tools/perf/builtin-stat.c

   1 /*
   2  * builtin-stat.c
   3  *
   4  * Builtin stat command: Give a precise performance counters summary
   5  * overview about any workload, CPU or specific PID.
   6  *
   7  * Sample output:
   8
   9    $ perf stat ./hackbench 10
  10
  11   Time: 0.118
  12
  13   Performance counter stats for './hackbench 10':
  14
  15        1708.761321 task-clock                #   11.037 CPUs utilized
  16             41,190 context-switches          #    0.024 M/sec
  17              6,735 CPU-migrations            #    0.004 M/sec
  18             17,318 page-faults               #    0.010 M/sec
  19      5,205,202,243 cycles                    #    3.046 GHz
  20      3,856,436,920 stalled-cycles-frontend   #   74.09% frontend cycles idle
  21      1,600,790,871 stalled-cycles-backend    #   30.75% backend  cycles idle
  22      2,603,501,247 instructions              #    0.50  insns per cycle
  23                                              #    1.48  stalled cycles per insn
  24        484,357,498 branches                  #  283.455 M/sec
  25          6,388,934 branch-misses             #    1.32% of all branches
  26
  27         0.154822978  seconds time elapsed
  28
  29  *
  30  * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com>
  31  *
  32  * Improvements and fixes by:
  33  *
  34  *   Arjan van de Ven <arjan@linux.intel.com>
  35  *   Yanmin Zhang <yanmin.zhang@intel.com>
  36  *   Wu Fengguang <fengguang.wu@intel.com>
  37  *   Mike Galbraith <efault@gmx.de>
  38  *   Paul Mackerras <paulus@samba.org>
  39  *   Jaswinder Singh Rajput <jaswinder@kernel.org>
  40  *
  41  * Released under the GPL v2. (and only v2, not any later version)
  42  */
  43
  44 #include "perf.h"
  45 #include "builtin.h"
  46 #include "util/cgroup.h"
  47 #include "util/util.h"
  48 #include <subcmd/parse-options.h>
  49 #include "util/parse-events.h"
  50 #include "util/pmu.h"
  51 #include "util/event.h"
  52 #include "util/evlist.h"
  53 #include "util/evsel.h"
  54 #include "util/debug.h"
  55 #include "util/color.h"
  56 #include "util/stat.h"
  57 #include "util/header.h"
  58 #include "util/cpumap.h"
  59 #include "util/thread.h"
  60 #include "util/thread_map.h"
  61 #include "util/counts.h"
  62 #include "util/group.h"
  63 #include "util/session.h"
  64 #include "util/tool.h"
  65 #include "util/string2.h"
  66 #include "util/metricgroup.h"
  67 #include "util/top.h"
  68 #include "asm/bug.h"
  69
  70 #include <linux/time64.h>
  71 #include <api/fs/fs.h>
  72 #include <errno.h>
  73 #include <signal.h>
  74 #include <stdlib.h>
  75 #include <sys/prctl.h>
  76 #include <inttypes.h>
  77 #include <locale.h>
  78 #include <math.h>
  79 #include <sys/types.h>
  80 #include <sys/stat.h>
  81 #include <sys/wait.h>
  82 #include <unistd.h>
  83 #include <sys/time.h>
  84 #include <sys/resource.h>
  85
  86 #include "sane_ctype.h"
  87
  88 #define DEFAULT_SEPARATOR       " "
  89 #define FREEZE_ON_SMI_PATH      "devices/cpu/freeze_on_smi"
  90
  91 static void print_counters(struct timespec *ts, int argc, const char **argv);
  92
  93 /* Default events used for perf stat -T */
  94 static const char *transaction_attrs = {
  95         "task-clock,"
  96         "{"
  97         "instructions,"
  98         "cycles,"
  99         "cpu/cycles-t/,"
 100         "cpu/tx-start/,"
 101         "cpu/el-start/,"
 102         "cpu/cycles-ct/"
 103         "}"
 104 };
 105
 106 /* More limited version when the CPU does not have all events. */
 107 static const char * transaction_limited_attrs = {
 108         "task-clock,"
 109         "{"
 110         "instructions,"
 111         "cycles,"
 112         "cpu/cycles-t/,"
 113         "cpu/tx-start/"
 114         "}"
 115 };
 116
 117 static const char * topdown_attrs[] = {
 118         "topdown-total-slots",
 119         "topdown-slots-retired",
 120         "topdown-recovery-bubbles",
 121         "topdown-fetch-bubbles",
 122         "topdown-slots-issued",
 123         NULL,
 124 };
 125
 126 static const char *smi_cost_attrs = {
 127         "{"
 128         "msr/aperf/,"
 129         "msr/smi/,"
 130         "cycles"
 131         "}"
 132 };
 133
 134 static struct perf_evlist       *evsel_list;
 135
 136 static struct target target = {
 137         .uid    = UINT_MAX,
 138 };
 139
 140 #define METRIC_ONLY_LEN 20
 141
 142 static volatile pid_t           child_pid                       = -1;
 143 static int                      detailed_run                    =  0;
 144 static bool                     transaction_run;
 145 static bool                     topdown_run                     = false;
 146 static bool                     smi_cost                        = false;
 147 static bool                     smi_reset                       = false;
 148 static int                      big_num_opt                     =  -1;
 149 static bool                     group                           = false;
 150 static const char               *pre_cmd                        = NULL;
 151 static const char               *post_cmd                       = NULL;
 152 static bool                     sync_run                        = false;
 153 static bool                     forever                         = false;
 154 static bool                     force_metric_only               = false;
 155 static struct timespec          ref_time;
 156 static bool                     append_file;
 157 static bool                     interval_count;
 158 static const char               *output_name;
 159 static int                      output_fd;
 160
 161 struct perf_stat {
 162         bool                     record;
 163         struct perf_data         data;
 164         struct perf_session     *session;
 165         u64                      bytes_written;
 166         struct perf_tool         tool;
 167         bool                     maps_allocated;
 168         struct cpu_map          *cpus;
 169         struct thread_map       *threads;
 170         enum aggr_mode           aggr_mode;
 171 };
 172
 173 static struct perf_stat         perf_stat;
 174 #define STAT_RECORD             perf_stat.record
 175
 176 static volatile int done = 0;
 177
 178 static struct perf_stat_config stat_config = {
 179         .aggr_mode              = AGGR_GLOBAL,
 180         .scale                  = true,
 181         .unit_width             = 4, /* strlen("unit") */
 182         .run_count              = 1,
 183         .metric_only_len        = METRIC_ONLY_LEN,
 184         .walltime_nsecs_stats   = &walltime_nsecs_stats,
 185         .big_num                = true,
 186 };
 187
 188 static inline void diff_timespec(struct timespec *r, struct timespec *a,
 189                                  struct timespec *b)
 190 {
 191         r->tv_sec = a->tv_sec - b->tv_sec;
 192         if (a->tv_nsec < b->tv_nsec) {
 193                 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec;
 194                 r->tv_sec--;
 195         } else {
 196                 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
 197         }
 198 }
 199
 200 static void perf_stat__reset_stats(void)
 201 {
 202         int i;
 203
 204         perf_evlist__reset_stats(evsel_list);
 205         perf_stat__reset_shadow_stats();
 206
 207         for (i = 0; i < stat_config.stats_num; i++)
 208                 perf_stat__reset_shadow_per_stat(&stat_config.stats[i]);
 209 }
 210
 211 static int process_synthesized_event(struct perf_tool *tool __maybe_unused,
 212                                      union perf_event *event,
 213                                      struct perf_sample *sample __maybe_unused,
 214                                      struct machine *machine __maybe_unused)
 215 {
 216         if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) {
 217                 pr_err("failed to write perf data, error: %m\n");
 218                 return -1;
 219         }
 220
 221         perf_stat.bytes_written += event->header.size;
 222         return 0;
 223 }
 224
 225 static int write_stat_round_event(u64 tm, u64 type)
 226 {
 227         return perf_event__synthesize_stat_round(NULL, tm, type,
 228                                                  process_synthesized_event,
 229                                                  NULL);
 230 }
 231
 232 #define WRITE_STAT_ROUND_EVENT(time, interval) \
 233         write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval)
 234
 235 #define SID(e, x, y) xyarray__entry(e->sample_id, x, y)
 236
 237 static int
 238 perf_evsel__write_stat_event(struct perf_evsel *counter, u32 cpu, u32 thread,
 239                              struct perf_counts_values *count)
 240 {
 241         struct perf_sample_id *sid = SID(counter, cpu, thread);
 242
 243         return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count,
 244                                            process_synthesized_event, NULL);
 245 }
 246
 247 static int read_single_counter(struct perf_evsel *counter, int cpu,
 248                                int thread, struct timespec *rs)
 249 {
 250         if (counter->tool_event == PERF_TOOL_DURATION_TIME) {
 251                 u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL;
 252                 struct perf_counts_values *count =
 253                         perf_counts(counter->counts, cpu, thread);
 254                 count->ena = count->run = val;
 255                 count->val = val;
 256                 return 0;
 257         }
 258         return perf_evsel__read_counter(counter, cpu, thread);
 259 }
 260
 261 /*
 262  * Read out the results of a single counter:
 263  * do not aggregate counts across CPUs in system-wide mode
 264  */
 265 static int read_counter(struct perf_evsel *counter, struct timespec *rs)
 266 {
 267         int nthreads = thread_map__nr(evsel_list->threads);
 268         int ncpus, cpu, thread;
 269
 270         if (target__has_cpu(&target) && !target__has_per_thread(&target))
 271                 ncpus = perf_evsel__nr_cpus(counter);
 272         else
 273                 ncpus = 1;
 274
 275         if (!counter->supported)
 276                 return -ENOENT;
 277
 278         if (counter->system_wide)
 279                 nthreads = 1;
 280
 281         for (thread = 0; thread < nthreads; thread++) {
 282                 for (cpu = 0; cpu < ncpus; cpu++) {
 283                         struct perf_counts_values *count;
 284
 285                         count = perf_counts(counter->counts, cpu, thread);
 286
 287                         /*
 288                          * The leader's group read loads data into its group members
 289                          * (via perf_evsel__read_counter) and sets threir count->loaded.
