tools/perf/builtin-stat.c

   1 /*
   2  * builtin-stat.c
   3  *
   4  * Builtin stat command: Give a precise performance counters summary
   5  * overview about any workload, CPU or specific PID.
   6  *
   7  * Sample output:
   8
   9    $ perf stat ./hackbench 10
  10
  11   Time: 0.118
  12
  13   Performance counter stats for './hackbench 10':
  14
  15        1708.761321 task-clock                #   11.037 CPUs utilized
  16             41,190 context-switches          #    0.024 M/sec
  17              6,735 CPU-migrations            #    0.004 M/sec
  18             17,318 page-faults               #    0.010 M/sec
  19      5,205,202,243 cycles                    #    3.046 GHz
  20      3,856,436,920 stalled-cycles-frontend   #   74.09% frontend cycles idle
  21      1,600,790,871 stalled-cycles-backend    #   30.75% backend  cycles idle
  22      2,603,501,247 instructions              #    0.50  insns per cycle
  23                                              #    1.48  stalled cycles per insn
  24        484,357,498 branches                  #  283.455 M/sec
  25          6,388,934 branch-misses             #    1.32% of all branches
  26
  27         0.154822978  seconds time elapsed
  28
  29  *
  30  * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
  31  *
  32  * Improvements and fixes by:
  33  *
  34  *   Arjan van de Ven <arjan@linux.intel.com>
  35  *   Yanmin Zhang <yanmin.zhang@intel.com>
  36  *   Wu Fengguang <fengguang.wu@intel.com>
  37  *   Mike Galbraith <efault@gmx.de>
  38  *   Paul Mackerras <paulus@samba.org>
  39  *   Jaswinder Singh Rajput <jaswinder@kernel.org>
  40  *
  41  * Released under the GPL v2. (and only v2, not any later version)
  42  */
  43
  44 #include "perf.h"
  45 #include "builtin.h"
  46 #include "util/cgroup.h"
  47 #include "util/util.h"
  48 #include <subcmd/parse-options.h>
  49 #include "util/parse-events.h"
  50 #include "util/pmu.h"
  51 #include "util/event.h"
  52 #include "util/evlist.h"
  53 #include "util/evsel.h"
  54 #include "util/debug.h"
  55 #include "util/drv_configs.h"
  56 #include "util/color.h"
  57 #include "util/stat.h"
  58 #include "util/header.h"
  59 #include "util/cpumap.h"
  60 #include "util/thread.h"
  61 #include "util/thread_map.h"
  62 #include "util/counts.h"
  63 #include "util/group.h"
  64 #include "util/session.h"
  65 #include "util/tool.h"
  66 #include "util/group.h"
  67 #include "util/string2.h"
  68 #include "util/metricgroup.h"
  69 #include "asm/bug.h"
  70
  71 #include <linux/time64.h>
  72 #include <api/fs/fs.h>
  73 #include <errno.h>
  74 #include <signal.h>
  75 #include <stdlib.h>
  76 #include <sys/prctl.h>
  77 #include <inttypes.h>
  78 #include <locale.h>
  79 #include <math.h>
  80 #include <sys/types.h>
  81 #include <sys/stat.h>
  82 #include <sys/wait.h>
  83 #include <unistd.h>
  84
  85 #include "sane_ctype.h"
  86
  87 #define DEFAULT_SEPARATOR       " "
  88 #define CNTR_NOT_SUPPORTED      "<not supported>"
  89 #define CNTR_NOT_COUNTED        "<not counted>"
  90 #define FREEZE_ON_SMI_PATH      "devices/cpu/freeze_on_smi"
  91
  92 static void print_counters(struct timespec *ts, int argc, const char **argv);
  93
  94 /* Default events used for perf stat -T */
  95 static const char *transaction_attrs = {
  96         "task-clock,"
  97         "{"
  98         "instructions,"
  99         "cycles,"
 100         "cpu/cycles-t/,"
 101         "cpu/tx-start/,"
 102         "cpu/el-start/,"
 103         "cpu/cycles-ct/"
 104         "}"
 105 };
 106
 107 /* More limited version when the CPU does not have all events. */
 108 static const char * transaction_limited_attrs = {
 109         "task-clock,"
 110         "{"
 111         "instructions,"
 112         "cycles,"
 113         "cpu/cycles-t/,"
 114         "cpu/tx-start/"
 115         "}"
 116 };
 117
 118 static const char * topdown_attrs[] = {
 119         "topdown-total-slots",
 120         "topdown-slots-retired",
 121         "topdown-recovery-bubbles",
 122         "topdown-fetch-bubbles",
 123         "topdown-slots-issued",
 124         NULL,
 125 };
 126
 127 static const char *smi_cost_attrs = {
 128         "{"
 129         "msr/aperf/,"
 130         "msr/smi/,"
 131         "cycles"
 132         "}"
 133 };
 134
 135 static struct perf_evlist       *evsel_list;
 136
 137 static struct rblist             metric_events;
 138
 139 static struct target target = {
 140         .uid    = UINT_MAX,
 141 };
 142
 143 typedef int (*aggr_get_id_t)(struct cpu_map *m, int cpu);
 144
 145 static int                      run_count                       =  1;
 146 static bool                     no_inherit                      = false;
 147 static volatile pid_t           child_pid                       = -1;
 148 static bool                     null_run                        =  false;
 149 static int                      detailed_run                    =  0;
 150 static bool                     transaction_run;
 151 static bool                     topdown_run                     = false;
 152 static bool                     smi_cost                        = false;
 153 static bool                     smi_reset                       = false;
 154 static bool                     big_num                         =  true;
 155 static int                      big_num_opt                     =  -1;
 156 static const char               *csv_sep                        = NULL;
 157 static bool                     csv_output                      = false;
 158 static bool                     group                           = false;
 159 static const char               *pre_cmd                        = NULL;
 160 static const char               *post_cmd                       = NULL;
 161 static bool                     sync_run                        = false;
 162 static unsigned int             initial_delay                   = 0;
 163 static unsigned int             unit_width                      = 4; /* strlen("unit") */
 164 static bool                     forever                         = false;
 165 static bool                     metric_only                     = false;
 166 static bool                     force_metric_only               = false;
 167 static bool                     no_merge                        = false;
 168 static struct timespec          ref_time;
 169 static struct cpu_map           *aggr_map;
 170 static aggr_get_id_t            aggr_get_id;
 171 static bool                     append_file;
 172 static const char               *output_name;
 173 static int                      output_fd;
 174 static int                      print_free_counters_hint;
 175
 176 struct perf_stat {
 177         bool                     record;
 178         struct perf_data_file    file;
 179         struct perf_session     *session;
 180         u64                      bytes_written;
 181         struct perf_tool         tool;
 182         bool                     maps_allocated;
 183         struct cpu_map          *cpus;
 184         struct thread_map       *threads;
 185         enum aggr_mode           aggr_mode;
 186 };
 187
 188 static struct perf_stat         perf_stat;
 189 #define STAT_RECORD             perf_stat.record
 190
 191 static volatile int done = 0;
 192
 193 static struct perf_stat_config stat_config = {
 194         .aggr_mode      = AGGR_GLOBAL,
 195         .scale          = true,
 196 };
 197
 198 static bool is_duration_time(struct perf_evsel *evsel)
 199 {
 200         return !strcmp(evsel->name, "duration_time");
 201 }
 202
 203 static inline void diff_timespec(struct timespec *r, struct timespec *a,
 204                                  struct timespec *b)
 205 {
 206         r->tv_sec = a->tv_sec - b->tv_sec;
 207         if (a->tv_nsec < b->tv_nsec) {
 208                 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
 209                 r->tv_sec--;
 210         } else {
 211                 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
 212         }
 213 }
 214
 215 static void perf_stat__reset_stats(void)
 216 {
 217         perf_evlist__reset_stats(evsel_list);
 218         perf_stat__reset_shadow_stats();
 219 }
 220
 221 static int create_perf_stat_counter(struct perf_evsel *evsel)
 222 {
 223         struct perf_event_attr *attr = &evsel->attr;
 224         struct perf_evsel *leader = evsel->leader;
 225
 226         if (stat_config.scale) {
 227                 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
 228                                     PERF_FORMAT_TOTAL_TIME_RUNNING;
 229         }
 230
 231         /*
 232          * The event is part of non trivial group, let's enable
 233          * the group read (for leader) and ID retrieval for all
 234          * members.
 235          */
 236         if (leader->nr_members > 1)
 237                 attr->read_format |= PERF_FORMAT_ID|PERF_FORMAT_GROUP;
 238
 239         attr->inherit = !no_inherit;
 240
 241         /*
 242          * Some events get initialized with sample_(period/type) set,
 243          * like tracepoints. Clear it up for counting.
 244          */
 245         attr->sample_period = 0;
 246
 247         /*
 248          * But set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
 249          * while avoiding that older tools show confusing messages.
 250          *
 251          * However for pipe sessions we need to keep it zero,
 252          * because script's perf_evsel__check_attr is triggered
 253          * by attr->sample_type != 0, and we can't run it on
 254          * stat sessions.
 255          */
 256         if (!(STAT_RECORD && perf_stat.file.is_pipe))
 257                 attr->sample_type = PERF_SAMPLE_IDENTIFIER;
 258
 259         /*
 260          * Disabling all counters initially, they will be enabled
 261          * either manually by us or by kernel via enable_on_exec
 262          * set later.
 263          */
 264         if (perf_evsel__is_group_leader(evsel)) {
 265                 attr->disabled = 1;
 266
 267                 /*
 268                  * In case of initial_delay we enable tracee
 269                  * events manually.
 270                  */
 271                 if (target__none(&target) && !initial_delay)
 272                         attr->enable_on_exec = 1;
 273         }
 274
 275         if (target__has_cpu(&target))
 276                 return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
 277
 278         return perf_evsel__open_per_thread(evsel, evsel_list->threads);
 279 }
 280
 281 /*
 282  * Does the counter have nsecs as a unit?
 283  */
 284 static inline int nsec_counter(struct perf_evsel *evsel)
 285 {
 286         if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
 287             perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 288                 return 1;
 289
 290         return 0;
 291 }
 292
 293 static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
 294                                      union perf_event *event,
 295                                      struct perf_sample *sample __maybe_unused,
 296                                      struct machine *machine __maybe_unused)
 297 {
 298         if (perf_data_file__write(&perf_stat.file, event, event->header.size) < 0) {
 299                 pr_err("failed to write perf data, error: %m\n");
 300                 return -1;
 301         }
 302
 303         perf_stat.bytes_written += event->header.size;
 304         return 0;
 305 }
 306
 307 static int write_stat_round_event(u64 tm, u64 type)
 308 {
 309         return perf_event__synthesize_stat_round(NULL, tm, type,
 310                                                  process_synthesized_event,
 311                                                  NULL);
 312 }
 313
 314 #define WRITE_STAT_ROUND_EVENT(time, interval) \
 315         write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
 316
 317 #define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
 318
 319 static int
 320 perf_evsel__write_stat_event(struct perf_evsel *counter, u32 cpu, u32 thread,
 321                              struct perf_counts_values *count)
 322 {
 323         struct perf_sample_id *sid = SID(counter, cpu, thread);
 324
 325         return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
 326                                            process_synthesized_event, NULL);
 327 }
 328
 329 /*
 330  * Read out the results of a single counter:
 331  * do not aggregate counts across CPUs in system-wide mode
 332  */
 333 static int read_counter(struct perf_evsel *counter)
 334 {
 335         int nthreads = thread_map__nr(evsel_list->threads);
 336         int ncpus, cpu, thread;
 337
 338         if (target__has_cpu(&target))
 339                 ncpus = perf_evsel__nr_cpus(counter);
 340         else
 341                 ncpus = 1;
 342
 343         if (!counter->supported)
 344                 return -ENOENT;
 345
 346         if (counter->system_wide)
 347                 nthreads = 1;
 348
 349         for (thread = 0; thread < nthreads; thread++) {
 350                 for (cpu = 0; cpu < ncpus; cpu++) {
 351                         struct perf_counts_values *count;
 352
 353                         count = perf_counts(counter->counts, cpu, thread);
 354
 355                         /*
 356                          * The leader's group read loads data into its group members
 357                          * (via perf_evsel__read_counter) and sets threir count->loaded.
