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/string2.h"
  67 #include "util/metricgroup.h"
  68 #include "asm/bug.h"
  69
  70 #include <linux/time64.h>
  71 #include <api/fs/fs.h>
  72 #include <errno.h>
  73 #include <signal.h>
  74 #include <stdlib.h>
  75 #include <sys/prctl.h>
  76 #include <inttypes.h>
  77 #include <locale.h>
  78 #include <math.h>
  79 #include <sys/types.h>
  80 #include <sys/stat.h>
  81 #include <sys/wait.h>
  82 #include <unistd.h>
  83
  84 #include "sane_ctype.h"
  85
  86 #define DEFAULT_SEPARATOR       " "
  87 #define CNTR_NOT_SUPPORTED      "<not supported>"
  88 #define CNTR_NOT_COUNTED        "<not counted>"
  89 #define FREEZE_ON_SMI_PATH      "devices/cpu/freeze_on_smi"
  90
  91 static void print_counters(struct timespec *ts, int argc, const char **argv);
  92
  93 /* Default events used for perf stat -T */
  94 static const char *transaction_attrs = {
  95         "task-clock,"
  96         "{"
  97         "instructions,"
  98         "cycles,"
  99         "cpu/cycles-t/,"
 100         "cpu/tx-start/,"
 101         "cpu/el-start/,"
 102         "cpu/cycles-ct/"
 103         "}"
 104 };
 105
 106 /* More limited version when the CPU does not have all events. */
 107 static const char * transaction_limited_attrs = {
 108         "task-clock,"
 109         "{"
 110         "instructions,"
 111         "cycles,"
 112         "cpu/cycles-t/,"
 113         "cpu/tx-start/"
 114         "}"
 115 };
 116
 117 static const char * topdown_attrs[] = {
 118         "topdown-total-slots",
 119         "topdown-slots-retired",
 120         "topdown-recovery-bubbles",
 121         "topdown-fetch-bubbles",
 122         "topdown-slots-issued",
 123         NULL,
 124 };
 125
 126 static const char *smi_cost_attrs = {
 127         "{"
 128         "msr/aperf/,"
 129         "msr/smi/,"
 130         "cycles"
 131         "}"
 132 };
 133
 134 static struct perf_evlist       *evsel_list;
 135
 136 static struct rblist             metric_events;
 137
 138 static struct target target = {
 139         .uid    = UINT_MAX,
 140 };
 141
 142 typedef int (*aggr_get_id_t)(struct cpu_map *m, int cpu);
 143
 144 static int                      run_count                       =  1;
 145 static bool                     no_inherit                      = false;
 146 static volatile pid_t           child_pid                       = -1;
 147 static bool                     null_run                        =  false;
 148 static int                      detailed_run                    =  0;
 149 static bool                     transaction_run;
 150 static bool                     topdown_run                     = false;
 151 static bool                     smi_cost                        = false;
 152 static bool                     smi_reset                       = false;
 153 static bool                     big_num                         =  true;
 154 static int                      big_num_opt                     =  -1;
 155 static const char               *csv_sep                        = NULL;
 156 static bool                     csv_output                      = false;
 157 static bool                     group                           = false;
 158 static const char               *pre_cmd                        = NULL;
 159 static const char               *post_cmd                       = NULL;
 160 static bool                     sync_run                        = false;
 161 static unsigned int             initial_delay                   = 0;
 162 static unsigned int             unit_width                      = 4; /* strlen("unit") */
 163 static bool                     forever                         = false;
 164 static bool                     metric_only                     = false;
 165 static bool                     force_metric_only               = false;
 166 static bool                     no_merge                        = false;
 167 static struct timespec          ref_time;
 168 static struct cpu_map           *aggr_map;
 169 static aggr_get_id_t            aggr_get_id;
 170 static bool                     append_file;
 171 static const char               *output_name;
 172 static int                      output_fd;
 173 static int                      print_free_counters_hint;
 174
 175 struct perf_stat {
 176         bool                     record;
 177         struct perf_data         data;
 178         struct perf_session     *session;
 179         u64                      bytes_written;
 180         struct perf_tool         tool;
 181         bool                     maps_allocated;
 182         struct cpu_map          *cpus;
 183         struct thread_map       *threads;
 184         enum aggr_mode           aggr_mode;
 185 };
 186
 187 static struct perf_stat         perf_stat;
 188 #define STAT_RECORD             perf_stat.record
 189
 190 static volatile int done = 0;
 191
 192 static struct perf_stat_config stat_config = {
 193         .aggr_mode      = AGGR_GLOBAL,
 194         .scale          = true,
 195 };
 196
 197 static bool is_duration_time(struct perf_evsel *evsel)
 198 {
 199         return !strcmp(evsel->name, "duration_time");
 200 }
 201
 202 static inline void diff_timespec(struct timespec *r, struct timespec *a,
 203                                  struct timespec *b)
 204 {
 205         r->tv_sec = a->tv_sec - b->tv_sec;
 206         if (a->tv_nsec < b->tv_nsec) {
 207                 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
 208                 r->tv_sec--;
 209         } else {
 210                 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
 211         }
 212 }
 213
 214 static void perf_stat__reset_stats(void)
 215 {
 216         int i;
 217
 218         perf_evlist__reset_stats(evsel_list);
 219         perf_stat__reset_shadow_stats();
 220
 221         for (i = 0; i < stat_config.stats_num; i++)
 222                 perf_stat__reset_shadow_per_stat(&stat_config.stats[i]);
 223 }
 224
 225 static int create_perf_stat_counter(struct perf_evsel *evsel)
 226 {
 227         struct perf_event_attr *attr = &evsel->attr;
 228         struct perf_evsel *leader = evsel->leader;
 229
 230         if (stat_config.scale) {
 231                 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
 232                                     PERF_FORMAT_TOTAL_TIME_RUNNING;
 233         }
 234
 235         /*
 236          * The event is part of non trivial group, let's enable
 237          * the group read (for leader) and ID retrieval for all
 238          * members.
 239          */
 240         if (leader->nr_members > 1)
 241                 attr->read_format |= PERF_FORMAT_ID|PERF_FORMAT_GROUP;
 242
 243         attr->inherit = !no_inherit;
 244
 245         /*
 246          * Some events get initialized with sample_(period/type) set,
 247          * like tracepoints. Clear it up for counting.
 248          */
 249         attr->sample_period = 0;
 250
 251         /*
 252          * But set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
 253          * while avoiding that older tools show confusing messages.
 254          *
 255          * However for pipe sessions we need to keep it zero,
 256          * because script's perf_evsel__check_attr is triggered
 257          * by attr->sample_type != 0, and we can't run it on
 258          * stat sessions.
 259          */
 260         if (!(STAT_RECORD && perf_stat.data.is_pipe))
 261                 attr->sample_type = PERF_SAMPLE_IDENTIFIER;
 262
 263         /*
 264          * Disabling all counters initially, they will be enabled
 265          * either manually by us or by kernel via enable_on_exec
 266          * set later.
 267          */
 268         if (perf_evsel__is_group_leader(evsel)) {
 269                 attr->disabled = 1;
 270
 271                 /*
 272                  * In case of initial_delay we enable tracee
 273                  * events manually.
 274                  */
 275                 if (target__none(&target) && !initial_delay)
 276                         attr->enable_on_exec = 1;
 277         }
 278
 279         if (target__has_cpu(&target) && !target__has_per_thread(&target))
 280                 return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
 281
 282         return perf_evsel__open_per_thread(evsel, evsel_list->threads);
 283 }
 284
 285 /*
 286  * Does the counter have nsecs as a unit?
 287  */
 288 static inline int nsec_counter(struct perf_evsel *evsel)
 289 {
 290         if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
 291             perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 292                 return 1;
 293
 294         return 0;
 295 }
 296
 297 static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
 298                                      union perf_event *event,
 299                                      struct perf_sample *sample __maybe_unused,
 300                                      struct machine *machine __maybe_unused)
 301 {
 302         if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) {
 303                 pr_err("failed to write perf data, error: %m\n");
 304                 return -1;
 305         }
 306
 307         perf_stat.bytes_written += event->header.size;
 308         return 0;
 309 }
 310
 311 static int write_stat_round_event(u64 tm, u64 type)
 312 {
 313         return perf_event__synthesize_stat_round(NULL, tm, type,
 314                                                  process_synthesized_event,
 315                                                  NULL);
 316 }
 317
 318 #define WRITE_STAT_ROUND_EVENT(time, interval) \
 319         write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
 320
 321 #define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
 322
 323 static int
 324 perf_evsel__write_stat_event(struct perf_evsel *counter, u32 cpu, u32 thread,
 325                              struct perf_counts_values *count)
 326 {
 327         struct perf_sample_id *sid = SID(counter, cpu, thread);
 328
 329         return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
 330                                            process_synthesized_event, NULL);
 331 }
 332
 333 /*
 334  * Read out the results of a single counter:
 335  * do not aggregate counts across CPUs in system-wide mode
 336  */
 337 static int read_counter(struct perf_evsel *counter)
 338 {
 339         int nthreads = thread_map__nr(evsel_list->threads);
 340         int ncpus, cpu, thread;
 341
 342         if (target__has_cpu(&target) && !target__has_per_thread(&target))
 343                 ncpus = perf_evsel__nr_cpus(counter);
 344         else
 345                 ncpus = 1;
 346
 347         if (!counter->supported)
 348                 return -ENOENT;
 349
 350         if (counter->system_wide)
 351                 nthreads = 1;
 352
 353         for (thread = 0; thread < nthreads; thread++) {
 354                 for (cpu = 0; cpu < ncpus; cpu++) {
 355                         struct perf_counts_values *count;
 356
 357                         count = perf_counts(counter->counts, cpu, thread);
 358
 359                         /*
 360                          * The leader's group read loads data into its group members
 361                          * (via perf_evsel__read_counter) and sets threir count->loaded.
 362                          */
 363                         if (!count->loaded &&
 364                             perf_evsel__read_counter(counter, cpu, thread)) {
 365                                 counter->counts->scaled = -1;
 366                                 perf_counts(counter->counts, cpu, thread)->ena = 0;
 367                                 perf_counts(counter->counts, cpu, thread)->run = 0;
 368                                 return -1;
 369                         }
 370
 371                         count->loaded = false;
 372
 373                         if (STAT_RECORD) {
 374                                 if (perf_evsel__write_stat_event(counter, cpu, thread, count)) {
 375                                         pr_err("failed to write stat event\n");
 376                                         return -1;
 377                                 }
 378                         }
 379
 380                         if (verbose > 1) {
 381                                 fprintf(stat_config.output,
 382                                         "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 383                                                 perf_evsel__name(counter),
 384                                                 cpu,
 385                                                 count->val, count->ena, count->run);
 386                         }
 387                 }
 388         }
 389
 390         return 0;
 391 }
 392
 393 static void read_counters(void)
 394 {
 395         struct perf_evsel *counter;
 396         int ret;
 397
 398         evlist__for_each_entry(evsel_list, counter) {
 399                 ret = read_counter(counter);
 400                 if (ret)
 401                         pr_debug("failed to read counter %s\n", counter->name);
 402
 403                 if (ret == 0 && perf_stat_process_counter(&stat_config, counter))
 404                         pr_warning("failed to process counter %s\n", counter->name);
 405         }
 406 }
 407
 408 static void process_interval(void)
 409 {
 410         struct timespec ts, rs;
 411
 412         read_counters();
 413
 414         clock_gettime(CLOCK_MONOTONIC, &ts);
 415         diff_timespec(&rs, &ts, &ref_time);
 416
 417         if (STAT_RECORD) {
 418                 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
 419                         pr_err("failed to write stat round event\n");
 420         }
 421
 422         init_stats(&walltime_nsecs_stats);
 423         update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000);
 424         print_counters(&rs, 0, NULL);
 425 }
 426
 427 static void enable_counters(void)
 428 {
 429         if (initial_delay)
 430                 usleep(initial_delay * USEC_PER_MSEC);
 431
 432         /*
 433          * We need to enable counters only if:
 434          * - we don't have tracee (attaching to task or cpu)
 435          * - we have initial delay configured
 436          */
 437         if (!target__none(&target) || initial_delay)
 438                 perf_evlist__enable(evsel_list);
 439 }
 440
 441 static void disable_counters(void)
 442 {
 443         /*
 444          * If we don't have tracee (attaching to task or cpu), counters may
 445          * still be running. To get accurate group ratios, we must stop groups
 446          * from counting before reading their constituent counters.
