tools/perf/builtin-stat.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * builtin-stat.c
   4  *
   5  * Builtin stat command: Give a precise performance counters summary
   6  * overview about any workload, CPU or specific PID.
   7  *
   8  * Sample output:
   9
  10    $ perf stat ./hackbench 10
  11
  12   Time: 0.118
  13
  14   Performance counter stats for './hackbench 10':
  15
  16        1708.761321 task-clock                #   11.037 CPUs utilized
  17             41,190 context-switches          #    0.024 M/sec
  18              6,735 CPU-migrations            #    0.004 M/sec
  19             17,318 page-faults               #    0.010 M/sec
  20      5,205,202,243 cycles                    #    3.046 GHz
  21      3,856,436,920 stalled-cycles-frontend   #   74.09% frontend cycles idle
  22      1,600,790,871 stalled-cycles-backend    #   30.75% backend  cycles idle
  23      2,603,501,247 instructions              #    0.50  insns per cycle
  24                                              #    1.48  stalled cycles per insn
  25        484,357,498 branches                  #  283.455 M/sec
  26          6,388,934 branch-misses             #    1.32% of all branches
  27
  28         0.154822978  seconds time elapsed
  29
  30  *
  31  * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
  32  *
  33  * Improvements and fixes by:
  34  *
  35  *   Arjan van de Ven <arjan@linux.intel.com>
  36  *   Yanmin Zhang <yanmin.zhang@intel.com>
  37  *   Wu Fengguang <fengguang.wu@intel.com>
  38  *   Mike Galbraith <efault@gmx.de>
  39  *   Paul Mackerras <paulus@samba.org>
  40  *   Jaswinder Singh Rajput <jaswinder@kernel.org>
  41  */
  42
  43 #include "builtin.h"
  44 #include "util/cgroup.h"
  45 #include <subcmd/parse-options.h>
  46 #include "util/parse-events.h"
  47 #include "util/pmus.h"
  48 #include "util/pmu.h"
  49 #include "util/event.h"
  50 #include "util/evlist.h"
  51 #include "util/evsel.h"
  52 #include "util/debug.h"
  53 #include "util/color.h"
  54 #include "util/stat.h"
  55 #include "util/header.h"
  56 #include "util/cpumap.h"
  57 #include "util/thread_map.h"
  58 #include "util/counts.h"
  59 #include "util/topdown.h"
  60 #include "util/session.h"
  61 #include "util/tool.h"
  62 #include "util/string2.h"
  63 #include "util/metricgroup.h"
  64 #include "util/synthetic-events.h"
  65 #include "util/target.h"
  66 #include "util/time-utils.h"
  67 #include "util/top.h"
  68 #include "util/affinity.h"
  69 #include "util/pfm.h"
  70 #include "util/bpf_counter.h"
  71 #include "util/iostat.h"
  72 #include "util/util.h"
  73 #include "asm/bug.h"
  74
  75 #include <linux/time64.h>
  76 #include <linux/zalloc.h>
  77 #include <api/fs/fs.h>
  78 #include <errno.h>
  79 #include <signal.h>
  80 #include <stdlib.h>
  81 #include <sys/prctl.h>
  82 #include <inttypes.h>
  83 #include <locale.h>
  84 #include <math.h>
  85 #include <sys/types.h>
  86 #include <sys/stat.h>
  87 #include <sys/wait.h>
  88 #include <unistd.h>
  89 #include <sys/time.h>
  90 #include <sys/resource.h>
  91 #include <linux/err.h>
  92
  93 #include <linux/ctype.h>
  94 #include <perf/evlist.h>
  95 #include <internal/threadmap.h>
  96
  97 #define DEFAULT_SEPARATOR       " "
  98 #define FREEZE_ON_SMI_PATH      "devices/cpu/freeze_on_smi"
  99
 100 static void print_counters(struct timespec *ts, int argc, const char **argv);
 101
 102 static struct evlist    *evsel_list;
 103 static struct parse_events_option_args parse_events_option_args = {
 104         .evlistp = &evsel_list,
 105 };
 106
 107 static bool all_counters_use_bpf = true;
 108
 109 static struct target target = {
 110         .uid    = UINT_MAX,
 111 };
 112
 113 #define METRIC_ONLY_LEN 20
 114
 115 static volatile sig_atomic_t    child_pid                       = -1;
 116 static int                      detailed_run                    =  0;
 117 static bool                     transaction_run;
 118 static bool                     topdown_run                     = false;
 119 static bool                     smi_cost                        = false;
 120 static bool                     smi_reset                       = false;
 121 static int                      big_num_opt                     =  -1;
 122 static const char               *pre_cmd                        = NULL;
 123 static const char               *post_cmd                       = NULL;
 124 static bool                     sync_run                        = false;
 125 static bool                     forever                         = false;
 126 static bool                     force_metric_only               = false;
 127 static struct timespec          ref_time;
 128 static bool                     append_file;
 129 static bool                     interval_count;
 130 static const char               *output_name;
 131 static int                      output_fd;
 132 static char                     *metrics;
 133
 134 struct perf_stat {
 135         bool                     record;
 136         struct perf_data         data;
 137         struct perf_session     *session;
 138         u64                      bytes_written;
 139         struct perf_tool         tool;
 140         bool                     maps_allocated;
 141         struct perf_cpu_map     *cpus;
 142         struct perf_thread_map *threads;
 143         enum aggr_mode           aggr_mode;
 144         u32                      aggr_level;
 145 };
 146
 147 static struct perf_stat         perf_stat;
 148 #define STAT_RECORD             perf_stat.record
 149
 150 static volatile sig_atomic_t done = 0;
 151
 152 static struct perf_stat_config stat_config = {
 153         .aggr_mode              = AGGR_GLOBAL,
 154         .aggr_level             = MAX_CACHE_LVL + 1,
 155         .scale                  = true,
 156         .unit_width             = 4, /* strlen("unit") */
 157         .run_count              = 1,
 158         .metric_only_len        = METRIC_ONLY_LEN,
 159         .walltime_nsecs_stats   = &walltime_nsecs_stats,
 160         .ru_stats               = &ru_stats,
 161         .big_num                = true,
 162         .ctl_fd                 = -1,
 163         .ctl_fd_ack             = -1,
 164         .iostat_run             = false,
 165 };
 166
 167 static bool cpus_map_matched(struct evsel *a, struct evsel *b)
 168 {
 169         if (!a->core.cpus && !b->core.cpus)
 170                 return true;
 171
 172         if (!a->core.cpus || !b->core.cpus)
 173                 return false;
 174
 175         if (perf_cpu_map__nr(a->core.cpus) != perf_cpu_map__nr(b->core.cpus))
 176                 return false;
 177
 178         for (int i = 0; i < perf_cpu_map__nr(a->core.cpus); i++) {
 179                 if (perf_cpu_map__cpu(a->core.cpus, i).cpu !=
 180                     perf_cpu_map__cpu(b->core.cpus, i).cpu)
 181                         return false;
 182         }
 183
 184         return true;
 185 }
 186
 187 static void evlist__check_cpu_maps(struct evlist *evlist)
 188 {
 189         struct evsel *evsel, *warned_leader = NULL;
 190
 191         evlist__for_each_entry(evlist, evsel) {
 192                 struct evsel *leader = evsel__leader(evsel);
 193
 194                 /* Check that leader matches cpus with each member. */
 195                 if (leader == evsel)
 196                         continue;
 197                 if (cpus_map_matched(leader, evsel))
 198                         continue;
 199
 200                 /* If there's mismatch disable the group and warn user. */
 201                 if (warned_leader != leader) {
 202                         char buf[200];
 203
 204                         pr_warning("WARNING: grouped events cpus do not match.\n"
 205                                 "Events with CPUs not matching the leader will "
 206                                 "be removed from the group.\n");
 207                         evsel__group_desc(leader, buf, sizeof(buf));
 208                         pr_warning("  %s\n", buf);
 209                         warned_leader = leader;
 210                 }
 211                 if (verbose > 0) {
 212                         char buf[200];
 213
 214                         cpu_map__snprint(leader->core.cpus, buf, sizeof(buf));
 215                         pr_warning("     %s: %s\n", leader->name, buf);
 216                         cpu_map__snprint(evsel->core.cpus, buf, sizeof(buf));
 217                         pr_warning("     %s: %s\n", evsel->name, buf);
 218                 }
 219
 220                 evsel__remove_from_group(evsel, leader);
 221         }
 222 }
 223
 224 static inline void diff_timespec(struct timespec *r, struct timespec *a,
 225                                  struct timespec *b)
 226 {
 227         r->tv_sec = a->tv_sec - b->tv_sec;
 228         if (a->tv_nsec < b->tv_nsec) {
 229                 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
 230                 r->tv_sec--;
 231         } else {
 232                 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
 233         }
 234 }
 235
 236 static void perf_stat__reset_stats(void)
 237 {
 238         evlist__reset_stats(evsel_list);
 239         perf_stat__reset_shadow_stats();
 240 }
 241
 242 static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
 243                                      union perf_event *event,
 244                                      struct perf_sample *sample __maybe_unused,
 245                                      struct machine *machine __maybe_unused)
 246 {
 247         if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) {
 248                 pr_err("failed to write perf data, error: %m\n");
 249                 return -1;
 250         }
 251
 252         perf_stat.bytes_written += event->header.size;
 253         return 0;
 254 }
 255
 256 static int write_stat_round_event(u64 tm, u64 type)
 257 {
 258         return perf_event__synthesize_stat_round(NULL, tm, type,
 259                                                  process_synthesized_event,
 260                                                  NULL);
 261 }
 262
 263 #define WRITE_STAT_ROUND_EVENT(time, interval) \
 264         write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
 265
 266 #define SID(e, x, y) xyarray__entry(e->core.sample_id, x, y)
 267
 268 static int evsel__write_stat_event(struct evsel *counter, int cpu_map_idx, u32 thread,
 269                                    struct perf_counts_values *count)
 270 {
 271         struct perf_sample_id *sid = SID(counter, cpu_map_idx, thread);
 272         struct perf_cpu cpu = perf_cpu_map__cpu(evsel__cpus(counter), cpu_map_idx);
 273
 274         return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
 275                                            process_synthesized_event, NULL);
 276 }
 277
 278 static int read_single_counter(struct evsel *counter, int cpu_map_idx,
 279                                int thread, struct timespec *rs)
 280 {
 281         switch(counter->tool_event) {
 282                 case PERF_TOOL_DURATION_TIME: {
 283                         u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL;
 284                         struct perf_counts_values *count =
 285                                 perf_counts(counter->counts, cpu_map_idx, thread);
 286                         count->ena = count->run = val;
 287                         count->val = val;
 288                         return 0;
 289                 }
 290                 case PERF_TOOL_USER_TIME:
 291                 case PERF_TOOL_SYSTEM_TIME: {
 292                         u64 val;
 293                         struct perf_counts_values *count =
 294                                 perf_counts(counter->counts, cpu_map_idx, thread);
 295                         if (counter->tool_event == PERF_TOOL_USER_TIME)
 296                                 val = ru_stats.ru_utime_usec_stat.mean;
 297                         else
 298                                 val = ru_stats.ru_stime_usec_stat.mean;
 299                         count->ena = count->run = val;
 300                         count->val = val;
 301                         return 0;
 302                 }
 303                 default:
 304                 case PERF_TOOL_NONE:
 305                         return evsel__read_counter(counter, cpu_map_idx, thread);
 306                 case PERF_TOOL_MAX:
 307                         /* This should never be reached */
 308                         return 0;
 309         }
 310 }
 311
 312 /*
 313  * Read out the results of a single counter:
 314  * do not aggregate counts across CPUs in system-wide mode
 315  */
 316 static int read_counter_cpu(struct evsel *counter, struct timespec *rs, int cpu_map_idx)
 317 {
 318         int nthreads = perf_thread_map__nr(evsel_list->core.threads);
 319         int thread;
 320
 321         if (!counter->supported)
 322                 return -ENOENT;
 323
 324         for (thread = 0; thread < nthreads; thread++) {
 325                 struct perf_counts_values *count;
 326
 327                 count = perf_counts(counter->counts, cpu_map_idx, thread);
 328
 329                 /*
 330                  * The leader's group read loads data into its group members
 331                  * (via evsel__read_counter()) and sets their count->loaded.
