tools/perf/builtin-stat.c

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