 447          */
 448         if (!target__none(&target))
 449                 perf_evlist__disable(evsel_list);
 450 }
 451
 452 static volatile int workload_exec_errno;
 453
 454 /*
 455  * perf_evlist__prepare_workload will send a SIGUSR1
 456  * if the fork fails, since we asked by setting its
 457  * want_signal to true.
 458  */
 459 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
 460                                         void *ucontext __maybe_unused)
 461 {
 462         workload_exec_errno = info->si_value.sival_int;
 463 }
 464
 465 static int perf_stat_synthesize_config(bool is_pipe)
 466 {
 467         int err;
 468
 469         if (is_pipe) {
 470                 err = perf_event__synthesize_attrs(NULL, perf_stat.session,
 471                                                    process_synthesized_event);
 472                 if (err < 0) {
 473                         pr_err("Couldn't synthesize attrs.\n");
 474                         return err;
 475                 }
 476         }
 477
 478         err = perf_event__synthesize_extra_attr(NULL,
 479                                                 evsel_list,
 480                                                 process_synthesized_event,
 481                                                 is_pipe);
 482
 483         err = perf_event__synthesize_thread_map2(NULL, evsel_list->threads,
 484                                                 process_synthesized_event,
 485                                                 NULL);
 486         if (err < 0) {
 487                 pr_err("Couldn't synthesize thread map.\n");
 488                 return err;
 489         }
 490
 491         err = perf_event__synthesize_cpu_map(NULL, evsel_list->cpus,
 492                                              process_synthesized_event, NULL);
 493         if (err < 0) {
 494                 pr_err("Couldn't synthesize thread map.\n");
 495                 return err;
 496         }
 497
 498         err = perf_event__synthesize_stat_config(NULL, &stat_config,
 499                                                  process_synthesized_event, NULL);
 500         if (err < 0) {
 501                 pr_err("Couldn't synthesize config.\n");
 502                 return err;
 503         }
 504
 505         return 0;
 506 }
 507
 508 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
 509
 510 static int __store_counter_ids(struct perf_evsel *counter,
 511                                struct cpu_map *cpus,
 512                                struct thread_map *threads)
 513 {
 514         int cpu, thread;
 515
 516         for (cpu = 0; cpu < cpus->nr; cpu++) {
 517                 for (thread = 0; thread < threads->nr; thread++) {
 518                         int fd = FD(counter, cpu, thread);
 519
 520                         if (perf_evlist__id_add_fd(evsel_list, counter,
 521                                                    cpu, thread, fd) < 0)
 522                                 return -1;
 523                 }
 524         }
 525
 526         return 0;
 527 }
 528
 529 static int store_counter_ids(struct perf_evsel *counter)
 530 {
 531         struct cpu_map *cpus = counter->cpus;
 532         struct thread_map *threads = counter->threads;
 533
 534         if (perf_evsel__alloc_id(counter, cpus->nr, threads->nr))
 535                 return -ENOMEM;
 536
 537         return __store_counter_ids(counter, cpus, threads);
 538 }
 539
 540 static bool perf_evsel__should_store_id(struct perf_evsel *counter)
 541 {
 542         return STAT_RECORD || counter->attr.read_format & PERF_FORMAT_ID;
 543 }
 544
 545 static struct perf_evsel *perf_evsel__reset_weak_group(struct perf_evsel *evsel)
 546 {
 547         struct perf_evsel *c2, *leader;
 548         bool is_open = true;
 549
 550         leader = evsel->leader;
 551         pr_debug("Weak group for %s/%d failed\n",
 552                         leader->name, leader->nr_members);
 553
 554         /*
 555          * for_each_group_member doesn't work here because it doesn't
 556          * include the first entry.
 557          */
 558         evlist__for_each_entry(evsel_list, c2) {
 559                 if (c2 == evsel)
 560                         is_open = false;
 561                 if (c2->leader == leader) {
 562                         if (is_open)
 563                                 perf_evsel__close(c2);
 564                         c2->leader = c2;
 565                         c2->nr_members = 0;
 566                 }
 567         }
 568         return leader;
 569 }
 570
 571 static int __run_perf_stat(int argc, const char **argv)
 572 {
 573         int interval = stat_config.interval;
 574         char msg[BUFSIZ];
 575         unsigned long long t0, t1;
 576         struct perf_evsel *counter;
 577         struct timespec ts;
 578         size_t l;
 579         int status = 0;
 580         const bool forks = (argc > 0);
 581         bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false;
 582         struct perf_evsel_config_term *err_term;
 583
 584         if (interval) {
 585                 ts.tv_sec  = interval / USEC_PER_MSEC;
 586                 ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC;
 587         } else {
 588                 ts.tv_sec  = 1;
 589                 ts.tv_nsec = 0;
 590         }
 591
 592         if (forks) {
 593                 if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe,
 594                                                   workload_exec_failed_signal) < 0) {
 595                         perror("failed to prepare workload");
 596                         return -1;
 597                 }
 598                 child_pid = evsel_list->workload.pid;
 599         }
 600
 601         if (group)
 602                 perf_evlist__set_leader(evsel_list);
 603
 604         evlist__for_each_entry(evsel_list, counter) {
 605 try_again:
 606                 if (create_perf_stat_counter(counter) < 0) {
 607
 608                         /* Weak group failed. Reset the group. */
 609                         if ((errno == EINVAL || errno == EBADF) &&
 610                             counter->leader != counter &&
 611                             counter->weak_group) {
 612                                 counter = perf_evsel__reset_weak_group(counter);
 613                                 goto try_again;
 614                         }
 615
 616                         /*
 617                          * PPC returns ENXIO for HW counters until 2.6.37
 618                          * (behavior changed with commit b0a873e).
 619                          */
 620                         if (errno == EINVAL || errno == ENOSYS ||
 621                             errno == ENOENT || errno == EOPNOTSUPP ||
 622                             errno == ENXIO) {
 623                                 if (verbose > 0)
 624                                         ui__warning("%s event is not supported by the kernel.\n",
 625                                                     perf_evsel__name(counter));
 626                                 counter->supported = false;
 627
 628                                 if ((counter->leader != counter) ||
 629                                     !(counter->leader->nr_members > 1))
 630                                         continue;
 631                         } else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
 632                                 if (verbose > 0)
 633                                         ui__warning("%s\n", msg);
 634                                 goto try_again;
 635                         }
 636
 637                         perf_evsel__open_strerror(counter, &target,
 638                                                   errno, msg, sizeof(msg));
 639                         ui__error("%s\n", msg);
 640
 641                         if (child_pid != -1)
 642                                 kill(child_pid, SIGTERM);
 643
 644                         return -1;
 645                 }
 646                 counter->supported = true;
 647
 648                 l = strlen(counter->unit);
 649                 if (l > unit_width)
 650                         unit_width = l;
 651
 652                 if (perf_evsel__should_store_id(counter) &&
 653                     store_counter_ids(counter))
 654                         return -1;
 655         }
 656
 657         if (perf_evlist__apply_filters(evsel_list, &counter)) {
 658                 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
 659                         counter->filter, perf_evsel__name(counter), errno,
 660                         str_error_r(errno, msg, sizeof(msg)));
 661                 return -1;
 662         }
 663
 664         if (perf_evlist__apply_drv_configs(evsel_list, &counter, &err_term)) {
 665                 pr_err("failed to set config \"%s\" on event %s with %d (%s)\n",
 666                       err_term->val.drv_cfg, perf_evsel__name(counter), errno,
 667                       str_error_r(errno, msg, sizeof(msg)));
 668                 return -1;
 669         }
 670
 671         if (STAT_RECORD) {
 672                 int err, fd = perf_data__fd(&perf_stat.data);
 673
 674                 if (is_pipe) {
 675                         err = perf_header__write_pipe(perf_data__fd(&perf_stat.data));
 676                 } else {
 677                         err = perf_session__write_header(perf_stat.session, evsel_list,
 678                                                          fd, false);
 679                 }
 680
 681                 if (err < 0)
 682                         return err;
 683
 684                 err = perf_stat_synthesize_config(is_pipe);
 685                 if (err < 0)
 686                         return err;
 687         }
 688
 689         /*
 690          * Enable counters and exec the command:
 691          */
 692         t0 = rdclock();
 693         clock_gettime(CLOCK_MONOTONIC, &ref_time);
 694
 695         if (forks) {
 696                 perf_evlist__start_workload(evsel_list);
 697                 enable_counters();
 698
 699                 if (interval) {
 700                         while (!waitpid(child_pid, &status, WNOHANG)) {
 701                                 nanosleep(&ts, NULL);
 702                                 process_interval();
 703                         }
 704                 }
 705                 waitpid(child_pid, &status, 0);
 706
 707                 if (workload_exec_errno) {
 708                         const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
 709                         pr_err("Workload failed: %s\n", emsg);
 710                         return -1;
 711                 }
 712
 713                 if (WIFSIGNALED(status))
 714                         psignal(WTERMSIG(status), argv[0]);
 715         } else {
 716                 enable_counters();
 717                 while (!done) {
 718                         nanosleep(&ts, NULL);
 719                         if (interval)
 720                                 process_interval();
 721                 }
 722         }
 723
 724         disable_counters();
 725
 726         t1 = rdclock();
 727
 728         update_stats(&walltime_nsecs_stats, t1 - t0);
 729
 730         /*
 731          * Closing a group leader splits the group, and as we only disable
 732          * group leaders, results in remaining events becoming enabled. To
 733          * avoid arbitrary skew, we must read all counters before closing any
 734          * group leaders.
