1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * builtin-stat.c 4 * 5 * Builtin stat command: Give a precise performance counters summary 6 * overview about any workload, CPU or specific PID. 7 * 8 * Sample output: 9 10 $ perf stat ./hackbench 10 11 12 Time: 0.118 13 14 Performance counter stats for './hackbench 10': 15 16 1708.761321 task-clock # 11.037 CPUs utilized 17 41,190 context-switches # 0.024 M/sec 18 6,735 CPU-migrations # 0.004 M/sec 19 17,318 page-faults # 0.010 M/sec 20 5,205,202,243 cycles # 3.046 GHz 21 3,856,436,920 stalled-cycles-frontend # 74.09% frontend cycles idle 22 1,600,790,871 stalled-cycles-backend # 30.75% backend cycles idle 23 2,603,501,247 instructions # 0.50 insns per cycle 24 # 1.48 stalled cycles per insn 25 484,357,498 branches # 283.455 M/sec 26 6,388,934 branch-misses # 1.32% of all branches 27 28 0.154822978 seconds time elapsed 29 30 * 31 * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com> 32 * 33 * Improvements and fixes by: 34 * 35 * Arjan van de Ven <arjan@linux.intel.com> 36 * Yanmin Zhang <yanmin.zhang@intel.com> 37 * Wu Fengguang <fengguang.wu@intel.com> 38 * Mike Galbraith <efault@gmx.de> 39 * Paul Mackerras <paulus@samba.org> 40 * Jaswinder Singh Rajput <jaswinder@kernel.org> 41 */ 42 43 #include "builtin.h" 44 #include "perf.h" 45 #include "util/cgroup.h" 46 #include <subcmd/parse-options.h> 47 #include "util/parse-events.h" 48 #include "util/pmu.h" 49 #include "util/event.h" 50 #include "util/evlist.h" 51 #include "util/evsel.h" 52 #include "util/debug.h" 53 #include "util/color.h" 54 #include "util/stat.h" 55 #include "util/header.h" 56 #include "util/cpumap.h" 57 #include "util/thread_map.h" 58 #include "util/counts.h" 59 #include "util/topdown.h" 60 #include "util/session.h" 61 #include "util/tool.h" 62 #include "util/string2.h" 63 #include "util/metricgroup.h" 64 #include "util/synthetic-events.h" 65 #include "util/target.h" 66 #include "util/time-utils.h" 67 #include "util/top.h" 68 #include "util/affinity.h" 69 #include "util/pfm.h" 70 #include "asm/bug.h" 71 72 #include <linux/time64.h> 73 #include <linux/zalloc.h> 74 #include <api/fs/fs.h> 75 #include <errno.h> 76 #include <signal.h> 77 #include <stdlib.h> 78 #include <sys/prctl.h> 79 #include <inttypes.h> 80 #include <locale.h> 81 #include <math.h> 82 #include <sys/types.h> 83 #include <sys/stat.h> 84 #include <sys/wait.h> 85 #include <unistd.h> 86 #include <sys/time.h> 87 #include <sys/resource.h> 88 #include <linux/err.h> 89 90 #include <linux/ctype.h> 91 #include <perf/evlist.h> 92 93 #define DEFAULT_SEPARATOR " " 94 #define FREEZE_ON_SMI_PATH "devices/cpu/freeze_on_smi" 95 96 static void print_counters(struct timespec *ts, int argc, const char **argv); 97 98 /* Default events used for perf stat -T */ 99 static const char *transaction_attrs = { 100 "task-clock," 101 "{" 102 "instructions," 103 "cycles," 104 "cpu/cycles-t/," 105 "cpu/tx-start/," 106 "cpu/el-start/," 107 "cpu/cycles-ct/" 108 "}" 109 }; 110 111 /* More limited version when the CPU does not have all events. */ 112 static const char * transaction_limited_attrs = { 113 "task-clock," 114 "{" 115 "instructions," 116 "cycles," 117 "cpu/cycles-t/," 118 "cpu/tx-start/" 119 "}" 120 }; 121 122 static const char * topdown_attrs[] = { 123 "topdown-total-slots", 124 "topdown-slots-retired", 125 "topdown-recovery-bubbles", 126 "topdown-fetch-bubbles", 127 "topdown-slots-issued", 128 NULL, 129 }; 130 131 static const char *topdown_metric_attrs[] = { 132 "slots", 133 "topdown-retiring", 134 "topdown-bad-spec", 135 "topdown-fe-bound", 136 "topdown-be-bound", 137 NULL, 138 }; 139 140 static const char *smi_cost_attrs = { 141 "{" 142 "msr/aperf/," 143 "msr/smi/," 144 "cycles" 145 "}" 146 }; 147 148 static struct evlist *evsel_list; 149 150 static struct target target = { 151 .uid = UINT_MAX, 152 }; 153 154 #define METRIC_ONLY_LEN 20 155 156 static volatile pid_t child_pid = -1; 157 static int detailed_run = 0; 158 static bool transaction_run; 159 static bool topdown_run = false; 160 static bool smi_cost = false; 161 static bool smi_reset = false; 162 static int big_num_opt = -1; 163 static bool group = false; 164 static const char *pre_cmd = NULL; 165 static const char *post_cmd = NULL; 166 static bool sync_run = false; 167 static bool forever = false; 168 static bool force_metric_only = false; 169 static struct timespec ref_time; 170 static bool append_file; 171 static bool interval_count; 172 static const char *output_name; 173 static int output_fd; 174 175 struct perf_stat { 176 bool record; 177 struct perf_data data; 178 struct perf_session *session; 179 u64 bytes_written; 180 struct perf_tool tool; 181 bool maps_allocated; 182 struct perf_cpu_map *cpus; 183 struct perf_thread_map *threads; 184 enum aggr_mode aggr_mode; 185 }; 186 187 static struct perf_stat perf_stat; 188 #define STAT_RECORD perf_stat.record 189 190 static volatile int done = 0; 191 192 static struct perf_stat_config stat_config = { 193 .aggr_mode = AGGR_GLOBAL, 194 .scale = true, 195 .unit_width = 4, /* strlen("unit") */ 196 .run_count = 1, 197 .metric_only_len = METRIC_ONLY_LEN, 198 .walltime_nsecs_stats = &walltime_nsecs_stats, 199 .big_num = true, 200 .ctl_fd = -1, 201 .ctl_fd_ack = -1 202 }; 203 204 static bool cpus_map_matched(struct evsel *a, struct evsel *b) 205 { 206 if (!a->core.cpus && !b->core.cpus) 207 return true; 208 209 if (!a->core.cpus || !b->core.cpus) 210 return false; 211 212 if (a->core.cpus->nr != b->core.cpus->nr) 213 return false; 214 215 for (int i = 0; i < a->core.cpus->nr; i++) { 216 if (a->core.cpus->map[i] != b->core.cpus->map[i]) 217 return false; 218 } 219 220 return true; 221 } 222 223 static void evlist__check_cpu_maps(struct evlist *evlist) 224 { 225 struct evsel *evsel, *pos, *leader; 226 char buf[1024]; 227 228 evlist__for_each_entry(evlist, evsel) { 229 leader = evsel->leader; 230 231 /* Check that leader matches cpus with each member. */ 232 if (leader == evsel) 233 continue; 234 if (cpus_map_matched(leader, evsel)) 235 continue; 236 237 /* If there's mismatch disable the group and warn user. */ 238 WARN_ONCE(1, "WARNING: grouped events cpus do not match, disabling group:\n"); 239 evsel__group_desc(leader, buf, sizeof(buf)); 240 pr_warning(" %s\n", buf); 241 242 if (verbose) { 243 cpu_map__snprint(leader->core.cpus, buf, sizeof(buf)); 244 pr_warning(" %s: %s\n", leader->name, buf); 245 cpu_map__snprint(evsel->core.cpus, buf, sizeof(buf)); 246 pr_warning(" %s: %s\n", evsel->name, buf); 247 } 248 249 for_each_group_evsel(pos, leader) { 250 pos->leader = pos; 251 pos->core.nr_members = 0; 252 } 253 evsel->leader->core.nr_members = 0; 254 } 255 } 256 257 static inline void diff_timespec(struct timespec *r, struct timespec *a, 258 struct timespec *b) 259 { 260 r->tv_sec = a->tv_sec - b->tv_sec; 261 if (a->tv_nsec < b->tv_nsec) { 262 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec; 263 r->tv_sec--; 264 } else { 265 r->tv_nsec = a->tv_nsec - b->tv_nsec ; 266 } 267 } 268 269 static void perf_stat__reset_stats(void) 270 { 271 int i; 272 273 evlist__reset_stats(evsel_list); 274 perf_stat__reset_shadow_stats(); 275 276 for (i = 0; i < stat_config.stats_num; i++) 277 perf_stat__reset_shadow_per_stat(&stat_config.stats[i]); 278 } 279 280 static int process_synthesized_event(struct perf_tool *tool __maybe_unused, 281 union perf_event *event, 282 struct perf_sample *sample __maybe_unused, 283 struct machine *machine __maybe_unused) 284 { 285 if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) { 286 pr_err("failed to write perf data, error: %m\n"); 287 return -1; 288 } 289 290 perf_stat.bytes_written += event->header.size; 291 return 0; 292 } 293 294 static int write_stat_round_event(u64 tm, u64 type) 295 { 296 return