xref: /openbmc/linux/tools/perf/builtin-stat.c (revision d47a97bd)
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * builtin-stat.c
4  *
5  * Builtin stat command: Give a precise performance counters summary
6  * overview about any workload, CPU or specific PID.
7  *
8  * Sample output:
9 
10    $ perf stat ./hackbench 10
11 
12   Time: 0.118
13 
14   Performance counter stats for './hackbench 10':
15 
16        1708.761321 task-clock                #   11.037 CPUs utilized
17             41,190 context-switches          #    0.024 M/sec
18              6,735 CPU-migrations            #    0.004 M/sec
19             17,318 page-faults               #    0.010 M/sec
20      5,205,202,243 cycles                    #    3.046 GHz
21      3,856,436,920 stalled-cycles-frontend   #   74.09% frontend cycles idle
22      1,600,790,871 stalled-cycles-backend    #   30.75% backend  cycles idle
23      2,603,501,247 instructions              #    0.50  insns per cycle
24                                              #    1.48  stalled cycles per insn
25        484,357,498 branches                  #  283.455 M/sec
26          6,388,934 branch-misses             #    1.32% of all branches
27 
28         0.154822978  seconds time elapsed
29 
30  *
31  * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
32  *
33  * Improvements and fixes by:
34  *
35  *   Arjan van de Ven <arjan@linux.intel.com>
36  *   Yanmin Zhang <yanmin.zhang@intel.com>
37  *   Wu Fengguang <fengguang.wu@intel.com>
38  *   Mike Galbraith <efault@gmx.de>
39  *   Paul Mackerras <paulus@samba.org>
40  *   Jaswinder Singh Rajput <jaswinder@kernel.org>
41  */
42 
43 #include "builtin.h"
44 #include "perf.h"
45 #include "util/cgroup.h"
46 #include <subcmd/parse-options.h>
47 #include "util/parse-events.h"
48 #include "util/pmu.h"
49 #include "util/event.h"
50 #include "util/evlist.h"
51 #include "util/evlist-hybrid.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_map.h"
59 #include "util/counts.h"
60 #include "util/topdown.h"
61 #include "util/session.h"
62 #include "util/tool.h"
63 #include "util/string2.h"
64 #include "util/metricgroup.h"
65 #include "util/synthetic-events.h"
66 #include "util/target.h"
67 #include "util/time-utils.h"
68 #include "util/top.h"
69 #include "util/affinity.h"
70 #include "util/pfm.h"
71 #include "util/bpf_counter.h"
72 #include "util/iostat.h"
73 #include "util/pmu-hybrid.h"
74 #include "asm/bug.h"
75 
76 #include <linux/time64.h>
77 #include <linux/zalloc.h>
78 #include <api/fs/fs.h>
79 #include <errno.h>
80 #include <signal.h>
81 #include <stdlib.h>
82 #include <sys/prctl.h>
83 #include <inttypes.h>
84 #include <locale.h>
85 #include <math.h>
86 #include <sys/types.h>
87 #include <sys/stat.h>
88 #include <sys/wait.h>
89 #include <unistd.h>
90 #include <sys/time.h>
91 #include <sys/resource.h>
92 #include <linux/err.h>
93 
94 #include <linux/ctype.h>
95 #include <perf/evlist.h>
96 #include <internal/threadmap.h>
97 
98 #define DEFAULT_SEPARATOR	" "
99 #define FREEZE_ON_SMI_PATH	"devices/cpu/freeze_on_smi"
100 
101 static void print_counters(struct timespec *ts, int argc, const char **argv);
102 
103 /* Default events used for perf stat -T */
104 static const char *transaction_attrs = {
105 	"task-clock,"
106 	"{"
107 	"instructions,"
108 	"cycles,"
109 	"cpu/cycles-t/,"
110 	"cpu/tx-start/,"
111 	"cpu/el-start/,"
112 	"cpu/cycles-ct/"
113 	"}"
114 };
115 
116 /* More limited version when the CPU does not have all events. */
117 static const char * transaction_limited_attrs = {
118 	"task-clock,"
119 	"{"
120 	"instructions,"
121 	"cycles,"
122 	"cpu/cycles-t/,"
123 	"cpu/tx-start/"
124 	"}"
125 };
126 
127 static const char * topdown_attrs[] = {
128 	"topdown-total-slots",
129 	"topdown-slots-retired",
130 	"topdown-recovery-bubbles",
131 	"topdown-fetch-bubbles",
132 	"topdown-slots-issued",
133 	NULL,
134 };
135 
136 static const char *topdown_metric_attrs[] = {
137 	"slots",
138 	"topdown-retiring",
139 	"topdown-bad-spec",
140 	"topdown-fe-bound",
141 	"topdown-be-bound",
142 	NULL,
143 };
144 
145 static const char *topdown_metric_L2_attrs[] = {
146 	"slots",
147 	"topdown-retiring",
148 	"topdown-bad-spec",
149 	"topdown-fe-bound",
150 	"topdown-be-bound",
151 	"topdown-heavy-ops",
152 	"topdown-br-mispredict",
153 	"topdown-fetch-lat",
154 	"topdown-mem-bound",
155 	NULL,
156 };
157 
158 #define TOPDOWN_MAX_LEVEL			2
159 
160 static const char *smi_cost_attrs = {
161 	"{"
162 	"msr/aperf/,"
163 	"msr/smi/,"
164 	"cycles"
165 	"}"
166 };
167 
168 static struct evlist	*evsel_list;
169 static bool all_counters_use_bpf = true;
170 
171 static struct target target = {
172 	.uid	= UINT_MAX,
173 };
174 
175 #define METRIC_ONLY_LEN 20
176 
177 static volatile sig_atomic_t	child_pid			= -1;
178 static int			detailed_run			=  0;
179 static bool			transaction_run;
180 static bool			topdown_run			= false;
181 static bool			smi_cost			= false;
182 static bool			smi_reset			= false;
183 static int			big_num_opt			=  -1;
184 static const char		*pre_cmd			= NULL;
185 static const char		*post_cmd			= NULL;
186 static bool			sync_run			= false;
187 static bool			forever				= false;
188 static bool			force_metric_only		= false;
189 static struct timespec		ref_time;
190 static bool			append_file;
191 static bool			interval_count;
192 static const char		*output_name;
193 static int			output_fd;
194 static char			*metrics;
195 
196 struct perf_stat {
197 	bool			 record;
198 	struct perf_data	 data;
199 	struct perf_session	*session;
200 	u64			 bytes_written;
201 	struct perf_tool	 tool;
202 	bool			 maps_allocated;
203 	struct perf_cpu_map	*cpus;
204 	struct perf_thread_map *threads;
205 	enum aggr_mode		 aggr_mode;
206 };
207 
208 static struct perf_stat		perf_stat;
209 #define STAT_RECORD		perf_stat.record
210 
211 static volatile sig_atomic_t done = 0;
212 
213 static struct perf_stat_config stat_config = {
214 	.aggr_mode		= AGGR_GLOBAL,
215 	.scale			= true,
216 	.unit_width		= 4, /* strlen("unit") */
217 	.run_count		= 1,
218 	.metric_only_len	= METRIC_ONLY_LEN,
219 	.walltime_nsecs_stats	= &walltime_nsecs_stats,
220 	.ru_stats		= &ru_stats,
221 	.big_num		= true,
222 	.ctl_fd			= -1,
223 	.ctl_fd_ack		= -1,
224 	.iostat_run		= false,
225 };
226 
227 static bool cpus_map_matched(struct evsel *a, struct evsel *b)
228 {
229 	if (!a->core.cpus && !b->core.cpus)
230 		return true;
231 
232 	if (!a->core.cpus || !b->core.cpus)
233 		return false;
234 
235 	if (perf_cpu_map__nr(a->core.cpus) != perf_cpu_map__nr(b->core.cpus))
236 		return false;
237 
238 	for (int i = 0; i < perf_cpu_map__nr(a->core.cpus); i++) {
239 		if (perf_cpu_map__cpu(a->core.cpus, i).cpu !=
240 		    perf_cpu_map__cpu(b->core.cpus, i).cpu)
241 			return false;
242 	}
243 
244 	return true;
245 }
246 
247 static void evlist__check_cpu_maps(struct evlist *evlist)
248 {
249 	struct evsel *evsel, *pos, *leader;
250 	char buf[1024];
251 
252 	if (evlist__has_hybrid(evlist))
253 		evlist__warn_hybrid_group(evlist);
254 
255 	evlist__for_each_entry(evlist, evsel) {
256 		leader = evsel__leader(evsel);
257 
258 		/* Check that leader matches cpus with each member. */
259 		if (leader == evsel)
260 			continue;
261 		if (cpus_map_matched(leader, evsel))
262 			continue;
263 
264 		/* If there's mismatch disable the group and warn user. */
265 		WARN_ONCE(1, "WARNING: grouped events cpus do not match, disabling group:\n");
266 		evsel__group_desc(leader, buf, sizeof(buf));
267 		pr_warning("  %s\n", buf);
268 
269 		if (verbose > 0) {
270 			cpu_map__snprint(leader->core.cpus, buf, sizeof(buf));
271 			pr_warning("     %s: %s\n", leader->name, buf);
272 			cpu_map__snprint(evsel->core.cpus, buf, sizeof(buf));
273 			pr_warning("     %s: %s\n", evsel->name, buf);
274 		}
275 
276 		for_each_group_evsel(pos, leader)
277 			evsel__remove_from_group(pos, leader);
278 	}
279 }
280 
281 static inline void diff_timespec(struct timespec *r, struct timespec *a,
282 				 struct timespec *b)
283 {
284 	r->tv_sec = a->tv_sec - b->tv_sec;
285 	if (a->tv_nsec < b->tv_nsec) {
286 		r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
287 		r->tv_sec--;
288 	} else {
289 		r->tv_nsec = a->tv_nsec - b->tv_nsec ;
290 	}
291 }
292 
293 static void perf_stat__reset_stats(void)
294 {
295 	evlist__reset_stats(evsel_list);
296 	perf_stat__reset_shadow_stats();
297 }
298 
299 static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
300 				     union perf_event *event,
301 				     struct perf_sample *sample __maybe_unused,
302 				     struct machine *machine __maybe_unused)
303 {
304 	if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) {
305 		pr_err("failed to write perf data, error: %m\n");
306 		return -1;
307 	}
308 
309 	perf_stat.bytes_written += event->header.size;
310 	return 0;
311 }
312 
313 static int write_stat_round_event(u64 tm, u64 type)
314 {
315 	return perf_event__synthesize_stat_round(NULL, tm, type,
316 						 process_synthesized_event,
317 						 NULL);
318 }
319 
320 #define WRITE_STAT_ROUND_EVENT(time, interval) \
321 	write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
322 
323 #define SID(e, x, y) xyarray__entry(e->core.sample_id, x, y)
324 
325 static int evsel__write_stat_event(struct evsel *counter, int cpu_map_idx, u32 thread,
326 				   struct perf_counts_values *count)
327 {
328 	struct perf_sample_id *sid = SID(counter, cpu_map_idx, thread);
329 	struct perf_cpu cpu = perf_cpu_map__cpu(evsel__cpus(counter), cpu_map_idx);
330 
331 	return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
332 					   process_synthesized_event, NULL);
333 }
334 
335 static int read_single_counter(struct evsel *counter, int cpu_map_idx,
336 			       int thread, struct timespec *rs)
337 {
338 	switch(counter->tool_event) {
339 		case PERF_TOOL_DURATION_TIME: {
340 			u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL;
341 			struct perf_counts_values *count =
342 				perf_counts(counter->counts, cpu_map_idx, thread);
343 			count->ena = count->run = val;
344 			count->val = val;
345 			return 0;
346 		}
347 		case PERF_TOOL_USER_TIME:
348 		case PERF_TOOL_SYSTEM_TIME: {
349 			u64 val;
350 			struct perf_counts_values *count =
351 				perf_counts(counter->counts, cpu_map_idx, thread);
352 			if (counter->tool_event == PERF_TOOL_USER_TIME)
353 				val = ru_stats.ru_utime_usec_stat.mean;
354 			else
355 				val = ru_stats.ru_stime_usec_stat.mean;
356 			count->ena = count->run = val;
357 			count->val = val;
358 			return 0;
359 		}
360 		default:
361 		case PERF_TOOL_NONE:
362 			return evsel__read_counter(counter, cpu_map_idx, thread);
363 		case PERF_TOOL_MAX:
364 			/* This should never be reached */
365 			return 0;
366 	}
367 }
368 
369 /*
370  * Read out the results of a single counter:
371  * do not aggregate counts across CPUs in system-wide mode
372  */
373 static int read_counter_cpu(struct evsel *counter, struct timespec *rs, int cpu_map_idx)
374 {
375 	int nthreads = perf_thread_map__nr(evsel_list->core.threads);
376 	int thread;
377 
378 	if (!counter->supported)
379 		return -ENOENT;
380 
381 	for (thread = 0; thread < nthreads; thread++) {
382 		struct perf_counts_values *count;
383 
384 		count = perf_counts(counter->counts, cpu_map_idx, thread);
385 
386 		/*
387 		 * The leader's group read loads data into its group members
388 		 * (via evsel__read_counter()) and sets their count->loaded.
