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