1244 struct perf_cpu_map *map, int idx)
1245 {
1246 return perf_stat__get_aggr(config, perf_stat__get_core, map, idx);
1247 }
1248
1249 static struct aggr_cpu_id perf_stat__get_node_cached(struct perf_stat_config *config,
1250 struct perf_cpu_map *map, int idx)
1251 {
1252 return perf_stat__get_aggr(config, perf_stat__get_node, map, idx);
1253 }
1254
1255 static bool term_percore_set(void)
1256 {
1257 struct evsel *counter;
1258
1259 evlist__for_each_entry(evsel_list, counter) {
1260 if (counter->percore)
1261 return true;
1262 }
1263
1264 return false;
1265 }
1266
1267 static int perf_stat_init_aggr_mode(void)
1268 {
1269 int nr;
1270
1271 switch (stat_config.aggr_mode) {
1272 case AGGR_SOCKET:
1273 if (cpu_map__build_socket_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1274 perror("cannot build socket map");
1275 return -1;
1276 }
1277 stat_config.aggr_get_id = perf_stat__get_socket_cached;
1278 break;
1279 case AGGR_DIE:
1280 if (cpu_map__build_die_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1281 perror("cannot build die map");
1282 return -1;
1283 }
1284 stat_config.aggr_get_id = perf_stat__get_die_cached;
1285 break;
1286 case AGGR_CORE:
1287 if (cpu_map__build_core_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1288 perror("cannot build core map");
1289 return -1;
1290 }
1291 stat_config.aggr_get_id = perf_stat__get_core_cached;
1292 break;
1293 case AGGR_NODE:
1294 if (cpu_map__build_node_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1295 perror("cannot build core map");
1296 return -1;
1297 }
1298 stat_config.aggr_get_id = perf_stat__get_node_cached;
1299 break;
1300 case AGGR_NONE:
1301 if (term_percore_set()) {
1302 if (cpu_map__build_core_map(evsel_list->core.cpus,
1303 &stat_config.aggr_map)) {
1304 perror("cannot build core map");
1305 return -1;
1306 }
1307 stat_config.aggr_get_id = perf_stat__get_core_cached;
1308 }
1309 break;
1310 case AGGR_GLOBAL:
1311 case AGGR_THREAD:
1312 case AGGR_UNSET:
1313 default:
1314 break;
1315 }
1316
1317 /*
1318 * The evsel_list->cpus is the base we operate on,
1319 * taking the highest cpu number to be the size of
1320 * the aggregation translate cpumap.
1321 */
1322 nr = perf_cpu_map__max(evsel_list->core.cpus);
1323 stat_config.cpus_aggr_map = cpu_aggr_map__empty_new(nr + 1);
1324 return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
1325 }
1326
1327 static void cpu_aggr_map__delete(struct cpu_aggr_map *map)
1328 {
1329 if (map) {
1330 WARN_ONCE(refcount_read(&map->refcnt) != 0,
1331 "cpu_aggr_map refcnt unbalanced\n");
1332 free(map);
1333 }
1334 }
1335
1336 static void cpu_aggr_map__put(struct cpu_aggr_map *map)
1337 {
1338 if (map && refcount_dec_and_test(&map->refcnt))
1339 cpu_aggr_map__delete(map);
1340 }
1341
1342 static void perf_stat__exit_aggr_mode(void)
1343 {
1344 cpu_aggr_map__put(stat_config.aggr_map);
1345 cpu_aggr_map__put(stat_config.cpus_aggr_map);
1346 stat_config.aggr_map = NULL;
1347 stat_config.cpus_aggr_map = NULL;
1348 }
1349
1350 static inline int perf_env__get_cpu(struct perf_env *env, struct perf_cpu_map *map, int idx)
1351 {
1352 int cpu;
1353
1354 if (idx > map->nr)
1355 return -1;
1356
1357 cpu = map->map[idx];
1358
1359 if (cpu >= env->nr_cpus_avail)
1360 return -1;
1361
1362 return cpu;
1363 }
1364
1365 static struct aggr_cpu_id perf_env__get_socket(struct perf_cpu_map *map, int idx, void *data)
1366 {
1367 struct perf_env *env = data;
1368 int cpu = perf_env__get_cpu(env, map, idx);
1369 struct aggr_cpu_id id = cpu_map__empty_aggr_cpu_id();
1370
1371 if (cpu != -1)
1372 id.socket = env->cpu[cpu].socket_id;
1373
1374 return id;
1375 }
1376
1377 static struct aggr_cpu_id perf_env__get_die(struct perf_cpu_map *map, int idx, void *data)
1378 {
1379 struct perf_env *env = data;
1380 struct aggr_cpu_id id = cpu_map__empty_aggr_cpu_id();
1381 int cpu = perf_env__get_cpu(env, map, idx);
1382
1383 if (cpu != -1) {
1384 /*
1385 * die_id is relative to socket, so start
1386 * with the socket ID and then add die to
1387 * make a unique ID.