 358                          */
 359                         if (!count->loaded &&
 360                             perf_evsel__read_counter(counter, cpu, thread)) {
 361                                 counter->counts->scaled = -1;
 362                                 perf_counts(counter->counts, cpu, thread)->ena = 0;
 363                                 perf_counts(counter->counts, cpu, thread)->run = 0;
 364                                 return -1;
 365                         }
 366
 367                         count->loaded = false;
 368
 369                         if (STAT_RECORD) {
 370                                 if (perf_evsel__write_stat_event(counter, cpu, thread, count)) {
 371                                         pr_err("failed to write stat event\n");
 372                                         return -1;
 373                                 }
 374                         }
 375
 376                         if (verbose > 1) {
 377                                 fprintf(stat_config.output,
 378                                         "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 379                                                 perf_evsel__name(counter),
 380                                                 cpu,
 381                                                 count->val, count->ena, count->run);
 382                         }
 383                 }
 384         }
 385
 386         return 0;
 387 }
 388
 389 static void read_counters(void)
 390 {
 391         struct perf_evsel *counter;
 392         int ret;
 393
 394         evlist__for_each_entry(evsel_list, counter) {
 395                 ret = read_counter(counter);
 396                 if (ret)
 397                         pr_debug("failed to read counter %s\n", counter->name);
 398
 399                 if (ret == 0 && perf_stat_process_counter(&stat_config, counter))
 400                         pr_warning("failed to process counter %s\n", counter->name);
 401         }
 402 }
 403
 404 static void process_interval(void)
 405 {
 406         struct timespec ts, rs;
 407
 408         read_counters();
 409
 410         clock_gettime(CLOCK_MONOTONIC, &ts);
 411         diff_timespec(&rs, &ts, &ref_time);
 412
 413         if (STAT_RECORD) {
 414                 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
 415                         pr_err("failed to write stat round event\n");
 416         }
 417
 418         print_counters(&rs, 0, NULL);
 419 }
 420
 421 static void enable_counters(void)
 422 {
 423         if (initial_delay)
 424                 usleep(initial_delay * USEC_PER_MSEC);
 425
 426         /*
 427          * We need to enable counters only if:
 428          * - we don't have tracee (attaching to task or cpu)
 429          * - we have initial delay configured
 430          */
 431         if (!target__none(&target) || initial_delay)
 432                 perf_evlist__enable(evsel_list);
 433 }
 434
 435 static void disable_counters(void)
 436 {
 437         /*
 438          * If we don't have tracee (attaching to task or cpu), counters may
 439          * still be running. To get accurate group ratios, we must stop groups
 440          * from counting before reading their constituent counters.
 441          */
 442         if (!target__none(&target))
 443                 perf_evlist__disable(evsel_list);
 444 }
 445
 446 static volatile int workload_exec_errno;
 447
 448 /*
 449  * perf_evlist__prepare_workload will send a SIGUSR1
 450  * if the fork fails, since we asked by setting its
 451  * want_signal to true.
 452  */
 453 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
 454                                         void *ucontext __maybe_unused)
 455 {
 456         workload_exec_errno = info->si_value.sival_int;
 457 }
 458
 459 static bool has_unit(struct perf_evsel *counter)
 460 {
 461         return counter->unit && *counter->unit;
 462 }
 463
 464 static bool has_scale(struct perf_evsel *counter)
 465 {
 466         return counter->scale != 1;
 467 }
 468
 469 static int perf_stat_synthesize_config(bool is_pipe)
 470 {
 471         struct perf_evsel *counter;
 472         int err;
 473
 474         if (is_pipe) {
 475                 err = perf_event__synthesize_attrs(NULL, perf_stat.session,
 476                                                    process_synthesized_event);
 477                 if (err < 0) {
 478                         pr_err("Couldn't synthesize attrs.\n");
 479                         return err;
 480                 }
 481         }
 482
 483         /*
 484          * Synthesize other events stuff not carried within
 485          * attr event - unit, scale, name
 486          */
 487         evlist__for_each_entry(evsel_list, counter) {
 488                 if (!counter->supported)
 489                         continue;
 490
 491                 /*
 492                  * Synthesize unit and scale only if it's defined.
 493                  */
 494                 if (has_unit(counter)) {
 495                         err = perf_event__synthesize_event_update_unit(NULL, counter, process_synthesized_event);
 496                         if (err < 0) {
 497                                 pr_err("Couldn't synthesize evsel unit.\n");
 498                                 return err;
 499                         }
 500                 }
 501
 502                 if (has_scale(counter)) {
 503                         err = perf_event__synthesize_event_update_scale(NULL, counter, process_synthesized_event);
 504                         if (err < 0) {
 505                                 pr_err("Couldn't synthesize evsel scale.\n");
 506                                 return err;
 507                         }
 508                 }
 509
 510                 if (counter->own_cpus) {
 511                         err = perf_event__synthesize_event_update_cpus(NULL, counter, process_synthesized_event);
 512                         if (err < 0) {
 513                                 pr_err("Couldn't synthesize evsel scale.\n");
 514                                 return err;
 515                         }
 516                 }
 517
 518                 /*
 519                  * Name is needed only for pipe output,
 520                  * perf.data carries event names.
 521                  */
 522                 if (is_pipe) {
 523                         err = perf_event__synthesize_event_update_name(NULL, counter, process_synthesized_event);
 524                         if (err < 0) {
 525                                 pr_err("Couldn't synthesize evsel name.\n");
 526                                 return err;
 527                         }
 528                 }
 529         }
 530
 531         err = perf_event__synthesize_thread_map2(NULL, evsel_list->threads,
 532                                                 process_synthesized_event,
 533                                                 NULL);
 534         if (err < 0) {
 535                 pr_err("Couldn't synthesize thread map.\n");
 536                 return err;
 537         }
 538
 539         err = perf_event__synthesize_cpu_map(NULL, evsel_list->cpus,
 540                                              process_synthesized_event, NULL);
 541         if (err < 0) {
 542                 pr_err("Couldn't synthesize thread map.\n");
 543                 return err;
 544         }
 545
 546         err = perf_event__synthesize_stat_config(NULL, &stat_config,
 547                                                  process_synthesized_event, NULL);
 548         if (err < 0) {
 549                 pr_err("Couldn't synthesize config.\n");
 550                 return err;
 551         }
 552
 553         return 0;
 554 }
 555
 556 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
 557
 558 static int __store_counter_ids(struct perf_evsel *counter,
 559                                struct cpu_map *cpus,
 560                                struct thread_map *threads)
 561 {
 562         int cpu, thread;
 563
 564         for (cpu = 0; cpu < cpus->nr; cpu++) {
 565                 for (thread = 0; thread < threads->nr; thread++) {
 566                         int fd = FD(counter, cpu, thread);
 567
 568                         if (perf_evlist__id_add_fd(evsel_list, counter,
 569                                                    cpu, thread, fd) < 0)
 570                                 return -1;
 571                 }
 572         }
 573
 574         return 0;
 575 }
 576
 577 static int store_counter_ids(struct perf_evsel *counter)
 578 {
 579         struct cpu_map *cpus = counter->cpus;
 580         struct thread_map *threads = counter->threads;
 581
 582         if (perf_evsel__alloc_id(counter, cpus->nr, threads->nr))
 583                 return -ENOMEM;
 584
 585         return __store_counter_ids(counter, cpus, threads);
 586 }
 587
 588 static bool perf_evsel__should_store_id(struct perf_evsel *counter)
 589 {
 590         return STAT_RECORD || counter->attr.read_format & PERF_FORMAT_ID;
 591 }
 592
 593 static struct perf_evsel *perf_evsel__reset_weak_group(struct perf_evsel *evsel)
 594 {
 595         struct perf_evsel *c2, *leader;
 596         bool is_open = true;
 597
 598         leader = evsel->leader;
 599         pr_debug("Weak group for %s/%d failed\n",
 600                         leader->name, leader->nr_members);
 601
 602         /*
 603          * for_each_group_member doesn't work here because it doesn't
 604          * include the first entry.
 605          */
 606         evlist__for_each_entry(evsel_list, c2) {
 607                 if (c2 == evsel)
 608                         is_open = false;
 609                 if (c2->leader == leader) {
 610                         if (is_open)
 611                                 perf_evsel__close(c2);
 612                         c2->leader = c2;
 613                         c2->nr_members = 0;
 614                 }
 615         }
 616         return leader;
 617 }
 618
 619 static int __run_perf_stat(int argc, const char **argv)
 620 {
 621         int interval = stat_config.interval;
 622         char msg[BUFSIZ];
 623         unsigned long long t0, t1;
 624         struct perf_evsel *counter;
 625         struct timespec ts;
 626         size_t l;
 627         int status = 0;
 628         const bool forks = (argc > 0);
 629         bool is_pipe = STAT_RECORD ? perf_stat.file.is_pipe : false;
 630         struct perf_evsel_config_term *err_term;
 631
 632         if (interval) {
 633                 ts.tv_sec  = interval / USEC_PER_MSEC;
 634                 ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC;
 635         } else {
 636                 ts.tv_sec  = 1;
 637                 ts.tv_nsec = 0;
 638         }
 639
 640         if (forks) {
 641                 if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe,
 642                                                   workload_exec_failed_signal) < 0) {
 643                         perror("failed to prepare workload");
 644                         return -1;
 645                 }
 646                 child_pid = evsel_list->workload.pid;
 647         }
 648
 649         if (group)
 650                 perf_evlist__set_leader(evsel_list);
 651
 652         evlist__for_each_entry(evsel_list, counter) {
 653 try_again:
 654                 if (create_perf_stat_counter(counter) < 0) {
 655
 656                         /* Weak group failed. Reset the group. */
 657                         if (errno == EINVAL &&
 658                             counter->leader != counter &&
 659                             counter->weak_group) {
 660                                 counter = perf_evsel__reset_weak_group(counter);
 661                                 goto try_again;
 662                         }
 663
 664                         /*
 665                          * PPC returns ENXIO for HW counters until 2.6.37
 666                          * (behavior changed with commit b0a873e).
