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1/*
2 * builtin-stat.c
3 *
4 * Builtin stat command: Give a precise performance counters summary
5 * overview about any workload, CPU or specific PID.
6 *
7 * Sample output:
8
9 $ perf stat ./hackbench 10
10
11 Time: 0.118
12
13 Performance counter stats for './hackbench 10':
14
15 1708.761321 task-clock # 11.037 CPUs utilized
16 41,190 context-switches # 0.024 M/sec
17 6,735 CPU-migrations # 0.004 M/sec
18 17,318 page-faults # 0.010 M/sec
19 5,205,202,243 cycles # 3.046 GHz
20 3,856,436,920 stalled-cycles-frontend # 74.09% frontend cycles idle
21 1,600,790,871 stalled-cycles-backend # 30.75% backend cycles idle
22 2,603,501,247 instructions # 0.50 insns per cycle
23 # 1.48 stalled cycles per insn
24 484,357,498 branches # 283.455 M/sec
25 6,388,934 branch-misses # 1.32% of all branches
26
27 0.154822978 seconds time elapsed
28
29 *
30 * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
31 *
32 * Improvements and fixes by:
33 *
34 * Arjan van de Ven <arjan@linux.intel.com>
35 * Yanmin Zhang <yanmin.zhang@intel.com>
36 * Wu Fengguang <fengguang.wu@intel.com>
37 * Mike Galbraith <efault@gmx.de>
38 * Paul Mackerras <paulus@samba.org>
39 * Jaswinder Singh Rajput <jaswinder@kernel.org>
40 *
41 * Released under the GPL v2. (and only v2, not any later version)
42 */
43
44#include "perf.h"
45#include "builtin.h"
46#include "util/util.h"
47#include "util/parse-options.h"
48#include "util/parse-events.h"
49#include "util/pmu.h"
50#include "util/event.h"
51#include "util/evlist.h"
52#include "util/evsel.h"
53#include "util/debug.h"
54#include "util/color.h"
55#include "util/stat.h"
56#include "util/header.h"
57#include "util/cpumap.h"
58#include "util/thread.h"
59#include "util/thread_map.h"
60
61#include <stdlib.h>
62#include <sys/prctl.h>
63#include <locale.h>
64
65#define DEFAULT_SEPARATOR " "
66#define CNTR_NOT_SUPPORTED "<not supported>"
67#define CNTR_NOT_COUNTED "<not counted>"
68
69static void print_stat(int argc, const char **argv);
70static void print_counter_aggr(struct perf_evsel *counter, char *prefix);
71static void print_counter(struct perf_evsel *counter, char *prefix);
72static void print_aggr(char *prefix);
73
74/* Default events used for perf stat -T */
75static const char * const transaction_attrs[] = {
76 "task-clock",
77 "{"
78 "instructions,"
79 "cycles,"
80 "cpu/cycles-t/,"
81 "cpu/tx-start/,"
82 "cpu/el-start/,"
83 "cpu/cycles-ct/"
84 "}"
85};
86
87/* More limited version when the CPU does not have all events. */
88static const char * const transaction_limited_attrs[] = {
89 "task-clock",
90 "{"
91 "instructions,"
92 "cycles,"
93 "cpu/cycles-t/,"
94 "cpu/tx-start/"
95 "}"
96};
97
98/* must match transaction_attrs and the beginning limited_attrs */
99enum {
100 T_TASK_CLOCK,
101 T_INSTRUCTIONS,
102 T_CYCLES,
103 T_CYCLES_IN_TX,
104 T_TRANSACTION_START,
105 T_ELISION_START,
106 T_CYCLES_IN_TX_CP,
107};
108
109static struct perf_evlist *evsel_list;
110
111static struct target target = {
112 .uid = UINT_MAX,
113};
114
115enum aggr_mode {
116 AGGR_NONE,
117 AGGR_GLOBAL,
118 AGGR_SOCKET,
119 AGGR_CORE,
120};
121
122static int run_count = 1;
123static bool no_inherit = false;
124static bool scale = true;
125static enum aggr_mode aggr_mode = AGGR_GLOBAL;
126static volatile pid_t child_pid = -1;
127static bool null_run = false;
128static int detailed_run = 0;
129static bool transaction_run;
130static bool big_num = true;
131static int big_num_opt = -1;
132static const char *csv_sep = NULL;
133static bool csv_output = false;
134static bool group = false;
135static FILE *output = NULL;
136static const char *pre_cmd = NULL;
137static const char *post_cmd = NULL;
138static bool sync_run = false;
139static unsigned int interval = 0;
140static unsigned int initial_delay = 0;
141static unsigned int unit_width = 4; /* strlen("unit") */
142static bool forever = false;
143static struct timespec ref_time;
144static struct cpu_map *aggr_map;
145static int (*aggr_get_id)(struct cpu_map *m, int cpu);
146
147static volatile int done = 0;
148
149struct perf_stat {
150 struct stats res_stats[3];
151};
152
153static inline void diff_timespec(struct timespec *r, struct timespec *a,
154 struct timespec *b)
155{
156 r->tv_sec = a->tv_sec - b->tv_sec;
157 if (a->tv_nsec < b->tv_nsec) {
158 r->tv_nsec = a->tv_nsec + 1000000000L - b->tv_nsec;
159 r->tv_sec--;
160 } else {
161 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
162 }
163}
164
165static inline struct cpu_map *perf_evsel__cpus(struct perf_evsel *evsel)
166{
167 return (evsel->cpus && !target.cpu_list) ? evsel->cpus : evsel_list->cpus;
168}
169
170static inline int perf_evsel__nr_cpus(struct perf_evsel *evsel)
171{
172 return perf_evsel__cpus(evsel)->nr;
173}
174
175static void perf_evsel__reset_stat_priv(struct perf_evsel *evsel)
176{
177 int i;
178 struct perf_stat *ps = evsel->priv;
179
180 for (i = 0; i < 3; i++)
181 init_stats(&ps->res_stats[i]);
182}
183
184static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
185{
186 evsel->priv = zalloc(sizeof(struct perf_stat));
187 if (evsel == NULL)
188 return -ENOMEM;
189 perf_evsel__reset_stat_priv(evsel);
190 return 0;
191}
192
193static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
194{
195 zfree(&evsel->priv);
196}
197
198static int perf_evsel__alloc_prev_raw_counts(struct perf_evsel *evsel)
199{
200 void *addr;
201 size_t sz;
202
203 sz = sizeof(*evsel->counts) +
204 (perf_evsel__nr_cpus(evsel) * sizeof(struct perf_counts_values));
205
206 addr = zalloc(sz);
207 if (!addr)
208 return -ENOMEM;
209
210 evsel->prev_raw_counts = addr;
211
212 return 0;
213}
214
215static void perf_evsel__free_prev_raw_counts(struct perf_evsel *evsel)
216{
217 zfree(&evsel->prev_raw_counts);
218}
219
220static void perf_evlist__free_stats(struct perf_evlist *evlist)
221{
222 struct perf_evsel *evsel;
223
224 evlist__for_each(evlist, evsel) {
225 perf_evsel__free_stat_priv(evsel);
226 perf_evsel__free_counts(evsel);
227 perf_evsel__free_prev_raw_counts(evsel);
228 }
229}
230
231static int perf_evlist__alloc_stats(struct perf_evlist *evlist, bool alloc_raw)
232{
233 struct perf_evsel *evsel;
234
235 evlist__for_each(evlist, evsel) {
236 if (perf_evsel__alloc_stat_priv(evsel) < 0 ||
237 perf_evsel__alloc_counts(evsel, perf_evsel__nr_cpus(evsel)) < 0 ||
238 (alloc_raw && perf_evsel__alloc_prev_raw_counts(evsel) < 0))
239 goto out_free;
240 }
241
242 return 0;
243
244out_free:
245 perf_evlist__free_stats(evlist);
246 return -1;
247}
248
249static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
250static struct stats runtime_cycles_stats[MAX_NR_CPUS];
251static struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
252static struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
253static struct stats runtime_branches_stats[MAX_NR_CPUS];
254static struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
255static struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
256static struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
257static struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
258static struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
259static struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
260static struct stats runtime_cycles_in_tx_stats[MAX_NR_CPUS];
261static struct stats walltime_nsecs_stats;
262static struct stats runtime_transaction_stats[MAX_NR_CPUS];
263static struct stats runtime_elision_stats[MAX_NR_CPUS];
264
265static void perf_stat__reset_stats(struct perf_evlist *evlist)
266{
267 struct perf_evsel *evsel;
268
269 evlist__for_each(evlist, evsel) {
270 perf_evsel__reset_stat_priv(evsel);
271 perf_evsel__reset_counts(evsel, perf_evsel__nr_cpus(evsel));
272 }
273
274 memset(runtime_nsecs_stats, 0, sizeof(runtime_nsecs_stats));
275 memset(runtime_cycles_stats, 0, sizeof(runtime_cycles_stats));
276 memset(runtime_stalled_cycles_front_stats, 0, sizeof(runtime_stalled_cycles_front_stats));
277 memset(runtime_stalled_cycles_back_stats, 0, sizeof(runtime_stalled_cycles_back_stats));
278 memset(runtime_branches_stats, 0, sizeof(runtime_branches_stats));
279 memset(runtime_cacherefs_stats, 0, sizeof(runtime_cacherefs_stats));
280 memset(runtime_l1_dcache_stats, 0, sizeof(runtime_l1_dcache_stats));
281 memset(runtime_l1_icache_stats, 0, sizeof(runtime_l1_icache_stats));
282 memset(runtime_ll_cache_stats, 0, sizeof(runtime_ll_cache_stats));
283 memset(runtime_itlb_cache_stats, 0, sizeof(runtime_itlb_cache_stats));
284 memset(runtime_dtlb_cache_stats, 0, sizeof(runtime_dtlb_cache_stats));
285 memset(runtime_cycles_in_tx_stats, 0,
286 sizeof(runtime_cycles_in_tx_stats));
287 memset(runtime_transaction_stats, 0,
288 sizeof(runtime_transaction_stats));
289 memset(runtime_elision_stats, 0, sizeof(runtime_elision_stats));
290 memset(&walltime_nsecs_stats, 0, sizeof(walltime_nsecs_stats));
291}
292
293static int create_perf_stat_counter(struct perf_evsel *evsel)
294{
295 struct perf_event_attr *attr = &evsel->attr;
296
297 if (scale)
298 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
299 PERF_FORMAT_TOTAL_TIME_RUNNING;
300
301 attr->inherit = !no_inherit;
302
303 if (target__has_cpu(&target))
304 return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
305
306 if (!target__has_task(&target) && perf_evsel__is_group_leader(evsel)) {
307 attr->disabled = 1;
308 if (!initial_delay)
309 attr->enable_on_exec = 1;
310 }
311
312 return perf_evsel__open_per_thread(evsel, evsel_list->threads);
313}
314
315/*
316 * Does the counter have nsecs as a unit?
317 */
318static inline int nsec_counter(struct perf_evsel *evsel)
319{
320 if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
321 perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
322 return 1;
323
324 return 0;
325}
326
327static struct perf_evsel *nth_evsel(int n)
328{
329 static struct perf_evsel **array;
330 static int array_len;
331 struct perf_evsel *ev;
332 int j;
333
334 /* Assumes this only called when evsel_list does not change anymore. */
335 if (!array) {
336 evlist__for_each(evsel_list, ev)
337 array_len++;
338 array = malloc(array_len * sizeof(void *));
339 if (!array)
340 exit(ENOMEM);
341 j = 0;
342 evlist__for_each(evsel_list, ev)
343 array[j++] = ev;
344 }
345 if (n < array_len)
346 return array[n];
347 return NULL;
348}
349
350/*
351 * Update various tracking values we maintain to print
352 * more semantic information such as miss/hit ratios,
353 * instruction rates, etc:
354 */
355static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
356{
357 if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
358 update_stats(&runtime_nsecs_stats[0], count[0]);
359 else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
360 update_stats(&runtime_cycles_stats[0], count[0]);
361 else if (transaction_run &&
362 perf_evsel__cmp(counter, nth_evsel(T_CYCLES_IN_TX)))
363 update_stats(&runtime_cycles_in_tx_stats[0], count[0]);
364 else if (transaction_run &&
365 perf_evsel__cmp(counter, nth_evsel(T_TRANSACTION_START)))
366 update_stats(&runtime_transaction_stats[0], count[0]);
367 else if (transaction_run &&
368 perf_evsel__cmp(counter, nth_evsel(T_ELISION_START)))
369 update_stats(&runtime_elision_stats[0], count[0]);
370 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
371 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
372 else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
373 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
374 else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
375 update_stats(&runtime_branches_stats[0], count[0]);
376 else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
377 update_stats(&runtime_cacherefs_stats[0], count[0]);
378 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
379 update_stats(&runtime_l1_dcache_stats[0], count[0]);
380 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
381 update_stats(&runtime_l1_icache_stats[0], count[0]);
382 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
383 update_stats(&runtime_ll_cache_stats[0], count[0]);
384 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
385 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
386 else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
387 update_stats(&runtime_itlb_cache_stats[0], count[0]);
388}
389
390/*
391 * Read out the results of a single counter:
392 * aggregate counts across CPUs in system-wide mode
393 */
394static int read_counter_aggr(struct perf_evsel *counter)
395{
396 struct perf_stat *ps = counter->priv;
397 u64 *count = counter->counts->aggr.values;
398 int i;
399
400 if (__perf_evsel__read(counter, perf_evsel__nr_cpus(counter),
401 thread_map__nr(evsel_list->threads), scale) < 0)
402 return -1;
403
404 for (i = 0; i < 3; i++)
405 update_stats(&ps->res_stats[i], count[i]);
406
407 if (verbose) {
408 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
409 perf_evsel__name(counter), count[0], count[1], count[2]);
410 }
411
412 /*
413 * Save the full runtime - to allow normalization during printout:
414 */
415 update_shadow_stats(counter, count);
416
417 return 0;
418}
419
420/*
421 * Read out the results of a single counter:
422 * do not aggregate counts across CPUs in system-wide mode
423 */
424static int read_counter(struct perf_evsel *counter)
425{
426 u64 *count;
427 int cpu;
428
429 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
430 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
431 return -1;
432
433 count = counter->counts->cpu[cpu].values;
434
435 update_shadow_stats(counter, count);
436 }
437
438 return 0;
439}
440
441static void print_interval(void)
442{
443 static int num_print_interval;
444 struct perf_evsel *counter;
445 struct perf_stat *ps;
446 struct timespec ts, rs;
447 char prefix[64];
448
449 if (aggr_mode == AGGR_GLOBAL) {
450 evlist__for_each(evsel_list, counter) {
451 ps = counter->priv;
452 memset(ps->res_stats, 0, sizeof(ps->res_stats));
453 read_counter_aggr(counter);
454 }
455 } else {
456 evlist__for_each(evsel_list, counter) {
457 ps = counter->priv;
458 memset(ps->res_stats, 0, sizeof(ps->res_stats));
459 read_counter(counter);
460 }
461 }
462
463 clock_gettime(CLOCK_MONOTONIC, &ts);
464 diff_timespec(&rs, &ts, &ref_time);
465 sprintf(prefix, "%6lu.%09lu%s", rs.tv_sec, rs.tv_nsec, csv_sep);
466
467 if (num_print_interval == 0 && !csv_output) {
468 switch (aggr_mode) {
469 case AGGR_SOCKET:
470 fprintf(output, "# time socket cpus counts %*s events\n", unit_width, "unit");
471 break;
472 case AGGR_CORE:
473 fprintf(output, "# time core cpus counts %*s events\n", unit_width, "unit");
474 break;
475 case AGGR_NONE:
476 fprintf(output, "# time CPU counts %*s events\n", unit_width, "unit");
477 break;
478 case AGGR_GLOBAL:
479 default:
480 fprintf(output, "# time counts %*s events\n", unit_width, "unit");
481 }
482 }
483
484 if (++num_print_interval == 25)
485 num_print_interval = 0;
486
487 switch (aggr_mode) {
488 case AGGR_CORE:
489 case AGGR_SOCKET:
490 print_aggr(prefix);
491 break;
492 case AGGR_NONE:
493 evlist__for_each(evsel_list, counter)
494 print_counter(counter, prefix);
495 break;
496 case AGGR_GLOBAL:
497 default:
498 evlist__for_each(evsel_list, counter)
499 print_counter_aggr(counter, prefix);
500 }
501
502 fflush(output);
503}
504
505static void handle_initial_delay(void)
506{
507 struct perf_evsel *counter;
508
509 if (initial_delay) {
510 const int ncpus = cpu_map__nr(evsel_list->cpus),
511 nthreads = thread_map__nr(evsel_list->threads);
512
513 usleep(initial_delay * 1000);
514 evlist__for_each(evsel_list, counter)
515 perf_evsel__enable(counter, ncpus, nthreads);
516 }
517}
518
519static volatile int workload_exec_errno;
520
521/*
522 * perf_evlist__prepare_workload will send a SIGUSR1
523 * if the fork fails, since we asked by setting its
524 * want_signal to true.
525 */
526static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
527 void *ucontext __maybe_unused)
528{
529 workload_exec_errno = info->si_value.sival_int;
530}
531
532static int __run_perf_stat(int argc, const char **argv)
533{
534 char msg[512];
535 unsigned long long t0, t1;
536 struct perf_evsel *counter;
537 struct timespec ts;
538 size_t l;
539 int status = 0;
540 const bool forks = (argc > 0);
541
542 if (interval) {
543 ts.tv_sec = interval / 1000;
544 ts.tv_nsec = (interval % 1000) * 1000000;
545 } else {
546 ts.tv_sec = 1;
547 ts.tv_nsec = 0;
548 }
549
550 if (forks) {
551 if (perf_evlist__prepare_workload(evsel_list, &target, argv, false,
552 workload_exec_failed_signal) < 0) {
553 perror("failed to prepare workload");
554 return -1;
555 }
556 child_pid = evsel_list->workload.pid;
557 }
558
559 if (group)
560 perf_evlist__set_leader(evsel_list);
561
562 evlist__for_each(evsel_list, counter) {
563 if (create_perf_stat_counter(counter) < 0) {
564 /*
565 * PPC returns ENXIO for HW counters until 2.6.37
566 * (behavior changed with commit b0a873e).
