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Linux 5.7.7
[linux/fpc-iii.git] / tools / perf / builtin-stat.c
blobec053dc1e35c82cede6708175d899f0ea7a3831d
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 "asm/bug.h"
70
71 #include <linux/time64.h>
72 #include <linux/zalloc.h>
73 #include <api/fs/fs.h>
74 #include <errno.h>
75 #include <signal.h>
76 #include <stdlib.h>
77 #include <sys/prctl.h>
78 #include <inttypes.h>
79 #include <locale.h>
80 #include <math.h>
81 #include <sys/types.h>
82 #include <sys/stat.h>
83 #include <sys/wait.h>
84 #include <unistd.h>
85 #include <sys/time.h>
86 #include <sys/resource.h>
87 #include <linux/err.h>
88
89 #include <linux/ctype.h>
90 #include <perf/evlist.h>
91
92 #define DEFAULT_SEPARATOR " "
93 #define FREEZE_ON_SMI_PATH "devices/cpu/freeze_on_smi"
94
95 static void print_counters(struct timespec *ts, int argc, const char **argv);
96
97 /* Default events used for perf stat -T */
98 static const char *transaction_attrs = {
99 "task-clock,"
100 "{"
101 "instructions,"
102 "cycles,"
103 "cpu/cycles-t/,"
104 "cpu/tx-start/,"
105 "cpu/el-start/,"
106 "cpu/cycles-ct/"
107 "}"
108 };
109
110 /* More limited version when the CPU does not have all events. */
111 static const char * transaction_limited_attrs = {
112 "task-clock,"
113 "{"
114 "instructions,"
115 "cycles,"
116 "cpu/cycles-t/,"
117 "cpu/tx-start/"
118 "}"
119 };
120
121 static const char * topdown_attrs[] = {
122 "topdown-total-slots",
123 "topdown-slots-retired",
124 "topdown-recovery-bubbles",
125 "topdown-fetch-bubbles",
126 "topdown-slots-issued",
127 NULL,
128 };
129
130 static const char *smi_cost_attrs = {
131 "{"
132 "msr/aperf/,"
133 "msr/smi/,"
134 "cycles"
135 "}"
136 };
137
138 static struct evlist *evsel_list;
139
140 static struct target target = {
141 .uid = UINT_MAX,
142 };
143
144 #define METRIC_ONLY_LEN 20
145
146 static volatile pid_t child_pid = -1;
147 static int detailed_run = 0;
148 static bool transaction_run;
149 static bool topdown_run = false;
150 static bool smi_cost = false;
151 static bool smi_reset = false;
152 static int big_num_opt = -1;
153 static bool group = false;
154 static const char *pre_cmd = NULL;
155 static const char *post_cmd = NULL;
156 static bool sync_run = false;
157 static bool forever = false;
158 static bool force_metric_only = false;
159 static struct timespec ref_time;
160 static bool append_file;
161 static bool interval_count;
162 static const char *output_name;
163 static int output_fd;
164
165 struct perf_stat {
166 bool record;
167 struct perf_data data;
168 struct perf_session *session;
169 u64 bytes_written;
170 struct perf_tool tool;
171 bool maps_allocated;
172 struct perf_cpu_map *cpus;
173 struct perf_thread_map *threads;
174 enum aggr_mode aggr_mode;
175 };
176
177 static struct perf_stat perf_stat;
178 #define STAT_RECORD perf_stat.record
179
180 static volatile int done = 0;
181
182 static struct perf_stat_config stat_config = {
183 .aggr_mode = AGGR_GLOBAL,
184 .scale = true,
185 .unit_width = 4, /* strlen("unit") */
186 .run_count = 1,
187 .metric_only_len = METRIC_ONLY_LEN,
188 .walltime_nsecs_stats = &walltime_nsecs_stats,
189 .big_num = true,
190 };
191
192 static inline void diff_timespec(struct timespec *r, struct timespec *a,
193 struct timespec *b)
194 {
195 r->tv_sec = a->tv_sec - b->tv_sec;
196 if (a->tv_nsec < b->tv_nsec) {
197 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
198 r->tv_sec--;
199 } else {
200 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
201 }
202 }
203
204 static void perf_stat__reset_stats(void)
205 {
206 int i;
207
208 perf_evlist__reset_stats(evsel_list);
209 perf_stat__reset_shadow_stats();
210
211 for (i = 0; i < stat_config.stats_num; i++)
212 perf_stat__reset_shadow_per_stat(&stat_config.stats[i]);
213 }
214
215 static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
216 union perf_event *event,
217 struct perf_sample *sample __maybe_unused,
218 struct machine *machine __maybe_unused)
219 {
220 if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) {
221 pr_err("failed to write perf data, error: %m\n");
222 return -1;
223 }
224
225 perf_stat.bytes_written += event->header.size;
226 return 0;
227 }
228
229 static int write_stat_round_event(u64 tm, u64 type)
230 {
231 return perf_event__synthesize_stat_round(NULL, tm, type,
232 process_synthesized_event,
233 NULL);
234 }
235
236 #define WRITE_STAT_ROUND_EVENT(time, interval) \
237 write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
238
239 #define SID(e, x, y) xyarray__entry(e->core.sample_id, x, y)
240
241 static int
242 perf_evsel__write_stat_event(struct evsel *counter, u32 cpu, u32 thread,
243 struct perf_counts_values *count)
244 {
245 struct perf_sample_id *sid = SID(counter, cpu, thread);
246
247 return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
248 process_synthesized_event, NULL);
249 }
250
251 static int read_single_counter(struct evsel *counter, int cpu,
252 int thread, struct timespec *rs)
253 {
254 if (counter->tool_event == PERF_TOOL_DURATION_TIME) {
255 u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL;
256 struct perf_counts_values *count =
257 perf_counts(counter->counts, cpu, thread);
258 count->ena = count->run = val;
259 count->val = val;
260 return 0;
261 }
262 return perf_evsel__read_counter(counter, cpu, thread);
263 }
264
265 /*
266 * Read out the results of a single counter:
267 * do not aggregate counts across CPUs in system-wide mode
268 */
269 static int read_counter_cpu(struct evsel *counter, struct timespec *rs, int cpu)
270 {
271 int nthreads = perf_thread_map__nr(evsel_list->core.threads);
272 int thread;
273
274 if (!counter->supported)
275 return -ENOENT;
276
277 if (counter->core.system_wide)
278 nthreads = 1;
279
280 for (thread = 0; thread < nthreads; thread++) {
281 struct perf_counts_values *count;
282
283 count = perf_counts(counter->counts, cpu, thread);
284
285 /*
286 * The leader's group read loads data into its group members
287 * (via perf_evsel__read_counter()) and sets their count->loaded.
288 */
289 if (!perf_counts__is_loaded(counter->counts, cpu, thread) &&
290 read_single_counter(counter, cpu, thread, rs)) {
291 counter->counts->scaled = -1;
292 perf_counts(counter->counts, cpu, thread)->ena = 0;
293 perf_counts(counter->counts, cpu, thread)->run = 0;
294 return -1;
295 }
296
297 perf_counts__set_loaded(counter->counts, cpu, thread, false);
298
299 if (STAT_RECORD) {
300 if (perf_evsel__write_stat_event(counter, cpu, thread, count)) {
301 pr_err("failed to write stat event\n");
302 return -1;
303 }
304 }
305
306 if (verbose > 1) {
307 fprintf(stat_config.output,
308 "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
309 perf_evsel__name(counter),
310 cpu,
311 count->val, count->ena, count->run);
312 }
313 }
314
315 return 0;
316 }
317
318 static void read_counters(struct timespec *rs)
319 {
320 struct evsel *counter;
321 struct affinity affinity;
322 int i, ncpus, cpu;
323
324 if (affinity__setup(&affinity) < 0)
325 return;
326
327 ncpus = perf_cpu_map__nr(evsel_list->core.all_cpus);
328 if (!target__has_cpu(&target) || target__has_per_thread(&target))
329 ncpus = 1;
330 evlist__for_each_cpu(evsel_list, i, cpu) {
331 if (i >= ncpus)
332 break;
333 affinity__set(&affinity, cpu);
334
335 evlist__for_each_entry(evsel_list, counter) {
336 if (evsel__cpu_iter_skip(counter, cpu))
337 continue;
338 if (!counter->err) {
339 counter->err = read_counter_cpu(counter, rs,
340 counter->cpu_iter - 1);
341 }
342 }
343 }
344 affinity__cleanup(&affinity);
345
346 evlist__for_each_entry(evsel_list, counter) {
347 if (counter->err)
348 pr_debug("failed to read counter %s\n", counter->name);
349 if (counter->err == 0 && perf_stat_process_counter(&stat_config, counter))
350 pr_warning("failed to process counter %s\n", counter->name);
351 counter->err = 0;
352 }
353 }
354
355 static void process_interval(void)
356 {
357 struct timespec ts, rs;
358
359 clock_gettime(CLOCK_MONOTONIC, &ts);
360 diff_timespec(&rs, &ts, &ref_time);
361
362 read_counters(&rs);
363
364 if (STAT_RECORD) {
365 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
366 pr_err("failed to write stat round event\n");
367 }
368
369 init_stats(&walltime_nsecs_stats);
370 update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000);
371 print_counters(&rs, 0, NULL);
372 }
373
374 static void enable_counters(void)
375 {
376 if (stat_config.initial_delay)
377 usleep(stat_config.initial_delay * USEC_PER_MSEC);
378
379 /*
380 * We need to enable counters only if:
381 * - we don't have tracee (attaching to task or cpu)
382 * - we have initial delay configured
383 */
384 if (!target__none(&target) || stat_config.initial_delay)
385 evlist__enable(evsel_list);
386 }
387
388 static void disable_counters(void)
389 {
390 /*
391 * If we don't have tracee (attaching to task or cpu), counters may
392 * still be running. To get accurate group ratios, we must stop groups
393 * from counting before reading their constituent counters.