 290                          */
 291                         if (!count->loaded &&
 292                             read_single_counter(counter, cpu, thread, rs)) {
 293                                 counter->counts->scaled = -1;
 294                                 perf_counts(counter->counts, cpu, thread)->ena = 0;
 295                                 perf_counts(counter->counts, cpu, thread)->run = 0;
 296                                 return -1;
 297                         }
 298
 299                         count->loaded = false;
 300
 301                         if (STAT_RECORD) {
 302                                 if (perf_evsel__write_stat_event(counter, cpu, thread, count)) {
 303                                         pr_err("failed to write stat event\n");
 304                                         return -1;
 305                                 }
 306                         }
 307
 308                         if (verbose > 1) {
 309                                 fprintf(stat_config.output,
 310                                         "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 311                                                 perf_evsel__name(counter),
 312                                                 cpu,
 313                                                 count->val, count->ena, count->run);
 314                         }
 315                 }
 316         }
 317
 318         return 0;
 319 }
 320
 321 static void read_counters(struct timespec *rs)
 322 {
 323         struct perf_evsel *counter;
 324         int ret;
 325
 326         evlist__for_each_entry(evsel_list, counter) {
 327                 ret = read_counter(counter, rs);
 328                 if (ret)
 329                         pr_debug("failed to read counter %s\n", counter->name);
 330
 331                 if (ret == 0 && perf_stat_process_counter(&stat_config, counter))
 332                         pr_warning("failed to process counter %s\n", counter->name);
 333         }
 334 }
 335
 336 static void process_interval(void)
 337 {
 338         struct timespec ts, rs;
 339
 340         clock_gettime(CLOCK_MONOTONIC, &ts);
 341         diff_timespec(&rs, &ts, &ref_time);
 342
 343         read_counters(&rs);
 344
 345         if (STAT_RECORD) {
 346                 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL))
 347                         pr_err("failed to write stat round event\n");
 348         }
 349
 350         init_stats(&walltime_nsecs_stats);
 351         update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000);
 352         print_counters(&rs, 0, NULL);
 353 }
 354
 355 static void enable_counters(void)
 356 {
 357         if (stat_config.initial_delay)
 358                 usleep(stat_config.initial_delay * USEC_PER_MSEC);
 359
 360         /*
 361          * We need to enable counters only if:
 362          * - we don't have tracee (attaching to task or cpu)
 363          * - we have initial delay configured
 364          */
 365         if (!target__none(&target) || stat_config.initial_delay)
 366                 perf_evlist__enable(evsel_list);
 367 }
 368
 369 static void disable_counters(void)
 370 {
 371         /*
 372          * If we don't have tracee (attaching to task or cpu), counters may
 373          * still be running. To get accurate group ratios, we must stop groups
 374          * from counting before reading their constituent counters.
 375          */
 376         if (!target__none(&target))
 377                 perf_evlist__disable(evsel_list);
 378 }
 379
 380 static volatile int workload_exec_errno;
 381
 382 /*
 383  * perf_evlist__prepare_workload will send a SIGUSR1
 384  * if the fork fails, since we asked by setting its
 385  * want_signal to true.
 386  */
 387 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
 388                                         void *ucontext __maybe_unused)
 389 {
 390         workload_exec_errno = info->si_value.sival_int;
 391 }
 392
 393 static bool perf_evsel__should_store_id(struct perf_evsel *counter)
 394 {
 395         return STAT_RECORD || counter->attr.read_format & PERF_FORMAT_ID;
 396 }
 397
 398 static bool is_target_alive(struct target *_target,
 399                             struct thread_map *threads)
 400 {
 401         struct stat st;
 402         int i;
 403
 404         if (!target__has_task(_target))
 405                 return true;
 406
 407         for (i = 0; i < threads->nr; i++) {
 408                 char path[PATH_MAX];
 409
 410                 scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(),
 411                           threads->map[i].pid);
 412
 413                 if (!stat(path, &st))
 414                         return true;
 415         }
 416
 417         return false;
 418 }
 419
 420 static int __run_perf_stat(int argc, const char **argv, int run_idx)
 421 {
 422         int interval = stat_config.interval;
 423         int times = stat_config.times;
 424         int timeout = stat_config.timeout;
 425         char msg[BUFSIZ];
 426         unsigned long long t0, t1;
 427         struct perf_evsel *counter;
 428         struct timespec ts;
 429         size_t l;
 430         int status = 0;
 431         const bool forks = (argc > 0);
 432         bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false;
 433
 434         if (interval) {
 435                 ts.tv_sec  = interval / USEC_PER_MSEC;
 436                 ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC;
 437         } else if (timeout) {
 438                 ts.tv_sec  = timeout / USEC_PER_MSEC;
 439                 ts.tv_nsec = (timeout % USEC_PER_MSEC) * NSEC_PER_MSEC;
 440         } else {
 441                 ts.tv_sec  = 1;
 442                 ts.tv_nsec = 0;
 443         }
 444
 445         if (forks) {
 446                 if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe,
 447                                                   workload_exec_failed_signal) < 0) {
 448                         perror("failed to prepare workload");
 449                         return -1;
 450                 }
 451                 child_pid = evsel_list->workload.pid;
 452         }
 453
 454         if (group)
 455                 perf_evlist__set_leader(evsel_list);
 456
 457         evlist__for_each_entry(evsel_list, counter) {
 458 try_again:
 459                 if (create_perf_stat_counter(counter, &stat_config, &target) < 0) {
 460
 461                         /* Weak group failed. Reset the group. */
 462                         if ((errno == EINVAL || errno == EBADF) &&
 463                             counter->leader != counter &&
 464                             counter->weak_group) {
 465                                 counter = perf_evlist__reset_weak_group(evsel_list, counter);
 466                                 goto try_again;
 467                         }
 468
 469                         /*
 470                          * PPC returns ENXIO for HW counters until 2.6.37
 471                          * (behavior changed with commit b0a873e).
