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/util.h"
  47 #include "util/parse-options.h"
  48 #include "util/parse-events.h"
  49 #include "util/pmu.h"
  50 #include "util/event.h"
  51 #include "util/evlist.h"
  52 #include "util/evsel.h"
  53 #include "util/debug.h"
  54 #include "util/color.h"
  55 #include "util/stat.h"
  56 #include "util/header.h"
  57 #include "util/cpumap.h"
  58 #include "util/thread.h"
  59 #include "util/thread_map.h"
  60
  61 #include <stdlib.h>
  62 #include <sys/prctl.h>
  63 #include <locale.h>
  64
  65 #define DEFAULT_SEPARATOR       " "
  66 #define CNTR_NOT_SUPPORTED      "<not supported>"
  67 #define CNTR_NOT_COUNTED        "<not counted>"
  68
  69 static void print_stat(int argc, const char **argv);
  70 static void print_counter_aggr(struct perf_evsel *counter, char *prefix);
  71 static void print_counter(struct perf_evsel *counter, char *prefix);
  72 static void print_aggr(char *prefix);
  73
  74 /* Default events used for perf stat -T */
  75 static const char * const transaction_attrs[] = {
  76         "task-clock",
  77         "{"
  78         "instructions,"
  79         "cycles,"
  80         "cpu/cycles-t/,"
  81         "cpu/tx-start/,"
  82         "cpu/el-start/,"
  83         "cpu/cycles-ct/"
  84         "}"
  85 };
  86
  87 /* More limited version when the CPU does not have all events. */
  88 static const char * const transaction_limited_attrs[] = {
  89         "task-clock",
  90         "{"
  91         "instructions,"
  92         "cycles,"
  93         "cpu/cycles-t/,"
  94         "cpu/tx-start/"
  95         "}"
  96 };
  97
  98 /* must match transaction_attrs and the beginning limited_attrs */
  99 enum {
 100         T_TASK_CLOCK,
 101         T_INSTRUCTIONS,
 102         T_CYCLES,
 103         T_CYCLES_IN_TX,
 104         T_TRANSACTION_START,
 105         T_ELISION_START,
 106         T_CYCLES_IN_TX_CP,
 107 };
 108
 109 static struct perf_evlist       *evsel_list;
 110
 111 static struct target target = {
 112         .uid    = UINT_MAX,
 113 };
 114
 115 enum aggr_mode {
 116         AGGR_NONE,
 117         AGGR_GLOBAL,
 118         AGGR_SOCKET,
 119         AGGR_CORE,
 120 };
 121
 122 static int                      run_count                       =  1;
 123 static bool                     no_inherit                      = false;
 124 static bool                     scale                           =  true;
 125 static enum aggr_mode           aggr_mode                       = AGGR_GLOBAL;
 126 static volatile pid_t           child_pid                       = -1;
 127 static bool                     null_run                        =  false;
 128 static int                      detailed_run                    =  0;
 129 static bool                     transaction_run;
 130 static bool                     big_num                         =  true;
 131 static int                      big_num_opt                     =  -1;
 132 static const char               *csv_sep                        = NULL;
 133 static bool                     csv_output                      = false;
 134 static bool                     group                           = false;
 135 static FILE                     *output                         = NULL;
 136 static const char               *pre_cmd                        = NULL;
 137 static const char               *post_cmd                       = NULL;
 138 static bool                     sync_run                        = false;
 139 static unsigned int             interval                        = 0;
 140 static unsigned int             initial_delay                   = 0;
 141 static unsigned int             unit_width                      = 4; /* strlen("unit") */
 142 static bool                     forever                         = false;
 143 static struct timespec          ref_time;
 144 static struct cpu_map           *aggr_map;
 145 static int                      (*aggr_get_id)(struct cpu_map *m, int cpu);
 146
 147 static volatile int done = 0;
 148
 149 struct perf_stat {
 150         struct stats      res_stats[3];
 151 };
 152
 153 static inline void diff_timespec(struct timespec *r, struct timespec *a,
 154                                  struct timespec *b)
 155 {
 156         r->tv_sec = a->tv_sec - b->tv_sec;
 157         if (a->tv_nsec < b->tv_nsec) {
 158                 r->tv_nsec = a->tv_nsec + 1000000000L - b->tv_nsec;
 159                 r->tv_sec--;
 160         } else {
 161                 r->tv_nsec = a->tv_nsec - b->tv_nsec ;
 162         }
 163 }
 164
 165 static inline struct cpu_map *perf_evsel__cpus(struct perf_evsel *evsel)
 166 {
 167         return (evsel->cpus && !target.cpu_list) ? evsel->cpus : evsel_list->cpus;
 168 }
 169
 170 static inline int perf_evsel__nr_cpus(struct perf_evsel *evsel)
 171 {
 172         return perf_evsel__cpus(evsel)->nr;
 173 }
 174
 175 static void perf_evsel__reset_stat_priv(struct perf_evsel *evsel)
 176 {
 177         memset(evsel->priv, 0, sizeof(struct perf_stat));
 178 }
 179
 180 static int perf_evsel__alloc_stat_priv(struct perf_evsel *evsel)
 181 {
 182         evsel->priv = zalloc(sizeof(struct perf_stat));
 183         return evsel->priv == NULL ? -ENOMEM : 0;
 184 }
 185
 186 static void perf_evsel__free_stat_priv(struct perf_evsel *evsel)
 187 {
 188         zfree(&evsel->priv);
 189 }
 190
 191 static int perf_evsel__alloc_prev_raw_counts(struct perf_evsel *evsel)
 192 {
 193         void *addr;
 194         size_t sz;
 195
 196         sz = sizeof(*evsel->counts) +
 197              (perf_evsel__nr_cpus(evsel) * sizeof(struct perf_counts_values));
 198
 199         addr = zalloc(sz);
 200         if (!addr)
 201                 return -ENOMEM;
 202
 203         evsel->prev_raw_counts =  addr;
 204
 205         return 0;
 206 }
 207
 208 static void perf_evsel__free_prev_raw_counts(struct perf_evsel *evsel)
 209 {
 210         zfree(&evsel->prev_raw_counts);
 211 }
 212
 213 static void perf_evlist__free_stats(struct perf_evlist *evlist)
 214 {
 215         struct perf_evsel *evsel;
 216
 217         evlist__for_each(evlist, evsel) {
 218                 perf_evsel__free_stat_priv(evsel);
 219                 perf_evsel__free_counts(evsel);
 220                 perf_evsel__free_prev_raw_counts(evsel);
 221         }
 222 }
 223
 224 static int perf_evlist__alloc_stats(struct perf_evlist *evlist, bool alloc_raw)
 225 {
 226         struct perf_evsel *evsel;
 227
 228         evlist__for_each(evlist, evsel) {
 229                 if (perf_evsel__alloc_stat_priv(evsel) < 0 ||
 230                     perf_evsel__alloc_counts(evsel, perf_evsel__nr_cpus(evsel)) < 0 ||
 231                     (alloc_raw && perf_evsel__alloc_prev_raw_counts(evsel) < 0))
 232                         goto out_free;
 233         }
 234
 235         return 0;
 236
 237 out_free:
 238         perf_evlist__free_stats(evlist);
 239         return -1;
 240 }
 241
 242 static struct stats runtime_nsecs_stats[MAX_NR_CPUS];
 243 static struct stats runtime_cycles_stats[MAX_NR_CPUS];
 244 static struct stats runtime_stalled_cycles_front_stats[MAX_NR_CPUS];
 245 static struct stats runtime_stalled_cycles_back_stats[MAX_NR_CPUS];
 246 static struct stats runtime_branches_stats[MAX_NR_CPUS];
 247 static struct stats runtime_cacherefs_stats[MAX_NR_CPUS];
 248 static struct stats runtime_l1_dcache_stats[MAX_NR_CPUS];
 249 static struct stats runtime_l1_icache_stats[MAX_NR_CPUS];
 250 static struct stats runtime_ll_cache_stats[MAX_NR_CPUS];
 251 static struct stats runtime_itlb_cache_stats[MAX_NR_CPUS];
 252 static struct stats runtime_dtlb_cache_stats[MAX_NR_CPUS];
 253 static struct stats runtime_cycles_in_tx_stats[MAX_NR_CPUS];
 254 static struct stats walltime_nsecs_stats;
 255 static struct stats runtime_transaction_stats[MAX_NR_CPUS];
 256 static struct stats runtime_elision_stats[MAX_NR_CPUS];
 257
 258 static void perf_stat__reset_stats(struct perf_evlist *evlist)
 259 {
 260         struct perf_evsel *evsel;
 261
 262         evlist__for_each(evlist, evsel) {
 263                 perf_evsel__reset_stat_priv(evsel);
 264                 perf_evsel__reset_counts(evsel, perf_evsel__nr_cpus(evsel));
 265         }
 266
 267         memset(runtime_nsecs_stats, 0, sizeof(runtime_nsecs_stats));
 268         memset(runtime_cycles_stats, 0, sizeof(runtime_cycles_stats));
 269         memset(runtime_stalled_cycles_front_stats, 0, sizeof(runtime_stalled_cycles_front_stats));
 270         memset(runtime_stalled_cycles_back_stats, 0, sizeof(runtime_stalled_cycles_back_stats));
 271         memset(runtime_branches_stats, 0, sizeof(runtime_branches_stats));
 272         memset(runtime_cacherefs_stats, 0, sizeof(runtime_cacherefs_stats));
 273         memset(runtime_l1_dcache_stats, 0, sizeof(runtime_l1_dcache_stats));
 274         memset(runtime_l1_icache_stats, 0, sizeof(runtime_l1_icache_stats));
 275         memset(runtime_ll_cache_stats, 0, sizeof(runtime_ll_cache_stats));
