tools/perf/builtin-stat.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * builtin-stat.c
   4  *
   5  * Builtin stat command: Give a precise performance counters summary
   6  * overview about any workload, CPU or specific PID.
   7  *
   8  * Sample output:
   9
  10    $ perf stat ./hackbench 10
  11
  12   Time: 0.118
  13
  14   Performance counter stats for './hackbench 10':
  15
  16        1708.761321 task-clock                #   11.037 CPUs utilized
  17             41,190 context-switches          #    0.024 M/sec
  18              6,735 CPU-migrations            #    0.004 M/sec
  19             17,318 page-faults               #    0.010 M/sec
  20      5,205,202,243 cycles                    #    3.046 GHz
  21      3,856,436,920 stalled-cycles-frontend   #   74.09% frontend cycles idle
  22      1,600,790,871 stalled-cycles-backend    #   30.75% backend  cycles idle
  23      2,603,501,247 instructions              #    0.50  insns per cycle
  24                                              #    1.48  stalled cycles per insn
  25        484,357,498 branches                  #  283.455 M/sec
  26          6,388,934 branch-misses             #    1.32% of all branches
  27
  28         0.154822978  seconds time elapsed
  29
  30  *
  31  * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
  32  *
  33  * Improvements and fixes by:
  34  *
  35  *   Arjan van de Ven <arjan@linux.intel.com>
  36  *   Yanmin Zhang <yanmin.zhang@intel.com>
  37  *   Wu Fengguang <fengguang.wu@intel.com>
  38  *   Mike Galbraith <efault@gmx.de>
  39  *   Paul Mackerras <paulus@samba.org>
  40  *   Jaswinder Singh Rajput <jaswinder@kernel.org>
  41  */
  42
  43 #include "builtin.h"
  44 #include "perf.h"
  45 #include "util/cgroup.h"
  46 #include <subcmd/parse-options.h>
  47 #include "util/parse-events.h"
  48 #include "util/pmu.h"
  49 #include "util/event.h"
  50 #include "util/evlist.h"
  51 #include "util/evsel.h"
  52 #include "util/debug.h"
  53 #include "util/color.h"
  54 #include "util/stat.h"
  55 #include "util/header.h"
  56 #include "util/cpumap.h"
  57 #include "util/thread_map.h"
  58 #include "util/counts.h"
  59 #include "util/group.h"
  60 #include "util/session.h"
  61 #include "util/tool.h"
  62 #include "util/string2.h"
  63 #include "util/metricgroup.h"
  64 #include "util/synthetic-events.h"
  65 #include "util/target.h"
  66 #include "util/time-utils.h"
  67 #include "util/top.h"
  68 #include "util/affinity.h"
  69 #include "asm/bug.h"
  70
  71 #include <linux/time64.h>
  72 #include <linux/zalloc.h>
  73 #include <api/fs/fs.h>
  74 #include <errno.h>
  75 #include <signal.h>
  76 #include <stdlib.h>
  77 #include <sys/prctl.h>
  78 #include <inttypes.h>
  79 #include <locale.h>
  80 #include <math.h>
  81 #include <sys/types.h>
  82 #include <sys/stat.h>
  83 #include <sys/wait.h>
  84 #include <unistd.h>
  85 #include <sys/time.h>
  86 #include <sys/resource.h>
  87 #include <linux/err.h>
  88
  89 #include <linux/ctype.h>
  90 #include <perf/evlist.h>
  91
  92 #define DEFAULT_SEPARATOR       " "
  93 #define FREEZE_ON_SMI_PATH      "devices/cpu/freeze_on_smi"
  94
  95 static void print_counters(struct timespec *ts, int argc, const char **argv);
  96
  97 /* Default events used for perf stat -T */
  98 static const char *transaction_attrs = {
  99         "task-clock,"
 100         "{"
 101         "instructions,"
 102         "cycles,"
 103         "cpu/cycles-t/,"
 104         "cpu/tx-start/,"
 105         "cpu/el-start/,"
 106         "cpu/cycles-ct/"
 107         "}"
 108 };
 109
 110 /* More limited version when the CPU does not have all events. */
 111 static const char * transaction_limited_attrs = {
 112         "task-clock,"
 113         "{"
 114         "instructions,"
 115         "cycles,"
 116         "cpu/cycles-t/,"
 117         "cpu/tx-start/"
 118         "}"
 119 };
 120
 121 static const char * topdown_attrs[] = {
 122         "topdown-total-slots",
 123         "topdown-slots-retired",
 124         "topdown-recovery-bubbles",
 125         "topdown-fetch-bubbles",
 126         "topdown-slots-issued",
 127         NULL,
 128 };
 129
 130 static const char *smi_cost_attrs = {
 131         "{"
 132         "msr/aperf/,"
 133         "msr/smi/,"
 134         "cycles"
 135         "}"
 136 };
 137
 138 static struct evlist    *evsel_list;
 139
 140 static struct target target = {
 141         .uid    = UINT_MAX,
 142 };
 143
 144 #define METRIC_ONLY_LEN 20
 145
 146 static volatile pid_t           child_pid                       = -1;
 147 static int                      detailed_run                    =  0;
 148 static bool                     transaction_run;
 149 static bool                     topdown_run                     = false;
 150 static bool                     smi_cost                        = false;
 151 static bool                     smi_reset                       = false;
 152 static int                      big_num_opt                     =  -1;
 153 static bool                     group                           = false;
 154 static const char               *pre_cmd                        = NULL;
 155 static const char               *post_cmd                       = NULL;
 156 static bool                     sync_run                        = false;
 157 static bool                     forever                         = false;
 158 static bool                     force_metric_only               = false;
 159 static struct timespec          ref_time;
 160 static bool                     append_file;
 161 static bool                     interval_count;
 162 static const char               *output_name;
 163 static int                      output_fd;
 164
 165 struct perf_stat {
 166         bool                     record;
 167         struct perf_data         data;
 168         struct perf_session     *session;
 169         u64                      bytes_written;
 170         struct perf_tool         tool;
 171         bool                     maps_allocated;
 172         struct perf_cpu_map     *cpus;
 173         struct perf_thread_map *threads;
 174         enum aggr_mode           aggr_mode;
 175 };
 176
 177 static struct perf_stat         perf_stat;
 178 #define STAT_RECORD             perf_stat.record
 179
 180 static volatile int done = 0;
 181
 182 static struct perf_stat_config stat_config = {
 183         .aggr_mode              = AGGR_GLOBAL,
 184         .scale                  = true,
 185         .unit_width             = 4, /* strlen("unit") */
 186         .run_count              = 1,
 187         .metric_only_len        = METRIC_ONLY_LEN,
 188         .walltime_nsecs_stats   = &walltime_nsecs_stats,
 189         .big_num                = true,
 190 };
 191
 192 static inline void diff_timespec(struct timespec *r, struct timespec *a,
 193                                  struct timespec *b)
 194 {
 195         r->tv_sec = a->tv_sec - b->tv_sec;
 196         if (a->tv_nsec < b->tv_nsec) {
 197                 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
 198                 r->tv_sec--;
 199         } else {
 200                 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
 201         }
 202 }
 203
 204 static void perf_stat__reset_stats(void)
 205 {
 206         int i;
 207
 208         perf_evlist__reset_stats(evsel_list);
 209         perf_stat__reset_shadow_stats();
 210
 211         for (i = 0; i < stat_config.stats_num; i++)
 212                 perf_stat__reset_shadow_per_stat(&stat_config.stats[i]);
 213 }
 214
 215 static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
 216                                      union perf_event *event,
 217                                      struct perf_sample *sample __maybe_unused,
 218                                      struct machine *machine __maybe_unused)
 219 {
 220         if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) {
 221                 pr_err("failed to write perf data, error: %m\n");
 222                 return -1;
 223         }
 224
 225         perf_stat.bytes_written += event->header.size;
 226         return 0;
 227 }
 228
 229 static int write_stat_round_event(u64 tm, u64 type)
 230 {
 231         return perf_event__synthesize_stat_round(NULL, tm, type,
 232                                                  process_synthesized_event,
 233                                                  NULL);
 234 }
 235
 236 #define WRITE_STAT_ROUND_EVENT(time, interval) \
 237         write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
 238
 239 #define SID(e, x, y) xyarray__entry(e->core.sample_id, x, y)
 240
 241 static int
 242 perf_evsel__write_stat_event(struct evsel *counter, u32 cpu, u32 thread,
 243                              struct perf_counts_values *count)
 244 {
 245         struct perf_sample_id *sid = SID(counter, cpu, thread);
 246
 247         return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
 248                                            process_synthesized_event, NULL);
 249 }
 250
 251 static int read_single_counter(struct evsel *counter, int cpu,
 252                                int thread, struct timespec *rs)
 253 {
 254         if (counter->tool_event == PERF_TOOL_DURATION_TIME) {
 255                 u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL;
 256                 struct perf_counts_values *count =
 257                         perf_counts(counter->counts, cpu, thread);
 258                 count->ena = count->run = val;
 259                 count->val = val;
 260                 return 0;
 261         }
 262         return perf_evsel__read_counter(counter, cpu, thread);
 263 }
 264
 265 /*
 266  * Read out the results of a single counter:
 267  * do not aggregate counts across CPUs in system-wide mode
 268  */
 269 static int read_counter_cpu(struct evsel *counter, struct timespec *rs, int cpu)
 270 {
 271         int nthreads = perf_thread_map__nr(evsel_list->core.threads);
 272         int thread;
 273
 274         if (!counter->supported)
 275                 return -ENOENT;
 276
 277         if (counter->core.system_wide)
 278                 nthreads = 1;
 279
 280         for (thread = 0; thread < nthreads; thread++) {
 281                 struct perf_counts_values *count;
 282
 283                 count = perf_counts(counter->counts, cpu, thread);
 284
 285                 /*
 286                  * The leader's group read loads data into its group members
 287                  * (via perf_evsel__read_counter()) and sets their count->loaded.
