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Merge tag 'block-5.9-2020-08-14' of git://git.kernel.dk/linux-block
[linux/fpc-iii.git] / tools / perf / builtin-stat.c
blob483a28ef4ec4feefacb087c761ba11373e0a055b
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/group.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 *smi_cost_attrs = {
132 "{"
133 "msr/aperf/,"
134 "msr/smi/,"
135 "cycles"
136 "}"
137 };
138
139 static struct evlist *evsel_list;
140
141 static struct target target = {
142 .uid = UINT_MAX,
143 };
144
145 #define METRIC_ONLY_LEN 20
146
147 static volatile pid_t child_pid = -1;
148 static int detailed_run = 0;
149 static bool transaction_run;
150 static bool topdown_run = false;
151 static bool smi_cost = false;
152 static bool smi_reset = false;
153 static int big_num_opt = -1;
154 static bool group = false;
155 static const char *pre_cmd = NULL;
156 static const char *post_cmd = NULL;
157 static bool sync_run = false;
158 static bool forever = false;
159 static bool force_metric_only = false;
160 static struct timespec ref_time;
161 static bool append_file;
162 static bool interval_count;
163 static const char *output_name;
164 static int output_fd;
165
166 struct perf_stat {
167 bool record;
168 struct perf_data data;
169 struct perf_session *session;
170 u64 bytes_written;
171 struct perf_tool tool;
172 bool maps_allocated;
173 struct perf_cpu_map *cpus;
174 struct perf_thread_map *threads;
175 enum aggr_mode aggr_mode;
176 };
177
178 static struct perf_stat perf_stat;
179 #define STAT_RECORD perf_stat.record
180
181 static volatile int done = 0;
182
183 static struct perf_stat_config stat_config = {
184 .aggr_mode = AGGR_GLOBAL,
185 .scale = true,
186 .unit_width = 4, /* strlen("unit") */
187 .run_count = 1,
188 .metric_only_len = METRIC_ONLY_LEN,
189 .walltime_nsecs_stats = &walltime_nsecs_stats,
190 .big_num = true,
191 .ctl_fd = -1,
192 .ctl_fd_ack = -1
193 };
194
195 static bool cpus_map_matched(struct evsel *a, struct evsel *b)
196 {
197 if (!a->core.cpus && !b->core.cpus)
198 return true;
199
200 if (!a->core.cpus || !b->core.cpus)
201 return false;
202
203 if (a->core.cpus->nr != b->core.cpus->nr)
204 return false;
205
206 for (int i = 0; i < a->core.cpus->nr; i++) {
207 if (a->core.cpus->map[i] != b->core.cpus->map[i])
208 return false;
209 }
210
211 return true;
212 }
213
214 static void evlist__check_cpu_maps(struct evlist *evlist)
215 {
216 struct evsel *evsel, *pos, *leader;
217 char buf[1024];
218
219 evlist__for_each_entry(evlist, evsel) {
220 leader = evsel->leader;
221
222 /* Check that leader matches cpus with each member. */
223 if (leader == evsel)
224 continue;
225 if (cpus_map_matched(leader, evsel))
226 continue;
227
228 /* If there's mismatch disable the group and warn user. */
229 WARN_ONCE(1, "WARNING: grouped events cpus do not match, disabling group:\n");
230 evsel__group_desc(leader, buf, sizeof(buf));
231 pr_warning(" %s\n", buf);
232
233 if (verbose) {
234 cpu_map__snprint(leader->core.cpus, buf, sizeof(buf));
235 pr_warning(" %s: %s\n", leader->name, buf);
236 cpu_map__snprint(evsel->core.cpus, buf, sizeof(buf));
237 pr_warning(" %s: %s\n", evsel->name, buf);
238 }
239
240 for_each_group_evsel(pos, leader) {
241 pos->leader = pos;
242 pos->core.nr_members = 0;
243 }
244 evsel->leader->core.nr_members = 0;
245 }
246 }
247
248 static inline void diff_timespec(struct timespec *r, struct timespec *a,
249 struct timespec *b)
250 {
251 r->tv_sec = a->tv_sec - b->tv_sec;
252 if (a->tv_nsec < b->tv_nsec) {
253 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
254 r->tv_sec--;
255 } else {
256 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
257 }
258 }
259
260 static void perf_stat__reset_stats(void)
261 {
262 int i;
263
264 perf_evlist__reset_stats(evsel_list);
265 perf_stat__reset_shadow_stats();
266
267 for (i = 0; i < stat_config.stats_num; i++)
268 perf_stat__reset_shadow_per_stat(&stat_config.stats[i]);
269 }
270
271 static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
272 union perf_event *event,
273 struct perf_sample *sample __maybe_unused,
274 struct machine *machine __maybe_unused)
275 {
276 if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) {
277 pr_err("failed to write perf data, error: %m\n");
278 return -1;
279 }
280
281 perf_stat.bytes_written += event->header.size;
282 return 0;
283 }
284
285 static int write_stat_round_event(u64 tm, u64 type)
286 {
287 return perf_event__synthesize_stat_round(NULL, tm, type,
288 process_synthesized_event,
289 NULL);
290 }
291
292 #define WRITE_STAT_ROUND_EVENT(time, interval) \
293 write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
294
295 #define SID(e, x, y) xyarray__entry(e->core.sample_id, x, y)
296
297 static int evsel__write_stat_event(struct evsel *counter, u32 cpu, u32 thread,
298 struct perf_counts_values *count)
299 {
300 struct perf_sample_id *sid = SID(counter, cpu, thread);
301
302 return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
303 process_synthesized_event, NULL);
304 }
305
306 static int read_single_counter(struct evsel *counter, int cpu,
307 int thread, struct timespec *rs)
308 {
309 if (counter->tool_event == PERF_TOOL_DURATION_TIME) {
310 u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL;
311 struct perf_counts_values *count =
312 perf_counts(counter->counts, cpu, thread);
313 count->ena = count->run = val;
314 count->val = val;
315 return 0;
316 }
317 return evsel__read_counter(counter, cpu, thread);
318 }
319
320 /*
321 * Read out the results of a single counter:
322 * do not aggregate counts across CPUs in system-wide mode
323 */
324 static int read_counter_cpu(struct evsel *counter, struct timespec *rs, int cpu)
325 {
326 int nthreads = perf_thread_map__nr(evsel_list->core.threads);
327 int thread;
328
329 if (!counter->supported)
330 return -ENOENT;
331
332 if (counter->core.system_wide)
333 nthreads = 1;
334
335 for (thread = 0; thread < nthreads; thread++) {
336 struct perf_counts_values *count;
337
338 count = perf_counts(counter->counts, cpu, thread);
339
340 /*
341 * The leader's group read loads data into its group members
342 * (via evsel__read_counter()) and sets their count->loaded.