 276         memset(runtime_itlb_cache_stats, 0, sizeof(runtime_itlb_cache_stats));
 277         memset(runtime_dtlb_cache_stats, 0, sizeof(runtime_dtlb_cache_stats));
 278         memset(runtime_cycles_in_tx_stats, 0,
 279                         sizeof(runtime_cycles_in_tx_stats));
 280         memset(runtime_transaction_stats, 0,
 281                 sizeof(runtime_transaction_stats));
 282         memset(runtime_elision_stats, 0, sizeof(runtime_elision_stats));
 283         memset(&walltime_nsecs_stats, 0, sizeof(walltime_nsecs_stats));
 284 }
 285
 286 static int create_perf_stat_counter(struct perf_evsel *evsel)
 287 {
 288         struct perf_event_attr *attr = &evsel->attr;
 289
 290         if (scale)
 291                 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
 292                                     PERF_FORMAT_TOTAL_TIME_RUNNING;
 293
 294         attr->inherit = !no_inherit;
 295
 296         if (target__has_cpu(&target))
 297                 return perf_evsel__open_per_cpu(evsel, perf_evsel__cpus(evsel));
 298
 299         if (!target__has_task(&target) && perf_evsel__is_group_leader(evsel)) {
 300                 attr->disabled = 1;
 301                 if (!initial_delay)
 302                         attr->enable_on_exec = 1;
 303         }
 304
 305         return perf_evsel__open_per_thread(evsel, evsel_list->threads);
 306 }
 307
 308 /*
 309  * Does the counter have nsecs as a unit?
 310  */
 311 static inline int nsec_counter(struct perf_evsel *evsel)
 312 {
 313         if (perf_evsel__match(evsel, SOFTWARE, SW_CPU_CLOCK) ||
 314             perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 315                 return 1;
 316
 317         return 0;
 318 }
 319
 320 static struct perf_evsel *nth_evsel(int n)
 321 {
 322         static struct perf_evsel **array;
 323         static int array_len;
 324         struct perf_evsel *ev;
 325         int j;
 326
 327         /* Assumes this only called when evsel_list does not change anymore. */
 328         if (!array) {
 329                 evlist__for_each(evsel_list, ev)
 330                         array_len++;
 331                 array = malloc(array_len * sizeof(void *));
 332                 if (!array)
 333                         exit(ENOMEM);
 334                 j = 0;
 335                 evlist__for_each(evsel_list, ev)
 336                         array[j++] = ev;
 337         }
 338         if (n < array_len)
 339                 return array[n];
 340         return NULL;
 341 }
 342
 343 /*
 344  * Update various tracking values we maintain to print
 345  * more semantic information such as miss/hit ratios,
 346  * instruction rates, etc:
 347  */
 348 static void update_shadow_stats(struct perf_evsel *counter, u64 *count)
 349 {
 350         if (perf_evsel__match(counter, SOFTWARE, SW_TASK_CLOCK))
 351                 update_stats(&runtime_nsecs_stats[0], count[0]);
 352         else if (perf_evsel__match(counter, HARDWARE, HW_CPU_CYCLES))
 353                 update_stats(&runtime_cycles_stats[0], count[0]);
 354         else if (transaction_run &&
 355                  perf_evsel__cmp(counter, nth_evsel(T_CYCLES_IN_TX)))
 356                 update_stats(&runtime_cycles_in_tx_stats[0], count[0]);
 357         else if (transaction_run &&
 358                  perf_evsel__cmp(counter, nth_evsel(T_TRANSACTION_START)))
 359                 update_stats(&runtime_transaction_stats[0], count[0]);
 360         else if (transaction_run &&
 361                  perf_evsel__cmp(counter, nth_evsel(T_ELISION_START)))
 362                 update_stats(&runtime_elision_stats[0], count[0]);
 363         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_FRONTEND))
 364                 update_stats(&runtime_stalled_cycles_front_stats[0], count[0]);
 365         else if (perf_evsel__match(counter, HARDWARE, HW_STALLED_CYCLES_BACKEND))
 366                 update_stats(&runtime_stalled_cycles_back_stats[0], count[0]);
 367         else if (perf_evsel__match(counter, HARDWARE, HW_BRANCH_INSTRUCTIONS))
 368                 update_stats(&runtime_branches_stats[0], count[0]);
 369         else if (perf_evsel__match(counter, HARDWARE, HW_CACHE_REFERENCES))
 370                 update_stats(&runtime_cacherefs_stats[0], count[0]);
 371         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1D))
 372                 update_stats(&runtime_l1_dcache_stats[0], count[0]);
 373         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_L1I))
 374                 update_stats(&runtime_l1_icache_stats[0], count[0]);
 375         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_LL))
 376                 update_stats(&runtime_ll_cache_stats[0], count[0]);
 377         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_DTLB))
 378                 update_stats(&runtime_dtlb_cache_stats[0], count[0]);
 379         else if (perf_evsel__match(counter, HW_CACHE, HW_CACHE_ITLB))
 380                 update_stats(&runtime_itlb_cache_stats[0], count[0]);
 381 }
 382
 383 /*
 384  * Read out the results of a single counter:
 385  * aggregate counts across CPUs in system-wide mode
 386  */
 387 static int read_counter_aggr(struct perf_evsel *counter)
 388 {
 389         struct perf_stat *ps = counter->priv;
 390         u64 *count = counter->counts->aggr.values;
 391         int i;
 392
 393         if (__perf_evsel__read(counter, perf_evsel__nr_cpus(counter),
 394                                thread_map__nr(evsel_list->threads), scale) < 0)
 395                 return -1;
 396
 397         for (i = 0; i < 3; i++)
 398                 update_stats(&ps->res_stats[i], count[i]);
 399
 400         if (verbose) {
 401                 fprintf(output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 402                         perf_evsel__name(counter), count[0], count[1], count[2]);
 403         }
 404
 405         /*
 406          * Save the full runtime - to allow normalization during printout:
 407          */
 408         update_shadow_stats(counter, count);
 409
 410         return 0;
 411 }
 412
 413 /*
 414  * Read out the results of a single counter:
 415  * do not aggregate counts across CPUs in system-wide mode
 416  */
 417 static int read_counter(struct perf_evsel *counter)
 418 {
 419         u64 *count;
 420         int cpu;
 421
 422         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
 423                 if (__perf_evsel__read_on_cpu(counter, cpu, 0, scale) < 0)
 424                         return -1;
 425
 426                 count = counter->counts->cpu[cpu].values;
 427
 428                 update_shadow_stats(counter, count);
 429         }
 430
 431         return 0;
 432 }
 433
 434 static void print_interval(void)
 435 {
 436         static int num_print_interval;
 437         struct perf_evsel *counter;
 438         struct perf_stat *ps;
 439         struct timespec ts, rs;
 440         char prefix[64];
 441
 442         if (aggr_mode == AGGR_GLOBAL) {
 443                 evlist__for_each(evsel_list, counter) {
 444                         ps = counter->priv;
 445                         memset(ps->res_stats, 0, sizeof(ps->res_stats));
 446                         read_counter_aggr(counter);
 447                 }
 448         } else  {
 449                 evlist__for_each(evsel_list, counter) {
 450                         ps = counter->priv;
 451                         memset(ps->res_stats, 0, sizeof(ps->res_stats));
 452                         read_counter(counter);
 453                 }
 454         }
 455
 456         clock_gettime(CLOCK_MONOTONIC, &ts);
 457         diff_timespec(&rs, &ts, &ref_time);
 458         sprintf(prefix, "%6lu.%09lu%s", rs.tv_sec, rs.tv_nsec, csv_sep);
 459
 460         if (num_print_interval == 0 && !csv_output) {
 461                 switch (aggr_mode) {
 462                 case AGGR_SOCKET:
 463                         fprintf(output, "#           time socket cpus             counts %*s events\n", unit_width, "unit");
 464                         break;
 465                 case AGGR_CORE:
 466                         fprintf(output, "#           time core         cpus             counts %*s events\n", unit_width, "unit");
 467                         break;
 468                 case AGGR_NONE:
 469                         fprintf(output, "#           time CPU                counts %*s events\n", unit_width, "unit");
 470                         break;
 471                 case AGGR_GLOBAL:
 472                 default:
 473                         fprintf(output, "#           time             counts %*s events\n", unit_width, "unit");
 474                 }
 475         }
 476
 477         if (++num_print_interval == 25)
 478                 num_print_interval = 0;
 479
 480         switch (aggr_mode) {
 481         case AGGR_CORE:
 482         case AGGR_SOCKET:
 483                 print_aggr(prefix);
 484                 break;
 485         case AGGR_NONE:
 486                 evlist__for_each(evsel_list, counter)