 667                          */
 668                         if (errno == EINVAL || errno == ENOSYS ||
 669                             errno == ENOENT || errno == EOPNOTSUPP ||
 670                             errno == ENXIO) {
 671                                 if (verbose > 0)
 672                                         ui__warning("%s event is not supported by the kernel.\n",
 673                                                     perf_evsel__name(counter));
 674                                 counter->supported = false;
 675
 676                                 if ((counter->leader != counter) ||
 677                                     !(counter->leader->nr_members > 1))
 678                                         continue;
 679                         } else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
 680                                 if (verbose > 0)
 681                                         ui__warning("%s\n", msg);
 682                                 goto try_again;
 683                         }
 684
 685                         perf_evsel__open_strerror(counter, &target,
 686                                                   errno, msg, sizeof(msg));
 687                         ui__error("%s\n", msg);
 688
 689                         if (child_pid != -1)
 690                                 kill(child_pid, SIGTERM);
 691
 692                         return -1;
 693                 }
 694                 counter->supported = true;
 695
 696                 l = strlen(counter->unit);
 697                 if (l > unit_width)
 698                         unit_width = l;
 699
 700                 if (perf_evsel__should_store_id(counter) &&
 701                     store_counter_ids(counter))
 702                         return -1;
 703         }
 704
 705         if (perf_evlist__apply_filters(evsel_list, &counter)) {
 706                 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
 707                         counter->filter, perf_evsel__name(counter), errno,
 708                         str_error_r(errno, msg, sizeof(msg)));
 709                 return -1;
 710         }
 711
 712         if (perf_evlist__apply_drv_configs(evsel_list, &counter, &err_term)) {
 713                 pr_err("failed to set config \"%s\" on event %s with %d (%s)\n",
 714                       err_term->val.drv_cfg, perf_evsel__name(counter), errno,
 715                       str_error_r(errno, msg, sizeof(msg)));
 716                 return -1;
 717         }
 718
 719         if (STAT_RECORD) {
 720                 int err, fd = perf_data_file__fd(&perf_stat.file);
 721
 722                 if (is_pipe) {
 723                         err = perf_header__write_pipe(perf_data_file__fd(&perf_stat.file));
 724                 } else {
 725                         err = perf_session__write_header(perf_stat.session, evsel_list,
 726                                                          fd, false);
 727                 }
 728
 729                 if (err < 0)
 730                         return err;
 731
 732                 err = perf_stat_synthesize_config(is_pipe);
 733                 if (err < 0)
 734                         return err;
 735         }
 736
 737         /*
 738          * Enable counters and exec the command:
 739          */
 740         t0 = rdclock();
 741         clock_gettime(CLOCK_MONOTONIC, &ref_time);
 742
 743         if (forks) {
 744                 perf_evlist__start_workload(evsel_list);
 745                 enable_counters();
 746
 747                 if (interval) {
 748                         while (!waitpid(child_pid, &status, WNOHANG)) {
 749                                 nanosleep(&ts, NULL);
 750                                 process_interval();
 751                         }
 752                 }
 753                 waitpid(child_pid, &status, 0);
 754
 755                 if (workload_exec_errno) {
 756                         const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
 757                         pr_err("Workload failed: %s\n", emsg);
 758                         return -1;
 759                 }
 760
 761                 if (WIFSIGNALED(status))
 762                         psignal(WTERMSIG(status), argv[0]);
 763         } else {
 764                 enable_counters();
 765                 while (!done) {
 766                         nanosleep(&ts, NULL);
 767                         if (interval)
 768                                 process_interval();
 769                 }
 770         }
 771
 772         disable_counters();
 773
 774         t1 = rdclock();
 775
 776         update_stats(&walltime_nsecs_stats, t1 - t0);
 777
 778         /*
 779          * Closing a group leader splits the group, and as we only disable
 780          * group leaders, results in remaining events becoming enabled. To
 781          * avoid arbitrary skew, we must read all counters before closing any
 782          * group leaders.
 783          */
 784         read_counters();
 785         perf_evlist__close(evsel_list);
 786
 787         return WEXITSTATUS(status);
 788 }
 789
 790 static int run_perf_stat(int argc, const char **argv)
 791 {
 792         int ret;
 793
 794         if (pre_cmd) {
 795                 ret = system(pre_cmd);
 796                 if (ret)
 797                         return ret;
 798         }
 799
 800         if (sync_run)
 801                 sync();
 802
 803         ret = __run_perf_stat(argc, argv);
 804         if (ret)
 805                 return ret;
 806
 807         if (post_cmd) {
 808                 ret = system(post_cmd);
 809                 if (ret)
 810                         return ret;
 811         }
 812
 813         return ret;
 814 }
 815
 816 static void print_running(u64 run, u64 ena)
 817 {
 818         if (csv_output) {
 819                 fprintf(stat_config.output, "%s%" PRIu64 "%s%.2f",
 820                                         csv_sep,
 821                                         run,
 822                                         csv_sep,
 823                                         ena ? 100.0 * run / ena : 100.0);
 824         } else if (run != ena) {
 825                 fprintf(stat_config.output, "  (%.2f%%)", 100.0 * run / ena);
 826         }
 827 }
 828
 829 static void print_noise_pct(double total, double avg)
 830 {
 831         double pct = rel_stddev_stats(total, avg);
 832
 833         if (csv_output)
 834                 fprintf(stat_config.output, "%s%.2f%%", csv_sep, pct);
 835         else if (pct)
 836                 fprintf(stat_config.output, "  ( +-%6.2f%% )", pct);
 837 }
 838
 839 static void print_noise(struct perf_evsel *evsel, double avg)
 840 {
 841         struct perf_stat_evsel *ps;
 842
 843         if (run_count == 1)
 844                 return;
 845
 846         ps = evsel->priv;
 847         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
 848 }
 849
 850 static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
 851 {
 852         switch (stat_config.aggr_mode) {
 853         case AGGR_CORE:
 854                 fprintf(stat_config.output, "S%d-C%*d%s%*d%s",
 855                         cpu_map__id_to_socket(id),
 856                         csv_output ? 0 : -8,
 857                         cpu_map__id_to_cpu(id),
 858                         csv_sep,
 859                         csv_output ? 0 : 4,
 860                         nr,
 861                         csv_sep);
 862                 break;
 863         case AGGR_SOCKET:
 864                 fprintf(stat_config.output, "S%*d%s%*d%s",
 865                         csv_output ? 0 : -5,
 866                         id,
 867                         csv_sep,
 868                         csv_output ? 0 : 4,
 869                         nr,
 870                         csv_sep);
 871                         break;
 872         case AGGR_NONE:
 873                 fprintf(stat_config.output, "CPU%*d%s",
 874                         csv_output ? 0 : -4,
 875                         perf_evsel__cpus(evsel)->map[id], csv_sep);
 876                 break;
 877         case AGGR_THREAD:
 878                 fprintf(stat_config.output, "%*s-%*d%s",
 879                         csv_output ? 0 : 16,
 880                         thread_map__comm(evsel->threads, id),
 881                         csv_output ? 0 : -8,
 882                         thread_map__pid(evsel->threads, id),
 883                         csv_sep);
 884                 break;
 885         case AGGR_GLOBAL:
 886         case AGGR_UNSET:
 887         default:
 888                 break;
 889         }
 890 }
 891
 892 struct outstate {
 893         FILE *fh;
 894         bool newline;
 895         const char *prefix;
 896         int  nfields;
 897         int  id, nr;
 898         struct perf_evsel *evsel;
 899 };
 900
 901 #define METRIC_LEN  35
 902
 903 static void new_line_std(void *ctx)
 904 {
 905         struct outstate *os = ctx;
 906
 907         os->newline = true;
 908 }
 909
 910 static void do_new_line_std(struct outstate *os)
 911 {
 912         fputc('\n', os->fh);
 913         fputs(os->prefix, os->fh);
 914         aggr_printout(os->evsel, os->id, os->nr);
 915         if (stat_config.aggr_mode == AGGR_NONE)
 916                 fprintf(os->fh, "        ");
 917         fprintf(os->fh, "                                                 ");
 918 }
 919
 920 static void print_metric_std(void *ctx, const char *color, const char *fmt,
 921                              const char *unit, double val)
 922 {
 923         struct outstate *os = ctx;
 924         FILE *out = os->fh;
 925         int n;
 926         bool newline = os->newline;
 927
 928         os->newline = false;
 929
 930         if (unit == NULL || fmt == NULL) {
 931                 fprintf(out, "%-*s", METRIC_LEN, "");
 932                 return;
 933         }
 934
 935         if (newline)
 936                 do_new_line_std(os);
 937
 938         n = fprintf(out, " # ");
 939         if (color)
 940                 n += color_fprintf(out, color, fmt, val);
 941         else
 942                 n += fprintf(out, fmt, val);
 943         fprintf(out, " %-*s", METRIC_LEN - n - 1, unit);
 944 }
 945
 946 static void new_line_csv(void *ctx)
 947 {
 948         struct outstate *os = ctx;
 949         int i;
 950
 951         fputc('\n', os->fh);
 952         if (os->prefix)
 953                 fprintf(os->fh, "%s%s", os->prefix, csv_sep);
 954         aggr_printout(os->evsel, os->id, os->nr);
 955         for (i = 0; i < os->nfields; i++)
 956                 fputs(csv_sep, os->fh);
 957 }
 958
 959 static void print_metric_csv(void *ctx,
 960                              const char *color __maybe_unused,
 961                              const char *fmt, const char *unit, double val)
 962 {
 963         struct outstate *os = ctx;
 964         FILE *out = os->fh;
 965         char buf[64], *vals, *ends;
 966
 967         if (unit == NULL || fmt == NULL) {
 968                 fprintf(out, "%s%s%s%s", csv_sep, csv_sep, csv_sep, csv_sep);
 969                 return;
 970         }
 971         snprintf(buf, sizeof(buf), fmt, val);
 972         ends = vals = ltrim(buf);
 973         while (isdigit(*ends) || *ends == '.')
 974                 ends++;
 975         *ends = 0;
 976         while (isspace(*unit))
 977                 unit++;
 978         fprintf(out, "%s%s%s%s", csv_sep, vals, csv_sep, unit);
 979 }
 980
 981 #define METRIC_ONLY_LEN 20
 982
 983 /* Filter out some columns that don't work well in metrics only mode */
 984
 985 static bool valid_only_metric(const char *unit)
 986 {
 987         if (!unit)
 988                 return false;
 989         if (strstr(unit, "/sec") ||
 990             strstr(unit, "hz") ||
 991             strstr(unit, "Hz") ||
 992             strstr(unit, "CPUs utilized"))
 993                 return false;
 994         return true;
 995 }
 996
 997 static const char *fixunit(char *buf, struct perf_evsel *evsel,
 998                            const char *unit)
 999 {
1000         if (!strncmp(unit, "of all", 6)) {
1001                 snprintf(buf, 1024, "%s %s", perf_evsel__name(evsel),
1002                          unit);
1003                 return buf;
1004         }
1005         return unit;
1006 }
1007
1008 static void print_metric_only(void *ctx, const char *color, const char *fmt,
1009                               const char *unit, double val)
1010 {
1011         struct outstate *os = ctx;
1012         FILE *out = os->fh;
1013         int n;
1014         char buf[1024];
1015         unsigned mlen = METRIC_ONLY_LEN;
1016
1017         if (!valid_only_metric(unit))
1018                 return;
1019         unit = fixunit(buf, os->evsel, unit);
1020         if (color)
1021                 n = color_fprintf(out, color, fmt, val);
1022         else
1023                 n = fprintf(out, fmt, val);
1024         if (n > METRIC_ONLY_LEN)
1025                 n = METRIC_ONLY_LEN;
1026         if (mlen < strlen(unit))
1027                 mlen = strlen(unit) + 1;
1028         fprintf(out, "%*s", mlen - n, "");
1029 }
1030
1031 static void print_metric_only_csv(void *ctx, const char *color __maybe_unused,
1032                                   const char *fmt,
1033                                   const char *unit, double val)
1034 {
1035         struct outstate *os = ctx;
1036         FILE *out = os->fh;
1037         char buf[64], *vals, *ends;
1038         char tbuf[1024];
1039
1040         if (!valid_only_metric(unit))
1041                 return;
1042         unit = fixunit(tbuf, os->evsel, unit);
1043         snprintf(buf, sizeof buf, fmt, val);
1044         ends = vals = ltrim(buf);
1045         while (isdigit(*ends) || *ends == '.')