343 */
344 if (!perf_counts__is_loaded(counter->counts, cpu, thread) &&
345 read_single_counter(counter, cpu, thread, rs)) {
346 counter->counts->scaled = -1;
347 perf_counts(counter->counts, cpu, thread)->ena = 0;
348 perf_counts(counter->counts, cpu, thread)->run = 0;
349 return -1;
350 }
351
352 perf_counts__set_loaded(counter->counts, cpu, thread, false);
353
354 if (STAT_RECORD) {
355 if (evsel__write_stat_event(counter, cpu, thread, count)) {
356 pr_err("failed to write stat event\n");
357 return -1;
358 }
359 }
360
361 if (verbose > 1) {
362 fprintf(stat_config.output,
363 "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
364 evsel__name(counter),
365 cpu,
366 count->val, count->ena, count->run);
367 }
368 }
369
370 return 0;
371 }
372
373 static int read_affinity_counters(struct timespec *rs)
374 {
375 struct evsel *counter;
376 struct affinity affinity;
377 int i, ncpus, cpu;
378
379 if (affinity__setup(&affinity) < 0)
380 return -1;
381
382 ncpus = perf_cpu_map__nr(evsel_list->core.all_cpus);
383 if (!target__has_cpu(&target) || target__has_per_thread(&target))
384 ncpus = 1;
385 evlist__for_each_cpu(evsel_list, i, cpu) {
386 if (i >= ncpus)
387 break;
388 affinity__set(&affinity, cpu);
389
390 evlist__for_each_entry(evsel_list, counter) {
391 if (evsel__cpu_iter_skip(counter, cpu))
392 continue;
393 if (!counter->err) {
394 counter->err = read_counter_cpu(counter, rs,
395 counter->cpu_iter - 1);
396 }
397 }
398 }
399 affinity__cleanup(&affinity);
400 return 0;
401 }
402
403 static void read_counters(struct timespec *rs)
404 {
405 struct evsel *counter;
406
407 if (!stat_config.summary && (read_affinity_counters(rs) < 0))
408 return;
409
410 evlist__for_each_entry(evsel_list, counter) {
411 if (counter->err)
412 pr_debug("failed to read counter %s\n", counter->name);
413 if (counter->err == 0 && perf_stat_process_counter(&stat_config, counter))
414 pr_warning("failed to process counter %s\n", counter->name);
415 counter->err = 0;
416 }
417 }
418
419 static int runtime_stat_new(struct perf_stat_config *config, int nthreads)
420 {
421 int i;
422
423 config->stats = calloc(nthreads, sizeof(struct runtime_stat));
424 if (!config->stats)
425 return -1;
426
427 config->stats_num = nthreads;
428
429 for (i = 0; i < nthreads; i++)
430 runtime_stat__init(&config->stats[i]);
431
432 return 0;
433 }
434
435 static void runtime_stat_delete(struct perf_stat_config *config)
436 {
437 int i;
438
439 if (!config->stats)
440 return;
441
442 for (i = 0; i < config->stats_num; i++)
443 runtime_stat__exit(&config->stats[i]);
444
445 zfree(&config->stats);
446 }
447
448 static void runtime_stat_reset(struct perf_stat_config *config)
449 {
450 int i;
451
452 if (!config->stats)
453 return;
454
455 for (i = 0; i < config->stats_num; i++)
456 perf_stat__reset_shadow_per_stat(&config->stats[i]);
457 }
458
459 static void process_interval(void)
460 {
461 struct timespec ts, rs;
462
463 clock_gettime(CLOCK_MONOTONIC, &ts);
464 diff_timespec(&rs, &ts, &ref_time);
465
466 perf_stat__reset_shadow_per_stat(&rt_stat);
467 runtime_stat_reset(&stat_config);
468 read_counters(&rs);
469
470 if (STAT_RECORD) {
471 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
472 pr_err("failed to write stat round event\n");
473 }
474
475 init_stats(&walltime_nsecs_stats);
476 update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000ULL);
477 print_counters(&rs, 0, NULL);
478 }
479
480 static bool handle_interval(unsigned int interval, int *times)
481 {
482 if (interval) {
483 process_interval();
484 if (interval_count && !(--(*times)))
485 return true;
486 }
487 return false;
488 }
489
490 static void enable_counters(void)
491 {
492 if (stat_config.initial_delay < 0) {
493 pr_info(EVLIST_DISABLED_MSG);
494 return;
495 }
496
497 if (stat_config.initial_delay > 0) {
498 pr_info(EVLIST_DISABLED_MSG);
499 usleep(stat_config.initial_delay * USEC_PER_MSEC);
500 }
501
502 /*
503 * We need to enable counters only if:
504 * - we don't have tracee (attaching to task or cpu)
505 * - we have initial delay configured
506 */
507 if (!target__none(&target) || stat_config.initial_delay) {
508 evlist__enable(evsel_list);
509 if (stat_config.initial_delay > 0)
510 pr_info(EVLIST_ENABLED_MSG);
511 }
512 }
513
514 static void disable_counters(void)
515 {
516 /*
517 * If we don't have tracee (attaching to task or cpu), counters may
518 * still be running. To get accurate group ratios, we must stop groups
519 * from counting before reading their constituent counters.
520 */
521 if (!target__none(&target))
522 evlist__disable(evsel_list);
523 }
524
525 static volatile int workload_exec_errno;
526
527 /*
528 * perf_evlist__prepare_workload will send a SIGUSR1
529 * if the fork fails, since we asked by setting its
530 * want_signal to true.
531 */
532 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
533 void *ucontext __maybe_unused)
534 {
535 workload_exec_errno = info->si_value.sival_int;
536 }
537
538 static bool evsel__should_store_id(struct evsel *counter)
539 {
540 return STAT_RECORD || counter->core.attr.read_format & PERF_FORMAT_ID;
541 }
542
543 static bool is_target_alive(struct target *_target,
544 struct perf_thread_map *threads)
545 {
546 struct stat st;
547 int i;
548
549 if (!target__has_task(_target))
550 return true;
551
552 for (i = 0; i < threads->nr; i++) {
553 char path[PATH_MAX];
554
555 scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(),
556 threads->map[i].pid);
557
558 if (!stat(path, &st))
559 return true;
560 }
561
562 return false;
563 }
564
565 static void process_evlist(struct evlist *evlist, unsigned int interval)
566 {
567 enum evlist_ctl_cmd cmd = EVLIST_CTL_CMD_UNSUPPORTED;
568
569 if (evlist__ctlfd_process(evlist, &cmd) > 0) {
570 switch (cmd) {
571 case EVLIST_CTL_CMD_ENABLE:
572 pr_info(EVLIST_ENABLED_MSG);
573 if (interval)
574 process_interval();
575 break;
576 case EVLIST_CTL_CMD_DISABLE:
577 if (interval)
578 process_interval();
579 pr_info(EVLIST_DISABLED_MSG);
580 break;
581 case EVLIST_CTL_CMD_ACK:
582 case EVLIST_CTL_CMD_UNSUPPORTED:
583 default:
584 break;
585 }
586 }
587 }
588
589 static void compute_tts(struct timespec *time_start, struct timespec *time_stop,
590 int *time_to_sleep)
591 {
592 int tts = *time_to_sleep;
593 struct timespec time_diff;
594
595 diff_timespec(&time_diff, time_stop, time_start);
596
597 tts -= time_diff.tv_sec * MSEC_PER_SEC +
598 time_diff.tv_nsec / NSEC_PER_MSEC;
599
600 if (tts < 0)
601 tts = 0;
602
603 *time_to_sleep = tts;
604 }
605
606 static int dispatch_events(bool forks, int timeout, int interval, int *times)
607 {
608 int child_exited = 0, status = 0;
609 int time_to_sleep, sleep_time;
610 struct timespec time_start, time_stop;
611
612 if (interval)
613 sleep_time = interval;
614 else if (timeout)
615 sleep_time = timeout;
616 else
617 sleep_time = 1000;
618
619 time_to_sleep = sleep_time;
620
621 while (!done) {
622 if (forks)
623 child_exited = waitpid(child_pid, &status, WNOHANG);
624 else
625 child_exited = !is_target_alive(&target, evsel_list->core.threads) ? 1 : 0;
626
627 if (child_exited)
628 break;
629
630 clock_gettime(CLOCK_MONOTONIC, &time_start);
631 if (!(evlist__poll(evsel_list, time_to_sleep) > 0)) { /* poll timeout or EINTR */
632 if (timeout || handle_interval(interval, times))
633 break;
634 time_to_sleep = sleep_time;
635 } else { /* fd revent */
636 process_evlist(evsel_list, interval);
637 clock_gettime(CLOCK_MONOTONIC, &time_stop);
638 compute_tts(&time_start, &time_stop, &time_to_sleep);
639 }
640 }
641
642 return status;
643 }
644
645 enum counter_recovery {
646 COUNTER_SKIP,
647 COUNTER_RETRY,
648 COUNTER_FATAL,
649 };
650
651 static enum counter_recovery stat_handle_error(struct evsel *counter)
652 {
653 char msg[BUFSIZ];
654 /*
655 * PPC returns ENXIO for HW counters until 2.6.37
656 * (behavior changed with commit b0a873e).
657 */
658 if (errno == EINVAL || errno == ENOSYS ||
659 errno == ENOENT || errno == EOPNOTSUPP ||
660 errno == ENXIO) {
661 if (verbose > 0)
662 ui__warning("%s event is not supported by the kernel.\n",
663 evsel__name(counter));
664 counter->supported = false;
665 /*
666 * errored is a sticky flag that means one of the counter's
667 * cpu event had a problem and needs to be reexamined.
668 */
669 counter->errored = true;
670
671 if ((counter->leader != counter) ||
672 !(counter->leader->core.nr_members > 1))
673 return COUNTER_SKIP;
674 } else if (evsel__fallback(counter, errno, msg, sizeof(msg))) {
675 if (verbose > 0)
676 ui__warning("%s\n", msg);
677 return COUNTER_RETRY;
678 } else if (target__has_per_thread(&target) &&
679 evsel_list->core.threads &&
680 evsel_list->core.threads->err_thread != -1) {
681 /*
682 * For global --per-thread case, skip current
683 * error thread.
684 */
685 if (!thread_map__remove(evsel_list->core.threads,
686 evsel_list->core.threads->err_thread)) {
687 evsel_list->core.threads->err_thread = -1;
688 return COUNTER_RETRY;
689 }
690 }
691
692 evsel__open_strerror(counter, &target, errno, msg, sizeof(msg));
693 ui__error("%s\n", msg);
694
695 if (child_pid != -1)
696 kill(child_pid, SIGTERM);
697 return COUNTER_FATAL;
698 }
699
700 static int __run_perf_stat(int argc, const char **argv, int run_idx)
701 {
702 int interval = stat_config.interval;
703 int times = stat_config.times;
704 int timeout = stat_config.timeout;
705 char msg[BUFSIZ];
706 unsigned long long t0, t1;
707 struct evsel *counter;
708 size_t l;
709 int status = 0;
710 const bool forks = (argc > 0);
711 bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false;
712 struct affinity affinity;
713 int i, cpu;
714 bool second_pass = false;
715
716 if (forks) {
717 if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe,
718 workload_exec_failed_signal) < 0) {
719 perror("failed to prepare workload");
720 return -1;
721 }
722 child_pid = evsel_list->workload.pid;
723 }
724
725 if (group)
726 perf_evlist__set_leader(evsel_list);
727
728 if (affinity__setup(&affinity) < 0)
729 return -1;
730
731 evlist__for_each_cpu (evsel_list, i, cpu) {
732 affinity__set(&affinity, cpu);
733
734 evlist__for_each_entry(evsel_list, counter) {
735 if (evsel__cpu_iter_skip(counter, cpu))
736 continue;
737 if (counter->reset_group || counter->errored)
738 continue;
739 try_again:
740 if (create_perf_stat_counter(counter, &stat_config, &target,
741 counter->cpu_iter - 1) < 0) {
742
743 /*
744 * Weak group failed. We cannot just undo this here
745 * because earlier CPUs might be in group mode, and the kernel
746 * doesn't support mixing group and non group reads. Defer
747 * it to later.