 735          */
 736         read_counters();
 737         perf_evlist__close(evsel_list);
 738
 739         return WEXITSTATUS(status);
 740 }
 741
 742 static int run_perf_stat(int argc, const char **argv)
 743 {
 744         int ret;
 745
 746         if (pre_cmd) {
 747                 ret = system(pre_cmd);
 748                 if (ret)
 749                         return ret;
 750         }
 751
 752         if (sync_run)
 753                 sync();
 754
 755         ret = __run_perf_stat(argc, argv);
 756         if (ret)
 757                 return ret;
 758
 759         if (post_cmd) {
 760                 ret = system(post_cmd);
 761                 if (ret)
 762                         return ret;
 763         }
 764
 765         return ret;
 766 }
 767
 768 static void print_running(u64 run, u64 ena)
 769 {
 770         if (csv_output) {
 771                 fprintf(stat_config.output, "%s%" PRIu64 "%s%.2f",
 772                                         csv_sep,
 773                                         run,
 774                                         csv_sep,
 775                                         ena ? 100.0 * run / ena : 100.0);
 776         } else if (run != ena) {
 777                 fprintf(stat_config.output, "  (%.2f%%)", 100.0 * run / ena);
 778         }
 779 }
 780
 781 static void print_noise_pct(double total, double avg)
 782 {
 783         double pct = rel_stddev_stats(total, avg);
 784
 785         if (csv_output)
 786                 fprintf(stat_config.output, "%s%.2f%%", csv_sep, pct);
 787         else if (pct)
 788                 fprintf(stat_config.output, "  ( +-%6.2f%% )", pct);
 789 }
 790
 791 static void print_noise(struct perf_evsel *evsel, double avg)
 792 {
 793         struct perf_stat_evsel *ps;
 794
 795         if (run_count == 1)
 796                 return;
 797
 798         ps = evsel->stats;
 799         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
 800 }
 801
 802 static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
 803 {
 804         switch (stat_config.aggr_mode) {
 805         case AGGR_CORE:
 806                 fprintf(stat_config.output, "S%d-C%*d%s%*d%s",
 807                         cpu_map__id_to_socket(id),
 808                         csv_output ? 0 : -8,
 809                         cpu_map__id_to_cpu(id),
 810                         csv_sep,
 811                         csv_output ? 0 : 4,
 812                         nr,
 813                         csv_sep);
 814                 break;
 815         case AGGR_SOCKET:
 816                 fprintf(stat_config.output, "S%*d%s%*d%s",
 817                         csv_output ? 0 : -5,
 818                         id,
 819                         csv_sep,
 820                         csv_output ? 0 : 4,
 821                         nr,
 822                         csv_sep);
 823                         break;
 824         case AGGR_NONE:
 825                 fprintf(stat_config.output, "CPU%*d%s",
 826                         csv_output ? 0 : -4,
 827                         perf_evsel__cpus(evsel)->map[id], csv_sep);
 828                 break;
 829         case AGGR_THREAD:
 830                 fprintf(stat_config.output, "%*s-%*d%s",
 831                         csv_output ? 0 : 16,
 832                         thread_map__comm(evsel->threads, id),
 833                         csv_output ? 0 : -8,
 834                         thread_map__pid(evsel->threads, id),
 835                         csv_sep);
 836                 break;
 837         case AGGR_GLOBAL:
 838         case AGGR_UNSET:
 839         default:
 840                 break;
 841         }
 842 }
 843
 844 struct outstate {
 845         FILE *fh;
 846         bool newline;
 847         const char *prefix;
 848         int  nfields;
 849         int  id, nr;
 850         struct perf_evsel *evsel;
 851 };
 852
 853 #define METRIC_LEN  35
 854
 855 static void new_line_std(void *ctx)
 856 {
 857         struct outstate *os = ctx;
 858
 859         os->newline = true;
 860 }
 861
 862 static void do_new_line_std(struct outstate *os)
 863 {
 864         fputc('\n', os->fh);
 865         fputs(os->prefix, os->fh);
 866         aggr_printout(os->evsel, os->id, os->nr);
 867         if (stat_config.aggr_mode == AGGR_NONE)
 868                 fprintf(os->fh, "        ");
 869         fprintf(os->fh, "                                                 ");
 870 }
 871
 872 static void print_metric_std(void *ctx, const char *color, const char *fmt,
 873                              const char *unit, double val)
 874 {
 875         struct outstate *os = ctx;
 876         FILE *out = os->fh;
 877         int n;
 878         bool newline = os->newline;
 879
 880         os->newline = false;
 881
 882         if (unit == NULL || fmt == NULL) {
 883                 fprintf(out, "%-*s", METRIC_LEN, "");
 884                 return;
 885         }
 886
 887         if (newline)
 888                 do_new_line_std(os);
 889
 890         n = fprintf(out, " # ");
 891         if (color)
 892                 n += color_fprintf(out, color, fmt, val);
 893         else
 894                 n += fprintf(out, fmt, val);
 895         fprintf(out, " %-*s", METRIC_LEN - n - 1, unit);
 896 }
 897
 898 static void new_line_csv(void *ctx)
 899 {
 900         struct outstate *os = ctx;
 901         int i;
 902
 903         fputc('\n', os->fh);
 904         if (os->prefix)
 905                 fprintf(os->fh, "%s%s", os->prefix, csv_sep);
 906         aggr_printout(os->evsel, os->id, os->nr);
 907         for (i = 0; i < os->nfields; i++)
 908                 fputs(csv_sep, os->fh);
 909 }
 910
 911 static void print_metric_csv(void *ctx,
 912                              const char *color __maybe_unused,
 913                              const char *fmt, const char *unit, double val)
 914 {
 915         struct outstate *os = ctx;
 916         FILE *out = os->fh;
 917         char buf[64], *vals, *ends;
 918
 919         if (unit == NULL || fmt == NULL) {
 920                 fprintf(out, "%s%s", csv_sep, csv_sep);
 921                 return;
 922         }
 923         snprintf(buf, sizeof(buf), fmt, val);
 924         ends = vals = ltrim(buf);
 925         while (isdigit(*ends) || *ends == '.')
 926                 ends++;
 927         *ends = 0;
 928         while (isspace(*unit))
 929                 unit++;
 930         fprintf(out, "%s%s%s%s", csv_sep, vals, csv_sep, unit);
 931 }
 932
 933 #define METRIC_ONLY_LEN 20
 934
 935 /* Filter out some columns that don't work well in metrics only mode */
 936
 937 static bool valid_only_metric(const char *unit)
 938 {
 939         if (!unit)
 940                 return false;
 941         if (strstr(unit, "/sec") ||
 942             strstr(unit, "hz") ||
 943             strstr(unit, "Hz") ||
 944             strstr(unit, "CPUs utilized"))
 945                 return false;
 946         return true;
 947 }
 948
 949 static const char *fixunit(char *buf, struct perf_evsel *evsel,
 950                            const char *unit)
 951 {
 952         if (!strncmp(unit, "of all", 6)) {
 953                 snprintf(buf, 1024, "%s %s", perf_evsel__name(evsel),
 954                          unit);
 955                 return buf;
 956         }
 957         return unit;
 958 }
 959
 960 static void print_metric_only(void *ctx, const char *color, const char *fmt,
 961                               const char *unit, double val)
 962 {
 963         struct outstate *os = ctx;
 964         FILE *out = os->fh;
 965         int n;
 966         char buf[1024];
 967         unsigned mlen = METRIC_ONLY_LEN;
 968
 969         if (!valid_only_metric(unit))
 970                 return;
 971         unit = fixunit(buf, os->evsel, unit);
 972         if (color)
 973                 n = color_fprintf(out, color, fmt, val);
 974         else
 975                 n = fprintf(out, fmt, val);
 976         if (n > METRIC_ONLY_LEN)
 977                 n = METRIC_ONLY_LEN;
 978         if (mlen < strlen(unit))
 979                 mlen = strlen(unit) + 1;
 980         fprintf(out, "%*s", mlen - n, "");
 981 }
 982
 983 static void print_metric_only_csv(void *ctx, const char *color __maybe_unused,
 984                                   const char *fmt,
 985                                   const char *unit, double val)
 986 {
 987         struct outstate *os = ctx;
 988         FILE *out = os->fh;
 989         char buf[64], *vals, *ends;
 990         char tbuf[1024];
 991
 992         if (!valid_only_metric(unit))
 993                 return;
 994         unit = fixunit(tbuf, os->evsel, unit);
 995         snprintf(buf, sizeof buf, fmt, val);
 996         ends = vals = ltrim(buf);
 997         while (isdigit(*ends) || *ends == '.')
 998                 ends++;
 999         *ends = 0;
1000         fprintf(out, "%s%s", vals, csv_sep);
1001 }
1002
1003 static void new_line_metric(void *ctx __maybe_unused)
1004 {
1005 }
1006
1007 static void print_metric_header(void *ctx, const char *color __maybe_unused,
1008                                 const char *fmt __maybe_unused,
1009                                 const char *unit, double val __maybe_unused)
1010 {
1011         struct outstate *os = ctx;
1012         char tbuf[1024];
1013
1014         if (!valid_only_metric(unit))
1015                 return;
1016         unit = fixunit(tbuf, os->evsel, unit);
1017         if (csv_output)
1018                 fprintf(os->fh, "%s%s", unit, csv_sep);
1019         else
1020                 fprintf(os->fh, "%-*s ", METRIC_ONLY_LEN, unit);
1021 }
1022
1023 static void nsec_printout(int id, int nr, struct perf_evsel *evsel, double avg)
1024 {
1025         FILE *output = stat_config.output;
1026         double msecs = avg / NSEC_PER_MSEC;
1027         const char *fmt_v, *fmt_n;
1028         char name[25];
1029
1030         fmt_v = csv_output ? "%.6f%s" : "%18.6f%s";
1031         fmt_n = csv_output ? "%s" : "%-25s";
1032
1033         aggr_printout(evsel, id, nr);
1034
1035         scnprintf(name, sizeof(name), "%s%s",
1036                   perf_evsel__name(evsel), csv_output ? "" : " (msec)");
1037
1038         fprintf(output, fmt_v, msecs, csv_sep);
1039
1040         if (csv_output)
1041                 fprintf(output, "%s%s", evsel->unit, csv_sep);
1042         else
1043                 fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep);
1044
1045         fprintf(output, fmt_n, name);
1046
1047         if (evsel->cgrp)
1048                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
1049 }
1050
1051 static int first_shadow_cpu(struct perf_evsel *evsel, int id)
1052 {
1053         int i;
1054
1055         if (!aggr_get_id)
1056                 return 0;
1057
1058         if (stat_config.aggr_mode == AGGR_NONE)
1059                 return id;
1060
1061         if (stat_config.aggr_mode == AGGR_GLOBAL)
1062                 return 0;
1063
1064         for (i = 0; i < perf_evsel__nr_cpus(evsel); i++) {
1065                 int cpu2 = perf_evsel__cpus(evsel)->map[i];
1066
1067                 if (aggr_get_id(evsel_list->cpus, cpu2) == id)
1068                         return cpu2;
1069         }
1070         return 0;
1071 }
1072
1073 static void abs_printout(int id, int nr, struct perf_evsel *evsel, double avg)
1074 {
1075         FILE *output = stat_config.output;
1076         double sc =  evsel->scale;
1077         const char *fmt;
1078
1079         if (csv_output) {
1080                 fmt = floor(sc) != sc ?  "%.2f%s" : "%.0f%s";
1081         } else {
1082                 if (big_num)
1083                         fmt = floor(sc) != sc ? "%'18.2f%s" : "%'18.0f%s";
1084                 else
1085                         fmt = floor(sc) != sc ? "%18.2f%s" : "%18.0f%s";
1086         }
1087
1088         aggr_printout(evsel, id, nr);
1089
1090         fprintf(output, fmt, avg, csv_sep);
1091
1092         if (evsel->unit)
1093                 fprintf(output, "%-*s%s",
1094                         csv_output ? 0 : unit_width,
1095                         evsel->unit, csv_sep);
1096
1097         fprintf(output, "%-*s", csv_output ? 0 : 25, perf_evsel__name(evsel));
1098
1099         if (evsel->cgrp)
1100                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
1101 }
1102
1103 static void printout(int id, int nr, struct perf_evsel *counter, double uval,
1104                      char *prefix, u64 run, u64 ena, double noise,
1105                      struct runtime_stat *st)
1106 {
1107         struct perf_stat_output_ctx out;
1108         struct outstate os = {
1109                 .fh = stat_config.output,
1110                 .prefix = prefix ? prefix : "",
1111                 .id = id,
1112                 .nr = nr,
1113                 .evsel = counter,
1114         };
1115         print_metric_t pm = print_metric_std;
1116         void (*nl)(void *);
1117
1118         if (metric_only) {
1119                 nl = new_line_metric;
1120                 if (csv_output)
1121                         pm = print_metric_only_csv;
1122                 else
1123                         pm = print_metric_only;
1124         } else
1125                 nl = new_line_std;
1126
1127         if (csv_output && !metric_only) {
1128                 static int aggr_fields[] = {
1129                         [AGGR_GLOBAL] = 0,
1130                         [AGGR_THREAD] = 1,
1131                         [AGGR_NONE] = 1,
1132                         [AGGR_SOCKET] = 2,
1133                         [AGGR_CORE] = 2,
1134                 };
1135
1136                 pm = print_metric_csv;
1137                 nl = new_line_csv;
1138                 os.nfields = 3;
1139                 os.nfields += aggr_fields[stat_config.aggr_mode];
1140                 if (counter->cgrp)
1141                         os.nfields++;
1142         }
1143         if (run == 0 || ena == 0 || counter->counts->scaled == -1) {
1144                 if (metric_only) {
1145                         pm(&os, NULL, "", "", 0);
1146                         return;
1147                 }
1148                 aggr_printout(counter, id, nr);
1149
1150                 fprintf(stat_config.output, "%*s%s",