1046                 ends++;
1047         *ends = 0;
1048         fprintf(out, "%s%s", vals, csv_sep);
1049 }
1050
1051 static void new_line_metric(void *ctx __maybe_unused)
1052 {
1053 }
1054
1055 static void print_metric_header(void *ctx, const char *color __maybe_unused,
1056                                 const char *fmt __maybe_unused,
1057                                 const char *unit, double val __maybe_unused)
1058 {
1059         struct outstate *os = ctx;
1060         char tbuf[1024];
1061
1062         if (!valid_only_metric(unit))
1063                 return;
1064         unit = fixunit(tbuf, os->evsel, unit);
1065         if (csv_output)
1066                 fprintf(os->fh, "%s%s", unit, csv_sep);
1067         else
1068                 fprintf(os->fh, "%-*s ", METRIC_ONLY_LEN, unit);
1069 }
1070
1071 static void nsec_printout(int id, int nr, struct perf_evsel *evsel, double avg)
1072 {
1073         FILE *output = stat_config.output;
1074         double msecs = avg / NSEC_PER_MSEC;
1075         const char *fmt_v, *fmt_n;
1076         char name[25];
1077
1078         fmt_v = csv_output ? "%.6f%s" : "%18.6f%s";
1079         fmt_n = csv_output ? "%s" : "%-25s";
1080
1081         aggr_printout(evsel, id, nr);
1082
1083         scnprintf(name, sizeof(name), "%s%s",
1084                   perf_evsel__name(evsel), csv_output ? "" : " (msec)");
1085
1086         fprintf(output, fmt_v, msecs, csv_sep);
1087
1088         if (csv_output)
1089                 fprintf(output, "%s%s", evsel->unit, csv_sep);
1090         else
1091                 fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep);
1092
1093         fprintf(output, fmt_n, name);
1094
1095         if (evsel->cgrp)
1096                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
1097 }
1098
1099 static int first_shadow_cpu(struct perf_evsel *evsel, int id)
1100 {
1101         int i;
1102
1103         if (!aggr_get_id)
1104                 return 0;
1105
1106         if (stat_config.aggr_mode == AGGR_NONE)
1107                 return id;
1108
1109         if (stat_config.aggr_mode == AGGR_GLOBAL)
1110                 return 0;
1111
1112         for (i = 0; i < perf_evsel__nr_cpus(evsel); i++) {
1113                 int cpu2 = perf_evsel__cpus(evsel)->map[i];
1114
1115                 if (aggr_get_id(evsel_list->cpus, cpu2) == id)
1116                         return cpu2;
1117         }
1118         return 0;
1119 }
1120
1121 static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
1122 {
1123         FILE *output = stat_config.output;
1124         double sc =  evsel->scale;
1125         const char *fmt;
1126
1127         if (csv_output) {
1128                 fmt = floor(sc) != sc ?  "%.2f%s" : "%.0f%s";
1129         } else {
1130                 if (big_num)
1131                         fmt = floor(sc) != sc ? "%'18.2f%s" : "%'18.0f%s";
1132                 else
1133                         fmt = floor(sc) != sc ? "%18.2f%s" : "%18.0f%s";
1134         }
1135
1136         aggr_printout(evsel, id, nr);
1137
1138         fprintf(output, fmt, avg, csv_sep);
1139
1140         if (evsel->unit)
1141                 fprintf(output, "%-*s%s",
1142                         csv_output ? 0 : unit_width,
1143                         evsel->unit, csv_sep);
1144
1145         fprintf(output, "%-*s", csv_output ? 0 : 25, perf_evsel__name(evsel));
1146
1147         if (evsel->cgrp)
1148                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
1149 }
1150
1151 static void printout(int id, int nr, struct perf_evsel *counter, double uval,
1152                      char *prefix, u64 run, u64 ena, double noise)
1153 {
1154         struct perf_stat_output_ctx out;
1155         struct outstate os = {
1156                 .fh = stat_config.output,
1157                 .prefix = prefix ? prefix : "",
1158                 .id = id,
1159                 .nr = nr,
1160                 .evsel = counter,
1161         };
1162         print_metric_t pm = print_metric_std;
1163         void (*nl)(void *);
1164
1165         if (metric_only) {
1166                 nl = new_line_metric;
1167                 if (csv_output)
1168                         pm = print_metric_only_csv;
1169                 else
1170                         pm = print_metric_only;
1171         } else
1172                 nl = new_line_std;
1173
1174         if (csv_output && !metric_only) {
1175                 static int aggr_fields[] = {
1176                         [AGGR_GLOBAL] = 0,
1177                         [AGGR_THREAD] = 1,
1178                         [AGGR_NONE] = 1,
1179                         [AGGR_SOCKET] = 2,
1180                         [AGGR_CORE] = 2,
1181                 };
1182
1183                 pm = print_metric_csv;
1184                 nl = new_line_csv;
1185                 os.nfields = 3;
1186                 os.nfields += aggr_fields[stat_config.aggr_mode];
1187                 if (counter->cgrp)
1188                         os.nfields++;
1189         }
1190         if (run == 0 || ena == 0 || counter->counts->scaled == -1) {
1191                 if (metric_only) {
1192                         pm(&os, NULL, "", "", 0);
1193                         return;
1194                 }
1195                 aggr_printout(counter, id, nr);
1196
1197                 fprintf(stat_config.output, "%*s%s",
1198                         csv_output ? 0 : 18,
1199                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1200                         csv_sep);
1201
1202                 if (counter->supported)
1203                         print_free_counters_hint = 1;
1204
1205                 fprintf(stat_config.output, "%-*s%s",
1206                         csv_output ? 0 : unit_width,
1207                         counter->unit, csv_sep);
1208
1209                 fprintf(stat_config.output, "%*s",
1210                         csv_output ? 0 : -25,
1211                         perf_evsel__name(counter));
1212
1213                 if (counter->cgrp)
1214                         fprintf(stat_config.output, "%s%s",
1215                                 csv_sep, counter->cgrp->name);
1216
1217                 if (!csv_output)
1218                         pm(&os, NULL, NULL, "", 0);
1219                 print_noise(counter, noise);
1220                 print_running(run, ena);
1221                 if (csv_output)
1222                         pm(&os, NULL, NULL, "", 0);
1223                 return;
1224         }
1225
1226         if (metric_only)
1227                 /* nothing */;
1228         else if (nsec_counter(counter))
1229                 nsec_printout(id, nr, counter, uval);
1230         else
1231                 abs_printout(id, nr, counter, uval);
1232
1233         out.print_metric = pm;
1234         out.new_line = nl;
1235         out.ctx = &os;
1236         out.force_header = false;
1237
1238         if (csv_output && !metric_only) {
1239                 print_noise(counter, noise);
1240                 print_running(run, ena);
1241         }
1242
1243         perf_stat__print_shadow_stats(counter, uval,
1244                                 first_shadow_cpu(counter, id),
1245                                 &out, &metric_events);
1246         if (!csv_output && !metric_only) {
1247                 print_noise(counter, noise);
1248                 print_running(run, ena);
1249         }
1250 }
1251
1252 static void aggr_update_shadow(void)
1253 {
1254         int cpu, s2, id, s;
1255         u64 val;
1256         struct perf_evsel *counter;
1257
1258         for (s = 0; s < aggr_map->nr; s++) {
1259                 id = aggr_map->map[s];
1260                 evlist__for_each_entry(evsel_list, counter) {
1261                         val = 0;
1262                         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1263                                 s2 = aggr_get_id(evsel_list->cpus, cpu);
1264                                 if (s2 != id)
1265                                         continue;
1266                                 val += perf_counts(counter->counts, cpu, 0)->val;
1267                         }
1268                         val = val * counter->scale;
1269                         perf_stat__update_shadow_stats(counter, &val,
1270                                                        first_shadow_cpu(counter, id));
1271                 }
1272         }
1273 }
1274
1275 static void collect_all_aliases(struct perf_evsel *counter,
1276                             void (*cb)(struct perf_evsel *counter, void *data,
1277                                        bool first),
1278                             void *data)
1279 {
1280         struct perf_evsel *alias;
1281
1282         alias = list_prepare_entry(counter, &(evsel_list->entries), node);
1283         list_for_each_entry_continue (alias, &evsel_list->entries, node) {
1284                 if (strcmp(perf_evsel__name(alias), perf_evsel__name(counter)) ||
1285                     alias->scale != counter->scale ||
1286                     alias->cgrp != counter->cgrp ||
1287                     strcmp(alias->unit, counter->unit) ||
1288                     nsec_counter(alias) != nsec_counter(counter))
1289                         break;
1290                 alias->merged_stat = true;
1291                 cb(alias, data, false);
1292         }
1293 }
1294
1295 static bool collect_data(struct perf_evsel *counter,
1296                             void (*cb)(struct perf_evsel *counter, void *data,
1297                                        bool first),
1298                             void *data)
1299 {
1300         if (counter->merged_stat)
1301                 return false;
1302         cb(counter, data, true);
1303         if (!no_merge && counter->auto_merge_stats)
1304                 collect_all_aliases(counter, cb, data);
1305         return true;
1306 }
1307
1308 struct aggr_data {
1309         u64 ena, run, val;
1310         int id;
1311         int nr;
1312         int cpu;
1313 };
1314
1315 static void aggr_cb(struct perf_evsel *counter, void *data, bool first)
1316 {
1317         struct aggr_data *ad = data;
1318         int cpu, s2;
1319
1320         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1321                 struct perf_counts_values *counts;
1322
1323                 s2 = aggr_get_id(perf_evsel__cpus(counter), cpu);
1324                 if (s2 != ad->id)
1325                         continue;
1326                 if (first)
1327                         ad->nr++;
1328                 counts = perf_counts(counter->counts, cpu, 0);
1329                 /*
1330                  * When any result is bad, make them all to give
1331                  * consistent output in interval mode.
1332                  */
1333                 if (counts->ena == 0 || counts->run == 0 ||
1334                     counter->counts->scaled == -1) {
1335                         ad->ena = 0;
1336                         ad->run = 0;
1337                         break;
1338                 }
1339                 ad->val += counts->val;
1340                 ad->ena += counts->ena;
1341                 ad->run += counts->run;
1342         }
1343 }
1344
1345 static void print_aggr(char *prefix)
1346 {
1347         FILE *output = stat_config.output;
1348         struct perf_evsel *counter;
1349         int s, id, nr;
1350         double uval;
1351         u64 ena, run, val;
1352         bool first;
1353
1354         if (!(aggr_map || aggr_get_id))
1355                 return;
1356
1357         aggr_update_shadow();
1358
1359         /*
1360          * With metric_only everything is on a single line.
1361          * Without each counter has its own line.