389 		 */
390 		if (!perf_counts__is_loaded(counter->counts, cpu_map_idx, thread) &&
391 		    read_single_counter(counter, cpu_map_idx, thread, rs)) {
392 			counter->counts->scaled = -1;
393 			perf_counts(counter->counts, cpu_map_idx, thread)->ena = 0;
394 			perf_counts(counter->counts, cpu_map_idx, thread)->run = 0;
395 			return -1;
396 		}
397 
398 		perf_counts__set_loaded(counter->counts, cpu_map_idx, thread, false);
399 
400 		if (STAT_RECORD) {
401 			if (evsel__write_stat_event(counter, cpu_map_idx, thread, count)) {
402 				pr_err("failed to write stat event\n");
403 				return -1;
404 			}
405 		}
406 
407 		if (verbose > 1) {
408 			fprintf(stat_config.output,
409 				"%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
410 					evsel__name(counter),
411 					perf_cpu_map__cpu(evsel__cpus(counter),
412 							  cpu_map_idx).cpu,
413 					count->val, count->ena, count->run);
414 		}
415 	}
416 
417 	return 0;
418 }
419 
420 static int read_affinity_counters(struct timespec *rs)
421 {
422 	struct evlist_cpu_iterator evlist_cpu_itr;
423 	struct affinity saved_affinity, *affinity;
424 
425 	if (all_counters_use_bpf)
426 		return 0;
427 
428 	if (!target__has_cpu(&target) || target__has_per_thread(&target))
429 		affinity = NULL;
430 	else if (affinity__setup(&saved_affinity) < 0)
431 		return -1;
432 	else
433 		affinity = &saved_affinity;
434 
435 	evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) {
436 		struct evsel *counter = evlist_cpu_itr.evsel;
437 
438 		if (evsel__is_bpf(counter))
439 			continue;
440 
441 		if (!counter->err) {
442 			counter->err = read_counter_cpu(counter, rs,
443 							evlist_cpu_itr.cpu_map_idx);
444 		}
445 	}
446 	if (affinity)
447 		affinity__cleanup(&saved_affinity);
448 
449 	return 0;
450 }
451 
452 static int read_bpf_map_counters(void)
453 {
454 	struct evsel *counter;
455 	int err;
456 
457 	evlist__for_each_entry(evsel_list, counter) {
458 		if (!evsel__is_bpf(counter))
459 			continue;
460 
461 		err = bpf_counter__read(counter);
462 		if (err)
463 			return err;
464 	}
465 	return 0;
466 }
467 
468 static int read_counters(struct timespec *rs)
469 {
470 	if (!stat_config.stop_read_counter) {
471 		if (read_bpf_map_counters() ||
472 		    read_affinity_counters(rs))
473 			return -1;
474 	}
475 	return 0;
476 }
477 
478 static void process_counters(void)
479 {
480 	struct evsel *counter;
481 
482 	evlist__for_each_entry(evsel_list, counter) {
483 		if (counter->err)
484 			pr_debug("failed to read counter %s\n", counter->name);
485 		if (counter->err == 0 && perf_stat_process_counter(&stat_config, counter))
486 			pr_warning("failed to process counter %s\n", counter->name);
487 		counter->err = 0;
488 	}
489 
490 	perf_stat_merge_counters(&stat_config, evsel_list);
491 	perf_stat_process_percore(&stat_config, evsel_list);
492 	perf_stat_process_shadow_stats(&stat_config, evsel_list);
493 }
494 
495 static void process_interval(void)
496 {
497 	struct timespec ts, rs;
498 
499 	clock_gettime(CLOCK_MONOTONIC, &ts);
500 	diff_timespec(&rs, &ts, &ref_time);
501 
502 	perf_stat__reset_shadow_per_stat(&rt_stat);
503 	evlist__reset_aggr_stats(evsel_list);
504 
505 	if (read_counters(&rs) == 0)
506 		process_counters();
507 
508 	if (STAT_RECORD) {
509 		if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
510 			pr_err("failed to write stat round event\n");
511 	}
512 
513 	init_stats(&walltime_nsecs_stats);
514 	update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000ULL);
515 	print_counters(&rs, 0, NULL);
516 }
517 
518 static bool handle_interval(unsigned int interval, int *times)
519 {
520 	if (interval) {
521 		process_interval();
522 		if (interval_count && !(--(*times)))
523 			return true;
524 	}
525 	return false;
526 }
527 
528 static int enable_counters(void)
529 {
530 	struct evsel *evsel;
531 	int err;
532 
533 	evlist__for_each_entry(evsel_list, evsel) {
534 		if (!evsel__is_bpf(evsel))
535 			continue;
536 
537 		err = bpf_counter__enable(evsel);
538 		if (err)
539 			return err;
540 	}
541 
542 	/*
543 	 * We need to enable counters only if:
544 	 * - we don't have tracee (attaching to task or cpu)
545 	 * - we have initial delay configured
546 	 */
547 	if (!target__none(&target)) {
548 		if (!all_counters_use_bpf)
549 			evlist__enable(evsel_list);
550 	}
551 	return 0;
552 }
553 
554 static void disable_counters(void)
555 {
556 	struct evsel *counter;
557 
558 	/*
559 	 * If we don't have tracee (attaching to task or cpu), counters may
560 	 * still be running. To get accurate group ratios, we must stop groups
561 	 * from counting before reading their constituent counters.
562 	 */
563 	if (!target__none(&target)) {
564 		evlist__for_each_entry(evsel_list, counter)
565 			bpf_counter__disable(counter);
566 		if (!all_counters_use_bpf)
567 			evlist__disable(evsel_list);
568 	}
569 }
570 
571 static volatile sig_atomic_t workload_exec_errno;
572 
573 /*
574  * evlist__prepare_workload will send a SIGUSR1
575  * if the fork fails, since we asked by setting its
576  * want_signal to true.
577  */
578 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
579 					void *ucontext __maybe_unused)
580 {
581 	workload_exec_errno = info->si_value.sival_int;
582 }
583 
584 static bool evsel__should_store_id(struct evsel *counter)
585 {
586 	return STAT_RECORD || counter->core.attr.read_format & PERF_FORMAT_ID;
587 }
588 
589 static bool is_target_alive(struct target *_target,
590 			    struct perf_thread_map *threads)
591 {
592 	struct stat st;
593 	int i;
594 
595 	if (!target__has_task(_target))
596 		return true;
597 
598 	for (i = 0; i < threads->nr; i++) {
599 		char path[PATH_MAX];
600 
601 		scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(),
602 			  threads->map[i].pid);
603 
604 		if (!stat(path, &st))
605 			return true;
606 	}
607 
608 	return false;
609 }
610 
611 static void process_evlist(struct evlist *evlist, unsigned int interval)
612 {
613 	enum evlist_ctl_cmd cmd = EVLIST_CTL_CMD_UNSUPPORTED;
614 
615 	if (evlist__ctlfd_process(evlist, &cmd) > 0) {
616 		switch (cmd) {
617 		case EVLIST_CTL_CMD_ENABLE:
618 			__fallthrough;
619 		case EVLIST_CTL_CMD_DISABLE:
620 			if (interval)
621 				process_interval();
622 			break;
623 		case EVLIST_CTL_CMD_SNAPSHOT:
624 		case EVLIST_CTL_CMD_ACK:
625 		case EVLIST_CTL_CMD_UNSUPPORTED:
626 		case EVLIST_CTL_CMD_EVLIST:
627 		case EVLIST_CTL_CMD_STOP:
628 		case EVLIST_CTL_CMD_PING:
629 		default:
630 			break;
631 		}
632 	}
633 }
634 
635 static void compute_tts(struct timespec *time_start, struct timespec *time_stop,
636 			int *time_to_sleep)
637 {
638 	int tts = *time_to_sleep;
639 	struct timespec time_diff;
640 
641 	diff_timespec(&time_diff, time_stop, time_start);
642 
643 	tts -= time_diff.tv_sec * MSEC_PER_SEC +
644 	       time_diff.tv_nsec / NSEC_PER_MSEC;
645 
646 	if (tts < 0)
647 		tts = 0;
648 
649 	*time_to_sleep = tts;
650 }
651 
652 static int dispatch_events(bool forks, int timeout, int interval, int *times)
653 {
654 	int child_exited = 0, status = 0;
655 	int time_to_sleep, sleep_time;
656 	struct timespec time_start, time_stop;
657 
658 	if (interval)
659 		sleep_time = interval;
660 	else if (timeout)
661 		sleep_time = timeout;
662 	else
663 		sleep_time = 1000;
664 
665 	time_to_sleep = sleep_time;
666 
667 	while (!done) {
668 		if (forks)
669 			child_exited = waitpid(child_pid, &status, WNOHANG);
670 		else
671 			child_exited = !is_target_alive(&target, evsel_list->core.threads) ? 1 : 0;
672 
673 		if (child_exited)
674 			break;
675 
676 		clock_gettime(CLOCK_MONOTONIC, &time_start);
677 		if (!(evlist__poll(evsel_list, time_to_sleep) > 0)) { /* poll timeout or EINTR */
678 			if (timeout || handle_interval(interval, times))
679 				break;
680 			time_to_sleep = sleep_time;
681 		} else { /* fd revent */
682 			process_evlist(evsel_list, interval);
683 			clock_gettime(CLOCK_MONOTONIC, &time_stop);
684 			compute_tts(&time_start, &time_stop, &time_to_sleep);
685 		}
686 	}
687 
688 	return status;
689 }
690 
691 enum counter_recovery {
692 	COUNTER_SKIP,
693 	COUNTER_RETRY,
694 	COUNTER_FATAL,
695 };
696 
697 static enum counter_recovery stat_handle_error(struct evsel *counter)
698 {
699 	char msg[BUFSIZ];
700 	/*
701 	 * PPC returns ENXIO for HW counters until 2.6.37
702 	 * (behavior changed with commit b0a873e).
703 	 */
704 	if (errno == EINVAL || errno == ENOSYS ||
705 	    errno == ENOENT || errno == EOPNOTSUPP ||
706 	    errno == ENXIO) {
707 		if (verbose > 0)
708 			ui__warning("%s event is not supported by the kernel.\n",
709 				    evsel__name(counter));
710 		counter->supported = false;
711 		/*
712 		 * errored is a sticky flag that means one of the counter's
713 		 * cpu event had a problem and needs to be reexamined.
714 		 */
715 		counter->errored = true;
716 
717 		if ((evsel__leader(counter) != counter) ||
718 		    !(counter->core.leader->nr_members > 1))
719 			return COUNTER_SKIP;
720 	} else if (evsel__fallback(counter, errno, msg, sizeof(msg))) {
721 		if (verbose > 0)
722 			ui__warning("%s\n", msg);
723 		return COUNTER_RETRY;
724 	} else if (target__has_per_thread(&target) &&
725 		   evsel_list->core.threads &&
726 		   evsel_list->core.threads->err_thread != -1) {
727 		/*
728 		 * For global --per-thread case, skip current
729 		 * error thread.
730 		 */
731 		if (!thread_map__remove(evsel_list->core.threads,
732 					evsel_list->core.threads->err_thread)) {
733 			evsel_list->core.threads->err_thread = -1;
734 			return COUNTER_RETRY;
735 		}
736 	}
737 
738 	evsel__open_strerror(counter, &target, errno, msg, sizeof(msg));
739 	ui__error("%s\n", msg);
740 
741 	if (child_pid != -1)
742 		kill(child_pid, SIGTERM);
743 	return COUNTER_FATAL;
744 }
745 
746 static int __run_perf_stat(int argc, const char **argv, int run_idx)
747 {
748 	int interval = stat_config.interval;
749 	int times = stat_config.times;
750 	int timeout = stat_config.timeout;
751 	char msg[BUFSIZ];
752 	unsigned long long t0, t1;
753 	struct evsel *counter;
754 	size_t l;
755 	int status = 0;
756 	const bool forks = (argc > 0);
757 	bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false;
758 	struct evlist_cpu_iterator evlist_cpu_itr;
759 	struct affinity saved_affinity, *affinity = NULL;
760 	int err;
761 	bool second_pass = false;
762 
763 	if (forks) {
764 		if (evlist__prepare_workload(evsel_list, &target, argv, is_pipe, workload_exec_failed_signal) < 0) {
765 			perror("failed to prepare workload");
766 			return -1;
767 		}
768 		child_pid = evsel_list->workload.pid;
769 	}
770 
771 	if (!cpu_map__is_dummy(evsel_list->core.user_requested_cpus)) {
772 		if (affinity__setup(&saved_affinity) < 0)
773 			return -1;
774 		affinity = &saved_affinity;
775 	}
776 
777 	evlist__for_each_entry(evsel_list, counter) {
778 		counter->reset_group = false;
779 		if (bpf_counter__load(counter, &target))
780 			return -1;
781 		if (!evsel__is_bpf(counter))
782 			all_counters_use_bpf = false;
783 	}
784 
785 	evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) {
786 		counter = evlist_cpu_itr.evsel;
787 
788 		/*
789 		 * bperf calls evsel__open_per_cpu() in bperf__load(), so
790 		 * no need to call it again here.
