perf stat aggregation: Add separate die member
[linux-2.6-microblaze.git] / tools / perf / builtin-stat.c
1 // SPDX-License-Identifier: GPL-2.0-only
2 /*
3  * builtin-stat.c
4  *
5  * Builtin stat command: Give a precise performance counters summary
6  * overview about any workload, CPU or specific PID.
7  *
8  * Sample output:
9
10    $ perf stat ./hackbench 10
11
12   Time: 0.118
13
14   Performance counter stats for './hackbench 10':
15
16        1708.761321 task-clock                #   11.037 CPUs utilized
17             41,190 context-switches          #    0.024 M/sec
18              6,735 CPU-migrations            #    0.004 M/sec
19             17,318 page-faults               #    0.010 M/sec
20      5,205,202,243 cycles                    #    3.046 GHz
21      3,856,436,920 stalled-cycles-frontend   #   74.09% frontend cycles idle
22      1,600,790,871 stalled-cycles-backend    #   30.75% backend  cycles idle
23      2,603,501,247 instructions              #    0.50  insns per cycle
24                                              #    1.48  stalled cycles per insn
25        484,357,498 branches                  #  283.455 M/sec
26          6,388,934 branch-misses             #    1.32% of all branches
27
28         0.154822978  seconds time elapsed
29
30  *
31  * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
32  *
33  * Improvements and fixes by:
34  *
35  *   Arjan van de Ven <arjan@linux.intel.com>
36  *   Yanmin Zhang <yanmin.zhang@intel.com>
37  *   Wu Fengguang <fengguang.wu@intel.com>
38  *   Mike Galbraith <efault@gmx.de>
39  *   Paul Mackerras <paulus@samba.org>
40  *   Jaswinder Singh Rajput <jaswinder@kernel.org>
41  */
42
43 #include "builtin.h"
44 #include "perf.h"
45 #include "util/cgroup.h"
46 #include <subcmd/parse-options.h>
47 #include "util/parse-events.h"
48 #include "util/pmu.h"
49 #include "util/event.h"
50 #include "util/evlist.h"
51 #include "util/evsel.h"
52 #include "util/debug.h"
53 #include "util/color.h"
54 #include "util/stat.h"
55 #include "util/header.h"
56 #include "util/cpumap.h"
57 #include "util/thread_map.h"
58 #include "util/counts.h"
59 #include "util/topdown.h"
60 #include "util/session.h"
61 #include "util/tool.h"
62 #include "util/string2.h"
63 #include "util/metricgroup.h"
64 #include "util/synthetic-events.h"
65 #include "util/target.h"
66 #include "util/time-utils.h"
67 #include "util/top.h"
68 #include "util/affinity.h"
69 #include "util/pfm.h"
70 #include "asm/bug.h"
71
72 #include <linux/time64.h>
73 #include <linux/zalloc.h>
74 #include <api/fs/fs.h>
75 #include <errno.h>
76 #include <signal.h>
77 #include <stdlib.h>
78 #include <sys/prctl.h>
79 #include <inttypes.h>
80 #include <locale.h>
81 #include <math.h>
82 #include <sys/types.h>
83 #include <sys/stat.h>
84 #include <sys/wait.h>
85 #include <unistd.h>
86 #include <sys/time.h>
87 #include <sys/resource.h>
88 #include <linux/err.h>
89
90 #include <linux/ctype.h>
91 #include <perf/evlist.h>
92
93 #define DEFAULT_SEPARATOR       " "
94 #define FREEZE_ON_SMI_PATH      "devices/cpu/freeze_on_smi"
95
96 static void print_counters(struct timespec *ts, int argc, const char **argv);
97
98 /* Default events used for perf stat -T */
99 static const char *transaction_attrs = {
100         "task-clock,"
101         "{"
102         "instructions,"
103         "cycles,"
104         "cpu/cycles-t/,"
105         "cpu/tx-start/,"
106         "cpu/el-start/,"
107         "cpu/cycles-ct/"
108         "}"
109 };
110
111 /* More limited version when the CPU does not have all events. */
112 static const char * transaction_limited_attrs = {
113         "task-clock,"
114         "{"
115         "instructions,"
116         "cycles,"
117         "cpu/cycles-t/,"
118         "cpu/tx-start/"
119         "}"
120 };
121
122 static const char * topdown_attrs[] = {
123         "topdown-total-slots",
124         "topdown-slots-retired",
125         "topdown-recovery-bubbles",
126         "topdown-fetch-bubbles",
127         "topdown-slots-issued",
128         NULL,
129 };
130
131 static const char *topdown_metric_attrs[] = {
132         "slots",
133         "topdown-retiring",
134         "topdown-bad-spec",
135         "topdown-fe-bound",
136         "topdown-be-bound",
137         NULL,
138 };
139
140 static const char *smi_cost_attrs = {
141         "{"
142         "msr/aperf/,"
143         "msr/smi/,"
144         "cycles"
145         "}"
146 };
147
148 static struct evlist    *evsel_list;
149
150 static struct target target = {
151         .uid    = UINT_MAX,
152 };
153
154 #define METRIC_ONLY_LEN 20
155
156 static volatile pid_t           child_pid                       = -1;
157 static int                      detailed_run                    =  0;
158 static bool                     transaction_run;
159 static bool                     topdown_run                     = false;
160 static bool                     smi_cost                        = false;
161 static bool                     smi_reset                       = false;
162 static int                      big_num_opt                     =  -1;
163 static bool                     group                           = false;
164 static const char               *pre_cmd                        = NULL;
165 static const char               *post_cmd                       = NULL;
166 static bool                     sync_run                        = false;
167 static bool                     forever                         = false;
168 static bool                     force_metric_only               = false;
169 static struct timespec          ref_time;
170 static bool                     append_file;
171 static bool                     interval_count;
172 static const char               *output_name;
173 static int                      output_fd;
174
175 struct perf_stat {
176         bool                     record;
177         struct perf_data         data;
178         struct perf_session     *session;
179         u64                      bytes_written;
180         struct perf_tool         tool;
181         bool                     maps_allocated;
182         struct perf_cpu_map     *cpus;
183         struct perf_thread_map *threads;
184         enum aggr_mode           aggr_mode;
185 };
186
187 static struct perf_stat         perf_stat;
188 #define STAT_RECORD             perf_stat.record
189
190 static volatile int done = 0;
191
192 static struct perf_stat_config stat_config = {
193         .aggr_mode              = AGGR_GLOBAL,
194         .scale                  = true,
195         .unit_width             = 4, /* strlen("unit") */
196         .run_count              = 1,
197         .metric_only_len        = METRIC_ONLY_LEN,
198         .walltime_nsecs_stats   = &walltime_nsecs_stats,
199         .big_num                = true,
200         .ctl_fd                 = -1,
201         .ctl_fd_ack             = -1
202 };
203
204 static bool cpus_map_matched(struct evsel *a, struct evsel *b)
205 {
206         if (!a->core.cpus && !b->core.cpus)
207                 return true;
208
209         if (!a->core.cpus || !b->core.cpus)
210                 return false;
211
212         if (a->core.cpus->nr != b->core.cpus->nr)
213                 return false;
214
215         for (int i = 0; i < a->core.cpus->nr; i++) {
216                 if (a->core.cpus->map[i] != b->core.cpus->map[i])
217                         return false;
218         }
219
220         return true;
221 }
222
223 static void evlist__check_cpu_maps(struct evlist *evlist)
224 {
225         struct evsel *evsel, *pos, *leader;
226         char buf[1024];
227
228         evlist__for_each_entry(evlist, evsel) {
229                 leader = evsel->leader;
230
231                 /* Check that leader matches cpus with each member. */
232                 if (leader == evsel)
233                         continue;
234                 if (cpus_map_matched(leader, evsel))
235                         continue;
236
237                 /* If there's mismatch disable the group and warn user. */
238                 WARN_ONCE(1, "WARNING: grouped events cpus do not match, disabling group:\n");
239                 evsel__group_desc(leader, buf, sizeof(buf));
240                 pr_warning("  %s\n", buf);
241
242                 if (verbose) {
243                         cpu_map__snprint(leader->core.cpus, buf, sizeof(buf));
244                         pr_warning("     %s: %s\n", leader->name, buf);
245                         cpu_map__snprint(evsel->core.cpus, buf, sizeof(buf));
246                         pr_warning("     %s: %s\n", evsel->name, buf);
247                 }
248
249                 for_each_group_evsel(pos, leader) {
250                         pos->leader = pos;
251                         pos->core.nr_members = 0;
252                 }
253                 evsel->leader->core.nr_members = 0;
254         }
255 }
256
257 static inline void diff_timespec(struct timespec *r, struct timespec *a,
258                                  struct timespec *b)
259 {
260         r->tv_sec = a->tv_sec - b->tv_sec;
261         if (a->tv_nsec < b->tv_nsec) {
262                 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
263                 r->tv_sec--;
264         } else {
265                 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
266         }
267 }
268
269 static void perf_stat__reset_stats(void)
270 {
271         int i;
272
273         evlist__reset_stats(evsel_list);
274         perf_stat__reset_shadow_stats();
275
276         for (i = 0; i < stat_config.stats_num; i++)
277                 perf_stat__reset_shadow_per_stat(&stat_config.stats[i]);
278 }
279
280 static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
281                                      union perf_event *event,
282                                      struct perf_sample *sample __maybe_unused,
283                                      struct machine *machine __maybe_unused)
284 {
285         if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) {
286                 pr_err("failed to write perf data, error: %m\n");
287                 return -1;
288         }
289
290         perf_stat.bytes_written += event->header.size;
291         return 0;
292 }
293
294 static int write_stat_round_event(u64 tm, u64 type)
295 {
296         return perf_event__synthesize_stat_round(NULL, tm, type,
297                                                  process_synthesized_event,
298                                                  NULL);
299 }
300
301 #define WRITE_STAT_ROUND_EVENT(time, interval) \
302         write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
303
304 #define SID(e, x, y) xyarray__entry(e->core.sample_id, x, y)
305
306 static int evsel__write_stat_event(struct evsel *counter, u32 cpu, u32 thread,
307                                    struct perf_counts_values *count)
308 {
309         struct perf_sample_id *sid = SID(counter, cpu, thread);
310
311         return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
312                                            process_synthesized_event, NULL);
313 }
314
315 static int read_single_counter(struct evsel *counter, int cpu,
316                                int thread, struct timespec *rs)
317 {
318         if (counter->tool_event == PERF_TOOL_DURATION_TIME) {
319                 u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL;
320                 struct perf_counts_values *count =
321                         perf_counts(counter->counts, cpu, thread);
322                 count->ena = count->run = val;
323                 count->val = val;
324                 return 0;
325         }
326         return evsel__read_counter(counter, cpu, thread);
327 }
328
329 /*
330  * Read out the results of a single counter:
331  * do not aggregate counts across CPUs in system-wide mode
332  */
333 static int read_counter_cpu(struct evsel *counter, struct timespec *rs, int cpu)
334 {
335         int nthreads = perf_thread_map__nr(evsel_list->core.threads);
336         int thread;
337
338         if (!counter->supported)
339                 return -ENOENT;
340
341         if (counter->core.system_wide)
342                 nthreads = 1;
343
344         for (thread = 0; thread < nthreads; thread++) {
345                 struct perf_counts_values *count;
346
347                 count = perf_counts(counter->counts, cpu, thread);
348
349                 /*
350                  * The leader's group read loads data into its group members
351                  * (via evsel__read_counter()) and sets their count->loaded.
