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