791 		 */
792 		if (target.use_bpf)
793 			break;
794 
795 		if (counter->reset_group || counter->errored)
796 			continue;
797 		if (evsel__is_bpf(counter))
798 			continue;
799 try_again:
800 		if (create_perf_stat_counter(counter, &stat_config, &target,
801 					     evlist_cpu_itr.cpu_map_idx) < 0) {
802 
803 			/*
804 			 * Weak group failed. We cannot just undo this here
805 			 * because earlier CPUs might be in group mode, and the kernel
806 			 * doesn't support mixing group and non group reads. Defer
807 			 * it to later.
808 			 * Don't close here because we're in the wrong affinity.
809 			 */
810 			if ((errno == EINVAL || errno == EBADF) &&
811 				evsel__leader(counter) != counter &&
812 				counter->weak_group) {
813 				evlist__reset_weak_group(evsel_list, counter, false);
814 				assert(counter->reset_group);
815 				second_pass = true;
816 				continue;
817 			}
818 
819 			switch (stat_handle_error(counter)) {
820 			case COUNTER_FATAL:
821 				return -1;
822 			case COUNTER_RETRY:
823 				goto try_again;
824 			case COUNTER_SKIP:
825 				continue;
826 			default:
827 				break;
828 			}
829 
830 		}
831 		counter->supported = true;
832 	}
833 
834 	if (second_pass) {
835 		/*
836 		 * Now redo all the weak group after closing them,
837 		 * and also close errored counters.
838 		 */
839 
840 		/* First close errored or weak retry */
841 		evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) {
842 			counter = evlist_cpu_itr.evsel;
843 
844 			if (!counter->reset_group && !counter->errored)
845 				continue;
846 
847 			perf_evsel__close_cpu(&counter->core, evlist_cpu_itr.cpu_map_idx);
848 		}
849 		/* Now reopen weak */
850 		evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) {
851 			counter = evlist_cpu_itr.evsel;
852 
853 			if (!counter->reset_group)
854 				continue;
855 try_again_reset:
856 			pr_debug2("reopening weak %s\n", evsel__name(counter));
857 			if (create_perf_stat_counter(counter, &stat_config, &target,
858 						     evlist_cpu_itr.cpu_map_idx) < 0) {
859 
860 				switch (stat_handle_error(counter)) {
861 				case COUNTER_FATAL:
862 					return -1;
863 				case COUNTER_RETRY:
864 					goto try_again_reset;
865 				case COUNTER_SKIP:
866 					continue;
867 				default:
868 					break;
869 				}
870 			}
871 			counter->supported = true;
872 		}
873 	}
874 	affinity__cleanup(affinity);
875 
876 	evlist__for_each_entry(evsel_list, counter) {
877 		if (!counter->supported) {
878 			perf_evsel__free_fd(&counter->core);
879 			continue;
880 		}
881 
882 		l = strlen(counter->unit);
883 		if (l > stat_config.unit_width)
884 			stat_config.unit_width = l;
885 
886 		if (evsel__should_store_id(counter) &&
887 		    evsel__store_ids(counter, evsel_list))
888 			return -1;
889 	}
890 
891 	if (evlist__apply_filters(evsel_list, &counter)) {
892 		pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
893 			counter->filter, evsel__name(counter), errno,
894 			str_error_r(errno, msg, sizeof(msg)));
895 		return -1;
896 	}
897 
898 	if (STAT_RECORD) {
899 		int fd = perf_data__fd(&perf_stat.data);
900 
901 		if (is_pipe) {
902 			err = perf_header__write_pipe(perf_data__fd(&perf_stat.data));
903 		} else {
904 			err = perf_session__write_header(perf_stat.session, evsel_list,
905 							 fd, false);
906 		}
907 
908 		if (err < 0)
909 			return err;
910 
911 		err = perf_event__synthesize_stat_events(&stat_config, NULL, evsel_list,
912 							 process_synthesized_event, is_pipe);
913 		if (err < 0)
914 			return err;
915 	}
916 
917 	if (stat_config.initial_delay) {
918 		pr_info(EVLIST_DISABLED_MSG);
919 	} else {
920 		err = enable_counters();
921 		if (err)
922 			return -1;
923 	}
924 
925 	/* Exec the command, if any */
926 	if (forks)
927 		evlist__start_workload(evsel_list);
928 
929 	if (stat_config.initial_delay > 0) {
930 		usleep(stat_config.initial_delay * USEC_PER_MSEC);
931 		err = enable_counters();
932 		if (err)
933 			return -1;
934 
935 		pr_info(EVLIST_ENABLED_MSG);
936 	}
937 
938 	t0 = rdclock();
939 	clock_gettime(CLOCK_MONOTONIC, &ref_time);
940 
941 	if (forks) {
942 		if (interval || timeout || evlist__ctlfd_initialized(evsel_list))
943 			status = dispatch_events(forks, timeout, interval, &times);
944 		if (child_pid != -1) {
945 			if (timeout)
946 				kill(child_pid, SIGTERM);
947 			wait4(child_pid, &status, 0, &stat_config.ru_data);
948 		}
949 
950 		if (workload_exec_errno) {
951 			const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
952 			pr_err("Workload failed: %s\n", emsg);
953 			return -1;
954 		}
955 
956 		if (WIFSIGNALED(status))
957 			psignal(WTERMSIG(status), argv[0]);
958 	} else {
959 		status = dispatch_events(forks, timeout, interval, &times);
960 	}
961 
962 	disable_counters();
963 
964 	t1 = rdclock();
965 
966 	if (stat_config.walltime_run_table)
967 		stat_config.walltime_run[run_idx] = t1 - t0;
968 
969 	if (interval && stat_config.summary) {
970 		stat_config.interval = 0;
971 		stat_config.stop_read_counter = true;
972 		init_stats(&walltime_nsecs_stats);
973 		update_stats(&walltime_nsecs_stats, t1 - t0);
974 
975 		evlist__copy_prev_raw_counts(evsel_list);
976 		evlist__reset_prev_raw_counts(evsel_list);
977 		evlist__reset_aggr_stats(evsel_list);
978 		perf_stat__reset_shadow_per_stat(&rt_stat);
979 	} else {
980 		update_stats(&walltime_nsecs_stats, t1 - t0);
981 		update_rusage_stats(&ru_stats, &stat_config.ru_data);
982 	}
983 
984 	/*
985 	 * Closing a group leader splits the group, and as we only disable
986 	 * group leaders, results in remaining events becoming enabled. To
987 	 * avoid arbitrary skew, we must read all counters before closing any
988 	 * group leaders.
989 	 */
990 	if (read_counters(&(struct timespec) { .tv_nsec = t1-t0 }) == 0)
991 		process_counters();
992 
993 	/*
994 	 * We need to keep evsel_list alive, because it's processed
995 	 * later the evsel_list will be closed after.
996 	 */
997 	if (!STAT_RECORD)
998 		evlist__close(evsel_list);
999 
1000 	return WEXITSTATUS(status);
1001 }
1002 
1003 static int run_perf_stat(int argc, const char **argv, int run_idx)
1004 {
1005 	int ret;
1006 
1007 	if (pre_cmd) {
1008 		ret = system(pre_cmd);
1009 		if (ret)
1010 			return ret;
1011 	}
1012 
1013 	if (sync_run)
1014 		sync();
1015 
1016 	ret = __run_perf_stat(argc, argv, run_idx);
1017 	if (ret)
1018 		return ret;
1019 
1020 	if (post_cmd) {
1021 		ret = system(post_cmd);
1022 		if (ret)
1023 			return ret;
1024 	}
1025 
1026 	return ret;
1027 }
1028 
1029 static void print_counters(struct timespec *ts, int argc, const char **argv)
1030 {
1031 	/* Do not print anything if we record to the pipe. */
1032 	if (STAT_RECORD && perf_stat.data.is_pipe)
1033 		return;
1034 	if (quiet)
1035 		return;
1036 
1037 	evlist__print_counters(evsel_list, &stat_config, &target, ts, argc, argv);
1038 }
1039 
1040 static volatile sig_atomic_t signr = -1;
1041 
1042 static void skip_signal(int signo)
1043 {
1044 	if ((child_pid == -1) || stat_config.interval)
1045 		done = 1;
1046 
1047 	signr = signo;
1048 	/*
1049 	 * render child_pid harmless
1050 	 * won't send SIGTERM to a random
1051 	 * process in case of race condition
1052 	 * and fast PID recycling
1053 	 */
1054 	child_pid = -1;
1055 }
1056 
1057 static void sig_atexit(void)
1058 {
1059 	sigset_t set, oset;
1060 
1061 	/*
1062 	 * avoid race condition with SIGCHLD handler
1063 	 * in skip_signal() which is modifying child_pid
1064 	 * goal is to avoid send SIGTERM to a random
1065 	 * process
1066 	 */
1067 	sigemptyset(&set);
1068 	sigaddset(&set, SIGCHLD);
1069 	sigprocmask(SIG_BLOCK, &set, &oset);
1070 
1071 	if (child_pid != -1)
1072 		kill(child_pid, SIGTERM);
1073 
1074 	sigprocmask(SIG_SETMASK, &oset, NULL);
1075 
1076 	if (signr == -1)
1077 		return;
1078 
1079 	signal(signr, SIG_DFL);
1080 	kill(getpid(), signr);
1081 }
1082 
1083 void perf_stat__set_big_num(int set)
1084 {
1085 	stat_config.big_num = (set != 0);
1086 }
1087 
1088 void perf_stat__set_no_csv_summary(int set)
1089 {
1090 	stat_config.no_csv_summary = (set != 0);
1091 }
1092 
1093 static int stat__set_big_num(const struct option *opt __maybe_unused,
1094 			     const char *s __maybe_unused, int unset)
1095 {
1096 	big_num_opt = unset ? 0 : 1;
1097 	perf_stat__set_big_num(!unset);
1098 	return 0;
1099 }
1100 
1101 static int enable_metric_only(const struct option *opt __maybe_unused,
1102 			      const char *s __maybe_unused, int unset)
1103 {
1104 	force_metric_only = true;
1105 	stat_config.metric_only = !unset;
1106 	return 0;
1107 }
1108 
1109 static int append_metric_groups(const struct option *opt __maybe_unused,
1110 			       const char *str,
1111 			       int unset __maybe_unused)
1112 {
1113 	if (metrics) {
1114 		char *tmp;
1115 
1116 		if (asprintf(&tmp, "%s,%s", metrics, str) < 0)
1117 			return -ENOMEM;
1118 		free(metrics);
1119 		metrics = tmp;
1120 	} else {
1121 		metrics = strdup(str);
1122 		if (!metrics)
1123 			return -ENOMEM;
1124 	}
1125 	return 0;
1126 }
1127 
1128 static int parse_control_option(const struct option *opt,
1129 				const char *str,
1130 				int unset __maybe_unused)
1131 {
1132 	struct perf_stat_config *config = opt->value;
1133 
1134 	return evlist__parse_control(str, &config->ctl_fd, &config->ctl_fd_ack, &config->ctl_fd_close);
1135 }
1136 
1137 static int parse_stat_cgroups(const struct option *opt,
1138 			      const char *str, int unset)
1139 {
1140 	if (stat_config.cgroup_list) {
1141 		pr_err("--cgroup and --for-each-cgroup cannot be used together\n");
1142 		return -1;
1143 	}
1144 
1145 	return parse_cgroups(opt, str, unset);
1146 }
1147 
1148 static int parse_hybrid_type(const struct option *opt,
1149 			     const char *str,
1150 			     int unset __maybe_unused)
1151 {
1152 	struct evlist *evlist = *(struct evlist **)opt->value;
1153 
1154 	if (!list_empty(&evlist->core.entries)) {
1155 		fprintf(stderr, "Must define cputype before events/metrics\n");
1156 		return -1;
1157 	}
1158 
1159 	evlist->hybrid_pmu_name = perf_pmu__hybrid_type_to_pmu(str);
1160 	if (!evlist->hybrid_pmu_name) {
1161 		fprintf(stderr, "--cputype %s is not supported!\n", str);
1162 		return -1;
1163 	}
1164 
1165 	return 0;
1166 }
1167 
1168 static struct option stat_options[] = {
1169 	OPT_BOOLEAN('T', "transaction", &transaction_run,
1170 		    "hardware transaction statistics"),
1171 	OPT_CALLBACK('e', "event", &evsel_list, "event",
1172 		     "event selector. use 'perf list' to list available events",
1173 		     parse_events_option),
1174 	OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1175 		     "event filter", parse_filter),
1176 	OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit,
1177 		    "child tasks do not inherit counters"),
1178 	OPT_STRING('p', "pid", &target.pid, "pid",
1179 		   "stat events on existing process id"),
1180 	OPT_STRING('t', "tid", &target.tid, "tid",
1181 		   "stat events on existing thread id"),
1182 #ifdef HAVE_BPF_SKEL
1183 	OPT_STRING('b', "bpf-prog", &target.bpf_str, "bpf-prog-id",
1184 		   "stat events on existing bpf program id"),
1185 	OPT_BOOLEAN(0, "bpf-counters", &target.use_bpf,
1186 		    "use bpf program to count events"),
1187 	OPT_STRING(0, "bpf-attr-map", &target.attr_map, "attr-map-path",
1188 		   "path to perf_event_attr map"),
1189 #endif
1190 	OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1191 		    "system-wide collection from all CPUs"),
1192 	OPT_BOOLEAN(0, "scale", &stat_config.scale,
1193 		    "Use --no-scale to disable counter scaling for multiplexing"),
1194 	OPT_INCR('v', "verbose", &verbose,
1195 		    "be more verbose (show counter open errors, etc)"),
1196 	OPT_INTEGER('r', "repeat", &stat_config.run_count,
1197 		    "repeat command and print average + stddev (max: 100, forever: 0)"),
1198 	OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table,