1388 */
1389 id.socket = env->cpu[cpu].socket_id;
1390 id.die = env->cpu[cpu].die_id;
1391 }
1392
1393 return id;
1394 }
1395
1396 static struct aggr_cpu_id perf_env__get_core(struct perf_cpu_map *map, int idx, void *data)
1397 {
1398 struct perf_env *env = data;
1399 struct aggr_cpu_id id = cpu_map__empty_aggr_cpu_id();
1400 int cpu = perf_env__get_cpu(env, map, idx);
1401
1402 if (cpu != -1) {
1403 /*
1404 * core_id is relative to socket and die,
1405 * we need a global id. So we set
1406 * socket, die id and core id
1407 */
1408 id.socket = env->cpu[cpu].socket_id;
1409 id.die = env->cpu[cpu].die_id;
1410 id.core = env->cpu[cpu].core_id;
1411 }
1412
1413 return id;
1414 }
1415
1416 static struct aggr_cpu_id perf_env__get_node(struct perf_cpu_map *map, int idx, void *data)
1417 {
1418 int cpu = perf_env__get_cpu(data, map, idx);
1419 struct aggr_cpu_id id = cpu_map__empty_aggr_cpu_id();
1420
1421 id.node = perf_env__numa_node(data, cpu);
1422 return id;
1423 }
1424
1425 static int perf_env__build_socket_map(struct perf_env *env, struct perf_cpu_map *cpus,
1426 struct cpu_aggr_map **sockp)
1427 {
1428 return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
1429 }
1430
1431 static int perf_env__build_die_map(struct perf_env *env, struct perf_cpu_map *cpus,
1432 struct cpu_aggr_map **diep)
1433 {
1434 return cpu_map__build_map(cpus, diep, perf_env__get_die, env);
1435 }
1436
1437 static int perf_env__build_core_map(struct perf_env *env, struct perf_cpu_map *cpus,
1438 struct cpu_aggr_map **corep)
1439 {
1440 return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
1441 }
1442
1443 static int perf_env__build_node_map(struct perf_env *env, struct perf_cpu_map *cpus,
1444 struct cpu_aggr_map **nodep)
1445 {
1446 return cpu_map__build_map(cpus, nodep, perf_env__get_node, env);
1447 }
1448
1449 static struct aggr_cpu_id perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused,
1450 struct perf_cpu_map *map, int idx)
1451 {
1452 return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
1453 }
1454 static struct aggr_cpu_id perf_stat__get_die_file(struct perf_stat_config *config __maybe_unused,
1455 struct perf_cpu_map *map, int idx)
1456 {
1457 return perf_env__get_die(map, idx, &perf_stat.session->header.env);
1458 }
1459
1460 static struct aggr_cpu_id perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused,
1461 struct perf_cpu_map *map, int idx)
1462 {
1463 return perf_env__get_core(map, idx, &perf_stat.session->header.env);
1464 }
1465
1466 static struct aggr_cpu_id perf_stat__get_node_file(struct perf_stat_config *config __maybe_unused,
1467 struct perf_cpu_map *map, int idx)
1468 {
1469 return perf_env__get_node(map, idx, &perf_stat.session->header.env);
1470 }
1471
1472 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
1473 {
1474 struct perf_env *env = &st->session->header.env;
1475
1476 switch (stat_config.aggr_mode) {
1477 case AGGR_SOCKET:
1478 if (perf_env__build_socket_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1479 perror("cannot build socket map");
1480 return -1;
1481 }
1482 stat_config.aggr_get_id = perf_stat__get_socket_file;
1483 break;
1484 case AGGR_DIE:
1485 if (perf_env__build_die_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1486 perror("cannot build die map");
1487 return -1;
1488 }
1489 stat_config.aggr_get_id = perf_stat__get_die_file;
1490 break;
1491 case AGGR_CORE:
1492 if (perf_env__build_core_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1493 perror("cannot build core map");
1494 return -1;
1495 }
1496 stat_config.aggr_get_id = perf_stat__get_core_file;
1497 break;
1498 case AGGR_NODE:
1499 if (perf_env__build_node_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1500 perror("cannot build core map");
1501 return -1;
1502 }
1503 stat_config.aggr_get_id = perf_stat__get_node_file;
1504 break;
1505 case AGGR_NONE:
1506 case AGGR_GLOBAL:
1507 case AGGR_THREAD:
1508 case AGGR_UNSET:
1509 default:
1510 break;
1511 }
1512
1513 return 0;
1514 }
1515
1516 /*
1517 * Add default attributes, if there were no attributes specified or
1518 * if -d/--detailed, -d -d or -d -d -d is used:
1519 */
1520 static int add_default_attributes(void)
1521 {
1522 int err;
1523 struct perf_event_attr default_attrs0[] = {
1524
1525 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
1526 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
1527 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
1528 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
1529
1530 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
1531 };
1532 struct perf_event_attr frontend_attrs[] = {
1533 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1534 };
1535 struct perf_event_attr backend_attrs[] = {
1536 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
1537 };
1538 struct perf_event_attr default_attrs1[] = {