 288                  */
 289                 if (!perf_counts__is_loaded(counter->counts, cpu, thread) &&
 290                     read_single_counter(counter, cpu, thread, rs)) {
 291                         counter->counts->scaled = -1;
 292                         perf_counts(counter->counts, cpu, thread)->ena = 0;
 293                         perf_counts(counter->counts, cpu, thread)->run = 0;
 294                         return -1;
 295                 }
 296
 297                 perf_counts__set_loaded(counter->counts, cpu, thread, false);
 298
 299                 if (STAT_RECORD) {
 300                         if (perf_evsel__write_stat_event(counter, cpu, thread, count)) {
 301                                 pr_err("failed to write stat event\n");
 302                                 return -1;
 303                         }
 304                 }
 305
 306                 if (verbose > 1) {
 307                         fprintf(stat_config.output,
 308                                 "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 309                                         perf_evsel__name(counter),
 310                                         cpu,
 311                                         count->val, count->ena, count->run);
 312                 }
 313         }
 314
 315         return 0;
 316 }
 317
 318 static void read_counters(struct timespec *rs)
 319 {
 320         struct evsel *counter;
 321         struct affinity affinity;
 322         int i, ncpus, cpu;
 323
 324         if (affinity__setup(&affinity) < 0)
 325                 return;
 326
 327         ncpus = perf_cpu_map__nr(evsel_list->core.all_cpus);
 328         if (!target__has_cpu(&target) || target__has_per_thread(&target))
 329                 ncpus = 1;
 330         evlist__for_each_cpu(evsel_list, i, cpu) {
 331                 if (i >= ncpus)
 332                         break;
 333                 affinity__set(&affinity, cpu);
 334
 335                 evlist__for_each_entry(evsel_list, counter) {
 336                         if (evsel__cpu_iter_skip(counter, cpu))
 337                                 continue;
 338                         if (!counter->err) {
 339                                 counter->err = read_counter_cpu(counter, rs,
 340                                                                 counter->cpu_iter - 1);
 341                         }
 342                 }
 343         }
 344         affinity__cleanup(&affinity);
 345
 346         evlist__for_each_entry(evsel_list, counter) {
 347                 if (counter->err)
 348                         pr_debug("failed to read counter %s\n", counter->name);
 349                 if (counter->err == 0 && perf_stat_process_counter(&stat_config, counter))
 350                         pr_warning("failed to process counter %s\n", counter->name);
 351                 counter->err = 0;
 352         }
 353 }
 354
 355 static void process_interval(void)
 356 {
 357         struct timespec ts, rs;
 358
 359         clock_gettime(CLOCK_MONOTONIC, &ts);
 360         diff_timespec(&rs, &ts, &ref_time);
 361
 362         read_counters(&rs);
 363
 364         if (STAT_RECORD) {
 365                 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
 366                         pr_err("failed to write stat round event\n");
 367         }
 368
 369         init_stats(&walltime_nsecs_stats);
 370         update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000);
 371         print_counters(&rs, 0, NULL);
 372 }
 373
 374 static void enable_counters(void)
 375 {
 376         if (stat_config.initial_delay)
 377                 usleep(stat_config.initial_delay * USEC_PER_MSEC);
 378
 379         /*
 380          * We need to enable counters only if:
 381          * - we don't have tracee (attaching to task or cpu)
 382          * - we have initial delay configured
 383          */
 384         if (!target__none(&target) || stat_config.initial_delay)
 385                 evlist__enable(evsel_list);
 386 }
 387
 388 static void disable_counters(void)
 389 {
 390         /*
 391          * If we don't have tracee (attaching to task or cpu), counters may
 392          * still be running. To get accurate group ratios, we must stop groups
 393          * from counting before reading their constituent counters.
 394          */
 395         if (!target__none(&target))
 396                 evlist__disable(evsel_list);
 397 }
 398
 399 static volatile int workload_exec_errno;
 400
 401 /*
 402  * perf_evlist__prepare_workload will send a SIGUSR1
 403  * if the fork fails, since we asked by setting its
 404  * want_signal to true.
 405  */
 406 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
 407                                         void *ucontext __maybe_unused)
 408 {
 409         workload_exec_errno = info->si_value.sival_int;
 410 }
 411
 412 static bool perf_evsel__should_store_id(struct evsel *counter)
 413 {
 414         return STAT_RECORD || counter->core.attr.read_format & PERF_FORMAT_ID;
 415 }
 416
 417 static bool is_target_alive(struct target *_target,
 418                             struct perf_thread_map *threads)
 419 {
 420         struct stat st;
 421         int i;
 422
 423         if (!target__has_task(_target))
 424                 return true;
 425
 426         for (i = 0; i < threads->nr; i++) {
 427                 char path[PATH_MAX];
 428
 429                 scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(),
 430                           threads->map[i].pid);
 431
 432                 if (!stat(path, &st))
 433                         return true;
 434         }
 435
 436         return false;
 437 }
 438
 439 enum counter_recovery {
 440         COUNTER_SKIP,
 441         COUNTER_RETRY,
 442         COUNTER_FATAL,
 443 };
 444
 445 static enum counter_recovery stat_handle_error(struct evsel *counter)
 446 {
 447         char msg[BUFSIZ];
 448         /*
 449          * PPC returns ENXIO for HW counters until 2.6.37
 450          * (behavior changed with commit b0a873e).
 451          */
 452         if (errno == EINVAL || errno == ENOSYS ||
 453             errno == ENOENT || errno == EOPNOTSUPP ||
 454             errno == ENXIO) {
 455                 if (verbose > 0)
 456                         ui__warning("%s event is not supported by the kernel.\n",
 457                                     perf_evsel__name(counter));
 458                 counter->supported = false;
 459                 /*
 460                  * errored is a sticky flag that means one of the counter's
 461                  * cpu event had a problem and needs to be reexamined.
 462                  */
 463                 counter->errored = true;
 464
 465                 if ((counter->leader != counter) ||
 466                     !(counter->leader->core.nr_members > 1))
 467                         return COUNTER_SKIP;
 468         } else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
 469                 if (verbose > 0)
 470                         ui__warning("%s\n", msg);
 471                 return COUNTER_RETRY;
 472         } else if (target__has_per_thread(&target) &&
 473                    evsel_list->core.threads &&
 474                    evsel_list->core.threads->err_thread != -1) {
 475                 /*
 476                  * For global --per-thread case, skip current
 477                  * error thread.
 478                  */
 479                 if (!thread_map__remove(evsel_list->core.threads,
 480                                         evsel_list->core.threads->err_thread)) {
 481                         evsel_list->core.threads->err_thread = -1;
 482                         return COUNTER_RETRY;
 483                 }
 484         }
 485
 486         perf_evsel__open_strerror(counter, &target,
 487                                   errno, msg, sizeof(msg));
 488         ui__error("%s\n", msg);
 489
 490         if (child_pid != -1)
 491                 kill(child_pid, SIGTERM);
 492         return COUNTER_FATAL;
 493 }
 494
 495 static int __run_perf_stat(int argc, const char **argv, int run_idx)
 496 {
 497         int interval = stat_config.interval;
 498         int times = stat_config.times;
 499         int timeout = stat_config.timeout;
 500         char msg[BUFSIZ];
 501         unsigned long long t0, t1;
 502         struct evsel *counter;
 503         struct timespec ts;
 504         size_t l;
 505         int status = 0;
 506         const bool forks = (argc > 0);
 507         bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false;
 508         struct affinity affinity;
 509         int i, cpu;
 510         bool second_pass = false;
 511
 512         if (interval) {
 513                 ts.tv_sec  = interval / USEC_PER_MSEC;
 514                 ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC;
 515         } else if (timeout) {
 516                 ts.tv_sec  = timeout / USEC_PER_MSEC;
 517                 ts.tv_nsec = (timeout % USEC_PER_MSEC) * NSEC_PER_MSEC;
 518         } else {
 519                 ts.tv_sec  = 1;
 520                 ts.tv_nsec = 0;
 521         }
 522
 523         if (forks) {
 524                 if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe,
 525                                                   workload_exec_failed_signal) < 0) {
 526                         perror("failed to prepare workload");
 527                         return -1;
 528                 }
 529                 child_pid = evsel_list->workload.pid;
 530         }
 531
 532         if (group)
 533                 perf_evlist__set_leader(evsel_list);
 534
 535         if (affinity__setup(&affinity) < 0)
 536                 return -1;
 537
 538         evlist__for_each_cpu (evsel_list, i, cpu) {
 539                 affinity__set(&affinity, cpu);
 540
 541                 evlist__for_each_entry(evsel_list, counter) {
 542                         if (evsel__cpu_iter_skip(counter, cpu))
 543                                 continue;
 544                         if (counter->reset_group || counter->errored)
 545                                 continue;
 546 try_again:
 547                         if (create_perf_stat_counter(counter, &stat_config, &target,
 548                                                      counter->cpu_iter - 1) < 0) {
 549
 550                                 /*
 551                                  * Weak group failed. We cannot just undo this here
 552                                  * because earlier CPUs might be in group mode, and the kernel
 553                                  * doesn't support mixing group and non group reads. Defer
 554                                  * it to later.