394 */
395 if (!target__none(&target))
396 evlist__disable(evsel_list);
397 }
398
399 static volatile int workload_exec_errno;
400
401 /*
402 * perf_evlist__prepare_workload will send a SIGUSR1
403 * if the fork fails, since we asked by setting its
404 * want_signal to true.
405 */
406 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
407 void *ucontext __maybe_unused)
408 {
409 workload_exec_errno = info->si_value.sival_int;
410 }
411
412 static bool perf_evsel__should_store_id(struct evsel *counter)
413 {
414 return STAT_RECORD || counter->core.attr.read_format & PERF_FORMAT_ID;
415 }
416
417 static bool is_target_alive(struct target *_target,
418 struct perf_thread_map *threads)
419 {
420 struct stat st;
421 int i;
422
423 if (!target__has_task(_target))
424 return true;
425
426 for (i = 0; i < threads->nr; i++) {
427 char path[PATH_MAX];
428
429 scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(),
430 threads->map[i].pid);
431
432 if (!stat(path, &st))
433 return true;
434 }
435
436 return false;
437 }
438
439 enum counter_recovery {
440 COUNTER_SKIP,
441 COUNTER_RETRY,
442 COUNTER_FATAL,
443 };
444
445 static enum counter_recovery stat_handle_error(struct evsel *counter)
446 {
447 char msg[BUFSIZ];
448 /*
449 * PPC returns ENXIO for HW counters until 2.6.37
450 * (behavior changed with commit b0a873e).
451 */
452 if (errno == EINVAL || errno == ENOSYS ||
453 errno == ENOENT || errno == EOPNOTSUPP ||
454 errno == ENXIO) {
455 if (verbose > 0)
456 ui__warning("%s event is not supported by the kernel.\n",
457 perf_evsel__name(counter));
458 counter->supported = false;
459 /*
460 * errored is a sticky flag that means one of the counter's
461 * cpu event had a problem and needs to be reexamined.
462 */
463 counter->errored = true;
464
465 if ((counter->leader != counter) ||
466 !(counter->leader->core.nr_members > 1))
467 return COUNTER_SKIP;
468 } else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
469 if (verbose > 0)
470 ui__warning("%s\n", msg);
471 return COUNTER_RETRY;
472 } else if (target__has_per_thread(&target) &&
473 evsel_list->core.threads &&
474 evsel_list->core.threads->err_thread != -1) {
475 /*
476 * For global --per-thread case, skip current
477 * error thread.
478 */
479 if (!thread_map__remove(evsel_list->core.threads,
480 evsel_list->core.threads->err_thread)) {
481 evsel_list->core.threads->err_thread = -1;
482 return COUNTER_RETRY;
483 }
484 }
485
486 perf_evsel__open_strerror(counter, &target,
487 errno, msg, sizeof(msg));
488 ui__error("%s\n", msg);
489
490 if (child_pid != -1)
491 kill(child_pid, SIGTERM);
492 return COUNTER_FATAL;
493 }
494
495 static int __run_perf_stat(int argc, const char **argv, int run_idx)
496 {
497 int interval = stat_config.interval;
498 int times = stat_config.times;
499 int timeout = stat_config.timeout;
500 char msg[BUFSIZ];
501 unsigned long long t0, t1;
502 struct evsel *counter;
503 struct timespec ts;
504 size_t l;
505 int status = 0;
506 const bool forks = (argc > 0);
507 bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false;
508 struct affinity affinity;
509 int i, cpu;
510 bool second_pass = false;
511
512 if (interval) {
513 ts.tv_sec = interval / USEC_PER_MSEC;
514 ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC;
515 } else if (timeout) {
516 ts.tv_sec = timeout / USEC_PER_MSEC;
517 ts.tv_nsec = (timeout % USEC_PER_MSEC) * NSEC_PER_MSEC;
518 } else {
519 ts.tv_sec = 1;
520 ts.tv_nsec = 0;
521 }
522
523 if (forks) {
524 if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe,
525 workload_exec_failed_signal) < 0) {
526 perror("failed to prepare workload");
527 return -1;
528 }
529 child_pid = evsel_list->workload.pid;
530 }
531
532 if (group)
533 perf_evlist__set_leader(evsel_list);
534
535 if (affinity__setup(&affinity) < 0)
536 return -1;
537
538 evlist__for_each_cpu (evsel_list, i, cpu) {
539 affinity__set(&affinity, cpu);
540
541 evlist__for_each_entry(evsel_list, counter) {
542 if (evsel__cpu_iter_skip(counter, cpu))
543 continue;
544 if (counter->reset_group || counter->errored)
545 continue;
546 try_again:
547 if (create_perf_stat_counter(counter, &stat_config, &target,
548 counter->cpu_iter - 1) < 0) {
549
550 /*
551 * Weak group failed. We cannot just undo this here
552 * because earlier CPUs might be in group mode, and the kernel
553 * doesn't support mixing group and non group reads. Defer
554 * it to later.
555 * Don't close here because we're in the wrong affinity.
556 */
557 if ((errno == EINVAL || errno == EBADF) &&
558 counter->leader != counter &&
559 counter->weak_group) {
560 perf_evlist__reset_weak_group(evsel_list, counter, false);
561 assert(counter->reset_group);
562 second_pass = true;
563 continue;
564 }
565
566 switch (stat_handle_error(counter)) {
567 case COUNTER_FATAL:
568 return -1;
569 case COUNTER_RETRY:
570 goto try_again;
571 case COUNTER_SKIP:
572 continue;
573 default:
574 break;
575 }
576
577 }
578 counter->supported = true;
579 }
580 }
581
582 if (second_pass) {
583 /*
584 * Now redo all the weak group after closing them,
585 * and also close errored counters.