1199 		    "display details about each run (only with -r option)"),
1200 	OPT_BOOLEAN('n', "null", &stat_config.null_run,
1201 		    "null run - dont start any counters"),
1202 	OPT_INCR('d', "detailed", &detailed_run,
1203 		    "detailed run - start a lot of events"),
1204 	OPT_BOOLEAN('S', "sync", &sync_run,
1205 		    "call sync() before starting a run"),
1206 	OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1207 			   "print large numbers with thousands\' separators",
1208 			   stat__set_big_num),
1209 	OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1210 		    "list of cpus to monitor in system-wide"),
1211 	OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
1212 		    "disable CPU count aggregation", AGGR_NONE),
1213 	OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"),
1214 	OPT_BOOLEAN(0, "hybrid-merge", &stat_config.hybrid_merge,
1215 		    "Merge identical named hybrid events"),
1216 	OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator",
1217 		   "print counts with custom separator"),
1218 	OPT_BOOLEAN('j', "json-output", &stat_config.json_output,
1219 		   "print counts in JSON format"),
1220 	OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1221 		     "monitor event in cgroup name only", parse_stat_cgroups),
1222 	OPT_STRING(0, "for-each-cgroup", &stat_config.cgroup_list, "name",
1223 		    "expand events for each cgroup"),
1224 	OPT_STRING('o', "output", &output_name, "file", "output file name"),
1225 	OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1226 	OPT_INTEGER(0, "log-fd", &output_fd,
1227 		    "log output to fd, instead of stderr"),
1228 	OPT_STRING(0, "pre", &pre_cmd, "command",
1229 			"command to run prior to the measured command"),
1230 	OPT_STRING(0, "post", &post_cmd, "command",
1231 			"command to run after to the measured command"),
1232 	OPT_UINTEGER('I', "interval-print", &stat_config.interval,
1233 		    "print counts at regular interval in ms "
1234 		    "(overhead is possible for values <= 100ms)"),
1235 	OPT_INTEGER(0, "interval-count", &stat_config.times,
1236 		    "print counts for fixed number of times"),
1237 	OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear,
1238 		    "clear screen in between new interval"),
1239 	OPT_UINTEGER(0, "timeout", &stat_config.timeout,
1240 		    "stop workload and print counts after a timeout period in ms (>= 10ms)"),
1241 	OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
1242 		     "aggregate counts per processor socket", AGGR_SOCKET),
1243 	OPT_SET_UINT(0, "per-die", &stat_config.aggr_mode,
1244 		     "aggregate counts per processor die", AGGR_DIE),
1245 	OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
1246 		     "aggregate counts per physical processor core", AGGR_CORE),
1247 	OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
1248 		     "aggregate counts per thread", AGGR_THREAD),
1249 	OPT_SET_UINT(0, "per-node", &stat_config.aggr_mode,
1250 		     "aggregate counts per numa node", AGGR_NODE),
1251 	OPT_INTEGER('D', "delay", &stat_config.initial_delay,
1252 		    "ms to wait before starting measurement after program start (-1: start with events disabled)"),
1253 	OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL,
1254 			"Only print computed metrics. No raw values", enable_metric_only),
1255 	OPT_BOOLEAN(0, "metric-no-group", &stat_config.metric_no_group,
1256 		       "don't group metric events, impacts multiplexing"),
1257 	OPT_BOOLEAN(0, "metric-no-merge", &stat_config.metric_no_merge,
1258 		       "don't try to share events between metrics in a group"),
1259 	OPT_BOOLEAN(0, "topdown", &topdown_run,
1260 			"measure top-down statistics"),
1261 	OPT_UINTEGER(0, "td-level", &stat_config.topdown_level,
1262 			"Set the metrics level for the top-down statistics (0: max level)"),
1263 	OPT_BOOLEAN(0, "smi-cost", &smi_cost,
1264 			"measure SMI cost"),
1265 	OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
1266 		     "monitor specified metrics or metric groups (separated by ,)",
1267 		     append_metric_groups),
1268 	OPT_BOOLEAN_FLAG(0, "all-kernel", &stat_config.all_kernel,
1269 			 "Configure all used events to run in kernel space.",
1270 			 PARSE_OPT_EXCLUSIVE),
1271 	OPT_BOOLEAN_FLAG(0, "all-user", &stat_config.all_user,
1272 			 "Configure all used events to run in user space.",
1273 			 PARSE_OPT_EXCLUSIVE),
1274 	OPT_BOOLEAN(0, "percore-show-thread", &stat_config.percore_show_thread,
1275 		    "Use with 'percore' event qualifier to show the event "
1276 		    "counts of one hardware thread by sum up total hardware "
1277 		    "threads of same physical core"),
1278 	OPT_BOOLEAN(0, "summary", &stat_config.summary,
1279 		       "print summary for interval mode"),
1280 	OPT_BOOLEAN(0, "no-csv-summary", &stat_config.no_csv_summary,
1281 		       "don't print 'summary' for CSV summary output"),
1282 	OPT_BOOLEAN(0, "quiet", &quiet,
1283 			"don't print any output, messages or warnings (useful with record)"),
1284 	OPT_CALLBACK(0, "cputype", &evsel_list, "hybrid cpu type",
1285 		     "Only enable events on applying cpu with this type "
1286 		     "for hybrid platform (e.g. core or atom)",
1287 		     parse_hybrid_type),
1288 #ifdef HAVE_LIBPFM
1289 	OPT_CALLBACK(0, "pfm-events", &evsel_list, "event",
1290 		"libpfm4 event selector. use 'perf list' to list available events",
1291 		parse_libpfm_events_option),
1292 #endif
1293 	OPT_CALLBACK(0, "control", &stat_config, "fd:ctl-fd[,ack-fd] or fifo:ctl-fifo[,ack-fifo]",
1294 		     "Listen on ctl-fd descriptor for command to control measurement ('enable': enable events, 'disable': disable events).\n"
1295 		     "\t\t\t  Optionally send control command completion ('ack\\n') to ack-fd descriptor.\n"
1296 		     "\t\t\t  Alternatively, ctl-fifo / ack-fifo will be opened and used as ctl-fd / ack-fd.",
1297 		      parse_control_option),
1298 	OPT_CALLBACK_OPTARG(0, "iostat", &evsel_list, &stat_config, "default",
1299 			    "measure I/O performance metrics provided by arch/platform",
1300 			    iostat_parse),
1301 	OPT_END()
1302 };
1303 
1304 static const char *const aggr_mode__string[] = {
1305 	[AGGR_CORE] = "core",
1306 	[AGGR_DIE] = "die",
1307 	[AGGR_GLOBAL] = "global",
1308 	[AGGR_NODE] = "node",
1309 	[AGGR_NONE] = "none",
1310 	[AGGR_SOCKET] = "socket",
1311 	[AGGR_THREAD] = "thread",
1312 	[AGGR_UNSET] = "unset",
1313 };
1314 
1315 static struct aggr_cpu_id perf_stat__get_socket(struct perf_stat_config *config __maybe_unused,
1316 						struct perf_cpu cpu)
1317 {
1318 	return aggr_cpu_id__socket(cpu, /*data=*/NULL);
1319 }
1320 
1321 static struct aggr_cpu_id perf_stat__get_die(struct perf_stat_config *config __maybe_unused,
1322 					     struct perf_cpu cpu)
1323 {
1324 	return aggr_cpu_id__die(cpu, /*data=*/NULL);
1325 }
1326 
1327 static struct aggr_cpu_id perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
1328 					      struct perf_cpu cpu)
1329 {
1330 	return aggr_cpu_id__core(cpu, /*data=*/NULL);
1331 }
1332 
1333 static struct aggr_cpu_id perf_stat__get_node(struct perf_stat_config *config __maybe_unused,
1334 					      struct perf_cpu cpu)
1335 {
1336 	return aggr_cpu_id__node(cpu, /*data=*/NULL);
1337 }
1338 
1339 static struct aggr_cpu_id perf_stat__get_global(struct perf_stat_config *config __maybe_unused,
1340 						struct perf_cpu cpu)
1341 {
1342 	return aggr_cpu_id__global(cpu, /*data=*/NULL);
1343 }
1344 
1345 static struct aggr_cpu_id perf_stat__get_cpu(struct perf_stat_config *config __maybe_unused,
1346 					     struct perf_cpu cpu)
1347 {
1348 	return aggr_cpu_id__cpu(cpu, /*data=*/NULL);
1349 }
1350 
1351 static struct aggr_cpu_id perf_stat__get_aggr(struct perf_stat_config *config,
1352 					      aggr_get_id_t get_id, struct perf_cpu cpu)
1353 {
1354 	struct aggr_cpu_id id;
1355 
1356 	/* per-process mode - should use global aggr mode */
1357 	if (cpu.cpu == -1)
1358 		return get_id(config, cpu);
1359 
1360 	if (aggr_cpu_id__is_empty(&config->cpus_aggr_map->map[cpu.cpu]))
1361 		config->cpus_aggr_map->map[cpu.cpu] = get_id(config, cpu);
1362 
1363 	id = config->cpus_aggr_map->map[cpu.cpu];
1364 	return id;
1365 }
1366 
1367 static struct aggr_cpu_id perf_stat__get_socket_cached(struct perf_stat_config *config,
1368 						       struct perf_cpu cpu)
1369 {
1370 	return perf_stat__get_aggr(config, perf_stat__get_socket, cpu);
1371 }
1372 
1373 static struct aggr_cpu_id perf_stat__get_die_cached(struct perf_stat_config *config,
1374 						    struct perf_cpu cpu)
1375 {
1376 	return perf_stat__get_aggr(config, perf_stat__get_die, cpu);
1377 }
1378 
1379 static struct aggr_cpu_id perf_stat__get_core_cached(struct perf_stat_config *config,
1380 						     struct perf_cpu cpu)
1381 {
1382 	return perf_stat__get_aggr(config, perf_stat__get_core, cpu);
1383 }
1384 
1385 static struct aggr_cpu_id perf_stat__get_node_cached(struct perf_stat_config *config,
1386 						     struct perf_cpu cpu)
1387 {
1388 	return perf_stat__get_aggr(config, perf_stat__get_node, cpu);
1389 }
1390 
1391 static struct aggr_cpu_id perf_stat__get_global_cached(struct perf_stat_config *config,
1392 						       struct perf_cpu cpu)
1393 {
1394 	return perf_stat__get_aggr(config, perf_stat__get_global, cpu);
1395 }
1396 
1397 static struct aggr_cpu_id perf_stat__get_cpu_cached(struct perf_stat_config *config,
1398 						    struct perf_cpu cpu)
1399 {
1400 	return perf_stat__get_aggr(config, perf_stat__get_cpu, cpu);
1401 }
1402 
1403 static aggr_cpu_id_get_t aggr_mode__get_aggr(enum aggr_mode aggr_mode)
1404 {
1405 	switch (aggr_mode) {
1406 	case AGGR_SOCKET:
1407 		return aggr_cpu_id__socket;
1408 	case AGGR_DIE:
1409 		return aggr_cpu_id__die;
1410 	case AGGR_CORE:
1411 		return aggr_cpu_id__core;
1412 	case AGGR_NODE:
1413 		return aggr_cpu_id__node;
1414 	case AGGR_NONE:
1415 		return aggr_cpu_id__cpu;
1416 	case AGGR_GLOBAL:
1417 		return aggr_cpu_id__global;
1418 	case AGGR_THREAD:
1419 	case AGGR_UNSET:
1420 	case AGGR_MAX:
1421 	default:
1422 		return NULL;
1423 	}
1424 }
1425 
1426 static aggr_get_id_t aggr_mode__get_id(enum aggr_mode aggr_mode)
1427 {
1428 	switch (aggr_mode) {
1429 	case AGGR_SOCKET:
1430 		return perf_stat__get_socket_cached;
1431 	case AGGR_DIE:
1432 		return perf_stat__get_die_cached;
1433 	case AGGR_CORE:
1434 		return perf_stat__get_core_cached;
1435 	case AGGR_NODE:
1436 		return perf_stat__get_node_cached;
1437 	case AGGR_NONE:
1438 		return perf_stat__get_cpu_cached;
1439 	case AGGR_GLOBAL:
1440 		return perf_stat__get_global_cached;
1441 	case AGGR_THREAD:
1442 	case AGGR_UNSET:
1443 	case AGGR_MAX:
1444 	default:
1445 		return NULL;
1446 	}
1447 }
1448 
1449 static int perf_stat_init_aggr_mode(void)
1450 {
1451 	int nr;
1452 	aggr_cpu_id_get_t get_id = aggr_mode__get_aggr(stat_config.aggr_mode);
1453 
1454 	if (get_id) {
1455 		bool needs_sort = stat_config.aggr_mode != AGGR_NONE;
1456 		stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.user_requested_cpus,
1457 							 get_id, /*data=*/NULL, needs_sort);
1458 		if (!stat_config.aggr_map) {
1459 			pr_err("cannot build %s map", aggr_mode__string[stat_config.aggr_mode]);
1460 			return -1;
1461 		}
1462 		stat_config.aggr_get_id = aggr_mode__get_id(stat_config.aggr_mode);
1463 	}
1464 
1465 	if (stat_config.aggr_mode == AGGR_THREAD) {
1466 		nr = perf_thread_map__nr(evsel_list->core.threads);
1467 		stat_config.aggr_map = cpu_aggr_map__empty_new(nr);
1468 		if (stat_config.aggr_map == NULL)
1469 			return -ENOMEM;
1470 
1471 		for (int s = 0; s < nr; s++) {
1472 			struct aggr_cpu_id id = aggr_cpu_id__empty();
1473 
1474 			id.thread_idx = s;
1475 			stat_config.aggr_map->map[s] = id;
1476 		}
1477 		return 0;
1478 	}
1479 
1480 	/*
1481 	 * The evsel_list->cpus is the base we operate on,
1482 	 * taking the highest cpu number to be the size of
1483 	 * the aggregation translate cpumap.