748 * Don't close here because we're in the wrong affinity.
749 */
750 if ((errno == EINVAL || errno == EBADF) &&
751 counter->leader != counter &&
752 counter->weak_group) {
753 perf_evlist__reset_weak_group(evsel_list, counter, false);
754 assert(counter->reset_group);
755 second_pass = true;
756 continue;
757 }
758
759 switch (stat_handle_error(counter)) {
760 case COUNTER_FATAL:
761 return -1;
762 case COUNTER_RETRY:
763 goto try_again;
764 case COUNTER_SKIP:
765 continue;
766 default:
767 break;
768 }
769
770 }
771 counter->supported = true;
772 }
773 }
774
775 if (second_pass) {
776 /*
777 * Now redo all the weak group after closing them,
778 * and also close errored counters.
779 */
780
781 evlist__for_each_cpu(evsel_list, i, cpu) {
782 affinity__set(&affinity, cpu);
783 /* First close errored or weak retry */
784 evlist__for_each_entry(evsel_list, counter) {
785 if (!counter->reset_group && !counter->errored)
786 continue;
787 if (evsel__cpu_iter_skip_no_inc(counter, cpu))
788 continue;
789 perf_evsel__close_cpu(&counter->core, counter->cpu_iter);
790 }
791 /* Now reopen weak */
792 evlist__for_each_entry(evsel_list, counter) {
793 if (!counter->reset_group && !counter->errored)
794 continue;
795 if (evsel__cpu_iter_skip(counter, cpu))
796 continue;
797 if (!counter->reset_group)
798 continue;
799 try_again_reset:
800 pr_debug2("reopening weak %s\n", evsel__name(counter));
801 if (create_perf_stat_counter(counter, &stat_config, &target,
802 counter->cpu_iter - 1) < 0) {
803
804 switch (stat_handle_error(counter)) {
805 case COUNTER_FATAL:
806 return -1;
807 case COUNTER_RETRY:
808 goto try_again_reset;
809 case COUNTER_SKIP:
810 continue;
811 default:
812 break;
813 }
814 }
815 counter->supported = true;
816 }
817 }
818 }
819 affinity__cleanup(&affinity);
820
821 evlist__for_each_entry(evsel_list, counter) {
822 if (!counter->supported) {
823 perf_evsel__free_fd(&counter->core);
824 continue;
825 }
826
827 l = strlen(counter->unit);
828 if (l > stat_config.unit_width)
829 stat_config.unit_width = l;
830
831 if (evsel__should_store_id(counter) &&
832 evsel__store_ids(counter, evsel_list))
833 return -1;
834 }
835
836 if (perf_evlist__apply_filters(evsel_list, &counter)) {
837 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
838 counter->filter, evsel__name(counter), errno,
839 str_error_r(errno, msg, sizeof(msg)));
840 return -1;
841 }
842
843 if (STAT_RECORD) {
844 int err, fd = perf_data__fd(&perf_stat.data);
845
846 if (is_pipe) {
847 err = perf_header__write_pipe(perf_data__fd(&perf_stat.data));
848 } else {
849 err = perf_session__write_header(perf_stat.session, evsel_list,
850 fd, false);
851 }
852
853 if (err < 0)
854 return err;
855
856 err = perf_event__synthesize_stat_events(&stat_config, NULL, evsel_list,
857 process_synthesized_event, is_pipe);
858 if (err < 0)
859 return err;
860 }
861
862 /*
863 * Enable counters and exec the command:
864 */
865 t0 = rdclock();
866 clock_gettime(CLOCK_MONOTONIC, &ref_time);
867
868 if (forks) {
869 perf_evlist__start_workload(evsel_list);
870 enable_counters();
871
872 if (interval || timeout || evlist__ctlfd_initialized(evsel_list))
873 status = dispatch_events(forks, timeout, interval, &times);
874 if (child_pid != -1) {
875 if (timeout)
876 kill(child_pid, SIGTERM);
877 wait4(child_pid, &status, 0, &stat_config.ru_data);
878 }
879
880 if (workload_exec_errno) {
881 const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
882 pr_err("Workload failed: %s\n", emsg);
883 return -1;
884 }
885
886 if (WIFSIGNALED(status))
887 psignal(WTERMSIG(status), argv[0]);
888 } else {
889 enable_counters();
890 status = dispatch_events(forks, timeout, interval, &times);
891 }
892
893 disable_counters();
894
895 t1 = rdclock();
896
897 if (stat_config.walltime_run_table)
898 stat_config.walltime_run[run_idx] = t1 - t0;
899
900 if (interval) {
901 stat_config.interval = 0;
902 stat_config.summary = true;
903 init_stats(&walltime_nsecs_stats);
904 update_stats(&walltime_nsecs_stats, t1 - t0);
905
906 if (stat_config.aggr_mode == AGGR_GLOBAL)
907 perf_evlist__save_aggr_prev_raw_counts(evsel_list);
908
909 perf_evlist__copy_prev_raw_counts(evsel_list);
910 perf_evlist__reset_prev_raw_counts(evsel_list);
911 runtime_stat_reset(&stat_config);
912 perf_stat__reset_shadow_per_stat(&rt_stat);
913 } else
914 update_stats(&walltime_nsecs_stats, t1 - t0);
915
916 /*
917 * Closing a group leader splits the group, and as we only disable
918 * group leaders, results in remaining events becoming enabled. To
919 * avoid arbitrary skew, we must read all counters before closing any
920 * group leaders.
921 */
922 read_counters(&(struct timespec) { .tv_nsec = t1-t0 });
923
924 /*
925 * We need to keep evsel_list alive, because it's processed
926 * later the evsel_list will be closed after.
927 */
928 if (!STAT_RECORD)
929 evlist__close(evsel_list);
930
931 return WEXITSTATUS(status);
932 }
933
934 static int run_perf_stat(int argc, const char **argv, int run_idx)
935 {
936 int ret;
937
938 if (pre_cmd) {
939 ret = system(pre_cmd);
940 if (ret)
941 return ret;
942 }
943
944 if (sync_run)
945 sync();
946
947 ret = __run_perf_stat(argc, argv, run_idx);
948 if (ret)
949 return ret;
950
951 if (post_cmd) {
952 ret = system(post_cmd);
953 if (ret)
954 return ret;
955 }
956
957 return ret;
958 }
959
960 static void print_counters(struct timespec *ts, int argc, const char **argv)
961 {
962 /* Do not print anything if we record to the pipe. */
963 if (STAT_RECORD && perf_stat.data.is_pipe)
964 return;
965
966 perf_evlist__print_counters(evsel_list, &stat_config, &target,
967 ts, argc, argv);
968 }
969
970 static volatile int signr = -1;
971
972 static void skip_signal(int signo)
973 {
974 if ((child_pid == -1) || stat_config.interval)
975 done = 1;
976
977 signr = signo;
978 /*
979 * render child_pid harmless
980 * won't send SIGTERM to a random
981 * process in case of race condition
982 * and fast PID recycling
983 */
984 child_pid = -1;
985 }
986
987 static void sig_atexit(void)
988 {
989 sigset_t set, oset;
990
991 /*
992 * avoid race condition with SIGCHLD handler
993 * in skip_signal() which is modifying child_pid
994 * goal is to avoid send SIGTERM to a random
995 * process
996 */
997 sigemptyset(&set);
998 sigaddset(&set, SIGCHLD);
999 sigprocmask(SIG_BLOCK, &set, &oset);
1000
1001 if (child_pid != -1)
1002 kill(child_pid, SIGTERM);
1003
1004 sigprocmask(SIG_SETMASK, &oset, NULL);
1005
1006 if (signr == -1)
1007 return;
1008
1009 signal(signr, SIG_DFL);
1010 kill(getpid(), signr);
1011 }
1012
1013 void perf_stat__set_big_num(int set)
1014 {
1015 stat_config.big_num = (set != 0);
1016 }
1017
1018 static int stat__set_big_num(const struct option *opt __maybe_unused,
1019 const char *s __maybe_unused, int unset)
1020 {
1021 big_num_opt = unset ? 0 : 1;
1022 perf_stat__set_big_num(!unset);
1023 return 0;
1024 }
1025
1026 static int enable_metric_only(const struct option *opt __maybe_unused,
1027 const char *s __maybe_unused, int unset)
1028 {
1029 force_metric_only = true;
1030 stat_config.metric_only = !unset;
1031 return 0;
1032 }
1033
1034 static int parse_metric_groups(const struct option *opt,
1035 const char *str,
1036 int unset __maybe_unused)
1037 {
1038 return metricgroup__parse_groups(opt, str,
1039 stat_config.metric_no_group,
1040 stat_config.metric_no_merge,
1041 &stat_config.metric_events);
1042 }
1043
1044 static int parse_control_option(const struct option *opt,
1045 const char *str,
1046 int unset __maybe_unused)
1047 {
1048 char *comma = NULL, *endptr = NULL;
1049 struct perf_stat_config *config = (struct perf_stat_config *)opt->value;
1050
1051 if (strncmp(str, "fd:", 3))
1052 return -EINVAL;
1053
1054 config->ctl_fd = strtoul(&str[3], &endptr, 0);
1055 if (endptr == &str[3])
1056 return -EINVAL;
1057
1058 comma = strchr(str, ',');
1059 if (comma) {
1060 if (endptr != comma)
1061 return -EINVAL;
1062
1063 config->ctl_fd_ack = strtoul(comma + 1, &endptr, 0);
1064 if (endptr == comma + 1 || *endptr != '\0')
1065 return -EINVAL;
1066 }
1067
1068 return 0;
1069 }
1070
1071 static struct option stat_options[] = {
1072 OPT_BOOLEAN('T', "transaction", &transaction_run,
1073 "hardware transaction statistics"),
1074 OPT_CALLBACK('e', "event", &evsel_list, "event",
1075 "event selector. use 'perf list' to list available events",
1076 parse_events_option),
1077 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1078 "event filter", parse_filter),
1079 OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit,
1080 "child tasks do not inherit counters"),
1081 OPT_STRING('p', "pid", &target.pid, "pid",
1082 "stat events on existing process id"),
1083 OPT_STRING('t', "tid", &target.tid, "tid",