perf_event__synthesize_stat_round(NULL, tm, type, 297 process_synthesized_event, 298 NULL); 299 } 300 301 #define WRITE_STAT_ROUND_EVENT(time, interval) \ 302 write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval) 303 304 #define SID(e, x, y) xyarray__entry(e->core.sample_id, x, y) 305 306 static int evsel__write_stat_event(struct evsel *counter, u32 cpu, u32 thread, 307 struct perf_counts_values *count) 308 { 309 struct perf_sample_id *sid = SID(counter, cpu, thread); 310 311 return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count, 312 process_synthesized_event, NULL); 313 } 314 315 static int read_single_counter(struct evsel *counter, int cpu, 316 int thread, struct timespec *rs) 317 { 318 if (counter->tool_event == PERF_TOOL_DURATION_TIME) { 319 u64 val = rs->tv_nsec + rs->tv_sec*1000000000ULL; 320 struct perf_counts_values *count = 321 perf_counts(counter->counts, cpu, thread); 322 count->ena = count->run = val; 323 count->val = val; 324 return 0; 325 } 326 return evsel__read_counter(counter, cpu, thread); 327 } 328 329 /* 330 * Read out the results of a single counter: 331 * do not aggregate counts across CPUs in system-wide mode 332 */ 333 static int read_counter_cpu(struct evsel *counter, struct timespec *rs, int cpu) 334 { 335 int nthreads = perf_thread_map__nr(evsel_list->core.threads); 336 int thread; 337 338 if (!counter->supported) 339 return -ENOENT; 340 341 if (counter->core.system_wide) 342 nthreads = 1; 343 344 for (thread = 0; thread < nthreads; thread++) { 345 struct perf_counts_values *count; 346 347 count = perf_counts(counter->counts, cpu, thread); 348 349 /* 350 * The leader's group read loads data into its group members 351 * (via evsel__read_counter()) and sets their count->loaded. 352 */ 353 if (!perf_counts__is_loaded(counter->counts, cpu, thread) && 354 read_single_counter(counter, cpu, thread, rs)) { 355 counter->counts->scaled = -1; 356 perf_counts(counter->counts, cpu, thread)->ena = 0; 357 perf_counts(counter->counts, cpu, thread)->run = 0; 358 return -1; 359 } 360 361 perf_counts__set_loaded(counter->counts, cpu, thread, false); 362 363 if (STAT_RECORD) { 364 if (evsel__write_stat_event(counter, cpu, thread, count)) { 365 pr_err("failed to write stat event\n"); 366 return -1; 367 } 368 } 369 370 if (verbose > 1) { 371 fprintf(stat_config.output, 372 "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n", 373 evsel__name(counter), 374 cpu, 375 count->val, count->ena, count->run); 376 } 377 } 378 379 return 0; 380 } 381 382 static int read_affinity_counters(struct timespec *rs) 383 { 384 struct evsel *counter; 385 struct affinity affinity; 386 int i, ncpus, cpu; 387 388 if (affinity__setup(&affinity) < 0) 389 return -1; 390 391 ncpus = perf_cpu_map__nr(evsel_list->core.all_cpus); 392 if (!target__has_cpu(&target) || target__has_per_thread(&target)) 393 ncpus = 1; 394 evlist__for_each_cpu(evsel_list, i, cpu) { 395 if (i >= ncpus) 396 break; 397 affinity__set(&affinity, cpu); 398 399 evlist__for_each_entry(evsel_list, counter) { 400 if (evsel__cpu_iter_skip(counter, cpu)) 401 continue; 402 if (!counter->err) { 403 counter->err = read_counter_cpu(counter, rs, 404 counter->cpu_iter - 1); 405 } 406 } 407 } 408 affinity__cleanup(&affinity); 409 return 0; 410 } 411 412 static void read_counters(struct timespec *rs) 413 { 414 struct evsel *counter; 415 416 if (!stat_config.stop_read_counter && (read_affinity_counters(rs) < 0)) 417 return; 418 419 evlist__for_each_entry(evsel_list, counter) { 420 if (counter->err) 421 pr_debug("failed to read counter %s\n", counter->name); 422 if (counter->err == 0 && perf_stat_process_counter(&stat_config, counter)) 423 pr_warning("failed to process counter %s\n", counter->name); 424 counter->err = 0; 425 } 426 } 427 428 static int runtime_stat_new(struct perf_stat_config *config, int nthreads) 429 { 430 int i; 431 432 config->stats = calloc(nthreads, sizeof(struct runtime_stat)); 433 if (!config->stats) 434 return -1; 435 436 config->stats_num = nthreads; 437 438 for (i = 0; i < nthreads; i++) 439 runtime_stat__init(&config->stats[i]); 440 441 return 0; 442 } 443 444 static void runtime_stat_delete(struct perf_stat_config *config) 445 { 446 int i; 447 448 if (!config->stats) 449 return; 450 451 for (i = 0; i < config->stats_num; i++) 452 runtime_stat__exit(&config->stats[i]); 453 454 zfree(&config->stats); 455 } 456 457 static void runtime_stat_reset(struct perf_stat_config *config) 458 { 459 int i; 460 461 if (!config->stats) 462 return; 463 464 for (i = 0; i < config->stats_num; i++) 465 perf_stat__reset_shadow_per_stat(&config->stats[i]); 466 } 467 468 static void process_interval(void) 469 { 470 struct timespec ts, rs; 471 472 clock_gettime(CLOCK_MONOTONIC, &ts); 473 diff_timespec(&rs, &ts, &ref_time); 474 475 perf_stat__reset_shadow_per_stat(&rt_stat); 476 runtime_stat_reset(&stat_config); 477 read_counters(&rs); 478 479 if (STAT_RECORD) { 480 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL)) 481 pr_err("failed to write stat round event\n"); 482 } 483 484 init_stats(&walltime_nsecs_stats); 485 update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000ULL); 486 print_counters(&rs, 0, NULL); 487 } 488 489 static bool handle_interval(unsigned int interval, int *times) 490 { 491 if (interval) { 492 process_interval(); 493 if (interval_count && !(--(*times))) 494 return true; 495 } 496 return false; 497 } 498 499 static void enable_counters(void) 500 { 501 if (stat_config.initial_delay < 0) { 502 pr_info(EVLIST_DISABLED_MSG); 503 return; 504 } 505 506 if (stat_config.initial_delay > 0) { 507 pr_info(EVLIST_DISABLED_MSG); 508 usleep(stat_config.initial_delay * USEC_PER_MSEC); 509 } 510 511 /* 512 * We need to enable counters only if: 513 * - we don't have tracee (attaching to task or cpu) 514 * - we have initial delay configured 515 */ 516 if (!target__none(&target) || stat_config.initial_delay) { 517 evlist__enable(evsel_list); 518 if (stat_config.initial_delay > 0) 519 pr_info(EVLIST_ENABLED_MSG); 520 } 521 } 522 523 static void disable_counters(void) 524 { 525 /* 526 * If we don't have tracee (attaching to task or cpu), counters may 527 * still be running. To get accurate group ratios, we must stop groups 528 * from counting before reading their constituent counters. 529 */ 530 if (!target__none(&target)) 531 evlist__disable(evsel_list); 532 } 533 534 static volatile int workload_exec_errno; 535 536 /* 537 * evlist__prepare_workload will send a SIGUSR1 538 * if the fork fails, since we asked by setting its 539 * want_signal to true. 540 */ 541 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info, 542 void *ucontext __maybe_unused) 543 { 544 workload_exec_errno = info->si_value.sival_int; 545 } 546 547 static bool evsel__should_store_id(struct evsel *counter) 548 { 549 return STAT_RECORD || counter->core.attr.read_format & PERF_FORMAT_ID; 550 } 551 552 static bool is_target_alive(struct target *_target, 553 struct perf_thread_map *threads) 554 { 555 struct stat st; 556 int i; 557 558 if (!target__has_task(_target)) 559 return true; 560 561 for (i = 0; i < threads->nr; i++) { 562 char path[PATH_MAX]; 563 564 scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(), 565 threads->map[i].pid); 566 567 if (!stat(path, &st)) 568 return true; 569 } 570 571 return false; 572 } 573 574 static void process_evlist(struct evlist *evlist, unsigned int interval) 575 { 576 enum evlist_ctl_cmd cmd = EVLIST_CTL_CMD_UNSUPPORTED; 577 578 if (evlist__ctlfd_process(evlist, &cmd) > 0) { 579 switch (cmd) { 580 case EVLIST_CTL_CMD_ENABLE: 581 pr_info(EVLIST_ENABLED_MSG); 582 if (interval) 583 process_interval(); 584 break; 585 case EVLIST_CTL_CMD_DISABLE: 586 if (interval) 587 process_interval(); 588 pr_info(EVLIST_DISABLED_MSG); 589 break; 590 case EVLIST_CTL_CMD_SNAPSHOT: 591 case EVLIST_CTL_CMD_ACK: 592 case EVLIST_CTL_CMD_UNSUPPORTED: 593 default: 594 break; 595 } 596 } 597 } 598 599 static void compute_tts(struct timespec *time_start, struct timespec *time_stop, 600 int *time_to_sleep) 601 { 602 int tts = *time_to_sleep; 603 struct timespec time_diff; 604 605 diff_timespec(&time_diff, time_stop, time_start); 606 607 tts -= time_diff.tv_sec * MSEC_PER_SEC + 608 time_diff.tv_nsec / NSEC_PER_MSEC; 609 610 if (tts < 0) 611 tts = 0; 612 613 *time_to_sleep = tts; 614 } 615 616 static int dispatch_events(bool forks, int timeout, int interval, int *times) 617 { 618 int child_exited = 0, status = 0; 619 int time_to_sleep, sleep_time; 620 struct timespec time_start, time_stop; 621 622 if (interval) 623 sleep_time = interval; 624 else if (timeout) 625 sleep_time = timeout; 626 else 627 sleep_time = 1000; 628 629 time_to_sleep = sleep_time; 630 631 while (!done) { 632 if (forks) 633 child_exited = waitpid(child_pid, &status, WNOHANG); 634 else 635 child_exited = !is_target_alive(&target, evsel_list->core.threads) ? 