567 */
568 if (errno == EINVAL || errno == ENOSYS ||
569 errno == ENOENT || errno == EOPNOTSUPP ||
570 errno == ENXIO) {
571 if (verbose)
572 ui__warning("%s event is not supported by the kernel.\n",
573 perf_evsel__name(counter));
574 counter->supported = false;
575 continue;
576 }
577
578 perf_evsel__open_strerror(counter, &target,
579 errno, msg, sizeof(msg));
580 ui__error("%s\n", msg);
581
582 if (child_pid != -1)
583 kill(child_pid, SIGTERM);
584
585 return -1;
586 }
587 counter->supported = true;
588
589 l = strlen(counter->unit);
590 if (l > unit_width)
591 unit_width = l;
592 }
593
594 if (perf_evlist__apply_filters(evsel_list)) {
595 error("failed to set filter with %d (%s)\n", errno,
596 strerror(errno));
597 return -1;
598 }
599
600 /*
601 * Enable counters and exec the command:
602 */
603 t0 = rdclock();
604 clock_gettime(CLOCK_MONOTONIC, &ref_time);
605
606 if (forks) {
607 perf_evlist__start_workload(evsel_list);
608 handle_initial_delay();
609
610 if (interval) {
611 while (!waitpid(child_pid, &status, WNOHANG)) {
612 nanosleep(&ts, NULL);
613 print_interval();
614 }
615 }
616 wait(&status);
617
618 if (workload_exec_errno) {
619 const char *emsg = strerror_r(workload_exec_errno, msg, sizeof(msg));
620 pr_err("Workload failed: %s\n", emsg);
621 return -1;
622 }
623
624 if (WIFSIGNALED(status))
625 psignal(WTERMSIG(status), argv[0]);
626 } else {
627 handle_initial_delay();
628 while (!done) {
629 nanosleep(&ts, NULL);
630 if (interval)
631 print_interval();
632 }
633 }
634
635 t1 = rdclock();
636
637 update_stats(&walltime_nsecs_stats, t1 - t0);
638
639 if (aggr_mode == AGGR_GLOBAL) {
640 evlist__for_each(evsel_list, counter) {
641 read_counter_aggr(counter);
642 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
643 thread_map__nr(evsel_list->threads));
644 }
645 } else {
646 evlist__for_each(evsel_list, counter) {
647 read_counter(counter);
648 perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
649 }
650 }
651
652 return WEXITSTATUS(status);
653}
654
655static int run_perf_stat(int argc, const char **argv)
656{
657 int ret;
658
659 if (pre_cmd) {
660 ret = system(pre_cmd);
661 if (ret)
662 return ret;
663 }
664
665 if (sync_run)
666 sync();
667
668 ret = __run_perf_stat(argc, argv);
669 if (ret)
670 return ret;
671
672 if (post_cmd) {
673 ret = system(post_cmd);
674 if (ret)
675 return ret;
676 }
677
678 return ret;
679}
680
681static void print_noise_pct(double total, double avg)
682{
683 double pct = rel_stddev_stats(total, avg);
684
685 if (csv_output)
686 fprintf(output, "%s%.2f%%", csv_sep, pct);
687 else if (pct)
688 fprintf(output, " ( +-%6.2f%% )", pct);
689}
690
691static void print_noise(struct perf_evsel *evsel, double avg)
692{
693 struct perf_stat *ps;
694
695 if (run_count == 1)
696 return;
697
698 ps = evsel->priv;
699 print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
700}
701
702static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
703{
704 switch (aggr_mode) {
705 case AGGR_CORE:
706 fprintf(output, "S%d-C%*d%s%*d%s",
707 cpu_map__id_to_socket(id),
708 csv_output ? 0 : -8,
709 cpu_map__id_to_cpu(id),
710 csv_sep,
711 csv_output ? 0 : 4,
712 nr,
713 csv_sep);
714 break;
715 case AGGR_SOCKET:
716 fprintf(output, "S%*d%s%*d%s",
717 csv_output ? 0 : -5,
718 id,
719 csv_sep,
720 csv_output ? 0 : 4,
721 nr,
722 csv_sep);
723 break;
724 case AGGR_NONE:
725 fprintf(output, "CPU%*d%s",
726 csv_output ? 0 : -4,
727 perf_evsel__cpus(evsel)->map[id], csv_sep);
728 break;
729 case AGGR_GLOBAL:
730 default:
731 break;
732 }
733}
734
735static void nsec_printout(int cpu, int nr, struct perf_evsel *evsel, double avg)
736{
737 double msecs = avg / 1e6;
738 const char *fmt_v, *fmt_n;
739 char name[25];
740
741 fmt_v = csv_output ? "%.6f%s" : "%18.6f%s";
742 fmt_n = csv_output ? "%s" : "%-25s";
743
744 aggr_printout(evsel, cpu, nr);
745
746 scnprintf(name, sizeof(name), "%s%s",
747 perf_evsel__name(evsel), csv_output ? "" : " (msec)");
748
749 fprintf(output, fmt_v, msecs, csv_sep);
750
751 if (csv_output)
752 fprintf(output, "%s%s", evsel->unit, csv_sep);
753 else
754 fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep);
755
756 fprintf(output, fmt_n, name);
757
758 if (evsel->cgrp)
759 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
760
761 if (csv_output || interval)
762 return;
763
764 if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
765 fprintf(output, " # %8.3f CPUs utilized ",
766 avg / avg_stats(&walltime_nsecs_stats));
767 else
768 fprintf(output, " ");
769}
770
771/* used for get_ratio_color() */
772enum grc_type {
773 GRC_STALLED_CYCLES_FE,
774 GRC_STALLED_CYCLES_BE,
775 GRC_CACHE_MISSES,
776 GRC_MAX_NR
777};
778
779static const char *get_ratio_color(enum grc_type type, double ratio)
780{
781 static const double grc_table[GRC_MAX_NR][3] = {
782 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
783 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
784 [GRC_CACHE_MISSES] = { 20.0, 10.0, 5.0 },
785 };
786 const char *color = PERF_COLOR_NORMAL;
787
788 if (ratio > grc_table[type][0])
789 color = PERF_COLOR_RED;
790 else if (ratio > grc_table[type][1])
791 color = PERF_COLOR_MAGENTA;
792 else if (ratio > grc_table[type][2])
793 color = PERF_COLOR_YELLOW;
794
795 return color;
796}
797
798static void print_stalled_cycles_frontend(int cpu,
799 struct perf_evsel *evsel
800 __maybe_unused, double avg)
801{
802 double total, ratio = 0.0;
803 const char *color;
804
805 total = avg_stats(&runtime_cycles_stats[cpu]);
806
807 if (total)
808 ratio = avg / total * 100.0;
809
810 color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
811
812 fprintf(output, " # ");
813 color_fprintf(output, color, "%6.2f%%", ratio);
814 fprintf(output, " frontend cycles idle ");
815}
816
817static void print_stalled_cycles_backend(int cpu,
818 struct perf_evsel *evsel
819 __maybe_unused, double avg)
820{
821 double total, ratio = 0.0;
822 const char *color;
823
824 total = avg_stats(&runtime_cycles_stats[cpu]);
825
826 if (total)
827 ratio = avg / total * 100.0;
828
829 color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
830
831 fprintf(output, " # ");
832 color_fprintf(output, color, "%6.2f%%", ratio);
833 fprintf(output, " backend cycles idle ");
834}
835
836static void print_branch_misses(int cpu,
837 struct perf_evsel *evsel __maybe_unused,
838 double avg)
839{
840 double total, ratio = 0.0;
841 const char *color;
842
843 total = avg_stats(&runtime_branches_stats[cpu]);
844
845 if (total)
846 ratio = avg / total * 100.0;
847
848 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
849
850 fprintf(output, " # ");
851 color_fprintf(output, color, "%6.2f%%", ratio);
852 fprintf(output, " of all branches ");
853}
854
855static void print_l1_dcache_misses(int cpu,
856 struct perf_evsel *evsel __maybe_unused,
857 double avg)
858{
859 double total, ratio = 0.0;
860 const char *color;
861
862 total = avg_stats(&runtime_l1_dcache_stats[cpu]);
863
864 if (total)
865 ratio = avg / total * 100.0;
866
867 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
868
869 fprintf(output, " # ");
870 color_fprintf(output, color, "%6.2f%%", ratio);
871 fprintf(output, " of all L1-dcache hits ");
872}
873
874static void print_l1_icache_misses(int cpu,
875 struct perf_evsel *evsel __maybe_unused,
876 double avg)
877{
878 double total, ratio = 0.0;
879 const char *color;
880
881 total = avg_stats(&runtime_l1_icache_stats[cpu]);
882
883 if (total)
884 ratio = avg / total * 100.0;
885
886 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
887
888 fprintf(output, " # ");
889 color_fprintf(output, color, "%6.2f%%", ratio);
890 fprintf(output, " of all L1-icache hits ");
891}
892
893static void print_dtlb_cache_misses(int cpu,
894 struct perf_evsel *evsel __maybe_unused,
895 double avg)
896{
897 double total, ratio = 0.0;
898 const char *color;
899
900 total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
901
902 if (total)
903 ratio = avg / total * 100.0;
904
905 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
906
907 fprintf(output, " # ");
908 color_fprintf(output, color, "%6.2f%%", ratio);
909 fprintf(output, " of all dTLB cache hits ");
910}
911
912static void print_itlb_cache_misses(int cpu,
913 struct perf_evsel *evsel __maybe_unused,
914 double avg)
915{
916 double total, ratio = 0.0;
917 const char *color;
918
919 total = avg_stats(&runtime_itlb_cache_stats[cpu]);
920
921 if (total)
922 ratio = avg / total * 100.0;
923
924 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
925
926 fprintf(output, " # ");
927 color_fprintf(output, color, "%6.2f%%", ratio);
928 fprintf(output, " of all iTLB cache hits ");
929}
930
931static void print_ll_cache_misses(int cpu,
932 struct perf_evsel *evsel __maybe_unused,
933 double avg)
934{
935 double total, ratio = 0.0;
936 const char *color;
937
938 total = avg_stats(&runtime_ll_cache_stats[cpu]);
939
940 if (total)
941 ratio = avg / total * 100.0;
942
943 color = get_ratio_color(GRC_CACHE_MISSES, ratio);
944
945 fprintf(output, " # ");
946 color_fprintf(output, color, "%6.2f%%", ratio);
947 fprintf(output, " of all LL-cache hits ");
948}
949
950static void abs_printout(int cpu, int nr, struct perf_evsel *evsel, double avg)
951{
952 double total, ratio = 0.0, total2;
953 double sc = evsel->scale;
954 const char *fmt;
955
956 if (csv_output) {
957 fmt = sc != 1.0 ? "%.2f%s" : "%.0f%s";
958 } else {
959 if (big_num)
960 fmt = sc != 1.0 ? "%'18.2f%s" : "%'18.0f%s";
961 else
962 fmt = sc != 1.0 ? "%18.2f%s" : "%18.0f%s";
963 }
964
965 aggr_printout(evsel, cpu, nr);
966
967 if (aggr_mode == AGGR_GLOBAL)
968 cpu = 0;
969
970 fprintf(output, fmt, avg, csv_sep);
971
972 if (evsel->unit)
973 fprintf(output, "%-*s%s",
974 csv_output ? 0 : unit_width,
975 evsel->unit, csv_sep);
976
977 fprintf(output, "%-*s", csv_output ? 0 : 25, perf_evsel__name(evsel));
978
979 if (evsel->cgrp)
980 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
981
982 if (csv_output || interval)
983 return;
984
985 if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
986 total = avg_stats(&runtime_cycles_stats[cpu]);
987 if (total) {
988 ratio = avg / total;
989 fprintf(output, " # %5.2f insns per cycle ", ratio);
990 }
991 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
992 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
993
994 if (total && avg) {
995 ratio = total / avg;
996 fprintf(output, "\n");
997 if (aggr_mode == AGGR_NONE)
998 fprintf(output, " ");
999 fprintf(output, " # %5.2f stalled cycles per insn", ratio);
1000 }
1001
1002 } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
1003 runtime_branches_stats[cpu].n != 0) {
1004 print_branch_misses(cpu, evsel, avg);
1005 } else if (
1006 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1007 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1D |
1008 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1009 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1010 runtime_l1_dcache_stats[cpu].n != 0) {
1011 print_l1_dcache_misses(cpu, evsel, avg);
1012 } else if (
1013 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1014 evsel->attr.config == ( PERF_COUNT_HW_CACHE_L1I |
1015 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1016 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1017 runtime_l1_icache_stats[cpu].n != 0) {
1018 print_l1_icache_misses(cpu, evsel, avg);
1019 } else if (
1020 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1021 evsel->attr.config == ( PERF_COUNT_HW_CACHE_DTLB |
1022 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1023 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1024 runtime_dtlb_cache_stats[cpu].n != 0) {
1025 print_dtlb_cache_misses(cpu, evsel, avg);
1026 } else if (
1027 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1028 evsel->attr.config == ( PERF_COUNT_HW_CACHE_ITLB |
1029 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1030 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1031 runtime_itlb_cache_stats[cpu].n != 0) {
1032 print_itlb_cache_misses(cpu, evsel, avg);
1033 } else if (
1034 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1035 evsel->attr.config == ( PERF_COUNT_HW_CACHE_LL |
1036 ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1037 ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1038 runtime_ll_cache_stats[cpu].n != 0) {
1039 print_ll_cache_misses(cpu, evsel, avg);
1040 } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
1041 runtime_cacherefs_stats[cpu].n != 0) {
1042 total = avg_stats(&runtime_cacherefs_stats[cpu]);
1043
1044 if (total)
1045 ratio = avg * 100 / total;
1046
1047 fprintf(output, " # %8.3f %% of all cache refs ", ratio);
1048
1049 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
1050 print_stalled_cycles_frontend(cpu, evsel, avg);
1051 } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
1052 print_stalled_cycles_backend(cpu, evsel, avg);
1053 } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
1054 total = avg_stats(&runtime_nsecs_stats[cpu]);
1055
1056 if (total) {
1057 ratio = avg / total;
1058 fprintf(output, " # %8.3f GHz ", ratio);
1059 }
1060 } else if (transaction_run &&
1061 perf_evsel__cmp(evsel, nth_evsel(T_CYCLES_IN_TX))) {
1062 total = avg_stats(&runtime_cycles_stats[cpu]);
1063 if (total)
1064 fprintf(output,
1065 " # %5.2f%% transactional cycles ",
1066 100.0 * (avg / total));
1067 } else if (transaction_run &&
1068 perf_evsel__cmp(evsel, nth_evsel(T_CYCLES_IN_TX_CP))) {
1069 total = avg_stats(&runtime_cycles_stats[cpu]);
1070 total2 = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
1071 if (total2 < avg)
1072 total2 = avg;
1073 if (total)
1074 fprintf(output,
1075 " # %5.2f%% aborted cycles ",
1076 100.0 * ((total2-avg) / total));
1077 } else if (transaction_run &&
1078 perf_evsel__cmp(evsel, nth_evsel(T_TRANSACTION_START)) &&
1079 avg > 0 &&
1080 runtime_cycles_in_tx_stats[cpu].n != 0) {
1081 total = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
1082
1083 if (total)
1084 ratio = total / avg;
1085
1086 fprintf(output, " # %8.0f cycles / transaction ", ratio);
1087 } else if (transaction_run &&
1088 perf_evsel__cmp(evsel, nth_evsel(T_ELISION_START)) &&
1089 avg > 0 &&
1090 runtime_cycles_in_tx_stats[cpu].n != 0) {
1091 total = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
1092
1093 if (total)
1094 ratio = total / avg;
1095
1096 fprintf(output, " # %8.0f cycles / elision ", ratio);
1097 } else if (runtime_nsecs_stats[cpu].n != 0) {
1098 char unit = 'M';
1099
1100 total = avg_stats(&runtime_nsecs_stats[cpu]);
1101
1102 if (total)
1103 ratio = 1000.0 * avg / total;
1104 if (ratio < 0.001) {
1105 ratio *= 1000;
1106 unit = 'K';
1107 }
1108
1109 fprintf(output, " # %8.3f %c/sec ", ratio, unit);
1110 } else {
1111 fprintf(output, " ");
1112 }
1113}
1114
1115static void print_aggr(char *prefix)
1116{
1117 struct perf_evsel *counter;
1118 int cpu, cpu2, s, s2, id, nr;
1119 double uval;
1120 u64 ena, run, val;
1121
1122 if (!(aggr_map || aggr_get_id))
1123 return;
1124
1125 for (s = 0; s < aggr_map->nr; s++) {
1126 id = aggr_map->map[s];
1127 evlist__for_each(evsel_list, counter) {
1128 val = ena = run = 0;
1129 nr = 0;
1130 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1131 cpu2 = perf_evsel__cpus(counter)->map[cpu];
1132 s2 = aggr_get_id(evsel_list->cpus, cpu2);
1133 if (s2 != id)
1134 continue;
1135 val += counter->counts->cpu[cpu].val;
1136 ena += counter->counts->cpu[cpu].ena;
1137 run += counter->counts->cpu[cpu].run;
1138 nr++;
1139 }
1140 if (prefix)
1141 fprintf(output, "%s", prefix);
1142
1143 if (run == 0 || ena == 0) {
1144 aggr_printout(counter, id, nr);
1145
1146 fprintf(output, "%*s%s",
1147 csv_output ? 0 : 18,
1148 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1149 csv_sep);
1150
1151 fprintf(output, "%-*s%s",
1152 csv_output ? 0 : unit_width,
1153 counter->unit, csv_sep);
1154
1155 fprintf(output, "%*s",
1156 csv_output ? 0 : -25,
1157 perf_evsel__name(counter));
1158
1159 if (counter->cgrp)
1160 fprintf(output, "%s%s",
1161 csv_sep, counter->cgrp->name);
1162
1163 fputc('\n', output);
1164 continue;
1165 }
1166 uval = val * counter->scale;
1167
1168 if (nsec_counter(counter))
1169 nsec_printout(id, nr, counter, uval);
1170 else
1171 abs_printout(id, nr, counter, uval);
1172
1173 if (!csv_output) {
1174 print_noise(counter, 1.0);
1175
1176 if (run != ena)
1177 fprintf(output, " (%.2f%%)",
1178 100.0 * run / ena);
1179 }
1180 fputc('\n', output);
1181 }
1182 }
1183}
1184
1185/*
1186 * Print out the results of a single counter:
1187 * aggregated counts in system-wide mode
1188 */
1189static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
1190{
1191 struct perf_stat *ps = counter->priv;
1192 double avg = avg_stats(&ps->res_stats[0]);
1193 int scaled = counter->counts->scaled;
1194 double uval;
1195
1196 if (prefix)
1197 fprintf(output, "%s", prefix);
1198
1199 if (scaled == -1) {
1200 fprintf(output, "%*s%s",
1201 csv_output ? 0 : 18,
1202 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1203 csv_sep);
1204 fprintf(output, "%-*s%s",
1205 csv_output ? 0 : unit_width,
1206 counter->unit, csv_sep);
1207 fprintf(output, "%*s",
1208 csv_output ? 0 : -25,
1209 perf_evsel__name(counter));
1210
1211 if (counter->cgrp)
1212 fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
1213
1214 fputc('\n', output);
1215 return;
1216 }
1217
1218 uval = avg * counter->scale;
1219
1220 if (nsec_counter(counter))
