tools/perf/builtin-stat.c

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