1539 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
1540 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
1541 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
1542
1543 };
1544
1545 /*
1546 * Detailed stats (-d), covering the L1 and last level data caches:
1547 */
1548 struct perf_event_attr detailed_attrs[] = {
1549
1550 { .type = PERF_TYPE_HW_CACHE,
1551 .config =
1552 PERF_COUNT_HW_CACHE_L1D << 0 |
1553 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1554 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1555
1556 { .type = PERF_TYPE_HW_CACHE,
1557 .config =
1558 PERF_COUNT_HW_CACHE_L1D << 0 |
1559 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1560 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1561
1562 { .type = PERF_TYPE_HW_CACHE,
1563 .config =
1564 PERF_COUNT_HW_CACHE_LL << 0 |
1565 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1566 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1567
1568 { .type = PERF_TYPE_HW_CACHE,
1569 .config =
1570 PERF_COUNT_HW_CACHE_LL << 0 |
1571 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1572 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1573 };
1574
1575 /*
1576 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1577 */
1578 struct perf_event_attr very_detailed_attrs[] = {
1579
1580 { .type = PERF_TYPE_HW_CACHE,
1581 .config =
1582 PERF_COUNT_HW_CACHE_L1I << 0 |
1583 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1584 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1585
1586 { .type = PERF_TYPE_HW_CACHE,
1587 .config =
1588 PERF_COUNT_HW_CACHE_L1I << 0 |
1589 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1590 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1591
1592 { .type = PERF_TYPE_HW_CACHE,
1593 .config =
1594 PERF_COUNT_HW_CACHE_DTLB << 0 |
1595 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1596 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1597
1598 { .type = PERF_TYPE_HW_CACHE,
1599 .config =
1600 PERF_COUNT_HW_CACHE_DTLB << 0 |
1601 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1602 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1603
1604 { .type = PERF_TYPE_HW_CACHE,
1605 .config =
1606 PERF_COUNT_HW_CACHE_ITLB << 0 |
1607 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1608 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1609
1610 { .type = PERF_TYPE_HW_CACHE,
1611 .config =
1612 PERF_COUNT_HW_CACHE_ITLB << 0 |
1613 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1614 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1615
1616 };
1617
1618 /*
1619 * Very, very detailed stats (-d -d -d), adding prefetch events:
1620 */
1621 struct perf_event_attr very_very_detailed_attrs[] = {
1622
1623 { .type = PERF_TYPE_HW_CACHE,
1624 .config =
1625 PERF_COUNT_HW_CACHE_L1D << 0 |
1626 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1627 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1628
1629 { .type = PERF_TYPE_HW_CACHE,
1630 .config =
1631 PERF_COUNT_HW_CACHE_L1D << 0 |
1632 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1633 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1634 };
1635 struct parse_events_error errinfo;
1636
1637 /* Set attrs if no event is selected and !null_run: */
1638 if (stat_config.null_run)
1639 return 0;
1640
1641 bzero(&errinfo, sizeof(errinfo));
1642 if (transaction_run) {
1643 /* Handle -T as -M transaction. Once platform specific metrics
1644 * support has been added to the json files, all archictures
1645 * will use this approach. To determine transaction support
1646 * on an architecture test for such a metric name.
1647 */
1648 if (metricgroup__has_metric("transaction")) {
1649 struct option opt = { .value = &evsel_list };
1650
1651 return metricgroup__parse_groups(&opt, "transaction",
1652 stat_config.metric_no_group,
1653 stat_config.metric_no_merge,
1654 &stat_config.metric_events);
1655 }
1656
1657 if (pmu_have_event("cpu", "cycles-ct") &&
1658 pmu_have_event("cpu", "el-start"))
1659 err = parse_events(evsel_list, transaction_attrs,
1660 &errinfo);
1661 else
1662 err = parse_events(evsel_list,
1663 transaction_limited_attrs,
1664 &errinfo);
1665 if (err) {
1666 fprintf(stderr, "Cannot set up transaction events\n");
1667 parse_events_print_error(&errinfo, transaction_attrs);
1668 return -1;
1669 }
1670 return 0;
1671 }
1672
1673 if (smi_cost) {
1674 int smi;
1675
1676 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
1677 fprintf(stderr, "freeze_on_smi is not supported.\n");
1678 return -1;
1679 }
1680
1681 if (!smi) {
1682 if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) {
1683 fprintf(stderr, "Failed to set freeze_on_smi.\n");
1684 return -1;
1685 }
1686 smi_reset = true;
1687 }
1688
1689 if (pmu_have_event("msr", "aperf") &&
1690 pmu_have_event("msr", "smi")) {
1691 if (!force_metric_only)
1692 stat_config.metric_only = true;