1151                         csv_output ? 0 : 18,
1152                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1153                         csv_sep);
1154
1155                 if (counter->supported)
1156                         print_free_counters_hint = 1;
1157
1158                 fprintf(stat_config.output, "%-*s%s",
1159                         csv_output ? 0 : unit_width,
1160                         counter->unit, csv_sep);
1161
1162                 fprintf(stat_config.output, "%*s",
1163                         csv_output ? 0 : -25,
1164                         perf_evsel__name(counter));
1165
1166                 if (counter->cgrp)
1167                         fprintf(stat_config.output, "%s%s",
1168                                 csv_sep, counter->cgrp->name);
1169
1170                 if (!csv_output)
1171                         pm(&os, NULL, NULL, "", 0);
1172                 print_noise(counter, noise);
1173                 print_running(run, ena);
1174                 if (csv_output)
1175                         pm(&os, NULL, NULL, "", 0);
1176                 return;
1177         }
1178
1179         if (metric_only)
1180                 /* nothing */;
1181         else if (nsec_counter(counter))
1182                 nsec_printout(id, nr, counter, uval);
1183         else
1184                 abs_printout(id, nr, counter, uval);
1185
1186         out.print_metric = pm;
1187         out.new_line = nl;
1188         out.ctx = &os;
1189         out.force_header = false;
1190
1191         if (csv_output && !metric_only) {
1192                 print_noise(counter, noise);
1193                 print_running(run, ena);
1194         }
1195
1196         perf_stat__print_shadow_stats(counter, uval,
1197                                 first_shadow_cpu(counter, id),
1198                                 &out, &metric_events, st);
1199         if (!csv_output && !metric_only) {
1200                 print_noise(counter, noise);
1201                 print_running(run, ena);
1202         }
1203 }
1204
1205 static void aggr_update_shadow(void)
1206 {
1207         int cpu, s2, id, s;
1208         u64 val;
1209         struct perf_evsel *counter;
1210
1211         for (s = 0; s < aggr_map->nr; s++) {
1212                 id = aggr_map->map[s];
1213                 evlist__for_each_entry(evsel_list, counter) {
1214                         val = 0;
1215                         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1216                                 s2 = aggr_get_id(evsel_list->cpus, cpu);
1217                                 if (s2 != id)
1218                                         continue;
1219                                 val += perf_counts(counter->counts, cpu, 0)->val;
1220                         }
1221                         perf_stat__update_shadow_stats(counter, val,
1222                                         first_shadow_cpu(counter, id),
1223                                         &rt_stat);
1224                 }
1225         }
1226 }
1227
1228 static void collect_all_aliases(struct perf_evsel *counter,
1229                             void (*cb)(struct perf_evsel *counter, void *data,
1230                                        bool first),
1231                             void *data)
1232 {
1233         struct perf_evsel *alias;
1234
1235         alias = list_prepare_entry(counter, &(evsel_list->entries), node);
1236         list_for_each_entry_continue (alias, &evsel_list->entries, node) {
1237                 if (strcmp(perf_evsel__name(alias), perf_evsel__name(counter)) ||
1238                     alias->scale != counter->scale ||
1239                     alias->cgrp != counter->cgrp ||
1240                     strcmp(alias->unit, counter->unit) ||
1241                     nsec_counter(alias) != nsec_counter(counter))
1242                         break;
1243                 alias->merged_stat = true;
1244                 cb(alias, data, false);
1245         }
1246 }
1247
1248 static bool collect_data(struct perf_evsel *counter,
1249                             void (*cb)(struct perf_evsel *counter, void *data,
1250                                        bool first),
1251                             void *data)
1252 {
1253         if (counter->merged_stat)
1254                 return false;
1255         cb(counter, data, true);
1256         if (!no_merge && counter->auto_merge_stats)
1257                 collect_all_aliases(counter, cb, data);
1258         return true;
1259 }
1260
1261 struct aggr_data {
1262         u64 ena, run, val;
1263         int id;
1264         int nr;
1265         int cpu;
1266 };
1267
1268 static void aggr_cb(struct perf_evsel *counter, void *data, bool first)
1269 {
1270         struct aggr_data *ad = data;
1271         int cpu, s2;
1272
1273         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1274                 struct perf_counts_values *counts;
1275
1276                 s2 = aggr_get_id(perf_evsel__cpus(counter), cpu);
1277                 if (s2 != ad->id)
1278                         continue;
1279                 if (first)
1280                         ad->nr++;
1281                 counts = perf_counts(counter->counts, cpu, 0);
1282                 /*
1283                  * When any result is bad, make them all to give
1284                  * consistent output in interval mode.
1285                  */
1286                 if (counts->ena == 0 || counts->run == 0 ||
1287                     counter->counts->scaled == -1) {
1288                         ad->ena = 0;
1289                         ad->run = 0;
1290                         break;
1291                 }
1292                 ad->val += counts->val;
1293                 ad->ena += counts->ena;
1294                 ad->run += counts->run;
1295         }
1296 }
1297
1298 static void print_aggr(char *prefix)
1299 {
1300         FILE *output = stat_config.output;
1301         struct perf_evsel *counter;
1302         int s, id, nr;
1303         double uval;
1304         u64 ena, run, val;
1305         bool first;
1306
1307         if (!(aggr_map || aggr_get_id))
1308                 return;
1309
1310         aggr_update_shadow();
1311
1312         /*
1313          * With metric_only everything is on a single line.
1314          * Without each counter has its own line.
1315          */
1316         for (s = 0; s < aggr_map->nr; s++) {
1317                 struct aggr_data ad;
1318                 if (prefix && metric_only)
1319                         fprintf(output, "%s", prefix);
1320
1321                 ad.id = id = aggr_map->map[s];
1322                 first = true;
1323                 evlist__for_each_entry(evsel_list, counter) {
1324                         if (is_duration_time(counter))
1325                                 continue;
1326
1327                         ad.val = ad.ena = ad.run = 0;
1328                         ad.nr = 0;
1329                         if (!collect_data(counter, aggr_cb, &ad))
1330                                 continue;
1331                         nr = ad.nr;
1332                         ena = ad.ena;
1333                         run = ad.run;
1334                         val = ad.val;
1335                         if (first && metric_only) {
1336                                 first = false;
1337                                 aggr_printout(counter, id, nr);
1338                         }
1339                         if (prefix && !metric_only)
1340                                 fprintf(output, "%s", prefix);
1341
1342                         uval = val * counter->scale;
1343                         printout(id, nr, counter, uval, prefix, run, ena, 1.0,
1344                                  &rt_stat);
1345                         if (!metric_only)
1346                                 fputc('\n', output);
1347                 }
1348                 if (metric_only)
1349                         fputc('\n', output);
1350         }
1351 }
1352
1353 static int cmp_val(const void *a, const void *b)
1354 {
1355         return ((struct perf_aggr_thread_value *)b)->val -
1356                 ((struct perf_aggr_thread_value *)a)->val;
1357 }
1358
1359 static struct perf_aggr_thread_value *sort_aggr_thread(
1360                                         struct perf_evsel *counter,
1361                                         int nthreads, int ncpus,
1362                                         int *ret)
1363 {
1364         int cpu, thread, i = 0;
1365         double uval;
1366         struct perf_aggr_thread_value *buf;
1367
1368         buf = calloc(nthreads, sizeof(struct perf_aggr_thread_value));
1369         if (!buf)
1370                 return NULL;
1371
1372         for (thread = 0; thread < nthreads; thread++) {
1373                 u64 ena = 0, run = 0, val = 0;
1374
1375                 for (cpu = 0; cpu < ncpus; cpu++) {
1376                         val += perf_counts(counter->counts, cpu, thread)->val;
1377                         ena += perf_counts(counter->counts, cpu, thread)->ena;
1378                         run += perf_counts(counter->counts, cpu, thread)->run;
1379                 }
1380
1381                 uval = val * counter->scale;
1382
1383                 /*
1384                  * Skip value 0 when enabling --per-thread globally,
1385                  * otherwise too many 0 output.
1386                  */
1387                 if (uval == 0.0 && target__has_per_thread(&target))
1388                         continue;
1389
1390                 buf[i].counter = counter;
1391                 buf[i].id = thread;
1392                 buf[i].uval = uval;
1393                 buf[i].val = val;
1394                 buf[i].run = run;
1395                 buf[i].ena = ena;
1396                 i++;
1397         }
1398
1399         qsort(buf, i, sizeof(struct perf_aggr_thread_value), cmp_val);
1400
1401         if (ret)
1402                 *ret = i;
1403
1404         return buf;
1405 }
1406
1407 static void print_aggr_thread(struct perf_evsel *counter, char *prefix)
1408 {
1409         FILE *output = stat_config.output;
1410         int nthreads = thread_map__nr(counter->threads);
1411         int ncpus = cpu_map__nr(counter->cpus);
1412         int thread, sorted_threads, id;
1413         struct perf_aggr_thread_value *buf;
1414
1415         buf = sort_aggr_thread(counter, nthreads, ncpus, &sorted_threads);
1416         if (!buf) {
1417                 perror("cannot sort aggr thread");
1418                 return;
1419         }
1420
1421         for (thread = 0; thread < sorted_threads; thread++) {
1422                 if (prefix)
1423                         fprintf(output, "%s", prefix);
1424
1425                 id = buf[thread].id;
1426                 if (stat_config.stats)
1427                         printout(id, 0, buf[thread].counter, buf[thread].uval,
1428                                  prefix, buf[thread].run, buf[thread].ena, 1.0,
1429                                  &stat_config.stats[id]);
1430                 else
1431                         printout(id, 0, buf[thread].counter, buf[thread].uval,
1432                                  prefix, buf[thread].run, buf[thread].ena, 1.0,
1433                                  &rt_stat);
1434                 fputc('\n', output);
1435         }
1436
1437         free(buf);
1438 }
1439
1440 struct caggr_data {
1441         double avg, avg_enabled, avg_running;
1442 };
1443
1444 static void counter_aggr_cb(struct perf_evsel *counter, void *data,
1445                             bool first __maybe_unused)
1446 {
1447         struct caggr_data *cd = data;
1448         struct perf_stat_evsel *ps = counter->stats;
1449
1450         cd->avg += avg_stats(&ps->res_stats[0]);
1451         cd->avg_enabled += avg_stats(&ps->res_stats[1]);
1452         cd->avg_running += avg_stats(&ps->res_stats[2]);
1453 }
1454
1455 /*
1456  * Print out the results of a single counter:
1457  * aggregated counts in system-wide mode
1458  */
1459 static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
1460 {
1461         FILE *output = stat_config.output;
1462         double uval;
1463         struct caggr_data cd = { .avg = 0.0 };
1464
1465         if (!collect_data(counter, counter_aggr_cb, &cd))
1466                 return;
1467
1468         if (prefix && !metric_only)
1469                 fprintf(output, "%s", prefix);
1470
1471         uval = cd.avg * counter->scale;
1472         printout(-1, 0, counter, uval, prefix, cd.avg_running, cd.avg_enabled,
1473                  cd.avg, &rt_stat);
1474         if (!metric_only)
1475                 fprintf(output, "\n");
1476 }
1477
1478 static void counter_cb(struct perf_evsel *counter, void *data,
1479                        bool first __maybe_unused)
1480 {
1481         struct aggr_data *ad = data;
1482
1483         ad->val += perf_counts(counter->counts, ad->cpu, 0)->val;
1484         ad->ena += perf_counts(counter->counts, ad->cpu, 0)->ena;
1485         ad->run += perf_counts(counter->counts, ad->cpu, 0)->run;
1486 }
1487
1488 /*
1489  * Print out the results of a single counter:
1490  * does not use aggregated count in system-wide
1491  */
1492 static void print_counter(struct perf_evsel *counter, char *prefix)
1493 {
1494         FILE *output = stat_config.output;
1495         u64 ena, run, val;
1496         double uval;
1497         int cpu;
1498
1499         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1500                 struct aggr_data ad = { .cpu = cpu };
1501
1502                 if (!collect_data(counter, counter_cb, &ad))
1503                         return;
1504                 val = ad.val;
1505                 ena = ad.ena;
1506                 run = ad.run;
1507
1508                 if (prefix)
1509                         fprintf(output, "%s", prefix);
1510
1511                 uval = val * counter->scale;
1512                 printout(cpu, 0, counter, uval, prefix, run, ena, 1.0,
1513                          &rt_stat);
1514
1515                 fputc('\n', output);
1516         }
1517 }
1518
1519 static void print_no_aggr_metric(char *prefix)
1520 {
1521         int cpu;
1522         int nrcpus = 0;