1084 "stat events on existing thread id"),
1085 OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1086 "system-wide collection from all CPUs"),
1087 OPT_BOOLEAN('g', "group", &group,
1088 "put the counters into a counter group"),
1089 OPT_BOOLEAN(0, "scale", &stat_config.scale,
1090 "Use --no-scale to disable counter scaling for multiplexing"),
1091 OPT_INCR('v', "verbose", &verbose,
1092 "be more verbose (show counter open errors, etc)"),
1093 OPT_INTEGER('r', "repeat", &stat_config.run_count,
1094 "repeat command and print average + stddev (max: 100, forever: 0)"),
1095 OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table,
1096 "display details about each run (only with -r option)"),
1097 OPT_BOOLEAN('n', "null", &stat_config.null_run,
1098 "null run - dont start any counters"),
1099 OPT_INCR('d', "detailed", &detailed_run,
1100 "detailed run - start a lot of events"),
1101 OPT_BOOLEAN('S', "sync", &sync_run,
1102 "call sync() before starting a run"),
1103 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1104 "print large numbers with thousands\' separators",
1105 stat__set_big_num),
1106 OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1107 "list of cpus to monitor in system-wide"),
1108 OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
1109 "disable CPU count aggregation", AGGR_NONE),
1110 OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"),
1111 OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator",
1112 "print counts with custom separator"),
1113 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1114 "monitor event in cgroup name only", parse_cgroups),
1115 OPT_STRING('o', "output", &output_name, "file", "output file name"),
1116 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1117 OPT_INTEGER(0, "log-fd", &output_fd,
1118 "log output to fd, instead of stderr"),
1119 OPT_STRING(0, "pre", &pre_cmd, "command",
1120 "command to run prior to the measured command"),
1121 OPT_STRING(0, "post", &post_cmd, "command",
1122 "command to run after to the measured command"),
1123 OPT_UINTEGER('I', "interval-print", &stat_config.interval,
1124 "print counts at regular interval in ms "
1125 "(overhead is possible for values <= 100ms)"),
1126 OPT_INTEGER(0, "interval-count", &stat_config.times,
1127 "print counts for fixed number of times"),
1128 OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear,
1129 "clear screen in between new interval"),
1130 OPT_UINTEGER(0, "timeout", &stat_config.timeout,
1131 "stop workload and print counts after a timeout period in ms (>= 10ms)"),
1132 OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
1133 "aggregate counts per processor socket", AGGR_SOCKET),
1134 OPT_SET_UINT(0, "per-die", &stat_config.aggr_mode,
1135 "aggregate counts per processor die", AGGR_DIE),
1136 OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
1137 "aggregate counts per physical processor core", AGGR_CORE),
1138 OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
1139 "aggregate counts per thread", AGGR_THREAD),
1140 OPT_SET_UINT(0, "per-node", &stat_config.aggr_mode,
1141 "aggregate counts per numa node", AGGR_NODE),
1142 OPT_INTEGER('D', "delay", &stat_config.initial_delay,
1143 "ms to wait before starting measurement after program start (-1: start with events disabled)"),
1144 OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL,
1145 "Only print computed metrics. No raw values", enable_metric_only),
1146 OPT_BOOLEAN(0, "metric-no-group", &stat_config.metric_no_group,
1147 "don't group metric events, impacts multiplexing"),
1148 OPT_BOOLEAN(0, "metric-no-merge", &stat_config.metric_no_merge,
1149 "don't try to share events between metrics in a group"),
1150 OPT_BOOLEAN(0, "topdown", &topdown_run,
1151 "measure topdown level 1 statistics"),
1152 OPT_BOOLEAN(0, "smi-cost", &smi_cost,
1153 "measure SMI cost"),
1154 OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
1155 "monitor specified metrics or metric groups (separated by ,)",
1156 parse_metric_groups),
1157 OPT_BOOLEAN_FLAG(0, "all-kernel", &stat_config.all_kernel,
1158 "Configure all used events to run in kernel space.",
1159 PARSE_OPT_EXCLUSIVE),
1160 OPT_BOOLEAN_FLAG(0, "all-user", &stat_config.all_user,
1161 "Configure all used events to run in user space.",
1162 PARSE_OPT_EXCLUSIVE),
1163 OPT_BOOLEAN(0, "percore-show-thread", &stat_config.percore_show_thread,
1164 "Use with 'percore' event qualifier to show the event "
1165 "counts of one hardware thread by sum up total hardware "
1166 "threads of same physical core"),
1167 #ifdef HAVE_LIBPFM
1168 OPT_CALLBACK(0, "pfm-events", &evsel_list, "event",
1169 "libpfm4 event selector. use 'perf list' to list available events",
1170 parse_libpfm_events_option),
1171 #endif
1172 OPT_CALLBACK(0, "control", &stat_config, "fd:ctl-fd[,ack-fd]",
1173 "Listen on ctl-fd descriptor for command to control measurement ('enable': enable events, 'disable': disable events).\n"
1174 "\t\t\t Optionally send control command completion ('ack\\n') to ack-fd descriptor.",
1175 parse_control_option),
1176 OPT_END()
1177 };
1178
1179 static int perf_stat__get_socket(struct perf_stat_config *config __maybe_unused,
1180 struct perf_cpu_map *map, int cpu)
1181 {
1182 return cpu_map__get_socket(map, cpu, NULL);
1183 }
1184
1185 static int perf_stat__get_die(struct perf_stat_config *config __maybe_unused,
1186 struct perf_cpu_map *map, int cpu)
1187 {
1188 return cpu_map__get_die(map, cpu, NULL);
1189 }
1190
1191 static int perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
1192 struct perf_cpu_map *map, int cpu)
1193 {
1194 return cpu_map__get_core(map, cpu, NULL);
1195 }
1196
1197 static int perf_stat__get_node(struct perf_stat_config *config __maybe_unused,
1198 struct perf_cpu_map *map, int cpu)
1199 {
1200 return cpu_map__get_node(map, cpu, NULL);
1201 }
1202
1203 static int perf_stat__get_aggr(struct perf_stat_config *config,
1204 aggr_get_id_t get_id, struct perf_cpu_map *map, int idx)
1205 {
1206 int cpu;
1207
1208 if (idx >= map->nr)
1209 return -1;
1210
1211 cpu = map->map[idx];
1212
1213 if (config->cpus_aggr_map->map[cpu] == -1)
1214 config->cpus_aggr_map->map[cpu] = get_id(config, map, idx);
1215
1216 return config->cpus_aggr_map->map[cpu];
1217 }
1218
1219 static int perf_stat__get_socket_cached(struct perf_stat_config *config,
1220 struct perf_cpu_map *map, int idx)
1221 {
1222 return perf_stat__get_aggr(config, perf_stat__get_socket, map, idx);
1223 }
1224
1225 static int perf_stat__get_die_cached(struct perf_stat_config *config,
1226 struct perf_cpu_map *map, int idx)
1227 {
1228 return perf_stat__get_aggr(config, perf_stat__get_die, map, idx);
1229 }
1230
1231 static int perf_stat__get_core_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_core, map, idx);
1235 }
1236
1237 static int perf_stat__get_node_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_node, map, idx);
1241 }
1242
1243 static bool term_percore_set(void)
1244 {
1245 struct evsel *counter;
1246
1247 evlist__for_each_entry(evsel_list, counter) {
1248 if (counter->percore)
1249 return true;
1250 }
1251
1252 return false;
1253 }
1254
1255 static int perf_stat_init_aggr_mode(void)
1256 {
1257 int nr;
1258
1259 switch (stat_config.aggr_mode) {
1260 case AGGR_SOCKET:
1261 if (cpu_map__build_socket_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1262 perror("cannot build socket map");
1263 return -1;
1264 }
1265 stat_config.aggr_get_id = perf_stat__get_socket_cached;
1266 break;
1267 case AGGR_DIE:
1268 if (cpu_map__build_die_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1269 perror("cannot build die map");
1270 return -1;
1271 }
1272 stat_config.aggr_get_id = perf_stat__get_die_cached;
1273 break;
1274 case AGGR_CORE:
1275 if (cpu_map__build_core_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1276 perror("cannot build core map");
1277 return -1;
1278 }
1279 stat_config.aggr_get_id = perf_stat__get_core_cached;
1280 break;
1281 case AGGR_NODE:
1282 if (cpu_map__build_node_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1283 perror("cannot build core map");
1284 return -1;
1285 }
1286 stat_config.aggr_get_id = perf_stat__get_node_cached;
1287 break;
1288 case AGGR_NONE:
1289 if (term_percore_set()) {
1290 if (cpu_map__build_core_map(evsel_list->core.cpus,
1291 &stat_config.aggr_map)) {
1292 perror("cannot build core map");
1293 return -1;
1294 }
1295 stat_config.aggr_get_id = perf_stat__get_core_cached;
1296 }
1297 break;
1298 case AGGR_GLOBAL:
1299 case AGGR_THREAD:
1300 case AGGR_UNSET:
1301 default:
1302 break;
1303 }
1304
1305 /*
1306 * The evsel_list->cpus is the base we operate on,
1307 * taking the highest cpu number to be the size of
1308 * the aggregation translate cpumap.