1 : 0; 636 637 if (child_exited) 638 break; 639 640 clock_gettime(CLOCK_MONOTONIC, &time_start); 641 if (!(evlist__poll(evsel_list, time_to_sleep) > 0)) { /* poll timeout or EINTR */ 642 if (timeout || handle_interval(interval, times)) 643 break; 644 time_to_sleep = sleep_time; 645 } else { /* fd revent */ 646 process_evlist(evsel_list, interval); 647 clock_gettime(CLOCK_MONOTONIC, &time_stop); 648 compute_tts(&time_start, &time_stop, &time_to_sleep); 649 } 650 } 651 652 return status; 653 } 654 655 enum counter_recovery { 656 COUNTER_SKIP, 657 COUNTER_RETRY, 658 COUNTER_FATAL, 659 }; 660 661 static enum counter_recovery stat_handle_error(struct evsel *counter) 662 { 663 char msg[BUFSIZ]; 664 /* 665 * PPC returns ENXIO for HW counters until 2.6.37 666 * (behavior changed with commit b0a873e). 667 */ 668 if (errno == EINVAL || errno == ENOSYS || 669 errno == ENOENT || errno == EOPNOTSUPP || 670 errno == ENXIO) { 671 if (verbose > 0) 672 ui__warning("%s event is not supported by the kernel.\n", 673 evsel__name(counter)); 674 counter->supported = false; 675 /* 676 * errored is a sticky flag that means one of the counter's 677 * cpu event had a problem and needs to be reexamined. 678 */ 679 counter->errored = true; 680 681 if ((counter->leader != counter) || 682 !(counter->leader->core.nr_members > 1)) 683 return COUNTER_SKIP; 684 } else if (evsel__fallback(counter, errno, msg, sizeof(msg))) { 685 if (verbose > 0) 686 ui__warning("%s\n", msg); 687 return COUNTER_RETRY; 688 } else if (target__has_per_thread(&target) && 689 evsel_list->core.threads && 690 evsel_list->core.threads->err_thread != -1) { 691 /* 692 * For global --per-thread case, skip current 693 * error thread. 694 */ 695 if (!thread_map__remove(evsel_list->core.threads, 696 evsel_list->core.threads->err_thread)) { 697 evsel_list->core.threads->err_thread = -1; 698 return COUNTER_RETRY; 699 } 700 } 701 702 evsel__open_strerror(counter, &target, errno, msg, sizeof(msg)); 703 ui__error("%s\n", msg); 704 705 if (child_pid != -1) 706 kill(child_pid, SIGTERM); 707 return COUNTER_FATAL; 708 } 709 710 static int __run_perf_stat(int argc, const char **argv, int run_idx) 711 { 712 int interval = stat_config.interval; 713 int times = stat_config.times; 714 int timeout = stat_config.timeout; 715 char msg[BUFSIZ]; 716 unsigned long long t0, t1; 717 struct evsel *counter; 718 size_t l; 719 int status = 0; 720 const bool forks = (argc > 0); 721 bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false; 722 struct affinity affinity; 723 int i, cpu; 724 bool second_pass = false; 725 726 if (forks) { 727 if (evlist__prepare_workload(evsel_list, &target, argv, is_pipe, workload_exec_failed_signal) < 0) { 728 perror("failed to prepare workload"); 729 return -1; 730 } 731 child_pid = evsel_list->workload.pid; 732 } 733 734 if (group) 735 evlist__set_leader(evsel_list); 736 737 if (affinity__setup(&affinity) < 0) 738 return -1; 739 740 evlist__for_each_cpu (evsel_list, i, cpu) { 741 affinity__set(&affinity, cpu); 742 743 evlist__for_each_entry(evsel_list, counter) { 744 if (evsel__cpu_iter_skip(counter, cpu)) 745 continue; 746 if (counter->reset_group || counter->errored) 747 continue; 748 try_again: 749 if (create_perf_stat_counter(counter, &stat_config, &target, 750 counter->cpu_iter - 1) < 0) { 751 752 /* 753 * Weak group failed. We cannot just undo this here 754 * because earlier CPUs might be in group mode, and the kernel 755 * doesn't support mixing group and non group reads. Defer 756 * it to later. 757 * Don't close here because we're in the wrong affinity. 758 */ 759 if ((errno == EINVAL || errno == EBADF) && 760 counter->leader != counter && 761 counter->weak_group) { 762 evlist__reset_weak_group(evsel_list, counter, false); 763 assert(counter->reset_group); 764 second_pass = true; 765 continue; 766 } 767 768 switch (stat_handle_error(counter)) { 769 case COUNTER_FATAL: 770 return -1; 771 case COUNTER_RETRY: 772 goto try_again; 773 case COUNTER_SKIP: 774 continue; 775 default: 776 break; 777 } 778 779 } 780 counter->supported = true; 781 } 782 } 783 784 if (second_pass) { 785 /* 786 * Now redo all the weak group after closing them, 787 * and also close errored counters. 788 */ 789 790 evlist__for_each_cpu(evsel_list, i, cpu) { 791 affinity__set(&affinity, cpu); 792 /* First close errored or weak retry */ 793 evlist__for_each_entry(evsel_list, counter) { 794 if (!counter->reset_group && !counter->errored) 795 continue; 796 if (evsel__cpu_iter_skip_no_inc(counter, cpu)) 797 continue; 798 perf_evsel__close_cpu(&counter->core, counter->cpu_iter); 799 } 800 /* Now reopen weak */ 801 evlist__for_each_entry(evsel_list, counter) { 802 if (!counter->reset_group && !counter->errored) 803 continue; 804 if (evsel__cpu_iter_skip(counter, cpu)) 805 continue; 806 if (!counter->reset_group) 807 continue; 808 try_again_reset: 809 pr_debug2("reopening weak %s\n", evsel__name(counter)); 810 if (create_perf_stat_counter(counter, &stat_config, &target, 811 counter->cpu_iter - 1) < 0) { 812 813 switch (stat_handle_error(counter)) { 814 case COUNTER_FATAL: 815 return -1; 816 case COUNTER_RETRY: 817 goto try_again_reset; 818 case COUNTER_SKIP: 819 continue; 820 default: 821 break; 822 } 823 } 824 counter->supported = true; 825 } 826 } 827 } 828 affinity__cleanup(&affinity); 829 830 evlist__for_each_entry(evsel_list, counter) { 831 if (!counter->supported) { 832 perf_evsel__free_fd(&counter->core); 833 continue; 834 } 835 836 l = strlen(counter->unit); 837 if (l > stat_config.unit_width) 838 stat_config.unit_width = l; 839 840 if (evsel__should_store_id(counter) && 841 evsel__store_ids(counter, evsel_list)) 842 return -1; 843 } 844 845 if (evlist__apply_filters(evsel_list, &counter)) { 846 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n", 847 counter->filter, evsel__name(counter), errno, 848 str_error_r(errno, msg, sizeof(msg))); 849 return -1; 850 } 851 852 if (STAT_RECORD) { 853 int err, fd = perf_data__fd(&perf_stat.data); 854 855 if (is_pipe) { 856 err = perf_header__write_pipe(perf_data__fd(&perf_stat.data)); 857 } else { 858 err = perf_session__write_header(perf_stat.session, evsel_list, 859 fd, false); 860 } 861 862 if (err < 0) 863 return err; 864 865 err = perf_event__synthesize_stat_events(&stat_config, NULL, evsel_list, 866 process_synthesized_event, is_pipe); 867 if (err < 0) 868 return err; 869 } 870 871 /* 872 * Enable counters and exec the command: 873 */ 874 t0 = rdclock(); 875 clock_gettime(CLOCK_MONOTONIC, &ref_time); 876 877 if (forks) { 878 evlist__start_workload(evsel_list); 879 enable_counters(); 880 881 if (interval || timeout || evlist__ctlfd_initialized(evsel_list)) 