1523         struct perf_evsel *counter;
1524         u64 ena, run, val;
1525         double uval;
1526
1527         nrcpus = evsel_list->cpus->nr;
1528         for (cpu = 0; cpu < nrcpus; cpu++) {
1529                 bool first = true;
1530
1531                 if (prefix)
1532                         fputs(prefix, stat_config.output);
1533                 evlist__for_each_entry(evsel_list, counter) {
1534                         if (is_duration_time(counter))
1535                                 continue;
1536                         if (first) {
1537                                 aggr_printout(counter, cpu, 0);
1538                                 first = false;
1539                         }
1540                         val = perf_counts(counter->counts, cpu, 0)->val;
1541                         ena = perf_counts(counter->counts, cpu, 0)->ena;
1542                         run = perf_counts(counter->counts, cpu, 0)->run;
1543
1544                         uval = val * counter->scale;
1545                         printout(cpu, 0, counter, uval, prefix, run, ena, 1.0,
1546                                  &rt_stat);
1547                 }
1548                 fputc('\n', stat_config.output);
1549         }
1550 }
1551
1552 static int aggr_header_lens[] = {
1553         [AGGR_CORE] = 18,
1554         [AGGR_SOCKET] = 12,
1555         [AGGR_NONE] = 6,
1556         [AGGR_THREAD] = 24,
1557         [AGGR_GLOBAL] = 0,
1558 };
1559
1560 static const char *aggr_header_csv[] = {
1561         [AGGR_CORE]     =       "core,cpus,",
1562         [AGGR_SOCKET]   =       "socket,cpus",
1563         [AGGR_NONE]     =       "cpu,",
1564         [AGGR_THREAD]   =       "comm-pid,",
1565         [AGGR_GLOBAL]   =       ""
1566 };
1567
1568 static void print_metric_headers(const char *prefix, bool no_indent)
1569 {
1570         struct perf_stat_output_ctx out;
1571         struct perf_evsel *counter;
1572         struct outstate os = {
1573                 .fh = stat_config.output
1574         };
1575
1576         if (prefix)
1577                 fprintf(stat_config.output, "%s", prefix);
1578
1579         if (!csv_output && !no_indent)
1580                 fprintf(stat_config.output, "%*s",
1581                         aggr_header_lens[stat_config.aggr_mode], "");
1582         if (csv_output) {
1583                 if (stat_config.interval)
1584                         fputs("time,", stat_config.output);
1585                 fputs(aggr_header_csv[stat_config.aggr_mode],
1586                         stat_config.output);
1587         }
1588
1589         /* Print metrics headers only */
1590         evlist__for_each_entry(evsel_list, counter) {
1591                 if (is_duration_time(counter))
1592                         continue;
1593                 os.evsel = counter;
1594                 out.ctx = &os;
1595                 out.print_metric = print_metric_header;
1596                 out.new_line = new_line_metric;
1597                 out.force_header = true;
1598                 os.evsel = counter;
1599                 perf_stat__print_shadow_stats(counter, 0,
1600                                               0,
1601                                               &out,
1602                                               &metric_events,
1603                                               &rt_stat);
1604         }
1605         fputc('\n', stat_config.output);
1606 }
1607
1608 static void print_interval(char *prefix, struct timespec *ts)
1609 {
1610         FILE *output = stat_config.output;
1611         static int num_print_interval;
1612
1613         sprintf(prefix, "%6lu.%09lu%s", ts->tv_sec, ts->tv_nsec, csv_sep);
1614
1615         if (num_print_interval == 0 && !csv_output) {
1616                 switch (stat_config.aggr_mode) {
1617                 case AGGR_SOCKET:
1618                         fprintf(output, "#           time socket cpus");
1619                         if (!metric_only)
1620                                 fprintf(output, "             counts %*s events\n", unit_width, "unit");
1621                         break;
1622                 case AGGR_CORE:
1623                         fprintf(output, "#           time core         cpus");
1624                         if (!metric_only)
1625                                 fprintf(output, "             counts %*s events\n", unit_width, "unit");
1626                         break;
1627                 case AGGR_NONE:
1628                         fprintf(output, "#           time CPU");
1629                         if (!metric_only)
1630                                 fprintf(output, "                counts %*s events\n", unit_width, "unit");
1631                         break;
1632                 case AGGR_THREAD:
1633                         fprintf(output, "#           time             comm-pid");
1634                         if (!metric_only)
1635                                 fprintf(output, "                  counts %*s events\n", unit_width, "unit");
1636                         break;
1637                 case AGGR_GLOBAL:
1638                 default:
1639                         fprintf(output, "#           time");
1640                         if (!metric_only)
1641                                 fprintf(output, "             counts %*s events\n", unit_width, "unit");
1642                 case AGGR_UNSET:
1643                         break;
1644                 }
1645         }
1646
1647         if (num_print_interval == 0 && metric_only)
1648                 print_metric_headers(" ", true);
1649         if (++num_print_interval == 25)
1650                 num_print_interval = 0;
1651 }
1652
1653 static void print_header(int argc, const char **argv)
1654 {
1655         FILE *output = stat_config.output;
1656         int i;
1657
1658         fflush(stdout);
1659
1660         if (!csv_output) {
1661                 fprintf(output, "\n");
1662                 fprintf(output, " Performance counter stats for ");
1663                 if (target.system_wide)
1664                         fprintf(output, "\'system wide");
1665                 else if (target.cpu_list)
1666                         fprintf(output, "\'CPU(s) %s", target.cpu_list);
1667                 else if (!target__has_task(&target)) {
1668                         fprintf(output, "\'%s", argv ? argv[0] : "pipe");
1669                         for (i = 1; argv && (i < argc); i++)
1670                                 fprintf(output, " %s", argv[i]);
1671                 } else if (target.pid)
1672                         fprintf(output, "process id \'%s", target.pid);
1673                 else
1674                         fprintf(output, "thread id \'%s", target.tid);
1675
1676                 fprintf(output, "\'");
1677                 if (run_count > 1)
1678                         fprintf(output, " (%d runs)", run_count);
1679                 fprintf(output, ":\n\n");
1680         }
1681 }
1682
1683 static void print_footer(void)
1684 {
1685         FILE *output = stat_config.output;
1686         int n;
1687
1688         if (!null_run)
1689                 fprintf(output, "\n");
1690         fprintf(output, " %17.9f seconds time elapsed",
1691                         avg_stats(&walltime_nsecs_stats) / NSEC_PER_SEC);
1692         if (run_count > 1) {
1693                 fprintf(output, "                                        ");
1694                 print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1695                                 avg_stats(&walltime_nsecs_stats));
1696         }
1697         fprintf(output, "\n\n");
1698
1699         if (print_free_counters_hint &&
1700             sysctl__read_int("kernel/nmi_watchdog", &n) >= 0 &&
1701             n > 0)
1702                 fprintf(output,
1703 "Some events weren't counted. Try disabling the NMI watchdog:\n"
1704 "       echo 0 > /proc/sys/kernel/nmi_watchdog\n"
1705 "       perf stat ...\n"
1706 "       echo 1 > /proc/sys/kernel/nmi_watchdog\n");
1707 }
1708
1709 static void print_counters(struct timespec *ts, int argc, const char **argv)
1710 {
1711         int interval = stat_config.interval;
1712         struct perf_evsel *counter;
1713         char buf[64], *prefix = NULL;
1714
1715         /* Do not print anything if we record to the pipe. */
1716         if (STAT_RECORD && perf_stat.data.is_pipe)
1717                 return;
1718
1719         if (interval)
1720                 print_interval(prefix = buf, ts);
1721         else
1722                 print_header(argc, argv);
1723
1724         if (metric_only) {
1725                 static int num_print_iv;
1726
1727                 if (num_print_iv == 0 && !interval)
1728                         print_metric_headers(prefix, false);
1729                 if (num_print_iv++ == 25)
1730                         num_print_iv = 0;
1731                 if (stat_config.aggr_mode == AGGR_GLOBAL && prefix)
1732                         fprintf(stat_config.output, "%s", prefix);
1733         }
1734
1735         switch (stat_config.aggr_mode) {
1736         case AGGR_CORE:
1737         case AGGR_SOCKET:
1738                 print_aggr(prefix);
1739                 break;
1740         case AGGR_THREAD:
1741                 evlist__for_each_entry(evsel_list, counter) {
1742                         if (is_duration_time(counter))
1743                                 continue;
1744                         print_aggr_thread(counter, prefix);
1745                 }
1746                 break;
1747         case AGGR_GLOBAL:
1748                 evlist__for_each_entry(evsel_list, counter) {
1749                         if (is_duration_time(counter))
1750                                 continue;
1751                         print_counter_aggr(counter, prefix);
1752                 }
1753                 if (metric_only)
1754                         fputc('\n', stat_config.output);
1755                 break;
1756         case AGGR_NONE:
1757                 if (metric_only)
1758                         print_no_aggr_metric(prefix);
1759                 else {
1760                         evlist__for_each_entry(evsel_list, counter) {
1761                                 if (is_duration_time(counter))
1762                                         continue;
1763                                 print_counter(counter, prefix);
1764                         }
1765                 }
1766                 break;
1767         case AGGR_UNSET:
1768         default:
1769                 break;
1770         }
1771
1772         if (!interval && !csv_output)
1773                 print_footer();
1774
1775         fflush(stat_config.output);
1776 }
1777
1778 static volatile int signr = -1;
1779
1780 static void skip_signal(int signo)
1781 {
1782         if ((child_pid == -1) || stat_config.interval)
1783                 done = 1;
1784
1785         signr = signo;
1786         /*
1787          * render child_pid harmless
1788          * won't send SIGTERM to a random
1789          * process in case of race condition
1790          * and fast PID recycling
1791          */
1792         child_pid = -1;
1793 }
1794
1795 static void sig_atexit(void)
1796 {
1797         sigset_t set, oset;
1798
1799         /*
1800          * avoid race condition with SIGCHLD handler
1801          * in skip_signal() which is modifying child_pid
1802          * goal is to avoid send SIGTERM to a random
1803          * process
1804          */
1805         sigemptyset(&set);
1806         sigaddset(&set, SIGCHLD);
1807         sigprocmask(SIG_BLOCK, &set, &oset);
1808
1809         if (child_pid != -1)
1810                 kill(child_pid, SIGTERM);
1811
1812         sigprocmask(SIG_SETMASK, &oset, NULL);
1813
1814         if (signr == -1)
1815                 return;
1816
1817         signal(signr, SIG_DFL);
1818         kill(getpid(), signr);
1819 }
1820
1821 static int stat__set_big_num(const struct option *opt __maybe_unused,
1822                              const char *s __maybe_unused, int unset)
1823 {
1824         big_num_opt = unset ? 0 : 1;
1825         return 0;
1826 }
1827
1828 static int enable_metric_only(const struct option *opt __maybe_unused,
1829                               const char *s __maybe_unused, int unset)
1830 {
1831         force_metric_only = true;
1832         metric_only = !unset;
1833         return 0;
1834 }
1835
1836 static int parse_metric_groups(const struct option *opt,
1837                                const char *str,
1838                                int unset __maybe_unused)
1839 {
1840         return metricgroup__parse_groups(opt, str, &metric_events);
1841 }
1842
1843 static const struct option stat_options[] = {
1844         OPT_BOOLEAN('T', "transaction", &transaction_run,
1845                     "hardware transaction statistics"),
1846         OPT_CALLBACK('e', "event", &evsel_list, "event",
1847                      "event selector. use 'perf list' to list available events",
1848                      parse_events_option),
1849         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1850                      "event filter", parse_filter),
1851         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1852                     "child tasks do not inherit counters"),
1853         OPT_STRING('p', "pid", &target.pid, "pid",
1854                    "stat events on existing process id"),
1855         OPT_STRING('t', "tid", &target.tid, "tid",
1856                    "stat events on existing thread id"),
1857         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1858                     "system-wide collection from all CPUs"),
1859         OPT_BOOLEAN('g', "group", &group,
1860                     "put the counters into a counter group"),
1861         OPT_BOOLEAN('c', "scale", &stat_config.scale, "scale/normalize counters"),
1862         OPT_INCR('v', "verbose", &verbose,
1863                     "be more verbose (show counter open errors, etc)"),
1864         OPT_INTEGER('r', "repeat", &run_count,
1865                     "repeat command and print average + stddev (max: 100, forever: 0)"),
1866         OPT_BOOLEAN('n', "null", &null_run,
1867                     "null run - dont start any counters"),