1362          */
1363         for (s = 0; s < aggr_map->nr; s++) {
1364                 struct aggr_data ad;
1365                 if (prefix && metric_only)
1366                         fprintf(output, "%s", prefix);
1367
1368                 ad.id = id = aggr_map->map[s];
1369                 first = true;
1370                 evlist__for_each_entry(evsel_list, counter) {
1371                         if (is_duration_time(counter))
1372                                 continue;
1373
1374                         ad.val = ad.ena = ad.run = 0;
1375                         ad.nr = 0;
1376                         if (!collect_data(counter, aggr_cb, &ad))
1377                                 continue;
1378                         nr = ad.nr;
1379                         ena = ad.ena;
1380                         run = ad.run;
1381                         val = ad.val;
1382                         if (first && metric_only) {
1383                                 first = false;
1384                                 aggr_printout(counter, id, nr);
1385                         }
1386                         if (prefix && !metric_only)
1387                                 fprintf(output, "%s", prefix);
1388
1389                         uval = val * counter->scale;
1390                         printout(id, nr, counter, uval, prefix, run, ena, 1.0);
1391                         if (!metric_only)
1392                                 fputc('\n', output);
1393                 }
1394                 if (metric_only)
1395                         fputc('\n', output);
1396         }
1397 }
1398
1399 static void print_aggr_thread(struct perf_evsel *counter, char *prefix)
1400 {
1401         FILE *output = stat_config.output;
1402         int nthreads = thread_map__nr(counter->threads);
1403         int ncpus = cpu_map__nr(counter->cpus);
1404         int cpu, thread;
1405         double uval;
1406
1407         for (thread = 0; thread < nthreads; thread++) {
1408                 u64 ena = 0, run = 0, val = 0;
1409
1410                 for (cpu = 0; cpu < ncpus; cpu++) {
1411                         val += perf_counts(counter->counts, cpu, thread)->val;
1412                         ena += perf_counts(counter->counts, cpu, thread)->ena;
1413                         run += perf_counts(counter->counts, cpu, thread)->run;
1414                 }
1415
1416                 if (prefix)
1417                         fprintf(output, "%s", prefix);
1418
1419                 uval = val * counter->scale;
1420                 printout(thread, 0, counter, uval, prefix, run, ena, 1.0);
1421                 fputc('\n', output);
1422         }
1423 }
1424
1425 struct caggr_data {
1426         double avg, avg_enabled, avg_running;
1427 };
1428
1429 static void counter_aggr_cb(struct perf_evsel *counter, void *data,
1430                             bool first __maybe_unused)
1431 {
1432         struct caggr_data *cd = data;
1433         struct perf_stat_evsel *ps = counter->priv;
1434
1435         cd->avg += avg_stats(&ps->res_stats[0]);
1436         cd->avg_enabled += avg_stats(&ps->res_stats[1]);
1437         cd->avg_running += avg_stats(&ps->res_stats[2]);
1438 }
1439
1440 /*
1441  * Print out the results of a single counter:
1442  * aggregated counts in system-wide mode
1443  */
1444 static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
1445 {
1446         FILE *output = stat_config.output;
1447         double uval;
1448         struct caggr_data cd = { .avg = 0.0 };
1449
1450         if (!collect_data(counter, counter_aggr_cb, &cd))
1451                 return;
1452
1453         if (prefix && !metric_only)
1454                 fprintf(output, "%s", prefix);
1455
1456         uval = cd.avg * counter->scale;
1457         printout(-1, 0, counter, uval, prefix, cd.avg_running, cd.avg_enabled, cd.avg);
1458         if (!metric_only)
1459                 fprintf(output, "\n");
1460 }
1461
1462 static void counter_cb(struct perf_evsel *counter, void *data,
1463                        bool first __maybe_unused)
1464 {
1465         struct aggr_data *ad = data;
1466
1467         ad->val += perf_counts(counter->counts, ad->cpu, 0)->val;
1468         ad->ena += perf_counts(counter->counts, ad->cpu, 0)->ena;
1469         ad->run += perf_counts(counter->counts, ad->cpu, 0)->run;
1470 }
1471
1472 /*
1473  * Print out the results of a single counter:
1474  * does not use aggregated count in system-wide
1475  */
1476 static void print_counter(struct perf_evsel *counter, char *prefix)
1477 {
1478         FILE *output = stat_config.output;
1479         u64 ena, run, val;
1480         double uval;
1481         int cpu;
1482
1483         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1484                 struct aggr_data ad = { .cpu = cpu };
1485
1486                 if (!collect_data(counter, counter_cb, &ad))
1487                         return;
1488                 val = ad.val;
1489                 ena = ad.ena;
1490                 run = ad.run;
1491
1492                 if (prefix)
1493                         fprintf(output, "%s", prefix);
1494
1495                 uval = val * counter->scale;
1496                 printout(cpu, 0, counter, uval, prefix, run, ena, 1.0);
1497
1498                 fputc('\n', output);
1499         }
1500 }
1501
1502 static void print_no_aggr_metric(char *prefix)
1503 {
1504         int cpu;
1505         int nrcpus = 0;
1506         struct perf_evsel *counter;
1507         u64 ena, run, val;
1508         double uval;
1509
1510         nrcpus = evsel_list->cpus->nr;
1511         for (cpu = 0; cpu < nrcpus; cpu++) {
1512                 bool first = true;
1513
1514                 if (prefix)
1515                         fputs(prefix, stat_config.output);
1516                 evlist__for_each_entry(evsel_list, counter) {
1517                         if (is_duration_time(counter))
1518                                 continue;
1519                         if (first) {
1520                                 aggr_printout(counter, cpu, 0);
1521                                 first = false;
1522                         }
1523                         val = perf_counts(counter->counts, cpu, 0)->val;
1524                         ena = perf_counts(counter->counts, cpu, 0)->ena;
1525                         run = perf_counts(counter->counts, cpu, 0)->run;
1526
1527                         uval = val * counter->scale;
1528                         printout(cpu, 0, counter, uval, prefix, run, ena, 1.0);
1529                 }
1530                 fputc('\n', stat_config.output);
1531         }
1532 }
1533
1534 static int aggr_header_lens[] = {
1535         [AGGR_CORE] = 18,
1536         [AGGR_SOCKET] = 12,
1537         [AGGR_NONE] = 6,
1538         [AGGR_THREAD] = 24,
1539         [AGGR_GLOBAL] = 0,
1540 };
1541
1542 static const char *aggr_header_csv[] = {
1543         [AGGR_CORE]     =       "core,cpus,",
1544         [AGGR_SOCKET]   =       "socket,cpus",
1545         [AGGR_NONE]     =       "cpu,",
1546         [AGGR_THREAD]   =       "comm-pid,",
1547         [AGGR_GLOBAL]   =       ""
1548 };
1549
1550 static void print_metric_headers(const char *prefix, bool no_indent)
1551 {
1552         struct perf_stat_output_ctx out;
1553         struct perf_evsel *counter;
1554         struct outstate os = {
1555                 .fh = stat_config.output
1556         };
1557
1558         if (prefix)
1559                 fprintf(stat_config.output, "%s", prefix);
1560
1561         if (!csv_output && !no_indent)
1562                 fprintf(stat_config.output, "%*s",
1563                         aggr_header_lens[stat_config.aggr_mode], "");
1564         if (csv_output) {
1565                 if (stat_config.interval)
1566                         fputs("time,", stat_config.output);
1567                 fputs(aggr_header_csv[stat_config.aggr_mode],
1568                         stat_config.output);
1569         }
1570
1571         /* Print metrics headers only */
1572         evlist__for_each_entry(evsel_list, counter) {
1573                 if (is_duration_time(counter))
1574                         continue;
1575                 os.evsel = counter;
1576                 out.ctx = &os;
1577                 out.print_metric = print_metric_header;
1578                 out.new_line = new_line_metric;
1579                 out.force_header = true;
1580                 os.evsel = counter;
1581                 perf_stat__print_shadow_stats(counter, 0,
1582                                               0,
1583                                               &out,
1584                                               &metric_events);
1585         }
1586         fputc('\n', stat_config.output);
1587 }
1588
1589 static void print_interval(char *prefix, struct timespec *ts)
1590 {
1591         FILE *output = stat_config.output;
1592         static int num_print_interval;
1593
1594         sprintf(prefix, "%6lu.%09lu%s", ts->tv_sec, ts->tv_nsec, csv_sep);
1595
1596         if (num_print_interval == 0 && !csv_output) {
1597                 switch (stat_config.aggr_mode) {
1598                 case AGGR_SOCKET:
1599                         fprintf(output, "#           time socket cpus");
1600                         if (!metric_only)
1601                                 fprintf(output, "             counts %*s events\n", unit_width, "unit");
1602                         break;
1603                 case AGGR_CORE:
1604                         fprintf(output, "#           time core         cpus");
1605                         if (!metric_only)
1606                                 fprintf(output, "             counts %*s events\n", unit_width, "unit");
1607                         break;
1608                 case AGGR_NONE:
1609                         fprintf(output, "#           time CPU");
1610                         if (!metric_only)
1611                                 fprintf(output, "                counts %*s events\n", unit_width, "unit");
1612                         break;
1613                 case AGGR_THREAD:
1614                         fprintf(output, "#           time             comm-pid");
1615                         if (!metric_only)
1616                                 fprintf(output, "                  counts %*s events\n", unit_width, "unit");
1617                         break;
1618                 case AGGR_GLOBAL:
1619                 default:
1620                         fprintf(output, "#           time");
1621                         if (!metric_only)
1622                                 fprintf(output, "             counts %*s events\n", unit_width, "unit");
1623                 case AGGR_UNSET:
1624                         break;
1625                 }
1626         }
1627
1628         if (num_print_interval == 0 && metric_only)
1629                 print_metric_headers(" ", true);
1630         if (++num_print_interval == 25)
1631                 num_print_interval = 0;
1632 }
1633
1634 static void print_header(int argc, const char **argv)
1635 {
1636         FILE *output = stat_config.output;
1637         int i;
1638
1639         fflush(stdout);
1640
1641         if (!csv_output) {
1642                 fprintf(output, "\n");
1643                 fprintf(output, " Performance counter stats for ");
1644                 if (target.system_wide)
1645                         fprintf(output, "\'system wide");
1646                 else if (target.cpu_list)
1647                         fprintf(output, "\'CPU(s) %s", target.cpu_list);
1648                 else if (!target__has_task(&target)) {
1649                         fprintf(output, "\'%s", argv ? argv[0] : "pipe");
1650                         for (i = 1; argv && (i < argc); i++)
1651                                 fprintf(output, " %s", argv[i]);
1652                 } else if (target.pid)
1653                         fprintf(output, "process id \'%s", target.pid);
1654                 else
1655                         fprintf(output, "thread id \'%s", target.tid);
1656
1657                 fprintf(output, "\'");
1658                 if (run_count > 1)
1659                         fprintf(output, " (%d runs)", run_count);
1660                 fprintf(output, ":\n\n");
1661         }
1662 }
1663
1664 static void print_footer(void)
1665 {
1666         FILE *output = stat_config.output;
1667         int n;
1668
1669         if (!null_run)
1670                 fprintf(output, "\n");
1671         fprintf(output, " %17.9f seconds time elapsed",
1672                         avg_stats(&walltime_nsecs_stats) / NSEC_PER_SEC);
1673         if (run_count > 1) {
1674                 fprintf(output, "                                        ");
1675                 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1676                                 avg_stats(&walltime_nsecs_stats));
1677         }
1678         fprintf(output, "\n\n");
1679
1680         if (print_free_counters_hint &&
1681             sysctl__read_int("kernel/nmi_watchdog", &n) >= 0 &&
1682             n > 0)
1683                 fprintf(output,
1684 "Some events weren't counted. Try disabling the NMI watchdog:\n"
1685 "       echo 0 > /proc/sys/kernel/nmi_watchdog\n"
1686 "       perf stat ...\n"
1687 "       echo 1 > /proc/sys/kernel/nmi_watchdog\n");