1221 nsec_printout(-1, 0, counter, uval);
1222 else
1223 abs_printout(-1, 0, counter, uval);
1224
1225 print_noise(counter, avg);
1226
1227 if (csv_output) {
1228 fputc('\n', output);
1229 return;
1230 }
1231
1232 if (scaled) {
1233 double avg_enabled, avg_running;
1234
1235 avg_enabled = avg_stats(&ps->res_stats[1]);
1236 avg_running = avg_stats(&ps->res_stats[2]);
1237
1238 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
1239 }
1240 fprintf(output, "\n");
1241}
1242
1243/*
1244 * Print out the results of a single counter:
1245 * does not use aggregated count in system-wide
1246 */
1247static void print_counter(struct perf_evsel *counter, char *prefix)
1248{
1249 u64 ena, run, val;
1250 double uval;
1251 int cpu;
1252
1253 for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1254 val = counter->counts->cpu[cpu].val;
1255 ena = counter->counts->cpu[cpu].ena;
1256 run = counter->counts->cpu[cpu].run;
1257
1258 if (prefix)
1259 fprintf(output, "%s", prefix);
1260
1261 if (run == 0 || ena == 0) {
1262 fprintf(output, "CPU%*d%s%*s%s",
1263 csv_output ? 0 : -4,
1264 perf_evsel__cpus(counter)->map[cpu], csv_sep,
1265 csv_output ? 0 : 18,
1266 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1267 csv_sep);
1268
1269 fprintf(output, "%-*s%s",
1270 csv_output ? 0 : unit_width,
1271 counter->unit, csv_sep);
1272
1273 fprintf(output, "%*s",
1274 csv_output ? 0 : -25,
1275 perf_evsel__name(counter));
1276
1277 if (counter->cgrp)
1278 fprintf(output, "%s%s",
1279 csv_sep, counter->cgrp->name);
1280
1281 fputc('\n', output);
1282 continue;
1283 }
1284
1285 uval = val * counter->scale;
1286
1287 if (nsec_counter(counter))
1288 nsec_printout(cpu, 0, counter, uval);
1289 else
1290 abs_printout(cpu, 0, counter, uval);
1291
1292 if (!csv_output) {
1293 print_noise(counter, 1.0);
1294
1295 if (run != ena)
1296 fprintf(output, " (%.2f%%)",
1297 100.0 * run / ena);
1298 }
1299 fputc('\n', output);
1300 }
1301}
1302
1303static void print_stat(int argc, const char **argv)
1304{
1305 struct perf_evsel *counter;
1306 int i;
1307
1308 fflush(stdout);
1309
1310 if (!csv_output) {
1311 fprintf(output, "\n");
1312 fprintf(output, " Performance counter stats for ");
1313 if (target.system_wide)
1314 fprintf(output, "\'system wide");
1315 else if (target.cpu_list)
1316 fprintf(output, "\'CPU(s) %s", target.cpu_list);
1317 else if (!target__has_task(&target)) {
1318 fprintf(output, "\'%s", argv[0]);
1319 for (i = 1; i < argc; i++)
1320 fprintf(output, " %s", argv[i]);
1321 } else if (target.pid)
1322 fprintf(output, "process id \'%s", target.pid);
1323 else
1324 fprintf(output, "thread id \'%s", target.tid);
1325
1326 fprintf(output, "\'");
1327 if (run_count > 1)
1328 fprintf(output, " (%d runs)", run_count);
1329 fprintf(output, ":\n\n");
1330 }
1331
1332 switch (aggr_mode) {
1333 case AGGR_CORE:
1334 case AGGR_SOCKET:
1335 print_aggr(NULL);
1336 break;
1337 case AGGR_GLOBAL:
1338 evlist__for_each(evsel_list, counter)
1339 print_counter_aggr(counter, NULL);
1340 break;
1341 case AGGR_NONE:
1342 evlist__for_each(evsel_list, counter)
1343 print_counter(counter, NULL);
1344 break;
1345 default:
1346 break;
1347 }
1348
1349 if (!csv_output) {
1350 if (!null_run)
1351 fprintf(output, "\n");
1352 fprintf(output, " %17.9f seconds time elapsed",
1353 avg_stats(&walltime_nsecs_stats)/1e9);
1354 if (run_count > 1) {
1355 fprintf(output, " ");
1356 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1357 avg_stats(&walltime_nsecs_stats));
1358 }
1359 fprintf(output, "\n\n");
1360 }
1361}
1362
1363static volatile int signr = -1;
1364
1365static void skip_signal(int signo)
1366{
1367 if ((child_pid == -1) || interval)
1368 done = 1;
1369
1370 signr = signo;
1371 /*
1372 * render child_pid harmless
1373 * won't send SIGTERM to a random
1374 * process in case of race condition
1375 * and fast PID recycling
1376 */
1377 child_pid = -1;
1378}
1379
1380static void sig_atexit(void)
1381{
1382 sigset_t set, oset;
1383
1384 /*
1385 * avoid race condition with SIGCHLD handler
1386 * in skip_signal() which is modifying child_pid
1387 * goal is to avoid send SIGTERM to a random
1388 * process
1389 */
1390 sigemptyset(&set);
1391 sigaddset(&set, SIGCHLD);
1392 sigprocmask(SIG_BLOCK, &set, &oset);
1393
1394 if (child_pid != -1)
1395 kill(child_pid, SIGTERM);
1396
1397 sigprocmask(SIG_SETMASK, &oset, NULL);
1398
1399 if (signr == -1)
1400 return;
1401
1402 signal(signr, SIG_DFL);
1403 kill(getpid(), signr);
1404}
1405
1406static int stat__set_big_num(const struct option *opt __maybe_unused,
1407 const char *s __maybe_unused, int unset)
1408{
1409 big_num_opt = unset ? 0 : 1;
1410 return 0;
1411}
1412
1413static int perf_stat_init_aggr_mode(void)
1414{
1415 switch (aggr_mode) {
1416 case AGGR_SOCKET:
1417 if (cpu_map__build_socket_map(evsel_list->cpus, &aggr_map)) {
1418 perror("cannot build socket map");
1419 return -1;
1420 }
1421 aggr_get_id = cpu_map__get_socket;
1422 break;
1423 case AGGR_CORE:
1424 if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
1425 perror("cannot build core map");
1426 return -1;
1427 }
1428 aggr_get_id = cpu_map__get_core;
1429 break;
1430 case AGGR_NONE:
1431 case AGGR_GLOBAL:
1432 default:
1433 break;
1434 }
1435 return 0;
1436}
1437
1438static int setup_events(const char * const *attrs, unsigned len)
1439{
1440 unsigned i;
1441
1442 for (i = 0; i < len; i++) {
1443 if (parse_events(evsel_list, attrs[i]))
1444 return -1;
1445 }
1446 return 0;
1447}
1448
1449/*
1450 * Add default attributes, if there were no attributes specified or
1451 * if -d/--detailed, -d -d or -d -d -d is used:
1452 */
1453static int add_default_attributes(void)
1454{
1455 struct perf_event_attr default_attrs[] = {
1456
1457 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
1458 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
1459 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
1460 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
1461
1462 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
1463 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1464 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
1465 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
1466 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
1467 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
1468
1469};
1470
1471/*
1472 * Detailed stats (-d), covering the L1 and last level data caches:
1473 */
1474 struct perf_event_attr detailed_attrs[] = {
1475
1476 { .type = PERF_TYPE_HW_CACHE,
1477 .config =
1478 PERF_COUNT_HW_CACHE_L1D << 0 |
1479 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1480 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1481
1482 { .type = PERF_TYPE_HW_CACHE,
1483 .config =
1484 PERF_COUNT_HW_CACHE_L1D << 0 |
1485 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1486 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1487
1488 { .type = PERF_TYPE_HW_CACHE,
1489 .config =
1490 PERF_COUNT_HW_CACHE_LL << 0 |
1491 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1492 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1493
1494 { .type = PERF_TYPE_HW_CACHE,
1495 .config =
1496 PERF_COUNT_HW_CACHE_LL << 0 |
1497 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1498 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1499};
1500
1501/*
1502 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1503 */
1504 struct perf_event_attr very_detailed_attrs[] = {
1505
1506 { .type = PERF_TYPE_HW_CACHE,
1507 .config =
1508 PERF_COUNT_HW_CACHE_L1I << 0 |
1509 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1510 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1511
1512 { .type = PERF_TYPE_HW_CACHE,
1513 .config =
1514 PERF_COUNT_HW_CACHE_L1I << 0 |
1515 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1516 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1517
1518 { .type = PERF_TYPE_HW_CACHE,
1519 .config =
1520 PERF_COUNT_HW_CACHE_DTLB << 0 |
1521 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1522 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1523
1524 { .type = PERF_TYPE_HW_CACHE,
1525 .config =
1526 PERF_COUNT_HW_CACHE_DTLB << 0 |
1527 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1528 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1529
1530 { .type = PERF_TYPE_HW_CACHE,
1531 .config =
1532 PERF_COUNT_HW_CACHE_ITLB << 0 |
1533 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1534 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1535
1536 { .type = PERF_TYPE_HW_CACHE,
1537 .config =
1538 PERF_COUNT_HW_CACHE_ITLB << 0 |
1539 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1540 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1541
1542};
1543
1544/*
1545 * Very, very detailed stats (-d -d -d), adding prefetch events:
1546 */
1547 struct perf_event_attr very_very_detailed_attrs[] = {
1548
1549 { .type = PERF_TYPE_HW_CACHE,
1550 .config =
1551 PERF_COUNT_HW_CACHE_L1D << 0 |
1552 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1553 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1554
1555 { .type = PERF_TYPE_HW_CACHE,
1556 .config =
1557 PERF_COUNT_HW_CACHE_L1D << 0 |
1558 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
1559 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1560};
1561
1562 /* Set attrs if no event is selected and !null_run: */
1563 if (null_run)
1564 return 0;
1565
1566 if (transaction_run) {
1567 int err;
1568 if (pmu_have_event("cpu", "cycles-ct") &&
1569 pmu_have_event("cpu", "el-start"))
1570 err = setup_events(transaction_attrs,
1571 ARRAY_SIZE(transaction_attrs));
1572 else
1573 err = setup_events(transaction_limited_attrs,
1574 ARRAY_SIZE(transaction_limited_attrs));
1575 if (err < 0) {
1576 fprintf(stderr, "Cannot set up transaction events\n");
1577 return -1;
1578 }
1579 return 0;
1580 }
1581
1582 if (!evsel_list->nr_entries) {
1583 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1584 return -1;
1585 }
1586
1587 /* Detailed events get appended to the event list: */
1588
1589 if (detailed_run < 1)
1590 return 0;
1591
1592 /* Append detailed run extra attributes: */
1593 if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1594 return -1;
1595
1596 if (detailed_run < 2)
1597 return 0;
1598
1599 /* Append very detailed run extra attributes: */
1600 if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1601 return -1;
1602
1603 if (detailed_run < 3)
1604 return 0;
1605
1606 /* Append very, very detailed run extra attributes: */
1607 return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1608}
1609
1610int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
1611{
1612 bool append_file = false;
1613 int output_fd = 0;
1614 const char *output_name = NULL;
1615 const struct option options[] = {
1616 OPT_BOOLEAN('T', "transaction", &transaction_run,
1617 "hardware transaction statistics"),
1618 OPT_CALLBACK('e', "event", &evsel_list, "event",
1619 "event selector. use 'perf list' to list available events",
1620 parse_events_option),
1621 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1622 "event filter", parse_filter),
1623 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1624 "child tasks do not inherit counters"),
1625 OPT_STRING('p', "pid", &target.pid, "pid",
1626 "stat events on existing process id"),
1627 OPT_STRING('t', "tid", &target.tid, "tid",
1628 "stat events on existing thread id"),
1629 OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1630 "system-wide collection from all CPUs"),
1631 OPT_BOOLEAN('g', "group", &group,
1632 "put the counters into a counter group"),
1633 OPT_BOOLEAN('c', "scale", &scale, "scale/normalize counters"),
1634 OPT_INCR('v', "verbose", &verbose,
1635 "be more verbose (show counter open errors, etc)"),
1636 OPT_INTEGER('r', "repeat", &run_count,
1637 "repeat command and print average + stddev (max: 100, forever: 0)"),
1638 OPT_BOOLEAN('n', "null", &null_run,
1639 "null run - dont start any counters"),
1640 OPT_INCR('d', "detailed", &detailed_run,
1641 "detailed run - start a lot of events"),
1642 OPT_BOOLEAN('S', "sync", &sync_run,
1643 "call sync() before starting a run"),
1644 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1645 "print large numbers with thousands\' separators",
1646 stat__set_big_num),
1647 OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1648 "list of cpus to monitor in system-wide"),
1649 OPT_SET_UINT('A', "no-aggr", &aggr_mode,
1650 "disable CPU count aggregation", AGGR_NONE),
1651 OPT_STRING('x', "field-separator", &csv_sep, "separator",
1652 "print counts with custom separator"),
1653 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1654 "monitor event in cgroup name only", parse_cgroups),
1655 OPT_STRING('o', "output", &output_name, "file", "output file name"),
1656 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1657 OPT_INTEGER(0, "log-fd", &output_fd,
1658 "log output to fd, instead of stderr"),
1659 OPT_STRING(0, "pre", &pre_cmd, "command",
1660 "command to run prior to the measured command"),
1661 OPT_STRING(0, "post", &post_cmd, "command",
1662 "command to run after to the measured command"),
1663 OPT_UINTEGER('I', "interval-print", &interval,
1664 "print counts at regular interval in ms (>= 100)"),
1665 OPT_SET_UINT(0, "per-socket", &aggr_mode,
1666 "aggregate counts per processor socket", AGGR_SOCKET),
1667 OPT_SET_UINT(0, "per-core", &aggr_mode,
1668 "aggregate counts per physical processor core", AGGR_CORE),
1669 OPT_UINTEGER('D', "delay", &initial_delay,
1670 "ms to wait before starting measurement after program start"),
1671 OPT_END()
1672 };
1673 const char * const stat_usage[] = {
1674 "perf stat [<options>] [<command>]",
1675 NULL
1676 };
1677 int status = -EINVAL, run_idx;
1678 const char *mode;
1679
1680 setlocale(LC_ALL, "");
1681
1682 evsel_list = perf_evlist__new();
1683 if (evsel_list == NULL)
1684 return -ENOMEM;
1685
1686 argc = parse_options(argc, argv, options, stat_usage,
1687 PARSE_OPT_STOP_AT_NON_OPTION);
1688
1689 output = stderr;
1690 if (output_name && strcmp(output_name, "-"))
1691 output = NULL;
1692
1693 if (output_name && output_fd) {
1694 fprintf(stderr, "cannot use both --output and --log-fd\n");
1695 parse_options_usage(stat_usage, options, "o", 1);
1696 parse_options_usage(NULL, options, "log-fd", 0);
1697 goto out;
1698 }
1699
1700 if (output_fd < 0) {
1701 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1702 parse_options_usage(stat_usage, options, "log-fd", 0);
1703 goto out;
1704 }
1705
1706 if (!output) {
1707 struct timespec tm;
1708 mode = append_file ? "a" : "w";
1709
1710 output = fopen(output_name, mode);
1711 if (!output) {
1712 perror("failed to create output file");
1713 return -1;
1714 }
1715 clock_gettime(CLOCK_REALTIME, &tm);
1716 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1717 } else if (output_fd > 0) {
1718 mode = append_file ? "a" : "w";
1719 output = fdopen(output_fd, mode);
1720 if (!output) {
1721 perror("Failed opening logfd");
1722 return -errno;
1723 }
1724 }
1725
1726 if (csv_sep) {
1727 csv_output = true;
1728 if (!strcmp(csv_sep, "\\t"))
1729 csv_sep = "\t";
1730 } else
1731 csv_sep = DEFAULT_SEPARATOR;
1732
1733 /*
1734 * let the spreadsheet do the pretty-printing
1735 */
1736 if (csv_output) {
1737 /* User explicitly passed -B? */
1738 if (big_num_opt == 1) {
1739 fprintf(stderr, "-B option not supported with -x\n");
1740 parse_options_usage(stat_usage, options, "B", 1);
1741 parse_options_usage(NULL, options, "x", 1);
1742 goto out;
1743 } else /* Nope, so disable big number formatting */
1744 big_num = false;
1745 } else if (big_num_opt == 0) /* User passed --no-big-num */
1746 big_num = false;
1747
1748 if (!argc && target__none(&target))
1749 usage_with_options(stat_usage, options);
1750
1751 if (run_count < 0) {
1752 pr_err("Run count must be a positive number\n");
1753 parse_options_usage(stat_usage, options, "r", 1);
1754 goto out;
1755 } else if (run_count == 0) {
1756 forever = true;
1757 run_count = 1;
1758 }
1759
1760 /* no_aggr, cgroup are for system-wide only */
1761 if ((aggr_mode != AGGR_GLOBAL || nr_cgroups) &&
1762 !target__has_cpu(&target)) {
1763 fprintf(stderr, "both cgroup and no-aggregation "
1764 "modes only available in system-wide mode\n");
1765
1766 parse_options_usage(stat_usage, options, "G", 1);
1767 parse_options_usage(NULL, options, "A", 1);
1768 parse_options_usage(NULL, options, "a", 1);
1769 goto out;
1770 }
1771
1772 if (add_default_attributes())
1773 goto out;
1774
1775 target__validate(&target);
1776
1777 if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1778 if (target__has_task(&target)) {
1779 pr_err("Problems finding threads of monitor\n");
1780 parse_options_usage(stat_usage, options, "p", 1);
1781 parse_options_usage(NULL, options, "t", 1);
1782 } else if (target__has_cpu(&target)) {
1783 perror("failed to parse CPUs map");
1784 parse_options_usage(stat_usage, options, "C", 1);
1785 parse_options_usage(NULL, options, "a", 1);
1786 }
1787 goto out;
1788 }
1789 if (interval && interval < 100) {
1790 pr_err("print interval must be >= 100ms\n");
1791 parse_options_usage(stat_usage, options, "I", 1);
1792 goto out;
1793 }
1794
1795 if (perf_evlist__alloc_stats(evsel_list, interval))
1796 goto out;
1797
1798 if (perf_stat_init_aggr_mode())
1799 goto out;
1800
1801 /*
1802 * We dont want to block the signals - that would cause
1803 * child tasks to inherit that and Ctrl-C would not work.