 332                  */
 333                 if (!perf_counts__is_loaded(counter->counts, cpu_map_idx, thread) &&
 334                     read_single_counter(counter, cpu_map_idx, thread, rs)) {
 335                         counter->counts->scaled = -1;
 336                         perf_counts(counter->counts, cpu_map_idx, thread)->ena = 0;
 337                         perf_counts(counter->counts, cpu_map_idx, thread)->run = 0;
 338                         return -1;
 339                 }
 340
 341                 perf_counts__set_loaded(counter->counts, cpu_map_idx, thread, false);
 342
 343                 if (STAT_RECORD) {
 344                         if (evsel__write_stat_event(counter, cpu_map_idx, thread, count)) {
 345                                 pr_err("failed to write stat event\n");
 346                                 return -1;
 347                         }
 348                 }
 349
 350                 if (verbose > 1) {
 351                         fprintf(stat_config.output,
 352                                 "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 353                                         evsel__name(counter),
 354                                         perf_cpu_map__cpu(evsel__cpus(counter),
 355                                                           cpu_map_idx).cpu,
 356                                         count->val, count->ena, count->run);
 357                 }
 358         }
 359
 360         return 0;
 361 }
 362
 363 static int read_affinity_counters(struct timespec *rs)
 364 {
 365         struct evlist_cpu_iterator evlist_cpu_itr;
 366         struct affinity saved_affinity, *affinity;
 367
 368         if (all_counters_use_bpf)
 369                 return 0;
 370
 371         if (!target__has_cpu(&target) || target__has_per_thread(&target))
 372                 affinity = NULL;
 373         else if (affinity__setup(&saved_affinity) < 0)
 374                 return -1;
 375         else
 376                 affinity = &saved_affinity;
 377
 378         evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) {
 379                 struct evsel *counter = evlist_cpu_itr.evsel;
 380
 381                 if (evsel__is_bpf(counter))
 382                         continue;
 383
 384                 if (!counter->err) {
 385                         counter->err = read_counter_cpu(counter, rs,
 386                                                         evlist_cpu_itr.cpu_map_idx);
 387                 }
 388         }
 389         if (affinity)
 390                 affinity__cleanup(&saved_affinity);
 391
 392         return 0;
 393 }
 394
 395 static int read_bpf_map_counters(void)
 396 {
 397         struct evsel *counter;
 398         int err;
 399
 400         evlist__for_each_entry(evsel_list, counter) {
 401                 if (!evsel__is_bpf(counter))
 402                         continue;
 403
 404                 err = bpf_counter__read(counter);
 405                 if (err)
 406                         return err;
 407         }
 408         return 0;
 409 }
 410
 411 static int read_counters(struct timespec *rs)
 412 {
 413         if (!stat_config.stop_read_counter) {
 414                 if (read_bpf_map_counters() ||
 415                     read_affinity_counters(rs))
 416                         return -1;
 417         }
 418         return 0;
 419 }
 420
 421 static void process_counters(void)
 422 {
 423         struct evsel *counter;
 424
 425         evlist__for_each_entry(evsel_list, counter) {
 426                 if (counter->err)
 427                         pr_debug("failed to read counter %s\n", counter->name);
 428                 if (counter->err == 0 && perf_stat_process_counter(&stat_config, counter))
 429                         pr_warning("failed to process counter %s\n", counter->name);
 430                 counter->err = 0;
 431         }
 432
 433         perf_stat_merge_counters(&stat_config, evsel_list);
 434         perf_stat_process_percore(&stat_config, evsel_list);
 435 }
 436
 437 static void process_interval(void)
 438 {
 439         struct timespec ts, rs;
 440
 441         clock_gettime(CLOCK_MONOTONIC, &ts);
 442         diff_timespec(&rs, &ts, &ref_time);
 443
 444         evlist__reset_aggr_stats(evsel_list);
 445
 446         if (read_counters(&rs) == 0)
 447                 process_counters();
 448
 449         if (STAT_RECORD) {
 450                 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
 451                         pr_err("failed to write stat round event\n");
 452         }
 453
 454         init_stats(&walltime_nsecs_stats);
 455         update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000ULL);
 456         print_counters(&rs, 0, NULL);
 457 }
 458
 459 static bool handle_interval(unsigned int interval, int *times)
 460 {
 461         if (interval) {
 462                 process_interval();
 463                 if (interval_count && !(--(*times)))
 464                         return true;
 465         }
 466         return false;
 467 }
 468
 469 static int enable_counters(void)
 470 {
 471         struct evsel *evsel;
 472         int err;
 473
 474         evlist__for_each_entry(evsel_list, evsel) {
 475                 if (!evsel__is_bpf(evsel))
 476                         continue;
 477
 478                 err = bpf_counter__enable(evsel);
 479                 if (err)
 480                         return err;
 481         }
 482
 483         if (!target__enable_on_exec(&target)) {
 484                 if (!all_counters_use_bpf)
 485                         evlist__enable(evsel_list);
 486         }
 487         return 0;
 488 }
 489
 490 static void disable_counters(void)
 491 {
 492         struct evsel *counter;
 493
 494         /*
 495          * If we don't have tracee (attaching to task or cpu), counters may
 496          * still be running. To get accurate group ratios, we must stop groups
 497          * from counting before reading their constituent counters.
 498          */
 499         if (!target__none(&target)) {
 500                 evlist__for_each_entry(evsel_list, counter)
 501                         bpf_counter__disable(counter);
 502                 if (!all_counters_use_bpf)
 503                         evlist__disable(evsel_list);
 504         }
 505 }
 506
 507 static volatile sig_atomic_t workload_exec_errno;
 508
 509 /*
 510  * evlist__prepare_workload will send a SIGUSR1
 511  * if the fork fails, since we asked by setting its
 512  * want_signal to true.
 513  */
 514 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
 515                                         void *ucontext __maybe_unused)
 516 {
 517         workload_exec_errno = info->si_value.sival_int;
 518 }
 519
 520 static bool evsel__should_store_id(struct evsel *counter)
 521 {
 522         return STAT_RECORD || counter->core.attr.read_format & PERF_FORMAT_ID;
 523 }
 524
 525 static bool is_target_alive(struct target *_target,
 526                             struct perf_thread_map *threads)
 527 {
 528         struct stat st;
 529         int i;
 530
 531         if (!target__has_task(_target))
 532                 return true;
 533
 534         for (i = 0; i < threads->nr; i++) {
 535                 char path[PATH_MAX];
 536
 537                 scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(),
 538                           threads->map[i].pid);
 539
 540                 if (!stat(path, &st))
 541                         return true;
 542         }
 543
 544         return false;
 545 }
 546
 547 static void process_evlist(struct evlist *evlist, unsigned int interval)
 548 {
 549         enum evlist_ctl_cmd cmd = EVLIST_CTL_CMD_UNSUPPORTED;
 550
 551         if (evlist__ctlfd_process(evlist, &cmd) > 0) {
 552                 switch (cmd) {
 553                 case EVLIST_CTL_CMD_ENABLE:
 554                         fallthrough;
 555                 case EVLIST_CTL_CMD_DISABLE:
 556                         if (interval)
 557                                 process_interval();
 558                         break;
 559                 case EVLIST_CTL_CMD_SNAPSHOT:
 560                 case EVLIST_CTL_CMD_ACK:
 561                 case EVLIST_CTL_CMD_UNSUPPORTED:
 562                 case EVLIST_CTL_CMD_EVLIST:
 563                 case EVLIST_CTL_CMD_STOP:
 564                 case EVLIST_CTL_CMD_PING:
 565                 default:
 566                         break;
 567                 }
 568         }
 569 }
 570
 571 static void compute_tts(struct timespec *time_start, struct timespec *time_stop,
 572                         int *time_to_sleep)
 573 {
 574         int tts = *time_to_sleep;
 575         struct timespec time_diff;
 576
 577         diff_timespec(&time_diff, time_stop, time_start);
 578
 579         tts -= time_diff.tv_sec * MSEC_PER_SEC +
 580                time_diff.tv_nsec / NSEC_PER_MSEC;
 581
 582         if (tts < 0)
 583                 tts = 0;
 584
 585         *time_to_sleep = tts;
 586 }
 587
 588 static int dispatch_events(bool forks, int timeout, int interval, int *times)
 589 {
 590         int child_exited = 0, status = 0;
 591         int time_to_sleep, sleep_time;
 592         struct timespec time_start, time_stop;
 593
 594         if (interval)
 595                 sleep_time = interval;
 596         else if (timeout)
 597                 sleep_time = timeout;
 598         else
 599                 sleep_time = 1000;
 600
 601         time_to_sleep = sleep_time;
 602
 603         while (!done) {
 604                 if (forks)
 605                         child_exited = waitpid(child_pid, &status, WNOHANG);
 606                 else
 607                         child_exited = !is_target_alive(&target, evsel_list->core.threads) ? 1 : 0;
 608
 609                 if (child_exited)
 610                         break;
 611
 612                 clock_gettime(CLOCK_MONOTONIC, &time_start);
 613                 if (!(evlist__poll(evsel_list, time_to_sleep) > 0)) { /* poll timeout or EINTR */
 614                         if (timeout || handle_interval(interval, times))
 615                                 break;
 616                         time_to_sleep = sleep_time;
 617                 } else { /* fd revent */
 618                         process_evlist(evsel_list, interval);
 619                         clock_gettime(CLOCK_MONOTONIC, &time_stop);
 620                         compute_tts(&time_start, &time_stop, &time_to_sleep);
 621                 }
 622         }
 623
 624         return status;
 625 }
 626
 627 enum counter_recovery {
 628         COUNTER_SKIP,
 629         COUNTER_RETRY,
 630         COUNTER_FATAL,
 631 };
 632
 633 static enum counter_recovery stat_handle_error(struct evsel *counter)
 634 {
 635         char msg[BUFSIZ];
 636         /*
 637          * PPC returns ENXIO for HW counters until 2.6.37
 638          * (behavior changed with commit b0a873e).
 639          */
 640         if (errno == EINVAL || errno == ENOSYS ||
 641             errno == ENOENT || errno == EOPNOTSUPP ||
 642             errno == ENXIO) {
 643                 if (verbose > 0)
 644                         ui__warning("%s event is not supported by the kernel.\n",
 645                                     evsel__name(counter));
 646                 counter->supported = false;
 647                 /*
 648                  * errored is a sticky flag that means one of the counter's
 649                  * cpu event had a problem and needs to be reexamined.
 650                  */
 651                 counter->errored = true;
 652
 653                 if ((evsel__leader(counter) != counter) ||
 654                     !(counter->core.leader->nr_members > 1))
 655                         return COUNTER_SKIP;
 656         } else if (evsel__fallback(counter, errno, msg, sizeof(msg))) {
 657                 if (verbose > 0)
 658                         ui__warning("%s\n", msg);
 659                 return COUNTER_RETRY;
 660         } else if (target__has_per_thread(&target) &&
 661                    evsel_list->core.threads &&
 662                    evsel_list->core.threads->err_thread != -1) {
 663                 /*
 664                  * For global --per-thread case, skip current
 665                  * error thread.
 666                  */
 667                 if (!thread_map__remove(evsel_list->core.threads,
 668                                         evsel_list->core.threads->err_thread)) {
 669                         evsel_list->core.threads->err_thread = -1;
 670                         return COUNTER_RETRY;
 671                 }
 672         } else if (counter->skippable) {
 673                 if (verbose > 0)
 674                         ui__warning("skipping event %s that kernel failed to open .\n",
 675                                     evsel__name(counter));
 676                 counter->supported = false;
 677                 counter->errored = true;
 678                 return COUNTER_SKIP;
 679         }
 680
 681         evsel__open_strerror(counter, &target, errno, msg, sizeof(msg));
 682         ui__error("%s\n", msg);
 683
 684         if (child_pid != -1)
 685                 kill(child_pid, SIGTERM);
 686         return COUNTER_FATAL;
 687 }
 688
 689 static int __run_perf_stat(int argc, const char **argv, int run_idx)
 690 {
 691         int interval = stat_config.interval;
 692         int times = stat_config.times;
 693         int timeout = stat_config.timeout;
 694         char msg[BUFSIZ];
 695         unsigned long long t0, t1;
 696         struct evsel *counter;
 697         size_t l;
 698         int status = 0;
 699         const bool forks = (argc > 0);
 700         bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false;
 701         struct evlist_cpu_iterator evlist_cpu_itr;
 702         struct affinity saved_affinity, *affinity = NULL;
 703         int err;
 704         bool second_pass = false;
 705
 706         if (forks) {
 707                 if (evlist__prepare_workload(evsel_list, &target, argv, is_pipe, workload_exec_failed_signal) < 0) {
 708                         perror("failed to prepare workload");
 709                         return -1;
 710                 }
 711                 child_pid = evsel_list->workload.pid;
 712         }
 713
 714         if (!cpu_map__is_dummy(evsel_list->core.user_requested_cpus)) {
 715                 if (affinity__setup(&saved_affinity) < 0)
 716                         return -1;
 717                 affinity = &saved_affinity;
 718         }
 719
 720         evlist__for_each_entry(evsel_list, counter) {
 721                 counter->reset_group = false;
 722                 if (bpf_counter__load(counter, &target))
 723                         return -1;
 724                 if (!(evsel__is_bperf(counter)))
 725                         all_counters_use_bpf = false;
 726         }
 727
 728         evlist__reset_aggr_stats(evsel_list);
 729
 730         evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) {
 731                 counter = evlist_cpu_itr.evsel;
 732
 733                 /*
 734                  * bperf calls evsel__open_per_cpu() in bperf__load(), so
 735                  * no need to call it again here.
 736                  */
 737                 if (target.use_bpf)
 738                         break;
 739
 740                 if (counter->reset_group || counter->errored)
 741                         continue;
 742                 if (evsel__is_bperf(counter))
 743                         continue;
 744 try_again:
 745                 if (create_perf_stat_counter(counter, &stat_config, &target,
 746                                              evlist_cpu_itr.cpu_map_idx) < 0) {
 747
 748                         /*
 749                          * Weak group failed. We cannot just undo this here
 750                          * because earlier CPUs might be in group mode, and the kernel
 751                          * doesn't support mixing group and non group reads. Defer
 752                          * it to later.