1693 err = parse_events(evsel_list, smi_cost_attrs, &errinfo);
1694 } else {
1695 fprintf(stderr, "To measure SMI cost, it needs "
1696 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n");
1697 parse_events_print_error(&errinfo, smi_cost_attrs);
1698 return -1;
1699 }
1700 if (err) {
1701 parse_events_print_error(&errinfo, smi_cost_attrs);
1702 fprintf(stderr, "Cannot set up SMI cost events\n");
1703 return -1;
1704 }
1705 return 0;
1706 }
1707
1708 if (topdown_run) {
1709 char *str = NULL;
1710 bool warn = false;
1711
1712 if (!force_metric_only)
1713 stat_config.metric_only = true;
1714
1715 if (topdown_filter_events(topdown_metric_attrs, &str, 1) < 0) {
1716 pr_err("Out of memory\n");
1717 return -1;
1718 }
1719 if (topdown_metric_attrs[0] && str) {
1720 if (!stat_config.interval && !stat_config.metric_only) {
1721 fprintf(stat_config.output,
1722 "Topdown accuracy may decrease when measuring long periods.\n"
1723 "Please print the result regularly, e.g. -I1000\n");
1724 }
1725 goto setup_metrics;
1726 }
1727
1728 zfree(&str);
1729
1730 if (stat_config.aggr_mode != AGGR_GLOBAL &&
1731 stat_config.aggr_mode != AGGR_CORE) {
1732 pr_err("top down event configuration requires --per-core mode\n");
1733 return -1;
1734 }
1735 stat_config.aggr_mode = AGGR_CORE;
1736 if (nr_cgroups || !target__has_cpu(&target)) {
1737 pr_err("top down event configuration requires system-wide mode (-a)\n");
1738 return -1;
1739 }
1740
1741 if (topdown_filter_events(topdown_attrs, &str,
1742 arch_topdown_check_group(&warn)) < 0) {
1743 pr_err("Out of memory\n");
1744 return -1;
1745 }
1746 if (topdown_attrs[0] && str) {
1747 if (warn)
1748 arch_topdown_group_warn();
1749 setup_metrics:
1750 err = parse_events(evsel_list, str, &errinfo);
1751 if (err) {
1752 fprintf(stderr,
1753 "Cannot set up top down events %s: %d\n",
1754 str, err);
1755 parse_events_print_error(&errinfo, str);
1756 free(str);
1757 return -1;
1758 }
1759 } else {
1760 fprintf(stderr, "System does not support topdown\n");
1761 return -1;
1762 }
1763 free(str);
1764 }
1765
1766 if (!evsel_list->core.nr_entries) {
1767 if (target__has_cpu(&target))
1768 default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
1769
1770 if (evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
1771 return -1;
1772 if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
1773 if (evlist__add_default_attrs(evsel_list, frontend_attrs) < 0)
1774 return -1;
1775 }
1776 if (pmu_have_event("cpu", "stalled-cycles-backend")) {
1777 if (evlist__add_default_attrs(evsel_list, backend_attrs) < 0)
1778 return -1;
1779 }
1780 if (evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
1781 return -1;
1782 }
1783
1784 /* Detailed events get appended to the event list: */
1785
1786 if (detailed_run < 1)
1787 return 0;
1788
1789 /* Append detailed run extra attributes: */
1790 if (evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1791 return -1;
1792
1793 if (detailed_run < 2)
1794 return 0;
1795
1796 /* Append very detailed run extra attributes: */
1797 if (evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1798 return -1;
1799
1800 if (detailed_run < 3)
1801 return 0;
1802
1803 /* Append very, very detailed run extra attributes: */
1804 return evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1805 }
1806
1807 static const char * const stat_record_usage[] = {
1808 "perf stat record [<options>]",
1809 NULL,
1810 };
1811
1812 static void init_features(struct perf_session *session)
1813 {
1814 int feat;
1815
1816 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
1817 perf_header__set_feat(&session->header, feat);
1818
1819 perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT);
1820 perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
1821 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
1822 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
1823 perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
1824 }
1825
1826 static int __cmd_record(int argc, const char **argv)
1827 {
1828 struct perf_session *session;
1829 struct perf_data *data = &perf_stat.data;
1830
1831 argc = parse_options(argc, argv, stat_options, stat_record_usage,
1832 PARSE_OPT_STOP_AT_NON_OPTION);
1833
1834 if (output_name)
1835 data->path = output_name;
1836
1837 if (stat_config.run_count != 1 || forever) {
1838 pr_err("Cannot use -r option with perf stat record.\n");
1839 return -1;
1840 }
1841
1842 session = perf_session__new(data, false, NULL);
1843 if (IS_ERR(session)) {
1844 pr_err("Perf session creation failed\n");
1845 return PTR_ERR(session);
1846 }
1847
1848 init_features(session);
1849
1850 session->evlist = evsel_list;
1851 perf_stat.session = session;
1852 perf_stat.record = true;
1853 return argc;
1854 }
1855
1856 static int process_stat_round_event(struct perf_session *session,
1857 union perf_event *event)