1868         OPT_INCR('d', "detailed", &detailed_run,
1869                     "detailed run - start a lot of events"),
1870         OPT_BOOLEAN('S', "sync", &sync_run,
1871                     "call sync() before starting a run"),
1872         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1873                            "print large numbers with thousands\' separators",
1874                            stat__set_big_num),
1875         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1876                     "list of cpus to monitor in system-wide"),
1877         OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
1878                     "disable CPU count aggregation", AGGR_NONE),
1879         OPT_BOOLEAN(0, "no-merge", &no_merge, "Do not merge identical named events"),
1880         OPT_STRING('x', "field-separator", &csv_sep, "separator",
1881                    "print counts with custom separator"),
1882         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1883                      "monitor event in cgroup name only", parse_cgroups),
1884         OPT_STRING('o', "output", &output_name, "file", "output file name"),
1885         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1886         OPT_INTEGER(0, "log-fd", &output_fd,
1887                     "log output to fd, instead of stderr"),
1888         OPT_STRING(0, "pre", &pre_cmd, "command",
1889                         "command to run prior to the measured command"),
1890         OPT_STRING(0, "post", &post_cmd, "command",
1891                         "command to run after to the measured command"),
1892         OPT_UINTEGER('I', "interval-print", &stat_config.interval,
1893                     "print counts at regular interval in ms (>= 10)"),
1894         OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
1895                      "aggregate counts per processor socket", AGGR_SOCKET),
1896         OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
1897                      "aggregate counts per physical processor core", AGGR_CORE),
1898         OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
1899                      "aggregate counts per thread", AGGR_THREAD),
1900         OPT_UINTEGER('D', "delay", &initial_delay,
1901                      "ms to wait before starting measurement after program start"),
1902         OPT_CALLBACK_NOOPT(0, "metric-only", &metric_only, NULL,
1903                         "Only print computed metrics. No raw values", enable_metric_only),
1904         OPT_BOOLEAN(0, "topdown", &topdown_run,
1905                         "measure topdown level 1 statistics"),
1906         OPT_BOOLEAN(0, "smi-cost", &smi_cost,
1907                         "measure SMI cost"),
1908         OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
1909                      "monitor specified metrics or metric groups (separated by ,)",
1910                      parse_metric_groups),
1911         OPT_END()
1912 };
1913
1914 static int perf_stat__get_socket(struct cpu_map *map, int cpu)
1915 {
1916         return cpu_map__get_socket(map, cpu, NULL);
1917 }
1918
1919 static int perf_stat__get_core(struct cpu_map *map, int cpu)
1920 {
1921         return cpu_map__get_core(map, cpu, NULL);
1922 }
1923
1924 static int cpu_map__get_max(struct cpu_map *map)
1925 {
1926         int i, max = -1;
1927
1928         for (i = 0; i < map->nr; i++) {
1929                 if (map->map[i] > max)
1930                         max = map->map[i];
1931         }
1932
1933         return max;
1934 }
1935
1936 static struct cpu_map *cpus_aggr_map;
1937
1938 static int perf_stat__get_aggr(aggr_get_id_t get_id, struct cpu_map *map, int idx)
1939 {
1940         int cpu;
1941
1942         if (idx >= map->nr)
1943                 return -1;
1944
1945         cpu = map->map[idx];
1946
1947         if (cpus_aggr_map->map[cpu] == -1)
1948                 cpus_aggr_map->map[cpu] = get_id(map, idx);
1949
1950         return cpus_aggr_map->map[cpu];
1951 }
1952
1953 static int perf_stat__get_socket_cached(struct cpu_map *map, int idx)
1954 {
1955         return perf_stat__get_aggr(perf_stat__get_socket, map, idx);
1956 }
1957
1958 static int perf_stat__get_core_cached(struct cpu_map *map, int idx)
1959 {
1960         return perf_stat__get_aggr(perf_stat__get_core, map, idx);
1961 }
1962
1963 static int perf_stat_init_aggr_mode(void)
1964 {
1965         int nr;
1966
1967         switch (stat_config.aggr_mode) {
1968         case AGGR_SOCKET:
1969                 if (cpu_map__build_socket_map(evsel_list->cpus, &aggr_map)) {
1970                         perror("cannot build socket map");
1971                         return -1;
1972                 }
1973                 aggr_get_id = perf_stat__get_socket_cached;
1974                 break;
1975         case AGGR_CORE:
1976                 if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
1977                         perror("cannot build core map");
1978                         return -1;
1979                 }
1980                 aggr_get_id = perf_stat__get_core_cached;
1981                 break;
1982         case AGGR_NONE:
1983         case AGGR_GLOBAL:
1984         case AGGR_THREAD:
1985         case AGGR_UNSET:
1986         default:
1987                 break;
1988         }
1989
1990         /*
1991          * The evsel_list->cpus is the base we operate on,
1992          * taking the highest cpu number to be the size of
1993          * the aggregation translate cpumap.
1994          */
1995         nr = cpu_map__get_max(evsel_list->cpus);
1996         cpus_aggr_map = cpu_map__empty_new(nr + 1);
1997         return cpus_aggr_map ? 0 : -ENOMEM;
1998 }
1999
2000 static void perf_stat__exit_aggr_mode(void)
2001 {
2002         cpu_map__put(aggr_map);
2003         cpu_map__put(cpus_aggr_map);
2004         aggr_map = NULL;
2005         cpus_aggr_map = NULL;
2006 }
2007
2008 static inline int perf_env__get_cpu(struct perf_env *env, struct cpu_map *map, int idx)
2009 {
2010         int cpu;
2011
2012         if (idx > map->nr)
2013                 return -1;
2014
2015         cpu = map->map[idx];
2016
2017         if (cpu >= env->nr_cpus_avail)
2018                 return -1;
2019
2020         return cpu;
2021 }
2022
2023 static int perf_env__get_socket(struct cpu_map *map, int idx, void *data)
2024 {
2025         struct perf_env *env = data;
2026         int cpu = perf_env__get_cpu(env, map, idx);
2027
2028         return cpu == -1 ? -1 : env->cpu[cpu].socket_id;
2029 }
2030
2031 static int perf_env__get_core(struct cpu_map *map, int idx, void *data)
2032 {
2033         struct perf_env *env = data;
2034         int core = -1, cpu = perf_env__get_cpu(env, map, idx);
2035
2036         if (cpu != -1) {
2037                 int socket_id = env->cpu[cpu].socket_id;
2038
2039                 /*
2040                  * Encode socket in upper 16 bits
2041                  * core_id is relative to socket, and
2042                  * we need a global id. So we combine
2043                  * socket + core id.
2044                  */
2045                 core = (socket_id << 16) | (env->cpu[cpu].core_id & 0xffff);
2046         }
2047
2048         return core;
2049 }
2050
2051 static int perf_env__build_socket_map(struct perf_env *env, struct cpu_map *cpus,
2052                                       struct cpu_map **sockp)
2053 {
2054         return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
2055 }
2056
2057 static int perf_env__build_core_map(struct perf_env *env, struct cpu_map *cpus,
2058                                     struct cpu_map **corep)
2059 {
2060         return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
2061 }
2062
2063 static int perf_stat__get_socket_file(struct cpu_map *map, int idx)
2064 {
2065         return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
2066 }
2067
2068 static int perf_stat__get_core_file(struct cpu_map *map, int idx)
2069 {
2070         return perf_env__get_core(map, idx, &perf_stat.session->header.env);
2071 }
2072
2073 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
2074 {
2075         struct perf_env *env = &st->session->header.env;
2076
2077         switch (stat_config.aggr_mode) {
2078         case AGGR_SOCKET:
2079                 if (perf_env__build_socket_map(env, evsel_list->cpus, &aggr_map)) {
2080                         perror("cannot build socket map");
2081                         return -1;
2082                 }
2083                 aggr_get_id = perf_stat__get_socket_file;
2084                 break;
2085         case AGGR_CORE:
2086                 if (perf_env__build_core_map(env, evsel_list->cpus, &aggr_map)) {
2087                         perror("cannot build core map");
2088                         return -1;
2089                 }
2090                 aggr_get_id = perf_stat__get_core_file;
2091                 break;
2092         case AGGR_NONE:
2093         case AGGR_GLOBAL:
2094         case AGGR_THREAD:
2095         case AGGR_UNSET:
2096         default:
2097                 break;
2098         }
2099
2100         return 0;
2101 }
2102
2103 static int topdown_filter_events(const char **attr, char **str, bool use_group)
2104 {
2105         int off = 0;
2106         int i;
2107         int len = 0;
2108         char *s;
2109
2110         for (i = 0; attr[i]; i++) {
2111                 if (pmu_have_event("cpu", attr[i])) {
2112                         len += strlen(attr[i]) + 1;
2113                         attr[i - off] = attr[i];
2114                 } else
2115                         off++;
2116         }
2117         attr[i - off] = NULL;
2118
2119         *str = malloc(len + 1 + 2);
2120         if (!*str)
2121                 return -1;
2122         s = *str;
2123         if (i - off == 0) {
2124                 *s = 0;
2125                 return 0;
2126         }
2127         if (use_group)
2128                 *s++ = '{';
2129         for (i = 0; attr[i]; i++) {
2130                 strcpy(s, attr[i]);
2131                 s += strlen(s);
2132                 *s++ = ',';
2133         }
2134         if (use_group) {
2135                 s[-1] = '}';
2136                 *s = 0;
2137         } else
2138                 s[-1] = 0;
2139         return 0;
2140 }
2141
2142 __weak bool arch_topdown_check_group(bool *warn)
2143 {
2144         *warn = false;
2145         return false;
2146 }
2147
2148 __weak void arch_topdown_group_warn(void)
2149 {
2150 }
2151
2152 /*
2153  * Add default attributes, if there were no attributes specified or
2154  * if -d/--detailed, -d -d or -d -d -d is used:
2155  */
2156 static int add_default_attributes(void)
2157 {
2158         int err;
2159         struct perf_event_attr default_attrs0[] = {
2160
2161   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
2162   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
2163   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
2164   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
2165
2166   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
2167 };
2168         struct perf_event_attr frontend_attrs[] = {
2169   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
2170 };
2171         struct perf_event_attr backend_attrs[] = {
2172   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
2173 };
2174         struct perf_event_attr default_attrs1[] = {
2175   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
2176   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
2177   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
2178
2179 };
2180
2181 /*
2182  * Detailed stats (-d), covering the L1 and last level data caches:
2183  */
2184         struct perf_event_attr detailed_attrs[] = {
2185
2186   { .type = PERF_TYPE_HW_CACHE,
2187     .config =
2188          PERF_COUNT_HW_CACHE_L1D                <<  0  |
2189         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2190         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2191
2192   { .type = PERF_TYPE_HW_CACHE,
2193     .config =
2194          PERF_COUNT_HW_CACHE_L1D                <<  0  |
2195         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2196         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2197
2198   { .type = PERF_TYPE_HW_CACHE,
2199     .config =
2200          PERF_COUNT_HW_CACHE_LL                 <<  0  |
2201         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2202         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2203
2204   { .type = PERF_TYPE_HW_CACHE,
2205     .config =
2206          PERF_COUNT_HW_CACHE_LL                 <<  0  |
2207         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2208         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2209 };
2210
2211 /*
2212  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
2213  */
2214         struct perf_event_attr very_detailed_attrs[] = {
2215
2216   { .type = PERF_TYPE_HW_CACHE,
2217     .config =
2218          PERF_COUNT_HW_CACHE_L1I                <<  0  |
2219         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2220         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2221
2222   { .type = PERF_TYPE_HW_CACHE,
2223     .config =
2224          PERF_COUNT_HW_CACHE_L1I                <<  0  |
2225         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2226         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2227
2228   { .type = PERF_TYPE_HW_CACHE,
2229     .config =
2230          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
2231         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2232         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2233
2234   { .type = PERF_TYPE_HW_CACHE,
2235     .config =
2236          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
2237         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2238         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2239
2240   { .type = PERF_TYPE_HW_CACHE,
2241     .config =
2242          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
2243         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2244         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2245