 753                          * Don't close here because we're in the wrong affinity.
 754                          */
 755                         if ((errno == EINVAL || errno == EBADF) &&
 756                                 evsel__leader(counter) != counter &&
 757                                 counter->weak_group) {
 758                                 evlist__reset_weak_group(evsel_list, counter, false);
 759                                 assert(counter->reset_group);
 760                                 second_pass = true;
 761                                 continue;
 762                         }
 763
 764                         switch (stat_handle_error(counter)) {
 765                         case COUNTER_FATAL:
 766                                 return -1;
 767                         case COUNTER_RETRY:
 768                                 goto try_again;
 769                         case COUNTER_SKIP:
 770                                 continue;
 771                         default:
 772                                 break;
 773                         }
 774
 775                 }
 776                 counter->supported = true;
 777         }
 778
 779         if (second_pass) {
 780                 /*
 781                  * Now redo all the weak group after closing them,
 782                  * and also close errored counters.
 783                  */
 784
 785                 /* First close errored or weak retry */
 786                 evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) {
 787                         counter = evlist_cpu_itr.evsel;
 788
 789                         if (!counter->reset_group && !counter->errored)
 790                                 continue;
 791
 792                         perf_evsel__close_cpu(&counter->core, evlist_cpu_itr.cpu_map_idx);
 793                 }
 794                 /* Now reopen weak */
 795                 evlist__for_each_cpu(evlist_cpu_itr, evsel_list, affinity) {
 796                         counter = evlist_cpu_itr.evsel;
 797
 798                         if (!counter->reset_group)
 799                                 continue;
 800 try_again_reset:
 801                         pr_debug2("reopening weak %s\n", evsel__name(counter));
 802                         if (create_perf_stat_counter(counter, &stat_config, &target,
 803                                                      evlist_cpu_itr.cpu_map_idx) < 0) {
 804
 805                                 switch (stat_handle_error(counter)) {
 806                                 case COUNTER_FATAL:
 807                                         return -1;
 808                                 case COUNTER_RETRY:
 809                                         goto try_again_reset;
 810                                 case COUNTER_SKIP:
 811                                         continue;
 812                                 default:
 813                                         break;
 814                                 }
 815                         }
 816                         counter->supported = true;
 817                 }
 818         }
 819         affinity__cleanup(affinity);
 820
 821         evlist__for_each_entry(evsel_list, counter) {
 822                 if (!counter->supported) {
 823                         perf_evsel__free_fd(&counter->core);
 824                         continue;
 825                 }
 826
 827                 l = strlen(counter->unit);
 828                 if (l > stat_config.unit_width)
 829                         stat_config.unit_width = l;
 830
 831                 if (evsel__should_store_id(counter) &&
 832                     evsel__store_ids(counter, evsel_list))
 833                         return -1;
 834         }
 835
 836         if (evlist__apply_filters(evsel_list, &counter)) {
 837                 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
 838                         counter->filter, evsel__name(counter), errno,
 839                         str_error_r(errno, msg, sizeof(msg)));
 840                 return -1;
 841         }
 842
 843         if (STAT_RECORD) {
 844                 int fd = perf_data__fd(&perf_stat.data);
 845
 846                 if (is_pipe) {
 847                         err = perf_header__write_pipe(perf_data__fd(&perf_stat.data));
 848                 } else {
 849                         err = perf_session__write_header(perf_stat.session, evsel_list,
 850                                                          fd, false);
 851                 }
 852
 853                 if (err < 0)
 854                         return err;
 855
 856                 err = perf_event__synthesize_stat_events(&stat_config, NULL, evsel_list,
 857                                                          process_synthesized_event, is_pipe);
 858                 if (err < 0)
 859                         return err;
 860         }
 861
 862         if (target.initial_delay) {
 863                 pr_info(EVLIST_DISABLED_MSG);
 864         } else {
 865                 err = enable_counters();
 866                 if (err)
 867                         return -1;
 868         }
 869
 870         /* Exec the command, if any */
 871         if (forks)
 872                 evlist__start_workload(evsel_list);
 873
 874         if (target.initial_delay > 0) {
 875                 usleep(target.initial_delay * USEC_PER_MSEC);
 876                 err = enable_counters();
 877                 if (err)
 878                         return -1;
 879
 880                 pr_info(EVLIST_ENABLED_MSG);
 881         }
 882
 883         t0 = rdclock();
 884         clock_gettime(CLOCK_MONOTONIC, &ref_time);
 885
 886         if (forks) {
 887                 if (interval || timeout || evlist__ctlfd_initialized(evsel_list))
 888                         status = dispatch_events(forks, timeout, interval, &times);
 889                 if (child_pid != -1) {
 890                         if (timeout)
 891                                 kill(child_pid, SIGTERM);
 892                         wait4(child_pid, &status, 0, &stat_config.ru_data);
 893                 }
 894
 895                 if (workload_exec_errno) {
 896                         const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
 897                         pr_err("Workload failed: %s\n", emsg);
 898                         return -1;
 899                 }
 900
 901                 if (WIFSIGNALED(status))
 902                         psignal(WTERMSIG(status), argv[0]);
 903         } else {
 904                 status = dispatch_events(forks, timeout, interval, &times);
 905         }
 906
 907         disable_counters();
 908
 909         t1 = rdclock();
 910
 911         if (stat_config.walltime_run_table)
 912                 stat_config.walltime_run[run_idx] = t1 - t0;
 913
 914         if (interval && stat_config.summary) {
 915                 stat_config.interval = 0;
 916                 stat_config.stop_read_counter = true;
 917                 init_stats(&walltime_nsecs_stats);
 918                 update_stats(&walltime_nsecs_stats, t1 - t0);
 919
 920                 evlist__copy_prev_raw_counts(evsel_list);
 921                 evlist__reset_prev_raw_counts(evsel_list);
 922                 evlist__reset_aggr_stats(evsel_list);
 923         } else {
 924                 update_stats(&walltime_nsecs_stats, t1 - t0);
 925                 update_rusage_stats(&ru_stats, &stat_config.ru_data);
 926         }
 927
 928         /*
 929          * Closing a group leader splits the group, and as we only disable
 930          * group leaders, results in remaining events becoming enabled. To
 931          * avoid arbitrary skew, we must read all counters before closing any
 932          * group leaders.
 933          */
 934         if (read_counters(&(struct timespec) { .tv_nsec = t1-t0 }) == 0)
 935                 process_counters();
 936
 937         /*
 938          * We need to keep evsel_list alive, because it's processed
 939          * later the evsel_list will be closed after.
 940          */
 941         if (!STAT_RECORD)
 942                 evlist__close(evsel_list);
 943
 944         return WEXITSTATUS(status);
 945 }
 946
 947 static int run_perf_stat(int argc, const char **argv, int run_idx)
 948 {
 949         int ret;
 950
 951         if (pre_cmd) {
 952                 ret = system(pre_cmd);
 953                 if (ret)
 954                         return ret;
 955         }
 956
 957         if (sync_run)
 958                 sync();
 959
 960         ret = __run_perf_stat(argc, argv, run_idx);
 961         if (ret)
 962                 return ret;
 963
 964         if (post_cmd) {
 965                 ret = system(post_cmd);
 966                 if (ret)
 967                         return ret;
 968         }
 969
 970         return ret;
 971 }
 972
 973 static void print_counters(struct timespec *ts, int argc, const char **argv)
 974 {
 975         /* Do not print anything if we record to the pipe. */
 976         if (STAT_RECORD && perf_stat.data.is_pipe)
 977                 return;
 978         if (quiet)
 979                 return;
 980
 981         evlist__print_counters(evsel_list, &stat_config, &target, ts, argc, argv);
 982 }
 983
 984 static volatile sig_atomic_t signr = -1;
 985
 986 static void skip_signal(int signo)
 987 {
 988         if ((child_pid == -1) || stat_config.interval)
 989                 done = 1;
 990
 991         signr = signo;
 992         /*
 993          * render child_pid harmless
 994          * won't send SIGTERM to a random
 995          * process in case of race condition
 996          * and fast PID recycling
 997          */
 998         child_pid = -1;
 999 }
1000
1001 static void sig_atexit(void)
1002 {
1003         sigset_t set, oset;
1004
1005         /*
1006          * avoid race condition with SIGCHLD handler
1007          * in skip_signal() which is modifying child_pid
1008          * goal is to avoid send SIGTERM to a random
1009          * process
1010          */
1011         sigemptyset(&set);
1012         sigaddset(&set, SIGCHLD);
1013         sigprocmask(SIG_BLOCK, &set, &oset);
1014
1015         if (child_pid != -1)
1016                 kill(child_pid, SIGTERM);
1017
1018         sigprocmask(SIG_SETMASK, &oset, NULL);
1019
1020         if (signr == -1)
1021                 return;
1022
1023         signal(signr, SIG_DFL);
1024         kill(getpid(), signr);
1025 }
1026
1027 void perf_stat__set_big_num(int set)
1028 {
1029         stat_config.big_num = (set != 0);
1030 }
1031
1032 void perf_stat__set_no_csv_summary(int set)
1033 {
1034         stat_config.no_csv_summary = (set != 0);
1035 }
1036
1037 static int stat__set_big_num(const struct option *opt __maybe_unused,
1038                              const char *s __maybe_unused, int unset)
1039 {
1040         big_num_opt = unset ? 0 : 1;
1041         perf_stat__set_big_num(!unset);
1042         return 0;
1043 }
1044
1045 static int enable_metric_only(const struct option *opt __maybe_unused,
1046                               const char *s __maybe_unused, int unset)
1047 {
1048         force_metric_only = true;
1049         stat_config.metric_only = !unset;
1050         return 0;
1051 }
1052
1053 static int append_metric_groups(const struct option *opt __maybe_unused,
1054                                const char *str,
1055                                int unset __maybe_unused)
1056 {
1057         if (metrics) {
1058                 char *tmp;
1059
1060                 if (asprintf(&tmp, "%s,%s", metrics, str) < 0)
1061                         return -ENOMEM;
1062                 free(metrics);
1063                 metrics = tmp;
1064         } else {
1065                 metrics = strdup(str);
1066                 if (!metrics)
1067                         return -ENOMEM;
1068         }
1069         return 0;
1070 }
1071
1072 static int parse_control_option(const struct option *opt,
1073                                 const char *str,
1074                                 int unset __maybe_unused)
1075 {
1076         struct perf_stat_config *config = opt->value;
1077
1078         return evlist__parse_control(str, &config->ctl_fd, &config->ctl_fd_ack, &config->ctl_fd_close);
1079 }
1080
1081 static int parse_stat_cgroups(const struct option *opt,
1082                               const char *str, int unset)
1083 {
1084         if (stat_config.cgroup_list) {
1085                 pr_err("--cgroup and --for-each-cgroup cannot be used together\n");
1086                 return -1;
1087         }
1088
1089         return parse_cgroups(opt, str, unset);
1090 }
1091
1092 static int parse_cputype(const struct option *opt,
1093                              const char *str,
1094                              int unset __maybe_unused)
1095 {
1096         const struct perf_pmu *pmu;
1097         struct evlist *evlist = *(struct evlist **)opt->value;
1098
1099         if (!list_empty(&evlist->core.entries)) {
1100                 fprintf(stderr, "Must define cputype before events/metrics\n");
1101                 return -1;
1102         }
1103
1104         pmu = perf_pmus__pmu_for_pmu_filter(str);
1105         if (!pmu) {
1106                 fprintf(stderr, "--cputype %s is not supported!\n", str);
1107                 return -1;
1108         }
1109         parse_events_option_args.pmu_filter = pmu->name;
1110
1111         return 0;
1112 }
1113
1114 static int parse_cache_level(const struct option *opt,
1115                              const char *str,
1116                              int unset __maybe_unused)
1117 {
1118         int level;
1119         u32 *aggr_mode = (u32 *)opt->value;
1120         u32 *aggr_level = (u32 *)opt->data;
1121
1122         /*
1123          * If no string is specified, aggregate based on the topology of
1124          * Last Level Cache (LLC). Since the LLC level can change from
1125          * architecture to architecture, set level greater than
1126          * MAX_CACHE_LVL which will be interpreted as LLC.
1127          */
1128         if (str == NULL) {
1129                 level = MAX_CACHE_LVL + 1;
1130                 goto out;
1131         }
1132
1133         /*
1134          * The format to specify cache level is LX or lX where X is the
1135          * cache level.