1858 {
1859 struct perf_record_stat_round *stat_round = &event->stat_round;
1860 struct evsel *counter;
1861 struct timespec tsh, *ts = NULL;
1862 const char **argv = session->header.env.cmdline_argv;
1863 int argc = session->header.env.nr_cmdline;
1864
1865 evlist__for_each_entry(evsel_list, counter)
1866 perf_stat_process_counter(&stat_config, counter);
1867
1868 if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
1869 update_stats(&walltime_nsecs_stats, stat_round->time);
1870
1871 if (stat_config.interval && stat_round->time) {
1872 tsh.tv_sec = stat_round->time / NSEC_PER_SEC;
1873 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
1874 ts = &tsh;
1875 }
1876
1877 print_counters(ts, argc, argv);
1878 return 0;
1879 }
1880
1881 static
1882 int process_stat_config_event(struct perf_session *session,
1883 union perf_event *event)
1884 {
1885 struct perf_tool *tool = session->tool;
1886 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1887
1888 perf_event__read_stat_config(&stat_config, &event->stat_config);
1889
1890 if (perf_cpu_map__empty(st->cpus)) {
1891 if (st->aggr_mode != AGGR_UNSET)
1892 pr_warning("warning: processing task data, aggregation mode not set\n");
1893 return 0;
1894 }
1895
1896 if (st->aggr_mode != AGGR_UNSET)
1897 stat_config.aggr_mode = st->aggr_mode;
1898
1899 if (perf_stat.data.is_pipe)
1900 perf_stat_init_aggr_mode();
1901 else
1902 perf_stat_init_aggr_mode_file(st);
1903
1904 return 0;
1905 }
1906
1907 static int set_maps(struct perf_stat *st)
1908 {
1909 if (!st->cpus || !st->threads)
1910 return 0;
1911
1912 if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
1913 return -EINVAL;
1914
1915 perf_evlist__set_maps(&evsel_list->core, st->cpus, st->threads);
1916
1917 if (evlist__alloc_stats(evsel_list, true))
1918 return -ENOMEM;
1919
1920 st->maps_allocated = true;
1921 return 0;
1922 }
1923
1924 static
1925 int process_thread_map_event(struct perf_session *session,
1926 union perf_event *event)
1927 {
1928 struct perf_tool *tool = session->tool;
1929 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1930
1931 if (st->threads) {
1932 pr_warning("Extra thread map event, ignoring.\n");
1933 return 0;
1934 }
1935
1936 st->threads = thread_map__new_event(&event->thread_map);
1937 if (!st->threads)
1938 return -ENOMEM;
1939
1940 return set_maps(st);
1941 }
1942
1943 static
1944 int process_cpu_map_event(struct perf_session *session,
1945 union perf_event *event)
1946 {
1947 struct perf_tool *tool = session->tool;
1948 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1949 struct perf_cpu_map *cpus;
1950
1951 if (st->cpus) {
1952 pr_warning("Extra cpu map event, ignoring.\n");
1953 return 0;
1954 }
1955
1956 cpus = cpu_map__new_data(&event->cpu_map.data);
1957 if (!cpus)
1958 return -ENOMEM;
1959
1960 st->cpus = cpus;
1961 return set_maps(st);
1962 }
1963
1964 static const char * const stat_report_usage[] = {
1965 "perf stat report [<options>]",
1966 NULL,
1967 };
1968
1969 static struct perf_stat perf_stat = {
1970 .tool = {
1971 .attr = perf_event__process_attr,
1972 .event_update = perf_event__process_event_update,
1973 .thread_map = process_thread_map_event,
1974 .cpu_map = process_cpu_map_event,
1975 .stat_config = process_stat_config_event,
1976 .stat = perf_event__process_stat_event,
1977 .stat_round = process_stat_round_event,
1978 },
1979 .aggr_mode = AGGR_UNSET,
1980 };
1981
1982 static int __cmd_report(int argc, const char **argv)
1983 {
1984 struct perf_session *session;
1985 const struct option options[] = {
1986 OPT_STRING('i', "input", &input_name, "file", "input file name"),
1987 OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
1988 "aggregate counts per processor socket", AGGR_SOCKET),
1989 OPT_SET_UINT(0, "per-die", &perf_stat.aggr_mode,
1990 "aggregate counts per processor die", AGGR_DIE),
1991 OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
1992 "aggregate counts per physical processor core", AGGR_CORE),
1993 OPT_SET_UINT(0, "per-node", &perf_stat.aggr_mode,
1994 "aggregate counts per numa node", AGGR_NODE),
1995 OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
1996 "disable CPU count aggregation", AGGR_NONE),
1997 OPT_END()
1998 };
1999 struct stat st;
2000 int ret;
2001
2002 argc = parse_options(argc, argv, options, stat_report_usage, 0);
2003
2004 if (!input_name || !strlen(input_name)) {
2005 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
2006 input_name = "-";
2007 else
2008 input_name = "perf.data";
2009 }
2010
2011 perf_stat.data.path = input_name;
2012 perf_stat.data.mode = PERF_DATA_MODE_READ;
2013
2014 session = perf_session__new(&perf_stat.data, false, &perf_stat.tool);
2015 if (IS_ERR(session))
2016 return PTR_ERR(session);
2017
2018 perf_stat.session = session;
2019 stat_config.output = stderr;
2020 evsel_list = session->evlist;
2021