1309 */
1310 nr = perf_cpu_map__max(evsel_list->core.cpus);
1311 stat_config.cpus_aggr_map = perf_cpu_map__empty_new(nr + 1);
1312 return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
1313 }
1314
1315 static void perf_stat__exit_aggr_mode(void)
1316 {
1317 perf_cpu_map__put(stat_config.aggr_map);
1318 perf_cpu_map__put(stat_config.cpus_aggr_map);
1319 stat_config.aggr_map = NULL;
1320 stat_config.cpus_aggr_map = NULL;
1321 }
1322
1323 static inline int perf_env__get_cpu(struct perf_env *env, struct perf_cpu_map *map, int idx)
1324 {
1325 int cpu;
1326
1327 if (idx > map->nr)
1328 return -1;
1329
1330 cpu = map->map[idx];
1331
1332 if (cpu >= env->nr_cpus_avail)
1333 return -1;
1334
1335 return cpu;
1336 }
1337
1338 static int perf_env__get_socket(struct perf_cpu_map *map, int idx, void *data)
1339 {
1340 struct perf_env *env = data;
1341 int cpu = perf_env__get_cpu(env, map, idx);
1342
1343 return cpu == -1 ? -1 : env->cpu[cpu].socket_id;
1344 }
1345
1346 static int perf_env__get_die(struct perf_cpu_map *map, int idx, void *data)
1347 {
1348 struct perf_env *env = data;
1349 int die_id = -1, cpu = perf_env__get_cpu(env, map, idx);
1350
1351 if (cpu != -1) {
1352 /*
1353 * Encode socket in bit range 15:8
1354 * die_id is relative to socket,
1355 * we need a global id. So we combine
1356 * socket + die id
1357 */
1358 if (WARN_ONCE(env->cpu[cpu].socket_id >> 8, "The socket id number is too big.\n"))
1359 return -1;
1360
1361 if (WARN_ONCE(env->cpu[cpu].die_id >> 8, "The die id number is too big.\n"))
1362 return -1;
1363
1364 die_id = (env->cpu[cpu].socket_id << 8) | (env->cpu[cpu].die_id & 0xff);
1365 }
1366
1367 return die_id;
1368 }
1369
1370 static int perf_env__get_core(struct perf_cpu_map *map, int idx, void *data)
1371 {
1372 struct perf_env *env = data;
1373 int core = -1, cpu = perf_env__get_cpu(env, map, idx);
1374
1375 if (cpu != -1) {
1376 /*
1377 * Encode socket in bit range 31:24
1378 * encode die id in bit range 23:16
1379 * core_id is relative to socket and die,
1380 * we need a global id. So we combine
1381 * socket + die id + core id
1382 */
1383 if (WARN_ONCE(env->cpu[cpu].socket_id >> 8, "The socket id number is too big.\n"))
1384 return -1;
1385
1386 if (WARN_ONCE(env->cpu[cpu].die_id >> 8, "The die id number is too big.\n"))
1387 return -1;
1388
1389 if (WARN_ONCE(env->cpu[cpu].core_id >> 16, "The core id number is too big.\n"))
1390 return -1;
1391
1392 core = (env->cpu[cpu].socket_id << 24) |
1393 (env->cpu[cpu].die_id << 16) |
1394 (env->cpu[cpu].core_id & 0xffff);
1395 }
1396
1397 return core;
1398 }
1399
1400 static int perf_env__get_node(struct perf_cpu_map *map, int idx, void *data)
1401 {
1402 int cpu = perf_env__get_cpu(data, map, idx);
1403
1404 return perf_env__numa_node(data, cpu);
1405 }
1406
1407 static int perf_env__build_socket_map(struct perf_env *env, struct perf_cpu_map *cpus,
1408 struct perf_cpu_map **sockp)
1409 {
1410 return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
1411 }
1412
1413 static int perf_env__build_die_map(struct perf_env *env, struct perf_cpu_map *cpus,
1414 struct perf_cpu_map **diep)
1415 {
1416 return cpu_map__build_map(cpus, diep, perf_env__get_die, env);
1417 }
1418
1419 static int perf_env__build_core_map(struct perf_env *env, struct perf_cpu_map *cpus,
1420 struct perf_cpu_map **corep)
1421 {
1422 return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
1423 }
1424
1425 static int perf_env__build_node_map(struct perf_env *env, struct perf_cpu_map *cpus,
1426 struct perf_cpu_map **nodep)
1427 {
1428 return cpu_map__build_map(cpus, nodep, perf_env__get_node, env);
1429 }
1430
1431 static int perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused,
1432 struct perf_cpu_map *map, int idx)
1433 {
1434 return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
1435 }
1436 static int perf_stat__get_die_file(struct perf_stat_config *config __maybe_unused,
1437 struct perf_cpu_map *map, int idx)
1438 {
1439 return perf_env__get_die(map, idx, &perf_stat.session->header.env);
1440 }
1441
1442 static int perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused,
1443 struct perf_cpu_map *map, int idx)
1444 {
1445 return perf_env__get_core(map, idx, &perf_stat.session->header.env);
1446 }
1447
1448 static int perf_stat__get_node_file(struct perf_stat_config *config __maybe_unused,
1449 struct perf_cpu_map *map, int idx)
1450 {
1451 return perf_env__get_node(map, idx, &perf_stat.session->header.env);
1452 }
1453
1454 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
1455 {
1456 struct perf_env *env = &st->session->header.env;
1457
1458 switch (stat_config.aggr_mode) {
1459 case AGGR_SOCKET:
1460 if (perf_env__build_socket_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1461 perror("cannot build socket map");
1462 return -1;
1463 }
1464 stat_config.aggr_get_id = perf_stat__get_socket_file;
1465 break;
1466 case AGGR_DIE:
1467 if (perf_env__build_die_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1468 perror("cannot build die map");
1469 return -1;
1470 }
1471 stat_config.aggr_get_id = perf_stat__get_die_file;
1472 break;
1473 case AGGR_CORE:
1474 if (perf_env__build_core_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1475 perror("cannot build core map");
1476 return -1;
1477 }
1478 stat_config.aggr_get_id = perf_stat__get_core_file;
1479 break;
1480 case AGGR_NODE:
1481 if (perf_env__build_node_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1482 perror("cannot build core map");
1483 return -1;
1484 }
1485 stat_config.aggr_get_id = perf_stat__get_node_file;
1486 break;
1487 case AGGR_NONE:
1488 case AGGR_GLOBAL:
1489 case AGGR_THREAD:
1490 case AGGR_UNSET:
1491 default:
1492 break;
1493 }
1494
1495 return 0;
1496 }
1497
1498 static int topdown_filter_events(const char **attr, char **str, bool use_group)
1499 {
1500 int off = 0;
1501 int i;
1502 int len = 0;
1503 char *s;
1504
1505 for (i = 0; attr[i]; i++) {
1506 if (pmu_have_event("cpu", attr[i])) {
1507 len += strlen(attr[i]) + 1;
1508 attr[i - off] = attr[i];
1509 } else
1510 off++;
1511 }
1512 attr[i - off] = NULL;
1513
1514 *str = malloc(len + 1 + 2);
1515 if (!*str)
1516 return -1;
1517 s = *str;
1518 if (i - off == 0) {
1519 *s = 0;
1520 return 0;
1521 }
1522 if (use_group)
1523 *s++ = '{';
1524 for (i = 0; attr[i]; i++) {
1525 strcpy(s, attr[i]);
1526 s += strlen(s);
1527 *s++ = ',';
1528 }
1529 if (use_group) {
1530 s[-1] = '}';
1531 *s = 0;
1532 } else
1533 s[-1] = 0;
1534 return 0;
1535 }
1536
1537 __weak bool arch_topdown_check_group(bool *warn)
1538 {
1539 *warn = false;
1540 return false;
1541 }
1542
1543 __weak void arch_topdown_group_warn(void)
1544 {
1545 }
1546
1547 /*
1548 * Add default attributes, if there were no attributes specified or
1549 * if -d/--detailed, -d -d or -d -d -d is used:
1550 */
1551 static int add_default_attributes(void)
1552 {
1553 int err;
1554 struct perf_event_attr default_attrs0[] = {
1555
1556 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
1557 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
1558 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
1559 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
1560
1561 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
1562 };
1563 struct perf_event_attr frontend_attrs[] = {
1564 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1565 };
1566 struct perf_event_attr backend_attrs[] = {
1567 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
1568 };
1569 struct perf_event_attr default_attrs1[] = {
1570 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
1571 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
1572 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
1573
1574 };
1575
1576 /*
1577 * Detailed stats (-d), covering the L1 and last level data caches:
1578 */
1579 struct perf_event_attr detailed_attrs[] = {
1580
1581 { .type = PERF_TYPE_HW_CACHE,
1582 .config =
1583 PERF_COUNT_HW_CACHE_L1D << 0 |
1584 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1585 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1586
1587 { .type = PERF_TYPE_HW_CACHE,
1588 .config =
1589 PERF_COUNT_HW_CACHE_L1D << 0 |
1590 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1591 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1592
1593 { .type = PERF_TYPE_HW_CACHE,
1594 .config =
1595 PERF_COUNT_HW_CACHE_LL << 0 |
1596 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1597 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1598
1599 { .type = PERF_TYPE_HW_CACHE,
1600 .config =
1601 PERF_COUNT_HW_CACHE_LL << 0 |
1602 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1603 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1604 };
1605
1606 /*
1607 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1608 */