 487                         print_counter(counter, prefix);
 488                 break;
 489         case AGGR_GLOBAL:
 490         default:
 491                 evlist__for_each(evsel_list, counter)
 492                         print_counter_aggr(counter, prefix);
 493         }
 494
 495         fflush(output);
 496 }
 497
 498 static void handle_initial_delay(void)
 499 {
 500         struct perf_evsel *counter;
 501
 502         if (initial_delay) {
 503                 const int ncpus = cpu_map__nr(evsel_list->cpus),
 504                         nthreads = thread_map__nr(evsel_list->threads);
 505
 506                 usleep(initial_delay * 1000);
 507                 evlist__for_each(evsel_list, counter)
 508                         perf_evsel__enable(counter, ncpus, nthreads);
 509         }
 510 }
 511
 512 static volatile int workload_exec_errno;
 513
 514 /*
 515  * perf_evlist__prepare_workload will send a SIGUSR1
 516  * if the fork fails, since we asked by setting its
 517  * want_signal to true.
 518  */
 519 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info,
 520                                         void *ucontext __maybe_unused)
 521 {
 522         workload_exec_errno = info->si_value.sival_int;
 523 }
 524
 525 static int __run_perf_stat(int argc, const char **argv)
 526 {
 527         char msg[512];
 528         unsigned long long t0, t1;
 529         struct perf_evsel *counter;
 530         struct timespec ts;
 531         size_t l;
 532         int status = 0;
 533         const bool forks = (argc > 0);
 534
 535         if (interval) {
 536                 ts.tv_sec  = interval / 1000;
 537                 ts.tv_nsec = (interval % 1000) * 1000000;
 538         } else {
 539                 ts.tv_sec  = 1;
 540                 ts.tv_nsec = 0;
 541         }
 542
 543         if (forks) {
 544                 if (perf_evlist__prepare_workload(evsel_list, &target, argv, false,
 545                                                   workload_exec_failed_signal) < 0) {
 546                         perror("failed to prepare workload");
 547                         return -1;
 548                 }
 549                 child_pid = evsel_list->workload.pid;
 550         }
 551
 552         if (group)
 553                 perf_evlist__set_leader(evsel_list);
 554
 555         evlist__for_each(evsel_list, counter) {
 556                 if (create_perf_stat_counter(counter) < 0) {
 557                         /*
 558                          * PPC returns ENXIO for HW counters until 2.6.37
 559                          * (behavior changed with commit b0a873e).
 560                          */
 561                         if (errno == EINVAL || errno == ENOSYS ||
 562                             errno == ENOENT || errno == EOPNOTSUPP ||
 563                             errno == ENXIO) {
 564                                 if (verbose)
 565                                         ui__warning("%s event is not supported by the kernel.\n",
 566                                                     perf_evsel__name(counter));
 567                                 counter->supported = false;
 568                                 continue;
 569                         }
 570
 571                         perf_evsel__open_strerror(counter, &target,
 572                                                   errno, msg, sizeof(msg));
 573                         ui__error("%s\n", msg);
 574
 575                         if (child_pid != -1)
 576                                 kill(child_pid, SIGTERM);
 577
 578                         return -1;
 579                 }
 580                 counter->supported = true;
 581
 582                 l = strlen(counter->unit);
 583                 if (l > unit_width)
 584                         unit_width = l;
 585         }
 586
 587         if (perf_evlist__apply_filters(evsel_list)) {
 588                 error("failed to set filter with %d (%s)\n", errno,
 589                         strerror(errno));
 590                 return -1;
 591         }
 592
 593         /*
 594          * Enable counters and exec the command:
 595          */
 596         t0 = rdclock();
 597         clock_gettime(CLOCK_MONOTONIC, &ref_time);
 598
 599         if (forks) {
 600                 perf_evlist__start_workload(evsel_list);
 601                 handle_initial_delay();
 602
 603                 if (interval) {
 604                         while (!waitpid(child_pid, &status, WNOHANG)) {
 605                                 nanosleep(&ts, NULL);
 606                                 print_interval();
 607                         }
 608                 }
 609                 wait(&status);
 610
 611                 if (workload_exec_errno) {
 612                         const char *emsg = strerror_r(workload_exec_errno, msg, sizeof(msg));
 613                         pr_err("Workload failed: %s\n", emsg);
 614                         return -1;
 615                 }
 616
 617                 if (WIFSIGNALED(status))
 618                         psignal(WTERMSIG(status), argv[0]);
 619         } else {
 620                 handle_initial_delay();
 621                 while (!done) {
 622                         nanosleep(&ts, NULL);
 623                         if (interval)
 624                                 print_interval();
 625                 }
 626         }
 627
 628         t1 = rdclock();
 629
 630         update_stats(&walltime_nsecs_stats, t1 - t0);
 631
 632         if (aggr_mode == AGGR_GLOBAL) {
 633                 evlist__for_each(evsel_list, counter) {
 634                         read_counter_aggr(counter);
 635                         perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter),
 636                                              thread_map__nr(evsel_list->threads));
 637                 }
 638         } else {
 639                 evlist__for_each(evsel_list, counter) {
 640                         read_counter(counter);
 641                         perf_evsel__close_fd(counter, perf_evsel__nr_cpus(counter), 1);
 642                 }
 643         }
 644
 645         return WEXITSTATUS(status);
 646 }
 647
 648 static int run_perf_stat(int argc, const char **argv)
 649 {
 650         int ret;
 651
 652         if (pre_cmd) {
 653                 ret = system(pre_cmd);
 654                 if (ret)
 655                         return ret;
 656         }
 657
 658         if (sync_run)
 659                 sync();
 660
 661         ret = __run_perf_stat(argc, argv);
 662         if (ret)
 663                 return ret;
 664
 665         if (post_cmd) {
 666                 ret = system(post_cmd);
 667                 if (ret)
 668                         return ret;
 669         }
 670
 671         return ret;
 672 }
 673
 674 static void print_noise_pct(double total, double avg)
 675 {
 676         double pct = rel_stddev_stats(total, avg);
 677
 678         if (csv_output)
 679                 fprintf(output, "%s%.2f%%", csv_sep, pct);
 680         else if (pct)
 681                 fprintf(output, "  ( +-%6.2f%% )", pct);
 682 }
 683
 684 static void print_noise(struct perf_evsel *evsel, double avg)
 685 {
 686         struct perf_stat *ps;
 687
 688         if (run_count == 1)
 689                 return;
 690
 691         ps = evsel->priv;
 692         print_noise_pct(stddev_stats(&ps->res_stats[0]), avg);
 693 }
 694
 695 static void aggr_printout(struct perf_evsel *evsel, int id, int nr)
 696 {
 697         switch (aggr_mode) {
 698         case AGGR_CORE:
 699                 fprintf(output, "S%d-C%*d%s%*d%s",
 700                         cpu_map__id_to_socket(id),
 701                         csv_output ? 0 : -8,
 702                         cpu_map__id_to_cpu(id),
 703                         csv_sep,
 704                         csv_output ? 0 : 4,
 705                         nr,
 706                         csv_sep);
 707                 break;
 708         case AGGR_SOCKET:
 709                 fprintf(output, "S%*d%s%*d%s",
 710                         csv_output ? 0 : -5,
 711                         id,
 712                         csv_sep,
 713                         csv_output ? 0 : 4,
 714                         nr,
 715                         csv_sep);
 716                         break;
 717         case AGGR_NONE:
 718                 fprintf(output, "CPU%*d%s",
 719                         csv_output ? 0 : -4,
 720                         perf_evsel__cpus(evsel)->map[id], csv_sep);
 721                 break;
 722         case AGGR_GLOBAL:
 723         default:
 724                 break;
 725         }
 726 }
 727
 728 static void nsec_printout(int cpu, int nr, struct perf_evsel *evsel, double avg)
 729 {
 730         double msecs = avg / 1e6;
 731         const char *fmt_v, *fmt_n;
 732         char name[25];
 733
 734         fmt_v = csv_output ? "%.6f%s" : "%18.6f%s";
 735         fmt_n = csv_output ? "%s" : "%-25s";