1484 	 */
1485 	if (evsel_list->core.user_requested_cpus)
1486 		nr = perf_cpu_map__max(evsel_list->core.user_requested_cpus).cpu;
1487 	else
1488 		nr = 0;
1489 	stat_config.cpus_aggr_map = cpu_aggr_map__empty_new(nr + 1);
1490 	return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
1491 }
1492 
1493 static void cpu_aggr_map__delete(struct cpu_aggr_map *map)
1494 {
1495 	if (map) {
1496 		WARN_ONCE(refcount_read(&map->refcnt) != 0,
1497 			  "cpu_aggr_map refcnt unbalanced\n");
1498 		free(map);
1499 	}
1500 }
1501 
1502 static void cpu_aggr_map__put(struct cpu_aggr_map *map)
1503 {
1504 	if (map && refcount_dec_and_test(&map->refcnt))
1505 		cpu_aggr_map__delete(map);
1506 }
1507 
1508 static void perf_stat__exit_aggr_mode(void)
1509 {
1510 	cpu_aggr_map__put(stat_config.aggr_map);
1511 	cpu_aggr_map__put(stat_config.cpus_aggr_map);
1512 	stat_config.aggr_map = NULL;
1513 	stat_config.cpus_aggr_map = NULL;
1514 }
1515 
1516 static struct aggr_cpu_id perf_env__get_socket_aggr_by_cpu(struct perf_cpu cpu, void *data)
1517 {
1518 	struct perf_env *env = data;
1519 	struct aggr_cpu_id id = aggr_cpu_id__empty();
1520 
1521 	if (cpu.cpu != -1)
1522 		id.socket = env->cpu[cpu.cpu].socket_id;
1523 
1524 	return id;
1525 }
1526 
1527 static struct aggr_cpu_id perf_env__get_die_aggr_by_cpu(struct perf_cpu cpu, void *data)
1528 {
1529 	struct perf_env *env = data;
1530 	struct aggr_cpu_id id = aggr_cpu_id__empty();
1531 
1532 	if (cpu.cpu != -1) {
1533 		/*
1534 		 * die_id is relative to socket, so start
1535 		 * with the socket ID and then add die to
1536 		 * make a unique ID.
1537 		 */
1538 		id.socket = env->cpu[cpu.cpu].socket_id;
1539 		id.die = env->cpu[cpu.cpu].die_id;
1540 	}
1541 
1542 	return id;
1543 }
1544 
1545 static struct aggr_cpu_id perf_env__get_core_aggr_by_cpu(struct perf_cpu cpu, void *data)
1546 {
1547 	struct perf_env *env = data;
1548 	struct aggr_cpu_id id = aggr_cpu_id__empty();
1549 
1550 	if (cpu.cpu != -1) {
1551 		/*
1552 		 * core_id is relative to socket and die,
1553 		 * we need a global id. So we set
1554 		 * socket, die id and core id
1555 		 */
1556 		id.socket = env->cpu[cpu.cpu].socket_id;
1557 		id.die = env->cpu[cpu.cpu].die_id;
1558 		id.core = env->cpu[cpu.cpu].core_id;
1559 	}
1560 
1561 	return id;
1562 }
1563 
1564 static struct aggr_cpu_id perf_env__get_cpu_aggr_by_cpu(struct perf_cpu cpu, void *data)
1565 {
1566 	struct perf_env *env = data;
1567 	struct aggr_cpu_id id = aggr_cpu_id__empty();
1568 
1569 	if (cpu.cpu != -1) {
1570 		/*
1571 		 * core_id is relative to socket and die,
1572 		 * we need a global id. So we set
1573 		 * socket, die id and core id
1574 		 */
1575 		id.socket = env->cpu[cpu.cpu].socket_id;
1576 		id.die = env->cpu[cpu.cpu].die_id;
1577 		id.core = env->cpu[cpu.cpu].core_id;
1578 		id.cpu = cpu;
1579 	}
1580 
1581 	return id;
1582 }
1583 
1584 static struct aggr_cpu_id perf_env__get_node_aggr_by_cpu(struct perf_cpu cpu, void *data)
1585 {
1586 	struct aggr_cpu_id id = aggr_cpu_id__empty();
1587 
1588 	id.node = perf_env__numa_node(data, cpu);
1589 	return id;
1590 }
1591 
1592 static struct aggr_cpu_id perf_env__get_global_aggr_by_cpu(struct perf_cpu cpu __maybe_unused,
1593 							   void *data __maybe_unused)
1594 {
1595 	struct aggr_cpu_id id = aggr_cpu_id__empty();
1596 
1597 	/* it always aggregates to the cpu 0 */
1598 	id.cpu = (struct perf_cpu){ .cpu = 0 };
1599 	return id;
1600 }
1601 
1602 static struct aggr_cpu_id perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused,
1603 						     struct perf_cpu cpu)
1604 {
1605 	return perf_env__get_socket_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1606 }
1607 static struct aggr_cpu_id perf_stat__get_die_file(struct perf_stat_config *config __maybe_unused,
1608 						  struct perf_cpu cpu)
1609 {
1610 	return perf_env__get_die_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1611 }
1612 
1613 static struct aggr_cpu_id perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused,
1614 						   struct perf_cpu cpu)
1615 {
1616 	return perf_env__get_core_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1617 }
1618 
1619 static struct aggr_cpu_id perf_stat__get_cpu_file(struct perf_stat_config *config __maybe_unused,
1620 						  struct perf_cpu cpu)
1621 {
1622 	return perf_env__get_cpu_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1623 }
1624 
1625 static struct aggr_cpu_id perf_stat__get_node_file(struct perf_stat_config *config __maybe_unused,
1626 						   struct perf_cpu cpu)
1627 {
1628 	return perf_env__get_node_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1629 }
1630 
1631 static struct aggr_cpu_id perf_stat__get_global_file(struct perf_stat_config *config __maybe_unused,
1632 						     struct perf_cpu cpu)
1633 {
1634 	return perf_env__get_global_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1635 }
1636 
1637 static aggr_cpu_id_get_t aggr_mode__get_aggr_file(enum aggr_mode aggr_mode)
1638 {
1639 	switch (aggr_mode) {
1640 	case AGGR_SOCKET:
1641 		return perf_env__get_socket_aggr_by_cpu;
1642 	case AGGR_DIE:
1643 		return perf_env__get_die_aggr_by_cpu;
1644 	case AGGR_CORE:
1645 		return perf_env__get_core_aggr_by_cpu;
1646 	case AGGR_NODE:
1647 		return perf_env__get_node_aggr_by_cpu;
1648 	case AGGR_GLOBAL:
1649 		return perf_env__get_global_aggr_by_cpu;
1650 	case AGGR_NONE:
1651 		return perf_env__get_cpu_aggr_by_cpu;
1652 	case AGGR_THREAD:
1653 	case AGGR_UNSET:
1654 	case AGGR_MAX:
1655 	default:
1656 		return NULL;
1657 	}
1658 }
1659 
1660 static aggr_get_id_t aggr_mode__get_id_file(enum aggr_mode aggr_mode)
1661 {
1662 	switch (aggr_mode) {
1663 	case AGGR_SOCKET:
1664 		return perf_stat__get_socket_file;
1665 	case AGGR_DIE:
1666 		return perf_stat__get_die_file;
1667 	case AGGR_CORE:
1668 		return perf_stat__get_core_file;
1669 	case AGGR_NODE:
1670 		return perf_stat__get_node_file;
1671 	case AGGR_GLOBAL:
1672 		return perf_stat__get_global_file;
1673 	case AGGR_NONE:
1674 		return perf_stat__get_cpu_file;
1675 	case AGGR_THREAD:
1676 	case AGGR_UNSET:
1677 	case AGGR_MAX:
1678 	default:
1679 		return NULL;
1680 	}
1681 }
1682 
1683 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
1684 {
1685 	struct perf_env *env = &st->session->header.env;
1686 	aggr_cpu_id_get_t get_id = aggr_mode__get_aggr_file(stat_config.aggr_mode);
1687 	bool needs_sort = stat_config.aggr_mode != AGGR_NONE;
1688 
1689 	if (stat_config.aggr_mode == AGGR_THREAD) {
1690 		int nr = perf_thread_map__nr(evsel_list->core.threads);
1691 
1692 		stat_config.aggr_map = cpu_aggr_map__empty_new(nr);
1693 		if (stat_config.aggr_map == NULL)
1694 			return -ENOMEM;
1695 
1696 		for (int s = 0; s < nr; s++) {
1697 			struct aggr_cpu_id id = aggr_cpu_id__empty();
1698 
1699 			id.thread_idx = s;
1700 			stat_config.aggr_map->map[s] = id;
1701 		}
1702 		return 0;
1703 	}
1704 
1705 	if (!get_id)
1706 		return 0;
1707 
1708 	stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.user_requested_cpus,
1709 						 get_id, env, needs_sort);
1710 	if (!stat_config.aggr_map) {
1711 		pr_err("cannot build %s map", aggr_mode__string[stat_config.aggr_mode]);
1712 		return -1;
1713 	}
1714 	stat_config.aggr_get_id = aggr_mode__get_id_file(stat_config.aggr_mode);
1715 	return 0;
1716 }
1717 
1718 /*
1719  * Add default attributes, if there were no attributes specified or
1720  * if -d/--detailed, -d -d or -d -d -d is used:
1721  */
1722 static int add_default_attributes(void)
1723 {
1724 	int err;
1725 	struct perf_event_attr default_attrs0[] = {
1726 
1727   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK		},
1728   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES	},
1729   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS		},
1730   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS		},
1731 
1732   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES		},
1733 };
1734 	struct perf_event_attr frontend_attrs[] = {
1735   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND	},
1736 };
1737 	struct perf_event_attr backend_attrs[] = {
1738   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND	},
1739 };
1740 	struct perf_event_attr default_attrs1[] = {
1741   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS		},
1742   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS	},
1743   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES		},
1744 
1745 };
1746 
1747 /*
1748  * Detailed stats (-d), covering the L1 and last level data caches:
1749  */
1750 	struct perf_event_attr detailed_attrs[] = {
1751 
1752   { .type = PERF_TYPE_HW_CACHE,
1753     .config =
1754 	 PERF_COUNT_HW_CACHE_L1D		<<  0  |
1755 	(PERF_COUNT_HW_CACHE_OP_READ		<<  8) |
1756 	(PERF_COUNT_HW_CACHE_RESULT_ACCESS	<< 16)				},
1757 
1758   { .type = PERF_TYPE_HW_CACHE,
1759     .config =
1760 	 PERF_COUNT_HW_CACHE_L1D		<<  0  |
1761 	(PERF_COUNT_HW_CACHE_OP_READ		<<  8) |
1762 	(PERF_COUNT_HW_CACHE_RESULT_MISS	<< 16)				},
1763 
1764   { .type = PERF_TYPE_HW_CACHE,
1765     .config =
1766 	 PERF_COUNT_HW_CACHE_LL			<<  0  |
1767 	(PERF_COUNT_HW_CACHE_OP_READ		<<  8) |
1768 	(PERF_COUNT_HW_CACHE_RESULT_ACCESS	<< 16)				},
1769 
1770   { .type = PERF_TYPE_HW_CACHE,
1771     .config =
1772 	 PERF_COUNT_HW_CACHE_LL			<<  0  |
1773 	(PERF_COUNT_HW_CACHE_OP_READ		<<  8) |
1774 	(PERF_COUNT_HW_CACHE_RESULT_MISS	<< 16)				},
1775 };
1776 
1777 /*
1778  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1779  */
1780 	struct perf_event_attr very_detailed_attrs[] = {
1781 
1782   { .type = PERF_TYPE_HW_CACHE,
1783     .config =
1784 	 PERF_COUNT_HW_CACHE_L1I		<<  0  |
1785 	(PERF_COUNT_HW_CACHE_OP_READ		<<  8) |
1786 	(PERF_COUNT_HW_CACHE_RESULT_ACCESS	<< 16)				},
1787 
1788   { .type = PERF_TYPE_HW_CACHE,
1789     .config =
1790 	 PERF_COUNT_HW_CACHE_L1I		<<  0  |
1791 	(PERF_COUNT_HW_CACHE_OP_READ		<<  8) |
1792 	(PERF_COUNT_HW_CACHE_RESULT_MISS	<< 16)				},
1793 
1794   { .type = PERF_TYPE_HW_CACHE,
1795     .config =
1796 	 PERF_COUNT_HW_CACHE_DTLB		<<  0  |
1797 	(PERF_COUNT_HW_CACHE_OP_READ		<<  8) |
1798 	(PERF_COUNT_HW_CACHE_RESULT_ACCESS	<< 16)				},
1799 
1800   { .type = PERF_TYPE_HW_CACHE,
1801     .config =