1609 struct perf_event_attr very_detailed_attrs[] = {
1610
1611 { .type = PERF_TYPE_HW_CACHE,
1612 .config =
1613 PERF_COUNT_HW_CACHE_L1I << 0 |
1614 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1615 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1616
1617 { .type = PERF_TYPE_HW_CACHE,
1618 .config =
1619 PERF_COUNT_HW_CACHE_L1I << 0 |
1620 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1621 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1622
1623 { .type = PERF_TYPE_HW_CACHE,
1624 .config =
1625 PERF_COUNT_HW_CACHE_DTLB << 0 |
1626 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1627 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1628
1629 { .type = PERF_TYPE_HW_CACHE,
1630 .config =
1631 PERF_COUNT_HW_CACHE_DTLB << 0 |
1632 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1633 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1634
1635 { .type = PERF_TYPE_HW_CACHE,
1636 .config =
1637 PERF_COUNT_HW_CACHE_ITLB << 0 |
1638 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1639 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1640
1641 { .type = PERF_TYPE_HW_CACHE,
1642 .config =
1643 PERF_COUNT_HW_CACHE_ITLB << 0 |
1644 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1645 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1646
1647 };
1648
1649 /*
1650 * Very, very detailed stats (-d -d -d), adding prefetch events:
1651 */
1652 struct perf_event_attr very_very_detailed_attrs[] = {
1653
1654 { .type = PERF_TYPE_HW_CACHE,
1655 .config =
1656 PERF_COUNT_HW_CACHE_L1D << 0 |
1657 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1658 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1659
1660 { .type = PERF_TYPE_HW_CACHE,
1661 .config =
1662 PERF_COUNT_HW_CACHE_L1D << 0 |
1663 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1664 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1665 };
1666 struct parse_events_error errinfo;
1667
1668 /* Set attrs if no event is selected and !null_run: */
1669 if (stat_config.null_run)
1670 return 0;
1671
1672 bzero(&errinfo, sizeof(errinfo));
1673 if (transaction_run) {
1674 /* Handle -T as -M transaction. Once platform specific metrics
1675 * support has been added to the json files, all archictures
1676 * will use this approach. To determine transaction support
1677 * on an architecture test for such a metric name.
1678 */
1679 if (metricgroup__has_metric("transaction")) {
1680 struct option opt = { .value = &evsel_list };
1681
1682 return metricgroup__parse_groups(&opt, "transaction",
1683 stat_config.metric_no_group,
1684 stat_config.metric_no_merge,
1685 &stat_config.metric_events);
1686 }
1687
1688 if (pmu_have_event("cpu", "cycles-ct") &&
1689 pmu_have_event("cpu", "el-start"))
1690 err = parse_events(evsel_list, transaction_attrs,
1691 &errinfo);
1692 else
1693 err = parse_events(evsel_list,
1694 transaction_limited_attrs,
1695 &errinfo);
1696 if (err) {
1697 fprintf(stderr, "Cannot set up transaction events\n");
1698 parse_events_print_error(&errinfo, transaction_attrs);
1699 return -1;
1700 }
1701 return 0;
1702 }
1703
1704 if (smi_cost) {
1705 int smi;
1706
1707 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
1708 fprintf(stderr, "freeze_on_smi is not supported.\n");
1709 return -1;
1710 }
1711
1712 if (!smi) {
1713 if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) {
1714 fprintf(stderr, "Failed to set freeze_on_smi.\n");
1715 return -1;
1716 }
1717 smi_reset = true;
1718 }
1719
1720 if (pmu_have_event("msr", "aperf") &&
1721 pmu_have_event("msr", "smi")) {
1722 if (!force_metric_only)
1723 stat_config.metric_only = true;
1724 err = parse_events(evsel_list, smi_cost_attrs, &errinfo);
1725 } else {
1726 fprintf(stderr, "To measure SMI cost, it needs "
1727 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n");
1728 parse_events_print_error(&errinfo, smi_cost_attrs);
1729 return -1;
1730 }
1731 if (err) {
1732 parse_events_print_error(&errinfo, smi_cost_attrs);
1733 fprintf(stderr, "Cannot set up SMI cost events\n");
1734 return -1;
1735 }
1736 return 0;
1737 }
1738
1739 if (topdown_run) {
1740 char *str = NULL;
1741 bool warn = false;
1742
1743 if (stat_config.aggr_mode != AGGR_GLOBAL &&
1744 stat_config.aggr_mode != AGGR_CORE) {
1745 pr_err("top down event configuration requires --per-core mode\n");
1746 return -1;
1747 }
1748 stat_config.aggr_mode = AGGR_CORE;
1749 if (nr_cgroups || !target__has_cpu(&target)) {
1750 pr_err("top down event configuration requires system-wide mode (-a)\n");
1751 return -1;
1752 }
1753
1754 if (!force_metric_only)
1755 stat_config.metric_only = true;
1756 if (topdown_filter_events(topdown_attrs, &str,
1757 arch_topdown_check_group(&warn)) < 0) {
1758 pr_err("Out of memory\n");
1759 return -1;
1760 }
1761 if (topdown_attrs[0] && str) {
1762 if (warn)
1763 arch_topdown_group_warn();
1764 err = parse_events(evsel_list, str, &errinfo);
1765 if (err) {
1766 fprintf(stderr,
1767 "Cannot set up top down events %s: %d\n",
1768 str, err);
1769 parse_events_print_error(&errinfo, str);
1770 free(str);
1771 return -1;
1772 }
1773 } else {
1774 fprintf(stderr, "System does not support topdown\n");
1775 return -1;
1776 }
1777 free(str);
1778 }
1779
1780 if (!evsel_list->core.nr_entries) {
1781 if (target__has_cpu(&target))
1782 default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
1783
1784 if (evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
1785 return -1;
1786 if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
1787 if (evlist__add_default_attrs(evsel_list, frontend_attrs) < 0)
1788 return -1;
1789 }
1790 if (pmu_have_event("cpu", "stalled-cycles-backend")) {
1791 if (evlist__add_default_attrs(evsel_list, backend_attrs) < 0)
1792 return -1;
1793 }
1794 if (evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
1795 return -1;
1796 }
1797
1798 /* Detailed events get appended to the event list: */
1799
1800 if (detailed_run < 1)
1801 return 0;
1802
1803 /* Append detailed run extra attributes: */
1804 if (evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1805 return -1;
1806
1807 if (detailed_run < 2)
1808 return 0;
1809
1810 /* Append very detailed run extra attributes: */
1811 if (evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1812 return -1;
1813
1814 if (detailed_run < 3)
1815 return 0;
1816
1817 /* Append very, very detailed run extra attributes: */
1818 return evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1819 }
1820
1821 static const char * const stat_record_usage[] = {
1822 "perf stat record [<options>]",
1823 NULL,
1824 };
1825
1826 static void init_features(struct perf_session *session)
1827 {
1828 int feat;
1829
1830 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
1831 perf_header__set_feat(&session->header, feat);
1832
1833 perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT);
1834 perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
1835 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
1836 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
1837 perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
1838 }
1839
1840 static int __cmd_record(int argc, const char **argv)
1841 {
1842 struct perf_session *session;
1843 struct perf_data *data = &perf_stat.data;
1844
1845 argc = parse_options(argc, argv, stat_options, stat_record_usage,
1846 PARSE_OPT_STOP_AT_NON_OPTION);
1847
1848 if (output_name)
1849 data->path = output_name;
1850
1851 if (stat_config.run_count != 1 || forever) {
1852 pr_err("Cannot use -r option with perf stat record.\n");
1853 return -1;
1854 }
1855
1856 session = perf_session__new(data, false, NULL);
1857 if (IS_ERR(session)) {
1858 pr_err("Perf session creation failed\n");
1859 return PTR_ERR(session);
1860 }
1861
1862 init_features(session);
1863
1864 session->evlist = evsel_list;
1865 perf_stat.session = session;
1866 perf_stat.record = true;
1867 return argc;
1868 }
1869
1870 static int process_stat_round_event(struct perf_session *session,
1871 union perf_event *event)
1872 {
1873 struct perf_record_stat_round *stat_round = &event->stat_round;
1874 struct evsel *counter;
1875 struct timespec tsh, *ts = NULL;
1876 const char **argv = session->header.env.cmdline_argv;
1877 int argc = session->header.env.nr_cmdline;
1878
1879 evlist__for_each_entry(evsel_list, counter)
1880 perf_stat_process_counter(&stat_config, counter);
1881
1882 if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
1883 update_stats(&walltime_nsecs_stats, stat_round->time);
1884
1885 if (stat_config.interval && stat_round->time) {
1886 tsh.tv_sec = stat_round->time / NSEC_PER_SEC;
1887 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
1888 ts = &tsh;
1889 }
1890
1891 print_counters(ts, argc, argv);
1892 return 0;
1893 }
1894
1895 static
1896 int process_stat_config_event(struct perf_session *session,