 472                          */
 473                         if (errno == EINVAL || errno == ENOSYS ||
 474                             errno == ENOENT || errno == EOPNOTSUPP ||
 475                             errno == ENXIO) {
 476                                 if (verbose > 0)
 477                                         ui__warning("%s event is not supported by the kernel.\n",
 478                                                     perf_evsel__name(counter));
 479                                 counter->supported = false;
 480
 481                                 if ((counter->leader != counter) ||
 482                                     !(counter->leader->nr_members > 1))
 483                                         continue;
 484                         } else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
 485                                 if (verbose > 0)
 486                                         ui__warning("%s\n", msg);
 487                                 goto try_again;
 488                         } else if (target__has_per_thread(&target) &&
 489                                    evsel_list->threads &&
 490                                    evsel_list->threads->err_thread != -1) {
 491                                 /*
 492                                  * For global --per-thread case, skip current
 493                                  * error thread.
 494                                  */
 495                                 if (!thread_map__remove(evsel_list->threads,
 496                                                         evsel_list->threads->err_thread)) {
 497                                         evsel_list->threads->err_thread = -1;
 498                                         goto try_again;
 499                                 }
 500                         }
 501
 502                         perf_evsel__open_strerror(counter, &target,
 503                                                   errno, msg, sizeof(msg));
 504                         ui__error("%s\n", msg);
 505
 506                         if (child_pid != -1)
 507                                 kill(child_pid, SIGTERM);
 508
 509                         return -1;
 510                 }
 511                 counter->supported = true;
 512
 513                 l = strlen(counter->unit);
 514                 if (l > stat_config.unit_width)
 515                         stat_config.unit_width = l;
 516
 517                 if (perf_evsel__should_store_id(counter) &&
 518                     perf_evsel__store_ids(counter, evsel_list))
 519                         return -1;
 520         }
 521
 522         if (perf_evlist__apply_filters(evsel_list, &counter)) {
 523                 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
 524                         counter->filter, perf_evsel__name(counter), errno,
 525                         str_error_r(errno, msg, sizeof(msg)));
 526                 return -1;
 527         }
 528
 529         if (STAT_RECORD) {
 530                 int err, fd = perf_data__fd(&perf_stat.data);
 531
 532                 if (is_pipe) {
 533                         err = perf_header__write_pipe(perf_data__fd(&perf_stat.data));
 534                 } else {
 535                         err = perf_session__write_header(perf_stat.session, evsel_list,
 536                                                          fd, false);
 537                 }
 538
 539                 if (err < 0)
 540                         return err;
 541
 542                 err = perf_stat_synthesize_config(&stat_config, NULL, evsel_list,
 543                                                   process_synthesized_event, is_pipe);
 544                 if (err < 0)
 545                         return err;
 546         }
 547
 548         /*
 549          * Enable counters and exec the command:
 550          */
 551         t0 = rdclock();
 552         clock_gettime(CLOCK_MONOTONIC, &ref_time);
 553
 554         if (forks) {
 555                 perf_evlist__start_workload(evsel_list);
 556                 enable_counters();
 557
 558                 if (interval || timeout) {
 559                         while (!waitpid(child_pid, &status, WNOHANG)) {
 560                                 nanosleep(&ts, NULL);
 561                                 if (timeout)
 562                                         break;
 563                                 process_interval();
 564                                 if (interval_count && !(--times))
 565                                         break;
 566                         }
 567                 }
 568                 if (child_pid != -1)
 569                         wait4(child_pid, &status, 0, &stat_config.ru_data);
 570
 571                 if (workload_exec_errno) {
 572                         const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
 573                         pr_err("Workload failed: %s\n", emsg);
 574                         return -1;
 575                 }
 576
 577                 if (WIFSIGNALED(status))
 578                         psignal(WTERMSIG(status), argv[0]);
 579         } else {
 580                 enable_counters();
 581                 while (!done) {
 582                         nanosleep(&ts, NULL);
 583                         if (!is_target_alive(&target, evsel_list->threads))
 584                                 break;
 585                         if (timeout)
 586                                 break;
 587                         if (interval) {
 588                                 process_interval();
 589                                 if (interval_count && !(--times))
 590                                         break;
 591                         }
 592                 }
 593         }
 594
 595         disable_counters();
 596
 597         t1 = rdclock();
 598
 599         if (stat_config.walltime_run_table)
 600                 stat_config.walltime_run[run_idx] = t1 - t0;
 601
 602         update_stats(&walltime_nsecs_stats, t1 - t0);
 603
 604         /*
 605          * Closing a group leader splits the group, and as we only disable
 606          * group leaders, results in remaining events becoming enabled. To
 607          * avoid arbitrary skew, we must read all counters before closing any
 608          * group leaders.
 609          */
 610         read_counters(&(struct timespec) { .tv_nsec = t1-t0 });
 611         perf_evlist__close(evsel_list);
 612
 613         return WEXITSTATUS(status);
 614 }
 615
 616 static int run_perf_stat(int argc, const char **argv, int run_idx)
 617 {
 618         int ret;
 619
 620         if (pre_cmd) {
 621                 ret = system(pre_cmd);
 622                 if (ret)
 623                         return ret;
 624         }
 625
 626         if (sync_run)
 627                 sync();
 628
 629         ret = __run_perf_stat(argc, argv, run_idx);
 630         if (ret)
 631                 return ret;
 632
 633         if (post_cmd) {
 634                 ret = system(post_cmd);
 635                 if (ret)
 636                         return ret;
 637         }
 638
 639         return ret;
 640 }
 641
 642 static void print_counters(struct timespec *ts, int argc, const char **argv)
 643 {
 644         /* Do not print anything if we record to the pipe. */
 645         if (STAT_RECORD && perf_stat.data.is_pipe)
 646                 return;
 647
 648         perf_evlist__print_counters(evsel_list, &stat_config, &target,
 649                                     ts, argc, argv);
 650 }
 651
 652 static volatile int signr = -1;
 653
 654 static void skip_signal(int signo)
 655 {
 656         if ((child_pid == -1) || stat_config.interval)
 657                 done = 1;
 658
 659         signr = signo;
 660         /*
 661          * render child_pid harmless
 662          * won't send SIGTERM to a random
 663          * process in case of race condition
 664          * and fast PID recycling
 665          */
 666         child_pid = -1;
 667 }
 668
 669 static void sig_atexit(void)
 670 {
 671         sigset_t set, oset;
 672
 673         /*
 674          * avoid race condition with SIGCHLD handler
 675          * in skip_signal() which is modifying child_pid
 676          * goal is to avoid send SIGTERM to a random
 677          * process
 678          */
 679         sigemptyset(&set);
 680         sigaddset(&set, SIGCHLD);
 681         sigprocmask(SIG_BLOCK, &set, &oset);
 682
 683         if (child_pid != -1)
 684                 kill(child_pid, SIGTERM);
 685
 686         sigprocmask(SIG_SETMASK, &oset, NULL);
 687
 688         if (signr == -1)
 689                 return;
 690
 691         signal(signr, SIG_DFL);
 692         kill(getpid(), signr);
 693 }
 694
 695 static int stat__set_big_num(const struct option *opt __maybe_unused,
 696                              const char *s __maybe_unused, int unset)
 697 {
 698         big_num_opt = unset ? 0 : 1;
 699         return 0;
 700 }
 701
 702 static int enable_metric_only(const struct option *opt __maybe_unused,
 703                               const char *s __maybe_unused, int unset)
 704 {
 705         force_metric_only = true;
 706         stat_config.metric_only = !unset;
 707         return 0;
 708 }
 709
 710 static int parse_metric_groups(const struct option *opt,
 711                                const char *str,
 712                                int unset __maybe_unused)
 713 {
 714         return metricgroup__parse_groups(opt, str, &stat_config.metric_events);
 715 }
 716
 717 static struct option stat_options[] = {
 718         OPT_BOOLEAN('T', "transaction", &transaction_run,
 719                     "hardware transaction statistics"),