352                  */
353                 if (!perf_counts__is_loaded(counter->counts, cpu, thread) &&
354                     read_single_counter(counter, cpu, thread, rs)) {
355                         counter->counts->scaled = -1;
356                         perf_counts(counter->counts, cpu, thread)->ena = 0;
357                         perf_counts(counter->counts, cpu, thread)->run = 0;
358                         return -1;
359                 }
360
361                 perf_counts__set_loaded(counter->counts, cpu, thread, false);
362
363                 if (STAT_RECORD) {
364                         if (evsel__write_stat_event(counter, cpu, thread, count)) {
365                                 pr_err("failed to write stat event\n");
366                                 return -1;
367                         }
368                 }
369
370                 if (verbose > 1) {
371                         fprintf(stat_config.output,
372                                 "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
373                                         evsel__name(counter),
374                                         cpu,
375                                         count->val, count->ena, count->run);
376                 }
377         }
378
379         return 0;
380 }
381
382 static int read_affinity_counters(struct timespec *rs)
383 {
384         struct evsel *counter;
385         struct affinity affinity;
386         int i, ncpus, cpu;
387
388         if (affinity__setup(&affinity) < 0)
389                 return -1;
390
391         ncpus = perf_cpu_map__nr(evsel_list->core.all_cpus);
392         if (!target__has_cpu(&target) || target__has_per_thread(&target))
393                 ncpus = 1;
394         evlist__for_each_cpu(evsel_list, i, cpu) {
395                 if (i >= ncpus)
396                         break;
397                 affinity__set(&affinity, cpu);
398
399                 evlist__for_each_entry(evsel_list, counter) {
400                         if (evsel__cpu_iter_skip(counter, cpu))
401                                 continue;
402                         if (!counter->err) {
403                                 counter->err = read_counter_cpu(counter, rs,
404                                                                 counter->cpu_iter - 1);
405                         }
406                 }
407         }
408         affinity__cleanup(&affinity);
409         return 0;
410 }
411
412 static void read_counters(struct timespec *rs)
413 {
414         struct evsel *counter;
415
416         if (!stat_config.stop_read_counter && (read_affinity_counters(rs) < 0))
417                 return;
418
419         evlist__for_each_entry(evsel_list, counter) {
420                 if (counter->err)
421                         pr_debug("failed to read counter %s\n", counter->name);
422                 if (counter->err == 0 && perf_stat_process_counter(&stat_config, counter))
423                         pr_warning("failed to process counter %s\n", counter->name);
424                 counter->err = 0;
425         }
426 }
427
428 static int runtime_stat_new(struct perf_stat_config *config, int nthreads)
429 {
430         int i;
431
432         config->stats = calloc(nthreads, sizeof(struct runtime_stat));
433         if (!config->stats)
434                 return -1;
435
436         config->stats_num = nthreads;
437
438         for (i = 0; i < nthreads; i++)
439                 runtime_stat__init(&config->stats[i]);
440
441         return 0;
442 }
443
444 static void runtime_stat_delete(struct perf_stat_config *config)
445 {
446         int i;
447
448         if (!config->stats)
449                 return;
450
451         for (i = 0; i < config->stats_num; i++)
452                 runtime_stat__exit(&config->stats[i]);
453
454         zfree(&config->stats);
455 }
456
457 static void runtime_stat_reset(struct perf_stat_config *config)
458 {
459         int i;
460
461         if (!config->stats)
462                 return;
463
464         for (i = 0; i < config->stats_num; i++)
465                 perf_stat__reset_shadow_per_stat(&config->stats[i]);
466 }
467
468 static void process_interval(void)
469 {
470         struct timespec ts, rs;
471
472         clock_gettime(CLOCK_MONOTONIC, &ts);
473         diff_timespec(&rs, &ts, &ref_time);
474
475         perf_stat__reset_shadow_per_stat(&rt_stat);
476         runtime_stat_reset(&stat_config);
477         read_counters(&rs);
478
479         if (STAT_RECORD) {
480                 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
481                         pr_err("failed to write stat round event\n");
482         }
483
484         init_stats(&walltime_nsecs_stats);
485         update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000ULL);
486         print_counters(&rs, 0, NULL);
487 }
488
489 static bool handle_interval(unsigned int interval, int *times)
490 {
491         if (interval) {
492                 process_interval();
493                 if (interval_count && !(--(*times)))
494                         return true;
495         }
496         return false;
497 }
498
499 static void enable_counters(void)
500 {
501         if (stat_config.initial_delay < 0) {
502                 pr_info(EVLIST_DISABLED_MSG);
503                 return;
504         }
505
506         if (stat_config.initial_delay > 0) {
507                 pr_info(EVLIST_DISABLED_MSG);
508                 usleep(stat_config.initial_delay * USEC_PER_MSEC);
509         }
510
511         /*
512          * We need to enable counters only if:
513          * - we don't have tracee (attaching to task or cpu)
514          * - we have initial delay configured
515          */
516         if (!target__none(&target) || stat_config.initial_delay) {
517                 evlist__enable(evsel_list);
518                 if (stat_config.initial_delay > 0)
519                         pr_info(EVLIST_ENABLED_MSG);
520         }
521 }
522
523 static void disable_counters(void)
524 {
525         /*
526          * If we don't have tracee (attaching to task or cpu), counters may
527          * still be running. To get accurate group ratios, we must stop groups
528          * from counting before reading their constituent counters.
529          */
530         if (!target__none(&target))
531                 evlist__disable(evsel_list);
532 }
533
534 static volatile int workload_exec_errno;
535
536 /*
537  * evlist__prepare_workload will send a SIGUSR1
538  * if the fork fails, since we asked by setting its
539  * want_signal to true.
540  */
541 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
542                                         void *ucontext __maybe_unused)
543 {
544         workload_exec_errno = info->si_value.sival_int;
545 }
546
547 static bool evsel__should_store_id(struct evsel *counter)
548 {
549         return STAT_RECORD || counter->core.attr.read_format & PERF_FORMAT_ID;
550 }
551
552 static bool is_target_alive(struct target *_target,
553                             struct perf_thread_map *threads)
554 {
555         struct stat st;
556         int i;
557
558         if (!target__has_task(_target))
559                 return true;
560
561         for (i = 0; i < threads->nr; i++) {
562                 char path[PATH_MAX];
563
564                 scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(),
565                           threads->map[i].pid);
566
567                 if (!stat(path, &st))
568                         return true;
569         }
570
571         return false;
572 }
573
574 static void process_evlist(struct evlist *evlist, unsigned int interval)
575 {
576         enum evlist_ctl_cmd cmd = EVLIST_CTL_CMD_UNSUPPORTED;
577
578         if (evlist__ctlfd_process(evlist, &cmd) > 0) {
579                 switch (cmd) {
580                 case EVLIST_CTL_CMD_ENABLE:
581                         pr_info(EVLIST_ENABLED_MSG);
582                         if (interval)
583                                 process_interval();
584                         break;
585                 case EVLIST_CTL_CMD_DISABLE:
586                         if (interval)
587                                 process_interval();
588                         pr_info(EVLIST_DISABLED_MSG);
589                         break;
590                 case EVLIST_CTL_CMD_SNAPSHOT:
591                 case EVLIST_CTL_CMD_ACK:
592                 case EVLIST_CTL_CMD_UNSUPPORTED:
593                 default:
594                         break;
595                 }
596         }
597 }
598
599 static void compute_tts(struct timespec *time_start, struct timespec *time_stop,
600                         int *time_to_sleep)
601 {
602         int tts = *time_to_sleep;
603         struct timespec time_diff;
604
605         diff_timespec(&time_diff, time_stop, time_start);
606
607         tts -= time_diff.tv_sec * MSEC_PER_SEC +
608                time_diff.tv_nsec / NSEC_PER_MSEC;
609
610         if (tts < 0)
611                 tts = 0;
612
613         *time_to_sleep = tts;
614 }
615
616 static int dispatch_events(bool forks, int timeout, int interval, int *times)
617 {
618         int child_exited = 0, status = 0;
619         int time_to_sleep, sleep_time;
620         struct timespec time_start, time_stop;
621
622         if (interval)
623                 sleep_time = interval;
624         else if (timeout)
625                 sleep_time = timeout;
626         else
627                 sleep_time = 1000;
628
629         time_to_sleep = sleep_time;
630
631         while (!done) {
632                 if (forks)
633                         child_exited = waitpid(child_pid, &status, WNOHANG);
634                 else
635                         child_exited = !is_target_alive(&target, evsel_list->core.threads) ? 1 : 0;
636
637                 if (child_exited)
638                         break;
639
640                 clock_gettime(CLOCK_MONOTONIC, &time_start);
641                 if (!(evlist__poll(evsel_list, time_to_sleep) > 0)) { /* poll timeout or EINTR */
642                         if (timeout || handle_interval(interval, times))
643                                 break;
644                         time_to_sleep = sleep_time;
645                 } else { /* fd revent */
646                         process_evlist(evsel_list, interval);
647                         clock_gettime(CLOCK_MONOTONIC, &time_stop);
648                         compute_tts(&time_start, &time_stop, &time_to_sleep);
649                 }
650         }
651
652         return status;
653 }
654
655 enum counter_recovery {
656         COUNTER_SKIP,
657         COUNTER_RETRY,
658         COUNTER_FATAL,
659 };
660
661 static enum counter_recovery stat_handle_error(struct evsel *counter)
662 {
663         char msg[BUFSIZ];
664         /*
665          * PPC returns ENXIO for HW counters until 2.6.37
666          * (behavior changed with commit b0a873e).