1802 	 PERF_COUNT_HW_CACHE_DTLB		<<  0  |
1803 	(PERF_COUNT_HW_CACHE_OP_READ		<<  8) |
1804 	(PERF_COUNT_HW_CACHE_RESULT_MISS	<< 16)				},
1805 
1806   { .type = PERF_TYPE_HW_CACHE,
1807     .config =
1808 	 PERF_COUNT_HW_CACHE_ITLB		<<  0  |
1809 	(PERF_COUNT_HW_CACHE_OP_READ		<<  8) |
1810 	(PERF_COUNT_HW_CACHE_RESULT_ACCESS	<< 16)				},
1811 
1812   { .type = PERF_TYPE_HW_CACHE,
1813     .config =
1814 	 PERF_COUNT_HW_CACHE_ITLB		<<  0  |
1815 	(PERF_COUNT_HW_CACHE_OP_READ		<<  8) |
1816 	(PERF_COUNT_HW_CACHE_RESULT_MISS	<< 16)				},
1817 
1818 };
1819 
1820 /*
1821  * Very, very detailed stats (-d -d -d), adding prefetch events:
1822  */
1823 	struct perf_event_attr very_very_detailed_attrs[] = {
1824 
1825   { .type = PERF_TYPE_HW_CACHE,
1826     .config =
1827 	 PERF_COUNT_HW_CACHE_L1D		<<  0  |
1828 	(PERF_COUNT_HW_CACHE_OP_PREFETCH	<<  8) |
1829 	(PERF_COUNT_HW_CACHE_RESULT_ACCESS	<< 16)				},
1830 
1831   { .type = PERF_TYPE_HW_CACHE,
1832     .config =
1833 	 PERF_COUNT_HW_CACHE_L1D		<<  0  |
1834 	(PERF_COUNT_HW_CACHE_OP_PREFETCH	<<  8) |
1835 	(PERF_COUNT_HW_CACHE_RESULT_MISS	<< 16)				},
1836 };
1837 
1838 	struct perf_event_attr default_null_attrs[] = {};
1839 
1840 	/* Set attrs if no event is selected and !null_run: */
1841 	if (stat_config.null_run)
1842 		return 0;
1843 
1844 	if (transaction_run) {
1845 		struct parse_events_error errinfo;
1846 		/* Handle -T as -M transaction. Once platform specific metrics
1847 		 * support has been added to the json files, all architectures
1848 		 * will use this approach. To determine transaction support
1849 		 * on an architecture test for such a metric name.
1850 		 */
1851 		if (metricgroup__has_metric("transaction")) {
1852 			return metricgroup__parse_groups(evsel_list, "transaction",
1853 							 stat_config.metric_no_group,
1854 							 stat_config.metric_no_merge,
1855 							 stat_config.user_requested_cpu_list,
1856 							 stat_config.system_wide,
1857 							 &stat_config.metric_events);
1858 		}
1859 
1860 		parse_events_error__init(&errinfo);
1861 		if (pmu_have_event("cpu", "cycles-ct") &&
1862 		    pmu_have_event("cpu", "el-start"))
1863 			err = parse_events(evsel_list, transaction_attrs,
1864 					   &errinfo);
1865 		else
1866 			err = parse_events(evsel_list,
1867 					   transaction_limited_attrs,
1868 					   &errinfo);
1869 		if (err) {
1870 			fprintf(stderr, "Cannot set up transaction events\n");
1871 			parse_events_error__print(&errinfo, transaction_attrs);
1872 		}
1873 		parse_events_error__exit(&errinfo);
1874 		return err ? -1 : 0;
1875 	}
1876 
1877 	if (smi_cost) {
1878 		struct parse_events_error errinfo;
1879 		int smi;
1880 
1881 		if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
1882 			fprintf(stderr, "freeze_on_smi is not supported.\n");
1883 			return -1;
1884 		}
1885 
1886 		if (!smi) {
1887 			if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) {
1888 				fprintf(stderr, "Failed to set freeze_on_smi.\n");
1889 				return -1;
1890 			}
1891 			smi_reset = true;
1892 		}
1893 
1894 		if (!pmu_have_event("msr", "aperf") ||
1895 		    !pmu_have_event("msr", "smi")) {
1896 			fprintf(stderr, "To measure SMI cost, it needs "
1897 				"msr/aperf/, msr/smi/ and cpu/cycles/ support\n");
1898 			return -1;
1899 		}
1900 		if (!force_metric_only)
1901 			stat_config.metric_only = true;
1902 
1903 		parse_events_error__init(&errinfo);
1904 		err = parse_events(evsel_list, smi_cost_attrs, &errinfo);
1905 		if (err) {
1906 			parse_events_error__print(&errinfo, smi_cost_attrs);
1907 			fprintf(stderr, "Cannot set up SMI cost events\n");
1908 		}
1909 		parse_events_error__exit(&errinfo);
1910 		return err ? -1 : 0;
1911 	}
1912 
1913 	if (topdown_run) {
1914 		const char **metric_attrs = topdown_metric_attrs;
1915 		unsigned int max_level = 1;
1916 		char *str = NULL;
1917 		bool warn = false;
1918 		const char *pmu_name = arch_get_topdown_pmu_name(evsel_list, true);
1919 
1920 		if (!force_metric_only)
1921 			stat_config.metric_only = true;
1922 
1923 		if (pmu_have_event(pmu_name, topdown_metric_L2_attrs[5])) {
1924 			metric_attrs = topdown_metric_L2_attrs;
1925 			max_level = 2;
1926 		}
1927 
1928 		if (stat_config.topdown_level > max_level) {
1929 			pr_err("Invalid top-down metrics level. The max level is %u.\n", max_level);
1930 			return -1;
1931 		} else if (!stat_config.topdown_level)
1932 			stat_config.topdown_level = max_level;
1933 
1934 		if (topdown_filter_events(metric_attrs, &str, 1, pmu_name) < 0) {
1935 			pr_err("Out of memory\n");
1936 			return -1;
1937 		}
1938 
1939 		if (metric_attrs[0] && str) {
1940 			if (!stat_config.interval && !stat_config.metric_only) {
1941 				fprintf(stat_config.output,
1942 					"Topdown accuracy may decrease when measuring long periods.\n"
1943 					"Please print the result regularly, e.g. -I1000\n");
1944 			}
1945 			goto setup_metrics;
1946 		}
1947 
1948 		zfree(&str);
1949 
1950 		if (stat_config.aggr_mode != AGGR_GLOBAL &&
1951 		    stat_config.aggr_mode != AGGR_CORE) {
1952 			pr_err("top down event configuration requires --per-core mode\n");
1953 			return -1;
1954 		}
1955 		stat_config.aggr_mode = AGGR_CORE;
1956 		if (nr_cgroups || !target__has_cpu(&target)) {
1957 			pr_err("top down event configuration requires system-wide mode (-a)\n");
1958 			return -1;
1959 		}
1960 
1961 		if (topdown_filter_events(topdown_attrs, &str,
1962 				arch_topdown_check_group(&warn),
1963 				pmu_name) < 0) {
1964 			pr_err("Out of memory\n");
1965 			return -1;
1966 		}
1967 
1968 		if (topdown_attrs[0] && str) {
1969 			struct parse_events_error errinfo;
1970 			if (warn)
1971 				arch_topdown_group_warn();
1972 setup_metrics:
1973 			parse_events_error__init(&errinfo);
1974 			err = parse_events(evsel_list, str, &errinfo);
1975 			if (err) {
1976 				fprintf(stderr,
1977 					"Cannot set up top down events %s: %d\n",
1978 					str, err);
1979 				parse_events_error__print(&errinfo, str);
1980 				parse_events_error__exit(&errinfo);
1981 				free(str);
1982 				return -1;
1983 			}
1984 			parse_events_error__exit(&errinfo);
1985 		} else {
1986 			fprintf(stderr, "System does not support topdown\n");
1987 			return -1;
1988 		}
1989 		free(str);
1990 	}
1991 
1992 	if (!stat_config.topdown_level)
1993 		stat_config.topdown_level = TOPDOWN_MAX_LEVEL;
1994 
1995 	if (!evsel_list->core.nr_entries) {
1996 		if (target__has_cpu(&target))
1997 			default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
1998 
1999 		if (evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
2000 			return -1;
2001 		if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
2002 			if (evlist__add_default_attrs(evsel_list, frontend_attrs) < 0)
2003 				return -1;
2004 		}
2005 		if (pmu_have_event("cpu", "stalled-cycles-backend")) {
2006 			if (evlist__add_default_attrs(evsel_list, backend_attrs) < 0)
2007 				return -1;
2008 		}
2009 		if (evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
2010 			return -1;
2011 		/* Platform specific attrs */
2012 		if (evlist__add_default_attrs(evsel_list, default_null_attrs) < 0)
2013 			return -1;
2014 	}
2015 
2016 	/* Detailed events get appended to the event list: */
2017 
2018 	if (detailed_run <  1)
2019 		return 0;
2020 
2021 	/* Append detailed run extra attributes: */
2022 	if (evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
2023 		return -1;
2024 
2025 	if (detailed_run < 2)
2026 		return 0;
2027 
2028 	/* Append very detailed run extra attributes: */
2029 	if (evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
2030 		return -1;
2031 
2032 	if (detailed_run < 3)
2033 		return 0;
2034 
2035 	/* Append very, very detailed run extra attributes: */
2036 	return evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
2037 }
2038 
2039 static const char * const stat_record_usage[] = {
2040 	"perf stat record [<options>]",
2041 	NULL,
2042 };
2043 
2044 static void init_features(struct perf_session *session)
2045 {
2046 	int feat;
2047 
2048 	for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
2049 		perf_header__set_feat(&session->header, feat);
2050 
2051 	perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT);
2052 	perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
2053 	perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
2054 	perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
2055 	perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
2056 }
2057 
2058 static int __cmd_record(int argc, const char **argv)
2059 {
2060 	struct perf_session *session;
2061 	struct perf_data *data = &perf_stat.data;
2062 
2063 	argc = parse_options(argc, argv, stat_options, stat_record_usage,
2064 			     PARSE_OPT_STOP_AT_NON_OPTION);
2065 
2066 	if (output_name)
2067 		data->path = output_name;
2068 
2069 	if (stat_config.run_count != 1 || forever) {
2070 		pr_err("Cannot use -r option with perf stat record.\n");
2071 		return -1;
2072 	}
2073 
2074 	session = perf_session__new(data, NULL);
2075 	if (IS_ERR(session)) {
2076 		pr_err("Perf session creation failed\n");
2077 		return PTR_ERR(session);
2078 	}
2079 
2080 	init_features(session);
2081 
2082 	session->evlist   = evsel_list;
2083 	perf_stat.session = session;
2084 	perf_stat.record  = true;
2085 	return argc;
2086 }
2087 
2088 static int process_stat_round_event(struct perf_session *session,
2089 				    union perf_event *event)
2090 {
2091 	struct perf_record_stat_round *stat_round = &event->stat_round;
2092 	struct timespec tsh, *ts = NULL;
2093 	const char **argv = session->header.env.cmdline_argv;
2094 	int argc = session->header.env.nr_cmdline;
2095 
2096 	process_counters();
2097 
2098 	if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
2099 		update_stats(&walltime_nsecs_stats, stat_round->time);
2100 
2101 	if (stat_config.interval && stat_round->time) {
2102 		tsh.tv_sec  = stat_round->time / NSEC_PER_SEC;
2103 		tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
2104 		ts = &tsh;
2105 	}
2106 
2107 	print_counters(ts, argc, argv);
2108 	return 0;
2109 }
2110 
2111 static
2112 int process_stat_config_event(struct perf_session *session,
2113 			      union perf_event *event)