2022 ret = perf_session__process_events(session);
2023 if (ret)
2024 return ret;
2025
2026 perf_session__delete(session);
2027 return 0;
2028 }
2029
2030 static void setup_system_wide(int forks)
2031 {
2032 /*
2033 * Make system wide (-a) the default target if
2034 * no target was specified and one of following
2035 * conditions is met:
2036 *
2037 * - there's no workload specified
2038 * - there is workload specified but all requested
2039 * events are system wide events
2040 */
2041 if (!target__none(&target))
2042 return;
2043
2044 if (!forks)
2045 target.system_wide = true;
2046 else {
2047 struct evsel *counter;
2048
2049 evlist__for_each_entry(evsel_list, counter) {
2050 if (!counter->core.system_wide &&
2051 strcmp(counter->name, "duration_time")) {
2052 return;
2053 }
2054 }
2055
2056 if (evsel_list->core.nr_entries)
2057 target.system_wide = true;
2058 }
2059 }
2060
2061 int cmd_stat(int argc, const char **argv)
2062 {
2063 const char * const stat_usage[] = {
2064 "perf stat [<options>] [<command>]",
2065 NULL
2066 };
2067 int status = -EINVAL, run_idx;
2068 const char *mode;
2069 FILE *output = stderr;
2070 unsigned int interval, timeout;
2071 const char * const stat_subcommands[] = { "record", "report" };
2072
2073 setlocale(LC_ALL, "");
2074
2075 evsel_list = evlist__new();
2076 if (evsel_list == NULL)
2077 return -ENOMEM;
2078
2079 parse_events__shrink_config_terms();
2080
2081 /* String-parsing callback-based options would segfault when negated */
2082 set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG);
2083 set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG);
2084 set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG);
2085
2086 argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
2087 (const char **) stat_usage,
2088 PARSE_OPT_STOP_AT_NON_OPTION);
2089 perf_stat__collect_metric_expr(evsel_list);
2090 perf_stat__init_shadow_stats();
2091
2092 if (stat_config.csv_sep) {
2093 stat_config.csv_output = true;
2094 if (!strcmp(stat_config.csv_sep, "\\t"))
2095 stat_config.csv_sep = "\t";
2096 } else
2097 stat_config.csv_sep = DEFAULT_SEPARATOR;
2098
2099 if (argc && !strncmp(argv[0], "rec", 3)) {
2100 argc = __cmd_record(argc, argv);
2101 if (argc < 0)
2102 return -1;
2103 } else if (argc && !strncmp(argv[0], "rep", 3))
2104 return __cmd_report(argc, argv);
2105
2106 interval = stat_config.interval;
2107 timeout = stat_config.timeout;
2108
2109 /*
2110 * For record command the -o is already taken care of.
2111 */
2112 if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
2113 output = NULL;
2114
2115 if (output_name && output_fd) {
2116 fprintf(stderr, "cannot use both --output and --log-fd\n");
2117 parse_options_usage(stat_usage, stat_options, "o", 1);
2118 parse_options_usage(NULL, stat_options, "log-fd", 0);
2119 goto out;
2120 }
2121
2122 if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) {
2123 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
2124 goto out;
2125 }
2126
2127 if (stat_config.metric_only && stat_config.run_count > 1) {
2128 fprintf(stderr, "--metric-only is not supported with -r\n");
2129 goto out;
2130 }
2131
2132 if (stat_config.walltime_run_table && stat_config.run_count <= 1) {
2133 fprintf(stderr, "--table is only supported with -r\n");
2134 parse_options_usage(stat_usage, stat_options, "r", 1);
2135 parse_options_usage(NULL, stat_options, "table", 0);
2136 goto out;
2137 }
2138
2139 if (output_fd < 0) {
2140 fprintf(stderr, "argument to --log-fd must be a > 0\n");
2141 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
2142 goto out;
2143 }
2144
2145 if (!output && !stat_config.quiet) {
2146 struct timespec tm;
2147 mode = append_file ? "a" : "w";
2148
2149 output = fopen(output_name, mode);
2150 if (!output) {
2151 perror("failed to create output file");
2152 return -1;
2153 }
2154 clock_gettime(CLOCK_REALTIME, &tm);
2155 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
2156 } else if (output_fd > 0) {
2157 mode = append_file ? "a" : "w";
2158 output = fdopen(output_fd, mode);
2159 if (!output) {
2160 perror("Failed opening logfd");
2161 return -errno;
2162 }
2163 }
2164
2165 stat_config.output = output;
2166
2167 /*
2168 * let the spreadsheet do the pretty-printing
2169 */
2170 if (stat_config.csv_output) {
2171 /* User explicitly passed -B? */
2172 if (big_num_opt == 1) {
2173 fprintf(stderr, "-B option not supported with -x\n");
2174 parse_options_usage(stat_usage, stat_options, "B", 1);
2175 parse_options_usage(NULL, stat_options, "x", 1);
2176 goto out;
2177 } else /* Nope, so disable big number formatting */
2178 stat_config.big_num = false;
2179 } else if (big_num_opt == 0) /* User passed --no-big-num */
2180 stat_config.big_num = false;
2181
2182 setup_system_wide(argc);
2183
2184 /*
2185 * Display user/system times only for single
2186 * run and when there's specified tracee.