1136          */
1137         if (strlen(str) != 2 || (str[0] != 'l' && str[0] != 'L')) {
1138                 pr_err("Cache level must be of form L[1-%d], or l[1-%d]\n",
1139                        MAX_CACHE_LVL,
1140                        MAX_CACHE_LVL);
1141                 return -EINVAL;
1142         }
1143
1144         level = atoi(&str[1]);
1145         if (level < 1) {
1146                 pr_err("Cache level must be of form L[1-%d], or l[1-%d]\n",
1147                        MAX_CACHE_LVL,
1148                        MAX_CACHE_LVL);
1149                 return -EINVAL;
1150         }
1151
1152         if (level > MAX_CACHE_LVL) {
1153                 pr_err("perf only supports max cache level of %d.\n"
1154                        "Consider increasing MAX_CACHE_LVL\n", MAX_CACHE_LVL);
1155                 return -EINVAL;
1156         }
1157 out:
1158         *aggr_mode = AGGR_CACHE;
1159         *aggr_level = level;
1160         return 0;
1161 }
1162
1163 static struct option stat_options[] = {
1164         OPT_BOOLEAN('T', "transaction", &transaction_run,
1165                     "hardware transaction statistics"),
1166         OPT_CALLBACK('e', "event", &parse_events_option_args, "event",
1167                      "event selector. use 'perf list' to list available events",
1168                      parse_events_option),
1169         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1170                      "event filter", parse_filter),
1171         OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit,
1172                     "child tasks do not inherit counters"),
1173         OPT_STRING('p', "pid", &target.pid, "pid",
1174                    "stat events on existing process id"),
1175         OPT_STRING('t', "tid", &target.tid, "tid",
1176                    "stat events on existing thread id"),
1177 #ifdef HAVE_BPF_SKEL
1178         OPT_STRING('b', "bpf-prog", &target.bpf_str, "bpf-prog-id",
1179                    "stat events on existing bpf program id"),
1180         OPT_BOOLEAN(0, "bpf-counters", &target.use_bpf,
1181                     "use bpf program to count events"),
1182         OPT_STRING(0, "bpf-attr-map", &target.attr_map, "attr-map-path",
1183                    "path to perf_event_attr map"),
1184 #endif
1185         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1186                     "system-wide collection from all CPUs"),
1187         OPT_BOOLEAN(0, "scale", &stat_config.scale,
1188                     "Use --no-scale to disable counter scaling for multiplexing"),
1189         OPT_INCR('v', "verbose", &verbose,
1190                     "be more verbose (show counter open errors, etc)"),
1191         OPT_INTEGER('r', "repeat", &stat_config.run_count,
1192                     "repeat command and print average + stddev (max: 100, forever: 0)"),
1193         OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table,
1194                     "display details about each run (only with -r option)"),
1195         OPT_BOOLEAN('n', "null", &stat_config.null_run,
1196                     "null run - dont start any counters"),
1197         OPT_INCR('d', "detailed", &detailed_run,
1198                     "detailed run - start a lot of events"),
1199         OPT_BOOLEAN('S', "sync", &sync_run,
1200                     "call sync() before starting a run"),
1201         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1202                            "print large numbers with thousands\' separators",
1203                            stat__set_big_num),
1204         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1205                     "list of cpus to monitor in system-wide"),
1206         OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
1207                     "disable CPU count aggregation", AGGR_NONE),
1208         OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"),
1209         OPT_BOOLEAN(0, "hybrid-merge", &stat_config.hybrid_merge,
1210                     "Merge identical named hybrid events"),
1211         OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator",
1212                    "print counts with custom separator"),
1213         OPT_BOOLEAN('j', "json-output", &stat_config.json_output,
1214                    "print counts in JSON format"),
1215         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1216                      "monitor event in cgroup name only", parse_stat_cgroups),
1217         OPT_STRING(0, "for-each-cgroup", &stat_config.cgroup_list, "name",
1218                     "expand events for each cgroup"),
1219         OPT_STRING('o', "output", &output_name, "file", "output file name"),
1220         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1221         OPT_INTEGER(0, "log-fd", &output_fd,
1222                     "log output to fd, instead of stderr"),
1223         OPT_STRING(0, "pre", &pre_cmd, "command",
1224                         "command to run prior to the measured command"),
1225         OPT_STRING(0, "post", &post_cmd, "command",
1226                         "command to run after to the measured command"),
1227         OPT_UINTEGER('I', "interval-print", &stat_config.interval,
1228                     "print counts at regular interval in ms "
1229                     "(overhead is possible for values <= 100ms)"),
1230         OPT_INTEGER(0, "interval-count", &stat_config.times,
1231                     "print counts for fixed number of times"),
1232         OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear,
1233                     "clear screen in between new interval"),
1234         OPT_UINTEGER(0, "timeout", &stat_config.timeout,
1235                     "stop workload and print counts after a timeout period in ms (>= 10ms)"),
1236         OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
1237                      "aggregate counts per processor socket", AGGR_SOCKET),
1238         OPT_SET_UINT(0, "per-die", &stat_config.aggr_mode,
1239                      "aggregate counts per processor die", AGGR_DIE),
1240         OPT_CALLBACK_OPTARG(0, "per-cache", &stat_config.aggr_mode, &stat_config.aggr_level,
1241                             "cache level", "aggregate count at this cache level (Default: LLC)",
1242                             parse_cache_level),
1243         OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
1244                      "aggregate counts per physical processor core", AGGR_CORE),
1245         OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
1246                      "aggregate counts per thread", AGGR_THREAD),
1247         OPT_SET_UINT(0, "per-node", &stat_config.aggr_mode,
1248                      "aggregate counts per numa node", AGGR_NODE),
1249         OPT_INTEGER('D', "delay", &target.initial_delay,
1250                     "ms to wait before starting measurement after program start (-1: start with events disabled)"),
1251         OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL,
1252                         "Only print computed metrics. No raw values", enable_metric_only),
1253         OPT_BOOLEAN(0, "metric-no-group", &stat_config.metric_no_group,
1254                        "don't group metric events, impacts multiplexing"),
1255         OPT_BOOLEAN(0, "metric-no-merge", &stat_config.metric_no_merge,
1256                        "don't try to share events between metrics in a group"),
1257         OPT_BOOLEAN(0, "metric-no-threshold", &stat_config.metric_no_threshold,
1258                        "don't try to share events between metrics in a group  "),
1259         OPT_BOOLEAN(0, "topdown", &topdown_run,
1260                         "measure top-down statistics"),
1261         OPT_UINTEGER(0, "td-level", &stat_config.topdown_level,
1262                         "Set the metrics level for the top-down statistics (0: max level)"),
1263         OPT_BOOLEAN(0, "smi-cost", &smi_cost,
1264                         "measure SMI cost"),
1265         OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
1266                      "monitor specified metrics or metric groups (separated by ,)",
1267                      append_metric_groups),
1268         OPT_BOOLEAN_FLAG(0, "all-kernel", &stat_config.all_kernel,
1269                          "Configure all used events to run in kernel space.",
1270                          PARSE_OPT_EXCLUSIVE),
1271         OPT_BOOLEAN_FLAG(0, "all-user", &stat_config.all_user,
1272                          "Configure all used events to run in user space.",
1273                          PARSE_OPT_EXCLUSIVE),
1274         OPT_BOOLEAN(0, "percore-show-thread", &stat_config.percore_show_thread,
1275                     "Use with 'percore' event qualifier to show the event "
1276                     "counts of one hardware thread by sum up total hardware "
1277                     "threads of same physical core"),
1278         OPT_BOOLEAN(0, "summary", &stat_config.summary,
1279                        "print summary for interval mode"),
1280         OPT_BOOLEAN(0, "no-csv-summary", &stat_config.no_csv_summary,
1281                        "don't print 'summary' for CSV summary output"),
1282         OPT_BOOLEAN(0, "quiet", &quiet,
1283                         "don't print any output, messages or warnings (useful with record)"),
1284         OPT_CALLBACK(0, "cputype", &evsel_list, "hybrid cpu type",
1285                      "Only enable events on applying cpu with this type "
1286                      "for hybrid platform (e.g. core or atom)",
1287                      parse_cputype),
1288 #ifdef HAVE_LIBPFM
1289         OPT_CALLBACK(0, "pfm-events", &evsel_list, "event",
1290                 "libpfm4 event selector. use 'perf list' to list available events",
1291                 parse_libpfm_events_option),
1292 #endif
1293         OPT_CALLBACK(0, "control", &stat_config, "fd:ctl-fd[,ack-fd] or fifo:ctl-fifo[,ack-fifo]",
1294                      "Listen on ctl-fd descriptor for command to control measurement ('enable': enable events, 'disable': disable events).\n"
1295                      "\t\t\t  Optionally send control command completion ('ack\\n') to ack-fd descriptor.\n"
1296                      "\t\t\t  Alternatively, ctl-fifo / ack-fifo will be opened and used as ctl-fd / ack-fd.",
1297                       parse_control_option),
1298         OPT_CALLBACK_OPTARG(0, "iostat", &evsel_list, &stat_config, "default",
1299                             "measure I/O performance metrics provided by arch/platform",
1300                             iostat_parse),
1301         OPT_END()
1302 };
1303
1304 /**
1305  * Calculate the cache instance ID from the map in
1306  * /sys/devices/system/cpu/cpuX/cache/indexY/shared_cpu_list
1307  * Cache instance ID is the first CPU reported in the shared_cpu_list file.
1308  */
1309 static int cpu__get_cache_id_from_map(struct perf_cpu cpu, char *map)
1310 {
1311         int id;
1312         struct perf_cpu_map *cpu_map = perf_cpu_map__new(map);
1313
1314         /*
1315          * If the map contains no CPU, consider the current CPU to
1316          * be the first online CPU in the cache domain else use the
1317          * first online CPU of the cache domain as the ID.
1318          */
1319         if (perf_cpu_map__empty(cpu_map))
1320                 id = cpu.cpu;
1321         else
1322                 id = perf_cpu_map__cpu(cpu_map, 0).cpu;
1323
1324         /* Free the perf_cpu_map used to find the cache ID */
1325         perf_cpu_map__put(cpu_map);
1326
1327         return id;
1328 }
1329
1330 /**
1331  * cpu__get_cache_id - Returns 0 if successful in populating the
1332  * cache level and cache id. Cache level is read from
1333  * /sys/devices/system/cpu/cpuX/cache/indexY/level where as cache instance ID
1334  * is the first CPU reported by
1335  * /sys/devices/system/cpu/cpuX/cache/indexY/shared_cpu_list
1336  */
1337 static int cpu__get_cache_details(struct perf_cpu cpu, struct perf_cache *cache)
1338 {
1339         int ret = 0;
1340         u32 cache_level = stat_config.aggr_level;
1341         struct cpu_cache_level caches[MAX_CACHE_LVL];
1342         u32 i = 0, caches_cnt = 0;
1343
1344         cache->cache_lvl = (cache_level > MAX_CACHE_LVL) ? 0 : cache_level;
1345         cache->cache = -1;
1346
1347         ret = build_caches_for_cpu(cpu.cpu, caches, &caches_cnt);
1348         if (ret) {
1349                 /*
1350                  * If caches_cnt is not 0, cpu_cache_level data
1351                  * was allocated when building the topology.
1352                  * Free the allocated data before returning.
1353                  */
1354                 if (caches_cnt)
1355                         goto free_caches;
1356
1357                 return ret;
1358         }
1359
1360         if (!caches_cnt)
1361                 return -1;
1362
1363         /*
1364          * Save the data for the highest level if no
1365          * level was specified by the user.
1366          */
1367         if (cache_level > MAX_CACHE_LVL) {
1368                 int max_level_index = 0;
1369
1370                 for (i = 1; i < caches_cnt; ++i) {
1371                         if (caches[i].level > caches[max_level_index].level)
1372                                 max_level_index = i;
1373                 }
1374
1375                 cache->cache_lvl = caches[max_level_index].level;
1376                 cache->cache = cpu__get_cache_id_from_map(cpu, caches[max_level_index].map);
1377
1378                 /* Reset i to 0 to free entire caches[] */
1379                 i = 0;
1380                 goto free_caches;
1381         }
1382
1383         for (i = 0; i < caches_cnt; ++i) {
1384                 if (caches[i].level == cache_level) {
1385                         cache->cache_lvl = cache_level;
1386                         cache->cache = cpu__get_cache_id_from_map(cpu, caches[i].map);
1387                 }
1388
1389                 cpu_cache_level__free(&caches[i]);
1390         }
1391
1392 free_caches:
1393         /*
1394          * Free all the allocated cpu_cache_level data.
1395          */
1396         while (i < caches_cnt)
1397                 cpu_cache_level__free(&caches[i++]);
1398
1399         return ret;
1400 }
1401
1402 /**
1403  * aggr_cpu_id__cache - Create an aggr_cpu_id with cache instache ID, cache
1404  * level, die and socket populated with the cache instache ID, cache level,
1405  * die and socket for cpu. The function signature is compatible with
1406  * aggr_cpu_id_get_t.