586 */
587
588 evlist__for_each_cpu(evsel_list, i, cpu) {
589 affinity__set(&affinity, cpu);
590 /* First close errored or weak retry */
591 evlist__for_each_entry(evsel_list, counter) {
592 if (!counter->reset_group && !counter->errored)
593 continue;
594 if (evsel__cpu_iter_skip_no_inc(counter, cpu))
595 continue;
596 perf_evsel__close_cpu(&counter->core, counter->cpu_iter);
597 }
598 /* Now reopen weak */
599 evlist__for_each_entry(evsel_list, counter) {
600 if (!counter->reset_group && !counter->errored)
601 continue;
602 if (evsel__cpu_iter_skip(counter, cpu))
603 continue;
604 if (!counter->reset_group)
605 continue;
606 try_again_reset:
607 pr_debug2("reopening weak %s\n", perf_evsel__name(counter));
608 if (create_perf_stat_counter(counter, &stat_config, &target,
609 counter->cpu_iter - 1) < 0) {
610
611 switch (stat_handle_error(counter)) {
612 case COUNTER_FATAL:
613 return -1;
614 case COUNTER_RETRY:
615 goto try_again_reset;
616 case COUNTER_SKIP:
617 continue;
618 default:
619 break;
620 }
621 }
622 counter->supported = true;
623 }
624 }
625 }
626 affinity__cleanup(&affinity);
627
628 evlist__for_each_entry(evsel_list, counter) {
629 if (!counter->supported) {
630 perf_evsel__free_fd(&counter->core);
631 continue;
632 }
633
634 l = strlen(counter->unit);
635 if (l > stat_config.unit_width)
636 stat_config.unit_width = l;
637
638 if (perf_evsel__should_store_id(counter) &&
639 perf_evsel__store_ids(counter, evsel_list))
640 return -1;
641 }
642
643 if (perf_evlist__apply_filters(evsel_list, &counter)) {
644 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
645 counter->filter, perf_evsel__name(counter), errno,
646 str_error_r(errno, msg, sizeof(msg)));
647 return -1;
648 }
649
650 if (STAT_RECORD) {
651 int err, fd = perf_data__fd(&perf_stat.data);
652
653 if (is_pipe) {
654 err = perf_header__write_pipe(perf_data__fd(&perf_stat.data));
655 } else {
656 err = perf_session__write_header(perf_stat.session, evsel_list,
657 fd, false);
658 }
659
660 if (err < 0)
661 return err;
662
663 err = perf_event__synthesize_stat_events(&stat_config, NULL, evsel_list,
664 process_synthesized_event, is_pipe);
665 if (err < 0)
666 return err;
667 }
668
669 /*
670 * Enable counters and exec the command:
671 */
672 t0 = rdclock();
673 clock_gettime(CLOCK_MONOTONIC, &ref_time);
674
675 if (forks) {
676 perf_evlist__start_workload(evsel_list);
677 enable_counters();
678
679 if (interval || timeout) {
680 while (!waitpid(child_pid, &status, WNOHANG)) {
681 nanosleep(&ts, NULL);
682 if (timeout)
683 break;
684 process_interval();
685 if (interval_count && !(--times))
686 break;
687 }
688 }
689 if (child_pid != -1)
690 wait4(child_pid, &status, 0, &stat_config.ru_data);
691
692 if (workload_exec_errno) {
693 const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
694 pr_err("Workload failed: %s\n", emsg);
695 return -1;
696 }
697
698 if (WIFSIGNALED(status))
699 psignal(WTERMSIG(status), argv[0]);
700 } else {
701 enable_counters();
702 while (!done) {
703 nanosleep(&ts, NULL);
704 if (!is_target_alive(&target, evsel_list->core.threads))
705 break;
706 if (timeout)
707 break;
708 if (interval) {
709 process_interval();
710 if (interval_count && !(--times))
711 break;
712 }
713 }
714 }
715
716 disable_counters();
717
718 t1 = rdclock();
719
720 if (stat_config.walltime_run_table)
721 stat_config.walltime_run[run_idx] = t1 - t0;
722
723 update_stats(&walltime_nsecs_stats, t1 - t0);
724
725 /*
726 * Closing a group leader splits the group, and as we only disable
727 * group leaders, results in remaining events becoming enabled. To
728 * avoid arbitrary skew, we must read all counters before closing any
729 * group leaders.
730 */
731 read_counters(&(struct timespec) { .tv_nsec = t1-t0 });
732
733 /*
734 * We need to keep evsel_list alive, because it's processed
735 * later the evsel_list will be closed after.
736 */
737 if (!STAT_RECORD)
738 evlist__close(evsel_list);
739
740 return WEXITSTATUS(status);
741 }
742
743 static int run_perf_stat(int argc, const char **argv, int run_idx)
744 {
745 int ret;
746
747 if (pre_cmd) {
748 ret = system(pre_cmd);
749 if (ret)
750 return ret;
751 }
752
753 if (sync_run)
754 sync();
755
756 ret = __run_perf_stat(argc, argv, run_idx);
757 if (ret)
758 return ret;
759
760 if (post_cmd) {
761 ret = system(post_cmd);
762 if (ret)
763 return ret;
764 }
765
766 return ret;
767 }
768
769 static void print_counters(struct timespec *ts, int argc, const char **argv)
770 {
771 /* Do not print anything if we record to the pipe. */
772 if (STAT_RECORD && perf_stat.data.is_pipe)
773 return;
774
775 perf_evlist__print_counters(evsel_list, &stat_config, &target,
776 ts, argc, argv);
777 }
778
779 static volatile int signr = -1;
780
781 static void skip_signal(int signo)
782 {
783 if ((child_pid == -1) || stat_config.interval)
784 done = 1;
785
786 signr = signo;
787 /*
788 * render child_pid harmless
789 * won't send SIGTERM to a random
790 * process in case of race condition
791 * and fast PID recycling
792 */
793 child_pid = -1;
794 }
795
796 static void sig_atexit(void)
797 {
798 sigset_t set, oset;
799
800 /*
801 * avoid race condition with SIGCHLD handler
802 * in skip_signal() which is modifying child_pid
803 * goal is to avoid send SIGTERM to a random
804 * process
805 */
806 sigemptyset(&set);
807 sigaddset(&set, SIGCHLD);
808 sigprocmask(SIG_BLOCK, &set, &oset);
809
810 if (child_pid != -1)
811 kill(child_pid, SIGTERM);
812
813 sigprocmask(SIG_SETMASK, &oset, NULL);
814
815 if (signr == -1)
816 return;
817
818 signal(signr, SIG_DFL);
819 kill(getpid(), signr);
820 }
821
822 static int stat__set_big_num(const struct option *opt __maybe_unused,
823 const char *s __maybe_unused, int unset)
824 {
825 big_num_opt = unset ? 0 : 1;
826 return 0;
827 }
828
829 static int enable_metric_only(const struct option *opt __maybe_unused,
830 const char *s __maybe_unused, int unset)
831 {
832 force_metric_only = true;
833 stat_config.metric_only = !unset;
834 return 0;
835 }
836
837 static int parse_metric_groups(const struct option *opt,
838 const char *str,
839 int unset __maybe_unused)
840 {
841 return metricgroup__parse_groups(opt, str, &stat_config.metric_events);
842 }
843
844 static struct option stat_options[] = {
845 OPT_BOOLEAN('T', "transaction", &transaction_run,
846 "hardware transaction statistics"),
847 OPT_CALLBACK('e', "event", &evsel_list, "event",
848 "event selector. use 'perf list' to list available events",
849 parse_events_option),
850 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
851 "event filter", parse_filter),
852 OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit,
853 "child tasks do not inherit counters"),
854 OPT_STRING('p', "pid", &target.pid, "pid",
855 "stat events on existing process id"),
856 OPT_STRING('t', "tid", &target.tid, "tid",
857 "stat events on existing thread id"),
858 OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
859 "system-wide collection from all CPUs"),
860 OPT_BOOLEAN('g', "group", &group,
861 "put the counters into a counter group"),
862 OPT_BOOLEAN(0, "scale", &stat_config.scale,
863 "Use --no-scale to disable counter scaling for multiplexing"),
864 OPT_INCR('v', "verbose", &verbose,
865 "be more verbose (show counter open errors, etc)"),
866 OPT_INTEGER('r', "repeat", &stat_config.run_count,
867 "repeat command and print average + stddev (max: 100, forever: 0)"),