1804 * What we want is for Ctrl-C to work in the exec()-ed
1805 * task, but being ignored by perf stat itself:
1806 */
1807 atexit(sig_atexit);
1808 if (!forever)
1809 signal(SIGINT, skip_signal);
1810 signal(SIGCHLD, skip_signal);
1811 signal(SIGALRM, skip_signal);
1812 signal(SIGABRT, skip_signal);
1813
1814 status = 0;
1815 for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
1816 if (run_count != 1 && verbose)
1817 fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1818 run_idx + 1);
1819
1820 status = run_perf_stat(argc, argv);
1821 if (forever && status != -1) {
1822 print_stat(argc, argv);
1823 perf_stat__reset_stats(evsel_list);
1824 }
1825 }
1826
1827 if (!forever && status != -1 && !interval)
1828 print_stat(argc, argv);
1829
1830 perf_evlist__free_stats(evsel_list);
1831out:
1832 perf_evlist__delete(evsel_list);
1833 return status;
1834}
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 "util/cgroup.h"
45#include <subcmd/parse-options.h>
46#include "util/parse-events.h"
47#include "util/pmus.h"
48#include "util/pmu.h"
49#include "util/event.h"
50#include "util/evlist.h"
51#include "util/evsel.h"
52#include "util/debug.h"
53#include "util/color.h"
54#include "util/stat.h"
55#include "util/header.h"
56#include "util/cpumap.h"
57#include "util/thread_map.h"
58#include "util/counts.h"
59#include "util/topdown.h"
60#include "util/session.h"
61#include "util/tool.h"
62#include "util/string2.h"
63#include "util/metricgroup.h"
64#include "util/synthetic-events.h"
65#include "util/target.h"
66#include "util/time-utils.h"
67#include "util/top.h"
68#include "util/affinity.h"
69#include "util/pfm.h"
70#include "util/bpf_counter.h"
71#include "util/iostat.h"
72#include "util/util.h"
73#include "asm/bug.h"
74
75#include <linux/time64.h>
76#include <linux/zalloc.h>
77#include <api/fs/fs.h>
78#include <errno.h>
79#include <signal.h>
80#include <stdlib.h>
81#include <sys/prctl.h>
82#include <inttypes.h>
83#include <locale.h>
84#include <math.h>
85#include <sys/types.h>
86#include <sys/stat.h>
87#include <sys/wait.h>
88#include <unistd.h>
89#include <sys/time.h>
90#include <sys/resource.h>
91#include <linux/err.h>
92
93#include <linux/ctype.h>
94#include <perf/evlist.h>
95#include <internal/threadmap.h>
96
97#define DEFAULT_SEPARATOR " "
98#define FREEZE_ON_SMI_PATH "devices/cpu/freeze_on_smi"
99
100static void print_counters(struct timespec *ts, int argc, const char **argv);
101
102static struct evlist *evsel_list;
103static struct parse_events_option_args parse_events_option_args = {
104 .evlistp = &evsel_list,
105};
106
107static bool all_counters_use_bpf = true;
108
109static struct target target = {
110 .uid = UINT_MAX,
111};
112
113#define METRIC_ONLY_LEN 20
114
115static volatile sig_atomic_t child_pid = -1;
116static int detailed_run = 0;
117static bool transaction_run;
118static bool topdown_run = false;
119static bool smi_cost = false;
120static bool smi_reset = false;
121static int big_num_opt = -1;
122static const char *pre_cmd = NULL;
123static const char *post_cmd = NULL;
124static bool sync_run = false;
125static bool forever = false;
126static bool force_metric_only = false;
127static struct timespec ref_time;
128static bool append_file;
129static bool interval_count;
130static const char *output_name;
131static int output_fd;
132static char *metrics;
133
134struct perf_stat {
135 bool record;
136 struct perf_data data;
137 struct perf_session *session;
138 u64 bytes_written;
139 struct perf_tool tool;
140 bool maps_allocated;
141 struct perf_cpu_map *cpus;
142 struct perf_thread_map *threads;
143 enum aggr_mode aggr_mode;
144 u32 aggr_level;
145};
146
147static struct perf_stat perf_stat;
148#define STAT_RECORD perf_stat.record
149
150static volatile sig_atomic_t done = 0;
151
152static struct perf_stat_config stat_config = {
153 .aggr_mode = AGGR_GLOBAL,
154 .aggr_level = MAX_CACHE_LVL + 1,
155 .scale = true,
156 .unit_width = 4, /* strlen("unit") */
157 .run_count = 1,
158 .metric_only_len = METRIC_ONLY_LEN,
159 .walltime_nsecs_stats = &walltime_nsecs_stats,
160 .ru_stats = &ru_stats,
161 .big_num = true,
162 .ctl_fd = -1,
163 .ctl_fd_ack = -1,
164 .iostat_run = false,
165};
166
167static bool cpus_map_matched(struct evsel *a, struct evsel *b)
168{
169 if (!a->core.cpus && !b->core.cpus)
170 return true;
171
172 if (!a->core.cpus || !b->core.cpus)
173 return false;
174
175 if (perf_cpu_map__nr(a->core.cpus) != perf_cpu_map__nr(b->core.cpus))
176 return false;
177
178 for (int i = 0; i < perf_cpu_map__nr(a->core.cpus); i++) {
179 if (perf_cpu_map__cpu(a->core.cpus, i).cpu !=
180 perf_cpu_map__cpu(b->core.cpus, i).cpu)
181 return false;
182 }
183
184 return true;
185}
186
187static void evlist__check_cpu_maps(struct evlist *evlist)
188{
189 struct evsel *evsel, *warned_leader = NULL;
190
191 evlist__for_each_entry(evlist, evsel) {
192 struct evsel *leader = evsel__leader(evsel);
193
194 /* Check that leader matches cpus with each member. */
195 if (leader == evsel)
196 continue;
197 if (cpus_map_matched(leader, evsel))
198 continue;
199
200 /* If there's mismatch disable the group and warn user. */
201 if (warned_leader != leader) {
202 char buf[200];
203
204 pr_warning("WARNING: grouped events cpus do not match.\n"
205 "Events with CPUs not matching the leader will "
206 "be removed from the group.\n");
207 evsel__group_desc(leader, buf, sizeof(buf));
208 pr_warning(" %s\n", buf);
209 warned_leader = leader;
210 }
211 if (verbose > 0) {
212 char buf[200];
213
214 cpu_map__snprint(leader->core.cpus, buf, sizeof(buf));
215 pr_warning(" %s: %s\n", leader->name, buf);
216 cpu_map__snprint(evsel->core.cpus, buf, sizeof(buf));
217 pr_warning(" %s: %s\n", evsel->name, buf);
218 }
219
220 evsel__remove_from_group(evsel, leader);
221 }
222}
223
224static inline void diff_timespec(struct timespec *r, struct timespec *a,
225 struct timespec *b)
226{
227 r->tv_sec = a->tv_sec - b->tv_sec;
228 if (a->tv_nsec < b->tv_nsec) {
229 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
230 r->tv_sec--;
231 } else {
232 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
233 }
234}
235
236static void perf_stat__reset_stats(void)
237{
238 evlist__reset_stats(evsel_list);
239 perf_stat__reset_shadow_stats();
240}
241
242static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
243 union perf_event *event,
244 struct perf_sample *sample __maybe_unused,
245 struct machine *machine __maybe_unused)
246{
247 if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) {
248 pr_err("failed to write perf data, error: %m\n");
249 return -1;
250 }
251
252 perf_stat.bytes_written += event->header.size;
253 return 0;
254}
255
256static int write_stat_round_event(u64 tm, u64 type)
257{
258 return perf_event__synthesize_stat_round(NULL, tm, type,
259 process_synthesized_event,
260 NULL);
261}
262
263#define WRITE_STAT_ROUND_EVENT(time, interval) \
264 write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
265
266#define SID(e, x, y) xyarray__entry(e->core.sample_id, x, y)
267
268static int evsel__write_stat_event(struct evsel *counter, int cpu_map_idx, u32 thread,
269 struct perf_counts_values *count)
270{
271 struct perf_sample_id *sid = SID(counter, cpu_map_idx, thread);
272 struct perf_cpu cpu = perf_cpu_map__cpu(evsel__cpus(counter), cpu_map_idx);
273
274 return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
275 process_synthesized_event, NULL);
276}
277
278static int read_single_counter(struct evsel *counter, int cpu_map_idx,
279 int thread, struct timespec *rs)
280{
281 switch(counter->tool_event) {
282 case PERF_TOOL_DURATION_TIME: {
283 u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL;
284 struct perf_counts_values *count =
285 perf_counts(counter->counts, cpu_map_idx, thread);
286 count->ena = count->run = val;
287 count->val = val;
288 return 0;
289 }
290 case PERF_TOOL_USER_TIME:
291 case PERF_TOOL_SYSTEM_TIME: {
292 u64 val;
293 struct perf_counts_values *count =
294 perf_counts(counter->counts, cpu_map_idx, thread);
295 if (counter->tool_event == PERF_TOOL_USER_TIME)
296 val = ru_stats.ru_utime_usec_stat.mean;
297 else
298 val = ru_stats.ru_stime_usec_stat.mean;
299 count->ena = count->run = val;
300 count->val = val;
301 return 0;
302 }
303 default:
304 case PERF_TOOL_NONE:
305 return evsel__read_counter(counter, cpu_map_idx, thread);
306 case PERF_TOOL_MAX:
307 /* This should never be reached */
308 return 0;
309 }
310}
311
312/*
313 * Read out the results of a single counter:
314 * do not aggregate counts across CPUs in system-wide mode
315 */
316static int read_counter_cpu(struct evsel *counter, struct timespec *rs, int cpu_map_idx)
317{
318 int nthreads = perf_thread_map__nr(evsel_list->core.threads);
319 int thread;
320
321 if (!counter->supported)
322 return -ENOENT;
323
324 for (thread = 0; thread < nthreads; thread++) {
325 struct perf_counts_values *count;
326
327 count = perf_counts(counter->counts, cpu_map_idx, thread);
328
329 /*
330 * The leader's group read loads data into its group members
331 * (via evsel__read_counter()) and sets their count->loaded.
332 */
333 if (!perf_counts__is_loaded(counter->counts, cpu_map_idx, thread) &&
334 read_single_counter(counter, cpu_map_idx, thread, rs)) {
335 counter->counts->scaled = -1;
336 perf_counts(counter->counts, cpu_map_idx, thread)->ena = 0;
337 perf_counts(counter->counts, cpu_map_idx, thread)->run = 0;
338 return -1;
339 }
340
341 perf_counts__set_loaded(counter->counts, cpu_map_idx, thread, false);
342
343 if (STAT_RECORD) {
344 if (evsel__write_stat_event(counter, cpu_map_idx, thread, count)) {
345 pr_err("failed to write stat event\n");
346 return -1;
347 }
348 }
349
350 if (verbose > 1) {
351 fprintf(stat_config.output,
352 "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
353 evsel__name(counter),
354 perf_cpu_map__cpu(evsel__cpus(counter),
355 cpu_map_idx).cpu,
356 count->val, count->ena, count->run);
357 }
358 }
359
360 return 0;
361}
362
363static int read_affinity_counters(struct timespec *rs)
364{
365 struct evlist_cpu_iterator evlist_cpu_itr;
366 struct affinity saved_affinity, *affinity;
367
368 if (all_counters_use_bpf)
369 return 0;
370
371 if (!target__has_cpu(&target) || target__has_per_thread(&target))
372 affinity = NULL;
373 else if (affinity__setup(&saved_affinity) < 0)
374 return -1;
375 else
376 affinity = &saved_affinity;
377
378 evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) {
379 struct evsel *counter = evlist_cpu_itr.evsel;
380
381 if (evsel__is_bpf(counter))
382 continue;
383
384 if (!counter->err) {
385 counter->err = read_counter_cpu(counter, rs,
386 evlist_cpu_itr.cpu_map_idx);
387 }
388 }
389 if (affinity)
390 affinity__cleanup(&saved_affinity);
391
392 return 0;
393}
394
395static int read_bpf_map_counters(void)
396{
397 struct evsel *counter;
398 int err;
399
400 evlist__for_each_entry(evsel_list, counter) {
401 if (!evsel__is_bpf(counter))
402 continue;
403
404 err = bpf_counter__read(counter);
405 if (err)
406 return err;
407 }
408 return 0;
409}
410
411static int read_counters(struct timespec *rs)
412{
413 if (!stat_config.stop_read_counter) {
414 if (read_bpf_map_counters() ||
415 read_affinity_counters(rs))
416 return -1;
417 }
418 return 0;
419}
420
421static void process_counters(void)
422{
423 struct evsel *counter;
424
425 evlist__for_each_entry(evsel_list, counter) {
426 if (counter->err)
427 pr_debug("failed to read counter %s\n", counter->name);
428 if (counter->err == 0 && perf_stat_process_counter(&stat_config, counter))
429 pr_warning("failed to process counter %s\n", counter->name);
430 counter->err = 0;
431 }
432
433 perf_stat_merge_counters(&stat_config, evsel_list);
434 perf_stat_process_percore(&stat_config, evsel_list);
435}
436
437static void process_interval(void)
438{
439 struct timespec ts, rs;
440
441 clock_gettime(CLOCK_MONOTONIC, &ts);
442 diff_timespec(&rs, &ts, &ref_time);
443
444 evlist__reset_aggr_stats(evsel_list);
445
446 if (read_counters(&rs) == 0)
447 process_counters();
448
449 if (STAT_RECORD) {
450 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
451 pr_err("failed to write stat round event\n");
452 }
453
454 init_stats(&walltime_nsecs_stats);
455 update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000ULL);
456 print_counters(&rs, 0, NULL);
457}
458
459static bool handle_interval(unsigned int interval, int *times)
460{
461 if (interval) {
462 process_interval();
463 if (interval_count && !(--(*times)))
464 return true;
465 }
466 return false;
467}
468
469static int enable_counters(void)
470{
471 struct evsel *evsel;
472 int err;
473
474 evlist__for_each_entry(evsel_list, evsel) {
475 if (!evsel__is_bpf(evsel))
476 continue;
477
478 err = bpf_counter__enable(evsel);
479 if (err)
480 return err;
481 }
482
483 if (!target__enable_on_exec(&target)) {
484 if (!all_counters_use_bpf)
485 evlist__enable(evsel_list);
486 }
487 return 0;
488}
489
490static void disable_counters(void)
491{
492 struct evsel *counter;
493
494 /*
495 * If we don't have tracee (attaching to task or cpu), counters may
496 * still be running. To get accurate group ratios, we must stop groups
497 * from counting before reading their constituent counters.
498 */
499 if (!target__none(&target)) {
500 evlist__for_each_entry(evsel_list, counter)
501 bpf_counter__disable(counter);
502 if (!all_counters_use_bpf)
503 evlist__disable(evsel_list);
504 }
505}
506
507static volatile sig_atomic_t workload_exec_errno;
508
509/*
510 * evlist__prepare_workload will send a SIGUSR1
511 * if the fork fails, since we asked by setting its
512 * want_signal to true.
513 */
514static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
515 void *ucontext __maybe_unused)
516{
517 workload_exec_errno = info->si_value.sival_int;
518}
519
520static bool evsel__should_store_id(struct evsel *counter)
521{
522 return STAT_RECORD || counter->core.attr.read_format & PERF_FORMAT_ID;
523}
524
525static bool is_target_alive(struct target *_target,
526 struct perf_thread_map *threads)
527{
528 struct stat st;
529 int i;
530
531 if (!target__has_task(_target))
532 return true;
533
534 for (i = 0; i < threads->nr; i++) {
535 char path[PATH_MAX];
536
537 scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(),
538 threads->map[i].pid);
539
540 if (!stat(path, &st))
541 return true;
542 }
543
544 return false;
545}
546
547static void process_evlist(struct evlist *evlist, unsigned int interval)
548{
549 enum evlist_ctl_cmd cmd = EVLIST_CTL_CMD_UNSUPPORTED;
550
551 if (evlist__ctlfd_process(evlist, &cmd) > 0) {
552 switch (cmd) {
553 case EVLIST_CTL_CMD_ENABLE:
554 fallthrough;
555 case EVLIST_CTL_CMD_DISABLE:
556 if (interval)
557 process_interval();
558 break;
559 case EVLIST_CTL_CMD_SNAPSHOT:
560 case EVLIST_CTL_CMD_ACK:
561 case EVLIST_CTL_CMD_UNSUPPORTED:
562 case EVLIST_CTL_CMD_EVLIST:
563 case EVLIST_CTL_CMD_STOP:
564 case EVLIST_CTL_CMD_PING:
565 default:
566 break;
567 }
568 }
569}
570
571static void compute_tts(struct timespec *time_start, struct timespec *time_stop,
572 int *time_to_sleep)
573{
574 int tts = *time_to_sleep;
575 struct timespec time_diff;
576
577 diff_timespec(&time_diff, time_stop, time_start);
578
579 tts -= time_diff.tv_sec * MSEC_PER_SEC +
580 time_diff.tv_nsec / NSEC_PER_MSEC;
581
582 if (tts < 0)
583 tts = 0;
584
585 *time_to_sleep = tts;
586}
587
588static int dispatch_events(bool forks, int timeout, int interval, int *times)
589{
590 int child_exited = 0, status = 0;
591 int time_to_sleep, sleep_time;
592 struct timespec time_start, time_stop;
593
594 if (interval)
595 sleep_time = interval;
596 else if (timeout)
597 sleep_time = timeout;
598 else
599 sleep_time = 1000;
600
601 time_to_sleep = sleep_time;
602
603 while (!done) {
604 if (forks)
605 child_exited = waitpid(child_pid, &status, WNOHANG);
606 else
607 child_exited = !is_target_alive(&target, evsel_list->core.threads) ? 1 : 0;
608
609 if (child_exited)
610 break;
611
612 clock_gettime(CLOCK_MONOTONIC, &time_start);
613 if (!(evlist__poll(evsel_list, time_to_sleep) > 0)) { /* poll timeout or EINTR */
614 if (timeout || handle_interval(interval, times))
615 break;
616 time_to_sleep = sleep_time;
617 } else { /* fd revent */
618 process_evlist(evsel_list, interval);
619 clock_gettime(CLOCK_MONOTONIC, &time_stop);
620 compute_tts(&time_start, &time_stop, &time_to_sleep);
621 }
622 }
623
624 return status;
625}
626
627enum counter_recovery {
628 COUNTER_SKIP,
629 COUNTER_RETRY,
630 COUNTER_FATAL,
631};
632
633static enum counter_recovery stat_handle_error(struct evsel *counter)
634{
635 char msg[BUFSIZ];
636 /*
637 * PPC returns ENXIO for HW counters until 2.6.37
638 * (behavior changed with commit b0a873e).
639 */
640 if (errno == EINVAL || errno == ENOSYS ||
641 errno == ENOENT || errno == EOPNOTSUPP ||
642 errno == ENXIO) {
643 if (verbose > 0)
644 ui__warning("%s event is not supported by the kernel.\n",
645 evsel__name(counter));
646 counter->supported = false;
647 /*
648 * errored is a sticky flag that means one of the counter's
649 * cpu event had a problem and needs to be reexamined.
650 */
651 counter->errored = true;
652
653 if ((evsel__leader(counter) != counter) ||
654 !(counter->core.leader->nr_members > 1))
655 return COUNTER_SKIP;
656 } else if (evsel__fallback(counter, &target, errno, msg, sizeof(msg))) {
657 if (verbose > 0)
658 ui__warning("%s\n", msg);
659 return COUNTER_RETRY;
660 } else if (target__has_per_thread(&target) &&
661 evsel_list->core.threads &&
662 evsel_list->core.threads->err_thread != -1) {
663 /*
664 * For global --per-thread case, skip current
665 * error thread.