 555                                  * Don't close here because we're in the wrong affinity.
 556                                  */
 557                                 if ((errno == EINVAL || errno == EBADF) &&
 558                                     counter->leader != counter &&
 559                                     counter->weak_group) {
 560                                         perf_evlist__reset_weak_group(evsel_list, counter, false);
 561                                         assert(counter->reset_group);
 562                                         second_pass = true;
 563                                         continue;
 564                                 }
 565
 566                                 switch (stat_handle_error(counter)) {
 567                                 case COUNTER_FATAL:
 568                                         return -1;
 569                                 case COUNTER_RETRY:
 570                                         goto try_again;
 571                                 case COUNTER_SKIP:
 572                                         continue;
 573                                 default:
 574                                         break;
 575                                 }
 576
 577                         }
 578                         counter->supported = true;
 579                 }
 580         }
 581
 582         if (second_pass) {
 583                 /*
 584                  * Now redo all the weak group after closing them,
 585                  * and also close errored counters.
 586                  */
 587
 588                 evlist__for_each_cpu(evsel_list, i, cpu) {
 589                         affinity__set(&affinity, cpu);
 590                         /* First close errored or weak retry */
 591                         evlist__for_each_entry(evsel_list, counter) {
 592                                 if (!counter->reset_group && !counter->errored)
 593                                         continue;
 594                                 if (evsel__cpu_iter_skip_no_inc(counter, cpu))
 595                                         continue;
 596                                 perf_evsel__close_cpu(&counter->core, counter->cpu_iter);
 597                         }
 598                         /* Now reopen weak */
 599                         evlist__for_each_entry(evsel_list, counter) {
 600                                 if (!counter->reset_group && !counter->errored)
 601                                         continue;
 602                                 if (evsel__cpu_iter_skip(counter, cpu))
 603                                         continue;
 604                                 if (!counter->reset_group)
 605                                         continue;
 606 try_again_reset:
 607                                 pr_debug2("reopening weak %s\n", perf_evsel__name(counter));
 608                                 if (create_perf_stat_counter(counter, &stat_config, &target,
 609                                                              counter->cpu_iter - 1) < 0) {
 610
 611                                         switch (stat_handle_error(counter)) {
 612                                         case COUNTER_FATAL:
 613                                                 return -1;
 614                                         case COUNTER_RETRY:
 615                                                 goto try_again_reset;
 616                                         case COUNTER_SKIP:
 617                                                 continue;
 618                                         default:
 619                                                 break;
 620                                         }
 621                                 }
 622                                 counter->supported = true;
 623                         }
 624                 }
 625         }
 626         affinity__cleanup(&affinity);
 627
 628         evlist__for_each_entry(evsel_list, counter) {
 629                 if (!counter->supported) {
 630                         perf_evsel__free_fd(&counter->core);
 631                         continue;
 632                 }
 633
 634                 l = strlen(counter->unit);
 635                 if (l > stat_config.unit_width)
 636                         stat_config.unit_width = l;
 637
 638                 if (perf_evsel__should_store_id(counter) &&
 639                     perf_evsel__store_ids(counter, evsel_list))
 640                         return -1;
 641         }
 642
 643         if (perf_evlist__apply_filters(evsel_list, &counter)) {
 644                 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
 645                         counter->filter, perf_evsel__name(counter), errno,
 646                         str_error_r(errno, msg, sizeof(msg)));
 647                 return -1;
 648         }
 649
 650         if (STAT_RECORD) {
 651                 int err, fd = perf_data__fd(&perf_stat.data);
 652
 653                 if (is_pipe) {
 654                         err = perf_header__write_pipe(perf_data__fd(&perf_stat.data));
 655                 } else {
 656                         err = perf_session__write_header(perf_stat.session, evsel_list,
 657                                                          fd, false);
 658                 }
 659
 660                 if (err < 0)
 661                         return err;
 662
 663                 err = perf_event__synthesize_stat_events(&stat_config, NULL, evsel_list,
 664                                                          process_synthesized_event, is_pipe);
 665                 if (err < 0)
 666                         return err;
 667         }
 668
 669         /*
 670          * Enable counters and exec the command:
 671          */
 672         t0 = rdclock();
 673         clock_gettime(CLOCK_MONOTONIC, &ref_time);
 674
 675         if (forks) {
 676                 perf_evlist__start_workload(evsel_list);
 677                 enable_counters();
 678
 679                 if (interval || timeout) {
 680                         while (!waitpid(child_pid, &status, WNOHANG)) {
 681                                 nanosleep(&ts, NULL);
 682                                 if (timeout)
 683                                         break;
 684                                 process_interval();
 685                                 if (interval_count && !(--times))
 686                                         break;
 687                         }
 688                 }
 689                 if (child_pid != -1) {
 690                         if (timeout)
 691                                 kill(child_pid, SIGTERM);
 692                         wait4(child_pid, &status, 0, &stat_config.ru_data);
 693                 }
 694
 695                 if (workload_exec_errno) {
 696                         const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
 697                         pr_err("Workload failed: %s\n", emsg);
 698                         return -1;
 699                 }
 700
 701                 if (WIFSIGNALED(status))
 702                         psignal(WTERMSIG(status), argv[0]);
 703         } else {
 704                 enable_counters();
 705                 while (!done) {
 706                         nanosleep(&ts, NULL);
 707                         if (!is_target_alive(&target, evsel_list->core.threads))
 708                                 break;
 709                         if (timeout)
 710                                 break;
 711                         if (interval) {
 712                                 process_interval();
 713                                 if (interval_count && !(--times))
 714                                         break;
 715                         }
 716                 }
 717         }
 718
 719         disable_counters();
 720
 721         t1 = rdclock();
 722
 723         if (stat_config.walltime_run_table)
 724                 stat_config.walltime_run[run_idx] = t1 - t0;
 725
 726         update_stats(&walltime_nsecs_stats, t1 - t0);
 727
 728         /*
 729          * Closing a group leader splits the group, and as we only disable
 730          * group leaders, results in remaining events becoming enabled. To
 731          * avoid arbitrary skew, we must read all counters before closing any
 732          * group leaders.
 733          */
 734         read_counters(&(struct timespec) { .tv_nsec = t1-t0 });
 735
 736         /*
 737          * We need to keep evsel_list alive, because it's processed
 738          * later the evsel_list will be closed after.
