tools/perf/builtin-stat.c

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