868 OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table,
869 "display details about each run (only with -r option)"),
870 OPT_BOOLEAN('n', "null", &stat_config.null_run,
871 "null run - dont start any counters"),
872 OPT_INCR('d', "detailed", &detailed_run,
873 "detailed run - start a lot of events"),
874 OPT_BOOLEAN('S', "sync", &sync_run,
875 "call sync() before starting a run"),
876 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
877 "print large numbers with thousands\' separators",
878 stat__set_big_num),
879 OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
880 "list of cpus to monitor in system-wide"),
881 OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
882 "disable CPU count aggregation", AGGR_NONE),
883 OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"),
884 OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator",
885 "print counts with custom separator"),
886 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
887 "monitor event in cgroup name only", parse_cgroups),
888 OPT_STRING('o', "output", &output_name, "file", "output file name"),
889 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
890 OPT_INTEGER(0, "log-fd", &output_fd,
891 "log output to fd, instead of stderr"),
892 OPT_STRING(0, "pre", &pre_cmd, "command",
893 "command to run prior to the measured command"),
894 OPT_STRING(0, "post", &post_cmd, "command",
895 "command to run after to the measured command"),
896 OPT_UINTEGER('I', "interval-print", &stat_config.interval,
897 "print counts at regular interval in ms "
898 "(overhead is possible for values <= 100ms)"),
899 OPT_INTEGER(0, "interval-count", &stat_config.times,
900 "print counts for fixed number of times"),
901 OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear,
902 "clear screen in between new interval"),
903 OPT_UINTEGER(0, "timeout", &stat_config.timeout,
904 "stop workload and print counts after a timeout period in ms (>= 10ms)"),
905 OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
906 "aggregate counts per processor socket", AGGR_SOCKET),
907 OPT_SET_UINT(0, "per-die", &stat_config.aggr_mode,
908 "aggregate counts per processor die", AGGR_DIE),
909 OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
910 "aggregate counts per physical processor core", AGGR_CORE),
911 OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
912 "aggregate counts per thread", AGGR_THREAD),
913 OPT_SET_UINT(0, "per-node", &stat_config.aggr_mode,
914 "aggregate counts per numa node", AGGR_NODE),
915 OPT_UINTEGER('D', "delay", &stat_config.initial_delay,
916 "ms to wait before starting measurement after program start"),
917 OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL,
918 "Only print computed metrics. No raw values", enable_metric_only),
919 OPT_BOOLEAN(0, "topdown", &topdown_run,
920 "measure topdown level 1 statistics"),
921 OPT_BOOLEAN(0, "smi-cost", &smi_cost,
922 "measure SMI cost"),
923 OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
924 "monitor specified metrics or metric groups (separated by ,)",
925 parse_metric_groups),
926 OPT_BOOLEAN_FLAG(0, "all-kernel", &stat_config.all_kernel,
927 "Configure all used events to run in kernel space.",
928 PARSE_OPT_EXCLUSIVE),
929 OPT_BOOLEAN_FLAG(0, "all-user", &stat_config.all_user,
930 "Configure all used events to run in user space.",
931 PARSE_OPT_EXCLUSIVE),
932 OPT_BOOLEAN(0, "percore-show-thread", &stat_config.percore_show_thread,
933 "Use with 'percore' event qualifier to show the event "
934 "counts of one hardware thread by sum up total hardware "
935 "threads of same physical core"),
936 OPT_END()
937 };
938
939 static int perf_stat__get_socket(struct perf_stat_config *config __maybe_unused,
940 struct perf_cpu_map *map, int cpu)
941 {
942 return cpu_map__get_socket(map, cpu, NULL);
943 }
944
945 static int perf_stat__get_die(struct perf_stat_config *config __maybe_unused,
946 struct perf_cpu_map *map, int cpu)
947 {
948 return cpu_map__get_die(map, cpu, NULL);
949 }
950
951 static int perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
952 struct perf_cpu_map *map, int cpu)
953 {
954 return cpu_map__get_core(map, cpu, NULL);
955 }
956
957 static int perf_stat__get_node(struct perf_stat_config *config __maybe_unused,
958 struct perf_cpu_map *map, int cpu)
959 {
960 return cpu_map__get_node(map, cpu, NULL);
961 }
962
963 static int perf_stat__get_aggr(struct perf_stat_config *config,
964 aggr_get_id_t get_id, struct perf_cpu_map *map, int idx)
965 {
966 int cpu;
967
968 if (idx >= map->nr)
969 return -1;
970
971 cpu = map->map[idx];
972
973 if (config->cpus_aggr_map->map[cpu] == -1)
974 config->cpus_aggr_map->map[cpu] = get_id(config, map, idx);
975
976 return config->cpus_aggr_map->map[cpu];
977 }
978
979 static int perf_stat__get_socket_cached(struct perf_stat_config *config,
980 struct perf_cpu_map *map, int idx)
981 {
982 return perf_stat__get_aggr(config, perf_stat__get_socket, map, idx);
983 }
984
985 static int perf_stat__get_die_cached(struct perf_stat_config *config,
986 struct perf_cpu_map *map, int idx)
987 {
988 return perf_stat__get_aggr(config, perf_stat__get_die, map, idx);
989 }
990
991 static int perf_stat__get_core_cached(struct perf_stat_config *config,
992 struct perf_cpu_map *map, int idx)
993 {
994 return perf_stat__get_aggr(config, perf_stat__get_core, map, idx);
995 }
996
997 static int perf_stat__get_node_cached(struct perf_stat_config *config,
998 struct perf_cpu_map *map, int idx)
999 {
1000 return perf_stat__get_aggr(config, perf_stat__get_node, map, idx);
1001 }
1002
1003 static bool term_percore_set(void)
1004 {
1005 struct evsel *counter;
1006
1007 evlist__for_each_entry(evsel_list, counter) {
1008 if (counter->percore)
1009 return true;
1010 }
1011
1012 return false;
1013 }
1014
1015 static int perf_stat_init_aggr_mode(void)
1016 {
1017 int nr;
1018
1019 switch (stat_config.aggr_mode) {
1020 case AGGR_SOCKET:
1021 if (cpu_map__build_socket_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1022 perror("cannot build socket map");
1023 return -1;
1024 }
1025 stat_config.aggr_get_id = perf_stat__get_socket_cached;
1026 break;
1027 case AGGR_DIE:
1028 if (cpu_map__build_die_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1029 perror("cannot build die map");
1030 return -1;
1031 }
1032 stat_config.aggr_get_id = perf_stat__get_die_cached;
1033 break;
1034 case AGGR_CORE:
1035 if (cpu_map__build_core_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1036 perror("cannot build core map");
1037 return -1;
1038 }
1039 stat_config.aggr_get_id = perf_stat__get_core_cached;
1040 break;
1041 case AGGR_NODE:
1042 if (cpu_map__build_node_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1043 perror("cannot build core map");
1044 return -1;
1045 }
1046 stat_config.aggr_get_id = perf_stat__get_node_cached;
1047 break;
1048 case AGGR_NONE:
1049 if (term_percore_set()) {
1050 if (cpu_map__build_core_map(evsel_list->core.cpus,
1051 &stat_config.aggr_map)) {
1052 perror("cannot build core map");
1053 return -1;
1054 }
1055 stat_config.aggr_get_id = perf_stat__get_core_cached;
1056 }
1057 break;
1058 case AGGR_GLOBAL:
1059 case AGGR_THREAD:
1060 case AGGR_UNSET:
1061 default:
1062 break;
1063 }
1064
1065 /*
1066 * The evsel_list->cpus is the base we operate on,
1067 * taking the highest cpu number to be the size of
1068 * the aggregation translate cpumap.
