tools/perf/builtin-stat.c

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