 739          */
 740         if (!STAT_RECORD)
 741                 evlist__close(evsel_list);
 742
 743         return WEXITSTATUS(status);
 744 }
 745
 746 static int run_perf_stat(int argc, const char **argv, int run_idx)
 747 {
 748         int ret;
 749
 750         if (pre_cmd) {
 751                 ret = system(pre_cmd);
 752                 if (ret)
 753                         return ret;
 754         }
 755
 756         if (sync_run)
 757                 sync();
 758
 759         ret = __run_perf_stat(argc, argv, run_idx);
 760         if (ret)
 761                 return ret;
 762
 763         if (post_cmd) {
 764                 ret = system(post_cmd);
 765                 if (ret)
 766                         return ret;
 767         }
 768
 769         return ret;
 770 }
 771
 772 static void print_counters(struct timespec *ts, int argc, const char **argv)
 773 {
 774         /* Do not print anything if we record to the pipe. */
 775         if (STAT_RECORD && perf_stat.data.is_pipe)
 776                 return;
 777
 778         perf_evlist__print_counters(evsel_list, &stat_config, &target,
 779                                     ts, argc, argv);
 780 }
 781
 782 static volatile int signr = -1;
 783
 784 static void skip_signal(int signo)
 785 {
 786         if ((child_pid == -1) || stat_config.interval)
 787                 done = 1;
 788
 789         signr = signo;
 790         /*
 791          * render child_pid harmless
 792          * won't send SIGTERM to a random
 793          * process in case of race condition
 794          * and fast PID recycling
 795          */
 796         child_pid = -1;
 797 }
 798
 799 static void sig_atexit(void)
 800 {
 801         sigset_t set, oset;
 802
 803         /*
 804          * avoid race condition with SIGCHLD handler
 805          * in skip_signal() which is modifying child_pid
 806          * goal is to avoid send SIGTERM to a random
 807          * process
 808          */
 809         sigemptyset(&set);
 810         sigaddset(&set, SIGCHLD);
 811         sigprocmask(SIG_BLOCK, &set, &oset);
 812
 813         if (child_pid != -1)
 814                 kill(child_pid, SIGTERM);
 815
 816         sigprocmask(SIG_SETMASK, &oset, NULL);
 817
 818         if (signr == -1)
 819                 return;
 820
 821         signal(signr, SIG_DFL);
 822         kill(getpid(), signr);
 823 }
 824
 825 static int stat__set_big_num(const struct option *opt __maybe_unused,
 826                              const char *s __maybe_unused, int unset)
 827 {
 828         big_num_opt = unset ? 0 : 1;
 829         return 0;
 830 }
 831
 832 static int enable_metric_only(const struct option *opt __maybe_unused,
 833                               const char *s __maybe_unused, int unset)
 834 {
 835         force_metric_only = true;
 836         stat_config.metric_only = !unset;
 837         return 0;
 838 }
 839
 840 static int parse_metric_groups(const struct option *opt,
 841                                const char *str,
 842                                int unset __maybe_unused)
 843 {
 844         return metricgroup__parse_groups(opt, str, &stat_config.metric_events);
 845 }
 846
 847 static struct option stat_options[] = {
 848         OPT_BOOLEAN('T', "transaction", &transaction_run,
 849                     "hardware transaction statistics"),
 850         OPT_CALLBACK('e', "event", &evsel_list, "event",
 851                      "event selector. use 'perf list' to list available events",
 852                      parse_events_option),
 853         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
 854                      "event filter", parse_filter),
 855         OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit,
 856                     "child tasks do not inherit counters"),
 857         OPT_STRING('p', "pid", &target.pid, "pid",
 858                    "stat events on existing process id"),
 859         OPT_STRING('t', "tid", &target.tid, "tid",
 860                    "stat events on existing thread id"),
 861         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
 862                     "system-wide collection from all CPUs"),
 863         OPT_BOOLEAN('g', "group", &group,
 864                     "put the counters into a counter group"),
 865         OPT_BOOLEAN(0, "scale", &stat_config.scale,
 866                     "Use --no-scale to disable counter scaling for multiplexing"),
 867         OPT_INCR('v', "verbose", &verbose,
 868                     "be more verbose (show counter open errors, etc)"),
 869         OPT_INTEGER('r', "repeat", &stat_config.run_count,
 870                     "repeat command and print average + stddev (max: 100, forever: 0)"),
 871         OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table,
 872                     "display details about each run (only with -r option)"),
 873         OPT_BOOLEAN('n', "null", &stat_config.null_run,
 874                     "null run - dont start any counters"),
 875         OPT_INCR('d', "detailed", &detailed_run,
 876                     "detailed run - start a lot of events"),
 877         OPT_BOOLEAN('S', "sync", &sync_run,
 878                     "call sync() before starting a run"),
 879         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
 880                            "print large numbers with thousands\' separators",
 881                            stat__set_big_num),
 882         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
 883                     "list of cpus to monitor in system-wide"),
 884         OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
 885                     "disable CPU count aggregation", AGGR_NONE),
 886         OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"),
 887         OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator",
 888                    "print counts with custom separator"),
 889         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
 890                      "monitor event in cgroup name only", parse_cgroups),
 891         OPT_STRING('o', "output", &output_name, "file", "output file name"),
 892         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
 893         OPT_INTEGER(0, "log-fd", &output_fd,
 894                     "log output to fd, instead of stderr"),
 895         OPT_STRING(0, "pre", &pre_cmd, "command",
 896                         "command to run prior to the measured command"),
 897         OPT_STRING(0, "post", &post_cmd, "command",
 898                         "command to run after to the measured command"),
 899         OPT_UINTEGER('I', "interval-print", &stat_config.interval,
 900                     "print counts at regular interval in ms "
 901                     "(overhead is possible for values <= 100ms)"),
 902         OPT_INTEGER(0, "interval-count", &stat_config.times,
 903                     "print counts for fixed number of times"),
 904         OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear,
 905                     "clear screen in between new interval"),
 906         OPT_UINTEGER(0, "timeout", &stat_config.timeout,
 907                     "stop workload and print counts after a timeout period in ms (>= 10ms)"),
 908         OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
 909                      "aggregate counts per processor socket", AGGR_SOCKET),
 910         OPT_SET_UINT(0, "per-die", &stat_config.aggr_mode,
 911                      "aggregate counts per processor die", AGGR_DIE),
 912         OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
 913                      "aggregate counts per physical processor core", AGGR_CORE),
 914         OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
 915                      "aggregate counts per thread", AGGR_THREAD),
 916         OPT_SET_UINT(0, "per-node", &stat_config.aggr_mode,
 917                      "aggregate counts per numa node", AGGR_NODE),
 918         OPT_UINTEGER('D', "delay", &stat_config.initial_delay,
 919                      "ms to wait before starting measurement after program start"),
 920         OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL,
 921                         "Only print computed metrics. No raw values", enable_metric_only),
 922         OPT_BOOLEAN(0, "topdown", &topdown_run,
 923                         "measure topdown level 1 statistics"),
 924         OPT_BOOLEAN(0, "smi-cost", &smi_cost,
 925                         "measure SMI cost"),
 926         OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
 927                      "monitor specified metrics or metric groups (separated by ,)",
 928                      parse_metric_groups),
 929         OPT_BOOLEAN_FLAG(0, "all-kernel", &stat_config.all_kernel,
 930                          "Configure all used events to run in kernel space.",
 931                          PARSE_OPT_EXCLUSIVE),
 932         OPT_BOOLEAN_FLAG(0, "all-user", &stat_config.all_user,
 933                          "Configure all used events to run in user space.",
 934                          PARSE_OPT_EXCLUSIVE),
 935         OPT_BOOLEAN(0, "percore-show-thread", &stat_config.percore_show_thread,
 936                     "Use with 'percore' event qualifier to show the event "
 937                     "counts of one hardware thread by sum up total hardware "
 938                     "threads of same physical core"),
 939         OPT_END()
 940 };
 941
 942 static int perf_stat__get_socket(struct perf_stat_config *config __maybe_unused,
 943                                  struct perf_cpu_map *map, int cpu)
 944 {
 945         return cpu_map__get_socket(map, cpu, NULL);
 946 }
 947
 948 static int perf_stat__get_die(struct perf_stat_config *config __maybe_unused,
 949                               struct perf_cpu_map *map, int cpu)
 950 {
 951         return cpu_map__get_die(map, cpu, NULL);
 952 }
 953
 954 static int perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
 955                                struct perf_cpu_map *map, int cpu)
 956 {
 957         return cpu_map__get_core(map, cpu, NULL);
 958 }
 959
 960 static int perf_stat__get_node(struct perf_stat_config *config __maybe_unused,
 961                                struct perf_cpu_map *map, int cpu)
 962 {
 963         return cpu_map__get_node(map, cpu, NULL);
 964 }
 965
 966 static int perf_stat__get_aggr(struct perf_stat_config *config,
 967                                aggr_get_id_t get_id, struct perf_cpu_map *map, int idx)
 968 {
 969         int cpu;
 970
 971         if (idx >= map->nr)
 972                 return -1;
 973
 974         cpu = map->map[idx];
 975
 976         if (config->cpus_aggr_map->map[cpu] == -1)
 977                 config->cpus_aggr_map->map[cpu] = get_id(config, map, idx);
 978
 979         return config->cpus_aggr_map->map[cpu];
 980 }
 981
 982 static int perf_stat__get_socket_cached(struct perf_stat_config *config,
 983                                         struct perf_cpu_map *map, int idx)
 984 {
 985         return perf_stat__get_aggr(config, perf_stat__get_socket, map, idx);
 986 }
 987
 988 static int perf_stat__get_die_cached(struct perf_stat_config *config,
 989                                         struct perf_cpu_map *map, int idx)
 990 {
 991         return perf_stat__get_aggr(config, perf_stat__get_die, map, idx);
 992 }
 993
 994 static int perf_stat__get_core_cached(struct perf_stat_config *config,
 995                                       struct perf_cpu_map *map, int idx)
 996 {
 997         return perf_stat__get_aggr(config, perf_stat__get_core, map, idx);
 998 }
 999
1000 static int perf_stat__get_node_cached(struct perf_stat_config *config,
1001                                       struct perf_cpu_map *map, int idx)
1002 {
1003         return perf_stat__get_aggr(config, perf_stat__get_node, map, idx);
1004 }
1005
1006 static bool term_percore_set(void)
1007 {
1008         struct evsel *counter;
1009
1010         evlist__for_each_entry(evsel_list, counter) {
1011                 if (counter->percore)
1012                         return true;
1013         }
1014
1015         return false;
1016 }
1017
1018 static int perf_stat_init_aggr_mode(void)
1019 {
1020         int nr;
1021
1022         switch (stat_config.aggr_mode) {
1023         case AGGR_SOCKET:
1024                 if (cpu_map__build_socket_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1025                         perror("cannot build socket map");
1026                         return -1;
1027                 }
1028                 stat_config.aggr_get_id = perf_stat__get_socket_cached;
1029                 break;
1030         case AGGR_DIE:
1031                 if (cpu_map__build_die_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1032                         perror("cannot build die map");
1033                         return -1;
1034                 }
1035                 stat_config.aggr_get_id = perf_stat__get_die_cached;
1036                 break;
1037         case AGGR_CORE:
1038                 if (cpu_map__build_core_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1039                         perror("cannot build core map");
1040                         return -1;
1041                 }
1042                 stat_config.aggr_get_id = perf_stat__get_core_cached;
1043                 break;
1044         case AGGR_NODE:
1045                 if (cpu_map__build_node_map(evsel_list->core.cpus, &stat_config.aggr_map)) {
1046                         perror("cannot build core map");
1047                         return -1;
1048                 }
1049                 stat_config.aggr_get_id = perf_stat__get_node_cached;
1050                 break;
1051         case AGGR_NONE:
1052                 if (term_percore_set()) {
1053                         if (cpu_map__build_core_map(evsel_list->core.cpus,
1054                                                     &stat_config.aggr_map)) {
1055                                 perror("cannot build core map");
1056                                 return -1;
1057                         }
1058                         stat_config.aggr_get_id = perf_stat__get_core_cached;
1059                 }
1060                 break;
1061         case AGGR_GLOBAL:
1062         case AGGR_THREAD:
1063         case AGGR_UNSET:
1064         default:
1065                 break;
1066         }
1067
1068         /*
1069          * The evsel_list->cpus is the base we operate on,
1070          * taking the highest cpu number to be the size of
1071          * the aggregation translate cpumap.