667          */
668         if (errno == EINVAL || errno == ENOSYS ||
669             errno == ENOENT || errno == EOPNOTSUPP ||
670             errno == ENXIO) {
671                 if (verbose > 0)
672                         ui__warning("%s event is not supported by the kernel.\n",
673                                     evsel__name(counter));
674                 counter->supported = false;
675                 /*
676                  * errored is a sticky flag that means one of the counter's
677                  * cpu event had a problem and needs to be reexamined.
678                  */
679                 counter->errored = true;
680
681                 if ((counter->leader != counter) ||
682                     !(counter->leader->core.nr_members > 1))
683                         return COUNTER_SKIP;
684         } else if (evsel__fallback(counter, errno, msg, sizeof(msg))) {
685                 if (verbose > 0)
686                         ui__warning("%s\n", msg);
687                 return COUNTER_RETRY;
688         } else if (target__has_per_thread(&target) &&
689                    evsel_list->core.threads &&
690                    evsel_list->core.threads->err_thread != -1) {
691                 /*
692                  * For global --per-thread case, skip current
693                  * error thread.
694                  */
695                 if (!thread_map__remove(evsel_list->core.threads,
696                                         evsel_list->core.threads->err_thread)) {
697                         evsel_list->core.threads->err_thread = -1;
698                         return COUNTER_RETRY;
699                 }
700         }
701
702         evsel__open_strerror(counter, &target, errno, msg, sizeof(msg));
703         ui__error("%s\n", msg);
704
705         if (child_pid != -1)
706                 kill(child_pid, SIGTERM);
707         return COUNTER_FATAL;
708 }
709
710 static int __run_perf_stat(int argc, const char **argv, int run_idx)
711 {
712         int interval = stat_config.interval;
713         int times = stat_config.times;
714         int timeout = stat_config.timeout;
715         char msg[BUFSIZ];
716         unsigned long long t0, t1;
717         struct evsel *counter;
718         size_t l;
719         int status = 0;
720         const bool forks = (argc > 0);
721         bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false;
722         struct affinity affinity;
723         int i, cpu;
724         bool second_pass = false;
725
726         if (forks) {
727                 if (evlist__prepare_workload(evsel_list, &target, argv, is_pipe, workload_exec_failed_signal) < 0) {
728                         perror("failed to prepare workload");
729                         return -1;
730                 }
731                 child_pid = evsel_list->workload.pid;
732         }
733
734         if (group)
735                 evlist__set_leader(evsel_list);
736
737         if (affinity__setup(&affinity) < 0)
738                 return -1;
739
740         evlist__for_each_cpu (evsel_list, i, cpu) {
741                 affinity__set(&affinity, cpu);
742
743                 evlist__for_each_entry(evsel_list, counter) {
744                         if (evsel__cpu_iter_skip(counter, cpu))
745                                 continue;
746                         if (counter->reset_group || counter->errored)
747                                 continue;
748 try_again:
749                         if (create_perf_stat_counter(counter, &stat_config, &target,
750                                                      counter->cpu_iter - 1) < 0) {
751
752                                 /*
753                                  * Weak group failed. We cannot just undo this here
754                                  * because earlier CPUs might be in group mode, and the kernel
755                                  * doesn't support mixing group and non group reads. Defer
756                                  * it to later.
757                                  * Don't close here because we're in the wrong affinity.
758                                  */
759                                 if ((errno == EINVAL || errno == EBADF) &&
760                                     counter->leader != counter &&
761                                     counter->weak_group) {
762                                         evlist__reset_weak_group(evsel_list, counter, false);
763                                         assert(counter->reset_group);
764                                         second_pass = true;
765                                         continue;
766                                 }
767
768                                 switch (stat_handle_error(counter)) {
769                                 case COUNTER_FATAL:
770                                         return -1;
771                                 case COUNTER_RETRY:
772                                         goto try_again;
773                                 case COUNTER_SKIP:
774                                         continue;
775                                 default:
776                                         break;
777                                 }
778
779                         }
780                         counter->supported = true;
781                 }
782         }
783
784         if (second_pass) {
785                 /*
786                  * Now redo all the weak group after closing them,
787                  * and also close errored counters.
788                  */
789
790                 evlist__for_each_cpu(evsel_list, i, cpu) {
791                         affinity__set(&affinity, cpu);
792                         /* First close errored or weak retry */
793                         evlist__for_each_entry(evsel_list, counter) {
794                                 if (!counter->reset_group && !counter->errored)
795                                         continue;
796                                 if (evsel__cpu_iter_skip_no_inc(counter, cpu))
797                                         continue;
798                                 perf_evsel__close_cpu(&counter->core, counter->cpu_iter);
799                         }
800                         /* Now reopen weak */
801                         evlist__for_each_entry(evsel_list, counter) {
802                                 if (!counter->reset_group && !counter->errored)
803                                         continue;
804                                 if (evsel__cpu_iter_skip(counter, cpu))
805                                         continue;
806                                 if (!counter->reset_group)
807                                         continue;
808 try_again_reset:
809                                 pr_debug2("reopening weak %s\n", evsel__name(counter));
810                                 if (create_perf_stat_counter(counter, &stat_config, &target,
811                                                              counter->cpu_iter - 1) < 0) {
812
813                                         switch (stat_handle_error(counter)) {
814                                         case COUNTER_FATAL:
815                                                 return -1;
816                                         case COUNTER_RETRY:
817                                                 goto try_again_reset;
818                                         case COUNTER_SKIP:
819                                                 continue;
820                                         default:
821                                                 break;
822                                         }
823                                 }
824                                 counter->supported = true;
825                         }
826                 }
827         }
828         affinity__cleanup(&affinity);
829
830         evlist__for_each_entry(evsel_list, counter) {
831                 if (!counter->supported) {
832                         perf_evsel__free_fd(&counter->core);
833                         continue;
834                 }
835
836                 l = strlen(counter->unit);
837                 if (l > stat_config.unit_width)
838                         stat_config.unit_width = l;
839
840                 if (evsel__should_store_id(counter) &&
841                     evsel__store_ids(counter, evsel_list))
842                         return -1;
843         }
844
845         if (evlist__apply_filters(evsel_list, &counter)) {
846                 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
847                         counter->filter, evsel__name(counter), errno,
848                         str_error_r(errno, msg, sizeof(msg)));
849                 return -1;
850         }
851
852         if (STAT_RECORD) {
853                 int err, fd = perf_data__fd(&perf_stat.data);
854
855                 if (is_pipe) {
856                         err = perf_header__write_pipe(perf_data__fd(&perf_stat.data));
857                 } else {
858                         err = perf_session__write_header(perf_stat.session, evsel_list,
859                                                          fd, false);
860                 }
861
862                 if (err < 0)
863                         return err;
864
865                 err = perf_event__synthesize_stat_events(&stat_config, NULL, evsel_list,
866                                                          process_synthesized_event, is_pipe);
867                 if (err < 0)
868                         return err;
869         }
870
871         /*
872          * Enable counters and exec the command:
873          */
874         t0 = rdclock();
875         clock_gettime(CLOCK_MONOTONIC, &ref_time);
876
877         if (forks) {
878                 evlist__start_workload(evsel_list);
879                 enable_counters();
880
881                 if (interval || timeout || evlist__ctlfd_initialized(evsel_list))
882                         status = dispatch_events(forks, timeout, interval, &times);
883                 if (child_pid != -1) {
884                         if (timeout)
885                                 kill(child_pid, SIGTERM);
886                         wait4(child_pid, &status, 0, &stat_config.ru_data);
887                 }
888
889                 if (workload_exec_errno) {
890                         const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
891                         pr_err("Workload failed: %s\n", emsg);
892                         return -1;
893                 }
894
895                 if (WIFSIGNALED(status))
896                         psignal(WTERMSIG(status), argv[0]);
897         } else {
898                 enable_counters();
899                 status = dispatch_events(forks, timeout, interval, &times);
900         }
901
902         disable_counters();
903
904         t1 = rdclock();
905
906         if (stat_config.walltime_run_table)
907                 stat_config.walltime_run[run_idx] = t1 - t0;
908
909         if (interval && stat_config.summary) {
910                 stat_config.interval = 0;
911                 stat_config.stop_read_counter = true;
912                 init_stats(&walltime_nsecs_stats);
913                 update_stats(&walltime_nsecs_stats, t1 - t0);
914
915                 if (stat_config.aggr_mode == AGGR_GLOBAL)
916                         evlist__save_aggr_prev_raw_counts(evsel_list);
917
918                 evlist__copy_prev_raw_counts(evsel_list);
919                 evlist__reset_prev_raw_counts(evsel_list);
920                 runtime_stat_reset(&stat_config);
921                 perf_stat__reset_shadow_per_stat(&rt_stat);
922         } else
923                 update_stats(&walltime_nsecs_stats, t1 - t0);
924
925         /*
926          * Closing a group leader splits the group, and as we only disable
927          * group leaders, results in remaining events becoming enabled. To
928          * avoid arbitrary skew, we must read all counters before closing any
929          * group leaders.
930          */
931         read_counters(&(struct timespec) { .tv_nsec = t1-t0 });
932
933         /*
934          * We need to keep evsel_list alive, because it's processed
935          * later the evsel_list will be closed after.