1897 union perf_event *event)
1898 {
1899 struct perf_tool *tool = session->tool;
1900 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1901
1902 perf_event__read_stat_config(&stat_config, &event->stat_config);
1903
1904 if (perf_cpu_map__empty(st->cpus)) {
1905 if (st->aggr_mode != AGGR_UNSET)
1906 pr_warning("warning: processing task data, aggregation mode not set\n");
1907 return 0;
1908 }
1909
1910 if (st->aggr_mode != AGGR_UNSET)
1911 stat_config.aggr_mode = st->aggr_mode;
1912
1913 if (perf_stat.data.is_pipe)
1914 perf_stat_init_aggr_mode();
1915 else
1916 perf_stat_init_aggr_mode_file(st);
1917
1918 return 0;
1919 }
1920
1921 static int set_maps(struct perf_stat *st)
1922 {
1923 if (!st->cpus || !st->threads)
1924 return 0;
1925
1926 if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
1927 return -EINVAL;
1928
1929 perf_evlist__set_maps(&evsel_list->core, st->cpus, st->threads);
1930
1931 if (perf_evlist__alloc_stats(evsel_list, true))
1932 return -ENOMEM;
1933
1934 st->maps_allocated = true;
1935 return 0;
1936 }
1937
1938 static
1939 int process_thread_map_event(struct perf_session *session,
1940 union perf_event *event)
1941 {
1942 struct perf_tool *tool = session->tool;
1943 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1944
1945 if (st->threads) {
1946 pr_warning("Extra thread map event, ignoring.\n");
1947 return 0;
1948 }
1949
1950 st->threads = thread_map__new_event(&event->thread_map);
1951 if (!st->threads)
1952 return -ENOMEM;
1953
1954 return set_maps(st);
1955 }
1956
1957 static
1958 int process_cpu_map_event(struct perf_session *session,
1959 union perf_event *event)
1960 {
1961 struct perf_tool *tool = session->tool;
1962 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1963 struct perf_cpu_map *cpus;
1964
1965 if (st->cpus) {
1966 pr_warning("Extra cpu map event, ignoring.\n");
1967 return 0;
1968 }
1969
1970 cpus = cpu_map__new_data(&event->cpu_map.data);
1971 if (!cpus)
1972 return -ENOMEM;
1973
1974 st->cpus = cpus;
1975 return set_maps(st);
1976 }
1977
1978 static const char * const stat_report_usage[] = {
1979 "perf stat report [<options>]",
1980 NULL,
1981 };
1982
1983 static struct perf_stat perf_stat = {
1984 .tool = {
1985 .attr = perf_event__process_attr,
1986 .event_update = perf_event__process_event_update,
1987 .thread_map = process_thread_map_event,
1988 .cpu_map = process_cpu_map_event,
1989 .stat_config = process_stat_config_event,
1990 .stat = perf_event__process_stat_event,
1991 .stat_round = process_stat_round_event,
1992 },
1993 .aggr_mode = AGGR_UNSET,
1994 };
1995
1996 static int __cmd_report(int argc, const char **argv)
1997 {
1998 struct perf_session *session;
1999 const struct option options[] = {
2000 OPT_STRING('i', "input", &input_name, "file", "input file name"),
2001 OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
2002 "aggregate counts per processor socket", AGGR_SOCKET),
2003 OPT_SET_UINT(0, "per-die", &perf_stat.aggr_mode,
2004 "aggregate counts per processor die", AGGR_DIE),
2005 OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
2006 "aggregate counts per physical processor core", AGGR_CORE),
2007 OPT_SET_UINT(0, "per-node", &perf_stat.aggr_mode,
2008 "aggregate counts per numa node", AGGR_NODE),
2009 OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
2010 "disable CPU count aggregation", AGGR_NONE),
2011 OPT_END()
2012 };
2013 struct stat st;
2014 int ret;
2015
2016 argc = parse_options(argc, argv, options, stat_report_usage, 0);
2017
2018 if (!input_name || !strlen(input_name)) {
2019 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
2020 input_name = "-";
2021 else
2022 input_name = "perf.data";
2023 }
2024
2025 perf_stat.data.path = input_name;
2026 perf_stat.data.mode = PERF_DATA_MODE_READ;
2027
2028 session = perf_session__new(&perf_stat.data, false, &perf_stat.tool);
2029 if (IS_ERR(session))
2030 return PTR_ERR(session);
2031
2032 perf_stat.session = session;
2033 stat_config.output = stderr;
2034 evsel_list = session->evlist;
2035
2036 ret = perf_session__process_events(session);
2037 if (ret)
2038 return ret;
2039
2040 perf_session__delete(session);
2041 return 0;
2042 }
2043
2044 static void setup_system_wide(int forks)
2045 {
2046 /*
2047 * Make system wide (-a) the default target if
2048 * no target was specified and one of following
2049 * conditions is met:
2050 *
2051 * - there's no workload specified
2052 * - there is workload specified but all requested
2053 * events are system wide events
2054 */
2055 if (!target__none(&target))
2056 return;
2057
2058 if (!forks)
2059 target.system_wide = true;
2060 else {
2061 struct evsel *counter;
2062
2063 evlist__for_each_entry(evsel_list, counter) {
2064 if (!counter->core.system_wide)
2065 return;
2066 }
2067
2068 if (evsel_list->core.nr_entries)
2069 target.system_wide = true;
2070 }
2071 }
2072
2073 int cmd_stat(int argc, const char **argv)
2074 {
2075 const char * const stat_usage[] = {
2076 "perf stat [<options>] [<command>]",
2077 NULL
2078 };
2079 int status = -EINVAL, run_idx;
2080 const char *mode;
2081 FILE *output = stderr;
2082 unsigned int interval, timeout;
2083 const char * const stat_subcommands[] = { "record", "report" };
2084
2085 setlocale(LC_ALL, "");
2086
2087 evsel_list = evlist__new();
2088 if (evsel_list == NULL)
2089 return -ENOMEM;
2090
2091 parse_events__shrink_config_terms();
2092
2093 /* String-parsing callback-based options would segfault when negated */
2094 set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG);
2095 set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG);
2096 set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG);
2097
2098 argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
2099 (const char **) stat_usage,
2100 PARSE_OPT_STOP_AT_NON_OPTION);
2101 perf_stat__collect_metric_expr(evsel_list);
2102 perf_stat__init_shadow_stats();
2103
2104 if (stat_config.csv_sep) {
2105 stat_config.csv_output = true;
2106 if (!strcmp(stat_config.csv_sep, "\\t"))
2107 stat_config.csv_sep = "\t";
2108 } else
2109 stat_config.csv_sep = DEFAULT_SEPARATOR;
2110
2111 if (argc && !strncmp(argv[0], "rec", 3)) {
2112 argc = __cmd_record(argc, argv);
2113 if (argc < 0)
2114 return -1;
2115 } else if (argc && !strncmp(argv[0], "rep", 3))
2116 return __cmd_report(argc, argv);
2117
2118 interval = stat_config.interval;
2119 timeout = stat_config.timeout;
2120
2121 /*
2122 * For record command the -o is already taken care of.
2123 */
2124 if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
2125 output = NULL;
2126
2127 if (output_name && output_fd) {
2128 fprintf(stderr, "cannot use both --output and --log-fd\n");
2129 parse_options_usage(stat_usage, stat_options, "o", 1);
2130 parse_options_usage(NULL, stat_options, "log-fd", 0);
2131 goto out;
2132 }
2133
2134 if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) {
2135 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
2136 goto out;
2137 }
2138
2139 if (stat_config.metric_only && stat_config.run_count > 1) {
2140 fprintf(stderr, "--metric-only is not supported with -r\n");
2141 goto out;
2142 }
2143
2144 if (stat_config.walltime_run_table && stat_config.run_count <= 1) {
2145 fprintf(stderr, "--table is only supported with -r\n");
2146 parse_options_usage(stat_usage, stat_options, "r", 1);
2147 parse_options_usage(NULL, stat_options, "table", 0);
2148 goto out;
2149 }
2150
2151 if (output_fd < 0) {
2152 fprintf(stderr, "argument to --log-fd must be a > 0\n");
2153 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
2154 goto out;
2155 }
2156
2157 if (!output) {
2158 struct timespec tm;
2159 mode = append_file ? "a" : "w";
2160
2161 output = fopen(output_name, mode);
2162 if (!output) {
2163 perror("failed to create output file");
2164 return -1;
2165 }
2166 clock_gettime(CLOCK_REALTIME, &tm);
2167 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
2168 } else if (output_fd > 0) {
2169 mode = append_file ? "a" : "w";
2170 output = fdopen(output_fd, mode);
2171 if (!output) {
2172 perror("Failed opening logfd");
2173 return -errno;
2174 }
2175 }
2176
2177 stat_config.output = output;
2178
2179 /*
2180 * let the spreadsheet do the pretty-printing
2181 */
2182 if (stat_config.csv_output) {
2183 /* User explicitly passed -B? */
2184 if (big_num_opt == 1) {
2185 fprintf(stderr, "-B option not supported with -x\n");
2186 parse_options_usage(stat_usage, stat_options, "B", 1);
2187 parse_options_usage(NULL, stat_options, "x", 1);
2188 goto out;
2189 } else /* Nope, so disable big number formatting */
2190 stat_config.big_num = false;
2191 } else if (big_num_opt == 0) /* User passed --no-big-num */
2192 stat_config.big_num = false;
2193
2194 setup_system_wide(argc);
2195
2196 /*
2197 * Display user/system times only for single
2198 * run and when there's specified tracee.