 720         OPT_CALLBACK('e', "event", &evsel_list, "event",
 721                      "event selector. use 'perf list' to list available events",
 722                      parse_events_option),
 723         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
 724                      "event filter", parse_filter),
 725         OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit,
 726                     "child tasks do not inherit counters"),
 727         OPT_STRING('p', "pid", &target.pid, "pid",
 728                    "stat events on existing process id"),
 729         OPT_STRING('t', "tid", &target.tid, "tid",
 730                    "stat events on existing thread id"),
 731         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
 732                     "system-wide collection from all CPUs"),
 733         OPT_BOOLEAN('g', "group", &group,
 734                     "put the counters into a counter group"),
 735         OPT_BOOLEAN(0, "scale", &stat_config.scale,
 736                     "Use --no-scale to disable counter scaling for multiplexing"),
 737         OPT_INCR('v', "verbose", &verbose,
 738                     "be more verbose (show counter open errors, etc)"),
 739         OPT_INTEGER('r', "repeat", &stat_config.run_count,
 740                     "repeat command and print average + stddev (max: 100, forever: 0)"),
 741         OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table,
 742                     "display details about each run (only with -r option)"),
 743         OPT_BOOLEAN('n', "null", &stat_config.null_run,
 744                     "null run - dont start any counters"),
 745         OPT_INCR('d', "detailed", &detailed_run,
 746                     "detailed run - start a lot of events"),
 747         OPT_BOOLEAN('S', "sync", &sync_run,
 748                     "call sync() before starting a run"),
 749         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
 750                            "print large numbers with thousands\' separators",
 751                            stat__set_big_num),
 752         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
 753                     "list of cpus to monitor in system-wide"),
 754         OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode,
 755                     "disable CPU count aggregation", AGGR_NONE),
 756         OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"),
 757         OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator",
 758                    "print counts with custom separator"),
 759         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
 760                      "monitor event in cgroup name only", parse_cgroups),
 761         OPT_STRING('o', "output", &output_name, "file", "output file name"),
 762         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
 763         OPT_INTEGER(0, "log-fd", &output_fd,
 764                     "log output to fd, instead of stderr"),
 765         OPT_STRING(0, "pre", &pre_cmd, "command",
 766                         "command to run prior to the measured command"),
 767         OPT_STRING(0, "post", &post_cmd, "command",
 768                         "command to run after to the measured command"),
 769         OPT_UINTEGER('I', "interval-print", &stat_config.interval,
 770                     "print counts at regular interval in ms "
 771                     "(overhead is possible for values <= 100ms)"),
 772         OPT_INTEGER(0, "interval-count", &stat_config.times,
 773                     "print counts for fixed number of times"),
 774         OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear,
 775                     "clear screen in between new interval"),
 776         OPT_UINTEGER(0, "timeout", &stat_config.timeout,
 777                     "stop workload and print counts after a timeout period in ms (>= 10ms)"),
 778         OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode,
 779                      "aggregate counts per processor socket", AGGR_SOCKET),
 780         OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode,
 781                      "aggregate counts per physical processor core", AGGR_CORE),
 782         OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode,
 783                      "aggregate counts per thread", AGGR_THREAD),
 784         OPT_UINTEGER('D', "delay", &stat_config.initial_delay,
 785                      "ms to wait before starting measurement after program start"),
 786         OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL,
 787                         "Only print computed metrics. No raw values", enable_metric_only),
 788         OPT_BOOLEAN(0, "topdown", &topdown_run,
 789                         "measure topdown level 1 statistics"),
 790         OPT_BOOLEAN(0, "smi-cost", &smi_cost,
 791                         "measure SMI cost"),
 792         OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list",
 793                      "monitor specified metrics or metric groups (separated by ,)",
 794                      parse_metric_groups),
 795         OPT_END()
 796 };
 797
 798 static int perf_stat__get_socket(struct perf_stat_config *config __maybe_unused,
 799                                  struct cpu_map *map, int cpu)
 800 {
 801         return cpu_map__get_socket(map, cpu, NULL);
 802 }
 803
 804 static int perf_stat__get_core(struct perf_stat_config *config __maybe_unused,
 805                                struct cpu_map *map, int cpu)
 806 {
 807         return cpu_map__get_core(map, cpu, NULL);
 808 }
 809
 810 static int cpu_map__get_max(struct cpu_map *map)
 811 {
 812         int i, max = -1;
 813
 814         for (i = 0; i < map->nr; i++) {
 815                 if (map->map[i] > max)
 816                         max = map->map[i];
 817         }
 818
 819         return max;
 820 }
 821
 822 static int perf_stat__get_aggr(struct perf_stat_config *config,
 823                                aggr_get_id_t get_id, struct cpu_map *map, int idx)
 824 {
 825         int cpu;
 826
 827         if (idx >= map->nr)
 828                 return -1;
 829
 830         cpu = map->map[idx];
 831
 832         if (config->cpus_aggr_map->map[cpu] == -1)
 833                 config->cpus_aggr_map->map[cpu] = get_id(config, map, idx);
 834
 835         return config->cpus_aggr_map->map[cpu];
 836 }
 837
 838 static int perf_stat__get_socket_cached(struct perf_stat_config *config,
 839                                         struct cpu_map *map, int idx)
 840 {
 841         return perf_stat__get_aggr(config, perf_stat__get_socket, map, idx);
 842 }
 843
 844 static int perf_stat__get_core_cached(struct perf_stat_config *config,
 845                                       struct cpu_map *map, int idx)
 846 {
 847         return perf_stat__get_aggr(config, perf_stat__get_core, map, idx);
 848 }
 849
 850 static int perf_stat_init_aggr_mode(void)
 851 {
 852         int nr;
 853
 854         switch (stat_config.aggr_mode) {
 855         case AGGR_SOCKET:
 856                 if (cpu_map__build_socket_map(evsel_list->cpus, &stat_config.aggr_map)) {
 857                         perror("cannot build socket map");
 858                         return -1;
 859                 }
 860                 stat_config.aggr_get_id = perf_stat__get_socket_cached;
 861                 break;
 862         case AGGR_CORE:
 863                 if (cpu_map__build_core_map(evsel_list->cpus, &stat_config.aggr_map)) {
 864                         perror("cannot build core map");
 865                         return -1;
 866                 }
 867                 stat_config.aggr_get_id = perf_stat__get_core_cached;
 868                 break;
 869         case AGGR_NONE:
 870         case AGGR_GLOBAL:
 871         case AGGR_THREAD:
 872         case AGGR_UNSET:
 873         default:
 874                 break;
 875         }
 876
 877         /*
 878          * The evsel_list->cpus is the base we operate on,
 879          * taking the highest cpu number to be the size of
 880          * the aggregation translate cpumap.
 881          */
 882         nr = cpu_map__get_max(evsel_list->cpus);
 883         stat_config.cpus_aggr_map = cpu_map__empty_new(nr + 1);
 884         return stat_config.cpus_aggr_map ? 0 : -ENOMEM;
 885 }
 886
 887 static void perf_stat__exit_aggr_mode(void)
 888 {
 889         cpu_map__put(stat_config.aggr_map);
 890         cpu_map__put(stat_config.cpus_aggr_map);
 891         stat_config.aggr_map = NULL;
 892         stat_config.cpus_aggr_map = NULL;
 893 }
 894
 895 static inline int perf_env__get_cpu(struct perf_env *env, struct cpu_map *map, int idx)
 896 {
 897         int cpu;
 898
 899         if (idx > map->nr)
 900                 return -1;
 901
 902         cpu = map->map[idx];
 903
 904         if (cpu >= env->nr_cpus_avail)
 905                 return -1;
 906
 907         return cpu;
 908 }
 909
 910 static int perf_env__get_socket(struct cpu_map *map, int idx, void *data)
 911 {
 912         struct perf_env *env = data;
 913         int cpu = perf_env__get_cpu(env, map, idx);
 914
 915         return cpu == -1 ? -1 : env->cpu[cpu].socket_id;
 916 }
 917
 918 static int perf_env__get_core(struct cpu_map *map, int idx, void *data)
 919 {
 920         struct perf_env *env = data;
 921         int core = -1, cpu = perf_env__get_cpu(env, map, idx);
 922
 923         if (cpu != -1) {
 924                 int socket_id = env->cpu[cpu].socket_id;
 925
 926                 /*
 927                  * Encode socket in upper 16 bits
 928                  * core_id is relative to socket, and
 929                  * we need a global id. So we combine
 930                  * socket + core id.