2246   { .type = PERF_TYPE_HW_CACHE,
2247     .config =
2248          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
2249         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
2250         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2251
2252 };
2253
2254 /*
2255  * Very, very detailed stats (-d -d -d), adding prefetch events:
2256  */
2257         struct perf_event_attr very_very_detailed_attrs[] = {
2258
2259   { .type = PERF_TYPE_HW_CACHE,
2260     .config =
2261          PERF_COUNT_HW_CACHE_L1D                <<  0  |
2262         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
2263         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
2264
2265   { .type = PERF_TYPE_HW_CACHE,
2266     .config =
2267          PERF_COUNT_HW_CACHE_L1D                <<  0  |
2268         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
2269         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
2270 };
2271
2272         /* Set attrs if no event is selected and !null_run: */
2273         if (null_run)
2274                 return 0;
2275
2276         if (transaction_run) {
2277                 if (pmu_have_event("cpu", "cycles-ct") &&
2278                     pmu_have_event("cpu", "el-start"))
2279                         err = parse_events(evsel_list, transaction_attrs, NULL);
2280                 else
2281                         err = parse_events(evsel_list, transaction_limited_attrs, NULL);
2282                 if (err) {
2283                         fprintf(stderr, "Cannot set up transaction events\n");
2284                         return -1;
2285                 }
2286                 return 0;
2287         }
2288
2289         if (smi_cost) {
2290                 int smi;
2291
2292                 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
2293                         fprintf(stderr, "freeze_on_smi is not supported.\n");
2294                         return -1;
2295                 }
2296
2297                 if (!smi) {
2298                         if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) {
2299                                 fprintf(stderr, "Failed to set freeze_on_smi.\n");
2300                                 return -1;
2301                         }
2302                         smi_reset = true;
2303                 }
2304
2305                 if (pmu_have_event("msr", "aperf") &&
2306                     pmu_have_event("msr", "smi")) {
2307                         if (!force_metric_only)
2308                                 metric_only = true;
2309                         err = parse_events(evsel_list, smi_cost_attrs, NULL);
2310                 } else {
2311                         fprintf(stderr, "To measure SMI cost, it needs "
2312                                 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n");
2313                         return -1;
2314                 }
2315                 if (err) {
2316                         fprintf(stderr, "Cannot set up SMI cost events\n");
2317                         return -1;
2318                 }
2319                 return 0;
2320         }
2321
2322         if (topdown_run) {
2323                 char *str = NULL;
2324                 bool warn = false;
2325
2326                 if (stat_config.aggr_mode != AGGR_GLOBAL &&
2327                     stat_config.aggr_mode != AGGR_CORE) {
2328                         pr_err("top down event configuration requires --per-core mode\n");
2329                         return -1;
2330                 }
2331                 stat_config.aggr_mode = AGGR_CORE;
2332                 if (nr_cgroups || !target__has_cpu(&target)) {
2333                         pr_err("top down event configuration requires system-wide mode (-a)\n");
2334                         return -1;
2335                 }
2336
2337                 if (!force_metric_only)
2338                         metric_only = true;
2339                 if (topdown_filter_events(topdown_attrs, &str,
2340                                 arch_topdown_check_group(&warn)) < 0) {
2341                         pr_err("Out of memory\n");
2342                         return -1;
2343                 }
2344                 if (topdown_attrs[0] && str) {
2345                         if (warn)
2346                                 arch_topdown_group_warn();
2347                         err = parse_events(evsel_list, str, NULL);
2348                         if (err) {
2349                                 fprintf(stderr,
2350                                         "Cannot set up top down events %s: %d\n",
2351                                         str, err);
2352                                 free(str);
2353                                 return -1;
2354                         }
2355                 } else {
2356                         fprintf(stderr, "System does not support topdown\n");
2357                         return -1;
2358                 }
2359                 free(str);
2360         }
2361
2362         if (!evsel_list->nr_entries) {
2363                 if (target__has_cpu(&target))
2364                         default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
2365
2366                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
2367                         return -1;
2368                 if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
2369                         if (perf_evlist__add_default_attrs(evsel_list,
2370                                                 frontend_attrs) < 0)
2371                                 return -1;
2372                 }
2373                 if (pmu_have_event("cpu", "stalled-cycles-backend")) {
2374                         if (perf_evlist__add_default_attrs(evsel_list,
2375                                                 backend_attrs) < 0)
2376                                 return -1;
2377                 }
2378                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
2379                         return -1;
2380         }
2381
2382         /* Detailed events get appended to the event list: */
2383
2384         if (detailed_run <  1)
2385                 return 0;
2386
2387         /* Append detailed run extra attributes: */
2388         if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
2389                 return -1;
2390
2391         if (detailed_run < 2)
2392                 return 0;
2393
2394         /* Append very detailed run extra attributes: */
2395         if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
2396                 return -1;
2397
2398         if (detailed_run < 3)
2399                 return 0;
2400
2401         /* Append very, very detailed run extra attributes: */
2402         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
2403 }
2404
2405 static const char * const stat_record_usage[] = {
2406         "perf stat record [<options>]",
2407         NULL,
2408 };
2409
2410 static void init_features(struct perf_session *session)
2411 {
2412         int feat;
2413
2414         for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
2415                 perf_header__set_feat(&session->header, feat);
2416
2417         perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
2418         perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
2419         perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
2420         perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
2421 }
2422
2423 static int __cmd_record(int argc, const char **argv)
2424 {
2425         struct perf_session *session;
2426         struct perf_data *data = &perf_stat.data;
2427
2428         argc = parse_options(argc, argv, stat_options, stat_record_usage,
2429                              PARSE_OPT_STOP_AT_NON_OPTION);
2430
2431         if (output_name)
2432                 data->file.path = output_name;
2433
2434         if (run_count != 1 || forever) {
2435                 pr_err("Cannot use -r option with perf stat record.\n");
2436                 return -1;
2437         }
2438
2439         session = perf_session__new(data, false, NULL);
2440         if (session == NULL) {
2441                 pr_err("Perf session creation failed.\n");
2442                 return -1;
2443         }
2444
2445         init_features(session);
2446
2447         session->evlist   = evsel_list;
2448         perf_stat.session = session;
2449         perf_stat.record  = true;
2450         return argc;
2451 }
2452
2453 static int process_stat_round_event(struct perf_tool *tool __maybe_unused,
2454                                     union perf_event *event,
2455                                     struct perf_session *session)
2456 {
2457         struct stat_round_event *stat_round = &event->stat_round;
2458         struct perf_evsel *counter;
2459         struct timespec tsh, *ts = NULL;
2460         const char **argv = session->header.env.cmdline_argv;
2461         int argc = session->header.env.nr_cmdline;
2462
2463         evlist__for_each_entry(evsel_list, counter)
2464                 perf_stat_process_counter(&stat_config, counter);
2465
2466         if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
2467                 update_stats(&walltime_nsecs_stats, stat_round->time);
2468
2469         if (stat_config.interval && stat_round->time) {
2470                 tsh.tv_sec  = stat_round->time / NSEC_PER_SEC;
2471                 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
2472                 ts = &tsh;
2473         }
2474
2475         print_counters(ts, argc, argv);
2476         return 0;
2477 }
2478
2479 static
2480 int process_stat_config_event(struct perf_tool *tool,
2481                               union perf_event *event,
2482                               struct perf_session *session __maybe_unused)
2483 {
2484         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2485
2486         perf_event__read_stat_config(&stat_config, &event->stat_config);
2487
2488         if (cpu_map__empty(st->cpus)) {
2489                 if (st->aggr_mode != AGGR_UNSET)
2490                         pr_warning("warning: processing task data, aggregation mode not set\n");
2491                 return 0;
2492         }
2493
2494         if (st->aggr_mode != AGGR_UNSET)
2495                 stat_config.aggr_mode = st->aggr_mode;
2496
2497         if (perf_stat.data.is_pipe)
2498                 perf_stat_init_aggr_mode();
2499         else
2500                 perf_stat_init_aggr_mode_file(st);
2501
2502         return 0;
2503 }
2504
2505 static int set_maps(struct perf_stat *st)
2506 {
2507         if (!st->cpus || !st->threads)
2508                 return 0;
2509
2510         if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
2511                 return -EINVAL;
2512
2513         perf_evlist__set_maps(evsel_list, st->cpus, st->threads);
2514
2515         if (perf_evlist__alloc_stats(evsel_list, true))
2516                 return -ENOMEM;
2517
2518         st->maps_allocated = true;
2519         return 0;
2520 }
2521
2522 static
2523 int process_thread_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
2529         if (st->threads) {
2530                 pr_warning("Extra thread map event, ignoring.\n");
2531                 return 0;
2532         }
2533
2534         st->threads = thread_map__new_event(&event->thread_map);
2535         if (!st->threads)
2536                 return -ENOMEM;
2537
2538         return set_maps(st);
2539 }
2540
2541 static
2542 int process_cpu_map_event(struct perf_tool *tool,
2543                           union perf_event *event,
2544                           struct perf_session *session __maybe_unused)
2545 {
2546         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
2547         struct cpu_map *cpus;
2548
2549         if (st->cpus) {
2550                 pr_warning("Extra cpu map event, ignoring.\n");
2551                 return 0;
2552         }
2553
2554         cpus = cpu_map__new_data(&event->cpu_map.data);
2555         if (!cpus)
2556                 return -ENOMEM;
2557
2558         st->cpus = cpus;
2559         return set_maps(st);
2560 }
2561
2562 static int runtime_stat_new(struct perf_stat_config *config, int nthreads)
2563 {
2564         int i;
2565
2566         config->stats = calloc(nthreads, sizeof(struct runtime_stat));
2567         if (!config->stats)
2568                 return -1;
2569
2570         config->stats_num = nthreads;
2571
2572         for (i = 0; i < nthreads; i++)
2573                 runtime_stat__init(&config->stats[i]);
2574
2575         return 0;
2576 }
2577
2578 static void runtime_stat_delete(struct perf_stat_config *config)
2579 {
2580         int i;
2581
2582         if (!config->stats)
2583                 return;
2584
2585         for (i = 0; i < config->stats_num; i++)
2586                 runtime_stat__exit(&config->stats[i]);
2587
2588         free(config->stats);
2589 }
2590
2591 static const char * const stat_report_usage[] = {
2592         "perf stat report [<options>]",
2593         NULL,
2594 };
2595
2596 static struct perf_stat perf_stat = {
2597         .tool = {
2598                 .attr           = perf_event__process_attr,
2599                 .event_update   = perf_event__process_event_update,
2600                 .thread_map     = process_thread_map_event,
2601                 .cpu_map        = process_cpu_map_event,
2602                 .stat_config    = process_stat_config_event,
2603                 .stat           = perf_event__process_stat_event,
2604                 .stat_round     = process_stat_round_event,
2605         },
2606         .aggr_mode = AGGR_UNSET,
2607 };
2608
2609 static int __cmd_report(int argc, const char **argv)
2610 {
2611         struct perf_session *session;
2612         const struct option options[] = {
2613         OPT_STRING('i', "input", &input_name, "file", "input file name"),
2614         OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
2615                      "aggregate counts per processor socket", AGGR_SOCKET),
2616         OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
2617                      "aggregate counts per physical processor core", AGGR_CORE),