1069 */
1070 nr = perf_cpu_map__max(evsel_list->core.cpus);
1071 stat_config.cpus_aggr_map = perf_cpu_map__empty_new(nr + 1);
1072 return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
1073 }
1074
1075 static void perf_stat__exit_aggr_mode(void)
1076 {
1077 perf_cpu_map__put(stat_config.aggr_map);
1078 perf_cpu_map__put(stat_config.cpus_aggr_map);
1079 stat_config.aggr_map = NULL;
1080 stat_config.cpus_aggr_map = NULL;
1081 }
1082
1083 static inline int perf_env__get_cpu(struct perf_env *env, struct perf_cpu_map *map, int idx)
1084 {
1085 int cpu;
1086
1087 if (idx > map->nr)
1088 return -1;
1089
1090 cpu = map->map[idx];
1091
1092 if (cpu >= env->nr_cpus_avail)
1093 return -1;
1094
1095 return cpu;
1096 }
1097
1098 static int perf_env__get_socket(struct perf_cpu_map *map, int idx, void *data)
1099 {
1100 struct perf_env *env = data;
1101 int cpu = perf_env__get_cpu(env, map, idx);
1102
1103 return cpu == -1 ? -1 : env->cpu[cpu].socket_id;
1104 }
1105
1106 static int perf_env__get_die(struct perf_cpu_map *map, int idx, void *data)
1107 {
1108 struct perf_env *env = data;
1109 int die_id = -1, cpu = perf_env__get_cpu(env, map, idx);
1110
1111 if (cpu != -1) {
1112 /*
1113 * Encode socket in bit range 15:8
1114 * die_id is relative to socket,
1115 * we need a global id. So we combine
1116 * socket + die id
1117 */
1118 if (WARN_ONCE(env->cpu[cpu].socket_id >> 8, "The socket id number is too big.\n"))
1119 return -1;
1120
1121 if (WARN_ONCE(env->cpu[cpu].die_id >> 8, "The die id number is too big.\n"))
1122 return -1;
1123
1124 die_id = (env->cpu[cpu].socket_id << 8) | (env->cpu[cpu].die_id & 0xff);
1125 }
1126
1127 return die_id;
1128 }
1129
1130 static int perf_env__get_core(struct perf_cpu_map *map, int idx, void *data)
1131 {
1132 struct perf_env *env = data;
1133 int core = -1, cpu = perf_env__get_cpu(env, map, idx);
1134
1135 if (cpu != -1) {
1136 /*
1137 * Encode socket in bit range 31:24
1138 * encode die id in bit range 23:16
1139 * core_id is relative to socket and die,
1140 * we need a global id. So we combine
1141 * socket + die id + core id
1142 */
1143 if (WARN_ONCE(env->cpu[cpu].socket_id >> 8, "The socket id number is too big.\n"))
1144 return -1;
1145
1146 if (WARN_ONCE(env->cpu[cpu].die_id >> 8, "The die id number is too big.\n"))
1147 return -1;
1148
1149 if (WARN_ONCE(env->cpu[cpu].core_id >> 16, "The core id number is too big.\n"))
1150 return -1;
1151
1152 core = (env->cpu[cpu].socket_id << 24) |
1153 (env->cpu[cpu].die_id << 16) |
1154 (env->cpu[cpu].core_id & 0xffff);
1155 }
1156
1157 return core;
1158 }
1159
1160 static int perf_env__get_node(struct perf_cpu_map *map, int idx, void *data)
1161 {
1162 int cpu = perf_env__get_cpu(data, map, idx);
1163
1164 return perf_env__numa_node(data, cpu);
1165 }
1166
1167 static int perf_env__build_socket_map(struct perf_env *env, struct perf_cpu_map *cpus,
1168 struct perf_cpu_map **sockp)
1169 {
1170 return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
1171 }
1172
1173 static int perf_env__build_die_map(struct perf_env *env, struct perf_cpu_map *cpus,
1174 struct perf_cpu_map **diep)
1175 {
1176 return cpu_map__build_map(cpus, diep, perf_env__get_die, env);
1177 }
1178
1179 static int perf_env__build_core_map(struct perf_env *env, struct perf_cpu_map *cpus,
1180 struct perf_cpu_map **corep)
1181 {
1182 return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
1183 }
1184
1185 static int perf_env__build_node_map(struct perf_env *env, struct perf_cpu_map *cpus,
1186 struct perf_cpu_map **nodep)
1187 {
1188 return cpu_map__build_map(cpus, nodep, perf_env__get_node, env);
1189 }
1190
1191 static int perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused,
1192 struct perf_cpu_map *map, int idx)
1193 {
1194 return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
1195 }
1196 static int perf_stat__get_die_file(struct perf_stat_config *config __maybe_unused,
1197 struct perf_cpu_map *map, int idx)
1198 {
1199 return perf_env__get_die(map, idx, &perf_stat.session->header.env);
1200 }
1201
1202 static int perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused,
1203 struct perf_cpu_map *map, int idx)
1204 {
1205 return perf_env__get_core(map, idx, &perf_stat.session->header.env);
1206 }
1207
1208 static int perf_stat__get_node_file(struct perf_stat_config *config __maybe_unused,
1209 struct perf_cpu_map *map, int idx)
1210 {
1211 return perf_env__get_node(map, idx, &perf_stat.session->header.env);
1212 }
1213
1214 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
1215 {
1216 struct perf_env *env = &st->session->header.env;
1217
1218 switch (stat_config.aggr_mode) {
1219 case AGGR_SOCKET:
1220 if (perf_env__build_socket_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1221 perror("cannot build socket map");
1222 return -1;
1223 }
1224 stat_config.aggr_get_id = perf_stat__get_socket_file;
1225 break;
1226 case AGGR_DIE:
1227 if (perf_env__build_die_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1228 perror("cannot build die map");
1229 return -1;
1230 }
1231 stat_config.aggr_get_id = perf_stat__get_die_file;
1232 break;
1233 case AGGR_CORE:
1234 if (perf_env__build_core_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1235 perror("cannot build core map");
1236 return -1;
1237 }
1238 stat_config.aggr_get_id = perf_stat__get_core_file;
1239 break;
1240 case AGGR_NODE:
1241 if (perf_env__build_node_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1242 perror("cannot build core map");
1243 return -1;
1244 }
1245 stat_config.aggr_get_id = perf_stat__get_node_file;
1246 break;
1247 case AGGR_NONE:
1248 case AGGR_GLOBAL:
1249 case AGGR_THREAD:
1250 case AGGR_UNSET:
1251 default:
1252 break;
1253 }
1254
1255 return 0;
1256 }
1257
1258 static int topdown_filter_events(const char **attr, char **str, bool use_group)
1259 {
1260 int off = 0;
1261 int i;
1262 int len = 0;
1263 char *s;
1264
1265 for (i = 0; attr[i]; i++) {
1266 if (pmu_have_event("cpu", attr[i])) {
1267 len += strlen(attr[i]) + 1;
1268 attr[i - off] = attr[i];
1269 } else
1270 off++;
1271 }
1272 attr[i - off] = NULL;
1273
1274 *str = malloc(len + 1 + 2);
1275 if (!*str)
1276 return -1;
1277 s = *str;
1278 if (i - off == 0) {
1279 *s = 0;
1280 return 0;
1281 }
1282 if (use_group)
1283 *s++ = '{';
1284 for (i = 0; attr[i]; i++) {
1285 strcpy(s, attr[i]);
1286 s += strlen(s);
1287 *s++ = ',';
1288 }
1289 if (use_group) {
1290 s[-1] = '}';
1291 *s = 0;
1292 } else
1293 s[-1] = 0;
1294 return 0;
1295 }
1296
1297 __weak bool arch_topdown_check_group(bool *warn)
1298 {
1299 *warn = false;
1300 return false;
1301 }
1302
1303 __weak void arch_topdown_group_warn(void)
1304 {
1305 }
1306
1307 /*
1308 * Add default attributes, if there were no attributes specified or
1309 * if -d/--detailed, -d -d or -d -d -d is used:
1310 */
1311 static int add_default_attributes(void)
1312 {
1313 int err;
1314 struct perf_event_attr default_attrs0[] = {
1315
1316 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
1317 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
1318 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
1319 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
1320
1321 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
1322 };
1323 struct perf_event_attr frontend_attrs[] = {
1324 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1325 };
1326 struct perf_event_attr backend_attrs[] = {
1327 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
1328 };
1329 struct perf_event_attr default_attrs1[] = {
1330 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
1331 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
1332 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
1333
1334 };
1335
1336 /*
1337 * Detailed stats (-d), covering the L1 and last level data caches:
1338 */
1339 struct perf_event_attr detailed_attrs[] = {
1340
1341 { .type = PERF_TYPE_HW_CACHE,
1342 .config =
1343 PERF_COUNT_HW_CACHE_L1D << 0 |
1344 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1345 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1346
1347 { .type = PERF_TYPE_HW_CACHE,
1348 .config =
1349 PERF_COUNT_HW_CACHE_L1D << 0 |
1350 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1351 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1352
1353 { .type = PERF_TYPE_HW_CACHE,
1354 .config =
1355 PERF_COUNT_HW_CACHE_LL << 0 |
1356 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1357 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1358
1359 { .type = PERF_TYPE_HW_CACHE,
1360 .config =
1361 PERF_COUNT_HW_CACHE_LL << 0 |
1362 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1363 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1364 };
1365
1366 /*
1367 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1368 */
1369 struct perf_event_attr very_detailed_attrs[] = {
1370
1371 { .type = PERF_TYPE_HW_CACHE,
1372 .config =
1373 PERF_COUNT_HW_CACHE_L1I << 0 |
1374 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1375 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1376
1377 { .type = PERF_TYPE_HW_CACHE,
1378 .config =
1379 PERF_COUNT_HW_CACHE_L1I << 0 |
1380 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1381 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1382
1383 { .type = PERF_TYPE_HW_CACHE,
1384 .config =
1385 PERF_COUNT_HW_CACHE_DTLB << 0 |
1386 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1387 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1388
1389 { .type = PERF_TYPE_HW_CACHE,
1390 .config =
1391 PERF_COUNT_HW_CACHE_DTLB << 0 |
1392 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1393 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1394
1395 { .type = PERF_TYPE_HW_CACHE,
1396 .config =
1397 PERF_COUNT_HW_CACHE_ITLB << 0 |
1398 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1399 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1400
1401 { .type = PERF_TYPE_HW_CACHE,
1402 .config =
1403 PERF_COUNT_HW_CACHE_ITLB << 0 |
1404 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1405 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1406
1407 };
1408
1409 /*
1410 * Very, very detailed stats (-d -d -d), adding prefetch events:
1411 */
1412 struct perf_event_attr very_very_detailed_attrs[] = {
1413
1414 { .type = PERF_TYPE_HW_CACHE,
1415 .config =
1416 PERF_COUNT_HW_CACHE_L1D << 0 |
1417 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1418 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1419
1420 { .type = PERF_TYPE_HW_CACHE,
1421 .config =
1422 PERF_COUNT_HW_CACHE_L1D << 0 |
1423 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1424 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1425 };
1426 struct parse_events_error errinfo;
1427
1428 /* Set attrs if no event is selected and !null_run: */
1429 if (stat_config.null_run)
1430 return 0;
1431
1432 bzero(&errinfo, sizeof(errinfo));
1433 if (transaction_run) {
1434 /* Handle -T as -M transaction. Once platform specific metrics
1435 * support has been added to the json files, all archictures
1436 * will use this approach. To determine transaction support
1437 * on an architecture test for such a metric name.