1072          */
1073         nr = perf_cpu_map__max(evsel_list->core.cpus);
1074         stat_config.cpus_aggr_map = perf_cpu_map__empty_new(nr + 1);
1075         return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
1076 }
1077
1078 static void perf_stat__exit_aggr_mode(void)
1079 {
1080         perf_cpu_map__put(stat_config.aggr_map);
1081         perf_cpu_map__put(stat_config.cpus_aggr_map);
1082         stat_config.aggr_map = NULL;
1083         stat_config.cpus_aggr_map = NULL;
1084 }
1085
1086 static inline int perf_env__get_cpu(struct perf_env *env, struct perf_cpu_map *map, int idx)
1087 {
1088         int cpu;
1089
1090         if (idx > map->nr)
1091                 return -1;
1092
1093         cpu = map->map[idx];
1094
1095         if (cpu >= env->nr_cpus_avail)
1096                 return -1;
1097
1098         return cpu;
1099 }
1100
1101 static int perf_env__get_socket(struct perf_cpu_map *map, int idx, void *data)
1102 {
1103         struct perf_env *env = data;
1104         int cpu = perf_env__get_cpu(env, map, idx);
1105
1106         return cpu == -1 ? -1 : env->cpu[cpu].socket_id;
1107 }
1108
1109 static int perf_env__get_die(struct perf_cpu_map *map, int idx, void *data)
1110 {
1111         struct perf_env *env = data;
1112         int die_id = -1, cpu = perf_env__get_cpu(env, map, idx);
1113
1114         if (cpu != -1) {
1115                 /*
1116                  * Encode socket in bit range 15:8
1117                  * die_id is relative to socket,
1118                  * we need a global id. So we combine
1119                  * socket + die id
1120                  */
1121                 if (WARN_ONCE(env->cpu[cpu].socket_id >> 8, "The socket id number is too big.\n"))
1122                         return -1;
1123
1124                 if (WARN_ONCE(env->cpu[cpu].die_id >> 8, "The die id number is too big.\n"))
1125                         return -1;
1126
1127                 die_id = (env->cpu[cpu].socket_id << 8) | (env->cpu[cpu].die_id & 0xff);
1128         }
1129
1130         return die_id;
1131 }
1132
1133 static int perf_env__get_core(struct perf_cpu_map *map, int idx, void *data)
1134 {
1135         struct perf_env *env = data;
1136         int core = -1, cpu = perf_env__get_cpu(env, map, idx);
1137
1138         if (cpu != -1) {
1139                 /*
1140                  * Encode socket in bit range 31:24
1141                  * encode die id in bit range 23:16
1142                  * core_id is relative to socket and die,
1143                  * we need a global id. So we combine
1144                  * socket + die id + core id
1145                  */
1146                 if (WARN_ONCE(env->cpu[cpu].socket_id >> 8, "The socket id number is too big.\n"))
1147                         return -1;
1148
1149                 if (WARN_ONCE(env->cpu[cpu].die_id >> 8, "The die id number is too big.\n"))
1150                         return -1;
1151
1152                 if (WARN_ONCE(env->cpu[cpu].core_id >> 16, "The core id number is too big.\n"))
1153                         return -1;
1154
1155                 core = (env->cpu[cpu].socket_id << 24) |
1156                        (env->cpu[cpu].die_id << 16) |
1157                        (env->cpu[cpu].core_id & 0xffff);
1158         }
1159
1160         return core;
1161 }
1162
1163 static int perf_env__get_node(struct perf_cpu_map *map, int idx, void *data)
1164 {
1165         int cpu = perf_env__get_cpu(data, map, idx);
1166
1167         return perf_env__numa_node(data, cpu);
1168 }
1169
1170 static int perf_env__build_socket_map(struct perf_env *env, struct perf_cpu_map *cpus,
1171                                       struct perf_cpu_map **sockp)
1172 {
1173         return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
1174 }
1175
1176 static int perf_env__build_die_map(struct perf_env *env, struct perf_cpu_map *cpus,
1177                                    struct perf_cpu_map **diep)
1178 {
1179         return cpu_map__build_map(cpus, diep, perf_env__get_die, env);
1180 }
1181
1182 static int perf_env__build_core_map(struct perf_env *env, struct perf_cpu_map *cpus,
1183                                     struct perf_cpu_map **corep)
1184 {
1185         return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
1186 }
1187
1188 static int perf_env__build_node_map(struct perf_env *env, struct perf_cpu_map *cpus,
1189                                     struct perf_cpu_map **nodep)
1190 {
1191         return cpu_map__build_map(cpus, nodep, perf_env__get_node, env);
1192 }
1193
1194 static int perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused,
1195                                       struct perf_cpu_map *map, int idx)
1196 {
1197         return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
1198 }
1199 static int perf_stat__get_die_file(struct perf_stat_config *config __maybe_unused,
1200                                    struct perf_cpu_map *map, int idx)
1201 {
1202         return perf_env__get_die(map, idx, &perf_stat.session->header.env);
1203 }
1204
1205 static int perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused,
1206                                     struct perf_cpu_map *map, int idx)
1207 {
1208         return perf_env__get_core(map, idx, &perf_stat.session->header.env);
1209 }
1210
1211 static int perf_stat__get_node_file(struct perf_stat_config *config __maybe_unused,
1212                                     struct perf_cpu_map *map, int idx)
1213 {
1214         return perf_env__get_node(map, idx, &perf_stat.session->header.env);
1215 }
1216
1217 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
1218 {
1219         struct perf_env *env = &st->session->header.env;
1220
1221         switch (stat_config.aggr_mode) {
1222         case AGGR_SOCKET:
1223                 if (perf_env__build_socket_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1224                         perror("cannot build socket map");
1225                         return -1;
1226                 }
1227                 stat_config.aggr_get_id = perf_stat__get_socket_file;
1228                 break;
1229         case AGGR_DIE:
1230                 if (perf_env__build_die_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1231                         perror("cannot build die map");
1232                         return -1;
1233                 }
1234                 stat_config.aggr_get_id = perf_stat__get_die_file;
1235                 break;
1236         case AGGR_CORE:
1237                 if (perf_env__build_core_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1238                         perror("cannot build core map");
1239                         return -1;
1240                 }
1241                 stat_config.aggr_get_id = perf_stat__get_core_file;
1242                 break;
1243         case AGGR_NODE:
1244                 if (perf_env__build_node_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) {
1245                         perror("cannot build core map");
1246                         return -1;
1247                 }
1248                 stat_config.aggr_get_id = perf_stat__get_node_file;
1249                 break;
1250         case AGGR_NONE:
1251         case AGGR_GLOBAL:
1252         case AGGR_THREAD:
1253         case AGGR_UNSET:
1254         default:
1255                 break;
1256         }
1257
1258         return 0;
1259 }
1260
1261 static int topdown_filter_events(const char **attr, char **str, bool use_group)
1262 {
1263         int off = 0;
1264         int i;
1265         int len = 0;
1266         char *s;
1267
1268         for (i = 0; attr[i]; i++) {
1269                 if (pmu_have_event("cpu", attr[i])) {
1270                         len += strlen(attr[i]) + 1;
1271                         attr[i - off] = attr[i];
1272                 } else
1273                         off++;
1274         }
1275         attr[i - off] = NULL;
1276
1277         *str = malloc(len + 1 + 2);
1278         if (!*str)
1279                 return -1;
1280         s = *str;
1281         if (i - off == 0) {
1282                 *s = 0;
1283                 return 0;
1284         }
1285         if (use_group)
1286                 *s++ = '{';
1287         for (i = 0; attr[i]; i++) {
1288                 strcpy(s, attr[i]);
1289                 s += strlen(s);
1290                 *s++ = ',';
1291         }
1292         if (use_group) {
1293                 s[-1] = '}';
1294                 *s = 0;
1295         } else
1296                 s[-1] = 0;
1297         return 0;
1298 }
1299
1300 __weak bool arch_topdown_check_group(bool *warn)
1301 {
1302         *warn = false;
1303         return false;
1304 }
1305
1306 __weak void arch_topdown_group_warn(void)
1307 {
1308 }
1309
1310 /*
1311  * Add default attributes, if there were no attributes specified or
1312  * if -d/--detailed, -d -d or -d -d -d is used:
1313  */
1314 static int add_default_attributes(void)
1315 {
1316         int err;
1317         struct perf_event_attr default_attrs0[] = {
1318
1319   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
1320   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
1321   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
1322   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
1323
1324   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
1325 };
1326         struct perf_event_attr frontend_attrs[] = {
1327   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1328 };
1329         struct perf_event_attr backend_attrs[] = {
1330   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
1331 };
1332         struct perf_event_attr default_attrs1[] = {
1333   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
1334   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
1335   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
1336
1337 };
1338
1339 /*
1340  * Detailed stats (-d), covering the L1 and last level data caches:
1341  */
1342         struct perf_event_attr detailed_attrs[] = {
1343
1344   { .type = PERF_TYPE_HW_CACHE,
1345     .config =
1346          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1347         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1348         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1349
1350   { .type = PERF_TYPE_HW_CACHE,
1351     .config =
1352          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1353         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1354         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1355
1356   { .type = PERF_TYPE_HW_CACHE,
1357     .config =
1358          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1359         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1360         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1361
1362   { .type = PERF_TYPE_HW_CACHE,
1363     .config =
1364          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1365         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1366         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1367 };
1368
1369 /*
1370  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1371  */
1372         struct perf_event_attr very_detailed_attrs[] = {
1373
1374   { .type = PERF_TYPE_HW_CACHE,
1375     .config =
1376          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1377         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1378         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1379
1380   { .type = PERF_TYPE_HW_CACHE,
1381     .config =
1382          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1383         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1384         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1385
1386   { .type = PERF_TYPE_HW_CACHE,
1387     .config =
1388          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1389         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1390         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1391
1392   { .type = PERF_TYPE_HW_CACHE,
1393     .config =
1394          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1395         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1396         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1397
1398   { .type = PERF_TYPE_HW_CACHE,
1399     .config =
1400          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1401         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1402         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1403
1404   { .type = PERF_TYPE_HW_CACHE,
1405     .config =
1406          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1407         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1408         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1409
1410 };
1411
1412 /*
1413  * Very, very detailed stats (-d -d -d), adding prefetch events:
1414  */
1415         struct perf_event_attr very_very_detailed_attrs[] = {
1416
1417   { .type = PERF_TYPE_HW_CACHE,
1418     .config =
1419          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1420         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1421         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1422
1423   { .type = PERF_TYPE_HW_CACHE,
1424     .config =
1425          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1426         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1427         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1428 };
1429         struct parse_events_error errinfo;
1430
1431         /* Set attrs if no event is selected and !null_run: */
1432         if (stat_config.null_run)
1433                 return 0;
1434
1435         bzero(&errinfo, sizeof(errinfo));
1436         if (transaction_run) {
1437                 /* Handle -T as -M transaction. Once platform specific metrics
1438                  * support has been added to the json files, all archictures
1439                  * will use this approach. To determine transaction support
1440                  * on an architecture test for such a metric name.