2187 */
2188 if ((stat_config.run_count == 1) && target__none(&target))
2189 stat_config.ru_display = true;
2190
2191 if (stat_config.run_count < 0) {
2192 pr_err("Run count must be a positive number\n");
2193 parse_options_usage(stat_usage, stat_options, "r", 1);
2194 goto out;
2195 } else if (stat_config.run_count == 0) {
2196 forever = true;
2197 stat_config.run_count = 1;
2198 }
2199
2200 if (stat_config.walltime_run_table) {
2201 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0]));
2202 if (!stat_config.walltime_run) {
2203 pr_err("failed to setup -r option");
2204 goto out;
2205 }
2206 }
2207
2208 if ((stat_config.aggr_mode == AGGR_THREAD) &&
2209 !target__has_task(&target)) {
2210 if (!target.system_wide || target.cpu_list) {
2211 fprintf(stderr, "The --per-thread option is only "
2212 "available when monitoring via -p -t -a "
2213 "options or only --per-thread.\n");
2214 parse_options_usage(NULL, stat_options, "p", 1);
2215 parse_options_usage(NULL, stat_options, "t", 1);
2216 goto out;
2217 }
2218 }
2219
2220 /*
2221 * no_aggr, cgroup are for system-wide only
2222 * --per-thread is aggregated per thread, we dont mix it with cpu mode
2223 */
2224 if (((stat_config.aggr_mode != AGGR_GLOBAL &&
2225 stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
2226 !target__has_cpu(&target)) {
2227 fprintf(stderr, "both cgroup and no-aggregation "
2228 "modes only available in system-wide mode\n");
2229
2230 parse_options_usage(stat_usage, stat_options, "G", 1);
2231 parse_options_usage(NULL, stat_options, "A", 1);
2232 parse_options_usage(NULL, stat_options, "a", 1);
2233 goto out;
2234 }
2235
2236 if (add_default_attributes())
2237 goto out;
2238
2239 if (stat_config.cgroup_list) {
2240 if (nr_cgroups > 0) {
2241 pr_err("--cgroup and --for-each-cgroup cannot be used together\n");
2242 parse_options_usage(stat_usage, stat_options, "G", 1);
2243 parse_options_usage(NULL, stat_options, "for-each-cgroup", 0);
2244 goto out;
2245 }
2246
2247 if (evlist__expand_cgroup(evsel_list, stat_config.cgroup_list,
2248 &stat_config.metric_events, true) < 0) {
2249 parse_options_usage(stat_usage, stat_options,
2250 "for-each-cgroup", 0);
2251 goto out;
2252 }
2253 }
2254
2255 target__validate(&target);
2256
2257 if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
2258 target.per_thread = true;
2259
2260 if (evlist__create_maps(evsel_list, &target) < 0) {
2261 if (target__has_task(&target)) {
2262 pr_err("Problems finding threads of monitor\n");
2263 parse_options_usage(stat_usage, stat_options, "p", 1);
2264 parse_options_usage(NULL, stat_options, "t", 1);
2265 } else if (target__has_cpu(&target)) {
2266 perror("failed to parse CPUs map");
2267 parse_options_usage(stat_usage, stat_options, "C", 1);
2268 parse_options_usage(NULL, stat_options, "a", 1);
2269 }
2270 goto out;
2271 }
2272
2273 evlist__check_cpu_maps(evsel_list);
2274
2275 /*
2276 * Initialize thread_map with comm names,
2277 * so we could print it out on output.