936          */
937         if (!STAT_RECORD)
938                 evlist__close(evsel_list);
939
940         return WEXITSTATUS(status);
941 }
942
943 static int run_perf_stat(int argc, const char **argv, int run_idx)
944 {
945         int ret;
946
947         if (pre_cmd) {
948                 ret = system(pre_cmd);
949                 if (ret)
950                         return ret;
951         }
952
953         if (sync_run)
954                 sync();
955
956         ret = __run_perf_stat(argc, argv, run_idx);
957         if (ret)
958                 return ret;
959
960         if (post_cmd) {
961                 ret = system(post_cmd);
962                 if (ret)
963                         return ret;
964         }
965
966         return ret;
967 }
968
969 static void print_counters(struct timespec *ts, int argc, const char **argv)
970 {
971         /* Do not print anything if we record to the pipe. */
972         if (STAT_RECORD && perf_stat.data.is_pipe)
973                 return;
974         if (stat_config.quiet)
975                 return;
976
977         evlist__print_counters(evsel_list, &stat_config, &target, ts, argc, argv);
978 }
979
980 static volatile int signr = -1;
981
982 static void skip_signal(int signo)
983 {
984         if ((child_pid == -1) || stat_config.interval)
985                 done = 1;
986
987         signr = signo;
988         /*
989          * render child_pid harmless
990          * won't send SIGTERM to a random
991          * process in case of race condition
992          * and fast PID recycling
993          */
994         child_pid = -1;
995 }
996
997 static void sig_atexit(void)
998 {
999         sigset_t set, oset;
1000
1001         /*
1002          * avoid race condition with SIGCHLD handler
1003          * in skip_signal() which is modifying child_pid
1004          * goal is to avoid send SIGTERM to a random
1005          * process
1006          */
1007         sigemptyset(&set);
1008         sigaddset(&set, SIGCHLD);
1009         sigprocmask(SIG_BLOCK, &set, &oset);
1010
1011         if (child_pid != -1)
1012                 kill(child_pid, SIGTERM);
1013
1014         sigprocmask(SIG_SETMASK, &oset, NULL);
1015
1016         if (signr == -1)
1017                 return;
1018
1019         signal(signr, SIG_DFL);
1020         kill(getpid(), signr);
1021 }
1022
1023 void perf_stat__set_big_num(int set)
1024 {
1025         stat_config.big_num = (set != 0);
1026 }
1027
1028 static int stat__set_big_num(const struct option *opt __maybe_unused,
1029                              const char *s __maybe_unused, int unset)
1030 {
1031         big_num_opt = unset ? 0 : 1;
1032         perf_stat__set_big_num(!unset);
1033         return 0;
1034 }
1035
1036 static int enable_metric_only(const struct option *opt __maybe_unused,
1037                               const char *s __maybe_unused, int unset)
1038 {
1039         force_metric_only = true;
1040         stat_config.metric_only = !unset;
1041         return 0;
1042 }
1043
1044 static int parse_metric_groups(const struct option *opt,
1045                                const char *str,
1046                                int unset __maybe_unused)
1047 {
1048         return metricgroup__parse_groups(opt, str,
1049                                          stat_config.metric_no_group,
1050                                          stat_config.metric_no_merge,
1051                                          &stat_config.metric_events);
1052 }
1053
1054 static int parse_control_option(const struct option *opt,
1055                                 const char *str,
1056                                 int unset __maybe_unused)
1057 {
1058         struct perf_stat_config *config = opt->value;
1059
1060         return evlist__parse_control(str, &config->ctl_fd, &config->ctl_fd_ack, &config->ctl_fd_close);
1061 }
1062
1063 static int parse_stat_cgroups(const struct option *opt,
1064                               const char *str, int unset)
1065 {
1066         if (stat_config.cgroup_list) {
1067                 pr_err("--cgroup and --for-each-cgroup cannot be used together\n");
1068                 return -1;
1069         }
1070
1071         return parse_cgroups(opt, str, unset);
1072 }
1073
1074 static struct option stat_options[] = {
1075         OPT_BOOLEAN('T', "transaction", &transaction_run,
1076                     "hardware transaction statistics"),
1077         OPT_CALLBACK('e', "event", &evsel_list, "event",
1078                      "event selector. use 'perf list' to list available events",
1079                      parse_events_option),
1080         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1081                      "event filter", parse_filter),
1082         OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit,
1083                     "child tasks do not inherit counters"),
1084         OPT_STRING('p', "pid", &target.pid, "pid",
1085                    "stat events on existing process id"),
1086         OPT_STRING('t', "tid", &target.tid, "tid",
1087                    "stat events on existing thread id"),
1088         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1089                     "system-wide collection from all CPUs"),
1090         OPT_BOOLEAN('g', "group", &group,
1091                     "put the counters into a counter group"),
1092         OPT_BOOLEAN(0, "scale", &stat_config.scale,
1093                     "Use --no-scale to disable counter scaling for multiplexing"),
1094         OPT_INCR('v', "verbose", &verbose,
1095                     "be more verbose (show counter open errors, etc)"),
1096         OPT_INTEGER('r', "repeat", &stat_config.run_count,
1097                     "repeat command and print average + stddev (max: 100, forever: 0)"),
1098         OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table,
1099                     "display details about each run (only with -r option)"),
1100         OPT_BOOLEAN('n', "null", &stat_config.null_run,
1101                     "null run - dont start any counters"),
1102         OPT_INCR('d', "detailed", &detailed_run,
1103                     "detailed run - start a lot of events"),
1104         OPT_BOOLEAN('S', "sync", &sync_run,
1105                     "call sync() before starting a run"),
1106         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1107                            "print large numbers with thousands\' separators",
1108                            stat__set_big_num),
1109         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1110                     "list of cpus to monitor in system-wide"),
1111         OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
1112                     "disable CPU count aggregation", AGGR_NONE),
1113         OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"),
1114         OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator",
1115                    "print counts with custom separator"),
1116         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1117                      "monitor event in cgroup name only", parse_stat_cgroups),
1118         OPT_STRING(0, "for-each-cgroup", &stat_config.cgroup_list, "name",
1119                     "expand events for each cgroup"),
1120         OPT_STRING('o', "output", &output_name, "file", "output file name"),
1121         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1122         OPT_INTEGER(0, "log-fd", &output_fd,
1123                     "log output to fd, instead of stderr"),
1124         OPT_STRING(0, "pre", &pre_cmd, "command",
1125                         "command to run prior to the measured command"),
1126         OPT_STRING(0, "post", &post_cmd, "command",
1127                         "command to run after to the measured command"),
1128         OPT_UINTEGER('I', "interval-print", &stat_config.interval,
1129                     "print counts at regular interval in ms "
1130                     "(overhead is possible for values <= 100ms)"),
1131         OPT_INTEGER(0, "interval-count", &stat_config.times,
1132                     "print counts for fixed number of times"),
1133         OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear,
1134                     "clear screen in between new interval"),
1135         OPT_UINTEGER(0, "timeout", &stat_config.timeout,
1136                     "stop workload and print counts after a timeout period in ms (>= 10ms)"),
1137         OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
1138                      "aggregate counts per processor socket", AGGR_SOCKET),
1139         OPT_SET_UINT(0, "per-die", &stat_config.aggr_mode,
1140                      "aggregate counts per processor die", AGGR_DIE),
1141         OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
1142                      "aggregate counts per physical processor core", AGGR_CORE),
1143         OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
1144                      "aggregate counts per thread", AGGR_THREAD),
1145         OPT_SET_UINT(0, "per-node", &stat_config.aggr_mode,
1146                      "aggregate counts per numa node", AGGR_NODE),
1147         OPT_INTEGER('D', "delay", &stat_config.initial_delay,
1148                     "ms to wait before starting measurement after program start (-1: start with events disabled)"),
1149         OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL,
1150                         "Only print computed metrics. No raw values", enable_metric_only),
1151         OPT_BOOLEAN(0, "metric-no-group", &stat_config.metric_no_group,
1152                        "don't group metric events, impacts multiplexing"),
1153         OPT_BOOLEAN(0, "metric-no-merge", &stat_config.metric_no_merge,
1154                        "don't try to share events between metrics in a group"),
1155         OPT_BOOLEAN(0, "topdown", &topdown_run,
1156                         "measure topdown level 1 statistics"),
1157         OPT_BOOLEAN(0, "smi-cost", &smi_cost,
1158                         "measure SMI cost"),
1159         OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
1160                      "monitor specified metrics or metric groups (separated by ,)",
1161                      parse_metric_groups),
1162         OPT_BOOLEAN_FLAG(0, "all-kernel", &stat_config.all_kernel,
1163                          "Configure all used events to run in kernel space.",
1164                          PARSE_OPT_EXCLUSIVE),
1165         OPT_BOOLEAN_FLAG(0, "all-user", &stat_config.all_user,
1166                          "Configure all used events to run in user space.",
1167                          PARSE_OPT_EXCLUSIVE),
1168         OPT_BOOLEAN(0, "percore-show-thread", &stat_config.percore_show_thread,
1169                     "Use with 'percore' event qualifier to show the event "
1170                     "counts of one hardware thread by sum up total hardware "
1171                     "threads of same physical core"),
1172         OPT_BOOLEAN(0, "summary", &stat_config.summary,
1173                        "print summary for interval mode"),
1174         OPT_BOOLEAN(0, "quiet", &stat_config.quiet,
1175                         "don't print output (useful with record)"),
1176 #ifdef HAVE_LIBPFM
1177         OPT_CALLBACK(0, "pfm-events", &evsel_list, "event",
1178                 "libpfm4 event selector. use 'perf list' to list available events",
1179                 parse_libpfm_events_option),
1180 #endif
1181         OPT_CALLBACK(0, "control", &stat_config, "fd:ctl-fd[,ack-fd] or fifo:ctl-fifo[,ack-fifo]",
1182                      "Listen on ctl-fd descriptor for command to control measurement ('enable': enable events, 'disable': disable events).\n"
1183                      "\t\t\t  Optionally send control command completion ('ack\\n') to ack-fd descriptor.\n"
1184                      "\t\t\t  Alternatively, ctl-fifo / ack-fifo will be opened and used as ctl-fd / ack-fd.",
1185                       parse_control_option),
1186         OPT_END()
1187 };
1188
1189 static struct aggr_cpu_id perf_stat__get_socket(struct perf_stat_config *config __maybe_unused,
1190                                  struct perf_cpu_map *map, int cpu)
1191 {
1192         return cpu_map__get_socket(map, cpu, NULL);
1193 }
1194
1195 static struct aggr_cpu_id perf_stat__get_die(struct perf_stat_config *config __maybe_unused,
1196                               struct perf_cpu_map *map, int cpu)
1197 {
1198         return cpu_map__get_die(map, cpu, NULL);
1199 }
1200
1201 static struct aggr_cpu_id perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
1202                                struct perf_cpu_map *map, int cpu)
1203 {
1204         return cpu_map__get_core(map, cpu, NULL);
1205 }
1206
1207 static struct aggr_cpu_id perf_stat__get_node(struct perf_stat_config *config __maybe_unused,
1208                                struct perf_cpu_map *map, int cpu)
1209 {
1210         return cpu_map__get_node(map, cpu, NULL);
1211 }
1212
1213 static struct aggr_cpu_id perf_stat__get_aggr(struct perf_stat_config *config,