2114 {
2115 	struct perf_tool *tool = session->tool;
2116 	struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2117 
2118 	perf_event__read_stat_config(&stat_config, &event->stat_config);
2119 
2120 	if (perf_cpu_map__empty(st->cpus)) {
2121 		if (st->aggr_mode != AGGR_UNSET)
2122 			pr_warning("warning: processing task data, aggregation mode not set\n");
2123 	} else if (st->aggr_mode != AGGR_UNSET) {
2124 		stat_config.aggr_mode = st->aggr_mode;
2125 	}
2126 
2127 	if (perf_stat.data.is_pipe)
2128 		perf_stat_init_aggr_mode();
2129 	else
2130 		perf_stat_init_aggr_mode_file(st);
2131 
2132 	if (stat_config.aggr_map) {
2133 		int nr_aggr = stat_config.aggr_map->nr;
2134 
2135 		if (evlist__alloc_aggr_stats(session->evlist, nr_aggr) < 0) {
2136 			pr_err("cannot allocate aggr counts\n");
2137 			return -1;
2138 		}
2139 	}
2140 	return 0;
2141 }
2142 
2143 static int set_maps(struct perf_stat *st)
2144 {
2145 	if (!st->cpus || !st->threads)
2146 		return 0;
2147 
2148 	if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
2149 		return -EINVAL;
2150 
2151 	perf_evlist__set_maps(&evsel_list->core, st->cpus, st->threads);
2152 
2153 	if (evlist__alloc_stats(&stat_config, evsel_list, /*alloc_raw=*/true))
2154 		return -ENOMEM;
2155 
2156 	st->maps_allocated = true;
2157 	return 0;
2158 }
2159 
2160 static
2161 int process_thread_map_event(struct perf_session *session,
2162 			     union perf_event *event)
2163 {
2164 	struct perf_tool *tool = session->tool;
2165 	struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2166 
2167 	if (st->threads) {
2168 		pr_warning("Extra thread map event, ignoring.\n");
2169 		return 0;
2170 	}
2171 
2172 	st->threads = thread_map__new_event(&event->thread_map);
2173 	if (!st->threads)
2174 		return -ENOMEM;
2175 
2176 	return set_maps(st);
2177 }
2178 
2179 static
2180 int process_cpu_map_event(struct perf_session *session,
2181 			  union perf_event *event)
2182 {
2183 	struct perf_tool *tool = session->tool;
2184 	struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2185 	struct perf_cpu_map *cpus;
2186 
2187 	if (st->cpus) {
2188 		pr_warning("Extra cpu map event, ignoring.\n");
2189 		return 0;
2190 	}
2191 
2192 	cpus = cpu_map__new_data(&event->cpu_map.data);
2193 	if (!cpus)
2194 		return -ENOMEM;
2195 
2196 	st->cpus = cpus;
2197 	return set_maps(st);
2198 }
2199 
2200 static const char * const stat_report_usage[] = {
2201 	"perf stat report [<options>]",
2202 	NULL,
2203 };
2204 
2205 static struct perf_stat perf_stat = {
2206 	.tool = {
2207 		.attr		= perf_event__process_attr,
2208 		.event_update	= perf_event__process_event_update,
2209 		.thread_map	= process_thread_map_event,
2210 		.cpu_map	= process_cpu_map_event,
2211 		.stat_config	= process_stat_config_event,
2212 		.stat		= perf_event__process_stat_event,
2213 		.stat_round	= process_stat_round_event,
2214 	},
2215 	.aggr_mode = AGGR_UNSET,
2216 };
2217 
2218 static int __cmd_report(int argc, const char **argv)
2219 {
2220 	struct perf_session *session;
2221 	const struct option options[] = {
2222 	OPT_STRING('i', "input", &input_name, "file", "input file name"),
2223 	OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
2224 		     "aggregate counts per processor socket", AGGR_SOCKET),
2225 	OPT_SET_UINT(0, "per-die", &perf_stat.aggr_mode,
2226 		     "aggregate counts per processor die", AGGR_DIE),
2227 	OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
2228 		     "aggregate counts per physical processor core", AGGR_CORE),
2229 	OPT_SET_UINT(0, "per-node", &perf_stat.aggr_mode,
2230 		     "aggregate counts per numa node", AGGR_NODE),
2231 	OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
2232 		     "disable CPU count aggregation", AGGR_NONE),
2233 	OPT_END()
2234 	};
2235 	struct stat st;
2236 	int ret;
2237 
2238 	argc = parse_options(argc, argv, options, stat_report_usage, 0);
2239 
2240 	if (!input_name || !strlen(input_name)) {
2241 		if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
2242 			input_name = "-";
2243 		else
2244 			input_name = "perf.data";
2245 	}
2246 
2247 	perf_stat__init_shadow_stats();
2248 
2249 	perf_stat.data.path = input_name;
2250 	perf_stat.data.mode = PERF_DATA_MODE_READ;
2251 
2252 	session = perf_session__new(&perf_stat.data, &perf_stat.tool);
2253 	if (IS_ERR(session))
2254 		return PTR_ERR(session);
2255 
2256 	perf_stat.session  = session;
2257 	stat_config.output = stderr;
2258 	evsel_list         = session->evlist;
2259 
2260 	ret = perf_session__process_events(session);
2261 	if (ret)
2262 		return ret;
2263 
2264 	perf_session__delete(session);
2265 	return 0;
2266 }
2267 
2268 static void setup_system_wide(int forks)
2269 {
2270 	/*
2271 	 * Make system wide (-a) the default target if
2272 	 * no target was specified and one of following
2273 	 * conditions is met:
2274 	 *
2275 	 *   - there's no workload specified
2276 	 *   - there is workload specified but all requested
2277 	 *     events are system wide events
2278 	 */
2279 	if (!target__none(&target))
2280 		return;
2281 
2282 	if (!forks)
2283 		target.system_wide = true;
2284 	else {
2285 		struct evsel *counter;
2286 
2287 		evlist__for_each_entry(evsel_list, counter) {
2288 			if (!counter->core.requires_cpu &&
2289 			    strcmp(counter->name, "duration_time")) {
2290 				return;
2291 			}
2292 		}
2293 
2294 		if (evsel_list->core.nr_entries)
2295 			target.system_wide = true;
2296 	}
2297 }
2298 
2299 int cmd_stat(int argc, const char **argv)
2300 {
2301 	const char * const stat_usage[] = {
2302 		"perf stat [<options>] [<command>]",
2303 		NULL
2304 	};
2305 	int status = -EINVAL, run_idx, err;
2306 	const char *mode;
2307 	FILE *output = stderr;
2308 	unsigned int interval, timeout;
2309 	const char * const stat_subcommands[] = { "record", "report" };
2310 	char errbuf[BUFSIZ];
2311 
2312 	setlocale(LC_ALL, "");
2313 
2314 	evsel_list = evlist__new();
2315 	if (evsel_list == NULL)
2316 		return -ENOMEM;
2317 
2318 	parse_events__shrink_config_terms();
2319 
2320 	/* String-parsing callback-based options would segfault when negated */
2321 	set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG);
2322 	set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG);
2323 	set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG);
2324 
2325 	argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
2326 					(const char **) stat_usage,
2327 					PARSE_OPT_STOP_AT_NON_OPTION);
2328 
2329 	if (stat_config.csv_sep) {
2330 		stat_config.csv_output = true;
2331 		if (!strcmp(stat_config.csv_sep, "\\t"))
2332 			stat_config.csv_sep = "\t";
2333 	} else
2334 		stat_config.csv_sep = DEFAULT_SEPARATOR;
2335 
2336 	if (argc && strlen(argv[0]) > 2 && strstarts("record", argv[0])) {
2337 		argc = __cmd_record(argc, argv);
2338 		if (argc < 0)
2339 			return -1;
2340 	} else if (argc && strlen(argv[0]) > 2 && strstarts("report", argv[0]))
2341 		return __cmd_report(argc, argv);
2342 
2343 	interval = stat_config.interval;
2344 	timeout = stat_config.timeout;
2345 
2346 	/*
2347 	 * For record command the -o is already taken care of.
2348 	 */
2349 	if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
2350 		output = NULL;
2351 
2352 	if (output_name && output_fd) {
2353 		fprintf(stderr, "cannot use both --output and --log-fd\n");
2354 		parse_options_usage(stat_usage, stat_options, "o", 1);
2355 		parse_options_usage(NULL, stat_options, "log-fd", 0);
2356 		goto out;
2357 	}
2358 
2359 	if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) {
2360 		fprintf(stderr, "--metric-only is not supported with --per-thread\n");
2361 		goto out;
2362 	}
2363 
2364 	if (stat_config.metric_only && stat_config.run_count > 1) {
2365 		fprintf(stderr, "--metric-only is not supported with -r\n");
2366 		goto out;
2367 	}
2368 
2369 	if (stat_config.walltime_run_table && stat_config.run_count <= 1) {
2370 		fprintf(stderr, "--table is only supported with -r\n");
2371 		parse_options_usage(stat_usage, stat_options, "r", 1);
2372 		parse_options_usage(NULL, stat_options, "table", 0);
2373 		goto out;
2374 	}
2375 
2376 	if (output_fd < 0) {
2377 		fprintf(stderr, "argument to --log-fd must be a > 0\n");
2378 		parse_options_usage(stat_usage, stat_options, "log-fd", 0);
2379 		goto out;
2380 	}
2381 
2382 	if (!output && !quiet) {
2383 		struct timespec tm;
2384 		mode = append_file ? "a" : "w";
2385 
2386 		output = fopen(output_name, mode);
2387 		if (!output) {
2388 			perror("failed to create output file");
2389 			return -1;
2390 		}
2391 		clock_gettime(CLOCK_REALTIME, &tm);
2392 		fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
2393 	} else if (output_fd > 0) {
2394 		mode = append_file ? "a" : "w";
2395 		output = fdopen(output_fd, mode);
2396 		if (!output) {
2397 			perror("Failed opening logfd");
2398 			return -errno;
2399 		}
2400 	}
2401 
2402 	if (stat_config.interval_clear && !isatty(fileno(output))) {
2403 		fprintf(stderr, "--interval-clear does not work with output\n");
2404 		parse_options_usage(stat_usage, stat_options, "o", 1);
2405 		parse_options_usage(NULL, stat_options, "log-fd", 0);
2406 		parse_options_usage(NULL, stat_options, "interval-clear", 0);
2407 		return -1;
2408 	}
2409 
2410 	stat_config.output = output;
2411 
2412 	/*
2413 	 * let the spreadsheet do the pretty-printing
2414 	 */
2415 	if (stat_config.csv_output) {
2416 		/* User explicitly passed -B? */
2417 		if (big_num_opt == 1) {
2418 			fprintf(stderr, "-B option not supported with -x\n");
2419 			parse_options_usage(stat_usage, stat_options, "B", 1);
2420 			parse_options_usage(NULL, stat_options, "x", 1);
2421 			goto out;
2422 		} else /* Nope, so disable big number formatting */
2423 			stat_config.big_num = false;
2424 	} else if (big_num_opt == 0) /* User passed --no-big-num */
2425 		stat_config.big_num = false;
2426 
2427 	err = target__validate(&target);
2428 	if (err) {
2429 		target__strerror(&target, err, errbuf, BUFSIZ);
2430 		pr_warning("%s\n", errbuf);
2431 	}
2432 
2433 	setup_system_wide(argc);
2434 
2435 	/*
2436 	 * Display user/system times only for single
2437 	 * run and when there's specified tracee.