1688 }
1689
1690 static void print_counters(struct timespec *ts, int argc, const char **argv)
1691 {
1692         int interval = stat_config.interval;
1693         struct perf_evsel *counter;
1694         char buf[64], *prefix = NULL;
1695
1696         /* Do not print anything if we record to the pipe. */
1697         if (STAT_RECORD && perf_stat.file.is_pipe)
1698                 return;
1699
1700         if (interval)
1701                 print_interval(prefix = buf, ts);
1702         else
1703                 print_header(argc, argv);
1704
1705         if (metric_only) {
1706                 static int num_print_iv;
1707
1708                 if (num_print_iv == 0 && !interval)
1709                         print_metric_headers(prefix, false);
1710                 if (num_print_iv++ == 25)
1711                         num_print_iv = 0;
1712                 if (stat_config.aggr_mode == AGGR_GLOBAL && prefix)
1713                         fprintf(stat_config.output, "%s", prefix);
1714         }
1715
1716         switch (stat_config.aggr_mode) {
1717         case AGGR_CORE:
1718         case AGGR_SOCKET:
1719                 print_aggr(prefix);
1720                 break;
1721         case AGGR_THREAD:
1722                 evlist__for_each_entry(evsel_list, counter) {
1723                         if (is_duration_time(counter))
1724                                 continue;
1725                         print_aggr_thread(counter, prefix);
1726                 }
1727                 break;
1728         case AGGR_GLOBAL:
1729                 evlist__for_each_entry(evsel_list, counter) {
1730                         if (is_duration_time(counter))
1731                                 continue;
1732                         print_counter_aggr(counter, prefix);
1733                 }
1734                 if (metric_only)
1735                         fputc('\n', stat_config.output);
1736                 break;
1737         case AGGR_NONE:
1738                 if (metric_only)
1739                         print_no_aggr_metric(prefix);
1740                 else {
1741                         evlist__for_each_entry(evsel_list, counter) {
1742                                 if (is_duration_time(counter))
1743                                         continue;
1744                                 print_counter(counter, prefix);
1745                         }
1746                 }
1747                 break;
1748         case AGGR_UNSET:
1749         default:
1750                 break;
1751         }
1752
1753         if (!interval && !csv_output)
1754                 print_footer();
1755
1756         fflush(stat_config.output);
1757 }
1758
1759 static volatile int signr = -1;
1760
1761 static void skip_signal(int signo)
1762 {
1763         if ((child_pid == -1) || stat_config.interval)
1764                 done = 1;
1765
1766         signr = signo;
1767         /*
1768          * render child_pid harmless
1769          * won't send SIGTERM to a random
1770          * process in case of race condition
1771          * and fast PID recycling
1772          */
1773         child_pid = -1;
1774 }
1775
1776 static void sig_atexit(void)
1777 {
1778         sigset_t set, oset;
1779
1780         /*
1781          * avoid race condition with SIGCHLD handler
1782          * in skip_signal() which is modifying child_pid
1783          * goal is to avoid send SIGTERM to a random
1784          * process
1785          */
1786         sigemptyset(&set);
1787         sigaddset(&set, SIGCHLD);
1788         sigprocmask(SIG_BLOCK, &set, &oset);
1789
1790         if (child_pid != -1)
1791                 kill(child_pid, SIGTERM);
1792
1793         sigprocmask(SIG_SETMASK, &oset, NULL);
1794
1795         if (signr == -1)
1796                 return;
1797
1798         signal(signr, SIG_DFL);
1799         kill(getpid(), signr);
1800 }
1801
1802 static int stat__set_big_num(const struct option *opt __maybe_unused,
1803                              const char *s __maybe_unused, int unset)
1804 {
1805         big_num_opt = unset ? 0 : 1;
1806         return 0;
1807 }
1808
1809 static int enable_metric_only(const struct option *opt __maybe_unused,
1810                               const char *s __maybe_unused, int unset)
1811 {
1812         force_metric_only = true;
1813         metric_only = !unset;
1814         return 0;
1815 }
1816
1817 static int parse_metric_groups(const struct option *opt,
1818                                const char *str,
1819                                int unset __maybe_unused)
1820 {
1821         return metricgroup__parse_groups(opt, str, &metric_events);
1822 }
1823
1824 static const struct option stat_options[] = {
1825         OPT_BOOLEAN('T', "transaction", &transaction_run,
1826                     "hardware transaction statistics"),
1827         OPT_CALLBACK('e', "event", &evsel_list, "event",
1828                      "event selector. use 'perf list' to list available events",
1829                      parse_events_option),
1830         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1831                      "event filter", parse_filter),
1832         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1833                     "child tasks do not inherit counters"),
1834         OPT_STRING('p', "pid", &target.pid, "pid",
1835                    "stat events on existing process id"),
1836         OPT_STRING('t', "tid", &target.tid, "tid",
1837                    "stat events on existing thread id"),
1838         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1839                     "system-wide collection from all CPUs"),
1840         OPT_BOOLEAN('g', "group", &group,
1841                     "put the counters into a counter group"),
1842         OPT_BOOLEAN('c', "scale", &stat_config.scale, "scale/normalize counters"),
1843         OPT_INCR('v', "verbose", &verbose,
1844                     "be more verbose (show counter open errors, etc)"),
1845         OPT_INTEGER('r', "repeat", &run_count,
1846                     "repeat command and print average + stddev (max: 100, forever: 0)"),
1847         OPT_BOOLEAN('n', "null", &null_run,
1848                     "null run - dont start any counters"),
1849         OPT_INCR('d', "detailed", &detailed_run,
1850                     "detailed run - start a lot of events"),
1851         OPT_BOOLEAN('S', "sync", &sync_run,
1852                     "call sync() before starting a run"),
1853         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1854                            "print large numbers with thousands\' separators",
1855                            stat__set_big_num),
1856         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1857                     "list of cpus to monitor in system-wide"),
1858         OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
1859                     "disable CPU count aggregation", AGGR_NONE),
1860         OPT_BOOLEAN(0, "no-merge", &no_merge, "Do not merge identical named events"),
1861         OPT_STRING('x', "field-separator", &csv_sep, "separator",
1862                    "print counts with custom separator"),
1863         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1864                      "monitor event in cgroup name only", parse_cgroups),
1865         OPT_STRING('o', "output", &output_name, "file", "output file name"),
1866         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1867         OPT_INTEGER(0, "log-fd", &output_fd,
1868                     "log output to fd, instead of stderr"),
1869         OPT_STRING(0, "pre", &pre_cmd, "command",
1870                         "command to run prior to the measured command"),
1871         OPT_STRING(0, "post", &post_cmd, "command",
1872                         "command to run after to the measured command"),
1873         OPT_UINTEGER('I', "interval-print", &stat_config.interval,
1874                     "print counts at regular interval in ms (>= 10)"),
1875         OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
1876                      "aggregate counts per processor socket", AGGR_SOCKET),
1877         OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
1878                      "aggregate counts per physical processor core", AGGR_CORE),
1879         OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
1880                      "aggregate counts per thread", AGGR_THREAD),
1881         OPT_UINTEGER('D', "delay", &initial_delay,
1882                      "ms to wait before starting measurement after program start"),
1883         OPT_CALLBACK_NOOPT(0, "metric-only", &metric_only, NULL,
1884                         "Only print computed metrics. No raw values", enable_metric_only),
1885         OPT_BOOLEAN(0, "topdown", &topdown_run,
1886                         "measure topdown level 1 statistics"),
1887         OPT_BOOLEAN(0, "smi-cost", &smi_cost,
1888                         "measure SMI cost"),
1889         OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
1890                      "monitor specified metrics or metric groups (separated by ,)",
1891                      parse_metric_groups),
1892         OPT_END()
1893 };
1894
1895 static int perf_stat__get_socket(struct cpu_map *map, int cpu)
1896 {
1897         return cpu_map__get_socket(map, cpu, NULL);
1898 }
1899
1900 static int perf_stat__get_core(struct cpu_map *map, int cpu)
1901 {
1902         return cpu_map__get_core(map, cpu, NULL);
1903 }
1904
1905 static int cpu_map__get_max(struct cpu_map *map)
1906 {
1907         int i, max = -1;
1908
1909         for (i = 0; i < map->nr; i++) {
1910                 if (map->map[i] > max)
1911                         max = map->map[i];
1912         }
1913
1914         return max;
1915 }
1916
1917 static struct cpu_map *cpus_aggr_map;
1918
1919 static int perf_stat__get_aggr(aggr_get_id_t get_id, struct cpu_map *map, int idx)
1920 {
1921         int cpu;
1922
1923         if (idx >= map->nr)
1924                 return -1;
1925
1926         cpu = map->map[idx];
1927
1928         if (cpus_aggr_map->map[cpu] == -1)
1929                 cpus_aggr_map->map[cpu] = get_id(map, idx);
1930
1931         return cpus_aggr_map->map[cpu];
1932 }
1933
1934 static int perf_stat__get_socket_cached(struct cpu_map *map, int idx)
1935 {
1936         return perf_stat__get_aggr(perf_stat__get_socket, map, idx);
1937 }
1938
1939 static int perf_stat__get_core_cached(struct cpu_map *map, int idx)
1940 {
1941         return perf_stat__get_aggr(perf_stat__get_core, map, idx);
1942 }
1943
1944 static int perf_stat_init_aggr_mode(void)
1945 {
1946         int nr;
1947
1948         switch (stat_config.aggr_mode) {
1949         case AGGR_SOCKET:
1950                 if (cpu_map__build_socket_map(evsel_list->cpus, &aggr_map)) {
1951                         perror("cannot build socket map");
1952                         return -1;
1953                 }
1954                 aggr_get_id = perf_stat__get_socket_cached;
1955                 break;
1956         case AGGR_CORE:
1957                 if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
1958                         perror("cannot build core map");
1959                         return -1;
1960                 }
1961                 aggr_get_id = perf_stat__get_core_cached;
1962                 break;
1963         case AGGR_NONE:
1964         case AGGR_GLOBAL:
1965         case AGGR_THREAD:
1966         case AGGR_UNSET:
1967         default:
1968                 break;
1969         }
1970
1971         /*
1972          * The evsel_list->cpus is the base we operate on,
1973          * taking the highest cpu number to be the size of
1974          * the aggregation translate cpumap.
1975          */
1976         nr = cpu_map__get_max(evsel_list->cpus);
1977         cpus_aggr_map = cpu_map__empty_new(nr + 1);
1978         return cpus_aggr_map ? 0 : -ENOMEM;
1979 }
1980
1981 static void perf_stat__exit_aggr_mode(void)
1982 {
1983         cpu_map__put(aggr_map);
1984         cpu_map__put(cpus_aggr_map);
1985         aggr_map = NULL;
1986         cpus_aggr_map = NULL;
1987 }
1988
1989 static inline int perf_env__get_cpu(struct perf_env *env, struct cpu_map *map, int idx)
1990 {
1991         int cpu;
1992
1993         if (idx > map->nr)
1994                 return -1;
1995
1996         cpu = map->map[idx];
1997
1998         if (cpu >= env->nr_cpus_avail)
1999                 return -1;
2000
2001         return cpu;
2002 }
2003
2004 static int perf_env__get_socket(struct cpu_map *map, int idx, void *data)
2005 {
2006         struct perf_env *env = data;
2007         int cpu = perf_env__get_cpu(env, map, idx);
2008
2009         return cpu == -1 ? -1 : env->cpu[cpu].socket_id;
2010 }
2011
2012 static int perf_env__get_core(struct cpu_map *map, int idx, void *data)
2013 {
2014         struct perf_env *env = data;
2015         int core = -1, cpu = perf_env__get_cpu(env, map, idx);
2016
2017         if (cpu != -1) {
2018                 int socket_id = env->cpu[cpu].socket_id;
2019
2020                 /*
2021                  * Encode socket in upper 16 bits
2022                  * core_id is relative to socket, and
2023                  * we need a global id. So we combine
2024                  * socket + core id.