 736
 737         aggr_printout(evsel, cpu, nr);
 738
 739         scnprintf(name, sizeof(name), "%s%s",
 740                   perf_evsel__name(evsel), csv_output ? "" : " (msec)");
 741
 742         fprintf(output, fmt_v, msecs, csv_sep);
 743
 744         if (csv_output)
 745                 fprintf(output, "%s%s", evsel->unit, csv_sep);
 746         else
 747                 fprintf(output, "%-*s%s", unit_width, evsel->unit, csv_sep);
 748
 749         fprintf(output, fmt_n, name);
 750
 751         if (evsel->cgrp)
 752                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 753
 754         if (csv_output || interval)
 755                 return;
 756
 757         if (perf_evsel__match(evsel, SOFTWARE, SW_TASK_CLOCK))
 758                 fprintf(output, " # %8.3f CPUs utilized          ",
 759                         avg / avg_stats(&walltime_nsecs_stats));
 760         else
 761                 fprintf(output, "                                   ");
 762 }
 763
 764 /* used for get_ratio_color() */
 765 enum grc_type {
 766         GRC_STALLED_CYCLES_FE,
 767         GRC_STALLED_CYCLES_BE,
 768         GRC_CACHE_MISSES,
 769         GRC_MAX_NR
 770 };
 771
 772 static const char *get_ratio_color(enum grc_type type, double ratio)
 773 {
 774         static const double grc_table[GRC_MAX_NR][3] = {
 775                 [GRC_STALLED_CYCLES_FE] = { 50.0, 30.0, 10.0 },
 776                 [GRC_STALLED_CYCLES_BE] = { 75.0, 50.0, 20.0 },
 777                 [GRC_CACHE_MISSES]      = { 20.0, 10.0, 5.0 },
 778         };
 779         const char *color = PERF_COLOR_NORMAL;
 780
 781         if (ratio > grc_table[type][0])
 782                 color = PERF_COLOR_RED;
 783         else if (ratio > grc_table[type][1])
 784                 color = PERF_COLOR_MAGENTA;
 785         else if (ratio > grc_table[type][2])
 786                 color = PERF_COLOR_YELLOW;
 787
 788         return color;
 789 }
 790
 791 static void print_stalled_cycles_frontend(int cpu,
 792                                           struct perf_evsel *evsel
 793                                           __maybe_unused, double avg)
 794 {
 795         double total, ratio = 0.0;
 796         const char *color;
 797
 798         total = avg_stats(&runtime_cycles_stats[cpu]);
 799
 800         if (total)
 801                 ratio = avg / total * 100.0;
 802
 803         color = get_ratio_color(GRC_STALLED_CYCLES_FE, ratio);
 804
 805         fprintf(output, " #  ");
 806         color_fprintf(output, color, "%6.2f%%", ratio);
 807         fprintf(output, " frontend cycles idle   ");
 808 }
 809
 810 static void print_stalled_cycles_backend(int cpu,
 811                                          struct perf_evsel *evsel
 812                                          __maybe_unused, double avg)
 813 {
 814         double total, ratio = 0.0;
 815         const char *color;
 816
 817         total = avg_stats(&runtime_cycles_stats[cpu]);
 818
 819         if (total)
 820                 ratio = avg / total * 100.0;
 821
 822         color = get_ratio_color(GRC_STALLED_CYCLES_BE, ratio);
 823
 824         fprintf(output, " #  ");
 825         color_fprintf(output, color, "%6.2f%%", ratio);
 826         fprintf(output, " backend  cycles idle   ");
 827 }
 828
 829 static void print_branch_misses(int cpu,
 830                                 struct perf_evsel *evsel __maybe_unused,
 831                                 double avg)
 832 {
 833         double total, ratio = 0.0;
 834         const char *color;
 835
 836         total = avg_stats(&runtime_branches_stats[cpu]);
 837
 838         if (total)
 839                 ratio = avg / total * 100.0;
 840
 841         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 842
 843         fprintf(output, " #  ");
 844         color_fprintf(output, color, "%6.2f%%", ratio);
 845         fprintf(output, " of all branches        ");
 846 }
 847
 848 static void print_l1_dcache_misses(int cpu,
 849                                    struct perf_evsel *evsel __maybe_unused,
 850                                    double avg)
 851 {
 852         double total, ratio = 0.0;
 853         const char *color;
 854
 855         total = avg_stats(&runtime_l1_dcache_stats[cpu]);
 856
 857         if (total)
 858                 ratio = avg / total * 100.0;
 859
 860         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 861
 862         fprintf(output, " #  ");
 863         color_fprintf(output, color, "%6.2f%%", ratio);
 864         fprintf(output, " of all L1-dcache hits  ");
 865 }
 866
 867 static void print_l1_icache_misses(int cpu,
 868                                    struct perf_evsel *evsel __maybe_unused,
 869                                    double avg)
 870 {
 871         double total, ratio = 0.0;
 872         const char *color;
 873
 874         total = avg_stats(&runtime_l1_icache_stats[cpu]);
 875
 876         if (total)
 877                 ratio = avg / total * 100.0;
 878
 879         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 880
 881         fprintf(output, " #  ");
 882         color_fprintf(output, color, "%6.2f%%", ratio);
 883         fprintf(output, " of all L1-icache hits  ");
 884 }
 885
 886 static void print_dtlb_cache_misses(int cpu,
 887                                     struct perf_evsel *evsel __maybe_unused,
 888                                     double avg)
 889 {
 890         double total, ratio = 0.0;
 891         const char *color;
 892
 893         total = avg_stats(&runtime_dtlb_cache_stats[cpu]);
 894
 895         if (total)
 896                 ratio = avg / total * 100.0;
 897
 898         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 899
 900         fprintf(output, " #  ");
 901         color_fprintf(output, color, "%6.2f%%", ratio);
 902         fprintf(output, " of all dTLB cache hits ");
 903 }
 904
 905 static void print_itlb_cache_misses(int cpu,
 906                                     struct perf_evsel *evsel __maybe_unused,
 907                                     double avg)
 908 {
 909         double total, ratio = 0.0;
 910         const char *color;
 911
 912         total = avg_stats(&runtime_itlb_cache_stats[cpu]);
 913
 914         if (total)
 915                 ratio = avg / total * 100.0;
 916
 917         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 918
 919         fprintf(output, " #  ");
 920         color_fprintf(output, color, "%6.2f%%", ratio);
 921         fprintf(output, " of all iTLB cache hits ");
 922 }
 923
 924 static void print_ll_cache_misses(int cpu,
 925                                   struct perf_evsel *evsel __maybe_unused,
 926                                   double avg)
 927 {
 928         double total, ratio = 0.0;
 929         const char *color;
 930
 931         total = avg_stats(&runtime_ll_cache_stats[cpu]);
 932
 933         if (total)
 934                 ratio = avg / total * 100.0;
 935
 936         color = get_ratio_color(GRC_CACHE_MISSES, ratio);
 937
 938         fprintf(output, " #  ");
 939         color_fprintf(output, color, "%6.2f%%", ratio);
 940         fprintf(output, " of all LL-cache hits   ");
 941 }
 942
 943 static void abs_printout(int cpu, int nr, struct perf_evsel *evsel, double avg)
 944 {
 945         double total, ratio = 0.0, total2;
 946         double sc =  evsel->scale;
 947         const char *fmt;
 948
 949         if (csv_output) {
 950                 fmt = sc != 1.0 ?  "%.2f%s" : "%.0f%s";
 951         } else {
 952                 if (big_num)
 953                         fmt = sc != 1.0 ? "%'18.2f%s" : "%'18.0f%s";
 954                 else
 955                         fmt = sc != 1.0 ? "%18.2f%s" : "%18.0f%s";
 956         }
 957
 958         aggr_printout(evsel, cpu, nr);
 959
 960         if (aggr_mode == AGGR_GLOBAL)
 961                 cpu = 0;
 962
 963         fprintf(output, fmt, avg, csv_sep);
 964
 965         if (evsel->unit)
 966                 fprintf(output, "%-*s%s",
 967                         csv_output ? 0 : unit_width,
 968                         evsel->unit, csv_sep);
 969
 970         fprintf(output, "%-*s", csv_output ? 0 : 25, perf_evsel__name(evsel));
 971
 972         if (evsel->cgrp)
 973                 fprintf(output, "%s%s", csv_sep, evsel->cgrp->name);
 974
 975         if (csv_output || interval)
 976                 return;
 977
 978         if (perf_evsel__match(evsel, HARDWARE, HW_INSTRUCTIONS)) {
 979                 total = avg_stats(&runtime_cycles_stats[cpu]);
 980                 if (total) {
 981                         ratio = avg / total;
 982                         fprintf(output, " #   %5.2f  insns per cycle        ", ratio);
 983                 }
 984                 total = avg_stats(&runtime_stalled_cycles_front_stats[cpu]);
 985                 total = max(total, avg_stats(&runtime_stalled_cycles_back_stats[cpu]));
 986
 987                 if (total && avg) {
 988                         ratio = total / avg;