1214                                aggr_get_id_t get_id, struct perf_cpu_map *map, int idx)
1215 {
1216         int cpu;
1217         struct aggr_cpu_id id = cpu_map__empty_aggr_cpu_id();
1218
1219         if (idx >= map->nr)
1220                 return id;
1221
1222         cpu = map->map[idx];
1223
1224         if (cpu_map__aggr_cpu_id_is_empty(config->cpus_aggr_map->map[cpu]))
1225                 config->cpus_aggr_map->map[cpu] = get_id(config, map, idx);
1226
1227         id = config->cpus_aggr_map->map[cpu];
1228         return id;
1229 }
1230
1231 static struct aggr_cpu_id perf_stat__get_socket_cached(struct perf_stat_config *config,
1232                                         struct perf_cpu_map *map, int idx)
1233 {
1234         return perf_stat__get_aggr(config, perf_stat__get_socket, map, idx);
1235 }
1236
1237 static struct aggr_cpu_id perf_stat__get_die_cached(struct perf_stat_config *config,
1238                                         struct perf_cpu_map *map, int idx)
1239 {
1240         return perf_stat__get_aggr(config, perf_stat__get_die, map, idx);
1241 }
1242
1243 static struct aggr_cpu_id perf_stat__get_core_cached(struct perf_stat_config *config,
1244                                       struct perf_cpu_map *map, int idx)
1245 {
1246         return perf_stat__get_aggr(config, perf_stat__get_core, map, idx);
1247 }
1248
1249 static struct aggr_cpu_id perf_stat__get_node_cached(struct perf_stat_config *config,
1250                                       struct perf_cpu_map *map, int idx)
1251 {
1252         return perf_stat__get_aggr(config, perf_stat__get_node, map, idx);
1253 }
1254
1255 static bool term_percore_set(void)
1256 {
1257         struct evsel *counter;
1258
1259         evlist__for_each_entry(evsel_list, counter) {
1260                 if (counter->percore)
1261                         return true;
1262         }
1263
1264         return false;
1265 }
1266
1267 static int perf_stat_init_aggr_mode(void)
1268 {
1269         int nr;
1270
1271         switch (stat_config.aggr_mode) {
1272         case AGGR_SOCKET:
1273                 if (cpu_map__build_socket_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1274                         perror("cannot build socket map");
1275                         return -1;
1276                 }
1277                 stat_config.aggr_get_id = perf_stat__get_socket_cached;
1278                 break;
1279         case AGGR_DIE:
1280                 if (cpu_map__build_die_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1281                         perror("cannot build die map");
1282                         return -1;
1283                 }
1284                 stat_config.aggr_get_id = perf_stat__get_die_cached;
1285                 break;
1286         case AGGR_CORE:
1287                 if (cpu_map__build_core_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1288                         perror("cannot build core map");
1289                         return -1;
1290                 }
1291                 stat_config.aggr_get_id = perf_stat__get_core_cached;
1292                 break;
1293         case AGGR_NODE:
1294                 if (cpu_map__build_node_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1295                         perror("cannot build core map");
1296                         return -1;
1297                 }
1298                 stat_config.aggr_get_id = perf_stat__get_node_cached;
1299                 break;
1300         case AGGR_NONE:
1301                 if (term_percore_set()) {
1302                         if (cpu_map__build_core_map(evsel_list->core.cpus,
1303                                                     &stat_config.aggr_map)) {
1304                                 perror("cannot build core map");
1305                                 return -1;
1306                         }
1307                         stat_config.aggr_get_id = perf_stat__get_core_cached;
1308                 }
1309                 break;
1310         case AGGR_GLOBAL:
1311         case AGGR_THREAD:
1312         case AGGR_UNSET:
1313         default:
1314                 break;
1315         }
1316
1317         /*
1318          * The evsel_list->cpus is the base we operate on,
1319          * taking the highest cpu number to be the size of
1320          * the aggregation translate cpumap.
1321          */
1322         nr = perf_cpu_map__max(evsel_list->core.cpus);
1323         stat_config.cpus_aggr_map = cpu_aggr_map__empty_new(nr + 1);
1324         return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
1325 }
1326
1327 static void cpu_aggr_map__delete(struct cpu_aggr_map *map)
1328 {
1329         if (map) {
1330                 WARN_ONCE(refcount_read(&map->refcnt) != 0,
1331                           "cpu_aggr_map refcnt unbalanced\n");
1332                 free(map);
1333         }
1334 }
1335
1336 static void cpu_aggr_map__put(struct cpu_aggr_map *map)
1337 {
1338         if (map && refcount_dec_and_test(&map->refcnt))
1339                 cpu_aggr_map__delete(map);
1340 }
1341
1342 static void perf_stat__exit_aggr_mode(void)
1343 {
1344         cpu_aggr_map__put(stat_config.aggr_map);
1345         cpu_aggr_map__put(stat_config.cpus_aggr_map);
1346         stat_config.aggr_map = NULL;
1347         stat_config.cpus_aggr_map = NULL;
1348 }
1349
1350 static inline int perf_env__get_cpu(struct perf_env *env, struct perf_cpu_map *map, int idx)
1351 {
1352         int cpu;
1353
1354         if (idx > map->nr)
1355                 return -1;
1356
1357         cpu = map->map[idx];
1358
1359         if (cpu >= env->nr_cpus_avail)
1360                 return -1;
1361
1362         return cpu;
1363 }
1364
1365 static struct aggr_cpu_id perf_env__get_socket(struct perf_cpu_map *map, int idx, void *data)
1366 {
1367         struct perf_env *env = data;
1368         int cpu = perf_env__get_cpu(env, map, idx);
1369         struct aggr_cpu_id id = cpu_map__empty_aggr_cpu_id();
1370
1371         if (cpu != -1)
1372                 id.socket = env->cpu[cpu].socket_id;
1373
1374         return id;
1375 }
1376
1377 static struct aggr_cpu_id perf_env__get_die(struct perf_cpu_map *map, int idx, void *data)
1378 {
1379         struct perf_env *env = data;
1380         struct aggr_cpu_id id = cpu_map__empty_aggr_cpu_id();
1381         int cpu = perf_env__get_cpu(env, map, idx);
1382
1383         if (cpu != -1) {
1384                 /*
1385                  * die_id is relative to socket, so start
1386                  * with the socket ID and then add die to
1387                  * make a unique ID.
1388                  */
1389                 id.socket = env->cpu[cpu].socket_id;
1390                 id.die = env->cpu[cpu].die_id;
1391         }
1392
1393         return id;
1394 }
1395
1396 static struct aggr_cpu_id perf_env__get_core(struct perf_cpu_map *map, int idx, void *data)
1397 {
1398         struct perf_env *env = data;
1399         struct aggr_cpu_id id = cpu_map__empty_aggr_cpu_id();
1400         int cpu = perf_env__get_cpu(env, map, idx);
1401
1402         if (cpu != -1) {
1403                 /*
1404                  * core_id is relative to socket and die,
1405                  * we need a global id. So we combine
1406                  * socket + die id + core id
1407                  */
1408                 if (WARN_ONCE(env->cpu[cpu].core_id >> 16, "The core id number is too big.\n"))
1409                         return cpu_map__empty_aggr_cpu_id();
1410
1411                 id.socket = env->cpu[cpu].socket_id;
1412                 id.die = env->cpu[cpu].die_id;
1413                 id.id = env->cpu[cpu].core_id & 0xffff;
1414         }
1415
1416         return id;
1417 }
1418
1419 static struct aggr_cpu_id perf_env__get_node(struct perf_cpu_map *map, int idx, void *data)
1420 {
1421         int cpu = perf_env__get_cpu(data, map, idx);
1422         struct aggr_cpu_id id = cpu_map__empty_aggr_cpu_id();
1423
1424         id.node = perf_env__numa_node(data, cpu);
1425         return id;
1426 }
1427
1428 static int perf_env__build_socket_map(struct perf_env *env, struct perf_cpu_map *cpus,
1429                                       struct cpu_aggr_map **sockp)
1430 {
1431         return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
1432 }
1433
1434 static int perf_env__build_die_map(struct perf_env *env, struct perf_cpu_map *cpus,
1435                                    struct cpu_aggr_map **diep)
1436 {
1437         return cpu_map__build_map(cpus, diep, perf_env__get_die, env);
1438 }
1439
1440 static int perf_env__build_core_map(struct perf_env *env, struct perf_cpu_map *cpus,
1441                                     struct cpu_aggr_map **corep)
1442 {
1443         return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
1444 }
1445
1446 static int perf_env__build_node_map(struct perf_env *env, struct perf_cpu_map *cpus,
1447                                     struct cpu_aggr_map **nodep)
1448 {
1449         return cpu_map__build_map(cpus, nodep, perf_env__get_node, env);
1450 }
1451
1452 static struct aggr_cpu_id perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused,
1453                                       struct perf_cpu_map *map, int idx)
1454 {
1455         return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
1456 }
1457 static struct aggr_cpu_id perf_stat__get_die_file(struct perf_stat_config *config __maybe_unused,
1458                                    struct perf_cpu_map *map, int idx)
1459 {
1460         return perf_env__get_die(map, idx, &perf_stat.session->header.env);
1461 }
1462
1463 static struct aggr_cpu_id perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused,
1464                                     struct perf_cpu_map *map, int idx)
1465 {
1466         return perf_env__get_core(map, idx, &perf_stat.session->header.env);
1467 }
1468
1469 static struct aggr_cpu_id perf_stat__get_node_file(struct perf_stat_config *config __maybe_unused,
1470                                     struct perf_cpu_map *map, int idx)
1471 {
1472         return perf_env__get_node(map, idx, &perf_stat.session->header.env);
1473 }
1474
1475 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
1476 {
1477         struct perf_env *env = &st->session->header.env;
1478
1479         switch (stat_config.aggr_mode) {
1480         case AGGR_SOCKET:
1481                 if (perf_env__build_socket_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1482                         perror("cannot build socket map");
1483                         return -1;
1484                 }
1485                 stat_config.aggr_get_id = perf_stat__get_socket_file;
1486                 break;
1487         case AGGR_DIE:
1488                 if (perf_env__build_die_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1489                         perror("cannot build die map");
1490                         return -1;
1491                 }
1492                 stat_config.aggr_get_id = perf_stat__get_die_file;
1493                 break;
1494         case AGGR_CORE:
1495                 if (perf_env__build_core_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1496                         perror("cannot build core map");
1497                         return -1;
1498                 }
1499                 stat_config.aggr_get_id = perf_stat__get_core_file;
1500                 break;
1501         case AGGR_NODE:
1502                 if (perf_env__build_node_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1503                         perror("cannot build core map");
1504                         return -1;
1505                 }
1506                 stat_config.aggr_get_id = perf_stat__get_node_file;
1507                 break;
1508         case AGGR_NONE:
1509         case AGGR_GLOBAL:
1510         case AGGR_THREAD:
1511         case AGGR_UNSET:
1512         default:
1513                 break;
1514         }
1515
1516         return 0;
1517 }
1518
1519 /*
1520  * Add default attributes, if there were no attributes specified or
1521  * if -d/--detailed, -d -d or -d -d -d is used:
1522  */
1523 static int add_default_attributes(void)
1524 {
1525         int err;
1526         struct perf_event_attr default_attrs0[] = {
1527
1528   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
1529   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
1530   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
1531   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
1532
1533   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
1534 };
1535         struct perf_event_attr frontend_attrs[] = {
1536   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1537 };
1538         struct perf_event_attr backend_attrs[] = {
1539   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
1540 };
1541         struct perf_event_attr default_attrs1[] = {
1542   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
1543   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
1544   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
1545
1546 };
1547
1548 /*
1549  * Detailed stats (-d), covering the L1 and last level data caches:
1550  */