2025                  */
2026                 core = (socket_id << 16) | (env->cpu[cpu].core_id & 0xffff);
2027         }
2028
2029         return core;
2030 }
2031
2032 static int perf_env__build_socket_map(struct perf_env *env, struct cpu_map *cpus,
2033                                       struct cpu_map **sockp)
2034 {
2035         return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
2036 }
2037
2038 static int perf_env__build_core_map(struct perf_env *env, struct cpu_map *cpus,
2039                                     struct cpu_map **corep)
2040 {
2041         return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
2042 }
2043
2044 static int perf_stat__get_socket_file(struct cpu_map *map, int idx)
2045 {
2046         return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
2047 }
2048
2049 static int perf_stat__get_core_file(struct cpu_map *map, int idx)
2050 {
2051         return perf_env__get_core(map, idx, &perf_stat.session->header.env);
2052 }
2053
2054 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
2055 {
2056         struct perf_env *env = &st->session->header.env;
2057
2058         switch (stat_config.aggr_mode) {
2059         case AGGR_SOCKET:
2060                 if (perf_env__build_socket_map(env, evsel_list->cpus, &aggr_map)) {
2061                         perror("cannot build socket map");
2062                         return -1;
2063                 }
2064                 aggr_get_id = perf_stat__get_socket_file;
2065                 break;
2066         case AGGR_CORE:
2067                 if (perf_env__build_core_map(env, evsel_list->cpus, &aggr_map)) {
2068                         perror("cannot build core map");
2069                         return -1;
2070                 }
2071                 aggr_get_id = perf_stat__get_core_file;
2072                 break;
2073         case AGGR_NONE:
2074         case AGGR_GLOBAL:
2075         case AGGR_THREAD:
2076         case AGGR_UNSET:
2077         default:
2078                 break;
2079         }
2080
2081         return 0;
2082 }
2083
2084 static int topdown_filter_events(const char **attr, char **str, bool use_group)
2085 {
2086         int off = 0;
2087         int i;
2088         int len = 0;
2089         char *s;
2090
2091         for (i = 0; attr[i]; i++) {
2092                 if (pmu_have_event("cpu", attr[i])) {
2093                         len += strlen(attr[i]) + 1;
2094                         attr[i - off] = attr[i];
2095                 } else
2096                         off++;
2097         }
2098         attr[i - off] = NULL;
2099
2100         *str = malloc(len + 1 + 2);
2101         if (!*str)
2102                 return -1;
2103         s = *str;
2104         if (i - off == 0) {
2105                 *s = 0;
2106                 return 0;
2107         }
2108         if (use_group)
2109                 *s++ = '{';
2110         for (i = 0; attr[i]; i++) {
2111                 strcpy(s, attr[i]);
2112                 s += strlen(s);
2113                 *s++ = ',';
2114         }
2115         if (use_group) {
2116                 s[-1] = '}';
2117                 *s = 0;
2118         } else
2119                 s[-1] = 0;
2120         return 0;
2121 }
2122
2123 __weak bool arch_topdown_check_group(bool *warn)
2124 {
2125         *warn = false;
2126         return false;
2127 }
2128
2129 __weak void arch_topdown_group_warn(void)
2130 {
2131 }
2132
2133 /*
2134  * Add default attributes, if there were no attributes specified or
2135  * if -d/--detailed, -d -d or -d -d -d is used:
2136  */
2137 static int add_default_attributes(void)
2138 {
2139         int err;
2140         struct perf_event_attr default_attrs0[] = {
2141
2142   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
2143   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
2144   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
2145   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
2146
2147   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
2148 };
2149         struct perf_event_attr frontend_attrs[] = {
2150   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
2151 };
2152         struct perf_event_attr backend_attrs[] = {
2153   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
2154 };
2155         struct perf_event_attr default_attrs1[] = {
2156   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
2157   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
2158   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
2159
2160 };
2161
2162 /*
2163  * Detailed stats (-d), covering the L1 and last level data caches:
2164  */
2165         struct perf_event_attr detailed_attrs[] = {
2166
2167   { .type = PERF_TYPE_HW_CACHE,
2168     .config =
2169          PERF_COUNT_HW_CACHE_L1D                <<  0  |
2170         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2171         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2172
2173   { .type = PERF_TYPE_HW_CACHE,
2174     .config =
2175          PERF_COUNT_HW_CACHE_L1D                <<  0  |
2176         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2177         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2178
2179   { .type = PERF_TYPE_HW_CACHE,
2180     .config =
2181          PERF_COUNT_HW_CACHE_LL                 <<  0  |
2182         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2183         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2184
2185   { .type = PERF_TYPE_HW_CACHE,
2186     .config =
2187          PERF_COUNT_HW_CACHE_LL                 <<  0  |
2188         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2189         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2190 };
2191
2192 /*
2193  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
2194  */
2195         struct perf_event_attr very_detailed_attrs[] = {
2196
2197   { .type = PERF_TYPE_HW_CACHE,
2198     .config =
2199          PERF_COUNT_HW_CACHE_L1I                <<  0  |
2200         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2201         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2202
2203   { .type = PERF_TYPE_HW_CACHE,
2204     .config =
2205          PERF_COUNT_HW_CACHE_L1I                <<  0  |
2206         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2207         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2208
2209   { .type = PERF_TYPE_HW_CACHE,
2210     .config =
2211          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
2212         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2213         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2214
2215   { .type = PERF_TYPE_HW_CACHE,
2216     .config =
2217          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
2218         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2219         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2220
2221   { .type = PERF_TYPE_HW_CACHE,
2222     .config =
2223          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
2224         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2225         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2226
2227   { .type = PERF_TYPE_HW_CACHE,
2228     .config =
2229          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
2230         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2231         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2232
2233 };
2234
2235 /*
2236  * Very, very detailed stats (-d -d -d), adding prefetch events:
2237  */
2238         struct perf_event_attr very_very_detailed_attrs[] = {
2239
2240   { .type = PERF_TYPE_HW_CACHE,
2241     .config =
2242          PERF_COUNT_HW_CACHE_L1D                <<  0  |
2243         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
2244         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2245
2246   { .type = PERF_TYPE_HW_CACHE,
2247     .config =
2248          PERF_COUNT_HW_CACHE_L1D                <<  0  |
2249         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
2250         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2251 };
2252
2253         /* Set attrs if no event is selected and !null_run: */
2254         if (null_run)
2255                 return 0;
2256
2257         if (transaction_run) {
2258                 if (pmu_have_event("cpu", "cycles-ct") &&
2259                     pmu_have_event("cpu", "el-start"))
2260                         err = parse_events(evsel_list, transaction_attrs, NULL);
2261                 else
2262                         err = parse_events(evsel_list, transaction_limited_attrs, NULL);
2263                 if (err) {
2264                         fprintf(stderr, "Cannot set up transaction events\n");
2265                         return -1;
2266                 }
2267                 return 0;
2268         }
2269
2270         if (smi_cost) {
2271                 int smi;
2272
2273                 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
2274                         fprintf(stderr, "freeze_on_smi is not supported.\n");
2275                         return -1;
2276                 }
2277
2278                 if (!smi) {
2279                         if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) {
2280                                 fprintf(stderr, "Failed to set freeze_on_smi.\n");
2281                                 return -1;
2282                         }
2283                         smi_reset = true;
2284                 }
2285
2286                 if (pmu_have_event("msr", "aperf") &&
2287                     pmu_have_event("msr", "smi")) {
2288                         if (!force_metric_only)
2289                                 metric_only = true;
2290                         err = parse_events(evsel_list, smi_cost_attrs, NULL);
2291                 } else {
2292                         fprintf(stderr, "To measure SMI cost, it needs "
2293                                 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n");
2294                         return -1;
2295                 }
2296                 if (err) {
2297                         fprintf(stderr, "Cannot set up SMI cost events\n");
2298                         return -1;
2299                 }
2300                 return 0;
2301         }
2302
2303         if (topdown_run) {
2304                 char *str = NULL;
2305                 bool warn = false;
2306
2307                 if (stat_config.aggr_mode != AGGR_GLOBAL &&
2308                     stat_config.aggr_mode != AGGR_CORE) {
2309                         pr_err("top down event configuration requires --per-core mode\n");
2310                         return -1;
2311                 }
2312                 stat_config.aggr_mode = AGGR_CORE;
2313                 if (nr_cgroups || !target__has_cpu(&target)) {
2314                         pr_err("top down event configuration requires system-wide mode (-a)\n");
2315                         return -1;
2316                 }
2317
2318                 if (!force_metric_only)
2319                         metric_only = true;
2320                 if (topdown_filter_events(topdown_attrs, &str,
2321                                 arch_topdown_check_group(&warn)) < 0) {
2322                         pr_err("Out of memory\n");
2323                         return -1;
2324                 }
2325                 if (topdown_attrs[0] && str) {
2326                         if (warn)
2327                                 arch_topdown_group_warn();
2328                         err = parse_events(evsel_list, str, NULL);
2329                         if (err) {
2330                                 fprintf(stderr,
2331                                         "Cannot set up top down events %s: %d\n",
2332                                         str, err);
2333                                 free(str);
2334                                 return -1;
2335                         }
2336                 } else {
2337                         fprintf(stderr, "System does not support topdown\n");
2338                         return -1;
2339                 }
2340                 free(str);
2341         }
2342
2343         if (!evsel_list->nr_entries) {
2344                 if (target__has_cpu(&target))
2345                         default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
2346
2347                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
2348                         return -1;
2349                 if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
2350                         if (perf_evlist__add_default_attrs(evsel_list,
2351                                                 frontend_attrs) < 0)
2352                                 return -1;
2353                 }
2354                 if (pmu_have_event("cpu", "stalled-cycles-backend")) {
2355                         if (perf_evlist__add_default_attrs(evsel_list,
2356                                                 backend_attrs) < 0)
2357                                 return -1;
2358                 }
2359                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
2360                         return -1;
2361         }
2362
2363         /* Detailed events get appended to the event list: */
2364
2365         if (detailed_run <  1)
2366                 return 0;
2367
2368         /* Append detailed run extra attributes: */
2369         if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
2370                 return -1;
2371
2372         if (detailed_run < 2)
2373                 return 0;
2374
2375         /* Append very detailed run extra attributes: */
2376         if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
2377                 return -1;
2378
2379         if (detailed_run < 3)
2380                 return 0;
2381
2382         /* Append very, very detailed run extra attributes: */
2383         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
2384 }
2385
2386 static const char * const stat_record_usage[] = {
2387         "perf stat record [<options>]",
2388         NULL,
2389 };
2390
2391 static void init_features(struct perf_session *session)
2392 {
2393         int feat;
2394
2395         for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
2396                 perf_header__set_feat(&session->header, feat);
2397
2398         perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
2399         perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
2400         perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
2401         perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
2402 }
2403
2404 static int __cmd_record(int argc, const char **argv)
2405 {
2406         struct perf_session *session;
2407         struct perf_data_file *file = &perf_stat.file;
2408
2409         argc = parse_options(argc, argv, stat_options, stat_record_usage,
2410                              PARSE_OPT_STOP_AT_NON_OPTION);
2411
2412         if (output_name)
2413                 file->path = output_name;
2414
2415         if (run_count != 1 || forever) {
2416                 pr_err("Cannot use -r option with perf stat record.\n");
2417                 return -1;
2418         }
2419
2420         session = perf_session__new(file, false, NULL);
2421         if (session == NULL) {
2422                 pr_err("Perf session creation failed.\n");
2423                 return -1;
2424         }
2425
2426         init_features(session);
2427
2428         session->evlist   = evsel_list;
2429         perf_stat.session = session;
2430         perf_stat.record  = true;
2431         return argc;
2432 }
2433
2434 static int process_stat_round_event(struct perf_tool *tool __maybe_unused,
2435                                     union perf_event *event,
2436                                     struct perf_session *session)
2437 {
2438         struct stat_round_event *stat_round = &event->stat_round;
2439         struct perf_evsel *counter;
2440         struct timespec tsh, *ts = NULL;
2441         const char **argv = session->header.env.cmdline_argv;
2442         int argc = session->header.env.nr_cmdline;
2443
2444         evlist__for_each_entry(evsel_list, counter)
2445                 perf_stat_process_counter(&stat_config, counter);
2446
2447         if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
2448                 update_stats(&walltime_nsecs_stats, stat_round->time);
2449
2450         if (stat_config.interval && stat_round->time) {
2451                 tsh.tv_sec  = stat_round->time / NSEC_PER_SEC;
2452                 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
2453                 ts = &tsh;
2454         }
2455
2456         print_counters(ts, argc, argv);
2457         return 0;
2458 }
2459
2460 static
2461 int process_stat_config_event(struct perf_tool *tool,
2462                               union perf_event *event,
2463                               struct perf_session *session __maybe_unused)
2464 {
2465         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2466
2467         perf_event__read_stat_config(&stat_config, &event->stat_config);
2468