 931                  */
 932                 core = (socket_id << 16) | (env->cpu[cpu].core_id & 0xffff);
 933         }
 934
 935         return core;
 936 }
 937
 938 static int perf_env__build_socket_map(struct perf_env *env, struct cpu_map *cpus,
 939                                       struct cpu_map **sockp)
 940 {
 941         return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env);
 942 }
 943
 944 static int perf_env__build_core_map(struct perf_env *env, struct cpu_map *cpus,
 945                                     struct cpu_map **corep)
 946 {
 947         return cpu_map__build_map(cpus, corep, perf_env__get_core, env);
 948 }
 949
 950 static int perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused,
 951                                       struct cpu_map *map, int idx)
 952 {
 953         return perf_env__get_socket(map, idx, &perf_stat.session->header.env);
 954 }
 955
 956 static int perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused,
 957                                     struct cpu_map *map, int idx)
 958 {
 959         return perf_env__get_core(map, idx, &perf_stat.session->header.env);
 960 }
 961
 962 static int perf_stat_init_aggr_mode_file(struct perf_stat *st)
 963 {
 964         struct perf_env *env = &st->session->header.env;
 965
 966         switch (stat_config.aggr_mode) {
 967         case AGGR_SOCKET:
 968                 if (perf_env__build_socket_map(env, evsel_list->cpus, &stat_config.aggr_map)) {
 969                         perror("cannot build socket map");
 970                         return -1;
 971                 }
 972                 stat_config.aggr_get_id = perf_stat__get_socket_file;
 973                 break;
 974         case AGGR_CORE:
 975                 if (perf_env__build_core_map(env, evsel_list->cpus, &stat_config.aggr_map)) {
 976                         perror("cannot build core map");
 977                         return -1;
 978                 }
 979                 stat_config.aggr_get_id = perf_stat__get_core_file;
 980                 break;
 981         case AGGR_NONE:
 982         case AGGR_GLOBAL:
 983         case AGGR_THREAD:
 984         case AGGR_UNSET:
 985         default:
 986                 break;
 987         }
 988
 989         return 0;
 990 }
 991
 992 static int topdown_filter_events(const char **attr, char **str, bool use_group)
 993 {
 994         int off = 0;
 995         int i;
 996         int len = 0;
 997         char *s;
 998
 999         for (i = 0; attr[i]; i++) {
1000                 if (pmu_have_event("cpu", attr[i])) {
1001                         len += strlen(attr[i]) + 1;
1002                         attr[i - off] = attr[i];
1003                 } else
1004                         off++;
1005         }
1006         attr[i - off] = NULL;
1007
1008         *str = malloc(len + 1 + 2);
1009         if (!*str)
1010                 return -1;
1011         s = *str;
1012         if (i - off == 0) {
1013                 *s = 0;
1014                 return 0;
1015         }
1016         if (use_group)
1017                 *s++ = '{';
1018         for (i = 0; attr[i]; i++) {
1019                 strcpy(s, attr[i]);
1020                 s += strlen(s);
1021                 *s++ = ',';
1022         }
1023         if (use_group) {
1024                 s[-1] = '}';
1025                 *s = 0;
1026         } else
1027                 s[-1] = 0;
1028         return 0;
1029 }
1030
1031 __weak bool arch_topdown_check_group(bool *warn)
1032 {
1033         *warn = false;
1034         return false;
1035 }
1036
1037 __weak void arch_topdown_group_warn(void)
1038 {
1039 }
1040
1041 /*
1042  * Add default attributes, if there were no attributes specified or
1043  * if -d/--detailed, -d -d or -d -d -d is used:
1044  */
1045 static int add_default_attributes(void)
1046 {
1047         int err;
1048         struct perf_event_attr default_attrs0[] = {
1049
1050   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
1051   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
1052   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
1053   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
1054
1055   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
1056 };
1057         struct perf_event_attr frontend_attrs[] = {
1058   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1059 };
1060         struct perf_event_attr backend_attrs[] = {
1061   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
1062 };
1063         struct perf_event_attr default_attrs1[] = {
1064   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
1065   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
1066   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
1067
1068 };
1069
1070 /*
1071  * Detailed stats (-d), covering the L1 and last level data caches:
1072  */
1073         struct perf_event_attr detailed_attrs[] = {
1074
1075   { .type = PERF_TYPE_HW_CACHE,
1076     .config =
1077          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1078         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1079         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1080
1081   { .type = PERF_TYPE_HW_CACHE,
1082     .config =
1083          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1084         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1085         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1086
1087   { .type = PERF_TYPE_HW_CACHE,
1088     .config =
1089          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1090         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1091         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1092
1093   { .type = PERF_TYPE_HW_CACHE,
1094     .config =
1095          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1096         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1097         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1098 };
1099
1100 /*
1101  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1102  */
1103         struct perf_event_attr very_detailed_attrs[] = {
1104
1105   { .type = PERF_TYPE_HW_CACHE,
1106     .config =
1107          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1108         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1109         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1110
1111   { .type = PERF_TYPE_HW_CACHE,
1112     .config =
1113          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1114         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1115         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1116
1117   { .type = PERF_TYPE_HW_CACHE,
1118     .config =
1119          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1120         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1121         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1122
1123   { .type = PERF_TYPE_HW_CACHE,
1124     .config =
1125          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1126         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1127         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1128
1129   { .type = PERF_TYPE_HW_CACHE,
1130     .config =
1131          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1132         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1133         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1134
1135   { .type = PERF_TYPE_HW_CACHE,
1136     .config =
1137          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1138         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1139         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1140
1141 };
1142
1143 /*
1144  * Very, very detailed stats (-d -d -d), adding prefetch events:
1145  */
1146         struct perf_event_attr very_very_detailed_attrs[] = {
1147
1148   { .type = PERF_TYPE_HW_CACHE,
1149     .config =
1150          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1151         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1152         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1153
1154   { .type = PERF_TYPE_HW_CACHE,
1155     .config =
1156          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1157         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1158         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1159 };
1160         struct parse_events_error errinfo;
1161
1162         /* Set attrs if no event is selected and !null_run: */
1163         if (stat_config.null_run)
1164                 return 0;
1165
1166         if (transaction_run) {
1167                 /* Handle -T as -M transaction. Once platform specific metrics
1168                  * support has been added to the json files, all archictures
1169                  * will use this approach. To determine transaction support
1170                  * on an architecture test for such a metric name.