666 */
667 if (!thread_map__remove(evsel_list->core.threads,
668 evsel_list->core.threads->err_thread)) {
669 evsel_list->core.threads->err_thread = -1;
670 return COUNTER_RETRY;
671 }
672 } else if (counter->skippable) {
673 if (verbose > 0)
674 ui__warning("skipping event %s that kernel failed to open .\n",
675 evsel__name(counter));
676 counter->supported = false;
677 counter->errored = true;
678 return COUNTER_SKIP;
679 }
680
681 evsel__open_strerror(counter, &target, errno, msg, sizeof(msg));
682 ui__error("%s\n", msg);
683
684 if (child_pid != -1)
685 kill(child_pid, SIGTERM);
686 return COUNTER_FATAL;
687}
688
689static int __run_perf_stat(int argc, const char **argv, int run_idx)
690{
691 int interval = stat_config.interval;
692 int times = stat_config.times;
693 int timeout = stat_config.timeout;
694 char msg[BUFSIZ];
695 unsigned long long t0, t1;
696 struct evsel *counter;
697 size_t l;
698 int status = 0;
699 const bool forks = (argc > 0);
700 bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false;
701 struct evlist_cpu_iterator evlist_cpu_itr;
702 struct affinity saved_affinity, *affinity = NULL;
703 int err;
704 bool second_pass = false;
705
706 if (forks) {
707 if (evlist__prepare_workload(evsel_list, &target, argv, is_pipe, workload_exec_failed_signal) < 0) {
708 perror("failed to prepare workload");
709 return -1;
710 }
711 child_pid = evsel_list->workload.pid;
712 }
713
714 if (!cpu_map__is_dummy(evsel_list->core.user_requested_cpus)) {
715 if (affinity__setup(&saved_affinity) < 0)
716 return -1;
717 affinity = &saved_affinity;
718 }
719
720 evlist__for_each_entry(evsel_list, counter) {
721 counter->reset_group = false;
722 if (bpf_counter__load(counter, &target))
723 return -1;
724 if (!(evsel__is_bperf(counter)))
725 all_counters_use_bpf = false;
726 }
727
728 evlist__reset_aggr_stats(evsel_list);
729
730 evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) {
731 counter = evlist_cpu_itr.evsel;
732
733 /*
734 * bperf calls evsel__open_per_cpu() in bperf__load(), so
735 * no need to call it again here.
736 */
737 if (target.use_bpf)
738 break;
739
740 if (counter->reset_group || counter->errored)
741 continue;
742 if (evsel__is_bperf(counter))
743 continue;
744try_again:
745 if (create_perf_stat_counter(counter, &stat_config, &target,
746 evlist_cpu_itr.cpu_map_idx) < 0) {
747
748 /*
749 * Weak group failed. We cannot just undo this here
750 * because earlier CPUs might be in group mode, and the kernel
751 * doesn't support mixing group and non group reads. Defer
752 * it to later.
753 * Don't close here because we're in the wrong affinity.
754 */
755 if ((errno == EINVAL || errno == EBADF) &&
756 evsel__leader(counter) != counter &&
757 counter->weak_group) {
758 evlist__reset_weak_group(evsel_list, counter, false);
759 assert(counter->reset_group);
760 second_pass = true;
761 continue;
762 }
763
764 switch (stat_handle_error(counter)) {
765 case COUNTER_FATAL:
766 return -1;
767 case COUNTER_RETRY:
768 goto try_again;
769 case COUNTER_SKIP:
770 continue;
771 default:
772 break;
773 }
774
775 }
776 counter->supported = true;
777 }
778
779 if (second_pass) {
780 /*
781 * Now redo all the weak group after closing them,
782 * and also close errored counters.
783 */
784
785 /* First close errored or weak retry */
786 evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) {
787 counter = evlist_cpu_itr.evsel;
788
789 if (!counter->reset_group && !counter->errored)
790 continue;
791
792 perf_evsel__close_cpu(&counter->core, evlist_cpu_itr.cpu_map_idx);
793 }
794 /* Now reopen weak */
795 evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) {
796 counter = evlist_cpu_itr.evsel;
797
798 if (!counter->reset_group)
799 continue;
800try_again_reset:
801 pr_debug2("reopening weak %s\n", evsel__name(counter));
802 if (create_perf_stat_counter(counter, &stat_config, &target,
803 evlist_cpu_itr.cpu_map_idx) < 0) {
804
805 switch (stat_handle_error(counter)) {
806 case COUNTER_FATAL:
807 return -1;
808 case COUNTER_RETRY:
809 goto try_again_reset;
810 case COUNTER_SKIP:
811 continue;
812 default:
813 break;
814 }
815 }
816 counter->supported = true;
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 (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 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 if (target.initial_delay) {
863 pr_info(EVLIST_DISABLED_MSG);
864 } else {
865 err = enable_counters();
866 if (err)
867 return -1;
868 }
869
870 /* Exec the command, if any */
871 if (forks)
872 evlist__start_workload(evsel_list);
873
874 if (target.initial_delay > 0) {
875 usleep(target.initial_delay * USEC_PER_MSEC);
876 err = enable_counters();
877 if (err)
878 return -1;
879
880 pr_info(EVLIST_ENABLED_MSG);
881 }
882
883 t0 = rdclock();
884 clock_gettime(CLOCK_MONOTONIC, &ref_time);
885
886 if (forks) {
887 if (interval || timeout || evlist__ctlfd_initialized(evsel_list))
888 status = dispatch_events(forks, timeout, interval, ×);
889 if (child_pid != -1) {
890 if (timeout)
891 kill(child_pid, SIGTERM);
892 wait4(child_pid, &status, 0, &stat_config.ru_data);
893 }
894
895 if (workload_exec_errno) {
896 const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
897 pr_err("Workload failed: %s\n", emsg);
898 return -1;
899 }
900
901 if (WIFSIGNALED(status))
902 psignal(WTERMSIG(status), argv[0]);
903 } else {
904 status = dispatch_events(forks, timeout, interval, ×);
905 }
906
907 disable_counters();
908
909 t1 = rdclock();
910
911 if (stat_config.walltime_run_table)
912 stat_config.walltime_run[run_idx] = t1 - t0;
913
914 if (interval && stat_config.summary) {
915 stat_config.interval = 0;
916 stat_config.stop_read_counter = true;
917 init_stats(&walltime_nsecs_stats);
918 update_stats(&walltime_nsecs_stats, t1 - t0);
919
920 evlist__copy_prev_raw_counts(evsel_list);
921 evlist__reset_prev_raw_counts(evsel_list);
922 evlist__reset_aggr_stats(evsel_list);
923 } else {
924 update_stats(&walltime_nsecs_stats, t1 - t0);
925 update_rusage_stats(&ru_stats, &stat_config.ru_data);
926 }
927
928 /*
929 * Closing a group leader splits the group, and as we only disable
930 * group leaders, results in remaining events becoming enabled. To
931 * avoid arbitrary skew, we must read all counters before closing any
932 * group leaders.
933 */
934 if (read_counters(&(struct timespec) { .tv_nsec = t1-t0 }) == 0)
935 process_counters();
936
937 /*
938 * We need to keep evsel_list alive, because it's processed
939 * later the evsel_list will be closed after.
940 */
941 if (!STAT_RECORD)
942 evlist__close(evsel_list);
943
944 return WEXITSTATUS(status);
945}
946
947static int run_perf_stat(int argc, const char **argv, int run_idx)
948{
949 int ret;
950
951 if (pre_cmd) {
952 ret = system(pre_cmd);
953 if (ret)
954 return ret;
955 }
956
957 if (sync_run)
958 sync();
959
960 ret = __run_perf_stat(argc, argv, run_idx);
961 if (ret)
962 return ret;
963
964 if (post_cmd) {
965 ret = system(post_cmd);
966 if (ret)
967 return ret;
968 }
969
970 return ret;
971}
972
973static void print_counters(struct timespec *ts, int argc, const char **argv)
974{
975 /* Do not print anything if we record to the pipe. */
976 if (STAT_RECORD && perf_stat.data.is_pipe)
977 return;
978 if (quiet)
979 return;
980
981 evlist__print_counters(evsel_list, &stat_config, &target, ts, argc, argv);
982}
983
984static volatile sig_atomic_t signr = -1;
985
986static void skip_signal(int signo)
987{
988 if ((child_pid == -1) || stat_config.interval)
989 done = 1;
990
991 signr = signo;
992 /*
993 * render child_pid harmless
994 * won't send SIGTERM to a random
995 * process in case of race condition
996 * and fast PID recycling
997 */
998 child_pid = -1;
999}
1000
1001static void sig_atexit(void)
1002{
1003 sigset_t set, oset;
1004
1005 /*
1006 * avoid race condition with SIGCHLD handler
1007 * in skip_signal() which is modifying child_pid
1008 * goal is to avoid send SIGTERM to a random
1009 * process
1010 */
1011 sigemptyset(&set);
1012 sigaddset(&set, SIGCHLD);
1013 sigprocmask(SIG_BLOCK, &set, &oset);
1014
1015 if (child_pid != -1)
1016 kill(child_pid, SIGTERM);
1017
1018 sigprocmask(SIG_SETMASK, &oset, NULL);
1019
1020 if (signr == -1)
1021 return;
1022
1023 signal(signr, SIG_DFL);
1024 kill(getpid(), signr);
1025}
1026
1027void perf_stat__set_big_num(int set)
1028{
1029 stat_config.big_num = (set != 0);
1030}
1031
1032void perf_stat__set_no_csv_summary(int set)
1033{
1034 stat_config.no_csv_summary = (set != 0);
1035}
1036
1037static int stat__set_big_num(const struct option *opt __maybe_unused,
1038 const char *s __maybe_unused, int unset)
1039{
1040 big_num_opt = unset ? 0 : 1;
1041 perf_stat__set_big_num(!unset);
1042 return 0;
1043}
1044
1045static int enable_metric_only(const struct option *opt __maybe_unused,
1046 const char *s __maybe_unused, int unset)
1047{
1048 force_metric_only = true;
1049 stat_config.metric_only = !unset;
1050 return 0;
1051}
1052
1053static int append_metric_groups(const struct option *opt __maybe_unused,
1054 const char *str,
1055 int unset __maybe_unused)
1056{
1057 if (metrics) {
1058 char *tmp;
1059
1060 if (asprintf(&tmp, "%s,%s", metrics, str) < 0)
1061 return -ENOMEM;
1062 free(metrics);
1063 metrics = tmp;
1064 } else {
1065 metrics = strdup(str);
1066 if (!metrics)
1067 return -ENOMEM;
1068 }
1069 return 0;
1070}
1071
1072static int parse_control_option(const struct option *opt,
1073 const char *str,
1074 int unset __maybe_unused)
1075{
1076 struct perf_stat_config *config = opt->value;
1077
1078 return evlist__parse_control(str, &config->ctl_fd, &config->ctl_fd_ack, &config->ctl_fd_close);
1079}
1080
1081static int parse_stat_cgroups(const struct option *opt,
1082 const char *str, int unset)
1083{
1084 if (stat_config.cgroup_list) {
1085 pr_err("--cgroup and --for-each-cgroup cannot be used together\n");
1086 return -1;
1087 }
1088
1089 return parse_cgroups(opt, str, unset);
1090}
1091
1092static int parse_cputype(const struct option *opt,
1093 const char *str,
1094 int unset __maybe_unused)
1095{
1096 const struct perf_pmu *pmu;
1097 struct evlist *evlist = *(struct evlist **)opt->value;
1098
1099 if (!list_empty(&evlist->core.entries)) {
1100 fprintf(stderr, "Must define cputype before events/metrics\n");
1101 return -1;
1102 }
1103
1104 pmu = perf_pmus__pmu_for_pmu_filter(str);
1105 if (!pmu) {
1106 fprintf(stderr, "--cputype %s is not supported!\n", str);
1107 return -1;
1108 }
1109 parse_events_option_args.pmu_filter = pmu->name;
1110
1111 return 0;
1112}
1113
1114static int parse_cache_level(const struct option *opt,
1115 const char *str,
1116 int unset __maybe_unused)
1117{
1118 int level;
1119 u32 *aggr_mode = (u32 *)opt->value;
1120 u32 *aggr_level = (u32 *)opt->data;
1121
1122 /*
1123 * If no string is specified, aggregate based on the topology of
1124 * Last Level Cache (LLC). Since the LLC level can change from
1125 * architecture to architecture, set level greater than
1126 * MAX_CACHE_LVL which will be interpreted as LLC.
1127 */
1128 if (str == NULL) {
1129 level = MAX_CACHE_LVL + 1;
1130 goto out;
1131 }
1132
1133 /*
1134 * The format to specify cache level is LX or lX where X is the
1135 * cache level.
1136 */
1137 if (strlen(str) != 2 || (str[0] != 'l' && str[0] != 'L')) {
1138 pr_err("Cache level must be of form L[1-%d], or l[1-%d]\n",
1139 MAX_CACHE_LVL,
1140 MAX_CACHE_LVL);
1141 return -EINVAL;
1142 }
1143
1144 level = atoi(&str[1]);
1145 if (level < 1) {
1146 pr_err("Cache level must be of form L[1-%d], or l[1-%d]\n",
1147 MAX_CACHE_LVL,
1148 MAX_CACHE_LVL);
1149 return -EINVAL;
1150 }
1151
1152 if (level > MAX_CACHE_LVL) {
1153 pr_err("perf only supports max cache level of %d.\n"
1154 "Consider increasing MAX_CACHE_LVL\n", MAX_CACHE_LVL);
1155 return -EINVAL;
1156 }
1157out:
1158 *aggr_mode = AGGR_CACHE;
1159 *aggr_level = level;
1160 return 0;
1161}
1162
1163static struct option stat_options[] = {
1164 OPT_BOOLEAN('T', "transaction", &transaction_run,
1165 "hardware transaction statistics"),
1166 OPT_CALLBACK('e', "event", &parse_events_option_args, "event",
1167 "event selector. use 'perf list' to list available events",
1168 parse_events_option),
1169 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1170 "event filter", parse_filter),
1171 OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit,
1172 "child tasks do not inherit counters"),
1173 OPT_STRING('p', "pid", &target.pid, "pid",
1174 "stat events on existing process id"),
1175 OPT_STRING('t', "tid", &target.tid, "tid",
1176 "stat events on existing thread id"),
1177#ifdef HAVE_BPF_SKEL
1178 OPT_STRING('b', "bpf-prog", &target.bpf_str, "bpf-prog-id",
1179 "stat events on existing bpf program id"),
1180 OPT_BOOLEAN(0, "bpf-counters", &target.use_bpf,
1181 "use bpf program to count events"),
1182 OPT_STRING(0, "bpf-attr-map", &target.attr_map, "attr-map-path",
1183 "path to perf_event_attr map"),
1184#endif
1185 OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1186 "system-wide collection from all CPUs"),
1187 OPT_BOOLEAN(0, "scale", &stat_config.scale,
1188 "Use --no-scale to disable counter scaling for multiplexing"),
1189 OPT_INCR('v', "verbose", &verbose,
1190 "be more verbose (show counter open errors, etc)"),
1191 OPT_INTEGER('r', "repeat", &stat_config.run_count,
1192 "repeat command and print average + stddev (max: 100, forever: 0)"),
1193 OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table,
1194 "display details about each run (only with -r option)"),
1195 OPT_BOOLEAN('n', "null", &stat_config.null_run,
1196 "null run - dont start any counters"),
1197 OPT_INCR('d', "detailed", &detailed_run,
1198 "detailed run - start a lot of events"),
1199 OPT_BOOLEAN('S', "sync", &sync_run,
1200 "call sync() before starting a run"),
1201 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1202 "print large numbers with thousands\' separators",
1203 stat__set_big_num),
1204 OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1205 "list of cpus to monitor in system-wide"),
1206 OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
1207 "disable aggregation across CPUs or PMUs", AGGR_NONE),
1208 OPT_SET_UINT(0, "no-merge", &stat_config.aggr_mode,
1209 "disable aggregation the same as -A or -no-aggr", AGGR_NONE),
1210 OPT_BOOLEAN(0, "hybrid-merge", &stat_config.hybrid_merge,
1211 "Merge identical named hybrid events"),
1212 OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator",
1213 "print counts with custom separator"),
1214 OPT_BOOLEAN('j', "json-output", &stat_config.json_output,
1215 "print counts in JSON format"),
1216 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1217 "monitor event in cgroup name only", parse_stat_cgroups),
1218 OPT_STRING(0, "for-each-cgroup", &stat_config.cgroup_list, "name",
1219 "expand events for each cgroup"),
1220 OPT_STRING('o', "output", &output_name, "file", "output file name"),
1221 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1222 OPT_INTEGER(0, "log-fd", &output_fd,
1223 "log output to fd, instead of stderr"),
1224 OPT_STRING(0, "pre", &pre_cmd, "command",
1225 "command to run prior to the measured command"),
1226 OPT_STRING(0, "post", &post_cmd, "command",
1227 "command to run after to the measured command"),
1228 OPT_UINTEGER('I', "interval-print", &stat_config.interval,
1229 "print counts at regular interval in ms "
1230 "(overhead is possible for values <= 100ms)"),
1231 OPT_INTEGER(0, "interval-count", &stat_config.times,
1232 "print counts for fixed number of times"),
1233 OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear,
1234 "clear screen in between new interval"),
1235 OPT_UINTEGER(0, "timeout", &stat_config.timeout,
1236 "stop workload and print counts after a timeout period in ms (>= 10ms)"),
1237 OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
1238 "aggregate counts per processor socket", AGGR_SOCKET),
1239 OPT_SET_UINT(0, "per-die", &stat_config.aggr_mode,
1240 "aggregate counts per processor die", AGGR_DIE),
1241 OPT_CALLBACK_OPTARG(0, "per-cache", &stat_config.aggr_mode, &stat_config.aggr_level,
1242 "cache level", "aggregate count at this cache level (Default: LLC)",
1243 parse_cache_level),
1244 OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
1245 "aggregate counts per physical processor core", AGGR_CORE),
1246 OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
1247 "aggregate counts per thread", AGGR_THREAD),
1248 OPT_SET_UINT(0, "per-node", &stat_config.aggr_mode,
1249 "aggregate counts per numa node", AGGR_NODE),
1250 OPT_INTEGER('D', "delay", &target.initial_delay,
1251 "ms to wait before starting measurement after program start (-1: start with events disabled)"),
1252 OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL,
1253 "Only print computed metrics. No raw values", enable_metric_only),
1254 OPT_BOOLEAN(0, "metric-no-group", &stat_config.metric_no_group,
1255 "don't group metric events, impacts multiplexing"),
1256 OPT_BOOLEAN(0, "metric-no-merge", &stat_config.metric_no_merge,
1257 "don't try to share events between metrics in a group"),
1258 OPT_BOOLEAN(0, "metric-no-threshold", &stat_config.metric_no_threshold,
1259 "disable adding events for the metric threshold calculation"),
1260 OPT_BOOLEAN(0, "topdown", &topdown_run,
1261 "measure top-down statistics"),
1262 OPT_UINTEGER(0, "td-level", &stat_config.topdown_level,
1263 "Set the metrics level for the top-down statistics (0: max level)"),
1264 OPT_BOOLEAN(0, "smi-cost", &smi_cost,
1265 "measure SMI cost"),
1266 OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
1267 "monitor specified metrics or metric groups (separated by ,)",
1268 append_metric_groups),
1269 OPT_BOOLEAN_FLAG(0, "all-kernel", &stat_config.all_kernel,
1270 "Configure all used events to run in kernel space.",
1271 PARSE_OPT_EXCLUSIVE),
1272 OPT_BOOLEAN_FLAG(0, "all-user", &stat_config.all_user,
1273 "Configure all used events to run in user space.",
1274 PARSE_OPT_EXCLUSIVE),
1275 OPT_BOOLEAN(0, "percore-show-thread", &stat_config.percore_show_thread,
1276 "Use with 'percore' event qualifier to show the event "
1277 "counts of one hardware thread by sum up total hardware "
1278 "threads of same physical core"),
1279 OPT_BOOLEAN(0, "summary", &stat_config.summary,
1280 "print summary for interval mode"),
1281 OPT_BOOLEAN(0, "no-csv-summary", &stat_config.no_csv_summary,
1282 "don't print 'summary' for CSV summary output"),
1283 OPT_BOOLEAN(0, "quiet", &quiet,
1284 "don't print any output, messages or warnings (useful with record)"),
1285 OPT_CALLBACK(0, "cputype", &evsel_list, "hybrid cpu type",
1286 "Only enable events on applying cpu with this type "
1287 "for hybrid platform (e.g. core or atom)",
1288 parse_cputype),
1289#ifdef HAVE_LIBPFM
1290 OPT_CALLBACK(0, "pfm-events", &evsel_list, "event",
1291 "libpfm4 event selector. use 'perf list' to list available events",
1292 parse_libpfm_events_option),
1293#endif
1294 OPT_CALLBACK(0, "control", &stat_config, "fd:ctl-fd[,ack-fd] or fifo:ctl-fifo[,ack-fifo]",
1295 "Listen on ctl-fd descriptor for command to control measurement ('enable': enable events, 'disable': disable events).\n"
1296 "\t\t\t Optionally send control command completion ('ack\\n') to ack-fd descriptor.\n"
1297 "\t\t\t Alternatively, ctl-fifo / ack-fifo will be opened and used as ctl-fd / ack-fd.",
1298 parse_control_option),
1299 OPT_CALLBACK_OPTARG(0, "iostat", &evsel_list, &stat_config, "default",
1300 "measure I/O performance metrics provided by arch/platform",
1301 iostat_parse),
1302 OPT_END()
1303};
1304
1305/**
1306 * Calculate the cache instance ID from the map in
1307 * /sys/devices/system/cpu/cpuX/cache/indexY/shared_cpu_list
1308 * Cache instance ID is the first CPU reported in the shared_cpu_list file.
