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