1551         struct perf_event_attr detailed_attrs[] = {
1552
1553   { .type = PERF_TYPE_HW_CACHE,
1554     .config =
1555          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1556         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1557         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1558
1559   { .type = PERF_TYPE_HW_CACHE,
1560     .config =
1561          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1562         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1563         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1564
1565   { .type = PERF_TYPE_HW_CACHE,
1566     .config =
1567          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1568         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1569         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1570
1571   { .type = PERF_TYPE_HW_CACHE,
1572     .config =
1573          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1574         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1575         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1576 };
1577
1578 /*
1579  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1580  */
1581         struct perf_event_attr very_detailed_attrs[] = {
1582
1583   { .type = PERF_TYPE_HW_CACHE,
1584     .config =
1585          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1586         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1587         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1588
1589   { .type = PERF_TYPE_HW_CACHE,
1590     .config =
1591          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1592         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1593         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1594
1595   { .type = PERF_TYPE_HW_CACHE,
1596     .config =
1597          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1598         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1599         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1600
1601   { .type = PERF_TYPE_HW_CACHE,
1602     .config =
1603          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1604         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1605         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1606
1607   { .type = PERF_TYPE_HW_CACHE,
1608     .config =
1609          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1610         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1611         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1612
1613   { .type = PERF_TYPE_HW_CACHE,
1614     .config =
1615          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1616         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1617         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1618
1619 };
1620
1621 /*
1622  * Very, very detailed stats (-d -d -d), adding prefetch events:
1623  */
1624         struct perf_event_attr very_very_detailed_attrs[] = {
1625
1626   { .type = PERF_TYPE_HW_CACHE,
1627     .config =
1628          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1629         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1630         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1631
1632   { .type = PERF_TYPE_HW_CACHE,
1633     .config =
1634          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1635         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1636         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1637 };
1638         struct parse_events_error errinfo;
1639
1640         /* Set attrs if no event is selected and !null_run: */
1641         if (stat_config.null_run)
1642                 return 0;
1643
1644         bzero(&errinfo, sizeof(errinfo));
1645         if (transaction_run) {
1646                 /* Handle -T as -M transaction. Once platform specific metrics
1647                  * support has been added to the json files, all archictures
1648                  * will use this approach. To determine transaction support
1649                  * on an architecture test for such a metric name.
1650                  */
1651                 if (metricgroup__has_metric("transaction")) {
1652                         struct option opt = { .value = &evsel_list };
1653
1654                         return metricgroup__parse_groups(&opt, "transaction",
1655                                                          stat_config.metric_no_group,
1656                                                         stat_config.metric_no_merge,
1657                                                          &stat_config.metric_events);
1658                 }
1659
1660                 if (pmu_have_event("cpu", "cycles-ct") &&
1661                     pmu_have_event("cpu", "el-start"))
1662                         err = parse_events(evsel_list, transaction_attrs,
1663                                            &errinfo);
1664                 else
1665                         err = parse_events(evsel_list,
1666                                            transaction_limited_attrs,
1667                                            &errinfo);
1668                 if (err) {
1669                         fprintf(stderr, "Cannot set up transaction events\n");
1670                         parse_events_print_error(&errinfo, transaction_attrs);
1671                         return -1;
1672                 }
1673                 return 0;
1674         }
1675
1676         if (smi_cost) {
1677                 int smi;
1678
1679                 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
1680                         fprintf(stderr, "freeze_on_smi is not supported.\n");
1681                         return -1;
1682                 }
1683
1684                 if (!smi) {
1685                         if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) {
1686                                 fprintf(stderr, "Failed to set freeze_on_smi.\n");
1687                                 return -1;
1688                         }
1689                         smi_reset = true;
1690                 }
1691
1692                 if (pmu_have_event("msr", "aperf") &&
1693                     pmu_have_event("msr", "smi")) {
1694                         if (!force_metric_only)
1695                                 stat_config.metric_only = true;
1696                         err = parse_events(evsel_list, smi_cost_attrs, &errinfo);
1697                 } else {
1698                         fprintf(stderr, "To measure SMI cost, it needs "
1699                                 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n");
1700                         parse_events_print_error(&errinfo, smi_cost_attrs);
1701                         return -1;
1702                 }
1703                 if (err) {
1704                         parse_events_print_error(&errinfo, smi_cost_attrs);
1705                         fprintf(stderr, "Cannot set up SMI cost events\n");
1706                         return -1;
1707                 }
1708                 return 0;
1709         }
1710
1711         if (topdown_run) {
1712                 char *str = NULL;
1713                 bool warn = false;
1714
1715                 if (!force_metric_only)
1716                         stat_config.metric_only = true;
1717
1718                 if (topdown_filter_events(topdown_metric_attrs, &str, 1) < 0) {
1719                         pr_err("Out of memory\n");
1720                         return -1;
1721                 }
1722                 if (topdown_metric_attrs[0] && str) {
1723                         if (!stat_config.interval && !stat_config.metric_only) {
1724                                 fprintf(stat_config.output,
1725                                         "Topdown accuracy may decrease when measuring long periods.\n"
1726                                         "Please print the result regularly, e.g. -I1000\n");
1727                         }
1728                         goto setup_metrics;
1729                 }
1730
1731                 zfree(&str);
1732
1733                 if (stat_config.aggr_mode != AGGR_GLOBAL &&
1734                     stat_config.aggr_mode != AGGR_CORE) {
1735                         pr_err("top down event configuration requires --per-core mode\n");
1736                         return -1;
1737                 }
1738                 stat_config.aggr_mode = AGGR_CORE;
1739                 if (nr_cgroups || !target__has_cpu(&target)) {
1740                         pr_err("top down event configuration requires system-wide mode (-a)\n");
1741                         return -1;
1742                 }
1743
1744                 if (topdown_filter_events(topdown_attrs, &str,
1745                                 arch_topdown_check_group(&warn)) < 0) {
1746                         pr_err("Out of memory\n");
1747                         return -1;
1748                 }
1749                 if (topdown_attrs[0] && str) {
1750                         if (warn)
1751                                 arch_topdown_group_warn();
1752 setup_metrics:
1753                         err = parse_events(evsel_list, str, &errinfo);
1754                         if (err) {
1755                                 fprintf(stderr,
1756                                         "Cannot set up top down events %s: %d\n",
1757                                         str, err);
1758                                 parse_events_print_error(&errinfo, str);
1759                                 free(str);
1760                                 return -1;
1761                         }
1762                 } else {
1763                         fprintf(stderr, "System does not support topdown\n");
1764                         return -1;
1765                 }
1766                 free(str);
1767         }
1768
1769         if (!evsel_list->core.nr_entries) {
1770                 if (target__has_cpu(&target))
1771                         default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
1772
1773                 if (evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
1774                         return -1;
1775                 if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
1776                         if (evlist__add_default_attrs(evsel_list, frontend_attrs) < 0)
1777                                 return -1;
1778                 }
1779                 if (pmu_have_event("cpu", "stalled-cycles-backend")) {
1780                         if (evlist__add_default_attrs(evsel_list, backend_attrs) < 0)
1781                                 return -1;
1782                 }
1783                 if (evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
1784                         return -1;
1785         }
1786
1787         /* Detailed events get appended to the event list: */
1788
1789         if (detailed_run <  1)
1790                 return 0;
1791
1792         /* Append detailed run extra attributes: */
1793         if (evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1794                 return -1;
1795
1796         if (detailed_run < 2)
1797                 return 0;
1798
1799         /* Append very detailed run extra attributes: */
1800         if (evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1801                 return -1;
1802
1803         if (detailed_run < 3)
1804                 return 0;
1805
1806         /* Append very, very detailed run extra attributes: */
1807         return evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1808 }
1809
1810 static const char * const stat_record_usage[] = {
1811         "perf stat record [<options>]",
1812         NULL,
1813 };
1814
1815 static void init_features(struct perf_session *session)
1816 {
1817         int feat;
1818
1819         for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
1820                 perf_header__set_feat(&session->header, feat);
1821
1822         perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT);
1823         perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
1824         perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
1825         perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
1826         perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
1827 }
1828
1829 static int __cmd_record(int argc, const char **argv)
1830 {
1831         struct perf_session *session;
1832         struct perf_data *data = &perf_stat.data;
1833
1834         argc = parse_options(argc, argv, stat_options, stat_record_usage,
1835                              PARSE_OPT_STOP_AT_NON_OPTION);
1836
1837         if (output_name)
1838                 data->path = output_name;
1839
1840         if (stat_config.run_count != 1 || forever) {
1841                 pr_err("Cannot use -r option with perf stat record.\n");
1842                 return -1;
1843         }
1844
1845         session = perf_session__new(data, false, NULL);
1846         if (IS_ERR(session)) {
1847                 pr_err("Perf session creation failed\n");
1848                 return PTR_ERR(session);
1849         }
1850