1407  */
1408 static struct aggr_cpu_id aggr_cpu_id__cache(struct perf_cpu cpu, void *data)
1409 {
1410         int ret;
1411         struct aggr_cpu_id id;
1412         struct perf_cache cache;
1413
1414         id = aggr_cpu_id__die(cpu, data);
1415         if (aggr_cpu_id__is_empty(&id))
1416                 return id;
1417
1418         ret = cpu__get_cache_details(cpu, &cache);
1419         if (ret)
1420                 return id;
1421
1422         id.cache_lvl = cache.cache_lvl;
1423         id.cache = cache.cache;
1424         return id;
1425 }
1426
1427 static const char *const aggr_mode__string[] = {
1428         [AGGR_CORE] = "core",
1429         [AGGR_CACHE] = "cache",
1430         [AGGR_DIE] = "die",
1431         [AGGR_GLOBAL] = "global",
1432         [AGGR_NODE] = "node",
1433         [AGGR_NONE] = "none",
1434         [AGGR_SOCKET] = "socket",
1435         [AGGR_THREAD] = "thread",
1436         [AGGR_UNSET] = "unset",
1437 };
1438
1439 static struct aggr_cpu_id perf_stat__get_socket(struct perf_stat_config *config __maybe_unused,
1440                                                 struct perf_cpu cpu)
1441 {
1442         return aggr_cpu_id__socket(cpu, /*data=*/NULL);
1443 }
1444
1445 static struct aggr_cpu_id perf_stat__get_die(struct perf_stat_config *config __maybe_unused,
1446                                              struct perf_cpu cpu)
1447 {
1448         return aggr_cpu_id__die(cpu, /*data=*/NULL);
1449 }
1450
1451 static struct aggr_cpu_id perf_stat__get_cache_id(struct perf_stat_config *config __maybe_unused,
1452                                                   struct perf_cpu cpu)
1453 {
1454         return aggr_cpu_id__cache(cpu, /*data=*/NULL);
1455 }
1456
1457 static struct aggr_cpu_id perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
1458                                               struct perf_cpu cpu)
1459 {
1460         return aggr_cpu_id__core(cpu, /*data=*/NULL);
1461 }
1462
1463 static struct aggr_cpu_id perf_stat__get_node(struct perf_stat_config *config __maybe_unused,
1464                                               struct perf_cpu cpu)
1465 {
1466         return aggr_cpu_id__node(cpu, /*data=*/NULL);
1467 }
1468
1469 static struct aggr_cpu_id perf_stat__get_global(struct perf_stat_config *config __maybe_unused,
1470                                                 struct perf_cpu cpu)
1471 {
1472         return aggr_cpu_id__global(cpu, /*data=*/NULL);
1473 }
1474
1475 static struct aggr_cpu_id perf_stat__get_cpu(struct perf_stat_config *config __maybe_unused,
1476                                              struct perf_cpu cpu)
1477 {
1478         return aggr_cpu_id__cpu(cpu, /*data=*/NULL);
1479 }
1480
1481 static struct aggr_cpu_id perf_stat__get_aggr(struct perf_stat_config *config,
1482                                               aggr_get_id_t get_id, struct perf_cpu cpu)
1483 {
1484         struct aggr_cpu_id id;
1485
1486         /* per-process mode - should use global aggr mode */
1487         if (cpu.cpu == -1)
1488                 return get_id(config, cpu);
1489
1490         if (aggr_cpu_id__is_empty(&config->cpus_aggr_map->map[cpu.cpu]))
1491                 config->cpus_aggr_map->map[cpu.cpu] = get_id(config, cpu);
1492
1493         id = config->cpus_aggr_map->map[cpu.cpu];
1494         return id;
1495 }
1496
1497 static struct aggr_cpu_id perf_stat__get_socket_cached(struct perf_stat_config *config,
1498                                                        struct perf_cpu cpu)
1499 {
1500         return perf_stat__get_aggr(config, perf_stat__get_socket, cpu);
1501 }
1502
1503 static struct aggr_cpu_id perf_stat__get_die_cached(struct perf_stat_config *config,
1504                                                     struct perf_cpu cpu)
1505 {
1506         return perf_stat__get_aggr(config, perf_stat__get_die, cpu);
1507 }
1508
1509 static struct aggr_cpu_id perf_stat__get_cache_id_cached(struct perf_stat_config *config,
1510                                                          struct perf_cpu cpu)
1511 {
1512         return perf_stat__get_aggr(config, perf_stat__get_cache_id, cpu);
1513 }
1514
1515 static struct aggr_cpu_id perf_stat__get_core_cached(struct perf_stat_config *config,
1516                                                      struct perf_cpu cpu)
1517 {
1518         return perf_stat__get_aggr(config, perf_stat__get_core, cpu);
1519 }
1520
1521 static struct aggr_cpu_id perf_stat__get_node_cached(struct perf_stat_config *config,
1522                                                      struct perf_cpu cpu)
1523 {
1524         return perf_stat__get_aggr(config, perf_stat__get_node, cpu);
1525 }
1526
1527 static struct aggr_cpu_id perf_stat__get_global_cached(struct perf_stat_config *config,
1528                                                        struct perf_cpu cpu)
1529 {
1530         return perf_stat__get_aggr(config, perf_stat__get_global, cpu);
1531 }
1532
1533 static struct aggr_cpu_id perf_stat__get_cpu_cached(struct perf_stat_config *config,
1534                                                     struct perf_cpu cpu)
1535 {
1536         return perf_stat__get_aggr(config, perf_stat__get_cpu, cpu);
1537 }
1538
1539 static aggr_cpu_id_get_t aggr_mode__get_aggr(enum aggr_mode aggr_mode)
1540 {
1541         switch (aggr_mode) {
1542         case AGGR_SOCKET:
1543                 return aggr_cpu_id__socket;
1544         case AGGR_DIE:
1545                 return aggr_cpu_id__die;
1546         case AGGR_CACHE:
1547                 return aggr_cpu_id__cache;
1548         case AGGR_CORE:
1549                 return aggr_cpu_id__core;
1550         case AGGR_NODE:
1551                 return aggr_cpu_id__node;
1552         case AGGR_NONE:
1553                 return aggr_cpu_id__cpu;
1554         case AGGR_GLOBAL:
1555                 return aggr_cpu_id__global;
1556         case AGGR_THREAD:
1557         case AGGR_UNSET:
1558         case AGGR_MAX:
1559         default:
1560                 return NULL;
1561         }
1562 }
1563
1564 static aggr_get_id_t aggr_mode__get_id(enum aggr_mode aggr_mode)
1565 {
1566         switch (aggr_mode) {
1567         case AGGR_SOCKET:
1568                 return perf_stat__get_socket_cached;
1569         case AGGR_DIE:
1570                 return perf_stat__get_die_cached;
1571         case AGGR_CACHE:
1572                 return perf_stat__get_cache_id_cached;
1573         case AGGR_CORE:
1574                 return perf_stat__get_core_cached;
1575         case AGGR_NODE:
1576                 return perf_stat__get_node_cached;
1577         case AGGR_NONE:
1578                 return perf_stat__get_cpu_cached;
1579         case AGGR_GLOBAL:
1580                 return perf_stat__get_global_cached;
1581         case AGGR_THREAD:
1582         case AGGR_UNSET:
1583         case AGGR_MAX:
1584         default:
1585                 return NULL;
1586         }
1587 }
1588
1589 static int perf_stat_init_aggr_mode(void)
1590 {
1591         int nr;
1592         aggr_cpu_id_get_t get_id = aggr_mode__get_aggr(stat_config.aggr_mode);
1593
1594         if (get_id) {
1595                 bool needs_sort = stat_config.aggr_mode != AGGR_NONE;
1596                 stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.user_requested_cpus,
1597                                                          get_id, /*data=*/NULL, needs_sort);
1598                 if (!stat_config.aggr_map) {
1599                         pr_err("cannot build %s map\n", aggr_mode__string[stat_config.aggr_mode]);
1600                         return -1;
1601                 }
1602                 stat_config.aggr_get_id = aggr_mode__get_id(stat_config.aggr_mode);
1603         }
1604
1605         if (stat_config.aggr_mode == AGGR_THREAD) {
1606                 nr = perf_thread_map__nr(evsel_list->core.threads);
1607                 stat_config.aggr_map = cpu_aggr_map__empty_new(nr);
1608                 if (stat_config.aggr_map == NULL)
1609                         return -ENOMEM;
1610
1611                 for (int s = 0; s < nr; s++) {
1612                         struct aggr_cpu_id id = aggr_cpu_id__empty();
1613
1614                         id.thread_idx = s;
1615                         stat_config.aggr_map->map[s] = id;
1616                 }
1617                 return 0;
1618         }
1619
1620         /*
1621          * The evsel_list->cpus is the base we operate on,
1622          * taking the highest cpu number to be the size of
1623          * the aggregation translate cpumap.
1624          */
1625         if (evsel_list->core.user_requested_cpus)
1626                 nr = perf_cpu_map__max(evsel_list->core.user_requested_cpus).cpu;
1627         else
1628                 nr = 0;
1629         stat_config.cpus_aggr_map = cpu_aggr_map__empty_new(nr + 1);
1630         return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
1631 }
1632
1633 static void cpu_aggr_map__delete(struct cpu_aggr_map *map)
1634 {
1635         if (map) {
1636                 WARN_ONCE(refcount_read(&map->refcnt) != 0,
1637                           "cpu_aggr_map refcnt unbalanced\n");
1638                 free(map);
1639         }
1640 }
1641
1642 static void cpu_aggr_map__put(struct cpu_aggr_map *map)
1643 {
1644         if (map && refcount_dec_and_test(&map->refcnt))
1645                 cpu_aggr_map__delete(map);
1646 }
1647
1648 static void perf_stat__exit_aggr_mode(void)
1649 {
1650         cpu_aggr_map__put(stat_config.aggr_map);
1651         cpu_aggr_map__put(stat_config.cpus_aggr_map);
1652         stat_config.aggr_map = NULL;
1653         stat_config.cpus_aggr_map = NULL;
1654 }
1655
1656 static struct aggr_cpu_id perf_env__get_socket_aggr_by_cpu(struct perf_cpu cpu, void *data)
1657 {
1658         struct perf_env *env = data;
1659         struct aggr_cpu_id id = aggr_cpu_id__empty();
1660
1661         if (cpu.cpu != -1)
1662                 id.socket = env->cpu[cpu.cpu].socket_id;
1663
1664         return id;
1665 }
1666
1667 static struct aggr_cpu_id perf_env__get_die_aggr_by_cpu(struct perf_cpu cpu, void *data)
1668 {
1669         struct perf_env *env = data;
1670         struct aggr_cpu_id id = aggr_cpu_id__empty();
1671
1672         if (cpu.cpu != -1) {
1673                 /*
1674                  * die_id is relative to socket, so start
1675                  * with the socket ID and then add die to
1676                  * make a unique ID.
1677                  */
1678                 id.socket = env->cpu[cpu.cpu].socket_id;
1679                 id.die = env->cpu[cpu.cpu].die_id;
1680         }
1681
1682         return id;
1683 }
1684
1685 static void perf_env__get_cache_id_for_cpu(struct perf_cpu cpu, struct perf_env *env,
1686                                            u32 cache_level, struct aggr_cpu_id *id)
1687 {
1688         int i;
1689         int caches_cnt = env->caches_cnt;
1690         struct cpu_cache_level *caches = env->caches;
1691
1692         id->cache_lvl = (cache_level > MAX_CACHE_LVL) ? 0 : cache_level;
1693         id->cache = -1;
1694
1695         if (!caches_cnt)
1696                 return;
1697
1698         for (i = caches_cnt - 1; i > -1; --i) {
1699                 struct perf_cpu_map *cpu_map;
1700                 int map_contains_cpu;
1701
1702                 /*
1703                  * If user has not specified a level, find the fist level with
1704                  * the cpu in the map. Since building the map is expensive, do
1705                  * this only if levels match.