882 status = dispatch_events(forks, timeout, interval, ×); 883 if (child_pid != -1) { 884 if (timeout) 885 kill(child_pid, SIGTERM); 886 wait4(child_pid, &status, 0, &stat_config.ru_data); 887 } 888 889 if (workload_exec_errno) { 890 const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg)); 891 pr_err("Workload failed: %s\n", emsg); 892 return -1; 893 } 894 895 if (WIFSIGNALED(status)) 896 psignal(WTERMSIG(status), argv[0]); 897 } else { 898 enable_counters(); 899 status = dispatch_events(forks, timeout, interval, ×); 900 } 901 902 disable_counters(); 903 904 t1 = rdclock(); 905 906 if (stat_config.walltime_run_table) 907 stat_config.walltime_run[run_idx] = t1 - t0; 908 909 if (interval && stat_config.summary) { 910 stat_config.interval = 0; 911 stat_config.stop_read_counter = true; 912 init_stats(&walltime_nsecs_stats); 913 update_stats(&walltime_nsecs_stats, t1 - t0); 914 915 if (stat_config.aggr_mode == AGGR_GLOBAL) 916 evlist__save_aggr_prev_raw_counts(evsel_list); 917 918 evlist__copy_prev_raw_counts(evsel_list); 919 evlist__reset_prev_raw_counts(evsel_list); 920 runtime_stat_reset(&stat_config); 921 perf_stat__reset_shadow_per_stat(&rt_stat); 922 } else 923 update_stats(&walltime_nsecs_stats, t1 - t0); 924 925 /* 926 * Closing a group leader splits the group, and as we only disable 927 * group leaders, results in remaining events becoming enabled. To 928 * avoid arbitrary skew, we must read all counters before closing any 929 * group leaders. 930 */ 931 read_counters(&(struct timespec) { .tv_nsec = t1-t0 }); 932 933 /* 934 * We need to keep evsel_list alive, because it's processed 935 * later the evsel_list will be closed after. 936 */ 937 if (!STAT_RECORD) 938 evlist__close(evsel_list); 939 940 return WEXITSTATUS(status); 941 } 942 943 static int run_perf_stat(int argc, const char **argv, int run_idx) 944 { 945 int ret; 946 947 if (pre_cmd) { 948 ret = system(pre_cmd); 949 if (ret) 950 return ret; 951 } 952 953 if (sync_run) 954 sync(); 955 956 ret = __run_perf_stat(argc, argv, run_idx); 957 if (ret) 958 return ret; 959 960 if (post_cmd) { 961 ret = system(post_cmd); 962 if (ret) 963 return ret; 964 } 965 966 return ret; 967 } 968 969 static void print_counters(struct timespec *ts, int argc, const char **argv) 970 { 971 /* Do not print anything if we record to the pipe. */ 972 if (STAT_RECORD && perf_stat.data.is_pipe) 973 return; 974 if (stat_config.quiet) 975 return; 976 977 evlist__print_counters(evsel_list, &stat_config, &target, ts, argc, argv); 978 } 979 980 static volatile int signr = -1; 981 982 static void skip_signal(int signo) 983 { 984 if ((child_pid == -1) || stat_config.interval) 985 done = 1; 986 987 signr = signo; 988 /* 989 * render child_pid harmless 990 * won't send SIGTERM to a random 991 * process in case of race condition 992 * and fast PID recycling 993 */ 994 child_pid = -1; 995 } 996 997 static void sig_atexit(void) 998 { 999 sigset_t set, oset; 1000 1001 /* 1002 * avoid race condition with SIGCHLD handler 1003 * in skip_signal() which is modifying child_pid 1004 * goal is to avoid send SIGTERM to a random 1005 * process 1006 */ 1007 sigemptyset(&set); 1008 sigaddset(&set, SIGCHLD); 1009 sigprocmask(SIG_BLOCK, &set, &oset); 1010 1011 if (child_pid != -1) 1012 kill(child_pid, SIGTERM); 1013 1014 sigprocmask(SIG_SETMASK, &oset, NULL); 1015 1016 if (signr == -1) 1017 return; 1018 1019 signal(signr, SIG_DFL); 1020 kill(getpid(), signr); 1021 } 1022 1023 void perf_stat__set_big_num(int set) 1024 { 1025 stat_config.big_num = (set != 0); 1026 } 1027 1028 static int stat__set_big_num(const struct option *opt __maybe_unused, 1029 const char *s __maybe_unused, int unset) 1030 { 1031 big_num_opt = unset ? 0 : 1; 1032 perf_stat__set_big_num(!unset); 1033 return 0; 1034 } 1035 1036 static int enable_metric_only(const struct option *opt __maybe_unused, 1037 const char *s __maybe_unused, int unset) 1038 { 1039 force_metric_only = true; 1040 stat_config.metric_only = !unset; 1041 return 0; 1042 } 1043 1044 static int parse_metric_groups(const struct option *opt, 1045 const char *str, 1046 int unset __maybe_unused) 1047 { 1048 return metricgroup__parse_groups(opt, str, 1049 stat_config.metric_no_group, 1050 stat_config.metric_no_merge, 1051 &stat_config.metric_events); 1052 } 1053 1054 static int parse_control_option(const struct option *opt, 1055 const char *str, 1056 int unset __maybe_unused) 1057 { 1058 struct perf_stat_config *config = opt->value; 1059 1060 return evlist__parse_control(str, &config->ctl_fd, &config->ctl_fd_ack, &config->ctl_fd_close); 1061 } 1062 1063 static int parse_stat_cgroups(const struct option *opt, 1064 const char *str, int unset) 1065 { 1066 if (stat_config.cgroup_list) { 1067 pr_err("--cgroup and --for-each-cgroup cannot be used together\n"); 1068 return -1; 1069 } 1070 1071 return parse_cgroups(opt, str, unset); 1072 } 1073 1074 static struct option stat_options[] = { 1075 OPT_BOOLEAN('T', "transaction", &transaction_run, 1076 "hardware transaction statistics"), 1077 OPT_CALLBACK('e', "event", &evsel_list, "event", 1078 "event selector. use 'perf list' to list available events", 1079 parse_events_option), 1080 OPT_CALLBACK(0, "filter", &evsel_list, "filter", 1081 "event filter", parse_filter), 1082 OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit, 1083 "child tasks do not inherit counters"), 1084 OPT_STRING('p', "pid", &target.pid, "pid", 1085 "stat events on existing process id"), 1086 OPT_STRING('t', "tid", &target.tid, "tid", 1087 "stat events on existing thread id"), 1088 OPT_BOOLEAN('a', "all-cpus", &target.system_wide, 1089 "system-wide collection from all CPUs"), 1090 OPT_BOOLEAN('g', "group", &group, 1091 "put the counters into a counter group"), 1092 OPT_BOOLEAN(0, "scale", &stat_config.scale, 1093 "Use --no-scale to disable counter scaling for multiplexing"), 1094 OPT_INCR('v', "verbose", &verbose, 1095 "be more verbose (show counter open errors, etc)"), 1096 OPT_INTEGER('r', "repeat", &stat_config.run_count, 1097 "repeat command and print average + stddev (max: 100, forever: 0)"), 1098 OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table, 1099 "display details about each run (only with -r option)"), 1100 OPT_BOOLEAN('n', "null", &stat_config.null_run, 1101 "null run - dont start any counters"), 1102 OPT_INCR('d', "detailed", &detailed_run, 1103 "detailed run - start a lot of events"), 1104 OPT_BOOLEAN('S', "sync", &sync_run, 1105 "call sync() before starting a run"), 1106 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL, 1107 "print large numbers with thousands\' separators", 1108 stat__set_big_num), 1109 OPT_STRING('C', "cpu", &target.cpu_list, "cpu", 1110 "list of cpus to monitor in system-wide"), 1111 OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode, 1112 "disable CPU count aggregation", AGGR_NONE), 1113 OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"), 1114 OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator", 1115 "print counts with custom separator"), 1116 OPT_CALLBACK('G', "cgroup", &evsel_list, "name", 1117 "monitor event in cgroup name only", parse_stat_cgroups), 1118 OPT_STRING(0, "for-each-cgroup", &stat_config.cgroup_list, "name", 1119 "expand events for each cgroup"), 1120 OPT_STRING('o', "output", &output_name, "file", "output file name"), 1121 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"), 1122 OPT_INTEGER(0, "log-fd", &output_fd, 1123 "log output to fd, instead of stderr"), 1124 OPT_STRING(0, "pre", &pre_cmd, "command", 1125 "command to run prior to the measured command"), 1126 OPT_STRING(0, "post", &post_cmd, "command", 1127 "command to run after to the measured command"), 1128 OPT_UINTEGER('I', "interval-print", &stat_config.interval, 1129 "print counts at regular interval in ms " 1130 "(overhead is possible for values <= 100ms)"), 1131 OPT_INTEGER(0, "interval-count", &stat_config.times, 1132 "print counts for fixed number of times"), 1133 OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear, 1134 "clear screen in between new interval"), 1135 OPT_UINTEGER(0, "timeout", &stat_config.timeout, 1136 "stop workload and print counts after a timeout period in ms (>= 10ms)"), 1137 OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode, 1138 "aggregate counts per processor socket", AGGR_SOCKET), 1139 OPT_SET_UINT(0, "per-die", &stat_config.aggr_mode, 1140 "aggregate counts per processor die", AGGR_DIE), 1141 OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode, 1142 "aggregate counts per physical processor core", AGGR_CORE), 1143 OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode, 1144 "aggregate counts per thread", AGGR_THREAD), 1145 OPT_SET_UINT(0, "per-node", &stat_config.aggr_mode, 1146 "aggregate counts per numa node", AGGR_NODE), 1147 OPT_INTEGER('D', "delay", &stat_config.initial_delay, 1148 "ms to wait before starting measurement after program start (-1: start with events disabled)"), 1149 OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL, 1150 "Only print computed metrics. No raw values", enable_metric_only), 1151 OPT_BOOLEAN(0, "metric-no-group", &stat_config.metric_no_group, 1152 "don't group metric events, impacts multiplexing"), 1153 OPT_BOOLEAN(0, "metric-no-merge", &stat_config.metric_no_merge, 1154 "don't try to share events between metrics in a group"), 1155 OPT_BOOLEAN(0, "topdown", &topdown_run, 1156 "measure topdown level 1 statistics"), 1157 OPT_BOOLEAN(0, "smi-cost", &smi_cost, 1158 "measure SMI cost"), 1159 OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list", 1160 "monitor specified metrics or metric groups (separated by ,)", 1161 parse_metric_groups), 1162 OPT_BOOLEAN_FLAG(0, "all-kernel", &stat_config.all_kernel, 1163 "Configure all used events to run in kernel space.", 1164 PARSE_OPT_EXCLUSIVE), 1165 OPT_BOOLEAN_FLAG(0, "all-user", &stat_config.all_user, 1166 "Configure all used events to run in user space.", 1167 PARSE_OPT_EXCLUSIVE), 1168 OPT_BOOLEAN(0, "percore-show-thread", &stat_config.percore_show_thread, 1169 "Use with 'percore' event qualifier to show the event " 1170 "counts of one hardware thread by sum up total hardware " 1171 "threads of same physical core"), 1172 OPT_BOOLEAN(0, "summary", &stat_config.summary, 1173 "print summary for interval mode"), 1174 OPT_BOOLEAN(0, "quiet", &stat_config.quiet, 1175 "don't print output (useful with record)"), 1176 #ifdef HAVE_LIBPFM 1177 OPT_CALLBACK(0, "pfm-events", &evsel_list, "event", 1178 "libpfm4 event selector. use 'perf list' to list available events", 1179 parse_libpfm_events_option), 1180 #endif 1181 OPT_CALLBACK(0, "control", &stat_config, "fd:ctl-fd[,ack-fd] or fifo:ctl-fifo[,ack-fifo]", 1182 "Listen on ctl-fd descriptor for command to control measurement ('enable': enable events, 'disable': disable events).\n" 1183 "\t\t\t Optionally send control command completion ('ack\\n') to ack-fd descriptor.\n" 1184 "\t\t\t Alternatively, ctl-fifo / ack-fifo will be opened and used as ctl-fd / ack-fd.", 1185 parse_control_option), 1186 OPT_END() 1187 }; 1188 1189 static struct aggr_cpu_id perf_stat__get_socket(struct perf_stat_config *config __maybe_unused, 1190 struct perf_cpu_map *map, int cpu) 1191 { 1192 return cpu_map__get_socket(map, cpu, NULL); 1193 } 1194 1195 static struct aggr_cpu_id perf_stat__get_die(struct perf_stat_config *config __maybe_unused, 1196 struct perf_cpu_map *map, int cpu) 1197 { 1198 return cpu_map__get_die(map, cpu, NULL); 1199 } 1200 1201 static struct aggr_cpu_id perf_stat__get_core(struct perf_stat_config *config __maybe_unused, 1202 struct perf_cpu_map *map, int cpu) 1203 { 1204 return cpu_map__get_core(map, cpu, NULL); 1205 } 1206 1207 static struct aggr_cpu_id perf_stat__get_node(struct perf_stat_config *config __maybe_unused, 1208 struct perf_cpu_map *map, int cpu) 1209 { 1210 return cpu_map__get_node(map, cpu, NULL); 1211 } 1212 1213 static struct aggr_cpu_id perf_stat__get_aggr(struct perf_stat_config *config, 1214 aggr_get_id_t get_id, struct perf_cpu_map *map, int idx) 1215 { 1216 int cpu; 1217 struct aggr_cpu_id id = cpu_map__empty_aggr_cpu_id(); 1218 1219 if (idx >= map->nr) 1220 return id; 1221 1222 cpu = map->map[idx]; 1223 1224 if (cpu_map__aggr_cpu_id_is_empty(config->cpus_aggr_map->map[cpu])) 1225 config->cpus_aggr_map->map[cpu] = get_id(config, map, idx); 1226 1227 id = config->cpus_aggr_map->map[cpu]; 1228 return id; 1229 } 1230 1231 static struct aggr_cpu_id perf_stat__get_socket_cached(struct perf_stat_config *config, 1232 struct perf_cpu_map *map, int idx) 1233 { 1234 return perf_stat__get_aggr(config, perf_stat__get_socket, map, idx); 1235 } 1236 1237 static struct aggr_cpu_id perf_stat__get_die_cached(struct perf_stat_config *config, 1238 struct perf_cpu_map *map, int idx) 1239 { 1240 return perf_stat__get_aggr(config, perf_stat__get_die, map, idx); 1241 } 1242 1243 static struct aggr_cpu_id perf_stat__get_core_cached(struct perf_stat_config *config, 1244 struct perf_cpu_map *map, int idx) 1245 { 1246 return perf_stat__get_aggr(config, perf_stat__get_core, map, idx); 1247 } 1248 1249 static struct aggr_cpu_id perf_stat__get_node_cached(struct perf_stat_config *config, 1250 struct perf_cpu_map *map, int idx) 1251 { 1252 return perf_stat__get_aggr(config, perf_stat__get_node, map, idx); 1253 } 1254 1255 static bool term_percore_set(void) 1256 { 1257 struct evsel *counter; 1258 1259 evlist__for_each_entry(evsel_list, counter) { 1260 if (counter->percore) 1261 return true; 1262 } 1263 1264 return false; 1265 } 1266 1267 static int perf_stat_init_aggr_mode(void) 1268 { 1269 int nr; 1270 1271 switch (stat_config.aggr_mode) { 1272 case AGGR_SOCKET: 1273 if (cpu_map__build_socket_map(evsel_list->core.cpus, &stat_config.aggr_map)) { 1274 perror("cannot build socket map"); 1275 return -1; 1276 } 1277 stat_config.aggr_get_id = perf_stat__get_socket_cached; 1278 break; 1279 case AGGR_DIE: 1280 if (cpu_map__build_die_map(evsel_list->core.cpus, &stat_config.aggr_map)) { 1281 perror("cannot build die map"); 1282 return -1; 1283 } 1284 stat_config.aggr_get_id = perf_stat__get_die_cached; 1285 break; 1286 case AGGR_CORE: 1287 if (cpu_map__build_core_map(evsel_list->core.cpus, &stat_config.aggr_map)) { 1288 perror("cannot build core map"); 1289 return -1; 1290 } 1291 stat_config.aggr_get_id = perf_stat__get_core_cached; 1292 break; 1293 case AGGR_NODE: 1294 if (cpu_map__build_node_map(evsel_list->core.cpus, &stat_config.aggr_map)) { 1295 perror("cannot build core map"); 1296 return -1; 1297 } 1298 stat_config.aggr_get_id = perf_stat__get_node_cached; 1299 break; 1300 case AGGR_NONE: 1301 if (term_percore_set()) { 1302 if (cpu_map__build_core_map(evsel_list->core.cpus, 1303 &stat_config.aggr_map)) { 1304 perror("cannot build core map"); 1305 return -1; 1306 } 1307 stat_config.aggr_get_id = perf_stat__get_core_cached; 1308 } 1309 break; 1310 case AGGR_GLOBAL: 1311 case AGGR_THREAD: 1312 case AGGR_UNSET: 1313 default: 1314 break; 1315 } 1316 1317 /* 1318 * The evsel_list->cpus is the base we operate on, 1319 * taking the highest cpu number to be the size of 1320 * the aggregation translate cpumap. 1321 */ 1322 nr = perf_cpu_map__max(evsel_list->core.cpus); 1323 stat_config.cpus_aggr_map = cpu_aggr_map__empty_new(nr + 1); 1324 return stat_config.cpus_aggr_map ? 