 989                         fprintf(output, "\n");
 990                         if (aggr_mode == AGGR_NONE)
 991                                 fprintf(output, "        ");
 992                         fprintf(output, "                                                  #   %5.2f  stalled cycles per insn", ratio);
 993                 }
 994
 995         } else if (perf_evsel__match(evsel, HARDWARE, HW_BRANCH_MISSES) &&
 996                         runtime_branches_stats[cpu].n != 0) {
 997                 print_branch_misses(cpu, evsel, avg);
 998         } else if (
 999                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1000                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1D |
1001                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1002                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1003                         runtime_l1_dcache_stats[cpu].n != 0) {
1004                 print_l1_dcache_misses(cpu, evsel, avg);
1005         } else if (
1006                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1007                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_L1I |
1008                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1009                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1010                         runtime_l1_icache_stats[cpu].n != 0) {
1011                 print_l1_icache_misses(cpu, evsel, avg);
1012         } else if (
1013                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1014                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_DTLB |
1015                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1016                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1017                         runtime_dtlb_cache_stats[cpu].n != 0) {
1018                 print_dtlb_cache_misses(cpu, evsel, avg);
1019         } else if (
1020                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1021                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_ITLB |
1022                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1023                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1024                         runtime_itlb_cache_stats[cpu].n != 0) {
1025                 print_itlb_cache_misses(cpu, evsel, avg);
1026         } else if (
1027                 evsel->attr.type == PERF_TYPE_HW_CACHE &&
1028                 evsel->attr.config ==  ( PERF_COUNT_HW_CACHE_LL |
1029                                         ((PERF_COUNT_HW_CACHE_OP_READ) << 8) |
1030                                         ((PERF_COUNT_HW_CACHE_RESULT_MISS) << 16)) &&
1031                         runtime_ll_cache_stats[cpu].n != 0) {
1032                 print_ll_cache_misses(cpu, evsel, avg);
1033         } else if (perf_evsel__match(evsel, HARDWARE, HW_CACHE_MISSES) &&
1034                         runtime_cacherefs_stats[cpu].n != 0) {
1035                 total = avg_stats(&runtime_cacherefs_stats[cpu]);
1036
1037                 if (total)
1038                         ratio = avg * 100 / total;
1039
1040                 fprintf(output, " # %8.3f %% of all cache refs    ", ratio);
1041
1042         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_FRONTEND)) {
1043                 print_stalled_cycles_frontend(cpu, evsel, avg);
1044         } else if (perf_evsel__match(evsel, HARDWARE, HW_STALLED_CYCLES_BACKEND)) {
1045                 print_stalled_cycles_backend(cpu, evsel, avg);
1046         } else if (perf_evsel__match(evsel, HARDWARE, HW_CPU_CYCLES)) {
1047                 total = avg_stats(&runtime_nsecs_stats[cpu]);
1048
1049                 if (total) {
1050                         ratio = avg / total;
1051                         fprintf(output, " # %8.3f GHz                    ", ratio);
1052                 }
1053         } else if (transaction_run &&
1054                    perf_evsel__cmp(evsel, nth_evsel(T_CYCLES_IN_TX))) {
1055                 total = avg_stats(&runtime_cycles_stats[cpu]);
1056                 if (total)
1057                         fprintf(output,
1058                                 " #   %5.2f%% transactional cycles   ",
1059                                 100.0 * (avg / total));
1060         } else if (transaction_run &&
1061                    perf_evsel__cmp(evsel, nth_evsel(T_CYCLES_IN_TX_CP))) {
1062                 total = avg_stats(&runtime_cycles_stats[cpu]);
1063                 total2 = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
1064                 if (total2 < avg)
1065                         total2 = avg;
1066                 if (total)
1067                         fprintf(output,
1068                                 " #   %5.2f%% aborted cycles         ",
1069                                 100.0 * ((total2-avg) / total));
1070         } else if (transaction_run &&
1071                    perf_evsel__cmp(evsel, nth_evsel(T_TRANSACTION_START)) &&
1072                    avg > 0 &&
1073                    runtime_cycles_in_tx_stats[cpu].n != 0) {
1074                 total = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
1075
1076                 if (total)
1077                         ratio = total / avg;
1078
1079                 fprintf(output, " # %8.0f cycles / transaction   ", ratio);
1080         } else if (transaction_run &&
1081                    perf_evsel__cmp(evsel, nth_evsel(T_ELISION_START)) &&
1082                    avg > 0 &&
1083                    runtime_cycles_in_tx_stats[cpu].n != 0) {
1084                 total = avg_stats(&runtime_cycles_in_tx_stats[cpu]);
1085
1086                 if (total)
1087                         ratio = total / avg;
1088
1089                 fprintf(output, " # %8.0f cycles / elision       ", ratio);
1090         } else if (runtime_nsecs_stats[cpu].n != 0) {
1091                 char unit = 'M';
1092
1093                 total = avg_stats(&runtime_nsecs_stats[cpu]);
1094
1095                 if (total)
1096                         ratio = 1000.0 * avg / total;
1097                 if (ratio < 0.001) {
1098                         ratio *= 1000;
1099                         unit = 'K';
1100                 }
1101
1102                 fprintf(output, " # %8.3f %c/sec                  ", ratio, unit);
1103         } else {
1104                 fprintf(output, "                                   ");
1105         }
1106 }
1107
1108 static void print_aggr(char *prefix)
1109 {
1110         struct perf_evsel *counter;
1111         int cpu, cpu2, s, s2, id, nr;
1112         double uval;
1113         u64 ena, run, val;
1114
1115         if (!(aggr_map || aggr_get_id))
1116                 return;
1117
1118         for (s = 0; s < aggr_map->nr; s++) {
1119                 id = aggr_map->map[s];
1120                 evlist__for_each(evsel_list, counter) {
1121                         val = ena = run = 0;
1122                         nr = 0;
1123                         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1124                                 cpu2 = perf_evsel__cpus(counter)->map[cpu];
1125                                 s2 = aggr_get_id(evsel_list->cpus, cpu2);
1126                                 if (s2 != id)
1127                                         continue;
1128                                 val += counter->counts->cpu[cpu].val;
1129                                 ena += counter->counts->cpu[cpu].ena;
1130                                 run += counter->counts->cpu[cpu].run;
1131                                 nr++;
1132                         }
1133                         if (prefix)
1134                                 fprintf(output, "%s", prefix);
1135
1136                         if (run == 0 || ena == 0) {
1137                                 aggr_printout(counter, id, nr);
1138
1139                                 fprintf(output, "%*s%s",
1140                                         csv_output ? 0 : 18,
1141                                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1142                                         csv_sep);
1143
1144                                 fprintf(output, "%-*s%s",
1145                                         csv_output ? 0 : unit_width,
1146                                         counter->unit, csv_sep);
1147
1148                                 fprintf(output, "%*s",
1149                                         csv_output ? 0 : -25,
1150                                         perf_evsel__name(counter));
1151
1152                                 if (counter->cgrp)
1153                                         fprintf(output, "%s%s",
1154                                                 csv_sep, counter->cgrp->name);
1155
1156                                 fputc('\n', output);
1157                                 continue;
1158                         }
1159                         uval = val * counter->scale;
1160