2278 */
2279 if (stat_config.aggr_mode == AGGR_THREAD) {
2280 thread_map__read_comms(evsel_list->core.threads);
2281 if (target.system_wide) {
2282 if (runtime_stat_new(&stat_config,
2283 perf_thread_map__nr(evsel_list->core.threads))) {
2284 goto out;
2285 }
2286 }
2287 }
2288
2289 if (stat_config.aggr_mode == AGGR_NODE)
2290 cpu__setup_cpunode_map();
2291
2292 if (stat_config.times && interval)
2293 interval_count = true;
2294 else if (stat_config.times && !interval) {
2295 pr_err("interval-count option should be used together with "
2296 "interval-print.\n");
2297 parse_options_usage(stat_usage, stat_options, "interval-count", 0);
2298 parse_options_usage(stat_usage, stat_options, "I", 1);
2299 goto out;
2300 }
2301
2302 if (timeout && timeout < 100) {
2303 if (timeout < 10) {
2304 pr_err("timeout must be >= 10ms.\n");
2305 parse_options_usage(stat_usage, stat_options, "timeout", 0);
2306 goto out;
2307 } else
2308 pr_warning("timeout < 100ms. "
2309 "The overhead percentage could be high in some cases. "
2310 "Please proceed with caution.\n");
2311 }
2312 if (timeout && interval) {
2313 pr_err("timeout option is not supported with interval-print.\n");
2314 parse_options_usage(stat_usage, stat_options, "timeout", 0);
2315 parse_options_usage(stat_usage, stat_options, "I", 1);
2316 goto out;
2317 }
2318
2319 if (evlist__alloc_stats(evsel_list, interval))
2320 goto out;
2321
2322 if (perf_stat_init_aggr_mode())
2323 goto out;
2324
2325 /*
2326 * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
2327 * while avoiding that older tools show confusing messages.
2328 *
2329 * However for pipe sessions we need to keep it zero,
2330 * because script's perf_evsel__check_attr is triggered
2331 * by attr->sample_type != 0, and we can't run it on
2332 * stat sessions.
2333 */
2334 stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe);
2335
2336 /*
2337 * We dont want to block the signals - that would cause
2338 * child tasks to inherit that and Ctrl-C would not work.
2339 * What we want is for Ctrl-C to work in the exec()-ed
2340 * task, but being ignored by perf stat itself:
2341 */
2342 atexit(sig_atexit);
2343 if (!forever)
2344 signal(SIGINT, skip_signal);
2345 signal(SIGCHLD, skip_signal);
2346 signal(SIGALRM, skip_signal);
2347 signal(SIGABRT, skip_signal);
2348
2349 if (evlist__initialize_ctlfd(evsel_list, stat_config.ctl_fd, stat_config.ctl_fd_ack))
2350 goto out;
2351
2352 status = 0;
2353 for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) {
2354 if (stat_config.run_count != 1 && verbose > 0)
2355 fprintf(output, "[ perf stat: executing run #%d ... ]\n",
2356 run_idx + 1);
2357
2358 if (run_idx != 0)
2359 evlist__reset_prev_raw_counts(evsel_list);
2360
2361 status = run_perf_stat(argc, argv, run_idx);
2362 if (forever && status != -1 && !interval) {
2363 print_counters(NULL, argc, argv);
2364 perf_stat__reset_stats();
2365 }
2366 }
2367
2368 if (!forever && status != -1 && (!interval || stat_config.summary))
2369 print_counters(NULL, argc, argv);
2370
2371 evlist__finalize_ctlfd(evsel_list);
2372
2373 if (STAT_RECORD) {
2374 /*
2375 * We synthesize the kernel mmap record just so that older tools
2376 * don't emit warnings about not being able to resolve symbols
2377 * due to /proc/sys/kernel/kptr_restrict settings and instear provide
2378 * a saner message about no samples being in the perf.data file.
2379 *
2380 * This also serves to suppress a warning about f_header.data.size == 0
2381 * in header.c at the moment 'perf stat record' gets introduced, which
2382 * is not really needed once we start adding the stat specific PERF_RECORD_
2383 * records, but the need to suppress the kptr_restrict messages in older
2384 * tools remain -acme
2385 */
2386 int fd = perf_data__fd(&perf_stat.data);
2387 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
2388 process_synthesized_event,
2389 &perf_stat.session->machines.host);
2390 if (err) {
2391 pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
2392 "older tools may produce warnings about this file\n.");
2393 }
2394
2395 if (!interval) {
2396 if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
2397 pr_err("failed to write stat round event\n");
2398 }
2399
2400 if (!perf_stat.data.is_pipe) {
2401 perf_stat.session->header.data_size += perf_stat.bytes_written;
2402 perf_session__write_header(perf_stat.session, evsel_list, fd, true);
2403 }
2404
2405 evlist__close(evsel_list);
2406 perf_session__delete(perf_stat.session);
2407 }
2408
2409 perf_stat__exit_aggr_mode();
2410 evlist__free_stats(evsel_list);
2411 out:
2412 zfree(&stat_config.walltime_run);
2413
2414 if (smi_cost && smi_reset)
2415 sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
2416
2417 evlist__delete(evsel_list);
2418
2419 metricgroup__rblist_exit(&stat_config.metric_events);
2420 runtime_stat_delete(&stat_config);
2421 evlist__close_control(stat_config.ctl_fd, stat_config.ctl_fd_ack, &stat_config.ctl_fd_close);
2422
2423 return status;
2424 }
Linux with added FPC-III support