0 : -ENOMEM; 1325 } 1326 1327 static void cpu_aggr_map__delete(struct cpu_aggr_map *map) 1328 { 1329 if (map) { 1330 WARN_ONCE(refcount_read(&map->refcnt) != 0, 1331 "cpu_aggr_map refcnt unbalanced\n"); 1332 free(map); 1333 } 1334 } 1335 1336 static void cpu_aggr_map__put(struct cpu_aggr_map *map) 1337 { 1338 if (map && refcount_dec_and_test(&map->refcnt)) 1339 cpu_aggr_map__delete(map); 1340 } 1341 1342 static void perf_stat__exit_aggr_mode(void) 1343 { 1344 cpu_aggr_map__put(stat_config.aggr_map); 1345 cpu_aggr_map__put(stat_config.cpus_aggr_map); 1346 stat_config.aggr_map = NULL; 1347 stat_config.cpus_aggr_map = NULL; 1348 } 1349 1350 static inline int perf_env__get_cpu(struct perf_env *env, struct perf_cpu_map *map, int idx) 1351 { 1352 int cpu; 1353 1354 if (idx > map->nr) 1355 return -1; 1356 1357 cpu = map->map[idx]; 1358 1359 if (cpu >= env->nr_cpus_avail) 1360 return -1; 1361 1362 return cpu; 1363 } 1364 1365 static struct aggr_cpu_id perf_env__get_socket(struct perf_cpu_map *map, int idx, void *data) 1366 { 1367 struct perf_env *env = data; 1368 int cpu = perf_env__get_cpu(env, map, idx); 1369 struct aggr_cpu_id id = cpu_map__empty_aggr_cpu_id(); 1370 1371 if (cpu != -1) 1372 id.socket = env->cpu[cpu].socket_id; 1373 1374 return id; 1375 } 1376 1377 static struct aggr_cpu_id perf_env__get_die(struct perf_cpu_map *map, int idx, void *data) 1378 { 1379 struct perf_env *env = data; 1380 struct aggr_cpu_id id = cpu_map__empty_aggr_cpu_id(); 1381 int cpu = perf_env__get_cpu(env, map, idx); 1382 1383 if (cpu != -1) { 1384 /* 1385 * die_id is relative to socket, so start 1386 * with the socket ID and then add die to 1387 * make a unique ID. 1388 */ 1389 id.socket = env->cpu[cpu].socket_id; 1390 id.die = env->cpu[cpu].die_id; 1391 } 1392 1393 return id; 1394 } 1395 1396 static struct aggr_cpu_id perf_env__get_core(struct perf_cpu_map *map, int idx, void *data) 1397 { 1398 struct perf_env *env = data; 1399 struct aggr_cpu_id id = cpu_map__empty_aggr_cpu_id(); 1400 int cpu = perf_env__get_cpu(env, map, idx); 1401 1402 if (cpu != -1) { 1403 /* 1404 * core_id is relative to socket and die, 1405 * we need a global id. So we set 1406 * socket, die id and core id 1407 */ 1408 id.socket = env->cpu[cpu].socket_id; 1409 id.die = env->cpu[cpu].die_id; 1410 id.core = env->cpu[cpu].core_id; 1411 } 1412 1413 return id; 1414 } 1415 1416 static struct aggr_cpu_id perf_env__get_node(struct perf_cpu_map *map, int idx, void *data) 1417 { 1418 int cpu = perf_env__get_cpu(data, map, idx); 1419 struct aggr_cpu_id id = cpu_map__empty_aggr_cpu_id(); 1420 1421 id.node = perf_env__numa_node(data, cpu); 1422 return id; 1423 } 1424 1425 static int perf_env__build_socket_map(struct perf_env *env, struct perf_cpu_map *cpus, 1426 struct cpu_aggr_map **sockp) 1427 { 1428 return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env); 1429 } 1430 1431 static int perf_env__build_die_map(struct perf_env *env, struct perf_cpu_map *cpus, 1432 struct cpu_aggr_map **diep) 1433 { 1434 return cpu_map__build_map(cpus, diep, perf_env__get_die, env); 1435 } 1436 1437 static int perf_env__build_core_map(struct perf_env *env, struct perf_cpu_map *cpus, 1438 struct cpu_aggr_map **corep) 1439 { 1440 return cpu_map__build_map(cpus, corep, perf_env__get_core, env); 1441 } 1442 1443 static int perf_env__build_node_map(struct perf_env *env, struct perf_cpu_map *cpus, 1444 struct cpu_aggr_map **nodep) 1445 { 1446 return cpu_map__build_map(cpus, nodep, perf_env__get_node, env); 1447 } 1448 1449 static struct aggr_cpu_id perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused, 1450 struct perf_cpu_map *map, int idx) 1451 { 1452 return perf_env__get_socket(map, idx, &perf_stat.session->header.env); 1453 } 1454 static struct aggr_cpu_id perf_stat__get_die_file(struct perf_stat_config *config __maybe_unused, 1455 struct perf_cpu_map *map, int idx) 1456 { 1457 return perf_env__get_die(map, idx, &perf_stat.session->header.env); 1458 } 1459 1460 static struct aggr_cpu_id perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused, 1461 struct perf_cpu_map *map, int idx) 1462 { 1463 return perf_env__get_core(map, idx, &perf_stat.session->header.env); 1464 } 1465 1466 static struct aggr_cpu_id perf_stat__get_node_file(struct perf_stat_config *config __maybe_unused, 1467 struct perf_cpu_map *map, int idx) 1468 { 1469 return perf_env__get_node(map, idx, &perf_stat.session->header.env); 1470 } 1471 1472 static int perf_stat_init_aggr_mode_file(struct perf_stat *st) 1473 { 1474 struct perf_env *env = &st->session->header.env; 1475 1476 switch (stat_config.aggr_mode) { 1477 case AGGR_SOCKET: 1478 if (perf_env__build_socket_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) { 1479 perror("cannot build socket map"); 1480 return -1; 1481 } 1482 stat_config.aggr_get_id = perf_stat__get_socket_file; 1483 break; 1484 case AGGR_DIE: 1485 if (perf_env__build_die_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) { 1486 perror("cannot build die map"); 1487 return -1; 1488 } 1489 stat_config.aggr_get_id = perf_stat__get_die_file; 1490 break; 1491 case AGGR_CORE: 1492 if (perf_env__build_core_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) { 1493 perror("cannot build core map"); 1494 return -1; 1495 } 1496 stat_config.aggr_get_id = perf_stat__get_core_file; 1497 break; 1498 case AGGR_NODE: 1499 if (perf_env__build_node_map(env, evsel_list->core.cpus, &stat_config.aggr_map)) { 1500 perror("cannot build core map"); 1501 return -1; 1502 } 1503 stat_config.aggr_get_id = perf_stat__get_node_file; 1504 break; 1505 case AGGR_NONE: 1506 case AGGR_GLOBAL: 1507 case AGGR_THREAD: 1508 case AGGR_UNSET: 1509 default: 1510 break; 1511 } 1512 1513 return 0; 1514 } 1515 1516 /* 1517 * Add default attributes, if there were no attributes specified or 1518 * if -d/--detailed, -d -d or -d -d -d is used: 1519 */ 1520 static int add_default_attributes(void) 1521 { 1522 int err; 1523 struct perf_event_attr default_attrs0[] = { 1524 1525 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK }, 1526 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES }, 1527 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS }, 1528 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS }, 1529 1530 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, 1531 }; 1532 struct perf_event_attr frontend_attrs[] = { 1533 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND }, 1534 }; 1535 struct perf_event_attr backend_attrs[] = { 1536 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND }, 1537 }; 1538 struct perf_event_attr default_attrs1[] = { 1539 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, 1540 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS }, 1541 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES }, 1542 1543 }; 1544 1545 /* 1546 * Detailed stats (-d), covering the L1 and last level data caches: 1547 */ 1548 struct perf_event_attr detailed_attrs[] = { 1549 1550 { .type = PERF_TYPE_HW_CACHE, 1551 .config = 1552 PERF_COUNT_HW_CACHE_L1D << 0 | 1553 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1554 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1555 1556 { .type = PERF_TYPE_HW_CACHE, 1557 .config = 1558 PERF_COUNT_HW_CACHE_L1D << 0 | 1559 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1560 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1561 1562 { .type = PERF_TYPE_HW_CACHE, 1563 .config = 1564 PERF_COUNT_HW_CACHE_LL << 0 | 1565 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1566 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1567 1568 { .type = PERF_TYPE_HW_CACHE, 1569 .config = 1570 PERF_COUNT_HW_CACHE_LL << 0 | 1571 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1572 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1573 }; 1574 1575 /* 1576 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches: 1577 */ 1578 struct perf_event_attr very_detailed_attrs[] = { 1579 1580 { .type = PERF_TYPE_HW_CACHE, 1581 .config = 1582 PERF_COUNT_HW_CACHE_L1I << 0 | 1583 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1584 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1585 1586 { .type = PERF_TYPE_HW_CACHE, 1587 .config = 1588 PERF_COUNT_HW_CACHE_L1I << 0 | 1589 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1590 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1591 1592 { .type = PERF_TYPE_HW_CACHE, 1593 .config = 1594 PERF_COUNT_HW_CACHE_DTLB << 0 | 1595 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1596 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1597 1598 { .type = PERF_TYPE_HW_CACHE, 1599 .config = 1600 PERF_COUNT_HW_CACHE_DTLB << 0 | 1601 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1602 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1603 1604 { .type = PERF_TYPE_HW_CACHE, 1605 .config = 1606 PERF_COUNT_HW_CACHE_ITLB << 0 | 1607 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1608 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1609 1610 { .type = PERF_TYPE_HW_CACHE, 1611 .config = 1612 PERF_COUNT_HW_CACHE_ITLB << 0 | 1613 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1614 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1615 1616 }; 1617 1618 /* 1619 * Very, very detailed stats (-d -d -d), adding prefetch events: 1620 */ 1621 struct perf_event_attr very_very_detailed_attrs[] = { 1622 1623 { .type = PERF_TYPE_HW_CACHE, 1624 .config = 1625 PERF_COUNT_HW_CACHE_L1D << 0 | 1626 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) | 1627 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1628 1629 { .type = PERF_TYPE_HW_CACHE, 1630 .config = 1631 PERF_COUNT_HW_CACHE_L1D << 0 | 1632 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) | 1633 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1634 }; 1635 struct parse_events_error errinfo; 1636 1637 /* Set attrs if no event is selected and !null_run: */ 1638 if (stat_config.null_run) 1639 return 0; 1640 1641 bzero(&errinfo, sizeof(errinfo)); 1642 if (transaction_run) { 1643 /* Handle -T as -M transaction. Once platform specific metrics 1644 * support has been added to the json files, all archictures 1645 * will use this approach. To determine transaction support 1646 * on an architecture test for such a metric name. 1647 */ 1648 if (metricgroup__has_metric("transaction")) { 1649 struct option opt = { .value = &evsel_list }; 1650 1651 return metricgroup__parse_groups(&opt, "transaction", 1652 stat_config.metric_no_group, 1653 stat_config.metric_no_merge, 1654 &stat_config.metric_events); 1655 } 1656 1657 if (pmu_have_event("cpu", "cycles-ct") && 1658 pmu_have_event("cpu", "el-start")) 1659 err = parse_events(evsel_list, transaction_attrs, 1660 &errinfo); 1661 else 1662 err = parse_events(evsel_list, 1663 transaction_limited_attrs, 1664 &errinfo); 1665 if (err) { 1666 fprintf(stderr, "Cannot set up transaction events\n"); 1667 parse_events_print_error(&errinfo, transaction_attrs); 1668 return -1; 1669 } 1670 return 0; 1671 } 1672 1673 if (smi_cost) { 1674 int smi; 1675 1676 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) { 1677 fprintf(stderr, "freeze_on_smi is not supported.\n"); 1678 return -1; 1679 } 1680 1681 if (!smi) { 1682 if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) { 1683 fprintf(stderr, "Failed to set freeze_on_smi.\n"); 1684 return -1; 1685 } 1686 smi_reset = true; 1687 } 1688 1689 if (pmu_have_event("msr", "aperf") && 1690 pmu_have_event("msr", "smi")) { 1691 if (!force_metric_only) 1692 stat_config.metric_only = true; 1693 err = parse_events(evsel_list, smi_cost_attrs, &errinfo); 1694 } else { 1695 fprintf(stderr, "To measure SMI cost, it needs " 1696 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n"); 1697 parse_events_print_error(&errinfo, smi_cost_attrs); 1698 return -1; 1699 } 1700 if (err) { 1701 parse_events_print_error(&errinfo, smi_cost_attrs); 1702 fprintf(stderr, "Cannot set up SMI cost events\n"); 1703 return -1; 1704 } 1705 return 0; 1706 } 1707 1708 if (topdown_run) { 1709 char *str = NULL; 1710 bool warn = false; 1711 1712 if (!force_metric_only) 1713 stat_config.metric_only = true; 1714 1715 if (topdown_filter_events(topdown_metric_attrs, &str, 1) < 0) { 1716 pr_err("Out of memory\n"); 1717 return -1; 1718 } 1719 if (topdown_metric_attrs[0] && str) { 1720 if (!stat_config.interval && !stat_config.metric_only) { 1721 fprintf(stat_config.output, 1722 "Topdown accuracy may decrease when measuring long periods.\n" 1723 "Please print the result regularly, e.g. -I1000\n"); 1724 } 1725 goto setup_metrics; 1726 } 1727 1728 zfree(&str); 1729 1730 if (stat_config.aggr_mode != AGGR_GLOBAL && 1731 stat_config.aggr_mode != AGGR_CORE) { 1732 pr_err("top down event configuration requires --per-core mode\n"); 1733 return -1; 1734 } 1735 stat_config.aggr_mode = AGGR_CORE; 1736 if (nr_cgroups || !target__has_cpu(&target)) { 1737 pr_err("top down event configuration requires system-wide mode (-a)\n"); 1738 return -1; 1739 } 1740 1741 if (topdown_filter_events(topdown_attrs, &str, 1742 arch_topdown_check_group(&warn)) < 0) { 1743 pr_err("Out of memory\n"); 1744 return -1; 1745 } 1746 if (topdown_attrs[0] && str) { 1747 if (warn) 1748 arch_topdown_group_warn(); 1749 setup_metrics: 1750 err = parse_events(evsel_list, str, &errinfo); 1751 if (err) { 1752 fprintf(stderr, 1753 "Cannot set up top down events %s: %d\n", 1754 str, err); 1755 parse_events_print_error(&errinfo, str); 1756 free(str); 1757 return -1; 1758 } 1759 } else { 1760 fprintf(stderr, "System does not support topdown\n"); 1761 return -1; 1762 } 1763 free(str); 1764 } 1765 1766 if (!evsel_list->core.nr_entries) { 1767 if (target__has_cpu(&target)) 1768 default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK; 1769 1770 if (evlist__add_default_attrs(evsel_list, default_attrs0) < 0) 1771 return -1; 1772 if (pmu_have_event("cpu", "stalled-cycles-frontend")) { 1773 if (evlist__add_default_attrs(evsel_list, frontend_attrs) < 0) 1774 return -1; 1775 } 1776 if (pmu_have_event("cpu", "stalled-cycles-backend")) { 1777 if (evlist__add_default_attrs(evsel_list, backend_attrs) < 0) 1778 return -1; 1779 } 1780 if (evlist__add_default_attrs(evsel_list, default_attrs1) < 0) 1781 return -1; 1782 } 1783 1784 /* Detailed events get appended to the event list: */ 1785 1786 if (detailed_run < 1) 1787 return 0; 1788 1789 /* Append detailed run extra attributes: */ 1790 if (evlist__add_default_attrs(evsel_list, detailed_attrs) < 0) 1791 return -1; 1792 1793 if (detailed_run < 2) 1794 return 0; 1795 1796 /* Append very detailed run extra attributes: */ 1797 if (evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0) 1798 return -1; 1799 1800 if (detailed_run < 3) 1801 return 0; 1802 1803 /* Append very, very detailed run extra attributes: */ 1804 return evlist__add_default_attrs(evsel_list, very_very_detailed_attrs); 1805 } 1806 1807 static const char * const stat_record_usage[] = { 1808 "perf stat record [<options>]", 1809 NULL, 1810 }; 1811 1812 static void init_features(struct perf_session *session) 1813 { 1814 int feat; 1815 1816 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++) 1817 perf_header__set_feat(&session->header, feat); 1818 1819 perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT); 1820 perf_header__clear_feat(&session->header, HEADER_BUILD_ID); 1821 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA); 1822 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); 1823 perf_header__clear_feat(&session->header, HEADER_AUXTRACE); 1824 } 1825 1826 static int __cmd_record(int argc, const char **argv) 1827 { 1828 struct perf_session *session; 1829 struct perf_data *data = &perf_stat.data; 1830 1831 argc = parse_options(argc, argv, stat_options, stat_record_usage, 1832 PARSE_OPT_STOP_AT_NON_OPTION); 1833 1834 if (output_name) 1835 data->path = output_name; 1836 1837 if (stat_config.run_count != 1 || forever) { 1838 pr_err("Cannot use -r option with perf stat record.