1161                         if (nsec_counter(counter))
1162                                 nsec_printout(id, nr, counter, uval);
1163                         else
1164                                 abs_printout(id, nr, counter, uval);
1165
1166                         if (!csv_output) {
1167                                 print_noise(counter, 1.0);
1168
1169                                 if (run != ena)
1170                                         fprintf(output, "  (%.2f%%)",
1171                                                 100.0 * run / ena);
1172                         }
1173                         fputc('\n', output);
1174                 }
1175         }
1176 }
1177
1178 /*
1179  * Print out the results of a single counter:
1180  * aggregated counts in system-wide mode
1181  */
1182 static void print_counter_aggr(struct perf_evsel *counter, char *prefix)
1183 {
1184         struct perf_stat *ps = counter->priv;
1185         double avg = avg_stats(&ps->res_stats[0]);
1186         int scaled = counter->counts->scaled;
1187         double uval;
1188
1189         if (prefix)
1190                 fprintf(output, "%s", prefix);
1191
1192         if (scaled == -1) {
1193                 fprintf(output, "%*s%s",
1194                         csv_output ? 0 : 18,
1195                         counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1196                         csv_sep);
1197                 fprintf(output, "%-*s%s",
1198                         csv_output ? 0 : unit_width,
1199                         counter->unit, csv_sep);
1200                 fprintf(output, "%*s",
1201                         csv_output ? 0 : -25,
1202                         perf_evsel__name(counter));
1203
1204                 if (counter->cgrp)
1205                         fprintf(output, "%s%s", csv_sep, counter->cgrp->name);
1206
1207                 fputc('\n', output);
1208                 return;
1209         }
1210
1211         uval = avg * counter->scale;
1212
1213         if (nsec_counter(counter))
1214                 nsec_printout(-1, 0, counter, uval);
1215         else
1216                 abs_printout(-1, 0, counter, uval);
1217
1218         print_noise(counter, avg);
1219
1220         if (csv_output) {
1221                 fputc('\n', output);
1222                 return;
1223         }
1224
1225         if (scaled) {
1226                 double avg_enabled, avg_running;
1227
1228                 avg_enabled = avg_stats(&ps->res_stats[1]);
1229                 avg_running = avg_stats(&ps->res_stats[2]);
1230
1231                 fprintf(output, " [%5.2f%%]", 100 * avg_running / avg_enabled);
1232         }
1233         fprintf(output, "\n");
1234 }
1235
1236 /*
1237  * Print out the results of a single counter:
1238  * does not use aggregated count in system-wide
1239  */
1240 static void print_counter(struct perf_evsel *counter, char *prefix)
1241 {
1242         u64 ena, run, val;
1243         double uval;
1244         int cpu;
1245
1246         for (cpu = 0; cpu < perf_evsel__nr_cpus(counter); cpu++) {
1247                 val = counter->counts->cpu[cpu].val;
1248                 ena = counter->counts->cpu[cpu].ena;
1249                 run = counter->counts->cpu[cpu].run;
1250
1251                 if (prefix)
1252                         fprintf(output, "%s", prefix);
1253
1254                 if (run == 0 || ena == 0) {
1255                         fprintf(output, "CPU%*d%s%*s%s",
1256                                 csv_output ? 0 : -4,
1257                                 perf_evsel__cpus(counter)->map[cpu], csv_sep,
1258                                 csv_output ? 0 : 18,
1259                                 counter->supported ? CNTR_NOT_COUNTED : CNTR_NOT_SUPPORTED,
1260                                 csv_sep);
1261
1262                                 fprintf(output, "%-*s%s",
1263                                         csv_output ? 0 : unit_width,
1264                                         counter->unit, csv_sep);
1265
1266                                 fprintf(output, "%*s",
1267                                         csv_output ? 0 : -25,
1268                                         perf_evsel__name(counter));
1269
1270                         if (counter->cgrp)
1271                                 fprintf(output, "%s%s",
1272                                         csv_sep, counter->cgrp->name);
1273
1274                         fputc('\n', output);
1275                         continue;
1276                 }
1277
1278                 uval = val * counter->scale;
1279
1280                 if (nsec_counter(counter))
1281                         nsec_printout(cpu, 0, counter, uval);
1282                 else
1283                         abs_printout(cpu, 0, counter, uval);
1284
1285                 if (!csv_output) {
1286                         print_noise(counter, 1.0);
1287
1288                         if (run != ena)
1289                                 fprintf(output, "  (%.2f%%)",
1290                                         100.0 * run / ena);
1291                 }
1292                 fputc('\n', output);
1293         }
1294 }
1295
1296 static void print_stat(int argc, const char **argv)
1297 {
1298         struct perf_evsel *counter;
1299         int i;
1300
1301         fflush(stdout);
1302
1303         if (!csv_output) {
1304                 fprintf(output, "\n");
1305                 fprintf(output, " Performance counter stats for ");
1306                 if (target.system_wide)
1307                         fprintf(output, "\'system wide");
1308                 else if (target.cpu_list)
1309                         fprintf(output, "\'CPU(s) %s", target.cpu_list);
1310                 else if (!target__has_task(&target)) {
1311                         fprintf(output, "\'%s", argv[0]);
1312                         for (i = 1; i < argc; i++)
1313                                 fprintf(output, " %s", argv[i]);
1314                 } else if (target.pid)
1315                         fprintf(output, "process id \'%s", target.pid);
1316                 else
1317                         fprintf(output, "thread id \'%s", target.tid);
1318
1319                 fprintf(output, "\'");
1320                 if (run_count > 1)
1321                         fprintf(output, " (%d runs)", run_count);
1322                 fprintf(output, ":\n\n");
1323         }
1324
1325         switch (aggr_mode) {
1326         case AGGR_CORE:
1327         case AGGR_SOCKET:
1328                 print_aggr(NULL);
1329                 break;
1330         case AGGR_GLOBAL:
1331                 evlist__for_each(evsel_list, counter)
1332                         print_counter_aggr(counter, NULL);
1333                 break;
1334         case AGGR_NONE:
1335                 evlist__for_each(evsel_list, counter)
1336                         print_counter(counter, NULL);
1337                 break;
1338         default:
1339                 break;
1340         }
1341
1342         if (!csv_output) {
1343                 if (!null_run)
1344                         fprintf(output, "\n");
1345                 fprintf(output, " %17.9f seconds time elapsed",
1346                                 avg_stats(&walltime_nsecs_stats)/1e9);
1347                 if (run_count > 1) {
1348                         fprintf(output, "                                        ");
1349                         print_noise_pct(stddev_stats(&walltime_nsecs_stats),
1350                                         avg_stats(&walltime_nsecs_stats));
1351                 }
1352                 fprintf(output, "\n\n");
1353         }
1354 }
1355
1356 static volatile int signr = -1;
1357
1358 static void skip_signal(int signo)
1359 {
1360         if ((child_pid == -1) || interval)
1361                 done = 1;
1362
1363         signr = signo;
1364         /*
1365          * render child_pid harmless
1366          * won't send SIGTERM to a random
1367          * process in case of race condition
1368          * and fast PID recycling
1369          */
1370         child_pid = -1;
1371 }
1372
1373 static void sig_atexit(void)
1374 {
1375         sigset_t set, oset;
1376
1377         /*
1378          * avoid race condition with SIGCHLD handler
1379          * in skip_signal() which is modifying child_pid
1380          * goal is to avoid send SIGTERM to a random
1381          * process
1382          */
1383         sigemptyset(&set);
1384         sigaddset(&set, SIGCHLD);
1385         sigprocmask(SIG_BLOCK, &set, &oset);
1386
1387         if (child_pid != -1)
1388                 kill(child_pid, SIGTERM);
1389
1390         sigprocmask(SIG_SETMASK, &oset, NULL);
1391
1392         if (signr == -1)
1393                 return;
1394
1395         signal(signr, SIG_DFL);
1396         kill(getpid(), signr);
1397 }
1398
1399 static int stat__set_big_num(const struct option *opt __maybe_unused,
1400                              const char *s __maybe_unused, int unset)
1401 {