1851         init_features(session);
1852
1853         session->evlist   = evsel_list;
1854         perf_stat.session = session;
1855         perf_stat.record  = true;
1856         return argc;
1857 }
1858
1859 static int process_stat_round_event(struct perf_session *session,
1860                                     union perf_event *event)
1861 {
1862         struct perf_record_stat_round *stat_round = &event->stat_round;
1863         struct evsel *counter;
1864         struct timespec tsh, *ts = NULL;
1865         const char **argv = session->header.env.cmdline_argv;
1866         int argc = session->header.env.nr_cmdline;
1867
1868         evlist__for_each_entry(evsel_list, counter)
1869                 perf_stat_process_counter(&stat_config, counter);
1870
1871         if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
1872                 update_stats(&walltime_nsecs_stats, stat_round->time);
1873
1874         if (stat_config.interval && stat_round->time) {
1875                 tsh.tv_sec  = stat_round->time / NSEC_PER_SEC;
1876                 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
1877                 ts = &tsh;
1878         }
1879
1880         print_counters(ts, argc, argv);
1881         return 0;
1882 }
1883
1884 static
1885 int process_stat_config_event(struct perf_session *session,
1886                               union perf_event *event)
1887 {
1888         struct perf_tool *tool = session->tool;
1889         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1890
1891         perf_event__read_stat_config(&stat_config, &event->stat_config);
1892
1893         if (perf_cpu_map__empty(st->cpus)) {
1894                 if (st->aggr_mode != AGGR_UNSET)
1895                         pr_warning("warning: processing task data, aggregation mode not set\n");
1896                 return 0;
1897         }
1898
1899         if (st->aggr_mode != AGGR_UNSET)
1900                 stat_config.aggr_mode = st->aggr_mode;
1901
1902         if (perf_stat.data.is_pipe)
1903                 perf_stat_init_aggr_mode();
1904         else
1905                 perf_stat_init_aggr_mode_file(st);
1906
1907         return 0;
1908 }
1909
1910 static int set_maps(struct perf_stat *st)
1911 {
1912         if (!st->cpus || !st->threads)
1913                 return 0;
1914
1915         if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
1916                 return -EINVAL;
1917
1918         perf_evlist__set_maps(&evsel_list->core, st->cpus, st->threads);
1919
1920         if (evlist__alloc_stats(evsel_list, true))
1921                 return -ENOMEM;
1922
1923         st->maps_allocated = true;
1924         return 0;
1925 }
1926
1927 static
1928 int process_thread_map_event(struct perf_session *session,
1929                              union perf_event *event)
1930 {
1931         struct perf_tool *tool = session->tool;
1932         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1933
1934         if (st->threads) {
1935                 pr_warning("Extra thread map event, ignoring.\n");
1936                 return 0;
1937         }
1938
1939         st->threads = thread_map__new_event(&event->thread_map);
1940         if (!st->threads)
1941                 return -ENOMEM;
1942
1943         return set_maps(st);
1944 }
1945
1946 static
1947 int process_cpu_map_event(struct perf_session *session,
1948                           union perf_event *event)
1949 {
1950         struct perf_tool *tool = session->tool;
1951         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1952         struct perf_cpu_map *cpus;
1953
1954         if (st->cpus) {
1955                 pr_warning("Extra cpu map event, ignoring.\n");
1956                 return 0;
1957         }
1958
1959         cpus = cpu_map__new_data(&event->cpu_map.data);
1960         if (!cpus)
1961                 return -ENOMEM;
1962
1963         st->cpus = cpus;
1964         return set_maps(st);
1965 }
1966
1967 static const char * const stat_report_usage[] = {
1968         "perf stat report [<options>]",
1969         NULL,
1970 };
1971
1972 static struct perf_stat perf_stat = {
1973         .tool = {
1974                 .attr           = perf_event__process_attr,
1975                 .event_update   = perf_event__process_event_update,
1976                 .thread_map     = process_thread_map_event,
1977                 .cpu_map        = process_cpu_map_event,
1978                 .stat_config    = process_stat_config_event,
1979                 .stat           = perf_event__process_stat_event,
1980                 .stat_round     = process_stat_round_event,
1981         },
1982         .aggr_mode = AGGR_UNSET,
1983 };
1984
1985 static int __cmd_report(int argc, const char **argv)
1986 {
1987         struct perf_session *session;
1988         const struct option options[] = {
1989         OPT_STRING('i', "input", &input_name, "file", "input file name"),
1990         OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
1991                      "aggregate counts per processor socket", AGGR_SOCKET),
1992         OPT_SET_UINT(0, "per-die", &perf_stat.aggr_mode,
1993                      "aggregate counts per processor die", AGGR_DIE),
1994         OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
1995                      "aggregate counts per physical processor core", AGGR_CORE),
1996         OPT_SET_UINT(0, "per-node", &perf_stat.aggr_mode,
1997                      "aggregate counts per numa node", AGGR_NODE),
1998         OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
1999                      "disable CPU count aggregation", AGGR_NONE),
2000         OPT_END()
2001         };
2002         struct stat st;
2003         int ret;
2004
2005         argc = parse_options(argc, argv, options, stat_report_usage, 0);
2006
2007         if (!input_name || !strlen(input_name)) {
2008                 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
2009                         input_name = "-";
2010                 else
2011                         input_name = "perf.data";
2012         }
2013
2014         perf_stat.data.path = input_name;
2015         perf_stat.data.mode = PERF_DATA_MODE_READ;
2016
2017         session = perf_session__new(&perf_stat.data, false, &perf_stat.tool);
2018         if (IS_ERR(session))
2019                 return PTR_ERR(session);
2020
2021         perf_stat.session  = session;
2022         stat_config.output = stderr;
2023         evsel_list         = session->evlist;
2024
2025         ret = perf_session__process_events(session);
2026         if (ret)
2027                 return ret;
2028
2029         perf_session__delete(session);
2030         return 0;
2031 }
2032
2033 static void setup_system_wide(int forks)
2034 {
2035         /*
2036          * Make system wide (-a) the default target if
2037          * no target was specified and one of following
2038          * conditions is met:
2039          *
2040          *   - there's no workload specified
2041          *   - there is workload specified but all requested
2042          *     events are system wide events
2043          */
2044         if (!target__none(&target))
2045                 return;
2046
2047         if (!forks)
2048                 target.system_wide = true;
2049         else {
2050                 struct evsel *counter;
2051
2052                 evlist__for_each_entry(evsel_list, counter) {
2053                         if (!counter->core.system_wide &&
2054                             strcmp(counter->name, "duration_time")) {
2055                                 return;
2056                         }
2057                 }
2058
2059                 if (evsel_list->core.nr_entries)
2060                         target.system_wide = true;
2061         }
2062 }
2063
2064 int cmd_stat(int argc, const char **argv)
2065 {
2066         const char * const stat_usage[] = {
2067                 "perf stat [<options>] [<command>]",
2068                 NULL
2069         };
2070         int status = -EINVAL, run_idx;
2071         const char *mode;
2072         FILE *output = stderr;
2073         unsigned int interval, timeout;
2074         const char * const stat_subcommands[] = { "record", "report" };
2075
2076         setlocale(LC_ALL, "");
2077
2078         evsel_list = evlist__new();
2079         if (evsel_list == NULL)
2080                 return -ENOMEM;
2081
2082         parse_events__shrink_config_terms();
2083
2084         /* String-parsing callback-based options would segfault when negated */
2085         set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG);
2086         set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG);
2087         set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG);
2088
2089         argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
2090                                         (const char **) stat_usage,
2091                                         PARSE_OPT_STOP_AT_NON_OPTION);
2092         perf_stat__collect_metric_expr(evsel_list);
2093         perf_stat__init_shadow_stats();
2094
2095         if (stat_config.csv_sep) {
2096                 stat_config.csv_output = true;
2097                 if (!strcmp(stat_config.csv_sep, "\\t"))
2098                         stat_config.csv_sep = "\t";
2099         } else
2100                 stat_config.csv_sep = DEFAULT_SEPARATOR;
2101
2102         if (argc && !strncmp(argv[0], "rec", 3)) {
2103                 argc = __cmd_record(argc, argv);
2104                 if (argc < 0)
2105                         return -1;
2106         } else if (argc && !strncmp(argv[0], "rep", 3))
2107                 return __cmd_report(argc, argv);
2108
2109         interval = stat_config.interval;
2110         timeout = stat_config.timeout;
2111
2112         /*
2113          * For record command the -o is already taken care of.
2114          */
2115         if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
2116                 output = NULL;
2117
2118         if (output_name && output_fd) {
2119                 fprintf(stderr, "cannot use both --output and --log-fd\n");
2120                 parse_options_usage(stat_usage, stat_options, "o", 1);
2121                 parse_options_usage(NULL, stat_options, "log-fd", 0);
2122                 goto out;
2123         }
2124
2125         if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) {
2126                 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
2127                 goto out;
2128         }
2129
2130         if (stat_config.metric_only && stat_config.run_count > 1) {
2131                 fprintf(stderr, "--metric-only is not supported with -r\n");
2132                 goto out;
2133         }
2134
2135         if (stat_config.walltime_run_table && stat_config.run_count <= 1) {
2136                 fprintf(stderr, "--table is only supported with -r\n");
2137                 parse_options_usage(stat_usage, stat_options, "r", 1);
2138                 parse_options_usage(NULL, stat_options, "table", 0);
2139                 goto out;
2140         }
2141
2142         if (output_fd < 0) {
2143                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
2144                 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
2145                 goto out;
2146         }
2147
2148         if (!output && !stat_config.quiet) {
2149                 struct timespec tm;
2150                 mode = append_file ? "a" : "w";
2151
2152                 output = fopen(output_name, mode);
2153                 if (!output) {
2154                         perror("failed to create output file");
2155                         return -1;
2156                 }
2157                 clock_gettime(CLOCK_REALTIME, &tm);
2158                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
2159         } else if (output_fd > 0) {
2160                 mode = append_file ? "a" : "w";
2161                 output = fdopen(output_fd, mode);
2162                 if (!output) {
2163                         perror("Failed opening logfd");
2164                         return -errno;
2165                 }
2166         }
2167
2168         stat_config.output = output;
2169
2170         /*
2171          * let the spreadsheet do the pretty-printing
2172          */
2173         if (stat_config.csv_output) {
2174                 /* User explicitly passed -B? */
2175                 if (big_num_opt == 1) {
2176                         fprintf(stderr, "-B option not supported with -x\n");
2177                         parse_options_usage(stat_usage, stat_options, "B", 1);
2178                         parse_options_usage(NULL, stat_options, "x", 1);
2179                         goto out;
2180                 } else /* Nope, so disable big number formatting */
2181                         stat_config.big_num = false;
2182         } else if (big_num_opt == 0) /* User passed --no-big-num */
2183                 stat_config.big_num = false;
2184
2185         setup_system_wide(argc);
2186
2187         /*
2188          * Display user/system times only for single
2189          * run and when there's specified tracee.