1309 */
1310static int cpu__get_cache_id_from_map(struct perf_cpu cpu, char *map)
1311{
1312 int id;
1313 struct perf_cpu_map *cpu_map = perf_cpu_map__new(map);
1314
1315 /*
1316 * If the map contains no CPU, consider the current CPU to
1317 * be the first online CPU in the cache domain else use the
1318 * first online CPU of the cache domain as the ID.
1319 */
1320 if (perf_cpu_map__has_any_cpu_or_is_empty(cpu_map))
1321 id = cpu.cpu;
1322 else
1323 id = perf_cpu_map__cpu(cpu_map, 0).cpu;
1324
1325 /* Free the perf_cpu_map used to find the cache ID */
1326 perf_cpu_map__put(cpu_map);
1327
1328 return id;
1329}
1330
1331/**
1332 * cpu__get_cache_id - Returns 0 if successful in populating the
1333 * cache level and cache id. Cache level is read from
1334 * /sys/devices/system/cpu/cpuX/cache/indexY/level where as cache instance ID
1335 * is the first CPU reported by
1336 * /sys/devices/system/cpu/cpuX/cache/indexY/shared_cpu_list
1337 */
1338static int cpu__get_cache_details(struct perf_cpu cpu, struct perf_cache *cache)
1339{
1340 int ret = 0;
1341 u32 cache_level = stat_config.aggr_level;
1342 struct cpu_cache_level caches[MAX_CACHE_LVL];
1343 u32 i = 0, caches_cnt = 0;
1344
1345 cache->cache_lvl = (cache_level > MAX_CACHE_LVL) ? 0 : cache_level;
1346 cache->cache = -1;
1347
1348 ret = build_caches_for_cpu(cpu.cpu, caches, &caches_cnt);
1349 if (ret) {
1350 /*
1351 * If caches_cnt is not 0, cpu_cache_level data
1352 * was allocated when building the topology.
1353 * Free the allocated data before returning.
1354 */
1355 if (caches_cnt)
1356 goto free_caches;
1357
1358 return ret;
1359 }
1360
1361 if (!caches_cnt)
1362 return -1;
1363
1364 /*
1365 * Save the data for the highest level if no
1366 * level was specified by the user.
1367 */
1368 if (cache_level > MAX_CACHE_LVL) {
1369 int max_level_index = 0;
1370
1371 for (i = 1; i < caches_cnt; ++i) {
1372 if (caches[i].level > caches[max_level_index].level)
1373 max_level_index = i;
1374 }
1375
1376 cache->cache_lvl = caches[max_level_index].level;
1377 cache->cache = cpu__get_cache_id_from_map(cpu, caches[max_level_index].map);
1378
1379 /* Reset i to 0 to free entire caches[] */
1380 i = 0;
1381 goto free_caches;
1382 }
1383
1384 for (i = 0; i < caches_cnt; ++i) {
1385 if (caches[i].level == cache_level) {
1386 cache->cache_lvl = cache_level;
1387 cache->cache = cpu__get_cache_id_from_map(cpu, caches[i].map);
1388 }
1389
1390 cpu_cache_level__free(&caches[i]);
1391 }
1392
1393free_caches:
1394 /*
1395 * Free all the allocated cpu_cache_level data.
1396 */
1397 while (i < caches_cnt)
1398 cpu_cache_level__free(&caches[i++]);
1399
1400 return ret;
1401}
1402
1403/**
1404 * aggr_cpu_id__cache - Create an aggr_cpu_id with cache instache ID, cache
1405 * level, die and socket populated with the cache instache ID, cache level,
1406 * die and socket for cpu. The function signature is compatible with
1407 * aggr_cpu_id_get_t.
1408 */
1409static struct aggr_cpu_id aggr_cpu_id__cache(struct perf_cpu cpu, void *data)
1410{
1411 int ret;
1412 struct aggr_cpu_id id;
1413 struct perf_cache cache;
1414
1415 id = aggr_cpu_id__die(cpu, data);
1416 if (aggr_cpu_id__is_empty(&id))
1417 return id;
1418
1419 ret = cpu__get_cache_details(cpu, &cache);
1420 if (ret)
1421 return id;
1422
1423 id.cache_lvl = cache.cache_lvl;
1424 id.cache = cache.cache;
1425 return id;
1426}
1427
1428static const char *const aggr_mode__string[] = {
1429 [AGGR_CORE] = "core",
1430 [AGGR_CACHE] = "cache",
1431 [AGGR_DIE] = "die",
1432 [AGGR_GLOBAL] = "global",
1433 [AGGR_NODE] = "node",
1434 [AGGR_NONE] = "none",
1435 [AGGR_SOCKET] = "socket",
1436 [AGGR_THREAD] = "thread",
1437 [AGGR_UNSET] = "unset",
1438};
1439
1440static struct aggr_cpu_id perf_stat__get_socket(struct perf_stat_config *config __maybe_unused,
1441 struct perf_cpu cpu)
1442{
1443 return aggr_cpu_id__socket(cpu, /*data=*/NULL);
1444}
1445
1446static struct aggr_cpu_id perf_stat__get_die(struct perf_stat_config *config __maybe_unused,
1447 struct perf_cpu cpu)
1448{
1449 return aggr_cpu_id__die(cpu, /*data=*/NULL);
1450}
1451
1452static struct aggr_cpu_id perf_stat__get_cache_id(struct perf_stat_config *config __maybe_unused,
1453 struct perf_cpu cpu)
1454{
1455 return aggr_cpu_id__cache(cpu, /*data=*/NULL);
1456}
1457
1458static struct aggr_cpu_id perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
1459 struct perf_cpu cpu)
1460{
1461 return aggr_cpu_id__core(cpu, /*data=*/NULL);
1462}
1463
1464static struct aggr_cpu_id perf_stat__get_node(struct perf_stat_config *config __maybe_unused,
1465 struct perf_cpu cpu)
1466{
1467 return aggr_cpu_id__node(cpu, /*data=*/NULL);
1468}
1469
1470static struct aggr_cpu_id perf_stat__get_global(struct perf_stat_config *config __maybe_unused,
1471 struct perf_cpu cpu)
1472{
1473 return aggr_cpu_id__global(cpu, /*data=*/NULL);
1474}
1475
1476static struct aggr_cpu_id perf_stat__get_cpu(struct perf_stat_config *config __maybe_unused,
1477 struct perf_cpu cpu)
1478{
1479 return aggr_cpu_id__cpu(cpu, /*data=*/NULL);
1480}
1481
1482static struct aggr_cpu_id perf_stat__get_aggr(struct perf_stat_config *config,
1483 aggr_get_id_t get_id, struct perf_cpu cpu)
1484{
1485 struct aggr_cpu_id id;
1486
1487 /* per-process mode - should use global aggr mode */
1488 if (cpu.cpu == -1)
1489 return get_id(config, cpu);
1490
1491 if (aggr_cpu_id__is_empty(&config->cpus_aggr_map->map[cpu.cpu]))
1492 config->cpus_aggr_map->map[cpu.cpu] = get_id(config, cpu);
1493
1494 id = config->cpus_aggr_map->map[cpu.cpu];
1495 return id;
1496}
1497
1498static struct aggr_cpu_id perf_stat__get_socket_cached(struct perf_stat_config *config,
1499 struct perf_cpu cpu)
1500{
1501 return perf_stat__get_aggr(config, perf_stat__get_socket, cpu);
1502}
1503
1504static struct aggr_cpu_id perf_stat__get_die_cached(struct perf_stat_config *config,
1505 struct perf_cpu cpu)
1506{
1507 return perf_stat__get_aggr(config, perf_stat__get_die, cpu);
1508}
1509
1510static struct aggr_cpu_id perf_stat__get_cache_id_cached(struct perf_stat_config *config,
1511 struct perf_cpu cpu)
1512{
1513 return perf_stat__get_aggr(config, perf_stat__get_cache_id, cpu);
1514}
1515
1516static struct aggr_cpu_id perf_stat__get_core_cached(struct perf_stat_config *config,
1517 struct perf_cpu cpu)
1518{
1519 return perf_stat__get_aggr(config, perf_stat__get_core, cpu);
1520}
1521
1522static struct aggr_cpu_id perf_stat__get_node_cached(struct perf_stat_config *config,
1523 struct perf_cpu cpu)
1524{
1525 return perf_stat__get_aggr(config, perf_stat__get_node, cpu);
1526}
1527
1528static struct aggr_cpu_id perf_stat__get_global_cached(struct perf_stat_config *config,
1529 struct perf_cpu cpu)
1530{
1531 return perf_stat__get_aggr(config, perf_stat__get_global, cpu);
1532}
1533
1534static struct aggr_cpu_id perf_stat__get_cpu_cached(struct perf_stat_config *config,
1535 struct perf_cpu cpu)
1536{
1537 return perf_stat__get_aggr(config, perf_stat__get_cpu, cpu);
1538}
1539
1540static aggr_cpu_id_get_t aggr_mode__get_aggr(enum aggr_mode aggr_mode)
1541{
1542 switch (aggr_mode) {
1543 case AGGR_SOCKET:
1544 return aggr_cpu_id__socket;
1545 case AGGR_DIE:
1546 return aggr_cpu_id__die;
1547 case AGGR_CACHE:
1548 return aggr_cpu_id__cache;
1549 case AGGR_CORE:
1550 return aggr_cpu_id__core;
1551 case AGGR_NODE:
1552 return aggr_cpu_id__node;
1553 case AGGR_NONE:
1554 return aggr_cpu_id__cpu;
1555 case AGGR_GLOBAL:
1556 return aggr_cpu_id__global;
1557 case AGGR_THREAD:
1558 case AGGR_UNSET:
1559 case AGGR_MAX:
1560 default:
1561 return NULL;
1562 }
1563}
1564
1565static aggr_get_id_t aggr_mode__get_id(enum aggr_mode aggr_mode)
1566{
1567 switch (aggr_mode) {
1568 case AGGR_SOCKET:
1569 return perf_stat__get_socket_cached;
1570 case AGGR_DIE:
1571 return perf_stat__get_die_cached;
1572 case AGGR_CACHE:
1573 return perf_stat__get_cache_id_cached;
1574 case AGGR_CORE:
1575 return perf_stat__get_core_cached;
1576 case AGGR_NODE:
1577 return perf_stat__get_node_cached;
1578 case AGGR_NONE:
1579 return perf_stat__get_cpu_cached;
1580 case AGGR_GLOBAL:
1581 return perf_stat__get_global_cached;
1582 case AGGR_THREAD:
1583 case AGGR_UNSET:
1584 case AGGR_MAX:
1585 default:
1586 return NULL;
1587 }
1588}
1589
1590static int perf_stat_init_aggr_mode(void)
1591{
1592 int nr;
1593 aggr_cpu_id_get_t get_id = aggr_mode__get_aggr(stat_config.aggr_mode);
1594
1595 if (get_id) {
1596 bool needs_sort = stat_config.aggr_mode != AGGR_NONE;
1597 stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.user_requested_cpus,
1598 get_id, /*data=*/NULL, needs_sort);
1599 if (!stat_config.aggr_map) {
1600 pr_err("cannot build %s map\n", aggr_mode__string[stat_config.aggr_mode]);
1601 return -1;
1602 }
1603 stat_config.aggr_get_id = aggr_mode__get_id(stat_config.aggr_mode);
1604 }
1605
1606 if (stat_config.aggr_mode == AGGR_THREAD) {
1607 nr = perf_thread_map__nr(evsel_list->core.threads);
1608 stat_config.aggr_map = cpu_aggr_map__empty_new(nr);
1609 if (stat_config.aggr_map == NULL)
1610 return -ENOMEM;
1611
1612 for (int s = 0; s < nr; s++) {
1613 struct aggr_cpu_id id = aggr_cpu_id__empty();
1614
1615 id.thread_idx = s;
1616 stat_config.aggr_map->map[s] = id;
1617 }
1618 return 0;
1619 }
1620
1621 /*
1622 * The evsel_list->cpus is the base we operate on,
1623 * taking the highest cpu number to be the size of
1624 * the aggregation translate cpumap.
1625 */
1626 if (!perf_cpu_map__has_any_cpu_or_is_empty(evsel_list->core.user_requested_cpus))
1627 nr = perf_cpu_map__max(evsel_list->core.user_requested_cpus).cpu;
1628 else
1629 nr = 0;
1630 stat_config.cpus_aggr_map = cpu_aggr_map__empty_new(nr + 1);
1631 return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
1632}
1633
1634static void cpu_aggr_map__delete(struct cpu_aggr_map *map)
1635{
1636 if (map) {
1637 WARN_ONCE(refcount_read(&map->refcnt) != 0,
1638 "cpu_aggr_map refcnt unbalanced\n");
1639 free(map);
1640 }
1641}
1642
1643static void cpu_aggr_map__put(struct cpu_aggr_map *map)
1644{
1645 if (map && refcount_dec_and_test(&map->refcnt))
1646 cpu_aggr_map__delete(map);
1647}
1648
1649static void perf_stat__exit_aggr_mode(void)
1650{
1651 cpu_aggr_map__put(stat_config.aggr_map);
1652 cpu_aggr_map__put(stat_config.cpus_aggr_map);
1653 stat_config.aggr_map = NULL;
1654 stat_config.cpus_aggr_map = NULL;
1655}
1656
1657static struct aggr_cpu_id perf_env__get_socket_aggr_by_cpu(struct perf_cpu cpu, void *data)
1658{
1659 struct perf_env *env = data;
1660 struct aggr_cpu_id id = aggr_cpu_id__empty();
1661
1662 if (cpu.cpu != -1)
1663 id.socket = env->cpu[cpu.cpu].socket_id;
1664
1665 return id;
1666}
1667
1668static struct aggr_cpu_id perf_env__get_die_aggr_by_cpu(struct perf_cpu cpu, void *data)
1669{
1670 struct perf_env *env = data;
1671 struct aggr_cpu_id id = aggr_cpu_id__empty();
1672
1673 if (cpu.cpu != -1) {
1674 /*
1675 * die_id is relative to socket, so start
1676 * with the socket ID and then add die to
1677 * make a unique ID.
1678 */
1679 id.socket = env->cpu[cpu.cpu].socket_id;
1680 id.die = env->cpu[cpu.cpu].die_id;
1681 }
1682
1683 return id;
1684}
1685
1686static void perf_env__get_cache_id_for_cpu(struct perf_cpu cpu, struct perf_env *env,
1687 u32 cache_level, struct aggr_cpu_id *id)
1688{
1689 int i;
1690 int caches_cnt = env->caches_cnt;
1691 struct cpu_cache_level *caches = env->caches;
1692
1693 id->cache_lvl = (cache_level > MAX_CACHE_LVL) ? 0 : cache_level;
1694 id->cache = -1;
1695
1696 if (!caches_cnt)
1697 return;
1698
1699 for (i = caches_cnt - 1; i > -1; --i) {
1700 struct perf_cpu_map *cpu_map;
1701 int map_contains_cpu;
1702
1703 /*
1704 * If user has not specified a level, find the fist level with
1705 * the cpu in the map. Since building the map is expensive, do
1706 * this only if levels match.