1402         big_num_opt = unset ? 0 : 1;
1403         return 0;
1404 }
1405
1406 static int perf_stat_init_aggr_mode(void)
1407 {
1408         switch (aggr_mode) {
1409         case AGGR_SOCKET:
1410                 if (cpu_map__build_socket_map(evsel_list->cpus, &aggr_map)) {
1411                         perror("cannot build socket map");
1412                         return -1;
1413                 }
1414                 aggr_get_id = cpu_map__get_socket;
1415                 break;
1416         case AGGR_CORE:
1417                 if (cpu_map__build_core_map(evsel_list->cpus, &aggr_map)) {
1418                         perror("cannot build core map");
1419                         return -1;
1420                 }
1421                 aggr_get_id = cpu_map__get_core;
1422                 break;
1423         case AGGR_NONE:
1424         case AGGR_GLOBAL:
1425         default:
1426                 break;
1427         }
1428         return 0;
1429 }
1430
1431 static int setup_events(const char * const *attrs, unsigned len)
1432 {
1433         unsigned i;
1434
1435         for (i = 0; i < len; i++) {
1436                 if (parse_events(evsel_list, attrs[i]))
1437                         return -1;
1438         }
1439         return 0;
1440 }
1441
1442 /*
1443  * Add default attributes, if there were no attributes specified or
1444  * if -d/--detailed, -d -d or -d -d -d is used:
1445  */
1446 static int add_default_attributes(void)
1447 {
1448         struct perf_event_attr default_attrs[] = {
1449
1450   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK              },
1451   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES        },
1452   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS          },
1453   { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS             },
1454
1455   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES              },
1456   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND },
1457   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND  },
1458   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS            },
1459   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS     },
1460   { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES           },
1461
1462 };
1463
1464 /*
1465  * Detailed stats (-d), covering the L1 and last level data caches:
1466  */
1467         struct perf_event_attr detailed_attrs[] = {
1468
1469   { .type = PERF_TYPE_HW_CACHE,
1470     .config =
1471          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1472         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1473         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1474
1475   { .type = PERF_TYPE_HW_CACHE,
1476     .config =
1477          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1478         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1479         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1480
1481   { .type = PERF_TYPE_HW_CACHE,
1482     .config =
1483          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1484         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1485         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1486
1487   { .type = PERF_TYPE_HW_CACHE,
1488     .config =
1489          PERF_COUNT_HW_CACHE_LL                 <<  0  |
1490         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1491         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1492 };
1493
1494 /*
1495  * Very detailed stats (-d -d), covering the instruction cache and the TLB caches:
1496  */
1497         struct perf_event_attr very_detailed_attrs[] = {
1498
1499   { .type = PERF_TYPE_HW_CACHE,
1500     .config =
1501          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1502         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1503         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1504
1505   { .type = PERF_TYPE_HW_CACHE,
1506     .config =
1507          PERF_COUNT_HW_CACHE_L1I                <<  0  |
1508         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1509         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1510
1511   { .type = PERF_TYPE_HW_CACHE,
1512     .config =
1513          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1514         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1515         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1516
1517   { .type = PERF_TYPE_HW_CACHE,
1518     .config =
1519          PERF_COUNT_HW_CACHE_DTLB               <<  0  |
1520         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1521         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1522
1523   { .type = PERF_TYPE_HW_CACHE,
1524     .config =
1525          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1526         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1527         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1528
1529   { .type = PERF_TYPE_HW_CACHE,
1530     .config =
1531          PERF_COUNT_HW_CACHE_ITLB               <<  0  |
1532         (PERF_COUNT_HW_CACHE_OP_READ            <<  8) |
1533         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1534
1535 };
1536
1537 /*
1538  * Very, very detailed stats (-d -d -d), adding prefetch events:
1539  */
1540         struct perf_event_attr very_very_detailed_attrs[] = {
1541
1542   { .type = PERF_TYPE_HW_CACHE,
1543     .config =
1544          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1545         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1546         (PERF_COUNT_HW_CACHE_RESULT_ACCESS      << 16)                          },
1547
1548   { .type = PERF_TYPE_HW_CACHE,
1549     .config =
1550          PERF_COUNT_HW_CACHE_L1D                <<  0  |
1551         (PERF_COUNT_HW_CACHE_OP_PREFETCH        <<  8) |
1552         (PERF_COUNT_HW_CACHE_RESULT_MISS        << 16)                          },
1553 };
1554
1555         /* Set attrs if no event is selected and !null_run: */
1556         if (null_run)
1557                 return 0;
1558
1559         if (transaction_run) {
1560                 int err;
1561                 if (pmu_have_event("cpu", "cycles-ct") &&
1562                     pmu_have_event("cpu", "el-start"))
1563                         err = setup_events(transaction_attrs,
1564                                         ARRAY_SIZE(transaction_attrs));
1565                 else
1566                         err = setup_events(transaction_limited_attrs,
1567                                  ARRAY_SIZE(transaction_limited_attrs));
1568                 if (err < 0) {
1569                         fprintf(stderr, "Cannot set up transaction events\n");
1570                         return -1;
1571                 }
1572                 return 0;
1573         }
1574
1575         if (!evsel_list->nr_entries) {
1576                 if (perf_evlist__add_default_attrs(evsel_list, default_attrs) < 0)
1577                         return -1;
1578         }
1579
1580         /* Detailed events get appended to the event list: */
1581
1582         if (detailed_run <  1)
1583                 return 0;
1584
1585         /* Append detailed run extra attributes: */
1586         if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0)
1587                 return -1;
1588
1589         if (detailed_run < 2)
1590                 return 0;
1591
1592         /* Append very detailed run extra attributes: */
1593         if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0)
1594                 return -1;
1595
1596         if (detailed_run < 3)
1597                 return 0;
1598
1599         /* Append very, very detailed run extra attributes: */
1600         return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs);
1601 }
1602
1603 int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
1604 {
1605         bool append_file = false;
1606         int output_fd = 0;
1607         const char *output_name = NULL;
1608         const struct option options[] = {
1609         OPT_BOOLEAN('T', "transaction", &transaction_run,
1610                     "hardware transaction statistics"),
1611         OPT_CALLBACK('e', "event", &evsel_list, "event",
1612                      "event selector. use 'perf list' to list available events",
1613                      parse_events_option),
1614         OPT_CALLBACK(0, "filter", &evsel_list, "filter",
1615                      "event filter", parse_filter),
1616         OPT_BOOLEAN('i', "no-inherit", &no_inherit,
1617                     "child tasks do not inherit counters"),
1618         OPT_STRING('p', "pid", &target.pid, "pid",
1619                    "stat events on existing process id"),
1620         OPT_STRING('t', "tid", &target.tid, "tid",
1621                    "stat events on existing thread id"),
1622         OPT_BOOLEAN('a', "all-cpus", &target.system_wide,
1623                     "system-wide collection from all CPUs"),
1624         OPT_BOOLEAN('g', "group", &group,
1625                     "put the counters into a counter group"),