2190          */
2191         if ((stat_config.run_count == 1) && target__none(&target))
2192                 stat_config.ru_display = true;
2193
2194         if (stat_config.run_count < 0) {
2195                 pr_err("Run count must be a positive number\n");
2196                 parse_options_usage(stat_usage, stat_options, "r", 1);
2197                 goto out;
2198         } else if (stat_config.run_count == 0) {
2199                 forever = true;
2200                 stat_config.run_count = 1;
2201         }
2202
2203         if (stat_config.walltime_run_table) {
2204                 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0]));
2205                 if (!stat_config.walltime_run) {
2206                         pr_err("failed to setup -r option");
2207                         goto out;
2208                 }
2209         }
2210
2211         if ((stat_config.aggr_mode == AGGR_THREAD) &&
2212                 !target__has_task(&target)) {
2213                 if (!target.system_wide || target.cpu_list) {
2214                         fprintf(stderr, "The --per-thread option is only "
2215                                 "available when monitoring via -p -t -a "
2216                                 "options or only --per-thread.\n");
2217                         parse_options_usage(NULL, stat_options, "p", 1);
2218                         parse_options_usage(NULL, stat_options, "t", 1);
2219                         goto out;
2220                 }
2221         }
2222
2223         /*
2224          * no_aggr, cgroup are for system-wide only
2225          * --per-thread is aggregated per thread, we dont mix it with cpu mode
2226          */
2227         if (((stat_config.aggr_mode != AGGR_GLOBAL &&
2228               stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
2229             !target__has_cpu(&target)) {
2230                 fprintf(stderr, "both cgroup and no-aggregation "
2231                         "modes only available in system-wide mode\n");
2232
2233                 parse_options_usage(stat_usage, stat_options, "G", 1);
2234                 parse_options_usage(NULL, stat_options, "A", 1);
2235                 parse_options_usage(NULL, stat_options, "a", 1);
2236                 goto out;
2237         }
2238
2239         if (add_default_attributes())
2240                 goto out;
2241
2242         if (stat_config.cgroup_list) {
2243                 if (nr_cgroups > 0) {
2244                         pr_err("--cgroup and --for-each-cgroup cannot be used together\n");
2245                         parse_options_usage(stat_usage, stat_options, "G", 1);
2246                         parse_options_usage(NULL, stat_options, "for-each-cgroup", 0);
2247                         goto out;
2248                 }
2249
2250                 if (evlist__expand_cgroup(evsel_list, stat_config.cgroup_list,
2251                                           &stat_config.metric_events, true) < 0) {
2252                         parse_options_usage(stat_usage, stat_options,
2253                                             "for-each-cgroup", 0);
2254                         goto out;
2255                 }
2256         }
2257
2258         target__validate(&target);
2259
2260         if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
2261                 target.per_thread = true;
2262
2263         if (evlist__create_maps(evsel_list, &target) < 0) {
2264                 if (target__has_task(&target)) {
2265                         pr_err("Problems finding threads of monitor\n");
2266                         parse_options_usage(stat_usage, stat_options, "p", 1);
2267                         parse_options_usage(NULL, stat_options, "t", 1);
2268                 } else if (target__has_cpu(&target)) {
2269                         perror("failed to parse CPUs map");
2270                         parse_options_usage(stat_usage, stat_options, "C", 1);
2271                         parse_options_usage(NULL, stat_options, "a", 1);
2272                 }
2273                 goto out;
2274         }
2275
2276         evlist__check_cpu_maps(evsel_list);
2277
2278         /*
2279          * Initialize thread_map with comm names,
2280          * so we could print it out on output.
2281          */
2282         if (stat_config.aggr_mode == AGGR_THREAD) {
2283                 thread_map__read_comms(evsel_list->core.threads);
2284                 if (target.system_wide) {
2285                         if (runtime_stat_new(&stat_config,
2286                                 perf_thread_map__nr(evsel_list->core.threads))) {
2287                                 goto out;
2288                         }
2289                 }
2290         }
2291
2292         if (stat_config.aggr_mode == AGGR_NODE)
2293                 cpu__setup_cpunode_map();
2294
2295         if (stat_config.times && interval)
2296                 interval_count = true;
2297         else if (stat_config.times && !interval) {
2298                 pr_err("interval-count option should be used together with "
2299                                 "interval-print.\n");
2300                 parse_options_usage(stat_usage, stat_options, "interval-count", 0);
2301                 parse_options_usage(stat_usage, stat_options, "I", 1);
2302                 goto out;
2303         }
2304
2305         if (timeout && timeout < 100) {
2306                 if (timeout < 10) {
2307                         pr_err("timeout must be >= 10ms.\n");
2308                         parse_options_usage(stat_usage, stat_options, "timeout", 0);
2309                         goto out;
2310                 } else
2311                         pr_warning("timeout < 100ms. "
2312                                    "The overhead percentage could be high in some cases. "
2313                                    "Please proceed with caution.\n");
2314         }
2315         if (timeout && interval) {
2316                 pr_err("timeout option is not supported with interval-print.\n");
2317                 parse_options_usage(stat_usage, stat_options, "timeout", 0);
2318                 parse_options_usage(stat_usage, stat_options, "I", 1);
2319                 goto out;
2320         }
2321
2322         if (evlist__alloc_stats(evsel_list, interval))
2323                 goto out;
2324
2325         if (perf_stat_init_aggr_mode())
2326                 goto out;
2327
2328         /*
2329          * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
2330          * while avoiding that older tools show confusing messages.
2331          *
2332          * However for pipe sessions we need to keep it zero,
2333          * because script's perf_evsel__check_attr is triggered
2334          * by attr->sample_type != 0, and we can't run it on
2335          * stat sessions.
2336          */
2337         stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe);
2338
2339         /*
2340          * We dont want to block the signals - that would cause
2341          * child tasks to inherit that and Ctrl-C would not work.
2342          * What we want is for Ctrl-C to work in the exec()-ed
2343          * task, but being ignored by perf stat itself:
2344          */
2345         atexit(sig_atexit);
2346         if (!forever)
2347                 signal(SIGINT,  skip_signal);
2348         signal(SIGCHLD, skip_signal);
2349         signal(SIGALRM, skip_signal);
2350         signal(SIGABRT, skip_signal);
2351
2352         if (evlist__initialize_ctlfd(evsel_list, stat_config.ctl_fd, stat_config.ctl_fd_ack))
2353                 goto out;
2354
2355         status = 0;
2356         for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) {
2357                 if (stat_config.run_count != 1 && verbose > 0)
2358                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
2359                                 run_idx + 1);
2360
2361                 if (run_idx != 0)
2362                         evlist__reset_prev_raw_counts(evsel_list);
2363
2364                 status = run_perf_stat(argc, argv, run_idx);
2365                 if (forever && status != -1 && !interval) {
2366                         print_counters(NULL, argc, argv);
2367                         perf_stat__reset_stats();
2368                 }
2369         }
2370
2371         if (!forever && status != -1 && (!interval || stat_config.summary))
2372                 print_counters(NULL, argc, argv);
2373
2374         evlist__finalize_ctlfd(evsel_list);
2375
2376         if (STAT_RECORD) {
2377                 /*
2378                  * We synthesize the kernel mmap record just so that older tools
2379                  * don't emit warnings about not being able to resolve symbols
2380                  * due to /proc/sys/kernel/kptr_restrict settings and instear provide
2381                  * a saner message about no samples being in the perf.data file.
2382                  *
2383                  * This also serves to suppress a warning about f_header.data.size == 0
2384                  * in header.c at the moment 'perf stat record' gets introduced, which
2385                  * is not really needed once we start adding the stat specific PERF_RECORD_
2386                  * records, but the need to suppress the kptr_restrict messages in older
2387                  * tools remain  -acme
2388                  */
2389                 int fd = perf_data__fd(&perf_stat.data);
2390                 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
2391                                                              process_synthesized_event,
2392                                                              &perf_stat.session->machines.host);
2393                 if (err) {
2394                         pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
2395                                    "older tools may produce warnings about this file\n.");
2396                 }
2397
2398                 if (!interval) {
2399                         if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
2400                                 pr_err("failed to write stat round event\n");
2401                 }
2402
2403                 if (!perf_stat.data.is_pipe) {
2404                         perf_stat.session->header.data_size += perf_stat.bytes_written;
2405                         perf_session__write_header(perf_stat.session, evsel_list, fd, true);
2406                 }
2407
2408                 evlist__close(evsel_list);
2409                 perf_session__delete(perf_stat.session);
2410         }
2411
2412         perf_stat__exit_aggr_mode();
2413         evlist__free_stats(evsel_list);
2414 out:
2415         zfree(&stat_config.walltime_run);
2416
2417         if (smi_cost && smi_reset)
2418                 sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
2419
2420         evlist__delete(evsel_list);
2421
2422         metricgroup__rblist_exit(&stat_config.metric_events);
2423         runtime_stat_delete(&stat_config);
2424         evlist__close_control(stat_config.ctl_fd, stat_config.ctl_fd_ack, &stat_config.ctl_fd_close);
2425
2426         return status;
2427 }