1707 */
1708 if (cache_level <= MAX_CACHE_LVL && caches[i].level != cache_level)
1709 continue;
1710
1711 cpu_map = perf_cpu_map__new(caches[i].map);
1712 map_contains_cpu = perf_cpu_map__idx(cpu_map, cpu);
1713 perf_cpu_map__put(cpu_map);
1714
1715 if (map_contains_cpu != -1) {
1716 id->cache_lvl = caches[i].level;
1717 id->cache = cpu__get_cache_id_from_map(cpu, caches[i].map);
1718 return;
1719 }
1720 }
1721}
1722
1723static struct aggr_cpu_id perf_env__get_cache_aggr_by_cpu(struct perf_cpu cpu,
1724 void *data)
1725{
1726 struct perf_env *env = data;
1727 struct aggr_cpu_id id = aggr_cpu_id__empty();
1728
1729 if (cpu.cpu != -1) {
1730 u32 cache_level = (perf_stat.aggr_level) ?: stat_config.aggr_level;
1731
1732 id.socket = env->cpu[cpu.cpu].socket_id;
1733 id.die = env->cpu[cpu.cpu].die_id;
1734 perf_env__get_cache_id_for_cpu(cpu, env, cache_level, &id);
1735 }
1736
1737 return id;
1738}
1739
1740static struct aggr_cpu_id perf_env__get_core_aggr_by_cpu(struct perf_cpu cpu, void *data)
1741{
1742 struct perf_env *env = data;
1743 struct aggr_cpu_id id = aggr_cpu_id__empty();
1744
1745 if (cpu.cpu != -1) {
1746 /*
1747 * core_id is relative to socket and die,
1748 * we need a global id. So we set
1749 * socket, die id and core id
1750 */
1751 id.socket = env->cpu[cpu.cpu].socket_id;
1752 id.die = env->cpu[cpu.cpu].die_id;
1753 id.core = env->cpu[cpu.cpu].core_id;
1754 }
1755
1756 return id;
1757}
1758
1759static struct aggr_cpu_id perf_env__get_cpu_aggr_by_cpu(struct perf_cpu cpu, void *data)
1760{
1761 struct perf_env *env = data;
1762 struct aggr_cpu_id id = aggr_cpu_id__empty();
1763
1764 if (cpu.cpu != -1) {
1765 /*
1766 * core_id is relative to socket and die,
1767 * we need a global id. So we set
1768 * socket, die id and core id
1769 */
1770 id.socket = env->cpu[cpu.cpu].socket_id;
1771 id.die = env->cpu[cpu.cpu].die_id;
1772 id.core = env->cpu[cpu.cpu].core_id;
1773 id.cpu = cpu;
1774 }
1775
1776 return id;
1777}
1778
1779static struct aggr_cpu_id perf_env__get_node_aggr_by_cpu(struct perf_cpu cpu, void *data)
1780{
1781 struct aggr_cpu_id id = aggr_cpu_id__empty();
1782
1783 id.node = perf_env__numa_node(data, cpu);
1784 return id;
1785}
1786
1787static struct aggr_cpu_id perf_env__get_global_aggr_by_cpu(struct perf_cpu cpu __maybe_unused,
1788 void *data __maybe_unused)
1789{
1790 struct aggr_cpu_id id = aggr_cpu_id__empty();
1791
1792 /* it always aggregates to the cpu 0 */
1793 id.cpu = (struct perf_cpu){ .cpu = 0 };
1794 return id;
1795}
1796
1797static struct aggr_cpu_id perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused,
1798 struct perf_cpu cpu)
1799{
1800 return perf_env__get_socket_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1801}
1802static struct aggr_cpu_id perf_stat__get_die_file(struct perf_stat_config *config __maybe_unused,
1803 struct perf_cpu cpu)
1804{
1805 return perf_env__get_die_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1806}
1807
1808static struct aggr_cpu_id perf_stat__get_cache_file(struct perf_stat_config *config __maybe_unused,
1809 struct perf_cpu cpu)
1810{
1811 return perf_env__get_cache_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1812}
1813
1814static struct aggr_cpu_id perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused,
1815 struct perf_cpu cpu)
1816{
1817 return perf_env__get_core_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1818}
1819
1820static struct aggr_cpu_id perf_stat__get_cpu_file(struct perf_stat_config *config __maybe_unused,
1821 struct perf_cpu cpu)
1822{
1823 return perf_env__get_cpu_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1824}
1825
1826static struct aggr_cpu_id perf_stat__get_node_file(struct perf_stat_config *config __maybe_unused,
1827 struct perf_cpu cpu)
1828{
1829 return perf_env__get_node_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1830}
1831
1832static struct aggr_cpu_id perf_stat__get_global_file(struct perf_stat_config *config __maybe_unused,
1833 struct perf_cpu cpu)
1834{
1835 return perf_env__get_global_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1836}
1837
1838static aggr_cpu_id_get_t aggr_mode__get_aggr_file(enum aggr_mode aggr_mode)
1839{
1840 switch (aggr_mode) {
1841 case AGGR_SOCKET:
1842 return perf_env__get_socket_aggr_by_cpu;
1843 case AGGR_DIE:
1844 return perf_env__get_die_aggr_by_cpu;
1845 case AGGR_CACHE:
1846 return perf_env__get_cache_aggr_by_cpu;
1847 case AGGR_CORE:
1848 return perf_env__get_core_aggr_by_cpu;
1849 case AGGR_NODE:
1850 return perf_env__get_node_aggr_by_cpu;
1851 case AGGR_GLOBAL:
1852 return perf_env__get_global_aggr_by_cpu;
1853 case AGGR_NONE:
1854 return perf_env__get_cpu_aggr_by_cpu;
1855 case AGGR_THREAD:
1856 case AGGR_UNSET:
1857 case AGGR_MAX:
1858 default:
1859 return NULL;
1860 }
1861}
1862
1863static aggr_get_id_t aggr_mode__get_id_file(enum aggr_mode aggr_mode)
1864{
1865 switch (aggr_mode) {
1866 case AGGR_SOCKET:
1867 return perf_stat__get_socket_file;
1868 case AGGR_DIE:
1869 return perf_stat__get_die_file;
1870 case AGGR_CACHE:
1871 return perf_stat__get_cache_file;
1872 case AGGR_CORE:
1873 return perf_stat__get_core_file;
1874 case AGGR_NODE:
1875 return perf_stat__get_node_file;
1876 case AGGR_GLOBAL:
1877 return perf_stat__get_global_file;
1878 case AGGR_NONE:
1879 return perf_stat__get_cpu_file;
1880 case AGGR_THREAD:
1881 case AGGR_UNSET:
1882 case AGGR_MAX:
1883 default:
1884 return NULL;
1885 }
1886}
1887
1888static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
1889{
1890 struct perf_env *env = &st->session->header.env;
1891 aggr_cpu_id_get_t get_id = aggr_mode__get_aggr_file(stat_config.aggr_mode);
1892 bool needs_sort = stat_config.aggr_mode != AGGR_NONE;
1893
1894 if (stat_config.aggr_mode == AGGR_THREAD) {
1895 int nr = perf_thread_map__nr(evsel_list->core.threads);
1896
1897 stat_config.aggr_map = cpu_aggr_map__empty_new(nr);
1898 if (stat_config.aggr_map == NULL)
1899 return -ENOMEM;
1900
1901 for (int s = 0; s < nr; s++) {
1902 struct aggr_cpu_id id = aggr_cpu_id__empty();
1903
1904 id.thread_idx = s;
1905 stat_config.aggr_map->map[s] = id;
1906 }
1907 return 0;
1908 }
1909
1910 if (!get_id)
1911 return 0;
1912
1913 stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.user_requested_cpus,
1914 get_id, env, needs_sort);
1915 if (!stat_config.aggr_map) {
1916 pr_err("cannot build %s map\n", aggr_mode__string[stat_config.aggr_mode]);
1917 return -1;
1918 }
1919 stat_config.aggr_get_id = aggr_mode__get_id_file(stat_config.aggr_mode);
1920 return 0;
1921}
1922
1923/*
1924 * Add default attributes, if there were no attributes specified or
1925 * if -d/--detailed, -d -d or -d -d -d is used:
1926 */
1927static int add_default_attributes(void)
1928{
1929 struct perf_event_attr default_attrs0[] = {
1930
1931 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK },
1932 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES },
1933 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS },
1934 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS },
1935
1936 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES },
1937};
1938 struct perf_event_attr frontend_attrs[] = {
1939 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1940};
1941 struct perf_event_attr backend_attrs[] = {
1942 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND },
1943};
1944 struct perf_event_attr default_attrs1[] = {
1945 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS },
1946 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS },
1947 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES },
1948
1949};
1950
1951/*
1952 * Detailed stats (-d), covering the L1 and last level data caches:
1953 */
1954 struct perf_event_attr detailed_attrs[] = {
1955
1956 { .type = PERF_TYPE_HW_CACHE,
1957 .config =
1958 PERF_COUNT_HW_CACHE_L1D << 0 |
1959 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1960 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1961
1962 { .type = PERF_TYPE_HW_CACHE,
1963 .config =
1964 PERF_COUNT_HW_CACHE_L1D << 0 |
1965 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1966 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1967
1968 { .type = PERF_TYPE_HW_CACHE,
1969 .config =
1970 PERF_COUNT_HW_CACHE_LL << 0 |
1971 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1972 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1973
1974 { .type = PERF_TYPE_HW_CACHE,
1975 .config =
1976 PERF_COUNT_HW_CACHE_LL << 0 |
1977 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1978 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1979};
1980
1981/*
1982 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1983 */
1984 struct perf_event_attr very_detailed_attrs[] = {
1985
1986 { .type = PERF_TYPE_HW_CACHE,
1987 .config =
1988 PERF_COUNT_HW_CACHE_L1I << 0 |
1989 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1990 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
1991
1992 { .type = PERF_TYPE_HW_CACHE,
1993 .config =
1994 PERF_COUNT_HW_CACHE_L1I << 0 |
1995 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
1996 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
1997
1998 { .type = PERF_TYPE_HW_CACHE,
1999 .config =
2000 PERF_COUNT_HW_CACHE_DTLB << 0 |
2001 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
2002 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
2003
2004 { .type = PERF_TYPE_HW_CACHE,
2005 .config =
2006 PERF_COUNT_HW_CACHE_DTLB << 0 |
2007 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
2008 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
2009
2010 { .type = PERF_TYPE_HW_CACHE,
2011 .config =
2012 PERF_COUNT_HW_CACHE_ITLB << 0 |
2013 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
2014 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
2015
2016 { .type = PERF_TYPE_HW_CACHE,
2017 .config =
2018 PERF_COUNT_HW_CACHE_ITLB << 0 |
2019 (PERF_COUNT_HW_CACHE_OP_READ << 8) |
2020 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
2021
2022};
2023
2024/*
2025 * Very, very detailed stats (-d -d -d), adding prefetch events:
2026 */
2027 struct perf_event_attr very_very_detailed_attrs[] = {
2028
2029 { .type = PERF_TYPE_HW_CACHE,
2030 .config =
2031 PERF_COUNT_HW_CACHE_L1D << 0 |
2032 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
2033 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) },
2034
2035 { .type = PERF_TYPE_HW_CACHE,
2036 .config =
2037 PERF_COUNT_HW_CACHE_L1D << 0 |
2038 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) |
2039 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) },
2040};
2041
2042 struct perf_event_attr default_null_attrs[] = {};
2043 const char *pmu = parse_events_option_args.pmu_filter ?: "all";
2044
2045 /* Set attrs if no event is selected and !null_run: */
2046 if (stat_config.null_run)
2047 return 0;
2048
2049 if (transaction_run) {
2050 /* Handle -T as -M transaction. Once platform specific metrics
2051 * support has been added to the json files, all architectures
2052 * will use this approach. To determine transaction support
2053 * on an architecture test for such a metric name.
2054 */
2055 if (!metricgroup__has_metric(pmu, "transaction")) {
2056 pr_err("Missing transaction metrics\n");
2057 return -1;
2058 }
2059 return metricgroup__parse_groups(evsel_list, pmu, "transaction",
2060 stat_config.metric_no_group,
2061 stat_config.metric_no_merge,
2062 stat_config.metric_no_threshold,
2063 stat_config.user_requested_cpu_list,
2064 stat_config.system_wide,
2065 &stat_config.metric_events);
2066 }
2067
2068 if (smi_cost) {
2069 int smi;
2070
2071 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
2072 pr_err("freeze_on_smi is not supported.\n");
2073 return -1;
2074 }
2075
2076 if (!smi) {
2077 if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) {
2078 fprintf(stderr, "Failed to set freeze_on_smi.\n");
2079 return -1;
2080 }
2081 smi_reset = true;
2082 }
2083
2084 if (!metricgroup__has_metric(pmu, "smi")) {
2085 pr_err("Missing smi metrics\n");
2086 return -1;
2087 }
2088
2089 if (!force_metric_only)
2090 stat_config.metric_only = true;
2091
2092 return metricgroup__parse_groups(evsel_list, pmu, "smi",
2093 stat_config.metric_no_group,
2094 stat_config.metric_no_merge,
2095 stat_config.metric_no_threshold,
2096 stat_config.user_requested_cpu_list,
2097 stat_config.system_wide,
2098 &stat_config.metric_events);
2099 }
2100
2101 if (topdown_run) {
2102 unsigned int max_level = metricgroups__topdown_max_level();
2103 char str[] = "TopdownL1";
2104
2105 if (!force_metric_only)
2106 stat_config.metric_only = true;
2107
2108 if (!max_level) {
2109 pr_err("Topdown requested but the topdown metric groups aren't present.\n"
2110 "(See perf list the metric groups have names like TopdownL1)\n");
2111 return -1;
2112 }
2113 if (stat_config.topdown_level > max_level) {
2114 pr_err("Invalid top-down metrics level. The max level is %u.\n", max_level);
2115 return -1;
2116 } else if (!stat_config.topdown_level)
2117 stat_config.topdown_level = 1;
2118
2119 if (!stat_config.interval && !stat_config.metric_only) {
2120 fprintf(stat_config.output,
2121 "Topdown accuracy may decrease when measuring long periods.\n"
2122 "Please print the result regularly, e.g. -I1000\n");
2123 }
2124 str[8] = stat_config.topdown_level + '0';
2125 if (metricgroup__parse_groups(evsel_list,
2126 pmu, str,
2127 /*metric_no_group=*/false,
2128 /*metric_no_merge=*/false,
2129 /*metric_no_threshold=*/true,
2130 stat_config.user_requested_cpu_list,
2131 stat_config.system_wide,
2132 &stat_config.metric_events) < 0)
2133 return -1;
2134 }
2135
2136 if (!stat_config.topdown_level)
2137 stat_config.topdown_level = 1;
2138
2139 if (!evsel_list->core.nr_entries) {
2140 /* No events so add defaults. */
2141 if (target__has_cpu(&target))
2142 default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
2143
2144 if (evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
2145 return -1;
2146 if (perf_pmus__have_event("cpu", "stalled-cycles-frontend")) {
2147 if (evlist__add_default_attrs(evsel_list, frontend_attrs) < 0)
2148 return -1;
2149 }
2150 if (perf_pmus__have_event("cpu", "stalled-cycles-backend")) {
2151 if (evlist__add_default_attrs(evsel_list, backend_attrs) < 0)
2152 return -1;
2153 }
2154 if (evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
2155 return -1;
2156 /*
2157 * Add TopdownL1 metrics if they exist. To minimize
2158 * multiplexing, don't request threshold computation.
2159 */
2160 if (metricgroup__has_metric(pmu, "Default")) {
2161 struct evlist *metric_evlist = evlist__new();
2162 struct evsel *metric_evsel;
2163
2164 if (!metric_evlist)
2165 return -1;
2166
2167 if (metricgroup__parse_groups(metric_evlist, pmu, "Default",
2168 /*metric_no_group=*/false,
2169 /*metric_no_merge=*/false,
2170 /*metric_no_threshold=*/true,
2171 stat_config.user_requested_cpu_list,
2172 stat_config.system_wide,
2173 &stat_config.metric_events) < 0)
2174 return -1;
2175
2176 evlist__for_each_entry(metric_evlist, metric_evsel) {
2177 metric_evsel->skippable = true;
2178 metric_evsel->default_metricgroup = true;
2179 }
2180 evlist__splice_list_tail(evsel_list, &metric_evlist->core.entries);
2181 evlist__delete(metric_evlist);
2182 }
2183
2184 /* Platform specific attrs */
2185 if (evlist__add_default_attrs(evsel_list, default_null_attrs) < 0)
2186 return -1;
2187 }
2188
2189 /* Detailed events get appended to the event list: */
2190
2191 if (detailed_run < 1)
2192 return 0;
2193
2194 /* Append detailed run extra attributes: */
2195 if (evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
2196 return -1;
2197
2198 if (detailed_run < 2)
2199 return 0;
2200
2201 /* Append very detailed run extra attributes: */
2202 if (evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
2203 return -1;
2204
2205 if (detailed_run < 3)
2206 return 0;
2207
2208 /* Append very, very detailed run extra attributes: */
2209 return evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
2210}
2211
2212static const char * const stat_record_usage[] = {
2213 "perf stat record [<options>]",
2214 NULL,
2215};
2216
2217static void init_features(struct perf_session *session)
2218{
2219 int feat;
2220
2221 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
2222 perf_header__set_feat(&session->header, feat);
2223
2224 perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT);
2225 perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
2226 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
2227 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
2228 perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
2229}
2230
2231static int __cmd_record(int argc, const char **argv)
2232{
2233 struct perf_session *session;
2234 struct perf_data *data = &perf_stat.data;
2235
2236 argc = parse_options(argc, argv, stat_options, stat_record_usage,
2237 PARSE_OPT_STOP_AT_NON_OPTION);
2238
2239 if (output_name)
2240 data->path = output_name;
2241
2242 if (stat_config.run_count != 1 || forever) {
2243 pr_err("Cannot use -r option with perf stat record.\n");
2244 return -1;
2245 }
2246
2247 session = perf_session__new(data, NULL);
2248 if (IS_ERR(session)) {
2249 pr_err("Perf session creation failed\n");
2250 return PTR_ERR(session);
2251 }
2252
2253 init_features(session);
2254
2255 session->evlist = evsel_list;
2256 perf_stat.session = session;
2257 perf_stat.record = true;
2258 return argc;
2259}
2260
2261static int process_stat_round_event(struct perf_session *session,
2262 union perf_event *event)
2263{
2264 struct perf_record_stat_round *stat_round = &event->stat_round;
2265 struct timespec tsh, *ts = NULL;
2266 const char **argv = session->header.env.cmdline_argv;
2267 int argc = session->header.env.nr_cmdline;
2268
2269 process_counters();
2270
2271 if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
2272 update_stats(&walltime_nsecs_stats, stat_round->time);
2273
2274 if (stat_config.interval && stat_round->time) {
2275 tsh.tv_sec = stat_round->time / NSEC_PER_SEC;
2276 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
2277 ts = &tsh;
2278 }
2279
2280 print_counters(ts, argc, argv);
2281 return 0;
2282}
2283
2284static
2285int process_stat_config_event(struct perf_session *session,
2286 union perf_event *event)
2287{
2288 struct perf_tool *tool = session->tool;
2289 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2290
2291 perf_event__read_stat_config(&stat_config, &event->stat_config);
2292
2293 if (perf_cpu_map__has_any_cpu_or_is_empty(st->cpus)) {
2294 if (st->aggr_mode != AGGR_UNSET)
2295 pr_warning("warning: processing task data, aggregation mode not set\n");
2296 } else if (st->aggr_mode != AGGR_UNSET) {
2297 stat_config.aggr_mode = st->aggr_mode;
2298 }
2299
2300 if (perf_stat.data.is_pipe)
2301 perf_stat_init_aggr_mode();
2302 else
2303 perf_stat_init_aggr_mode_file(st);
2304
2305 if (stat_config.aggr_map) {
2306 int nr_aggr = stat_config.aggr_map->nr;
2307
2308 if (evlist__alloc_aggr_stats(session->evlist, nr_aggr) < 0) {
2309 pr_err("cannot allocate aggr counts\n");
2310 return -1;
2311 }
2312 }
2313 return 0;
2314}
2315
2316static int set_maps(struct perf_stat *st)
2317{
2318 if (!st->cpus || !st->threads)
2319 return 0;
2320
2321 if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
2322 return -EINVAL;
2323
2324 perf_evlist__set_maps(&evsel_list->core, st->cpus, st->threads);
2325
2326 if (evlist__alloc_stats(&stat_config, evsel_list, /*alloc_raw=*/true))
2327 return -ENOMEM;
2328
2329 st->maps_allocated = true;
2330 return 0;
2331}
2332
2333static
2334int process_thread_map_event(struct perf_session *session,
2335 union perf_event *event)
2336{
2337 struct perf_tool *tool = session->tool;
2338 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2339
2340 if (st->threads) {
2341 pr_warning("Extra thread map event, ignoring.\n");
2342 return 0;
2343 }
2344
2345 st->threads = thread_map__new_event(&event->thread_map);
2346 if (!st->threads)
2347 return -ENOMEM;
2348
2349 return set_maps(st);
2350}
2351
2352static
2353int process_cpu_map_event(struct perf_session *session,
2354 union perf_event *event)
2355{
2356 struct perf_tool *tool = session->tool;
2357 struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2358 struct perf_cpu_map *cpus;
2359
2360 if (st->cpus) {
2361 pr_warning("Extra cpu map event, ignoring.\n");
2362 return 0;
2363 }
2364
2365 cpus = cpu_map__new_data(&event->cpu_map.data);
2366 if (!cpus)
2367 return -ENOMEM;
2368
2369 st->cpus = cpus;
2370 return set_maps(st);
2371}
2372
2373static const char * const stat_report_usage[] = {
2374 "perf stat report [<options>]",
2375 NULL,
2376};
2377
2378static struct perf_stat perf_stat = {
2379 .tool = {
2380 .attr = perf_event__process_attr,
2381 .event_update = perf_event__process_event_update,
2382 .thread_map = process_thread_map_event,
2383 .cpu_map = process_cpu_map_event,
2384 .stat_config = process_stat_config_event,
2385 .stat = perf_event__process_stat_event,
2386 .stat_round = process_stat_round_event,
2387 },
2388 .aggr_mode = AGGR_UNSET,
2389 .aggr_level = 0,
2390};
2391
2392static int __cmd_report(int argc, const char **argv)
2393{
2394 struct perf_session *session;
2395 const struct option options[] = {
2396 OPT_STRING('i', "input", &input_name, "file", "input file name"),
2397 OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
2398 "aggregate counts per processor socket", AGGR_SOCKET),
2399 OPT_SET_UINT(0, "per-die", &perf_stat.aggr_mode,
2400 "aggregate counts per processor die", AGGR_DIE),
2401 OPT_CALLBACK_OPTARG(0, "per-cache", &perf_stat.aggr_mode, &perf_stat.aggr_level,
2402 "cache level",
2403 "aggregate count at this cache level (Default: LLC)",
2404 parse_cache_level),
2405 OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
2406 "aggregate counts per physical processor core", AGGR_CORE),
2407 OPT_SET_UINT(0, "per-node", &perf_stat.aggr_mode,
2408 "aggregate counts per numa node", AGGR_NODE),
2409 OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
2410 "disable CPU count aggregation", AGGR_NONE),
2411 OPT_END()
2412 };
2413 struct stat st;
2414 int ret;
2415
2416 argc = parse_options(argc, argv, options, stat_report_usage, 0);
2417
2418 if (!input_name || !strlen(input_name)) {
2419 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
2420 input_name = "-";
2421 else
2422 input_name = "perf.data";
2423 }
2424
2425 perf_stat.data.path = input_name;
2426 perf_stat.data.mode = PERF_DATA_MODE_READ;
2427
2428 session = perf_session__new(&perf_stat.data, &perf_stat.tool);
2429 if (IS_ERR(session))
2430 return PTR_ERR(session);
2431
2432 perf_stat.session = session;
2433 stat_config.output = stderr;
2434 evlist__delete(evsel_list);
2435 evsel_list = session->evlist;
2436
2437 ret = perf_session__process_events(session);
2438 if (ret)
2439 return ret;
2440
2441 perf_session__delete(session);
2442 return 0;
2443}
2444
2445static void setup_system_wide(int forks)
2446{
2447 /*
2448 * Make system wide (-a) the default target if
2449 * no target was specified and one of following
2450 * conditions is met:
2451 *
2452 * - there's no workload specified
2453 * - there is workload specified but all requested
2454 * events are system wide events
2455 */
2456 if (!target__none(&target))
2457 return;
2458
2459 if (!forks)
2460 target.system_wide = true;
2461 else {
2462 struct evsel *counter;
2463
2464 evlist__for_each_entry(evsel_list, counter) {
2465 if (!counter->core.requires_cpu &&
2466 !evsel__name_is(counter, "duration_time")) {
2467 return;
2468 }
2469 }
2470
2471 if (evsel_list->core.nr_entries)
2472 target.system_wide = true;
2473 }
2474}
2475
2476int cmd_stat(int argc, const char **argv)
2477{
2478 const char * const stat_usage[] = {
2479 "perf stat [<options>] [<command>]",
2480 NULL
2481 };
2482 int status = -EINVAL, run_idx, err;
2483 const char *mode;
2484 FILE *output = stderr;
2485 unsigned int interval, timeout;
2486 const char * const stat_subcommands[] = { "record", "report" };
2487 char errbuf[BUFSIZ];
2488
2489 setlocale(LC_ALL, "");
2490
2491 evsel_list = evlist__new();
2492 if (evsel_list == NULL)
2493 return -ENOMEM;
2494
2495 parse_events__shrink_config_terms();
2496
2497 /* String-parsing callback-based options would segfault when negated */
2498 set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG);
2499 set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG);
2500 set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG);
2501
2502 argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
2503 (const char **) stat_usage,
2504 PARSE_OPT_STOP_AT_NON_OPTION);
2505
2506 if (stat_config.csv_sep) {
2507 stat_config.csv_output = true;
2508 if (!strcmp(stat_config.csv_sep, "\\t"))
2509 stat_config.csv_sep = "\t";
2510 } else
2511 stat_config.csv_sep = DEFAULT_SEPARATOR;
2512
2513 if (argc && strlen(argv[0]) > 2 && strstarts("record", argv[0])) {
2514 argc = __cmd_record(argc, argv);
2515 if (argc < 0)
2516 return -1;
2517 } else if (argc && strlen(argv[0]) > 2 && strstarts("report", argv[0]))
2518 return __cmd_report(argc, argv);
2519
2520 interval = stat_config.interval;
2521 timeout = stat_config.timeout;
2522
2523 /*
2524 * For record command the -o is already taken care of.