1706                  */
1707                 if (cache_level <= MAX_CACHE_LVL && caches[i].level != cache_level)
1708                         continue;
1709
1710                 cpu_map = perf_cpu_map__new(caches[i].map);
1711                 map_contains_cpu = perf_cpu_map__idx(cpu_map, cpu);
1712                 perf_cpu_map__put(cpu_map);
1713
1714                 if (map_contains_cpu != -1) {
1715                         id->cache_lvl = caches[i].level;
1716                         id->cache = cpu__get_cache_id_from_map(cpu, caches[i].map);
1717                         return;
1718                 }
1719         }
1720 }
1721
1722 static struct aggr_cpu_id perf_env__get_cache_aggr_by_cpu(struct perf_cpu cpu,
1723                                                           void *data)
1724 {
1725         struct perf_env *env = data;
1726         struct aggr_cpu_id id = aggr_cpu_id__empty();
1727
1728         if (cpu.cpu != -1) {
1729                 u32 cache_level = (perf_stat.aggr_level) ?: stat_config.aggr_level;
1730
1731                 id.socket = env->cpu[cpu.cpu].socket_id;
1732                 id.die = env->cpu[cpu.cpu].die_id;
1733                 perf_env__get_cache_id_for_cpu(cpu, env, cache_level, &id);
1734         }
1735
1736         return id;
1737 }
1738
1739 static struct aggr_cpu_id perf_env__get_core_aggr_by_cpu(struct perf_cpu cpu, void *data)
1740 {
1741         struct perf_env *env = data;
1742         struct aggr_cpu_id id = aggr_cpu_id__empty();
1743
1744         if (cpu.cpu != -1) {
1745                 /*
1746                  * core_id is relative to socket and die,
1747                  * we need a global id. So we set
1748                  * socket, die id and core id
1749                  */
1750                 id.socket = env->cpu[cpu.cpu].socket_id;
1751                 id.die = env->cpu[cpu.cpu].die_id;
1752                 id.core = env->cpu[cpu.cpu].core_id;
1753         }
1754
1755         return id;
1756 }
1757
1758 static struct aggr_cpu_id perf_env__get_cpu_aggr_by_cpu(struct perf_cpu cpu, void *data)
1759 {
1760         struct perf_env *env = data;
1761         struct aggr_cpu_id id = aggr_cpu_id__empty();
1762
1763         if (cpu.cpu != -1) {
1764                 /*
1765                  * core_id is relative to socket and die,
1766                  * we need a global id. So we set
1767                  * socket, die id and core id
1768                  */
1769                 id.socket = env->cpu[cpu.cpu].socket_id;
1770                 id.die = env->cpu[cpu.cpu].die_id;
1771                 id.core = env->cpu[cpu.cpu].core_id;
1772                 id.cpu = cpu;
1773         }
1774
1775         return id;
1776 }
1777
1778 static struct aggr_cpu_id perf_env__get_node_aggr_by_cpu(struct perf_cpu cpu, void *data)
1779 {
1780         struct aggr_cpu_id id = aggr_cpu_id__empty();
1781
1782         id.node = perf_env__numa_node(data, cpu);
1783         return id;
1784 }
1785
1786 static struct aggr_cpu_id perf_env__get_global_aggr_by_cpu(struct perf_cpu cpu __maybe_unused,
1787                                                            void *data __maybe_unused)
1788 {
1789         struct aggr_cpu_id id = aggr_cpu_id__empty();
1790
1791         /* it always aggregates to the cpu 0 */
1792         id.cpu = (struct perf_cpu){ .cpu = 0 };
1793         return id;
1794 }
1795
1796 static struct aggr_cpu_id perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused,
1797                                                      struct perf_cpu cpu)
1798 {
1799         return perf_env__get_socket_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1800 }
1801 static struct aggr_cpu_id perf_stat__get_die_file(struct perf_stat_config *config __maybe_unused,
1802                                                   struct perf_cpu cpu)
1803 {
1804         return perf_env__get_die_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1805 }
1806
1807 static struct aggr_cpu_id perf_stat__get_cache_file(struct perf_stat_config *config __maybe_unused,
1808                                                     struct perf_cpu cpu)
1809 {
1810         return perf_env__get_cache_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1811 }
1812
1813 static struct aggr_cpu_id perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused,
1814                                                    struct perf_cpu cpu)
1815 {
1816         return perf_env__get_core_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1817 }
1818
1819 static struct aggr_cpu_id perf_stat__get_cpu_file(struct perf_stat_config *config __maybe_unused,
1820                                                   struct perf_cpu cpu)
1821 {
1822         return perf_env__get_cpu_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1823 }
1824
1825 static struct aggr_cpu_id perf_stat__get_node_file(struct perf_stat_config *config __maybe_unused,
1826                                                    struct perf_cpu cpu)
1827 {
1828         return perf_env__get_node_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1829 }
1830
1831 static struct aggr_cpu_id perf_stat__get_global_file(struct perf_stat_config *config __maybe_unused,
1832                                                      struct perf_cpu cpu)
1833 {
1834         return perf_env__get_global_aggr_by_cpu(cpu, &perf_stat.session->header.env);
1835 }
1836
1837 static aggr_cpu_id_get_t aggr_mode__get_aggr_file(enum aggr_mode aggr_mode)
1838 {
1839         switch (aggr_mode) {
1840         case AGGR_SOCKET:
1841                 return perf_env__get_socket_aggr_by_cpu;
1842         case AGGR_DIE:
1843                 return perf_env__get_die_aggr_by_cpu;
1844         case AGGR_CACHE:
1845                 return perf_env__get_cache_aggr_by_cpu;
1846         case AGGR_CORE:
1847                 return perf_env__get_core_aggr_by_cpu;
1848         case AGGR_NODE:
1849                 return perf_env__get_node_aggr_by_cpu;
1850         case AGGR_GLOBAL:
1851                 return perf_env__get_global_aggr_by_cpu;
1852         case AGGR_NONE:
1853                 return perf_env__get_cpu_aggr_by_cpu;
1854         case AGGR_THREAD:
1855         case AGGR_UNSET:
1856         case AGGR_MAX:
1857         default:
1858                 return NULL;
1859         }
1860 }
1861
1862 static aggr_get_id_t aggr_mode__get_id_file(enum aggr_mode aggr_mode)
1863 {
1864         switch (aggr_mode) {
1865         case AGGR_SOCKET:
1866                 return perf_stat__get_socket_file;
1867         case AGGR_DIE:
1868                 return perf_stat__get_die_file;
1869         case AGGR_CACHE:
1870                 return perf_stat__get_cache_file;
1871         case AGGR_CORE:
1872                 return perf_stat__get_core_file;
1873         case AGGR_NODE:
1874                 return perf_stat__get_node_file;
1875         case AGGR_GLOBAL:
1876                 return perf_stat__get_global_file;
1877         case AGGR_NONE:
1878                 return perf_stat__get_cpu_file;
1879         case AGGR_THREAD:
1880         case AGGR_UNSET:
1881         case AGGR_MAX:
1882         default:
1883                 return NULL;
1884         }
1885 }
1886
1887 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
1888 {
1889         struct perf_env *env = &st->session->header.env;
1890         aggr_cpu_id_get_t get_id = aggr_mode__get_aggr_file(stat_config.aggr_mode);
1891         bool needs_sort = stat_config.aggr_mode != AGGR_NONE;
1892
1893         if (stat_config.aggr_mode == AGGR_THREAD) {
1894                 int nr = perf_thread_map__nr(evsel_list->core.threads);
1895
1896                 stat_config.aggr_map = cpu_aggr_map__empty_new(nr);
1897                 if (stat_config.aggr_map == NULL)
1898                         return -ENOMEM;
1899
1900                 for (int s = 0; s < nr; s++) {
1901                         struct aggr_cpu_id id = aggr_cpu_id__empty();
1902
1903                         id.thread_idx = s;
1904                         stat_config.aggr_map->map[s] = id;
1905                 }
1906                 return 0;
1907         }
1908
1909         if (!get_id)
1910                 return 0;
1911
1912         stat_config.aggr_map = cpu_aggr_map__new(evsel_list->core.user_requested_cpus,
1913                                                  get_id, env, needs_sort);
1914         if (!stat_config.aggr_map) {
1915                 pr_err("cannot build %s map\n", aggr_mode__string[stat_config.aggr_mode]);
1916                 return -1;
1917         }
1918         stat_config.aggr_get_id = aggr_mode__get_id_file(stat_config.aggr_mode);
1919         return 0;
1920 }
1921
1922 /*
1923  * Add default attributes, if there were no attributes specified or
1924  * if -d/--detailed, -d -d or -d -d -d is used:
1925  */
1926 static int add_default_attributes(void)
1927 {
1928         struct perf_event_attr default_attrs0[] = {
1929
1930   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
1931   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
1932   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
1933   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
1934
1935   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
1936 };
1937         struct perf_event_attr frontend_attrs[] = {
1938   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1939 };
1940         struct perf_event_attr backend_attrs[] = {
1941   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
1942 };
1943         struct perf_event_attr default_attrs1[] = {
1944   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
1945   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
1946   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
1947
1948 };
1949
1950 /*
1951  * Detailed stats (-d), covering the L1 and last level data caches:
1952  */
1953         struct perf_event_attr detailed_attrs[] = {
1954
1955   { .type = PERF_TYPE_HW_CACHE,
1956     .config =
1957          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1958         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1959         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1960
1961   { .type = PERF_TYPE_HW_CACHE,
1962     .config =
1963          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1964         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1965         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1966
1967   { .type = PERF_TYPE_HW_CACHE,
1968     .config =
1969          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1970         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1971         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1972
1973   { .type = PERF_TYPE_HW_CACHE,
1974     .config =
1975          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1976         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1977         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1978 };
1979
1980 /*
1981  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1982  */
1983         struct perf_event_attr very_detailed_attrs[] = {
1984
1985   { .type = PERF_TYPE_HW_CACHE,
1986     .config =
1987          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1988         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1989         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1990
1991   { .type = PERF_TYPE_HW_CACHE,
1992     .config =
1993          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1994         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1995         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1996
1997   { .type = PERF_TYPE_HW_CACHE,
1998     .config =
1999          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
2000         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2001         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2002
2003   { .type = PERF_TYPE_HW_CACHE,
2004     .config =
2005          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
2006         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2007         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2008
2009   { .type = PERF_TYPE_HW_CACHE,
2010     .config =
2011          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
2012         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2013         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2014
2015   { .type = PERF_TYPE_HW_CACHE,
2016     .config =
2017          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
2018         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2019         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2020
2021 };
2022
2023 /*
2024  * Very, very detailed stats (-d -d -d), adding prefetch events:
2025  */
2026         struct perf_event_attr very_very_detailed_attrs[] = {
2027
2028   { .type = PERF_TYPE_HW_CACHE,
2029     .config =
2030          PERF_COUNT_HW_CACHE_L1D                <<  0  |
2031         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
2032         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2033
2034   { .type = PERF_TYPE_HW_CACHE,
2035     .config =
2036          PERF_COUNT_HW_CACHE_L1D                <<  0  |
2037         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
2038         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2039 };
2040
2041         struct perf_event_attr default_null_attrs[] = {};
2042         const char *pmu = parse_events_option_args.pmu_filter ?: "all";
2043
2044         /* Set attrs if no event is selected and !null_run: */
2045         if (stat_config.null_run)
2046                 return 0;
2047
2048         if (transaction_run) {
2049                 /* Handle -T as -M transaction. Once platform specific metrics
2050                  * support has been added to the json files, all architectures
2051                  * will use this approach. To determine transaction support
2052                  * on an architecture test for such a metric name.
2053                  */
2054                 if (!metricgroup__has_metric(pmu, "transaction")) {
2055                         pr_err("Missing transaction metrics\n");
2056                         return -1;
2057                 }
2058                 return metricgroup__parse_groups(evsel_list, pmu, "transaction",
2059                                                 stat_config.metric_no_group,
2060                                                 stat_config.metric_no_merge,
2061                                                 stat_config.metric_no_threshold,
2062                                                 stat_config.user_requested_cpu_list,
2063                                                 stat_config.system_wide,
2064                                                 &stat_config.metric_events);
2065         }
2066
2067         if (smi_cost) {
2068                 int smi;
2069
2070                 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
2071                         pr_err("freeze_on_smi is not supported.\n");
2072                         return -1;
2073                 }
2074
2075                 if (!smi) {
2076                         if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) {
2077                                 fprintf(stderr, "Failed to set freeze_on_smi.\n");
2078                                 return -1;
2079                         }
2080                         smi_reset = true;
2081                 }
2082
2083                 if (!metricgroup__has_metric(pmu, "smi")) {
2084                         pr_err("Missing smi metrics\n");
2085                         return -1;
2086                 }
2087
2088                 if (!force_metric_only)
2089                         stat_config.metric_only = true;
2090
2091                 return metricgroup__parse_groups(evsel_list, pmu, "smi",
2092                                                 stat_config.metric_no_group,
2093                                                 stat_config.metric_no_merge,
2094                                                 stat_config.metric_no_threshold,
2095                                                 stat_config.user_requested_cpu_list,
2096                                                 stat_config.system_wide,
2097                                                 &stat_config.metric_events);
2098         }
2099
2100         if (topdown_run) {
2101                 unsigned int max_level = metricgroups__topdown_max_level();
2102                 char str[] = "TopdownL1";
2103
2104                 if (!force_metric_only)
2105                         stat_config.metric_only = true;
2106
2107                 if (!max_level) {
2108                         pr_err("Topdown requested but the topdown metric groups aren't present.\n"
2109                                 "(See perf list the metric groups have names like TopdownL1)\n");
2110                         return -1;
2111                 }
2112                 if (stat_config.topdown_level > max_level) {
2113                         pr_err("Invalid top-down metrics level. The max level is %u.\n", max_level);
2114                         return -1;
2115                 } else if (!stat_config.topdown_level)
2116                         stat_config.topdown_level = 1;
2117
2118                 if (!stat_config.interval && !stat_config.metric_only) {
2119                         fprintf(stat_config.output,
2120                                 "Topdown accuracy may decrease when measuring long periods.\n"
2121                                 "Please print the result regularly, e.g. -I1000\n");
2122                 }
2123                 str[8] = stat_config.topdown_level + '0';
2124                 if (metricgroup__parse_groups(evsel_list,
2125                                                 pmu, str,
2126                                                 /*metric_no_group=*/false,
2127                                                 /*metric_no_merge=*/false,
2128                                                 /*metric_no_threshold=*/true,
2129                                                 stat_config.user_requested_cpu_list,
2130                                                 stat_config.system_wide,
2131                                                 &stat_config.metric_events) < 0)
2132                         return -1;
2133         }
2134
2135         if (!stat_config.topdown_level)
2136                 stat_config.topdown_level = 1;
2137
2138         if (!evsel_list->core.nr_entries) {
2139                 /* No events so add defaults. */
2140                 if (target__has_cpu(&target))
2141                         default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
2142
2143                 if (evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
2144                         return -1;
2145                 if (perf_pmus__have_event("cpu", "stalled-cycles-frontend")) {
2146                         if (evlist__add_default_attrs(evsel_list, frontend_attrs) < 0)
2147                                 return -1;
2148                 }
2149                 if (perf_pmus__have_event("cpu", "stalled-cycles-backend")) {
2150                         if (evlist__add_default_attrs(evsel_list, backend_attrs) < 0)
2151                                 return -1;
2152                 }
2153                 if (evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
2154                         return -1;
2155                 /*
2156                  * Add TopdownL1 metrics if they exist. To minimize
2157                  * multiplexing, don't request threshold computation.