1171                  */
1172                 if (metricgroup__has_metric("transaction")) {
1173                         struct option opt = { .value = &evsel_list };
1174
1175                         return metricgroup__parse_groups(&opt, "transaction",
1176                                                          &stat_config.metric_events);
1177                 }
1178
1179                 if (pmu_have_event("cpu", "cycles-ct") &&
1180                     pmu_have_event("cpu", "el-start"))
1181                         err = parse_events(evsel_list, transaction_attrs,
1182                                            &errinfo);
1183                 else
1184                         err = parse_events(evsel_list,
1185                                            transaction_limited_attrs,
1186                                            &errinfo);
1187                 if (err) {
1188                         fprintf(stderr, "Cannot set up transaction events\n");
1189                         parse_events_print_error(&errinfo, transaction_attrs);
1190                         return -1;
1191                 }
1192                 return 0;
1193         }
1194
1195         if (smi_cost) {
1196                 int smi;
1197
1198                 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) {
1199                         fprintf(stderr, "freeze_on_smi is not supported.\n");
1200                         return -1;
1201                 }
1202
1203                 if (!smi) {
1204                         if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) {
1205                                 fprintf(stderr, "Failed to set freeze_on_smi.\n");
1206                                 return -1;
1207                         }
1208                         smi_reset = true;
1209                 }
1210
1211                 if (pmu_have_event("msr", "aperf") &&
1212                     pmu_have_event("msr", "smi")) {
1213                         if (!force_metric_only)
1214                                 stat_config.metric_only = true;
1215                         err = parse_events(evsel_list, smi_cost_attrs, &errinfo);
1216                 } else {
1217                         fprintf(stderr, "To measure SMI cost, it needs "
1218                                 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n");
1219                         parse_events_print_error(&errinfo, smi_cost_attrs);
1220                         return -1;
1221                 }
1222                 if (err) {
1223                         fprintf(stderr, "Cannot set up SMI cost events\n");
1224                         return -1;
1225                 }
1226                 return 0;
1227         }
1228
1229         if (topdown_run) {
1230                 char *str = NULL;
1231                 bool warn = false;
1232
1233                 if (stat_config.aggr_mode != AGGR_GLOBAL &&
1234                     stat_config.aggr_mode != AGGR_CORE) {
1235                         pr_err("top down event configuration requires --per-core mode\n");
1236                         return -1;
1237                 }
1238                 stat_config.aggr_mode = AGGR_CORE;
1239                 if (nr_cgroups || !target__has_cpu(&target)) {
1240                         pr_err("top down event configuration requires system-wide mode (-a)\n");
1241                         return -1;
1242                 }
1243
1244                 if (!force_metric_only)
1245                         stat_config.metric_only = true;
1246                 if (topdown_filter_events(topdown_attrs, &str,
1247                                 arch_topdown_check_group(&warn)) < 0) {
1248                         pr_err("Out of memory\n");
1249                         return -1;
1250                 }
1251                 if (topdown_attrs[0] && str) {
1252                         if (warn)
1253                                 arch_topdown_group_warn();
1254                         err = parse_events(evsel_list, str, &errinfo);
1255                         if (err) {
1256                                 fprintf(stderr,
1257                                         "Cannot set up top down events %s: %d\n",
1258                                         str, err);
1259                                 free(str);
1260                                 parse_events_print_error(&errinfo, str);
1261                                 return -1;
1262                         }
1263                 } else {
1264                         fprintf(stderr, "System does not support topdown\n");
1265                         return -1;
1266                 }
1267                 free(str);
1268         }
1269
1270         if (!evsel_list->nr_entries) {
1271                 if (target__has_cpu(&target))
1272                         default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK;
1273
1274                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs0) < 0)
1275                         return -1;
1276                 if (pmu_have_event("cpu", "stalled-cycles-frontend")) {
1277                         if (perf_evlist__add_default_attrs(evsel_list,
1278                                                 frontend_attrs) < 0)
1279                                 return -1;
1280                 }
1281                 if (pmu_have_event("cpu", "stalled-cycles-backend")) {
1282                         if (perf_evlist__add_default_attrs(evsel_list,
1283                                                 backend_attrs) < 0)
1284                                 return -1;
1285                 }
1286                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs1) < 0)
1287                         return -1;
1288         }
1289
1290         /* Detailed events get appended to the event list: */
1291
1292         if (detailed_run <  1)
1293                 return 0;
1294
1295         /* Append detailed run extra attributes: */
1296         if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1297                 return -1;
1298
1299         if (detailed_run < 2)
1300                 return 0;
1301
1302         /* Append very detailed run extra attributes: */
1303         if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1304                 return -1;
1305
1306         if (detailed_run < 3)
1307                 return 0;
1308
1309         /* Append very, very detailed run extra attributes: */
1310         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1311 }
1312
1313 static const char * const stat_record_usage[] = {
1314         "perf stat record [<options>]",
1315         NULL,
1316 };
1317
1318 static void init_features(struct perf_session *session)
1319 {
1320         int feat;
1321
1322         for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
1323                 perf_header__set_feat(&session->header, feat);
1324
1325         perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT);
1326         perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
1327         perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
1328         perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
1329         perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
1330 }
1331
1332 static int __cmd_record(int argc, const char **argv)
1333 {
1334         struct perf_session *session;
1335         struct perf_data *data = &perf_stat.data;
1336
1337         argc = parse_options(argc, argv, stat_options, stat_record_usage,
1338                              PARSE_OPT_STOP_AT_NON_OPTION);
1339
1340         if (output_name)
1341                 data->path = output_name;
1342
1343         if (stat_config.run_count != 1 || forever) {
1344                 pr_err("Cannot use -r option with perf stat record.\n");
1345                 return -1;
1346         }
1347
1348         session = perf_session__new(data, false, NULL);
1349         if (session == NULL) {
1350                 pr_err("Perf session creation failed.\n");
1351                 return -1;
1352         }
1353
1354         init_features(session);
1355
1356         session->evlist   = evsel_list;
1357         perf_stat.session = session;
1358         perf_stat.record  = true;
1359         return argc;
1360 }
1361
1362 static int process_stat_round_event(struct perf_session *session,
1363                                     union perf_event *event)
1364 {
1365         struct stat_round_event *stat_round = &event->stat_round;
1366         struct perf_evsel *counter;
1367         struct timespec tsh, *ts = NULL;
1368         const char **argv = session->header.env.cmdline_argv;
1369         int argc = session->header.env.nr_cmdline;
1370
1371         evlist__for_each_entry(evsel_list, counter)
1372                 perf_stat_process_counter(&stat_config, counter);
1373
1374         if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL)
1375                 update_stats(&walltime_nsecs_stats, stat_round->time);
1376
1377         if (stat_config.interval && stat_round->time) {
1378                 tsh.tv_sec  = stat_round->time / NSEC_PER_SEC;
1379                 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC;
1380                 ts = &tsh;
1381         }
1382
1383         print_counters(ts, argc, argv);
1384         return 0;
1385 }
1386
1387 static
1388 int process_stat_config_event(struct perf_session *session,
1389                               union perf_event *event)
1390 {
1391         struct perf_tool *tool = session->tool;
1392         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1393
1394         perf_event__read_stat_config(&stat_config, &event->stat_config);
1395
1396         if (cpu_map__empty(st->cpus)) {
1397                 if (st->aggr_mode != AGGR_UNSET)
1398                         pr_warning("warning: processing task data, aggregation mode not set\n");
1399                 return 0;
1400         }
1401
1402         if (st->aggr_mode != AGGR_UNSET)
1403                 stat_config.aggr_mode = st->aggr_mode;
1404
1405         if (perf_stat.data.is_pipe)
1406                 perf_stat_init_aggr_mode();
1407         else
1408                 perf_stat_init_aggr_mode_file(st);
1409
1410         return 0;
1411 }
1412
1413 static int set_maps(struct perf_stat *st)
1414 {
1415         if (!st->cpus || !st->threads)
1416                 return 0;
1417
1418         if (WARN_ONCE(st->maps_allocated, "stats double allocation\n"))
1419                 return -EINVAL;
1420
1421         perf_evlist__set_maps(evsel_list, st->cpus, st->threads);
1422
1423         if (perf_evlist__alloc_stats(evsel_list, true))
1424                 return -ENOMEM;
1425
1426         st->maps_allocated = true;
1427         return 0;
1428 }
1429
1430 static
1431 int process_thread_map_event(struct perf_session *session,