2469         if (cpu_map__empty(st->cpus)) {
2470                 if (st->aggr_mode != AGGR_UNSET)
2471                         pr_warning("warning: processing task data, aggregation mode not set\n");
2472                 return 0;
2473         }
2474
2475         if (st->aggr_mode != AGGR_UNSET)
2476                 stat_config.aggr_mode = st->aggr_mode;
2477
2478         if (perf_stat.file.is_pipe)
2479                 perf_stat_init_aggr_mode();
2480         else
2481                 perf_stat_init_aggr_mode_file(st);
2482
2483         return 0;
2484 }
2485
2486 static int set_maps(struct perf_stat *st)
2487 {
2488         if (!st->cpus || !st->threads)
2489                 return 0;
2490
2491         if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
2492                 return -EINVAL;
2493
2494         perf_evlist__set_maps(evsel_list, st->cpus, st->threads);
2495
2496         if (perf_evlist__alloc_stats(evsel_list, true))
2497                 return -ENOMEM;
2498
2499         st->maps_allocated = true;
2500         return 0;
2501 }
2502
2503 static
2504 int process_thread_map_event(struct perf_tool *tool,
2505                              union perf_event *event,
2506                              struct perf_session *session __maybe_unused)
2507 {
2508         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2509
2510         if (st->threads) {
2511                 pr_warning("Extra thread map event, ignoring.\n");
2512                 return 0;
2513         }
2514
2515         st->threads = thread_map__new_event(&event->thread_map);
2516         if (!st->threads)
2517                 return -ENOMEM;
2518
2519         return set_maps(st);
2520 }
2521
2522 static
2523 int process_cpu_map_event(struct perf_tool *tool,
2524                           union perf_event *event,
2525                           struct perf_session *session __maybe_unused)
2526 {
2527         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2528         struct cpu_map *cpus;
2529
2530         if (st->cpus) {
2531                 pr_warning("Extra cpu map event, ignoring.\n");
2532                 return 0;
2533         }
2534
2535         cpus = cpu_map__new_data(&event->cpu_map.data);
2536         if (!cpus)
2537                 return -ENOMEM;
2538
2539         st->cpus = cpus;
2540         return set_maps(st);
2541 }
2542
2543 static const char * const stat_report_usage[] = {
2544         "perf stat report [<options>]",
2545         NULL,
2546 };
2547
2548 static struct perf_stat perf_stat = {
2549         .tool = {
2550                 .attr           = perf_event__process_attr,
2551                 .event_update   = perf_event__process_event_update,
2552                 .thread_map     = process_thread_map_event,
2553                 .cpu_map        = process_cpu_map_event,
2554                 .stat_config    = process_stat_config_event,
2555                 .stat           = perf_event__process_stat_event,
2556                 .stat_round     = process_stat_round_event,
2557         },
2558         .aggr_mode = AGGR_UNSET,
2559 };
2560
2561 static int __cmd_report(int argc, const char **argv)
2562 {
2563         struct perf_session *session;
2564         const struct option options[] = {
2565         OPT_STRING('i', "input", &input_name, "file", "input file name"),
2566         OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
2567                      "aggregate counts per processor socket", AGGR_SOCKET),
2568         OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
2569                      "aggregate counts per physical processor core", AGGR_CORE),
2570         OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
2571                      "disable CPU count aggregation", AGGR_NONE),
2572         OPT_END()
2573         };
2574         struct stat st;
2575         int ret;
2576
2577         argc = parse_options(argc, argv, options, stat_report_usage, 0);
2578
2579         if (!input_name || !strlen(input_name)) {
2580                 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
2581                         input_name = "-";
2582                 else
2583                         input_name = "perf.data";
2584         }
2585
2586         perf_stat.file.path = input_name;
2587         perf_stat.file.mode = PERF_DATA_MODE_READ;
2588
2589         session = perf_session__new(&perf_stat.file, false, &perf_stat.tool);
2590         if (session == NULL)
2591                 return -1;
2592
2593         perf_stat.session  = session;
2594         stat_config.output = stderr;
2595         evsel_list         = session->evlist;
2596
2597         ret = perf_session__process_events(session);
2598         if (ret)
2599                 return ret;
2600
2601         perf_session__delete(session);
2602         return 0;
2603 }
2604
2605 static void setup_system_wide(int forks)
2606 {
2607         /*
2608          * Make system wide (-a) the default target if
2609          * no target was specified and one of following
2610          * conditions is met:
2611          *
2612          *   - there's no workload specified
2613          *   - there is workload specified but all requested
2614          *     events are system wide events
2615          */
2616         if (!target__none(&target))
2617                 return;
2618
2619         if (!forks)
2620                 target.system_wide = true;
2621         else {
2622                 struct perf_evsel *counter;
2623
2624                 evlist__for_each_entry(evsel_list, counter) {
2625                         if (!counter->system_wide)
2626                                 return;
2627                 }
2628
2629                 if (evsel_list->nr_entries)
2630                         target.system_wide = true;
2631         }
2632 }
2633
2634 int cmd_stat(int argc, const char **argv)
2635 {
2636         const char * const stat_usage[] = {
2637                 "perf stat [<options>] [<command>]",
2638                 NULL
2639         };
2640         int status = -EINVAL, run_idx;
2641         const char *mode;
2642         FILE *output = stderr;
2643         unsigned int interval;
2644         const char * const stat_subcommands[] = { "record", "report" };
2645
2646         setlocale(LC_ALL, "");
2647
2648         evsel_list = perf_evlist__new();
2649         if (evsel_list == NULL)
2650                 return -ENOMEM;
2651
2652         parse_events__shrink_config_terms();
2653         argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
2654                                         (const char **) stat_usage,
2655                                         PARSE_OPT_STOP_AT_NON_OPTION);
2656         perf_stat__collect_metric_expr(evsel_list);
2657         perf_stat__init_shadow_stats();
2658
2659         if (csv_sep) {
2660                 csv_output = true;
2661                 if (!strcmp(csv_sep, "\\t"))
2662                         csv_sep = "\t";
2663         } else
2664                 csv_sep = DEFAULT_SEPARATOR;
2665
2666         if (argc && !strncmp(argv[0], "rec", 3)) {
2667                 argc = __cmd_record(argc, argv);
2668                 if (argc < 0)
2669                         return -1;
2670         } else if (argc && !strncmp(argv[0], "rep", 3))
2671                 return __cmd_report(argc, argv);
2672
2673         interval = stat_config.interval;
2674
2675         /*
2676          * For record command the -o is already taken care of.
2677          */
2678         if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
2679                 output = NULL;
2680
2681         if (output_name && output_fd) {
2682                 fprintf(stderr, "cannot use both --output and --log-fd\n");
2683                 parse_options_usage(stat_usage, stat_options, "o", 1);
2684                 parse_options_usage(NULL, stat_options, "log-fd", 0);
2685                 goto out;
2686         }
2687
2688         if (metric_only && stat_config.aggr_mode == AGGR_THREAD) {
2689                 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
2690                 goto out;
2691         }
2692
2693         if (metric_only && run_count > 1) {
2694                 fprintf(stderr, "--metric-only is not supported with -r\n");
2695                 goto out;
2696         }
2697
2698         if (output_fd < 0) {
2699                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
2700                 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
2701                 goto out;
2702         }
2703
2704         if (!output) {
2705                 struct timespec tm;
2706                 mode = append_file ? "a" : "w";
2707
2708                 output = fopen(output_name, mode);
2709                 if (!output) {
2710                         perror("failed to create output file");
2711                         return -1;
2712                 }
2713                 clock_gettime(CLOCK_REALTIME, &tm);
2714                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
2715         } else if (output_fd > 0) {
2716                 mode = append_file ? "a" : "w";
2717                 output = fdopen(output_fd, mode);
2718                 if (!output) {
2719                         perror("Failed opening logfd");
2720                         return -errno;
2721                 }
2722         }
2723
2724         stat_config.output = output;
2725
2726         /*
2727          * let the spreadsheet do the pretty-printing
2728          */
2729         if (csv_output) {
2730                 /* User explicitly passed -B? */
2731                 if (big_num_opt == 1) {
2732                         fprintf(stderr, "-B option not supported with -x\n");
2733                         parse_options_usage(stat_usage, stat_options, "B", 1);
2734                         parse_options_usage(NULL, stat_options, "x", 1);
2735                         goto out;
2736                 } else /* Nope, so disable big number formatting */
2737                         big_num = false;
2738         } else if (big_num_opt == 0) /* User passed --no-big-num */
2739                 big_num = false;
2740
2741         setup_system_wide(argc);
2742
2743         if (run_count < 0) {
2744                 pr_err("Run count must be a positive number\n");
2745                 parse_options_usage(stat_usage, stat_options, "r", 1);
2746                 goto out;
2747         } else if (run_count == 0) {
2748                 forever = true;
2749                 run_count = 1;
2750         }
2751
2752         if ((stat_config.aggr_mode == AGGR_THREAD) && !target__has_task(&target)) {
2753                 fprintf(stderr, "The --per-thread option is only available "
2754                         "when monitoring via -p -t options.\n");
2755                 parse_options_usage(NULL, stat_options, "p", 1);
2756                 parse_options_usage(NULL, stat_options, "t", 1);
2757                 goto out;
2758         }
2759
2760         /*
2761          * no_aggr, cgroup are for system-wide only
2762          * --per-thread is aggregated per thread, we dont mix it with cpu mode
2763          */
2764         if (((stat_config.aggr_mode != AGGR_GLOBAL &&
2765               stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
2766             !target__has_cpu(&target)) {
2767                 fprintf(stderr, "both cgroup and no-aggregation "
2768                         "modes only available in system-wide mode\n");
2769
2770                 parse_options_usage(stat_usage, stat_options, "G", 1);
2771                 parse_options_usage(NULL, stat_options, "A", 1);
2772                 parse_options_usage(NULL, stat_options, "a", 1);
2773                 goto out;
2774         }
2775
2776         if (add_default_attributes())
2777                 goto out;
2778
2779         target__validate(&target);
2780
2781         if (perf_evlist__create_maps(evsel_list, &target) < 0) {
2782                 if (target__has_task(&target)) {
2783                         pr_err("Problems finding threads of monitor\n");
2784                         parse_options_usage(stat_usage, stat_options, "p", 1);
2785                         parse_options_usage(NULL, stat_options, "t", 1);
2786                 } else if (target__has_cpu(&target)) {
2787                         perror("failed to parse CPUs map");
2788                         parse_options_usage(stat_usage, stat_options, "C", 1);
2789                         parse_options_usage(NULL, stat_options, "a", 1);
2790                 }
2791                 goto out;
2792         }
2793
2794         /*
2795          * Initialize thread_map with comm names,
2796          * so we could print it out on output.
2797          */
2798         if (stat_config.aggr_mode == AGGR_THREAD)
2799                 thread_map__read_comms(evsel_list->threads);
2800
2801         if (interval && interval < 100) {
2802                 if (interval < 10) {
2803                         pr_err("print interval must be >= 10ms\n");
2804                         parse_options_usage(stat_usage, stat_options, "I", 1);
2805                         goto out;
2806                 } else
2807                         pr_warning("print interval < 100ms. "
2808                                    "The overhead percentage could be high in some cases. "
2809                                    "Please proceed with caution.\n");
2810         }
2811
2812         if (perf_evlist__alloc_stats(evsel_list, interval))
2813                 goto out;
2814
2815         if (perf_stat_init_aggr_mode())
2816                 goto out;
2817
2818         /*
2819          * We dont want to block the signals - that would cause
2820          * child tasks to inherit that and Ctrl-C would not work.
2821          * What we want is for Ctrl-C to work in the exec()-ed
2822          * task, but being ignored by perf stat itself:
2823          */
2824         atexit(sig_atexit);
2825         if (!forever)
2826                 signal(SIGINT,  skip_signal);
2827         signal(SIGCHLD, skip_signal);
2828         signal(SIGALRM, skip_signal);
2829         signal(SIGABRT, skip_signal);
2830
2831         status = 0;
2832         for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
2833                 if (run_count != 1 && verbose > 0)
2834                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
2835                                 run_idx + 1);
2836
2837                 status = run_perf_stat(argc, argv);
2838                 if (forever && status != -1) {
2839                         print_counters(NULL, argc, argv);
2840                         perf_stat__reset_stats();
2841                 }
2842         }
2843
2844         if (!forever && status != -1 && !interval)
2845                 print_counters(NULL, argc, argv);
2846
2847         if (STAT_RECORD) {
2848                 /*
2849                  * We synthesize the kernel mmap record just so that older tools
2850                  * don't emit warnings about not being able to resolve symbols
2851                  * due to /proc/sys/kernel/kptr_restrict settings and instear provide
2852                  * a saner message about no samples being in the perf.data file.
2853                  *
2854                  * This also serves to suppress a warning about f_header.data.size == 0
2855                  * in header.c at the moment 'perf stat record' gets introduced, which
2856                  * is not really needed once we start adding the stat specific PERF_RECORD_
2857                  * records, but the need to suppress the kptr_restrict messages in older
2858                  * tools remain  -acme
2859                  */
2860                 int fd = perf_data_file__fd(&perf_stat.file);
2861                 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
2862                                                              process_synthesized_event,
2863                                                              &perf_stat.session->machines.host);
2864                 if (err) {
2865                         pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
2866                                    "older tools may produce warnings about this file\n.");
2867                 }
2868
2869                 if (!interval) {
2870                         if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
2871                                 pr_err("failed to write stat round event\n");
2872                 }
2873
2874                 if (!perf_stat.file.is_pipe) {
2875                         perf_stat.session->header.data_size += perf_stat.bytes_written;
2876                         perf_session__write_header(perf_stat.session, evsel_list, fd, true);
2877                 }
2878
2879                 perf_session__delete(perf_stat.session);
2880         }
2881
2882         perf_stat__exit_aggr_mode();
2883         perf_evlist__free_stats(evsel_list);
2884 out:
2885         if (smi_cost && smi_reset)
2886                 sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
2887
2888         perf_evlist__delete(evsel_list);
2889         return status;
2890 }