2158                  */
2159                 if (metricgroup__has_metric(pmu, "Default")) {
2160                         struct evlist *metric_evlist = evlist__new();
2161                         struct evsel *metric_evsel;
2162
2163                         if (!metric_evlist)
2164                                 return -1;
2165
2166                         if (metricgroup__parse_groups(metric_evlist, pmu, "Default",
2167                                                         /*metric_no_group=*/false,
2168                                                         /*metric_no_merge=*/false,
2169                                                         /*metric_no_threshold=*/true,
2170                                                         stat_config.user_requested_cpu_list,
2171                                                         stat_config.system_wide,
2172                                                         &stat_config.metric_events) < 0)
2173                                 return -1;
2174
2175                         evlist__for_each_entry(metric_evlist, metric_evsel) {
2176                                 metric_evsel->skippable = true;
2177                                 metric_evsel->default_metricgroup = true;
2178                         }
2179                         evlist__splice_list_tail(evsel_list, &metric_evlist->core.entries);
2180                         evlist__delete(metric_evlist);
2181                 }
2182
2183                 /* Platform specific attrs */
2184                 if (evlist__add_default_attrs(evsel_list, default_null_attrs) < 0)
2185                         return -1;
2186         }
2187
2188         /* Detailed events get appended to the event list: */
2189
2190         if (detailed_run <  1)
2191                 return 0;
2192
2193         /* Append detailed run extra attributes: */
2194         if (evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
2195                 return -1;
2196
2197         if (detailed_run < 2)
2198                 return 0;
2199
2200         /* Append very detailed run extra attributes: */
2201         if (evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
2202                 return -1;
2203
2204         if (detailed_run < 3)
2205                 return 0;
2206
2207         /* Append very, very detailed run extra attributes: */
2208         return evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
2209 }
2210
2211 static const char * const stat_record_usage[] = {
2212         "perf stat record [<options>]",
2213         NULL,
2214 };
2215
2216 static void init_features(struct perf_session *session)
2217 {
2218         int feat;
2219
2220         for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
2221                 perf_header__set_feat(&session->header, feat);
2222
2223         perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT);
2224         perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
2225         perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
2226         perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
2227         perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
2228 }
2229
2230 static int __cmd_record(int argc, const char **argv)
2231 {
2232         struct perf_session *session;
2233         struct perf_data *data = &perf_stat.data;
2234
2235         argc = parse_options(argc, argv, stat_options, stat_record_usage,
2236                              PARSE_OPT_STOP_AT_NON_OPTION);
2237
2238         if (output_name)
2239                 data->path = output_name;
2240
2241         if (stat_config.run_count != 1 || forever) {
2242                 pr_err("Cannot use -r option with perf stat record.\n");
2243                 return -1;
2244         }
2245
2246         session = perf_session__new(data, NULL);
2247         if (IS_ERR(session)) {
2248                 pr_err("Perf session creation failed\n");
2249                 return PTR_ERR(session);
2250         }
2251
2252         init_features(session);
2253
2254         session->evlist   = evsel_list;
2255         perf_stat.session = session;
2256         perf_stat.record  = true;
2257         return argc;
2258 }
2259
2260 static int process_stat_round_event(struct perf_session *session,
2261                                     union perf_event *event)
2262 {
2263         struct perf_record_stat_round *stat_round = &event->stat_round;
2264         struct timespec tsh, *ts = NULL;
2265         const char **argv = session->header.env.cmdline_argv;
2266         int argc = session->header.env.nr_cmdline;
2267
2268         process_counters();
2269
2270         if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
2271                 update_stats(&walltime_nsecs_stats, stat_round->time);
2272
2273         if (stat_config.interval && stat_round->time) {
2274                 tsh.tv_sec  = stat_round->time / NSEC_PER_SEC;
2275                 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
2276                 ts = &tsh;
2277         }
2278
2279         print_counters(ts, argc, argv);
2280         return 0;
2281 }
2282
2283 static
2284 int process_stat_config_event(struct perf_session *session,
2285                               union perf_event *event)
2286 {
2287         struct perf_tool *tool = session->tool;
2288         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2289
2290         perf_event__read_stat_config(&stat_config, &event->stat_config);
2291
2292         if (perf_cpu_map__empty(st->cpus)) {
2293                 if (st->aggr_mode != AGGR_UNSET)
2294                         pr_warning("warning: processing task data, aggregation mode not set\n");
2295         } else if (st->aggr_mode != AGGR_UNSET) {
2296                 stat_config.aggr_mode = st->aggr_mode;
2297         }
2298
2299         if (perf_stat.data.is_pipe)
2300                 perf_stat_init_aggr_mode();
2301         else
2302                 perf_stat_init_aggr_mode_file(st);
2303
2304         if (stat_config.aggr_map) {
2305                 int nr_aggr = stat_config.aggr_map->nr;
2306
2307                 if (evlist__alloc_aggr_stats(session->evlist, nr_aggr) < 0) {
2308                         pr_err("cannot allocate aggr counts\n");
2309                         return -1;
2310                 }
2311         }
2312         return 0;
2313 }
2314
2315 static int set_maps(struct perf_stat *st)
2316 {
2317         if (!st->cpus || !st->threads)
2318                 return 0;
2319
2320         if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
2321                 return -EINVAL;
2322
2323         perf_evlist__set_maps(&evsel_list->core, st->cpus, st->threads);
2324
2325         if (evlist__alloc_stats(&stat_config, evsel_list, /*alloc_raw=*/true))
2326                 return -ENOMEM;
2327
2328         st->maps_allocated = true;
2329         return 0;
2330 }
2331
2332 static
2333 int process_thread_map_event(struct perf_session *session,
2334                              union perf_event *event)
2335 {
2336         struct perf_tool *tool = session->tool;
2337         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2338
2339         if (st->threads) {
2340                 pr_warning("Extra thread map event, ignoring.\n");
2341                 return 0;
2342         }
2343
2344         st->threads = thread_map__new_event(&event->thread_map);
2345         if (!st->threads)
2346                 return -ENOMEM;
2347
2348         return set_maps(st);
2349 }
2350
2351 static
2352 int process_cpu_map_event(struct perf_session *session,
2353                           union perf_event *event)
2354 {
2355         struct perf_tool *tool = session->tool;
2356         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2357         struct perf_cpu_map *cpus;
2358
2359         if (st->cpus) {
2360                 pr_warning("Extra cpu map event, ignoring.\n");
2361                 return 0;
2362         }
2363
2364         cpus = cpu_map__new_data(&event->cpu_map.data);
2365         if (!cpus)
2366                 return -ENOMEM;
2367
2368         st->cpus = cpus;
2369         return set_maps(st);
2370 }
2371
2372 static const char * const stat_report_usage[] = {
2373         "perf stat report [<options>]",
2374         NULL,
2375 };
2376
2377 static struct perf_stat perf_stat = {
2378         .tool = {
2379                 .attr           = perf_event__process_attr,
2380                 .event_update   = perf_event__process_event_update,
2381                 .thread_map     = process_thread_map_event,
2382                 .cpu_map        = process_cpu_map_event,
2383                 .stat_config    = process_stat_config_event,
2384                 .stat           = perf_event__process_stat_event,
2385                 .stat_round     = process_stat_round_event,
2386         },
2387         .aggr_mode      = AGGR_UNSET,
2388         .aggr_level     = 0,
2389 };
2390
2391 static int __cmd_report(int argc, const char **argv)
2392 {
2393         struct perf_session *session;
2394         const struct option options[] = {
2395         OPT_STRING('i', "input", &input_name, "file", "input file name"),
2396         OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
2397                      "aggregate counts per processor socket", AGGR_SOCKET),
2398         OPT_SET_UINT(0, "per-die", &perf_stat.aggr_mode,
2399                      "aggregate counts per processor die", AGGR_DIE),
2400         OPT_CALLBACK_OPTARG(0, "per-cache", &perf_stat.aggr_mode, &perf_stat.aggr_level,
2401                             "cache level",
2402                             "aggregate count at this cache level (Default: LLC)",
2403                             parse_cache_level),
2404         OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
2405                      "aggregate counts per physical processor core", AGGR_CORE),
2406         OPT_SET_UINT(0, "per-node", &perf_stat.aggr_mode,
2407                      "aggregate counts per numa node", AGGR_NODE),
2408         OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
2409                      "disable CPU count aggregation", AGGR_NONE),
2410         OPT_END()
2411         };
2412         struct stat st;
2413         int ret;
2414
2415         argc = parse_options(argc, argv, options, stat_report_usage, 0);
2416
2417         if (!input_name || !strlen(input_name)) {
2418                 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
2419                         input_name = "-";
2420                 else
2421                         input_name = "perf.data";
2422         }
2423
2424         perf_stat.data.path = input_name;
2425         perf_stat.data.mode = PERF_DATA_MODE_READ;
2426
2427         session = perf_session__new(&perf_stat.data, &perf_stat.tool);
2428         if (IS_ERR(session))
2429                 return PTR_ERR(session);
2430
2431         perf_stat.session  = session;
2432         stat_config.output = stderr;
2433         evlist__delete(evsel_list);
2434         evsel_list         = session->evlist;
2435
2436         ret = perf_session__process_events(session);
2437         if (ret)
2438                 return ret;
2439
2440         perf_session__delete(session);
2441         return 0;
2442 }
2443
2444 static void setup_system_wide(int forks)
2445 {
2446         /*
2447          * Make system wide (-a) the default target if
2448          * no target was specified and one of following
2449          * conditions is met:
2450          *
2451          *   - there's no workload specified
2452          *   - there is workload specified but all requested
2453          *     events are system wide events
2454          */
2455         if (!target__none(&target))
2456                 return;
2457
2458         if (!forks)
2459                 target.system_wide = true;
2460         else {
2461                 struct evsel *counter;
2462
2463                 evlist__for_each_entry(evsel_list, counter) {
2464                         if (!counter->core.requires_cpu &&
2465                             !evsel__name_is(counter, "duration_time")) {
2466                                 return;
2467                         }
2468                 }
2469
2470                 if (evsel_list->core.nr_entries)
2471                         target.system_wide = true;
2472         }
2473 }
2474
2475 int cmd_stat(int argc, const char **argv)
2476 {
2477         const char * const stat_usage[] = {
2478                 "perf stat [<options>] [<command>]",
2479                 NULL
2480         };
2481         int status = -EINVAL, run_idx, err;
2482         const char *mode;
2483         FILE *output = stderr;
2484         unsigned int interval, timeout;
2485         const char * const stat_subcommands[] = { "record", "report" };
2486         char errbuf[BUFSIZ];
2487
2488         setlocale(LC_ALL, "");
2489
2490         evsel_list = evlist__new();
2491         if (evsel_list == NULL)
2492                 return -ENOMEM;
2493
2494         parse_events__shrink_config_terms();
2495
2496         /* String-parsing callback-based options would segfault when negated */
2497         set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG);
2498         set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG);
2499         set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG);
2500
2501         argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
2502                                         (const char **) stat_usage,
2503                                         PARSE_OPT_STOP_AT_NON_OPTION);
2504
2505         if (stat_config.csv_sep) {
2506                 stat_config.csv_output = true;
2507                 if (!strcmp(stat_config.csv_sep, "\\t"))
2508                         stat_config.csv_sep = "\t";
2509         } else
2510                 stat_config.csv_sep = DEFAULT_SEPARATOR;
2511
2512         if (argc && strlen(argv[0]) > 2 && strstarts("record", argv[0])) {
2513                 argc = __cmd_record(argc, argv);
2514                 if (argc < 0)
2515                         return -1;
2516         } else if (argc && strlen(argv[0]) > 2 && strstarts("report", argv[0]))
2517                 return __cmd_report(argc, argv);
2518
2519         interval = stat_config.interval;
2520         timeout = stat_config.timeout;
2521
2522         /*
2523          * For record command the -o is already taken care of.