1441                  */
1442                 if (metricgroup__has_metric("transaction")) {
1443                         struct option opt = { .value = &evsel_list };
1444
1445                         return metricgroup__parse_groups(&opt, "transaction",
1446                                                          &stat_config.metric_events);
1447                 }
1448
1449                 if (pmu_have_event("cpu", "cycles-ct") &&
1450                     pmu_have_event("cpu", "el-start"))
1451                         err = parse_events(evsel_list, transaction_attrs,
1452                                            &errinfo);
1453                 else
1454                         err = parse_events(evsel_list,
1455                                            transaction_limited_attrs,
1456                                            &errinfo);
1457                 if (err) {
1458                         fprintf(stderr, "Cannot set up transaction events\n");
1459                         parse_events_print_error(&errinfo, transaction_attrs);
1460                         return -1;
1461                 }
1462                 return 0;
1463         }
1464
1465         if (smi_cost) {
1466                 int smi;
1467
1468                 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
1469                         fprintf(stderr, "freeze_on_smi is not supported.\n");
1470                         return -1;
1471                 }
1472
1473                 if (!smi) {
1474                         if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) {
1475                                 fprintf(stderr, "Failed to set freeze_on_smi.\n");
1476                                 return -1;
1477                         }
1478                         smi_reset = true;
1479                 }
1480
1481                 if (pmu_have_event("msr", "aperf") &&
1482                     pmu_have_event("msr", "smi")) {
1483                         if (!force_metric_only)
1484                                 stat_config.metric_only = true;
1485                         err = parse_events(evsel_list, smi_cost_attrs, &errinfo);
1486                 } else {
1487                         fprintf(stderr, "To measure SMI cost, it needs "
1488                                 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n");
1489                         parse_events_print_error(&errinfo, smi_cost_attrs);
1490                         return -1;
1491                 }
1492                 if (err) {
1493                         parse_events_print_error(&errinfo, smi_cost_attrs);
1494                         fprintf(stderr, "Cannot set up SMI cost events\n");
1495                         return -1;
1496                 }
1497                 return 0;
1498         }
1499
1500         if (topdown_run) {
1501                 char *str = NULL;
1502                 bool warn = false;
1503
1504                 if (stat_config.aggr_mode != AGGR_GLOBAL &&
1505                     stat_config.aggr_mode != AGGR_CORE) {
1506                         pr_err("top down event configuration requires --per-core mode\n");
1507                         return -1;
1508                 }
1509                 stat_config.aggr_mode = AGGR_CORE;
1510                 if (nr_cgroups || !target__has_cpu(&target)) {
1511                         pr_err("top down event configuration requires system-wide mode (-a)\n");
1512                         return -1;
1513                 }
1514
1515                 if (!force_metric_only)
1516                         stat_config.metric_only = true;
1517                 if (topdown_filter_events(topdown_attrs, &str,
1518                                 arch_topdown_check_group(&warn)) < 0) {
1519                         pr_err("Out of memory\n");
1520                         return -1;
1521                 }
1522                 if (topdown_attrs[0] && str) {
1523                         if (warn)
1524                                 arch_topdown_group_warn();
1525                         err = parse_events(evsel_list, str, &errinfo);
1526                         if (err) {
1527                                 fprintf(stderr,
1528                                         "Cannot set up top down events %s: %d\n",
1529                                         str, err);
1530                                 parse_events_print_error(&errinfo, str);
1531                                 free(str);
1532                                 return -1;
1533                         }
1534                 } else {
1535                         fprintf(stderr, "System does not support topdown\n");
1536                         return -1;
1537                 }
1538                 free(str);
1539         }
1540
1541         if (!evsel_list->core.nr_entries) {
1542                 if (target__has_cpu(&target))
1543                         default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
1544
1545                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
1546                         return -1;
1547                 if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
1548                         if (perf_evlist__add_default_attrs(evsel_list,
1549                                                 frontend_attrs) < 0)
1550                                 return -1;
1551                 }
1552                 if (pmu_have_event("cpu", "stalled-cycles-backend")) {
1553                         if (perf_evlist__add_default_attrs(evsel_list,
1554                                                 backend_attrs) < 0)
1555                                 return -1;
1556                 }
1557                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
1558                         return -1;
1559         }
1560
1561         /* Detailed events get appended to the event list: */
1562
1563         if (detailed_run <  1)
1564                 return 0;
1565
1566         /* Append detailed run extra attributes: */
1567         if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1568                 return -1;
1569
1570         if (detailed_run < 2)
1571                 return 0;
1572
1573         /* Append very detailed run extra attributes: */
1574         if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1575                 return -1;
1576
1577         if (detailed_run < 3)
1578                 return 0;
1579
1580         /* Append very, very detailed run extra attributes: */
1581         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1582 }
1583
1584 static const char * const stat_record_usage[] = {
1585         "perf stat record [<options>]",
1586         NULL,
1587 };
1588
1589 static void init_features(struct perf_session *session)
1590 {
1591         int feat;
1592
1593         for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
1594                 perf_header__set_feat(&session->header, feat);
1595
1596         perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT);
1597         perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
1598         perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
1599         perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
1600         perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
1601 }
1602
1603 static int __cmd_record(int argc, const char **argv)
1604 {
1605         struct perf_session *session;
1606         struct perf_data *data = &perf_stat.data;
1607
1608         argc = parse_options(argc, argv, stat_options, stat_record_usage,
1609                              PARSE_OPT_STOP_AT_NON_OPTION);
1610
1611         if (output_name)
1612                 data->path = output_name;
1613
1614         if (stat_config.run_count != 1 || forever) {
1615                 pr_err("Cannot use -r option with perf stat record.\n");
1616                 return -1;
1617         }
1618
1619         session = perf_session__new(data, false, NULL);
1620         if (IS_ERR(session)) {
1621                 pr_err("Perf session creation failed\n");
1622                 return PTR_ERR(session);
1623         }
1624
1625         init_features(session);
1626
1627         session->evlist   = evsel_list;
1628         perf_stat.session = session;
1629         perf_stat.record  = true;
1630         return argc;
1631 }
1632
1633 static int process_stat_round_event(struct perf_session *session,
1634                                     union perf_event *event)
1635 {
1636         struct perf_record_stat_round *stat_round = &event->stat_round;
1637         struct evsel *counter;
1638         struct timespec tsh, *ts = NULL;
1639         const char **argv = session->header.env.cmdline_argv;
1640         int argc = session->header.env.nr_cmdline;
1641
1642         evlist__for_each_entry(evsel_list, counter)
1643                 perf_stat_process_counter(&stat_config, counter);
1644
1645         if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
1646                 update_stats(&walltime_nsecs_stats, stat_round->time);
1647
1648         if (stat_config.interval && stat_round->time) {
1649                 tsh.tv_sec  = stat_round->time / NSEC_PER_SEC;
1650                 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
1651                 ts = &tsh;
1652         }
1653
1654         print_counters(ts, argc, argv);