1432                              union perf_event *event)
1433 {
1434         struct perf_tool *tool = session->tool;
1435         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1436
1437         if (st->threads) {
1438                 pr_warning("Extra thread map event, ignoring.\n");
1439                 return 0;
1440         }
1441
1442         st->threads = thread_map__new_event(&event->thread_map);
1443         if (!st->threads)
1444                 return -ENOMEM;
1445
1446         return set_maps(st);
1447 }
1448
1449 static
1450 int process_cpu_map_event(struct perf_session *session,
1451                           union perf_event *event)
1452 {
1453         struct perf_tool *tool = session->tool;
1454         struct perf_stat *st = container_of(tool, struct perf_stat, tool);
1455         struct cpu_map *cpus;
1456
1457         if (st->cpus) {
1458                 pr_warning("Extra cpu map event, ignoring.\n");
1459                 return 0;
1460         }
1461
1462         cpus = cpu_map__new_data(&event->cpu_map.data);
1463         if (!cpus)
1464                 return -ENOMEM;
1465
1466         st->cpus = cpus;
1467         return set_maps(st);
1468 }
1469
1470 static int runtime_stat_new(struct perf_stat_config *config, int nthreads)
1471 {
1472         int i;
1473
1474         config->stats = calloc(nthreads, sizeof(struct runtime_stat));
1475         if (!config->stats)
1476                 return -1;
1477
1478         config->stats_num = nthreads;
1479
1480         for (i = 0; i < nthreads; i++)
1481                 runtime_stat__init(&config->stats[i]);
1482
1483         return 0;
1484 }
1485
1486 static void runtime_stat_delete(struct perf_stat_config *config)
1487 {
1488         int i;
1489
1490         if (!config->stats)
1491                 return;
1492
1493         for (i = 0; i < config->stats_num; i++)
1494                 runtime_stat__exit(&config->stats[i]);
1495
1496         free(config->stats);
1497 }
1498
1499 static const char * const stat_report_usage[] = {
1500         "perf stat report [<options>]",
1501         NULL,
1502 };
1503
1504 static struct perf_stat perf_stat = {
1505         .tool = {
1506                 .attr           = perf_event__process_attr,
1507                 .event_update   = perf_event__process_event_update,
1508                 .thread_map     = process_thread_map_event,
1509                 .cpu_map        = process_cpu_map_event,
1510                 .stat_config    = process_stat_config_event,
1511                 .stat           = perf_event__process_stat_event,
1512                 .stat_round     = process_stat_round_event,
1513         },
1514         .aggr_mode = AGGR_UNSET,
1515 };
1516
1517 static int __cmd_report(int argc, const char **argv)
1518 {
1519         struct perf_session *session;
1520         const struct option options[] = {
1521         OPT_STRING('i', "input", &input_name, "file", "input file name"),
1522         OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode,
1523                      "aggregate counts per processor socket", AGGR_SOCKET),
1524         OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode,
1525                      "aggregate counts per physical processor core", AGGR_CORE),
1526         OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode,
1527                      "disable CPU count aggregation", AGGR_NONE),
1528         OPT_END()
1529         };
1530         struct stat st;
1531         int ret;
1532
1533         argc = parse_options(argc, argv, options, stat_report_usage, 0);
1534
1535         if (!input_name || !strlen(input_name)) {
1536                 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode))
1537                         input_name = "-";
1538                 else
1539                         input_name = "perf.data";
1540         }
1541
1542         perf_stat.data.path = input_name;
1543         perf_stat.data.mode = PERF_DATA_MODE_READ;
1544
1545         session = perf_session__new(&perf_stat.data, false, &perf_stat.tool);
1546         if (session == NULL)
1547                 return -1;
1548
1549         perf_stat.session  = session;
1550         stat_config.output = stderr;
1551         evsel_list         = session->evlist;
1552
1553         ret = perf_session__process_events(session);
1554         if (ret)
1555                 return ret;
1556
1557         perf_session__delete(session);
1558         return 0;
1559 }
1560
1561 static void setup_system_wide(int forks)
1562 {
1563         /*
1564          * Make system wide (-a) the default target if
1565          * no target was specified and one of following
1566          * conditions is met:
1567          *
1568          *   - there's no workload specified
1569          *   - there is workload specified but all requested
1570          *     events are system wide events
1571          */
1572         if (!target__none(&target))
1573                 return;
1574
1575         if (!forks)
1576                 target.system_wide = true;
1577         else {
1578                 struct perf_evsel *counter;
1579
1580                 evlist__for_each_entry(evsel_list, counter) {
1581                         if (!counter->system_wide)
1582                                 return;
1583                 }
1584
1585                 if (evsel_list->nr_entries)
1586                         target.system_wide = true;
1587         }
1588 }
1589
1590 int cmd_stat(int argc, const char **argv)
1591 {
1592         const char * const stat_usage[] = {
1593                 "perf stat [<options>] [<command>]",
1594                 NULL
1595         };
1596         int status = -EINVAL, run_idx;
1597         const char *mode;
1598         FILE *output = stderr;
1599         unsigned int interval, timeout;
1600         const char * const stat_subcommands[] = { "record", "report" };
1601
1602         setlocale(LC_ALL, "");
1603
1604         evsel_list = perf_evlist__new();
1605         if (evsel_list == NULL)
1606                 return -ENOMEM;
1607
1608         parse_events__shrink_config_terms();
1609
1610         /* String-parsing callback-based options would segfault when negated */
1611         set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG);
1612         set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG);
1613         set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG);
1614
1615         argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands,
1616                                         (const char **) stat_usage,
1617                                         PARSE_OPT_STOP_AT_NON_OPTION);
1618         perf_stat__collect_metric_expr(evsel_list);
1619         perf_stat__init_shadow_stats();
1620
1621         if (stat_config.csv_sep) {
1622                 stat_config.csv_output = true;
1623                 if (!strcmp(stat_config.csv_sep, "\\t"))
1624                         stat_config.csv_sep = "\t";
1625         } else
1626                 stat_config.csv_sep = DEFAULT_SEPARATOR;
1627
1628         if (argc && !strncmp(argv[0], "rec", 3)) {
1629                 argc = __cmd_record(argc, argv);
1630                 if (argc < 0)
1631                         return -1;
1632         } else if (argc && !strncmp(argv[0], "rep", 3))
1633                 return __cmd_report(argc, argv);
1634
1635         interval = stat_config.interval;
1636         timeout = stat_config.timeout;
1637
1638         /*
1639          * For record command the -o is already taken care of.
1640          */
1641         if (!STAT_RECORD && output_name && strcmp(output_name, "-"))
1642                 output = NULL;
1643
1644         if (output_name && output_fd) {
1645                 fprintf(stderr, "cannot use both --output and --log-fd\n");
1646                 parse_options_usage(stat_usage, stat_options, "o", 1);
1647                 parse_options_usage(NULL, stat_options, "log-fd", 0);
1648                 goto out;
1649         }
1650
1651         if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) {
1652                 fprintf(stderr, "--metric-only is not supported with --per-thread\n");
1653                 goto out;
1654         }
1655
1656         if (stat_config.metric_only && stat_config.run_count > 1) {
1657                 fprintf(stderr, "--metric-only is not supported with -r\n");
1658                 goto out;
1659         }
1660
1661         if (stat_config.walltime_run_table && stat_config.run_count <= 1) {
1662                 fprintf(stderr, "--table is only supported with -r\n");
1663                 parse_options_usage(stat_usage, stat_options, "r", 1);
1664                 parse_options_usage(NULL, stat_options, "table", 0);
1665                 goto out;
1666         }
1667
1668         if (output_fd < 0) {
1669                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1670                 parse_options_usage(stat_usage, stat_options, "log-fd", 0);
1671                 goto out;
1672         }
1673
1674         if (!output) {
1675                 struct timespec tm;
1676                 mode = append_file ? "a" : "w";
1677
1678                 output = fopen(output_name, mode);
1679                 if (!output) {
1680                         perror("failed to create output file");
1681                         return -1;
1682                 }
1683                 clock_gettime(CLOCK_REALTIME, &tm);
1684                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1685         } else if (output_fd > 0) {
1686                 mode = append_file ? "a" : "w";
1687                 output = fdopen(output_fd, mode);
1688                 if (!output) {
1689                         perror("Failed opening logfd");
1690                         return -errno;
1691                 }
1692         }
1693
1694         stat_config.output = output;
1695
1696         /*
1697          * let the spreadsheet do the pretty-printing
1698          */
1699         if (stat_config.csv_output) {
1700                 /* User explicitly passed -B? */
1701                 if (big_num_opt == 1) {
1702                         fprintf(stderr, "-B option not supported with -x\n");
1703                         parse_options_usage(stat_usage, stat_options, "B", 1);
1704                         parse_options_usage(NULL, stat_options, "x", 1);
1705                         goto out;
1706                 } else /* Nope, so disable big number formatting */
1707                         stat_config.big_num = false;
1708         } else if (big_num_opt == 0) /* User passed --no-big-num */
1709                 stat_config.big_num = false;
1710
1711         setup_system_wide(argc);
1712
1713         /*
1714          * Display user/system times only for single
1715          * run and when there's specified tracee.