1438 */
1439 if (metricgroup__has_metric("transaction")) {
1440 struct option opt = { .value = &evsel_list };
1441
1442 return metricgroup__parse_groups(&opt, "transaction",
1443 &stat_config.metric_events);
1444 }
1445
1446 if (pmu_have_event("cpu", "cycles-ct") &&
1447 pmu_have_event("cpu", "el-start"))
1448 err = parse_events(evsel_list, transaction_attrs,
1449 &errinfo);
1450 else
1451 err = parse_events(evsel_list,
1452 transaction_limited_attrs,
1453 &errinfo);
1454 if (err) {
1455 fprintf(stderr, "Cannot set up transaction events\n");
1456 parse_events_print_error(&errinfo, transaction_attrs);
1457 return -1;
1458 }
1459 return 0;
1460 }
1461
1462 if (smi_cost) {
1463 int smi;
1464
1465 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
1466 fprintf(stderr, "freeze_on_smi is not supported.\n");
1467 return -1;
1468 }
1469
1470 if (!smi) {
1471 if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) {
1472 fprintf(stderr, "Failed to set freeze_on_smi.\n");
1473 return -1;
1474 }
1475 smi_reset = true;
1476 }
1477
1478 if (pmu_have_event("msr", "aperf") &&
1479 pmu_have_event("msr", "smi")) {
1480 if (!force_metric_only)
1481 stat_config.metric_only = true;
1482 err = parse_events(evsel_list, smi_cost_attrs, &errinfo);
1483 } else {
1484 fprintf(stderr, "To measure SMI cost, it needs "
1485 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n");
1486 parse_events_print_error(&errinfo, smi_cost_attrs);
1487 return -1;
1488 }
1489 if (err) {
1490 parse_events_print_error(&errinfo, smi_cost_attrs);
1491 fprintf(stderr, "Cannot set up SMI cost events\n");
1492 return -1;
1493 }
1494 return 0;
1495 }
1496
1497 if (topdown_run) {
1498 char *str = NULL;
1499 bool warn = false;
1500
1501 if (stat_config.aggr_mode != AGGR_GLOBAL &&
1502 stat_config.aggr_mode != AGGR_CORE) {
1503 pr_err("top down event configuration requires --per-core mode\n");
1504 return -1;
1505 }
1506 stat_config.aggr_mode = AGGR_CORE;
1507 if (nr_cgroups || !target__has_cpu(&target)) {
1508 pr_err("top down event configuration requires system-wide mode (-a)\n");
1509 return -1;
1510 }
1511
1512 if (!force_metric_only)
1513 stat_config.metric_only = true;
1514 if (topdown_filter_events(topdown_attrs, &str,
1515 arch_topdown_check_group(&warn)) < 0) {
1516 pr_err("Out of memory\n");
1517 return -1;
1518 }
1519 if (topdown_attrs[0] && str) {
1520 if (warn)
1521 arch_topdown_group_warn();
1522 err = parse_events(evsel_list, str, &errinfo);
1523 if (err) {
1524 fprintf(stderr,
1525 "Cannot set up top down events %s: %d\n",
1526 str, err);
1527 parse_events_print_error(&errinfo, str);
1528 free(str);
1529 return -1;
1530 }
1531 } else {
1532 fprintf(stderr, "System does not support topdown\n");
1533 return -1;
1534 }
1535 free(str);
1536 }
1537
1538 if (!evsel_list->core.nr_entries) {
1539 if (target__has_cpu(&target))
1540 default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
1541
1542 if (perf_evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
1543 return -1;
1544 if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
1545 if (perf_evlist__add_default_attrs(evsel_list,
1546 frontend_attrs) < 0)
1547 return -1;
1548 }
1549 if (pmu_have_event("cpu", "stalled-cycles-backend")) {
1550 if (perf_evlist__add_default_attrs(evsel_list,
1551 backend_attrs) < 0)
1552 return -1;
1553 }
1554 if (perf_evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
1555 return -1;
1556 }
1557
1558 /* Detailed events get appended to the event list: */
1559
1560 if (detailed_run < 1)
1561 return 0;
1562
1563 /* Append detailed run extra attributes: */
1564 if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1565 return -1;
1566
1567 if (detailed_run < 2)
1568 return 0;
1569
1570 /* Append very detailed run extra attributes: */
1571 if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1572 return -1;
1573
1574 if (detailed_run < 3)
1575 return 0;
1576
1577 /* Append very, very detailed run extra attributes: */
1578 return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1579 }
1580
1581 static const char * const stat_record_usage[] = {
1582 "perf stat record [<options>]",
1583 NULL,
1584 };
1585
1586 static void init_features(struct perf_session *session)
1587 {
1588 int feat;
1589
1590 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
1591 perf_header__set_feat(&session->header, feat);
1592
1593 perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT);
1594 perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
1595 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
1596 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
1597 perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
1598 }
1599
1600 static int __cmd_record(int argc, const char **argv)
1601 {
1602 struct perf_session *session;
1603 struct perf_data *data = &perf_stat.data;
1604
1605 argc = parse_options(argc, argv, stat_options, stat_record_usage,
1606 PARSE_OPT_STOP_AT_NON_OPTION);
1607
1608 if (output_name)
1609 data->path = output_name;
1610
1611 if (stat_config.run_count != 1 || forever) {
1612 pr_err("Cannot use -r option with perf stat record.\n");
1613 return -1;
1614 }
1615
1616 session = perf_session__new(data, false, NULL);
1617 if (IS_ERR(session)) {
1618 pr_err("Perf session creation failed\n");
1619 return PTR_ERR(session);
1620 }
1621
1622 init_features(session);
1623
1624 session->evlist = evsel_list;
1625 perf_stat.session = session;
1626 perf_stat.record = true;
1627 return argc;
1628 }
1629
1630 static int process_stat_round_event(struct perf_session *session,
1631 union perf_event *event)
1632 {
1633 struct perf_record_stat_round *stat_round = &event->stat_round;
1634 struct evsel *counter;
1635 struct timespec tsh, *ts = NULL;
1636 const char **argv = session->header.env.cmdline_argv;
1637 int argc = session->header.env.nr_cmdline;
1638
1639 evlist__for_each_entry(evsel_list, counter)
1640 perf_stat_process_counter(&stat_config, counter);
1641
1642 if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
1643 update_stats(&walltime_nsecs_stats, stat_round->time);
1644
1645 if (stat_config.interval && stat_round->time) {
1646 tsh.tv_sec = stat_round->time / NSEC_PER_SEC;
1647 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
1648 ts = &tsh;
1649 }
1650
1651 print_counters(ts, argc, argv);
1652 return 0;
1653 }
1654
1655 static
1656 int process_stat_config_event(struct perf_session *session,
1657 union perf_event *event)
1658 {
1659 struct perf_tool *tool = session->tool;
1660 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1661
1662 perf_event__read_stat_config(&stat_config, &event->stat_config);
1663
1664 if (perf_cpu_map__empty(st->cpus)) {
1665 if (st->aggr_mode != AGGR_UNSET)
1666 pr_warning("warning: processing task data, aggregation mode not set\n");
1667 return 0;
1668 }
1669
1670 if (st->aggr_mode != AGGR_UNSET)
1671 stat_config.aggr_mode = st->aggr_mode;
1672
1673 if (perf_stat.data.is_pipe)
1674 perf_stat_init_aggr_mode();
1675 else
1676 perf_stat_init_aggr_mode_file(st);
1677
1678 return 0;
1679 }
1680
1681 static int set_maps(struct perf_stat *st)
1682 {
1683 if (!st->cpus || !st->threads)
1684 return 0;
1685
1686 if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
1687 return -EINVAL;
1688
1689 perf_evlist__set_maps(&evsel_list->core, st->cpus, st->threads);
1690
1691 if (perf_evlist__alloc_stats(evsel_list, true))
1692 return -ENOMEM;
1693
1694 st->maps_allocated = true;
1695 return 0;
1696 }
1697
1698 static
1699 int process_thread_map_event(struct perf_session *session,
1700 union perf_event *event)
1701 {
1702 struct perf_tool *tool = session->tool;
1703 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1704
1705 if (st->threads) {
1706 pr_warning("Extra thread map event, ignoring.\n");
1707 return 0;
1708 }
1709
1710 st->threads = thread_map__new_event(&event->thread_map);
1711 if (!st->threads)
1712 return -ENOMEM;
1713
1714 return set_maps(st);
1715 }