2524          */
2525         if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
2526                 output = NULL;
2527
2528         if (output_name && output_fd) {
2529                 fprintf(stderr, "cannot use both --output and --log-fd\n");
2530                 parse_options_usage(stat_usage, stat_options, "o", 1);
2531                 parse_options_usage(NULL, stat_options, "log-fd", 0);
2532                 goto out;
2533         }
2534
2535         if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) {
2536                 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
2537                 goto out;
2538         }
2539
2540         if (stat_config.metric_only && stat_config.run_count > 1) {
2541                 fprintf(stderr, "--metric-only is not supported with -r\n");
2542                 goto out;
2543         }
2544
2545         if (stat_config.walltime_run_table && stat_config.run_count <= 1) {
2546                 fprintf(stderr, "--table is only supported with -r\n");
2547                 parse_options_usage(stat_usage, stat_options, "r", 1);
2548                 parse_options_usage(NULL, stat_options, "table", 0);
2549                 goto out;
2550         }
2551
2552         if (output_fd < 0) {
2553                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
2554                 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
2555                 goto out;
2556         }
2557
2558         if (!output && !quiet) {
2559                 struct timespec tm;
2560                 mode = append_file ? "a" : "w";
2561
2562                 output = fopen(output_name, mode);
2563                 if (!output) {
2564                         perror("failed to create output file");
2565                         return -1;
2566                 }
2567                 if (!stat_config.json_output) {
2568                         clock_gettime(CLOCK_REALTIME, &tm);
2569                         fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
2570                 }
2571         } else if (output_fd > 0) {
2572                 mode = append_file ? "a" : "w";
2573                 output = fdopen(output_fd, mode);
2574                 if (!output) {
2575                         perror("Failed opening logfd");
2576                         return -errno;
2577                 }
2578         }
2579
2580         if (stat_config.interval_clear && !isatty(fileno(output))) {
2581                 fprintf(stderr, "--interval-clear does not work with output\n");
2582                 parse_options_usage(stat_usage, stat_options, "o", 1);
2583                 parse_options_usage(NULL, stat_options, "log-fd", 0);
2584                 parse_options_usage(NULL, stat_options, "interval-clear", 0);
2585                 return -1;
2586         }
2587
2588         stat_config.output = output;
2589
2590         /*
2591          * let the spreadsheet do the pretty-printing
2592          */
2593         if (stat_config.csv_output) {
2594                 /* User explicitly passed -B? */
2595                 if (big_num_opt == 1) {
2596                         fprintf(stderr, "-B option not supported with -x\n");
2597                         parse_options_usage(stat_usage, stat_options, "B", 1);
2598                         parse_options_usage(NULL, stat_options, "x", 1);
2599                         goto out;
2600                 } else /* Nope, so disable big number formatting */
2601                         stat_config.big_num = false;
2602         } else if (big_num_opt == 0) /* User passed --no-big-num */
2603                 stat_config.big_num = false;
2604
2605         err = target__validate(&target);
2606         if (err) {
2607                 target__strerror(&target, err, errbuf, BUFSIZ);
2608                 pr_warning("%s\n", errbuf);
2609         }
2610
2611         setup_system_wide(argc);
2612
2613         /*
2614          * Display user/system times only for single
2615          * run and when there's specified tracee.
2616          */
2617         if ((stat_config.run_count == 1) && target__none(&target))
2618                 stat_config.ru_display = true;
2619
2620         if (stat_config.run_count < 0) {
2621                 pr_err("Run count must be a positive number\n");
2622                 parse_options_usage(stat_usage, stat_options, "r", 1);
2623                 goto out;
2624         } else if (stat_config.run_count == 0) {
2625                 forever = true;
2626                 stat_config.run_count = 1;
2627         }
2628
2629         if (stat_config.walltime_run_table) {
2630                 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0]));
2631                 if (!stat_config.walltime_run) {
2632                         pr_err("failed to setup -r option");
2633                         goto out;
2634                 }
2635         }
2636
2637         if ((stat_config.aggr_mode == AGGR_THREAD) &&
2638                 !target__has_task(&target)) {
2639                 if (!target.system_wide || target.cpu_list) {
2640                         fprintf(stderr, "The --per-thread option is only "
2641                                 "available when monitoring via -p -t -a "
2642                                 "options or only --per-thread.\n");
2643                         parse_options_usage(NULL, stat_options, "p", 1);
2644                         parse_options_usage(NULL, stat_options, "t", 1);
2645                         goto out;
2646                 }
2647         }
2648
2649         /*
2650          * no_aggr, cgroup are for system-wide only
2651          * --per-thread is aggregated per thread, we dont mix it with cpu mode
2652          */
2653         if (((stat_config.aggr_mode != AGGR_GLOBAL &&
2654               stat_config.aggr_mode != AGGR_THREAD) ||
2655              (nr_cgroups || stat_config.cgroup_list)) &&
2656             !target__has_cpu(&target)) {
2657                 fprintf(stderr, "both cgroup and no-aggregation "
2658                         "modes only available in system-wide mode\n");
2659
2660                 parse_options_usage(stat_usage, stat_options, "G", 1);
2661                 parse_options_usage(NULL, stat_options, "A", 1);
2662                 parse_options_usage(NULL, stat_options, "a", 1);
2663                 parse_options_usage(NULL, stat_options, "for-each-cgroup", 0);
2664                 goto out;
2665         }
2666
2667         if (stat_config.iostat_run) {
2668                 status = iostat_prepare(evsel_list, &stat_config);
2669                 if (status)
2670                         goto out;
2671                 if (iostat_mode == IOSTAT_LIST) {
2672                         iostat_list(evsel_list, &stat_config);
2673                         goto out;
2674                 } else if (verbose > 0)
2675                         iostat_list(evsel_list, &stat_config);
2676                 if (iostat_mode == IOSTAT_RUN && !target__has_cpu(&target))
2677                         target.system_wide = true;
2678         }
2679
2680         if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
2681                 target.per_thread = true;
2682
2683         stat_config.system_wide = target.system_wide;
2684         if (target.cpu_list) {
2685                 stat_config.user_requested_cpu_list = strdup(target.cpu_list);
2686                 if (!stat_config.user_requested_cpu_list) {
2687                         status = -ENOMEM;
2688                         goto out;
2689                 }
2690         }
2691
2692         /*
2693          * Metric parsing needs to be delayed as metrics may optimize events
2694          * knowing the target is system-wide.
2695          */
2696         if (metrics) {
2697                 const char *pmu = parse_events_option_args.pmu_filter ?: "all";
2698
2699                 metricgroup__parse_groups(evsel_list, pmu, metrics,
2700                                         stat_config.metric_no_group,
2701                                         stat_config.metric_no_merge,
2702                                         stat_config.metric_no_threshold,
2703                                         stat_config.user_requested_cpu_list,
2704                                         stat_config.system_wide,
2705                                         &stat_config.metric_events);
2706                 zfree(&metrics);
2707         }
2708
2709         if (add_default_attributes())
2710                 goto out;
2711
2712         if (stat_config.cgroup_list) {
2713                 if (nr_cgroups > 0) {
2714                         pr_err("--cgroup and --for-each-cgroup cannot be used together\n");
2715                         parse_options_usage(stat_usage, stat_options, "G", 1);
2716                         parse_options_usage(NULL, stat_options, "for-each-cgroup", 0);
2717                         goto out;
2718                 }
2719
2720                 if (evlist__expand_cgroup(evsel_list, stat_config.cgroup_list,
2721                                           &stat_config.metric_events, true) < 0) {
2722                         parse_options_usage(stat_usage, stat_options,
2723                                             "for-each-cgroup", 0);
2724                         goto out;
2725                 }
2726         }
2727
2728         evlist__warn_user_requested_cpus(evsel_list, target.cpu_list);
2729
2730         if (evlist__create_maps(evsel_list, &target) < 0) {
2731                 if (target__has_task(&target)) {
2732                         pr_err("Problems finding threads of monitor\n");
2733                         parse_options_usage(stat_usage, stat_options, "p", 1);
2734                         parse_options_usage(NULL, stat_options, "t", 1);
2735                 } else if (target__has_cpu(&target)) {
2736                         perror("failed to parse CPUs map");
2737                         parse_options_usage(stat_usage, stat_options, "C", 1);
2738                         parse_options_usage(NULL, stat_options, "a", 1);
2739                 }
2740                 goto out;
2741         }
2742
2743         evlist__check_cpu_maps(evsel_list);
2744
2745         /*
2746          * Initialize thread_map with comm names,
2747          * so we could print it out on output.
2748          */
2749         if (stat_config.aggr_mode == AGGR_THREAD) {
2750                 thread_map__read_comms(evsel_list->core.threads);
2751         }
2752
2753         if (stat_config.aggr_mode == AGGR_NODE)
2754                 cpu__setup_cpunode_map();
2755
2756         if (stat_config.times && interval)
2757                 interval_count = true;
2758         else if (stat_config.times && !interval) {
2759                 pr_err("interval-count option should be used together with "
2760                                 "interval-print.\n");
2761                 parse_options_usage(stat_usage, stat_options, "interval-count", 0);
2762                 parse_options_usage(stat_usage, stat_options, "I", 1);
2763                 goto out;
2764         }
2765
2766         if (timeout && timeout < 100) {
2767                 if (timeout < 10) {
2768                         pr_err("timeout must be >= 10ms.\n");
2769                         parse_options_usage(stat_usage, stat_options, "timeout", 0);
2770                         goto out;
2771                 } else
2772                         pr_warning("timeout < 100ms. "
2773                                    "The overhead percentage could be high in some cases. "
2774                                    "Please proceed with caution.\n");
2775         }
2776         if (timeout && interval) {
2777                 pr_err("timeout option is not supported with interval-print.\n");
2778                 parse_options_usage(stat_usage, stat_options, "timeout", 0);
2779                 parse_options_usage(stat_usage, stat_options, "I", 1);
2780                 goto out;
2781         }
2782
2783         if (perf_stat_init_aggr_mode())
2784                 goto out;
2785
2786         if (evlist__alloc_stats(&stat_config, evsel_list, interval))
2787                 goto out;
2788
2789         /*
2790          * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
2791          * while avoiding that older tools show confusing messages.
2792          *
2793          * However for pipe sessions we need to keep it zero,
2794          * because script's perf_evsel__check_attr is triggered
2795          * by attr->sample_type != 0, and we can't run it on
2796          * stat sessions.
2797          */
2798         stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe);
2799
2800         /*
2801          * We dont want to block the signals - that would cause
2802          * child tasks to inherit that and Ctrl-C would not work.
2803          * What we want is for Ctrl-C to work in the exec()-ed
2804          * task, but being ignored by perf stat itself:
2805          */
2806         atexit(sig_atexit);
2807         if (!forever)
2808                 signal(SIGINT,  skip_signal);
2809         signal(SIGCHLD, skip_signal);
2810         signal(SIGALRM, skip_signal);
2811         signal(SIGABRT, skip_signal);
2812
2813         if (evlist__initialize_ctlfd(evsel_list, stat_config.ctl_fd, stat_config.ctl_fd_ack))
2814                 goto out;
2815
2816         /* Enable ignoring missing threads when -p option is defined. */
2817         evlist__first(evsel_list)->ignore_missing_thread = target.pid;
2818         status = 0;
2819         for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) {
2820                 if (stat_config.run_count != 1 && verbose > 0)
2821                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
2822                                 run_idx + 1);
2823
2824                 if (run_idx != 0)
2825                         evlist__reset_prev_raw_counts(evsel_list);
2826
2827                 status = run_perf_stat(argc, argv, run_idx);
2828                 if (forever && status != -1 && !interval) {
2829                         print_counters(NULL, argc, argv);
2830                         perf_stat__reset_stats();
2831                 }
2832         }
2833
2834         if (!forever && status != -1 && (!interval || stat_config.summary)) {
2835                 if (stat_config.run_count > 1)
2836                         evlist__copy_res_stats(&stat_config, evsel_list);
2837                 print_counters(NULL, argc, argv);
2838         }
2839
2840         evlist__finalize_ctlfd(evsel_list);
2841
2842         if (STAT_RECORD) {
2843                 /*
2844                  * We synthesize the kernel mmap record just so that older tools
2845                  * don't emit warnings about not being able to resolve symbols
2846                  * due to /proc/sys/kernel/kptr_restrict settings and instead provide
2847                  * a saner message about no samples being in the perf.data file.
2848                  *
2849                  * This also serves to suppress a warning about f_header.data.size == 0
2850                  * in header.c at the moment 'perf stat record' gets introduced, which
2851                  * is not really needed once we start adding the stat specific PERF_RECORD_
2852                  * records, but the need to suppress the kptr_restrict messages in older
2853                  * tools remain  -acme
2854                  */
2855                 int fd = perf_data__fd(&perf_stat.data);
2856
2857                 err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
2858                                                          process_synthesized_event,
2859                                                          &perf_stat.session->machines.host);
2860                 if (err) {
2861                         pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
2862                                    "older tools may produce warnings about this file\n.");
2863                 }
2864
2865                 if (!interval) {
2866                         if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
2867                                 pr_err("failed to write stat round event\n");
2868                 }
2869
2870                 if (!perf_stat.data.is_pipe) {
2871                         perf_stat.session->header.data_size += perf_stat.bytes_written;
2872                         perf_session__write_header(perf_stat.session, evsel_list, fd, true);
2873                 }
2874
2875                 evlist__close(evsel_list);
2876                 perf_session__delete(perf_stat.session);
2877         }
2878
2879         perf_stat__exit_aggr_mode();
2880         evlist__free_stats(evsel_list);
2881 out:
2882         if (stat_config.iostat_run)
2883                 iostat_release(evsel_list);
2884
2885         zfree(&stat_config.walltime_run);
2886         zfree(&stat_config.user_requested_cpu_list);
2887
2888         if (smi_cost && smi_reset)
2889                 sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
2890
2891         evlist__delete(evsel_list);
2892
2893         metricgroup__rblist_exit(&stat_config.metric_events);
2894         evlist__close_control(stat_config.ctl_fd, stat_config.ctl_fd_ack, &stat_config.ctl_fd_close);
2895
2896         return status;
2897 }