1626         OPT_BOOLEAN('c', "scale", &scale, "scale/normalize counters"),
1627         OPT_INCR('v', "verbose", &verbose,
1628                     "be more verbose (show counter open errors, etc)"),
1629         OPT_INTEGER('r', "repeat", &run_count,
1630                     "repeat command and print average + stddev (max: 100, forever: 0)"),
1631         OPT_BOOLEAN('n', "null", &null_run,
1632                     "null run - dont start any counters"),
1633         OPT_INCR('d', "detailed", &detailed_run,
1634                     "detailed run - start a lot of events"),
1635         OPT_BOOLEAN('S', "sync", &sync_run,
1636                     "call sync() before starting a run"),
1637         OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL,
1638                            "print large numbers with thousands\' separators",
1639                            stat__set_big_num),
1640         OPT_STRING('C', "cpu", &target.cpu_list, "cpu",
1641                     "list of cpus to monitor in system-wide"),
1642         OPT_SET_UINT('A', "no-aggr", &aggr_mode,
1643                     "disable CPU count aggregation", AGGR_NONE),
1644         OPT_STRING('x', "field-separator", &csv_sep, "separator",
1645                    "print counts with custom separator"),
1646         OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
1647                      "monitor event in cgroup name only", parse_cgroups),
1648         OPT_STRING('o', "output", &output_name, "file", "output file name"),
1649         OPT_BOOLEAN(0, "append", &append_file, "append to the output file"),
1650         OPT_INTEGER(0, "log-fd", &output_fd,
1651                     "log output to fd, instead of stderr"),
1652         OPT_STRING(0, "pre", &pre_cmd, "command",
1653                         "command to run prior to the measured command"),
1654         OPT_STRING(0, "post", &post_cmd, "command",
1655                         "command to run after to the measured command"),
1656         OPT_UINTEGER('I', "interval-print", &interval,
1657                     "print counts at regular interval in ms (>= 100)"),
1658         OPT_SET_UINT(0, "per-socket", &aggr_mode,
1659                      "aggregate counts per processor socket", AGGR_SOCKET),
1660         OPT_SET_UINT(0, "per-core", &aggr_mode,
1661                      "aggregate counts per physical processor core", AGGR_CORE),
1662         OPT_UINTEGER('D', "delay", &initial_delay,
1663                      "ms to wait before starting measurement after program start"),
1664         OPT_END()
1665         };
1666         const char * const stat_usage[] = {
1667                 "perf stat [<options>] [<command>]",
1668                 NULL
1669         };
1670         int status = -EINVAL, run_idx;
1671         const char *mode;
1672
1673         setlocale(LC_ALL, "");
1674
1675         evsel_list = perf_evlist__new();
1676         if (evsel_list == NULL)
1677                 return -ENOMEM;
1678
1679         argc = parse_options(argc, argv, options, stat_usage,
1680                 PARSE_OPT_STOP_AT_NON_OPTION);
1681
1682         output = stderr;
1683         if (output_name && strcmp(output_name, "-"))
1684                 output = NULL;
1685
1686         if (output_name && output_fd) {
1687                 fprintf(stderr, "cannot use both --output and --log-fd\n");
1688                 parse_options_usage(stat_usage, options, "o", 1);
1689                 parse_options_usage(NULL, options, "log-fd", 0);
1690                 goto out;
1691         }
1692
1693         if (output_fd < 0) {
1694                 fprintf(stderr, "argument to --log-fd must be a > 0\n");
1695                 parse_options_usage(stat_usage, options, "log-fd", 0);
1696                 goto out;
1697         }
1698
1699         if (!output) {
1700                 struct timespec tm;
1701                 mode = append_file ? "a" : "w";
1702
1703                 output = fopen(output_name, mode);
1704                 if (!output) {
1705                         perror("failed to create output file");
1706                         return -1;
1707                 }
1708                 clock_gettime(CLOCK_REALTIME, &tm);
1709                 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec));
1710         } else if (output_fd > 0) {
1711                 mode = append_file ? "a" : "w";
1712                 output = fdopen(output_fd, mode);
1713                 if (!output) {
1714                         perror("Failed opening logfd");
1715                         return -errno;
1716                 }
1717         }
1718
1719         if (csv_sep) {
1720                 csv_output = true;
1721                 if (!strcmp(csv_sep, "\\t"))
1722                         csv_sep = "\t";
1723         } else
1724                 csv_sep = DEFAULT_SEPARATOR;
1725
1726         /*
1727          * let the spreadsheet do the pretty-printing
1728          */
1729         if (csv_output) {
1730                 /* User explicitly passed -B? */
1731                 if (big_num_opt == 1) {
1732                         fprintf(stderr, "-B option not supported with -x\n");
1733                         parse_options_usage(stat_usage, options, "B", 1);
1734                         parse_options_usage(NULL, options, "x", 1);
1735                         goto out;
1736                 } else /* Nope, so disable big number formatting */
1737                         big_num = false;
1738         } else if (big_num_opt == 0) /* User passed --no-big-num */
1739                 big_num = false;
1740
1741         if (!argc && target__none(&target))
1742                 usage_with_options(stat_usage, options);
1743
1744         if (run_count < 0) {
1745                 pr_err("Run count must be a positive number\n");
1746                 parse_options_usage(stat_usage, options, "r", 1);
1747                 goto out;
1748         } else if (run_count == 0) {
1749                 forever = true;
1750                 run_count = 1;
1751         }
1752
1753         /* no_aggr, cgroup are for system-wide only */
1754         if ((aggr_mode != AGGR_GLOBAL || 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, options, "G", 1);
1760                 parse_options_usage(NULL, options, "A", 1);
1761                 parse_options_usage(NULL, options, "a", 1);
1762                 goto out;
1763         }
1764
1765         if (add_default_attributes())
1766                 goto out;
1767
1768         target__validate(&target);
1769
1770         if (perf_evlist__create_maps(evsel_list, &target) < 0) {
1771                 if (target__has_task(&target)) {
1772                         pr_err("Problems finding threads of monitor\n");
1773                         parse_options_usage(stat_usage, options, "p", 1);
1774                         parse_options_usage(NULL, options, "t", 1);
1775                 } else if (target__has_cpu(&target)) {
1776                         perror("failed to parse CPUs map");
1777                         parse_options_usage(stat_usage, options, "C", 1);
1778                         parse_options_usage(NULL, options, "a", 1);
1779                 }
1780                 goto out;
1781         }
1782         if (interval && interval < 100) {
1783                 pr_err("print interval must be >= 100ms\n");
1784                 parse_options_usage(stat_usage, options, "I", 1);
1785                 goto out;
1786         }
1787
1788         if (perf_evlist__alloc_stats(evsel_list, interval))
1789                 goto out;
1790
1791         if (perf_stat_init_aggr_mode())
1792                 goto out;
1793
1794         /*
1795          * We dont want to block the signals - that would cause
1796          * child tasks to inherit that and Ctrl-C would not work.
1797          * What we want is for Ctrl-C to work in the exec()-ed
1798          * task, but being ignored by perf stat itself:
1799          */
1800         atexit(sig_atexit);
1801         if (!forever)
1802                 signal(SIGINT,  skip_signal);
1803         signal(SIGCHLD, skip_signal);
1804         signal(SIGALRM, skip_signal);
1805         signal(SIGABRT, skip_signal);
1806
1807         status = 0;
1808         for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
1809                 if (run_count != 1 && verbose)
1810                         fprintf(output, "[ perf stat: executing run #%d ... ]\n",
1811                                 run_idx + 1);
1812
1813                 status = run_perf_stat(argc, argv);
1814                 if (forever && status != -1) {
1815                         print_stat(argc, argv);
1816                         perf_stat__reset_stats(evsel_list);
1817                 }
1818         }
1819
1820         if (!forever && status != -1 && !interval)
1821                 print_stat(argc, argv);
1822
1823         perf_evlist__free_stats(evsel_list);
1824 out:
1825         perf_evlist__delete(evsel_list);
1826         return status;
1827 }