1716
1717 static
1718 int process_cpu_map_event(struct perf_session *session,
1719 union perf_event *event)
1720 {
1721 struct perf_tool *tool = session->tool;
1722 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1723 struct perf_cpu_map *cpus;
1724
1725 if (st->cpus) {
1726 pr_warning("Extra cpu map event, ignoring.\n");
1727 return 0;
1728 }
1729
1730 cpus = cpu_map__new_data(&event->cpu_map.data);
1731 if (!cpus)
1732 return -ENOMEM;
1733
1734 st->cpus = cpus;
1735 return set_maps(st);
1736 }
1737
1738 static int runtime_stat_new(struct perf_stat_config *config, int nthreads)
1739 {
1740 int i;
1741
1742 config->stats = calloc(nthreads, sizeof(struct runtime_stat));
1743 if (!config->stats)
1744 return -1;
1745
1746 config->stats_num = nthreads;
1747
1748 for (i = 0; i < nthreads; i++)
1749 runtime_stat__init(&config->stats[i]);
1750
1751 return 0;
1752 }
1753
1754 static void runtime_stat_delete(struct perf_stat_config *config)
1755 {
1756 int i;
1757
1758 if (!config->stats)
1759 return;
1760
1761 for (i = 0; i < config->stats_num; i++)
1762 runtime_stat__exit(&config->stats[i]);
1763
1764 zfree(&config->stats);
1765 }
1766
1767 static const char * const stat_report_usage[] = {
1768 "perf stat report [<options>]",
1769 NULL,
1770 };
1771
1772 static struct perf_stat perf_stat = {
1773 .tool = {
1774 .attr = perf_event__process_attr,
1775 .event_update = perf_event__process_event_update,
1776 .thread_map = process_thread_map_event,
1777 .cpu_map = process_cpu_map_event,
1778 .stat_config = process_stat_config_event,
1779 .stat = perf_event__process_stat_event,
1780 .stat_round = process_stat_round_event,
1781 },
1782 .aggr_mode = AGGR_UNSET,
1783 };
1784
1785 static int __cmd_report(int argc, const char **argv)
1786 {
1787 struct perf_session *session;
1788 const struct option options[] = {
1789 OPT_STRING('i', "input", &input_name, "file", "input file name"),
1790 OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
1791 "aggregate counts per processor socket", AGGR_SOCKET),
1792 OPT_SET_UINT(0, "per-die", &perf_stat.aggr_mode,
1793 "aggregate counts per processor die", AGGR_DIE),
1794 OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
1795 "aggregate counts per physical processor core", AGGR_CORE),
1796 OPT_SET_UINT(0, "per-node", &perf_stat.aggr_mode,
1797 "aggregate counts per numa node", AGGR_NODE),
1798 OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
1799 "disable CPU count aggregation", AGGR_NONE),
1800 OPT_END()
1801 };
1802 struct stat st;
1803 int ret;
1804
1805 argc = parse_options(argc, argv, options, stat_report_usage, 0);
1806
1807 if (!input_name || !strlen(input_name)) {
1808 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
1809 input_name = "-";
1810 else
1811 input_name = "perf.data";
1812 }
1813
1814 perf_stat.data.path = input_name;
1815 perf_stat.data.mode = PERF_DATA_MODE_READ;
1816
1817 session = perf_session__new(&perf_stat.data, false, &perf_stat.tool);
1818 if (IS_ERR(session))
1819 return PTR_ERR(session);
1820
1821 perf_stat.session = session;
1822 stat_config.output = stderr;
1823 evsel_list = session->evlist;
1824
1825 ret = perf_session__process_events(session);
1826 if (ret)
1827 return ret;
1828
1829 perf_session__delete(session);
1830 return 0;
1831 }
1832
1833 static void setup_system_wide(int forks)
1834 {
1835 /*
1836 * Make system wide (-a) the default target if
1837 * no target was specified and one of following
1838 * conditions is met:
1839 *
1840 * - there's no workload specified
1841 * - there is workload specified but all requested
1842 * events are system wide events
1843 */
1844 if (!target__none(&target))
1845 return;
1846
1847 if (!forks)
1848 target.system_wide = true;
1849 else {
1850 struct evsel *counter;
1851
1852 evlist__for_each_entry(evsel_list, counter) {
1853 if (!counter->core.system_wide)
1854 return;
1855 }
1856
1857 if (evsel_list->core.nr_entries)
1858 target.system_wide = true;
1859 }
1860 }
1861
1862 int cmd_stat(int argc, const char **argv)
1863 {
1864 const char * const stat_usage[] = {
1865 "perf stat [<options>] [<command>]",
1866 NULL
1867 };
1868 int status = -EINVAL, run_idx;
1869 const char *mode;
1870 FILE *output = stderr;
1871 unsigned int interval, timeout;
1872 const char * const stat_subcommands[] = { "record", "report" };
1873
1874 setlocale(LC_ALL, "");
1875
1876 evsel_list = evlist__new();
1877 if (evsel_list == NULL)
1878 return -ENOMEM;
1879
1880 parse_events__shrink_config_terms();
1881
1882 /* String-parsing callback-based options would segfault when negated */
1883 set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG);
1884 set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG);
1885 set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG);
1886
1887 argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
1888 (const char **) stat_usage,
1889 PARSE_OPT_STOP_AT_NON_OPTION);
1890 perf_stat__collect_metric_expr(evsel_list);
1891 perf_stat__init_shadow_stats();
1892
1893 if (stat_config.csv_sep) {
1894 stat_config.csv_output = true;
1895 if (!strcmp(stat_config.csv_sep, "\\t"))
1896 stat_config.csv_sep = "\t";
1897 } else
1898 stat_config.csv_sep = DEFAULT_SEPARATOR;
1899
1900 if (argc && !strncmp(argv[0], "rec", 3)) {
1901 argc = __cmd_record(argc, argv);
1902 if (argc < 0)
1903 return -1;
1904 } else if (argc && !strncmp(argv[0], "rep", 3))
1905 return __cmd_report(argc, argv);
1906
1907 interval = stat_config.interval;
1908 timeout = stat_config.timeout;
1909
1910 /*
1911 * For record command the -o is already taken care of.
1912 */
1913 if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
1914 output = NULL;
1915
1916 if (output_name && output_fd) {
1917 fprintf(stderr, "cannot use both --output and --log-fd\n");
1918 parse_options_usage(stat_usage, stat_options, "o", 1);
1919 parse_options_usage(NULL, stat_options, "log-fd", 0);
1920 goto out;
1921 }
1922
1923 if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) {
1924 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
1925 goto out;
1926 }
1927
1928 if (stat_config.metric_only && stat_config.run_count > 1) {
1929 fprintf(stderr, "--metric-only is not supported with -r\n");
1930 goto out;
1931 }
1932
1933 if (stat_config.walltime_run_table && stat_config.run_count <= 1) {
1934 fprintf(stderr, "--table is only supported with -r\n");
1935 parse_options_usage(stat_usage, stat_options, "r", 1);
1936 parse_options_usage(NULL, stat_options, "table", 0);
1937 goto out;
1938 }
1939
1940 if (output_fd < 0) {
1941 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1942 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
1943 goto out;
1944 }
1945
1946 if (!output) {
1947 struct timespec tm;
1948 mode = append_file ? "a" : "w";
1949
1950 output = fopen(output_name, mode);
1951 if (!output) {
1952 perror("failed to create output file");
1953 return -1;
1954 }
1955 clock_gettime(CLOCK_REALTIME, &tm);
1956 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1957 } else if (output_fd > 0) {
1958 mode = append_file ? "a" : "w";
1959 output = fdopen(output_fd, mode);
1960 if (!output) {
1961 perror("Failed opening logfd");
1962 return -errno;
1963 }
1964 }
1965
1966 stat_config.output = output;
1967
1968 /*
1969 * let the spreadsheet do the pretty-printing
1970 */
1971 if (stat_config.csv_output) {
1972 /* User explicitly passed -B? */
1973 if (big_num_opt == 1) {
1974 fprintf(stderr, "-B option not supported with -x\n");
1975 parse_options_usage(stat_usage, stat_options, "B", 1);
1976 parse_options_usage(NULL, stat_options, "x", 1);
1977 goto out;
1978 } else /* Nope, so disable big number formatting */
1979 stat_config.big_num = false;
1980 } else if (big_num_opt == 0) /* User passed --no-big-num */
1981 stat_config.big_num = false;
1982
1983 setup_system_wide(argc);
1984
1985 /*
1986 * Display user/system times only for single
1987 * run and when there's specified tracee.