1655         return 0;
1656 }
1657
1658 static
1659 int process_stat_config_event(struct perf_session *session,
1660                               union perf_event *event)
1661 {
1662         struct perf_tool *tool = session->tool;
1663         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1664
1665         perf_event__read_stat_config(&stat_config, &event->stat_config);
1666
1667         if (perf_cpu_map__empty(st->cpus)) {
1668                 if (st->aggr_mode != AGGR_UNSET)
1669                         pr_warning("warning: processing task data, aggregation mode not set\n");
1670                 return 0;
1671         }
1672
1673         if (st->aggr_mode != AGGR_UNSET)
1674                 stat_config.aggr_mode = st->aggr_mode;
1675
1676         if (perf_stat.data.is_pipe)
1677                 perf_stat_init_aggr_mode();
1678         else
1679                 perf_stat_init_aggr_mode_file(st);
1680
1681         return 0;
1682 }
1683
1684 static int set_maps(struct perf_stat *st)
1685 {
1686         if (!st->cpus || !st->threads)
1687                 return 0;
1688
1689         if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
1690                 return -EINVAL;
1691
1692         perf_evlist__set_maps(&evsel_list->core, st->cpus, st->threads);
1693
1694         if (perf_evlist__alloc_stats(evsel_list, true))
1695                 return -ENOMEM;
1696
1697         st->maps_allocated = true;
1698         return 0;
1699 }
1700
1701 static
1702 int process_thread_map_event(struct perf_session *session,
1703                              union perf_event *event)
1704 {
1705         struct perf_tool *tool = session->tool;
1706         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1707
1708         if (st->threads) {
1709                 pr_warning("Extra thread map event, ignoring.\n");
1710                 return 0;
1711         }
1712
1713         st->threads = thread_map__new_event(&event->thread_map);
1714         if (!st->threads)
1715                 return -ENOMEM;
1716
1717         return set_maps(st);
1718 }
1719
1720 static
1721 int process_cpu_map_event(struct perf_session *session,
1722                           union perf_event *event)
1723 {
1724         struct perf_tool *tool = session->tool;
1725         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1726         struct perf_cpu_map *cpus;
1727
1728         if (st->cpus) {
1729                 pr_warning("Extra cpu map event, ignoring.\n");
1730                 return 0;
1731         }
1732
1733         cpus = cpu_map__new_data(&event->cpu_map.data);
1734         if (!cpus)
1735                 return -ENOMEM;
1736
1737         st->cpus = cpus;
1738         return set_maps(st);
1739 }
1740
1741 static int runtime_stat_new(struct perf_stat_config *config, int nthreads)
1742 {
1743         int i;
1744
1745         config->stats = calloc(nthreads, sizeof(struct runtime_stat));
1746         if (!config->stats)
1747                 return -1;
1748
1749         config->stats_num = nthreads;
1750
1751         for (i = 0; i < nthreads; i++)
1752                 runtime_stat__init(&config->stats[i]);
1753
1754         return 0;
1755 }
1756
1757 static void runtime_stat_delete(struct perf_stat_config *config)
1758 {
1759         int i;
1760
1761         if (!config->stats)
1762                 return;
1763
1764         for (i = 0; i < config->stats_num; i++)
1765                 runtime_stat__exit(&config->stats[i]);
1766
1767         zfree(&config->stats);
1768 }
1769
1770 static const char * const stat_report_usage[] = {
1771         "perf stat report [<options>]",
1772         NULL,
1773 };
1774
1775 static struct perf_stat perf_stat = {
1776         .tool = {
1777                 .attr           = perf_event__process_attr,
1778                 .event_update   = perf_event__process_event_update,
1779                 .thread_map     = process_thread_map_event,
1780                 .cpu_map        = process_cpu_map_event,
1781                 .stat_config    = process_stat_config_event,
1782                 .stat           = perf_event__process_stat_event,
1783                 .stat_round     = process_stat_round_event,
1784         },
1785         .aggr_mode = AGGR_UNSET,
1786 };
1787
1788 static int __cmd_report(int argc, const char **argv)
1789 {
1790         struct perf_session *session;
1791         const struct option options[] = {
1792         OPT_STRING('i', "input", &input_name, "file", "input file name"),
1793         OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
1794                      "aggregate counts per processor socket", AGGR_SOCKET),
1795         OPT_SET_UINT(0, "per-die", &perf_stat.aggr_mode,
1796                      "aggregate counts per processor die", AGGR_DIE),
1797         OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
1798                      "aggregate counts per physical processor core", AGGR_CORE),
1799         OPT_SET_UINT(0, "per-node", &perf_stat.aggr_mode,
1800                      "aggregate counts per numa node", AGGR_NODE),
1801         OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
1802                      "disable CPU count aggregation", AGGR_NONE),
1803         OPT_END()
1804         };
1805         struct stat st;
1806         int ret;
1807
1808         argc = parse_options(argc, argv, options, stat_report_usage, 0);
1809
1810         if (!input_name || !strlen(input_name)) {
1811                 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
1812                         input_name = "-";
1813                 else
1814                         input_name = "perf.data";
1815         }
1816
1817         perf_stat.data.path = input_name;
1818         perf_stat.data.mode = PERF_DATA_MODE_READ;
1819
1820         session = perf_session__new(&perf_stat.data, false, &perf_stat.tool);
1821         if (IS_ERR(session))
1822                 return PTR_ERR(session);
1823
1824         perf_stat.session  = session;
1825         stat_config.output = stderr;
1826         evsel_list         = session->evlist;
1827
1828         ret = perf_session__process_events(session);
1829         if (ret)
1830                 return ret;
1831
1832         perf_session__delete(session);
1833         return 0;
1834 }
1835
1836 static void setup_system_wide(int forks)
1837 {
1838         /*
1839          * Make system wide (-a) the default target if
1840          * no target was specified and one of following
1841          * conditions is met:
1842          *
1843          *   - there's no workload specified
1844          *   - there is workload specified but all requested
1845          *     events are system wide events
1846          */
1847         if (!target__none(&target))
1848                 return;
1849
1850         if (!forks)
1851                 target.system_wide = true;
1852         else {
1853                 struct evsel *counter;
1854
1855                 evlist__for_each_entry(evsel_list, counter) {
1856                         if (!counter->core.system_wide)
1857                                 return;
1858                 }
1859
1860                 if (evsel_list->core.nr_entries)
1861                         target.system_wide = true;
1862         }
1863 }
1864
1865 int cmd_stat(int argc, const char **argv)
1866 {
1867         const char * const stat_usage[] = {
1868                 "perf stat [<options>] [<command>]",
1869                 NULL
1870         };
1871         int status = -EINVAL, run_idx;
1872         const char *mode;
1873         FILE *output = stderr;
1874         unsigned int interval, timeout;
1875         const char * const stat_subcommands[] = { "record", "report" };
1876
1877         setlocale(LC_ALL, "");
1878
1879         evsel_list = evlist__new();
1880         if (evsel_list == NULL)
1881                 return -ENOMEM;
1882
1883         parse_events__shrink_config_terms();
1884
1885         /* String-parsing callback-based options would segfault when negated */
1886         set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG);
1887         set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG);
1888         set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG);
1889
1890         argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
1891                                         (const char **) stat_usage,
1892                                         PARSE_OPT_STOP_AT_NON_OPTION);
1893         perf_stat__collect_metric_expr(evsel_list);
1894         perf_stat__init_shadow_stats();
1895
1896         if (stat_config.csv_sep) {
1897                 stat_config.csv_output = true;
1898                 if (!strcmp(stat_config.csv_sep, "\\t"))
1899                         stat_config.csv_sep = "\t";
1900         } else
1901                 stat_config.csv_sep = DEFAULT_SEPARATOR;
1902
1903         if (argc && !strncmp(argv[0], "rec", 3)) {
1904                 argc = __cmd_record(argc, argv);
1905                 if (argc < 0)
1906                         return -1;
1907         } else if (argc && !strncmp(argv[0], "rep", 3))
1908                 return __cmd_report(argc, argv);
1909
1910         interval = stat_config.interval;
1911         timeout = stat_config.timeout;
1912
1913         /*
1914          * For record command the -o is already taken care of.