2618         OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
2619                      "disable CPU count aggregation", AGGR_NONE),
2620         OPT_END()
2621         };
2622         struct stat st;
2623         int ret;
2624
2625         argc = parse_options(argc, argv, options, stat_report_usage, 0);
2626
2627         if (!input_name || !strlen(input_name)) {
2628                 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
2629                         input_name = "-";
2630                 else
2631                         input_name = "perf.data";
2632         }
2633
2634         perf_stat.data.file.path = input_name;
2635         perf_stat.data.mode      = PERF_DATA_MODE_READ;
2636
2637         session = perf_session__new(&perf_stat.data, false, &perf_stat.tool);
2638         if (session == NULL)
2639                 return -1;
2640
2641         perf_stat.session  = session;
2642         stat_config.output = stderr;
2643         evsel_list         = session->evlist;
2644
2645         ret = perf_session__process_events(session);
2646         if (ret)
2647                 return ret;
2648
2649         perf_session__delete(session);
2650         return 0;
2651 }
2652
2653 static void setup_system_wide(int forks)
2654 {
2655         /*
2656          * Make system wide (-a) the default target if
2657          * no target was specified and one of following
2658          * conditions is met:
2659          *
2660          *   - there's no workload specified
2661          *   - there is workload specified but all requested
2662          *     events are system wide events
2663          */
2664         if (!target__none(&target))
2665                 return;
2666
2667         if (!forks)
2668                 target.system_wide = true;
2669         else {
2670                 struct perf_evsel *counter;
2671
2672                 evlist__for_each_entry(evsel_list, counter) {
2673                         if (!counter->system_wide)
2674                                 return;
2675                 }
2676
2677                 if (evsel_list->nr_entries)
2678                         target.system_wide = true;
2679         }
2680 }
2681
2682 int cmd_stat(int argc, const char **argv)
2683 {
2684         const char * const stat_usage[] = {
2685                 "perf stat [<options>] [<command>]",
2686                 NULL
2687         };
2688         int status = -EINVAL, run_idx;
2689         const char *mode;
2690         FILE *output = stderr;
2691         unsigned int interval;
2692         const char * const stat_subcommands[] = { "record", "report" };
2693
2694         setlocale(LC_ALL, "");
2695
2696         evsel_list = perf_evlist__new();
2697         if (evsel_list == NULL)
2698                 return -ENOMEM;
2699
2700         parse_events__shrink_config_terms();
2701         argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
2702                                         (const char **) stat_usage,
2703                                         PARSE_OPT_STOP_AT_NON_OPTION);
2704         perf_stat__collect_metric_expr(evsel_list);
2705         perf_stat__init_shadow_stats();
2706
2707         if (csv_sep) {
2708                 csv_output = true;
2709                 if (!strcmp(csv_sep, "\\t"))
2710                         csv_sep = "\t";
2711         } else
2712                 csv_sep = DEFAULT_SEPARATOR;
2713
2714         if (argc && !strncmp(argv[0], "rec", 3)) {
2715                 argc = __cmd_record(argc, argv);
2716                 if (argc < 0)
2717                         return -1;
2718         } else if (argc && !strncmp(argv[0], "rep", 3))
2719                 return __cmd_report(argc, argv);
2720
2721         interval = stat_config.interval;
2722
2723         /*
2724          * For record command the -o is already taken care of.
2725          */
2726         if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
2727                 output = NULL;
2728
2729         if (output_name && output_fd) {
2730                 fprintf(stderr, "cannot use both --output and --log-fd\n");
2731                 parse_options_usage(stat_usage, stat_options, "o", 1);
2732                 parse_options_usage(NULL, stat_options, "log-fd", 0);
2733                 goto out;
2734         }
2735
2736         if (metric_only && stat_config.aggr_mode == AGGR_THREAD) {
2737                 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
2738                 goto out;
2739         }
2740
2741         if (metric_only && run_count > 1) {
2742                 fprintf(stderr, "--metric-only is not supported with -r\n");
2743                 goto out;
2744         }
2745
2746         if (output_fd < 0) {
2747                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
2748                 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
2749                 goto out;
2750         }
2751
2752         if (!output) {
2753                 struct timespec tm;
2754                 mode = append_file ? "a" : "w";
2755
2756                 output = fopen(output_name, mode);
2757                 if (!output) {
2758                         perror("failed to create output file");
2759                         return -1;
2760                 }
2761                 clock_gettime(CLOCK_REALTIME, &tm);
2762                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
2763         } else if (output_fd > 0) {
2764                 mode = append_file ? "a" : "w";
2765                 output = fdopen(output_fd, mode);
2766                 if (!output) {
2767                         perror("Failed opening logfd");
2768                         return -errno;
2769                 }
2770         }
2771
2772         stat_config.output = output;
2773
2774         /*
2775          * let the spreadsheet do the pretty-printing
2776          */
2777         if (csv_output) {
2778                 /* User explicitly passed -B? */
2779                 if (big_num_opt == 1) {
2780                         fprintf(stderr, "-B option not supported with -x\n");
2781                         parse_options_usage(stat_usage, stat_options, "B", 1);
2782                         parse_options_usage(NULL, stat_options, "x", 1);
2783                         goto out;
2784                 } else /* Nope, so disable big number formatting */
2785                         big_num = false;
2786         } else if (big_num_opt == 0) /* User passed --no-big-num */
2787                 big_num = false;
2788
2789         setup_system_wide(argc);
2790
2791         if (run_count < 0) {
2792                 pr_err("Run count must be a positive number\n");
2793                 parse_options_usage(stat_usage, stat_options, "r", 1);
2794                 goto out;
2795         } else if (run_count == 0) {
2796                 forever = true;
2797                 run_count = 1;
2798         }
2799
2800         if ((stat_config.aggr_mode == AGGR_THREAD) &&
2801                 !target__has_task(&target)) {
2802                 if (!target.system_wide || target.cpu_list) {
2803                         fprintf(stderr, "The --per-thread option is only "
2804                                 "available when monitoring via -p -t -a "
2805                                 "options or only --per-thread.\n");
2806                         parse_options_usage(NULL, stat_options, "p", 1);
2807                         parse_options_usage(NULL, stat_options, "t", 1);
2808                         goto out;
2809                 }
2810         }
2811
2812         /*
2813          * no_aggr, cgroup are for system-wide only
2814          * --per-thread is aggregated per thread, we dont mix it with cpu mode
2815          */
2816         if (((stat_config.aggr_mode != AGGR_GLOBAL &&
2817               stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
2818             !target__has_cpu(&target)) {
2819                 fprintf(stderr, "both cgroup and no-aggregation "
2820                         "modes only available in system-wide mode\n");
2821
2822                 parse_options_usage(stat_usage, stat_options, "G", 1);
2823                 parse_options_usage(NULL, stat_options, "A", 1);
2824                 parse_options_usage(NULL, stat_options, "a", 1);
2825                 goto out;
2826         }
2827
2828         if (add_default_attributes())
2829                 goto out;
2830
2831         target__validate(&target);
2832
2833         if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
2834                 target.per_thread = true;
2835
2836         if (perf_evlist__create_maps(evsel_list, &target) < 0) {
2837                 if (target__has_task(&target)) {
2838                         pr_err("Problems finding threads of monitor\n");
2839                         parse_options_usage(stat_usage, stat_options, "p", 1);
2840                         parse_options_usage(NULL, stat_options, "t", 1);
2841                 } else if (target__has_cpu(&target)) {
2842                         perror("failed to parse CPUs map");
2843                         parse_options_usage(stat_usage, stat_options, "C", 1);
2844                         parse_options_usage(NULL, stat_options, "a", 1);
2845                 }
2846                 goto out;
2847         }
2848
2849         /*
2850          * Initialize thread_map with comm names,
2851          * so we could print it out on output.
2852          */
2853         if (stat_config.aggr_mode == AGGR_THREAD) {
2854                 thread_map__read_comms(evsel_list->threads);
2855                 if (target.system_wide) {
2856                         if (runtime_stat_new(&stat_config,
2857                                 thread_map__nr(evsel_list->threads))) {
2858                                 goto out;
2859                         }
2860                 }
2861         }
2862
2863         if (interval && interval < 100) {
2864                 if (interval < 10) {
2865                         pr_err("print interval must be >= 10ms\n");
2866                         parse_options_usage(stat_usage, stat_options, "I", 1);
2867                         goto out;
2868                 } else
2869                         pr_warning("print interval < 100ms. "
2870                                    "The overhead percentage could be high in some cases. "
2871                                    "Please proceed with caution.\n");
2872         }
2873
2874         if (perf_evlist__alloc_stats(evsel_list, interval))
2875                 goto out;
2876
2877         if (perf_stat_init_aggr_mode())
2878                 goto out;
2879
2880         /*
2881          * We dont want to block the signals - that would cause
2882          * child tasks to inherit that and Ctrl-C would not work.
2883          * What we want is for Ctrl-C to work in the exec()-ed
2884          * task, but being ignored by perf stat itself:
2885          */
2886         atexit(sig_atexit);
2887         if (!forever)
2888                 signal(SIGINT,  skip_signal);
2889         signal(SIGCHLD, skip_signal);
2890         signal(SIGALRM, skip_signal);
2891         signal(SIGABRT, skip_signal);
2892
2893         status = 0;
2894         for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
2895                 if (run_count != 1 && verbose > 0)
2896                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
2897                                 run_idx + 1);
2898
2899                 status = run_perf_stat(argc, argv);
2900                 if (forever && status != -1) {
2901                         print_counters(NULL, argc, argv);
2902                         perf_stat__reset_stats();
2903                 }
2904         }
2905
2906         if (!forever && status != -1 && !interval)
2907                 print_counters(NULL, argc, argv);
2908
2909         if (STAT_RECORD) {
2910                 /*
2911                  * We synthesize the kernel mmap record just so that older tools
2912                  * don't emit warnings about not being able to resolve symbols
2913                  * due to /proc/sys/kernel/kptr_restrict settings and instear provide
2914                  * a saner message about no samples being in the perf.data file.
2915                  *
2916                  * This also serves to suppress a warning about f_header.data.size == 0
2917                  * in header.c at the moment 'perf stat record' gets introduced, which
2918                  * is not really needed once we start adding the stat specific PERF_RECORD_
2919                  * records, but the need to suppress the kptr_restrict messages in older
2920                  * tools remain  -acme
2921                  */
2922                 int fd = perf_data__fd(&perf_stat.data);
2923                 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
2924                                                              process_synthesized_event,
2925                                                              &perf_stat.session->machines.host);
2926                 if (err) {
2927                         pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
2928                                    "older tools may produce warnings about this file\n.");
2929                 }
2930
2931                 if (!interval) {
2932                         if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
2933                                 pr_err("failed to write stat round event\n");
2934                 }
2935
2936                 if (!perf_stat.data.is_pipe) {
2937                         perf_stat.session->header.data_size += perf_stat.bytes_written;
2938                         perf_session__write_header(perf_stat.session, evsel_list, fd, true);
2939                 }
2940
2941                 perf_session__delete(perf_stat.session);
2942         }
2943
2944         perf_stat__exit_aggr_mode();
2945         perf_evlist__free_stats(evsel_list);
2946 out:
2947         if (smi_cost && smi_reset)
2948                 sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
2949
2950         perf_evlist__delete(evsel_list);
2951
2952         runtime_stat_delete(&stat_config);
2953
2954         return status;
2955 }