1988 */
1989 if ((stat_config.run_count == 1) && target__none(&target))
1990 stat_config.ru_display = true;
1991
1992 if (stat_config.run_count < 0) {
1993 pr_err("Run count must be a positive number\n");
1994 parse_options_usage(stat_usage, stat_options, "r", 1);
1995 goto out;
1996 } else if (stat_config.run_count == 0) {
1997 forever = true;
1998 stat_config.run_count = 1;
1999 }
2000
2001 if (stat_config.walltime_run_table) {
2002 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0]));
2003 if (!stat_config.walltime_run) {
2004 pr_err("failed to setup -r option");
2005 goto out;
2006 }
2007 }
2008
2009 if ((stat_config.aggr_mode == AGGR_THREAD) &&
2010 !target__has_task(&target)) {
2011 if (!target.system_wide || target.cpu_list) {
2012 fprintf(stderr, "The --per-thread option is only "
2013 "available when monitoring via -p -t -a "
2014 "options or only --per-thread.\n");
2015 parse_options_usage(NULL, stat_options, "p", 1);
2016 parse_options_usage(NULL, stat_options, "t", 1);
2017 goto out;
2018 }
2019 }
2020
2021 /*
2022 * no_aggr, cgroup are for system-wide only
2023 * --per-thread is aggregated per thread, we dont mix it with cpu mode
2024 */
2025 if (((stat_config.aggr_mode != AGGR_GLOBAL &&
2026 stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
2027 !target__has_cpu(&target)) {
2028 fprintf(stderr, "both cgroup and no-aggregation "
2029 "modes only available in system-wide mode\n");
2030
2031 parse_options_usage(stat_usage, stat_options, "G", 1);
2032 parse_options_usage(NULL, stat_options, "A", 1);
2033 parse_options_usage(NULL, stat_options, "a", 1);
2034 goto out;
2035 }
2036
2037 if (add_default_attributes())
2038 goto out;
2039
2040 target__validate(&target);
2041
2042 if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
2043 target.per_thread = true;
2044
2045 if (perf_evlist__create_maps(evsel_list, &target) < 0) {
2046 if (target__has_task(&target)) {
2047 pr_err("Problems finding threads of monitor\n");
2048 parse_options_usage(stat_usage, stat_options, "p", 1);
2049 parse_options_usage(NULL, stat_options, "t", 1);
2050 } else if (target__has_cpu(&target)) {
2051 perror("failed to parse CPUs map");
2052 parse_options_usage(stat_usage, stat_options, "C", 1);
2053 parse_options_usage(NULL, stat_options, "a", 1);
2054 }
2055 goto out;
2056 }
2057
2058 /*
2059 * Initialize thread_map with comm names,
2060 * so we could print it out on output.
2061 */
2062 if (stat_config.aggr_mode == AGGR_THREAD) {
2063 thread_map__read_comms(evsel_list->core.threads);
2064 if (target.system_wide) {
2065 if (runtime_stat_new(&stat_config,
2066 perf_thread_map__nr(evsel_list->core.threads))) {
2067 goto out;
2068 }
2069 }
2070 }
2071
2072 if (stat_config.aggr_mode == AGGR_NODE)
2073 cpu__setup_cpunode_map();
2074
2075 if (stat_config.times && interval)
2076 interval_count = true;
2077 else if (stat_config.times && !interval) {
2078 pr_err("interval-count option should be used together with "
2079 "interval-print.\n");
2080 parse_options_usage(stat_usage, stat_options, "interval-count", 0);
2081 parse_options_usage(stat_usage, stat_options, "I", 1);
2082 goto out;
2083 }
2084
2085 if (timeout && timeout < 100) {
2086 if (timeout < 10) {
2087 pr_err("timeout must be >= 10ms.\n");
2088 parse_options_usage(stat_usage, stat_options, "timeout", 0);
2089 goto out;
2090 } else
2091 pr_warning("timeout < 100ms. "
2092 "The overhead percentage could be high in some cases. "
2093 "Please proceed with caution.\n");
2094 }
2095 if (timeout && interval) {
2096 pr_err("timeout option is not supported with interval-print.\n");
2097 parse_options_usage(stat_usage, stat_options, "timeout", 0);
2098 parse_options_usage(stat_usage, stat_options, "I", 1);
2099 goto out;
2100 }
2101
2102 if (perf_evlist__alloc_stats(evsel_list, interval))
2103 goto out;
2104
2105 if (perf_stat_init_aggr_mode())
2106 goto out;
2107
2108 /*
2109 * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
2110 * while avoiding that older tools show confusing messages.
2111 *
2112 * However for pipe sessions we need to keep it zero,
2113 * because script's perf_evsel__check_attr is triggered
2114 * by attr->sample_type != 0, and we can't run it on
2115 * stat sessions.
2116 */
2117 stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe);
2118
2119 /*
2120 * We dont want to block the signals - that would cause
2121 * child tasks to inherit that and Ctrl-C would not work.
2122 * What we want is for Ctrl-C to work in the exec()-ed
2123 * task, but being ignored by perf stat itself:
2124 */
2125 atexit(sig_atexit);
2126 if (!forever)
2127 signal(SIGINT, skip_signal);
2128 signal(SIGCHLD, skip_signal);
2129 signal(SIGALRM, skip_signal);
2130 signal(SIGABRT, skip_signal);
2131
2132 status = 0;
2133 for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) {
2134 if (stat_config.run_count != 1 && verbose > 0)
2135 fprintf(output, "[ perf stat: executing run #%d ... ]\n",
2136 run_idx + 1);
2137
2138 if (run_idx != 0)
2139 perf_evlist__reset_prev_raw_counts(evsel_list);
2140
2141 status = run_perf_stat(argc, argv, run_idx);
2142 if (forever && status != -1 && !interval) {
2143 print_counters(NULL, argc, argv);
2144 perf_stat__reset_stats();
2145 }
2146 }
2147
2148 if (!forever && status != -1 && !interval)
2149 print_counters(NULL, argc, argv);
2150
2151 if (STAT_RECORD) {
2152 /*
2153 * We synthesize the kernel mmap record just so that older tools
2154 * don't emit warnings about not being able to resolve symbols
2155 * due to /proc/sys/kernel/kptr_restrict settings and instear provide
2156 * a saner message about no samples being in the perf.data file.
2157 *
2158 * This also serves to suppress a warning about f_header.data.size == 0
2159 * in header.c at the moment 'perf stat record' gets introduced, which
2160 * is not really needed once we start adding the stat specific PERF_RECORD_
2161 * records, but the need to suppress the kptr_restrict messages in older
2162 * tools remain -acme
2163 */
2164 int fd = perf_data__fd(&perf_stat.data);
2165 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
2166 process_synthesized_event,
2167 &perf_stat.session->machines.host);
2168 if (err) {
2169 pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
2170 "older tools may produce warnings about this file\n.");
2171 }
2172
2173 if (!interval) {
2174 if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
2175 pr_err("failed to write stat round event\n");
2176 }
2177
2178 if (!perf_stat.data.is_pipe) {
2179 perf_stat.session->header.data_size += perf_stat.bytes_written;
2180 perf_session__write_header(perf_stat.session, evsel_list, fd, true);
2181 }
2182
2183 evlist__close(evsel_list);
2184 perf_session__delete(perf_stat.session);
2185 }
2186
2187 perf_stat__exit_aggr_mode();
2188 perf_evlist__free_stats(evsel_list);
2189 out:
2190 zfree(&stat_config.walltime_run);
2191
2192 if (smi_cost && smi_reset)
2193 sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
2194
2195 evlist__delete(evsel_list);
2196
2197 runtime_stat_delete(&stat_config);
2198
2199 return status;
2200 }
Linux with added FPC-III support