1915          */
1916         if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
1917                 output = NULL;
1918
1919         if (output_name && output_fd) {
1920                 fprintf(stderr, "cannot use both --output and --log-fd\n");
1921                 parse_options_usage(stat_usage, stat_options, "o", 1);
1922                 parse_options_usage(NULL, stat_options, "log-fd", 0);
1923                 goto out;
1924         }
1925
1926         if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) {
1927                 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
1928                 goto out;
1929         }
1930
1931         if (stat_config.metric_only && stat_config.run_count > 1) {
1932                 fprintf(stderr, "--metric-only is not supported with -r\n");
1933                 goto out;
1934         }
1935
1936         if (stat_config.walltime_run_table && stat_config.run_count <= 1) {
1937                 fprintf(stderr, "--table is only supported with -r\n");
1938                 parse_options_usage(stat_usage, stat_options, "r", 1);
1939                 parse_options_usage(NULL, stat_options, "table", 0);
1940                 goto out;
1941         }
1942
1943         if (output_fd < 0) {
1944                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1945                 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
1946                 goto out;
1947         }
1948
1949         if (!output) {
1950                 struct timespec tm;
1951                 mode = append_file ? "a" : "w";
1952
1953                 output = fopen(output_name, mode);
1954                 if (!output) {
1955                         perror("failed to create output file");
1956                         return -1;
1957                 }
1958                 clock_gettime(CLOCK_REALTIME, &tm);
1959                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1960         } else if (output_fd > 0) {
1961                 mode = append_file ? "a" : "w";
1962                 output = fdopen(output_fd, mode);
1963                 if (!output) {
1964                         perror("Failed opening logfd");
1965                         return -errno;
1966                 }
1967         }
1968
1969         stat_config.output = output;
1970
1971         /*
1972          * let the spreadsheet do the pretty-printing
1973          */
1974         if (stat_config.csv_output) {
1975                 /* User explicitly passed -B? */
1976                 if (big_num_opt == 1) {
1977                         fprintf(stderr, "-B option not supported with -x\n");
1978                         parse_options_usage(stat_usage, stat_options, "B", 1);
1979                         parse_options_usage(NULL, stat_options, "x", 1);
1980                         goto out;
1981                 } else /* Nope, so disable big number formatting */
1982                         stat_config.big_num = false;
1983         } else if (big_num_opt == 0) /* User passed --no-big-num */
1984                 stat_config.big_num = false;
1985
1986         setup_system_wide(argc);
1987
1988         /*
1989          * Display user/system times only for single
1990          * run and when there's specified tracee.
1991          */
1992         if ((stat_config.run_count == 1) && target__none(&target))
1993                 stat_config.ru_display = true;
1994
1995         if (stat_config.run_count < 0) {
1996                 pr_err("Run count must be a positive number\n");
1997                 parse_options_usage(stat_usage, stat_options, "r", 1);
1998                 goto out;
1999         } else if (stat_config.run_count == 0) {
2000                 forever = true;
2001                 stat_config.run_count = 1;
2002         }
2003
2004         if (stat_config.walltime_run_table) {
2005                 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0]));
2006                 if (!stat_config.walltime_run) {
2007                         pr_err("failed to setup -r option");
2008                         goto out;
2009                 }
2010         }
2011
2012         if ((stat_config.aggr_mode == AGGR_THREAD) &&
2013                 !target__has_task(&target)) {
2014                 if (!target.system_wide || target.cpu_list) {
2015                         fprintf(stderr, "The --per-thread option is only "
2016                                 "available when monitoring via -p -t -a "
2017                                 "options or only --per-thread.\n");
2018                         parse_options_usage(NULL, stat_options, "p", 1);
2019                         parse_options_usage(NULL, stat_options, "t", 1);
2020                         goto out;
2021                 }
2022         }
2023
2024         /*
2025          * no_aggr, cgroup are for system-wide only
2026          * --per-thread is aggregated per thread, we dont mix it with cpu mode
2027          */
2028         if (((stat_config.aggr_mode != AGGR_GLOBAL &&
2029               stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
2030             !target__has_cpu(&target)) {
2031                 fprintf(stderr, "both cgroup and no-aggregation "
2032                         "modes only available in system-wide mode\n");
2033
2034                 parse_options_usage(stat_usage, stat_options, "G", 1);
2035                 parse_options_usage(NULL, stat_options, "A", 1);
2036                 parse_options_usage(NULL, stat_options, "a", 1);
2037                 goto out;
2038         }
2039
2040         if (add_default_attributes())
2041                 goto out;
2042
2043         target__validate(&target);
2044
2045         if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
2046                 target.per_thread = true;
2047
2048         if (perf_evlist__create_maps(evsel_list, &target) < 0) {
2049                 if (target__has_task(&target)) {
2050                         pr_err("Problems finding threads of monitor\n");
2051                         parse_options_usage(stat_usage, stat_options, "p", 1);
2052                         parse_options_usage(NULL, stat_options, "t", 1);
2053                 } else if (target__has_cpu(&target)) {
2054                         perror("failed to parse CPUs map");
2055                         parse_options_usage(stat_usage, stat_options, "C", 1);
2056                         parse_options_usage(NULL, stat_options, "a", 1);
2057                 }
2058                 goto out;
2059         }
2060
2061         /*
2062          * Initialize thread_map with comm names,
2063          * so we could print it out on output.
2064          */
2065         if (stat_config.aggr_mode == AGGR_THREAD) {
2066                 thread_map__read_comms(evsel_list->core.threads);
2067                 if (target.system_wide) {
2068                         if (runtime_stat_new(&stat_config,
2069                                 perf_thread_map__nr(evsel_list->core.threads))) {
2070                                 goto out;
2071                         }
2072                 }
2073         }
2074
2075         if (stat_config.aggr_mode == AGGR_NODE)
2076                 cpu__setup_cpunode_map();
2077
2078         if (stat_config.times && interval)
2079                 interval_count = true;
2080         else if (stat_config.times && !interval) {
2081                 pr_err("interval-count option should be used together with "
2082                                 "interval-print.\n");
2083                 parse_options_usage(stat_usage, stat_options, "interval-count", 0);
2084                 parse_options_usage(stat_usage, stat_options, "I", 1);
2085                 goto out;
2086         }
2087
2088         if (timeout && timeout < 100) {
2089                 if (timeout < 10) {
2090                         pr_err("timeout must be >= 10ms.\n");
2091                         parse_options_usage(stat_usage, stat_options, "timeout", 0);
2092                         goto out;
2093                 } else
2094                         pr_warning("timeout < 100ms. "
2095                                    "The overhead percentage could be high in some cases. "
2096                                    "Please proceed with caution.\n");
2097         }
2098         if (timeout && interval) {
2099                 pr_err("timeout option is not supported with interval-print.\n");
2100                 parse_options_usage(stat_usage, stat_options, "timeout", 0);
2101                 parse_options_usage(stat_usage, stat_options, "I", 1);
2102                 goto out;
2103         }
2104
2105         if (perf_evlist__alloc_stats(evsel_list, interval))
2106                 goto out;
2107
2108         if (perf_stat_init_aggr_mode())
2109                 goto out;
2110
2111         /*
2112          * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
2113          * while avoiding that older tools show confusing messages.
2114          *
2115          * However for pipe sessions we need to keep it zero,
2116          * because script's perf_evsel__check_attr is triggered
2117          * by attr->sample_type != 0, and we can't run it on
2118          * stat sessions.
2119          */
2120         stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe);
2121
2122         /*
2123          * We dont want to block the signals - that would cause
2124          * child tasks to inherit that and Ctrl-C would not work.
2125          * What we want is for Ctrl-C to work in the exec()-ed
2126          * task, but being ignored by perf stat itself:
2127          */
2128         atexit(sig_atexit);
2129         if (!forever)
2130                 signal(SIGINT,  skip_signal);
2131         signal(SIGCHLD, skip_signal);
2132         signal(SIGALRM, skip_signal);
2133         signal(SIGABRT, skip_signal);
2134
2135         status = 0;
2136         for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) {
2137                 if (stat_config.run_count != 1 && verbose > 0)
2138                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
2139                                 run_idx + 1);
2140
2141                 if (run_idx != 0)
2142                         perf_evlist__reset_prev_raw_counts(evsel_list);
2143
2144                 status = run_perf_stat(argc, argv, run_idx);
2145                 if (forever && status != -1 && !interval) {
2146                         print_counters(NULL, argc, argv);
2147                         perf_stat__reset_stats();
2148                 }
2149         }
2150
2151         if (!forever && status != -1 && !interval)
2152                 print_counters(NULL, argc, argv);
2153
2154         if (STAT_RECORD) {
2155                 /*
2156                  * We synthesize the kernel mmap record just so that older tools
2157                  * don't emit warnings about not being able to resolve symbols
2158                  * due to /proc/sys/kernel/kptr_restrict settings and instear provide
2159                  * a saner message about no samples being in the perf.data file.
2160                  *
2161                  * This also serves to suppress a warning about f_header.data.size == 0
2162                  * in header.c at the moment 'perf stat record' gets introduced, which
2163                  * is not really needed once we start adding the stat specific PERF_RECORD_
2164                  * records, but the need to suppress the kptr_restrict messages in older
2165                  * tools remain  -acme
2166                  */
2167                 int fd = perf_data__fd(&perf_stat.data);
2168                 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
2169                                                              process_synthesized_event,
2170                                                              &perf_stat.session->machines.host);
2171                 if (err) {
2172                         pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
2173                                    "older tools may produce warnings about this file\n.");
2174                 }
2175
2176                 if (!interval) {
2177                         if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
2178                                 pr_err("failed to write stat round event\n");
2179                 }
2180
2181                 if (!perf_stat.data.is_pipe) {
2182                         perf_stat.session->header.data_size += perf_stat.bytes_written;
2183                         perf_session__write_header(perf_stat.session, evsel_list, fd, true);
2184                 }
2185
2186                 evlist__close(evsel_list);
2187                 perf_session__delete(perf_stat.session);
2188         }
2189
2190         perf_stat__exit_aggr_mode();
2191         perf_evlist__free_stats(evsel_list);
2192 out:
2193         zfree(&stat_config.walltime_run);
2194
2195         if (smi_cost && smi_reset)
2196                 sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
2197
2198         evlist__delete(evsel_list);
2199
2200         runtime_stat_delete(&stat_config);
2201
2202         return status;
2203 }