1716          */
1717         if ((stat_config.run_count == 1) && target__none(&target))
1718                 stat_config.ru_display = true;
1719
1720         if (stat_config.run_count < 0) {
1721                 pr_err("Run count must be a positive number\n");
1722                 parse_options_usage(stat_usage, stat_options, "r", 1);
1723                 goto out;
1724         } else if (stat_config.run_count == 0) {
1725                 forever = true;
1726                 stat_config.run_count = 1;
1727         }
1728
1729         if (stat_config.walltime_run_table) {
1730                 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0]));
1731                 if (!stat_config.walltime_run) {
1732                         pr_err("failed to setup -r option");
1733                         goto out;
1734                 }
1735         }
1736
1737         if ((stat_config.aggr_mode == AGGR_THREAD) &&
1738                 !target__has_task(&target)) {
1739                 if (!target.system_wide || target.cpu_list) {
1740                         fprintf(stderr, "The --per-thread option is only "
1741                                 "available when monitoring via -p -t -a "
1742                                 "options or only --per-thread.\n");
1743                         parse_options_usage(NULL, stat_options, "p", 1);
1744                         parse_options_usage(NULL, stat_options, "t", 1);
1745                         goto out;
1746                 }
1747         }
1748
1749         /*
1750          * no_aggr, cgroup are for system-wide only
1751          * --per-thread is aggregated per thread, we dont mix it with cpu mode
1752          */
1753         if (((stat_config.aggr_mode != AGGR_GLOBAL &&
1754               stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) &&
1755             !target__has_cpu(&target)) {
1756                 fprintf(stderr, "both cgroup and no-aggregation "
1757                         "modes only available in system-wide mode\n");
1758
1759                 parse_options_usage(stat_usage, stat_options, "G", 1);
1760                 parse_options_usage(NULL, stat_options, "A", 1);
1761                 parse_options_usage(NULL, stat_options, "a", 1);
1762                 goto out;
1763         }
1764
1765         if (add_default_attributes())
1766                 goto out;
1767
1768         target__validate(&target);
1769
1770         if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide))
1771                 target.per_thread = true;
1772
1773         if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1774                 if (target__has_task(&target)) {
1775                         pr_err("Problems finding threads of monitor\n");
1776                         parse_options_usage(stat_usage, stat_options, "p", 1);
1777                         parse_options_usage(NULL, stat_options, "t", 1);
1778                 } else if (target__has_cpu(&target)) {
1779                         perror("failed to parse CPUs map");
1780                         parse_options_usage(stat_usage, stat_options, "C", 1);
1781                         parse_options_usage(NULL, stat_options, "a", 1);
1782                 }
1783                 goto out;
1784         }
1785
1786         /*
1787          * Initialize thread_map with comm names,
1788          * so we could print it out on output.
1789          */
1790         if (stat_config.aggr_mode == AGGR_THREAD) {
1791                 thread_map__read_comms(evsel_list->threads);
1792                 if (target.system_wide) {
1793                         if (runtime_stat_new(&stat_config,
1794                                 thread_map__nr(evsel_list->threads))) {
1795                                 goto out;
1796                         }
1797                 }
1798         }
1799
1800         if (stat_config.times && interval)
1801                 interval_count = true;
1802         else if (stat_config.times && !interval) {
1803                 pr_err("interval-count option should be used together with "
1804                                 "interval-print.\n");
1805                 parse_options_usage(stat_usage, stat_options, "interval-count", 0);
1806                 parse_options_usage(stat_usage, stat_options, "I", 1);
1807                 goto out;
1808         }
1809
1810         if (timeout && timeout < 100) {
1811                 if (timeout < 10) {
1812                         pr_err("timeout must be >= 10ms.\n");
1813                         parse_options_usage(stat_usage, stat_options, "timeout", 0);
1814                         goto out;
1815                 } else
1816                         pr_warning("timeout < 100ms. "
1817                                    "The overhead percentage could be high in some cases. "
1818                                    "Please proceed with caution.\n");
1819         }
1820         if (timeout && interval) {
1821                 pr_err("timeout option is not supported with interval-print.\n");
1822                 parse_options_usage(stat_usage, stat_options, "timeout", 0);
1823                 parse_options_usage(stat_usage, stat_options, "I", 1);
1824                 goto out;
1825         }
1826
1827         if (perf_evlist__alloc_stats(evsel_list, interval))
1828                 goto out;
1829
1830         if (perf_stat_init_aggr_mode())
1831                 goto out;
1832
1833         /*
1834          * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless
1835          * while avoiding that older tools show confusing messages.
1836          *
1837          * However for pipe sessions we need to keep it zero,
1838          * because script's perf_evsel__check_attr is triggered
1839          * by attr->sample_type != 0, and we can't run it on
1840          * stat sessions.
1841          */
1842         stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe);
1843
1844         /*
1845          * We dont want to block the signals - that would cause
1846          * child tasks to inherit that and Ctrl-C would not work.
1847          * What we want is for Ctrl-C to work in the exec()-ed
1848          * task, but being ignored by perf stat itself:
1849          */
1850         atexit(sig_atexit);
1851         if (!forever)
1852                 signal(SIGINT,  skip_signal);
1853         signal(SIGCHLD, skip_signal);
1854         signal(SIGALRM, skip_signal);
1855         signal(SIGABRT, skip_signal);
1856
1857         status = 0;
1858         for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) {
1859                 if (stat_config.run_count != 1 && verbose > 0)
1860                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1861                                 run_idx + 1);
1862
1863                 status = run_perf_stat(argc, argv, run_idx);
1864                 if (forever && status != -1) {
1865                         print_counters(NULL, argc, argv);
1866                         perf_stat__reset_stats();
1867                 }
1868         }
1869
1870         if (!forever && status != -1 && !interval)
1871                 print_counters(NULL, argc, argv);
1872
1873         if (STAT_RECORD) {
1874                 /*
1875                  * We synthesize the kernel mmap record just so that older tools
1876                  * don't emit warnings about not being able to resolve symbols
1877                  * due to /proc/sys/kernel/kptr_restrict settings and instear provide
1878                  * a saner message about no samples being in the perf.data file.
1879                  *
1880                  * This also serves to suppress a warning about f_header.data.size == 0
1881                  * in header.c at the moment 'perf stat record' gets introduced, which
1882                  * is not really needed once we start adding the stat specific PERF_RECORD_
1883                  * records, but the need to suppress the kptr_restrict messages in older
1884                  * tools remain  -acme
1885                  */
1886                 int fd = perf_data__fd(&perf_stat.data);
1887                 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat,
1888                                                              process_synthesized_event,
1889                                                              &perf_stat.session->machines.host);
1890                 if (err) {
1891                         pr_warning("Couldn't synthesize the kernel mmap record, harmless, "
1892                                    "older tools may produce warnings about this file\n.");
1893                 }
1894
1895                 if (!interval) {
1896                         if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL))
1897                                 pr_err("failed to write stat round event\n");
1898                 }
1899
1900                 if (!perf_stat.data.is_pipe) {
1901                         perf_stat.session->header.data_size += perf_stat.bytes_written;
1902                         perf_session__write_header(perf_stat.session, evsel_list, fd, true);
1903                 }
1904
1905                 perf_session__delete(perf_stat.session);
1906         }
1907
1908         perf_stat__exit_aggr_mode();
1909         perf_evlist__free_stats(evsel_list);
1910 out:
1911         free(stat_config.walltime_run);
1912
1913         if (smi_cost && smi_reset)
1914                 sysfs__write_int(FREEZE_ON_SMI_PATH, 0);
1915
1916         perf_evlist__delete(evsel_list);
1917
1918         runtime_stat_delete(&stat_config);
1919
1920         return status;
1921 }