2199 */
2200 if ((stat_config.run_count == 1) && target__none(&target))
2201 stat_config.ru_display = true;
2202
2203 if (stat_config.run_count < 0) {
2204 pr_err("Run count must be a positive number\n");
2205 parse_options_usage(stat_usage, stat_options, "r", 1);
2206 goto out;
2207 } else if (stat_config.run_count == 0) {
2208 forever = true;
2209 stat_config.run_count = 1;
2210 }
2211
2212 if (stat_config.walltime_run_table) {
2213 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0]));
2214 if (!stat_config.walltime_run) {
2215 pr_err("failed to setup -r option");
2216 goto out;
2217 }
2218 }
2219
2220 if ((stat_config.aggr_mode == AGGR_THREAD) &&
2221 !target__has_task(&target)) {
2222 if (!target.system_wide || target.cpu_list) {
2223 fprintf(stderr, "The --per-thread option is only "
2224 "available when monitoring via -p -t -a "
2225 "options or only --per-thread.\n");
2226 parse_options_usage(NULL, stat_options, "p", 1);
2227 parse_options_usage(NULL, stat_options, "t", 1);
2228 goto out;
2229 }
2230 }
2231
2232 /*
2233 * no_aggr, cgroup are for system-wide only
2234 * --per-thread is aggregated per thread, we dont mix it with cpu mode
2235 */
2236 if (((stat_config.aggr_mode != AGGR_GLOBAL &&
2237 stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
2238 !target__has_cpu(&target)) {
2239 fprintf(stderr, "both cgroup and no-aggregation "
2240 "modes only available in system-wide mode\n");
2241
2242 parse_options_usage(stat_usage, stat_options, "G", 1);
2243 parse_options_usage(NULL, stat_options, "A", 1);
2244 parse_options_usage(NULL, stat_options, "a", 1);
2245 goto out;
2246 }
2247
2248 if (add_default_attributes())
2249 goto out;
2250
2251 target__validate(&target);
2252
2253 if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
2254 target.per_thread = true;
2255
2256 if (perf_evlist__create_maps(evsel_list, &target) < 0) {
2257 if (target__has_task(&target)) {
2258 pr_err("Problems finding threads of monitor\n");
2259 parse_options_usage(stat_usage, stat_options, "p", 1);
2260 parse_options_usage(NULL, stat_options, "t", 1);
2261 } else if (target__has_cpu(&target)) {
2262 perror("failed to parse CPUs map");
2263 parse_options_usage(stat_usage, stat_options, "C", 1);
2264 parse_options_usage(NULL, stat_options, "a", 1);
2265 }
2266 goto out;
2267 }
2268
2269 evlist__check_cpu_maps(evsel_list);
2270
2271 /*
2272 * Initialize thread_map with comm names,
2273 * so we could print it out on output.
2274 */
2275 if (stat_config.aggr_mode == AGGR_THREAD) {
2276 thread_map__read_comms(evsel_list->core.threads);
2277 if (target.system_wide) {
2278 if (runtime_stat_new(&stat_config,
2279 perf_thread_map__nr(evsel_list->core.threads))) {
2280 goto out;
2281 }
2282 }
2283 }
2284
2285 if (stat_config.aggr_mode == AGGR_NODE)
2286 cpu__setup_cpunode_map();
2287
2288 if (stat_config.times && interval)
2289 interval_count = true;
2290 else if (stat_config.times && !interval) {
2291 pr_err("interval-count option should be used together with "
2292 "interval-print.\n");
2293 parse_options_usage(stat_usage, stat_options, "interval-count", 0);
2294 parse_options_usage(stat_usage, stat_options, "I", 1);
2295 goto out;
2296 }
2297
2298 if (timeout && timeout < 100) {
2299 if (timeout < 10) {
2300 pr_err("timeout must be >= 10ms.\n");
2301 parse_options_usage(stat_usage, stat_options, "timeout", 0);
2302 goto out;
2303 } else
2304 pr_warning("timeout < 100ms. "
2305 "The overhead percentage could be high in some cases. "
2306 "Please proceed with caution.\n");
2307 }
2308 if (timeout && interval) {
2309 pr_err("timeout option is not supported with interval-print.\n");
2310 parse_options_usage(stat_usage, stat_options, "timeout", 0);
2311 parse_options_usage(stat_usage, stat_options, "I", 1);
2312 goto out;
2313 }
2314
2315 if (perf_evlist__alloc_stats(evsel_list, interval))
2316 goto out;
2317
2318 if (perf_stat_init_aggr_mode())
2319 goto out;
2320
2321 /*
2322 * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
2323 * while avoiding that older tools show confusing messages.
2324 *
2325 * However for pipe sessions we need to keep it zero,
2326 * because script's perf_evsel__check_attr is triggered
2327 * by attr->sample_type != 0, and we can't run it on
2328 * stat sessions.
2329 */
2330 stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe);
2331
2332 /*
2333 * We dont want to block the signals - that would cause
2334 * child tasks to inherit that and Ctrl-C would not work.
2335 * What we want is for Ctrl-C to work in the exec()-ed
2336 * task, but being ignored by perf stat itself:
2337 */
2338 atexit(sig_atexit);
2339 if (!forever)
2340 signal(SIGINT, skip_signal);
2341 signal(SIGCHLD, skip_signal);
2342 signal(SIGALRM, skip_signal);
2343 signal(SIGABRT, skip_signal);
2344
2345 if (evlist__initialize_ctlfd(evsel_list, stat_config.ctl_fd, stat_config.ctl_fd_ack))
2346 goto out;
2347
2348 status = 0;
2349 for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) {
2350 if (stat_config.run_count != 1 && verbose > 0)
2351 fprintf(output, "[ perf stat: executing run #%d ... ]\n",
2352 run_idx + 1);
2353
2354 if (run_idx != 0)
2355 perf_evlist__reset_prev_raw_counts(evsel_list);
2356
2357 status = run_perf_stat(argc, argv, run_idx);
2358 if (forever && status != -1 && !interval) {
2359 print_counters(NULL, argc, argv);
2360 perf_stat__reset_stats();
2361 }
2362 }
2363
2364 if (!forever && status != -1 && (!interval || stat_config.summary))
2365 print_counters(NULL, argc, argv);
2366
2367 evlist__finalize_ctlfd(evsel_list);
2368
2369 if (STAT_RECORD) {
2370 /*
2371 * We synthesize the kernel mmap record just so that older tools
2372 * don't emit warnings about not being able to resolve symbols
2373 * due to /proc/sys/kernel/kptr_restrict settings and instear provide
2374 * a saner message about no samples being in the perf.data file.
2375 *
2376 * This also serves to suppress a warning about f_header.data.size == 0
2377 * in header.c at the moment 'perf stat record' gets introduced, which
2378 * is not really needed once we start adding the stat specific PERF_RECORD_
2379 * records, but the need to suppress the kptr_restrict messages in older
2380 * tools remain -acme
2381 */
2382 int fd = perf_data__fd(&perf_stat.data);
2383 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
2384 process_synthesized_event,
2385 &perf_stat.session->machines.host);
2386 if (err) {
2387 pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
2388 "older tools may produce warnings about this file\n.");
2389 }
2390
2391 if (!interval) {
2392 if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
2393 pr_err("failed to write stat round event\n");
2394 }
2395
2396 if (!perf_stat.data.is_pipe) {
2397 perf_stat.session->header.data_size += perf_stat.bytes_written;
2398 perf_session__write_header(perf_stat.session, evsel_list, fd, true);
2399 }
2400
2401 evlist__close(evsel_list);
2402 perf_session__delete(perf_stat.session);
2403 }
2404
2405 perf_stat__exit_aggr_mode();
2406 perf_evlist__free_stats(evsel_list);
2407 out:
2408 zfree(&stat_config.walltime_run);
2409
2410 if (smi_cost && smi_reset)
2411 sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
2412
2413 evlist__delete(evsel_list);
2414
2415 metricgroup__rblist_exit(&stat_config.metric_events);
2416 runtime_stat_delete(&stat_config);
2417
2418 return status;
2419 }
Linux with added FPC-III support