2438 	 */
2439 	if ((stat_config.run_count == 1) && target__none(&target))
2440 		stat_config.ru_display = true;
2441 
2442 	if (stat_config.run_count < 0) {
2443 		pr_err("Run count must be a positive number\n");
2444 		parse_options_usage(stat_usage, stat_options, "r", 1);
2445 		goto out;
2446 	} else if (stat_config.run_count == 0) {
2447 		forever = true;
2448 		stat_config.run_count = 1;
2449 	}
2450 
2451 	if (stat_config.walltime_run_table) {
2452 		stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0]));
2453 		if (!stat_config.walltime_run) {
2454 			pr_err("failed to setup -r option");
2455 			goto out;
2456 		}
2457 	}
2458 
2459 	if ((stat_config.aggr_mode == AGGR_THREAD) &&
2460 		!target__has_task(&target)) {
2461 		if (!target.system_wide || target.cpu_list) {
2462 			fprintf(stderr, "The --per-thread option is only "
2463 				"available when monitoring via -p -t -a "
2464 				"options or only --per-thread.\n");
2465 			parse_options_usage(NULL, stat_options, "p", 1);
2466 			parse_options_usage(NULL, stat_options, "t", 1);
2467 			goto out;
2468 		}
2469 	}
2470 
2471 	/*
2472 	 * no_aggr, cgroup are for system-wide only
2473 	 * --per-thread is aggregated per thread, we dont mix it with cpu mode
2474 	 */
2475 	if (((stat_config.aggr_mode != AGGR_GLOBAL &&
2476 	      stat_config.aggr_mode != AGGR_THREAD) ||
2477 	     (nr_cgroups || stat_config.cgroup_list)) &&
2478 	    !target__has_cpu(&target)) {
2479 		fprintf(stderr, "both cgroup and no-aggregation "
2480 			"modes only available in system-wide mode\n");
2481 
2482 		parse_options_usage(stat_usage, stat_options, "G", 1);
2483 		parse_options_usage(NULL, stat_options, "A", 1);
2484 		parse_options_usage(NULL, stat_options, "a", 1);
2485 		parse_options_usage(NULL, stat_options, "for-each-cgroup", 0);
2486 		goto out;
2487 	}
2488 
2489 	if (stat_config.iostat_run) {
2490 		status = iostat_prepare(evsel_list, &stat_config);
2491 		if (status)
2492 			goto out;
2493 		if (iostat_mode == IOSTAT_LIST) {
2494 			iostat_list(evsel_list, &stat_config);
2495 			goto out;
2496 		} else if (verbose > 0)
2497 			iostat_list(evsel_list, &stat_config);
2498 		if (iostat_mode == IOSTAT_RUN && !target__has_cpu(&target))
2499 			target.system_wide = true;
2500 	}
2501 
2502 	if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
2503 		target.per_thread = true;
2504 
2505 	stat_config.system_wide = target.system_wide;
2506 	if (target.cpu_list) {
2507 		stat_config.user_requested_cpu_list = strdup(target.cpu_list);
2508 		if (!stat_config.user_requested_cpu_list) {
2509 			status = -ENOMEM;
2510 			goto out;
2511 		}
2512 	}
2513 
2514 	/*
2515 	 * Metric parsing needs to be delayed as metrics may optimize events
2516 	 * knowing the target is system-wide.
2517 	 */
2518 	if (metrics) {
2519 		metricgroup__parse_groups(evsel_list, metrics,
2520 					stat_config.metric_no_group,
2521 					stat_config.metric_no_merge,
2522 					stat_config.user_requested_cpu_list,
2523 					stat_config.system_wide,
2524 					&stat_config.metric_events);
2525 		zfree(&metrics);
2526 	}
2527 	perf_stat__init_shadow_stats();
2528 
2529 	if (add_default_attributes())
2530 		goto out;
2531 
2532 	if (stat_config.cgroup_list) {
2533 		if (nr_cgroups > 0) {
2534 			pr_err("--cgroup and --for-each-cgroup cannot be used together\n");
2535 			parse_options_usage(stat_usage, stat_options, "G", 1);
2536 			parse_options_usage(NULL, stat_options, "for-each-cgroup", 0);
2537 			goto out;
2538 		}
2539 
2540 		if (evlist__expand_cgroup(evsel_list, stat_config.cgroup_list,
2541 					  &stat_config.metric_events, true) < 0) {
2542 			parse_options_usage(stat_usage, stat_options,
2543 					    "for-each-cgroup", 0);
2544 			goto out;
2545 		}
2546 	}
2547 
2548 	if (evlist__fix_hybrid_cpus(evsel_list, target.cpu_list)) {
2549 		pr_err("failed to use cpu list %s\n", target.cpu_list);
2550 		goto out;
2551 	}
2552 
2553 	target.hybrid = perf_pmu__has_hybrid();
2554 	if (evlist__create_maps(evsel_list, &target) < 0) {
2555 		if (target__has_task(&target)) {
2556 			pr_err("Problems finding threads of monitor\n");
2557 			parse_options_usage(stat_usage, stat_options, "p", 1);
2558 			parse_options_usage(NULL, stat_options, "t", 1);
2559 		} else if (target__has_cpu(&target)) {
2560 			perror("failed to parse CPUs map");
2561 			parse_options_usage(stat_usage, stat_options, "C", 1);
2562 			parse_options_usage(NULL, stat_options, "a", 1);
2563 		}
2564 		goto out;
2565 	}
2566 
2567 	evlist__check_cpu_maps(evsel_list);
2568 
2569 	/*
2570 	 * Initialize thread_map with comm names,
2571 	 * so we could print it out on output.
2572 	 */
2573 	if (stat_config.aggr_mode == AGGR_THREAD) {
2574 		thread_map__read_comms(evsel_list->core.threads);
2575 	}
2576 
2577 	if (stat_config.aggr_mode == AGGR_NODE)
2578 		cpu__setup_cpunode_map();
2579 
2580 	if (stat_config.times && interval)
2581 		interval_count = true;
2582 	else if (stat_config.times && !interval) {
2583 		pr_err("interval-count option should be used together with "
2584 				"interval-print.\n");
2585 		parse_options_usage(stat_usage, stat_options, "interval-count", 0);
2586 		parse_options_usage(stat_usage, stat_options, "I", 1);
2587 		goto out;
2588 	}
2589 
2590 	if (timeout && timeout < 100) {
2591 		if (timeout < 10) {
2592 			pr_err("timeout must be >= 10ms.\n");
2593 			parse_options_usage(stat_usage, stat_options, "timeout", 0);
2594 			goto out;
2595 		} else
2596 			pr_warning("timeout < 100ms. "
2597 				   "The overhead percentage could be high in some cases. "
2598 				   "Please proceed with caution.\n");
2599 	}
2600 	if (timeout && interval) {
2601 		pr_err("timeout option is not supported with interval-print.\n");
2602 		parse_options_usage(stat_usage, stat_options, "timeout", 0);
2603 		parse_options_usage(stat_usage, stat_options, "I", 1);
2604 		goto out;
2605 	}
2606 
2607 	if (perf_stat_init_aggr_mode())
2608 		goto out;
2609 
2610 	if (evlist__alloc_stats(&stat_config, evsel_list, interval))
2611 		goto out;
2612 
2613 	/*
2614 	 * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
2615 	 * while avoiding that older tools show confusing messages.
2616 	 *
2617 	 * However for pipe sessions we need to keep it zero,
2618 	 * because script's perf_evsel__check_attr is triggered
2619 	 * by attr->sample_type != 0, and we can't run it on
2620 	 * stat sessions.
2621 	 */
2622 	stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe);
2623 
2624 	/*
2625 	 * We dont want to block the signals - that would cause
2626 	 * child tasks to inherit that and Ctrl-C would not work.
2627 	 * What we want is for Ctrl-C to work in the exec()-ed
2628 	 * task, but being ignored by perf stat itself:
2629 	 */
2630 	atexit(sig_atexit);
2631 	if (!forever)
2632 		signal(SIGINT,  skip_signal);
2633 	signal(SIGCHLD, skip_signal);
2634 	signal(SIGALRM, skip_signal);
2635 	signal(SIGABRT, skip_signal);
2636 
2637 	if (evlist__initialize_ctlfd(evsel_list, stat_config.ctl_fd, stat_config.ctl_fd_ack))
2638 		goto out;
2639 
2640 	/* Enable ignoring missing threads when -p option is defined. */
2641 	evlist__first(evsel_list)->ignore_missing_thread = target.pid;
2642 	status = 0;
2643 	for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) {
2644 		if (stat_config.run_count != 1 && verbose > 0)
2645 			fprintf(output, "[ perf stat: executing run #%d ... ]\n",
2646 				run_idx + 1);
2647 
2648 		if (run_idx != 0)
2649 			evlist__reset_prev_raw_counts(evsel_list);
2650 
2651 		status = run_perf_stat(argc, argv, run_idx);
2652 		if (forever && status != -1 && !interval) {
2653 			print_counters(NULL, argc, argv);
2654 			perf_stat__reset_stats();
2655 		}
2656 	}
2657 
2658 	if (!forever && status != -1 && (!interval || stat_config.summary))
2659 		print_counters(NULL, argc, argv);
2660 
2661 	evlist__finalize_ctlfd(evsel_list);
2662 
2663 	if (STAT_RECORD) {
2664 		/*
2665 		 * We synthesize the kernel mmap record just so that older tools
2666 		 * don't emit warnings about not being able to resolve symbols
2667 		 * due to /proc/sys/kernel/kptr_restrict settings and instead provide
2668 		 * a saner message about no samples being in the perf.data file.
2669 		 *
2670 		 * This also serves to suppress a warning about f_header.data.size == 0
2671 		 * in header.c at the moment 'perf stat record' gets introduced, which
2672 		 * is not really needed once we start adding the stat specific PERF_RECORD_
2673 		 * records, but the need to suppress the kptr_restrict messages in older
2674 		 * tools remain  -acme
2675 		 */
2676 		int fd = perf_data__fd(&perf_stat.data);
2677 
2678 		err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
2679 							 process_synthesized_event,
2680 							 &perf_stat.session->machines.host);
2681 		if (err) {
2682 			pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
2683 				   "older tools may produce warnings about this file\n.");
2684 		}
2685 
2686 		if (!interval) {
2687 			if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
2688 				pr_err("failed to write stat round event\n");
2689 		}
2690 
2691 		if (!perf_stat.data.is_pipe) {
2692 			perf_stat.session->header.data_size += perf_stat.bytes_written;
2693 			perf_session__write_header(perf_stat.session, evsel_list, fd, true);
2694 		}
2695 
2696 		evlist__close(evsel_list);
2697 		perf_session__delete(perf_stat.session);
2698 	}
2699 
2700 	perf_stat__exit_aggr_mode();
2701 	evlist__free_stats(evsel_list);
2702 out:
2703 	if (stat_config.iostat_run)
2704 		iostat_release(evsel_list);
2705 
2706 	zfree(&stat_config.walltime_run);
2707 	zfree(&stat_config.user_requested_cpu_list);
2708 
2709 	if (smi_cost && smi_reset)
2710 		sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
2711 
2712 	evlist__delete(evsel_list);
2713 
2714 	metricgroup__rblist_exit(&stat_config.metric_events);
2715 	evlist__close_control(stat_config.ctl_fd, stat_config.ctl_fd_ack, &stat_config.ctl_fd_close);
2716 
2717 	return status;
2718 }
2719