2525 */
2526 if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
2527 output = NULL;
2528
2529 if (output_name && output_fd) {
2530 fprintf(stderr, "cannot use both --output and --log-fd\n");
2531 parse_options_usage(stat_usage, stat_options, "o", 1);
2532 parse_options_usage(NULL, stat_options, "log-fd", 0);
2533 goto out;
2534 }
2535
2536 if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) {
2537 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
2538 goto out;
2539 }
2540
2541 if (stat_config.metric_only && stat_config.run_count > 1) {
2542 fprintf(stderr, "--metric-only is not supported with -r\n");
2543 goto out;
2544 }
2545
2546 if (stat_config.walltime_run_table && stat_config.run_count <= 1) {
2547 fprintf(stderr, "--table is only supported with -r\n");
2548 parse_options_usage(stat_usage, stat_options, "r", 1);
2549 parse_options_usage(NULL, stat_options, "table", 0);
2550 goto out;
2551 }
2552
2553 if (output_fd < 0) {
2554 fprintf(stderr, "argument to --log-fd must be a > 0\n");
2555 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
2556 goto out;
2557 }
2558
2559 if (!output && !quiet) {
2560 struct timespec tm;
2561 mode = append_file ? "a" : "w";
2562
2563 output = fopen(output_name, mode);
2564 if (!output) {
2565 perror("failed to create output file");
2566 return -1;
2567 }
2568 if (!stat_config.json_output) {
2569 clock_gettime(CLOCK_REALTIME, &tm);
2570 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
2571 }
2572 } else if (output_fd > 0) {
2573 mode = append_file ? "a" : "w";
2574 output = fdopen(output_fd, mode);
2575 if (!output) {
2576 perror("Failed opening logfd");
2577 return -errno;
2578 }
2579 }
2580
2581 if (stat_config.interval_clear && !isatty(fileno(output))) {
2582 fprintf(stderr, "--interval-clear does not work with output\n");
2583 parse_options_usage(stat_usage, stat_options, "o", 1);
2584 parse_options_usage(NULL, stat_options, "log-fd", 0);
2585 parse_options_usage(NULL, stat_options, "interval-clear", 0);
2586 return -1;
2587 }
2588
2589 stat_config.output = output;
2590
2591 /*
2592 * let the spreadsheet do the pretty-printing
2593 */
2594 if (stat_config.csv_output) {
2595 /* User explicitly passed -B? */
2596 if (big_num_opt == 1) {
2597 fprintf(stderr, "-B option not supported with -x\n");
2598 parse_options_usage(stat_usage, stat_options, "B", 1);
2599 parse_options_usage(NULL, stat_options, "x", 1);
2600 goto out;
2601 } else /* Nope, so disable big number formatting */
2602 stat_config.big_num = false;
2603 } else if (big_num_opt == 0) /* User passed --no-big-num */
2604 stat_config.big_num = false;
2605
2606 err = target__validate(&target);
2607 if (err) {
2608 target__strerror(&target, err, errbuf, BUFSIZ);
2609 pr_warning("%s\n", errbuf);
2610 }
2611
2612 setup_system_wide(argc);
2613
2614 /*
2615 * Display user/system times only for single
2616 * run and when there's specified tracee.
2617 */
2618 if ((stat_config.run_count == 1) && target__none(&target))
2619 stat_config.ru_display = true;
2620
2621 if (stat_config.run_count < 0) {
2622 pr_err("Run count must be a positive number\n");
2623 parse_options_usage(stat_usage, stat_options, "r", 1);
2624 goto out;
2625 } else if (stat_config.run_count == 0) {
2626 forever = true;
2627 stat_config.run_count = 1;
2628 }
2629
2630 if (stat_config.walltime_run_table) {
2631 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0]));
2632 if (!stat_config.walltime_run) {
2633 pr_err("failed to setup -r option");
2634 goto out;
2635 }
2636 }
2637
2638 if ((stat_config.aggr_mode == AGGR_THREAD) &&
2639 !target__has_task(&target)) {
2640 if (!target.system_wide || target.cpu_list) {
2641 fprintf(stderr, "The --per-thread option is only "
2642 "available when monitoring via -p -t -a "
2643 "options or only --per-thread.\n");
2644 parse_options_usage(NULL, stat_options, "p", 1);
2645 parse_options_usage(NULL, stat_options, "t", 1);
2646 goto out;
2647 }
2648 }
2649
2650 /*
2651 * no_aggr, cgroup are for system-wide only
2652 * --per-thread is aggregated per thread, we dont mix it with cpu mode
2653 */
2654 if (((stat_config.aggr_mode != AGGR_GLOBAL &&
2655 stat_config.aggr_mode != AGGR_THREAD) ||
2656 (nr_cgroups || stat_config.cgroup_list)) &&
2657 !target__has_cpu(&target)) {
2658 fprintf(stderr, "both cgroup and no-aggregation "
2659 "modes only available in system-wide mode\n");
2660
2661 parse_options_usage(stat_usage, stat_options, "G", 1);
2662 parse_options_usage(NULL, stat_options, "A", 1);
2663 parse_options_usage(NULL, stat_options, "a", 1);
2664 parse_options_usage(NULL, stat_options, "for-each-cgroup", 0);
2665 goto out;
2666 }
2667
2668 if (stat_config.iostat_run) {
2669 status = iostat_prepare(evsel_list, &stat_config);
2670 if (status)
2671 goto out;
2672 if (iostat_mode == IOSTAT_LIST) {
2673 iostat_list(evsel_list, &stat_config);
2674 goto out;
2675 } else if (verbose > 0)
2676 iostat_list(evsel_list, &stat_config);
2677 if (iostat_mode == IOSTAT_RUN && !target__has_cpu(&target))
2678 target.system_wide = true;
2679 }
2680
2681 if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
2682 target.per_thread = true;
2683
2684 stat_config.system_wide = target.system_wide;
2685 if (target.cpu_list) {
2686 stat_config.user_requested_cpu_list = strdup(target.cpu_list);
2687 if (!stat_config.user_requested_cpu_list) {
2688 status = -ENOMEM;
2689 goto out;
2690 }
2691 }
2692
2693 /*
2694 * Metric parsing needs to be delayed as metrics may optimize events
2695 * knowing the target is system-wide.
2696 */
2697 if (metrics) {
2698 const char *pmu = parse_events_option_args.pmu_filter ?: "all";
2699 int ret = metricgroup__parse_groups(evsel_list, pmu, metrics,
2700 stat_config.metric_no_group,
2701 stat_config.metric_no_merge,
2702 stat_config.metric_no_threshold,
2703 stat_config.user_requested_cpu_list,
2704 stat_config.system_wide,
2705 &stat_config.metric_events);
2706
2707 zfree(&metrics);
2708 if (ret) {
2709 status = ret;
2710 goto out;
2711 }
2712 }
2713
2714 if (add_default_attributes())
2715 goto out;
2716
2717 if (stat_config.cgroup_list) {
2718 if (nr_cgroups > 0) {
2719 pr_err("--cgroup and --for-each-cgroup cannot be used together\n");
2720 parse_options_usage(stat_usage, stat_options, "G", 1);
2721 parse_options_usage(NULL, stat_options, "for-each-cgroup", 0);
2722 goto out;
2723 }
2724
2725 if (evlist__expand_cgroup(evsel_list, stat_config.cgroup_list,
2726 &stat_config.metric_events, true) < 0) {
2727 parse_options_usage(stat_usage, stat_options,
2728 "for-each-cgroup", 0);
2729 goto out;
2730 }
2731 }
2732
2733 evlist__warn_user_requested_cpus(evsel_list, target.cpu_list);
2734
2735 if (evlist__create_maps(evsel_list, &target) < 0) {
2736 if (target__has_task(&target)) {
2737 pr_err("Problems finding threads of monitor\n");
2738 parse_options_usage(stat_usage, stat_options, "p", 1);
2739 parse_options_usage(NULL, stat_options, "t", 1);
2740 } else if (target__has_cpu(&target)) {
2741 perror("failed to parse CPUs map");
2742 parse_options_usage(stat_usage, stat_options, "C", 1);
2743 parse_options_usage(NULL, stat_options, "a", 1);
2744 }
2745 goto out;
2746 }
2747
2748 evlist__check_cpu_maps(evsel_list);
2749
2750 /*
2751 * Initialize thread_map with comm names,
2752 * so we could print it out on output.
2753 */
2754 if (stat_config.aggr_mode == AGGR_THREAD) {
2755 thread_map__read_comms(evsel_list->core.threads);
2756 }
2757
2758 if (stat_config.aggr_mode == AGGR_NODE)
2759 cpu__setup_cpunode_map();
2760
2761 if (stat_config.times && interval)
2762 interval_count = true;
2763 else if (stat_config.times && !interval) {
2764 pr_err("interval-count option should be used together with "
2765 "interval-print.\n");
2766 parse_options_usage(stat_usage, stat_options, "interval-count", 0);
2767 parse_options_usage(stat_usage, stat_options, "I", 1);
2768 goto out;
2769 }
2770
2771 if (timeout && timeout < 100) {
2772 if (timeout < 10) {
2773 pr_err("timeout must be >= 10ms.\n");
2774 parse_options_usage(stat_usage, stat_options, "timeout", 0);
2775 goto out;
2776 } else
2777 pr_warning("timeout < 100ms. "
2778 "The overhead percentage could be high in some cases. "
2779 "Please proceed with caution.\n");
2780 }
2781 if (timeout && interval) {
2782 pr_err("timeout option is not supported with interval-print.\n");
2783 parse_options_usage(stat_usage, stat_options, "timeout", 0);
2784 parse_options_usage(stat_usage, stat_options, "I", 1);
2785 goto out;
2786 }
2787
2788 if (perf_stat_init_aggr_mode())
2789 goto out;
2790
2791 if (evlist__alloc_stats(&stat_config, evsel_list, interval))
2792 goto out;
2793
2794 /*
2795 * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
2796 * while avoiding that older tools show confusing messages.
2797 *
2798 * However for pipe sessions we need to keep it zero,
2799 * because script's perf_evsel__check_attr is triggered
2800 * by attr->sample_type != 0, and we can't run it on
2801 * stat sessions.
2802 */
2803 stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe);
2804
2805 /*
2806 * We dont want to block the signals - that would cause
2807 * child tasks to inherit that and Ctrl-C would not work.
2808 * What we want is for Ctrl-C to work in the exec()-ed
2809 * task, but being ignored by perf stat itself:
2810 */
2811 atexit(sig_atexit);
2812 if (!forever)
2813 signal(SIGINT, skip_signal);
2814 signal(SIGCHLD, skip_signal);
2815 signal(SIGALRM, skip_signal);
2816 signal(SIGABRT, skip_signal);
2817
2818 if (evlist__initialize_ctlfd(evsel_list, stat_config.ctl_fd, stat_config.ctl_fd_ack))
2819 goto out;
2820
2821 /* Enable ignoring missing threads when -p option is defined. */
2822 evlist__first(evsel_list)->ignore_missing_thread = target.pid;
2823 status = 0;
2824 for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) {
2825 if (stat_config.run_count != 1 && verbose > 0)
2826 fprintf(output, "[ perf stat: executing run #%d ... ]\n",
2827 run_idx + 1);
2828
2829 if (run_idx != 0)
2830 evlist__reset_prev_raw_counts(evsel_list);
2831
2832 status = run_perf_stat(argc, argv, run_idx);
2833 if (forever && status != -1 && !interval) {
2834 print_counters(NULL, argc, argv);
2835 perf_stat__reset_stats();
2836 }
2837 }
2838
2839 if (!forever && status != -1 && (!interval || stat_config.summary)) {
2840 if (stat_config.run_count > 1)
2841 evlist__copy_res_stats(&stat_config, evsel_list);
2842 print_counters(NULL, argc, argv);
2843 }
2844
2845 evlist__finalize_ctlfd(evsel_list);
2846
2847 if (STAT_RECORD) {
2848 /*
2849 * We synthesize the kernel mmap record just so that older tools
2850 * don't emit warnings about not being able to resolve symbols
2851 * due to /proc/sys/kernel/kptr_restrict settings and instead provide
2852 * a saner message about no samples being in the perf.data file.
2853 *
2854 * This also serves to suppress a warning about f_header.data.size == 0
2855 * in header.c at the moment 'perf stat record' gets introduced, which
2856 * is not really needed once we start adding the stat specific PERF_RECORD_
2857 * records, but the need to suppress the kptr_restrict messages in older
2858 * tools remain -acme
2859 */
2860 int fd = perf_data__fd(&perf_stat.data);
2861
2862 err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
2863 process_synthesized_event,
2864 &perf_stat.session->machines.host);
2865 if (err) {
2866 pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
2867 "older tools may produce warnings about this file\n.");
2868 }
2869
2870 if (!interval) {
2871 if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
2872 pr_err("failed to write stat round event\n");
2873 }
2874
2875 if (!perf_stat.data.is_pipe) {
2876 perf_stat.session->header.data_size += perf_stat.bytes_written;
2877 perf_session__write_header(perf_stat.session, evsel_list, fd, true);
2878 }
2879
2880 evlist__close(evsel_list);
2881 perf_session__delete(perf_stat.session);
2882 }
2883
2884 perf_stat__exit_aggr_mode();
2885 evlist__free_stats(evsel_list);
2886out:
2887 if (stat_config.iostat_run)
2888 iostat_release(evsel_list);
2889
2890 zfree(&stat_config.walltime_run);
2891 zfree(&stat_config.user_requested_cpu_list);
2892
2893 if (smi_cost && smi_reset)
2894 sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
2895
2896 evlist__delete(evsel_list);
2897
2898 metricgroup__rblist_exit(&stat_config.metric_events);
2899 evlist__close_control(stat_config.ctl_fd, stat_config.ctl_fd_ack, &stat_config.ctl_fd_close);
2900
2901 return status;
2902}