\n"); 1839 return -1; 1840 } 1841 1842 session = perf_session__new(data, false, NULL); 1843 if (IS_ERR(session)) { 1844 pr_err("Perf session creation failed\n"); 1845 return PTR_ERR(session); 1846 } 1847 1848 init_features(session); 1849 1850 session->evlist = evsel_list; 1851 perf_stat.session = session; 1852 perf_stat.record = true; 1853 return argc; 1854 } 1855 1856 static int process_stat_round_event(struct perf_session *session, 1857 union perf_event *event) 1858 { 1859 struct perf_record_stat_round *stat_round = &event->stat_round; 1860 struct evsel *counter; 1861 struct timespec tsh, *ts = NULL; 1862 const char **argv = session->header.env.cmdline_argv; 1863 int argc = session->header.env.nr_cmdline; 1864 1865 evlist__for_each_entry(evsel_list, counter) 1866 perf_stat_process_counter(&stat_config, counter); 1867 1868 if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL) 1869 update_stats(&walltime_nsecs_stats, stat_round->time); 1870 1871 if (stat_config.interval && stat_round->time) { 1872 tsh.tv_sec = stat_round->time / NSEC_PER_SEC; 1873 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC; 1874 ts = &tsh; 1875 } 1876 1877 print_counters(ts, argc, argv); 1878 return 0; 1879 } 1880 1881 static 1882 int process_stat_config_event(struct perf_session *session, 1883 union perf_event *event) 1884 { 1885 struct perf_tool *tool = session->tool; 1886 struct perf_stat *st = container_of(tool, struct perf_stat, tool); 1887 1888 perf_event__read_stat_config(&stat_config, &event->stat_config); 1889 1890 if (perf_cpu_map__empty(st->cpus)) { 1891 if (st->aggr_mode != AGGR_UNSET) 1892 pr_warning("warning: processing task data, aggregation mode not set\n"); 1893 return 0; 1894 } 1895 1896 if (st->aggr_mode != AGGR_UNSET) 1897 stat_config.aggr_mode = st->aggr_mode; 1898 1899 if (perf_stat.data.is_pipe) 1900 perf_stat_init_aggr_mode(); 1901 else 1902 perf_stat_init_aggr_mode_file(st); 1903 1904 return 0; 1905 } 1906 1907 static int set_maps(struct perf_stat *st) 1908 { 1909 if (!st->cpus || !st->threads) 1910 return 0; 1911 1912 if (WARN_ONCE(st->maps_allocated, "stats double allocation\n")) 1913 return -EINVAL; 1914 1915 perf_evlist__set_maps(&evsel_list->core, st->cpus, st->threads); 1916 1917 if (evlist__alloc_stats(evsel_list, true)) 1918 return -ENOMEM; 1919 1920 st->maps_allocated = true; 1921 return 0; 1922 } 1923 1924 static 1925 int process_thread_map_event(struct perf_session *session, 1926 union perf_event *event) 1927 { 1928 struct perf_tool *tool = session->tool; 1929 struct perf_stat *st = container_of(tool, struct perf_stat, tool); 1930 1931 if (st->threads) { 1932 pr_warning("Extra thread map event, ignoring.\n"); 1933 return 0; 1934 } 1935 1936 st->threads = thread_map__new_event(&event->thread_map); 1937 if (!st->threads) 1938 return -ENOMEM; 1939 1940 return set_maps(st); 1941 } 1942 1943 static 1944 int process_cpu_map_event(struct perf_session *session, 1945 union perf_event *event) 1946 { 1947 struct perf_tool *tool = session->tool; 1948 struct perf_stat *st = container_of(tool, struct perf_stat, tool); 1949 struct perf_cpu_map *cpus; 1950 1951 if (st->cpus) { 1952 pr_warning("Extra cpu map event, ignoring.\n"); 1953 return 0; 1954 } 1955 1956 cpus = cpu_map__new_data(&event->cpu_map.data); 1957 if (!cpus) 1958 return -ENOMEM; 1959 1960 st->cpus = cpus; 1961 return set_maps(st); 1962 } 1963 1964 static const char * const stat_report_usage[] = { 1965 "perf stat report [<options>]", 1966 NULL, 1967 }; 1968 1969 static struct perf_stat perf_stat = { 1970 .tool = { 1971 .attr = perf_event__process_attr, 1972 .event_update = perf_event__process_event_update, 1973 .thread_map = process_thread_map_event, 1974 .cpu_map = process_cpu_map_event, 1975 .stat_config = process_stat_config_event, 1976 .stat = perf_event__process_stat_event, 1977 .stat_round = process_stat_round_event, 1978 }, 1979 .aggr_mode = AGGR_UNSET, 1980 }; 1981 1982 static int __cmd_report(int argc, const char **argv) 1983 { 1984 struct perf_session *session; 1985 const struct option options[] = { 1986 OPT_STRING('i', "input", &input_name, "file", "input file name"), 1987 OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode, 1988 "aggregate counts per processor socket", AGGR_SOCKET), 1989 OPT_SET_UINT(0, "per-die", &perf_stat.aggr_mode, 1990 "aggregate counts per processor die", AGGR_DIE), 1991 OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode, 1992 "aggregate counts per physical processor core", AGGR_CORE), 1993 OPT_SET_UINT(0, "per-node", &perf_stat.aggr_mode, 1994 "aggregate counts per numa node", AGGR_NODE), 1995 OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode, 1996 "disable CPU count aggregation", AGGR_NONE), 1997 OPT_END() 1998 }; 1999 struct stat st; 2000 int ret; 2001 2002 argc = parse_options(argc, argv, options, stat_report_usage, 0); 2003 2004 if (!input_name || !strlen(input_name)) { 2005 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode)) 2006 input_name = "-"; 2007 else 2008 input_name = "perf.data"; 2009 } 2010 2011 perf_stat.data.path = input_name; 2012 perf_stat.data.mode = PERF_DATA_MODE_READ; 2013 2014 session = perf_session__new(&perf_stat.data, false, &perf_stat.tool); 2015 if (IS_ERR(session)) 2016 return PTR_ERR(session); 2017 2018 perf_stat.session = session; 2019 stat_config.output = stderr; 2020 evsel_list = session->evlist; 2021 2022 ret = perf_session__process_events(session); 2023 if (ret) 2024 return ret; 2025 2026 perf_session__delete(session); 2027 return 0; 2028 } 2029 2030 static void setup_system_wide(int forks) 2031 { 2032 /* 2033 * Make system wide (-a) the default target if 2034 * no target was specified and one of following 2035 * conditions is met: 2036 * 2037 * - there's no workload specified 2038 * - there is workload specified but all requested 2039 * events are system wide events 2040 */ 2041 if (!target__none(&target)) 2042 return; 2043 2044 if (!forks) 2045 target.system_wide = true; 2046 else { 2047 struct evsel *counter; 2048 2049 evlist__for_each_entry(evsel_list, counter) { 2050 if (!counter->core.system_wide && 2051 strcmp(counter->name, "duration_time")) { 2052 return; 2053 } 2054 } 2055 2056 if (evsel_list->core.nr_entries) 2057 target.system_wide = true; 2058 } 2059 } 2060 2061 int cmd_stat(int argc, const char **argv) 2062 { 2063 const char * const stat_usage[] = { 2064 "perf stat [<options>] [<command>]", 2065 NULL 2066 }; 2067 int status = -EINVAL, run_idx; 2068 const char *mode; 2069 FILE *output = stderr; 2070 unsigned int interval, timeout; 2071 const char * const stat_subcommands[] = { "record", "report" }; 2072 2073 setlocale(LC_ALL, ""); 2074 2075 evsel_list = evlist__new(); 2076 if (evsel_list == NULL) 2077 return -ENOMEM; 2078 2079 parse_events__shrink_config_terms(); 2080 2081 /* String-parsing callback-based options would segfault when negated */ 2082 set_option_flag(stat_options, 'e', "event", PARSE_OPT_NONEG); 2083 set_option_flag(stat_options, 'M', "metrics", PARSE_OPT_NONEG); 2084 set_option_flag(stat_options, 'G', "cgroup", PARSE_OPT_NONEG); 2085 2086 argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands, 2087 (const char **) stat_usage, 2088 PARSE_OPT_STOP_AT_NON_OPTION); 2089 perf_stat__collect_metric_expr(evsel_list); 2090 perf_stat__init_shadow_stats(); 2091 2092 if (stat_config.csv_sep) { 2093 stat_config.csv_output = true; 2094 if (!strcmp(stat_config.csv_sep, "\\t")) 2095 stat_config.csv_sep = "\t"; 2096 } else 2097 stat_config.csv_sep = DEFAULT_SEPARATOR; 2098 2099 if (argc && !strncmp(argv[0], "rec", 3)) { 2100 argc = __cmd_record(argc, argv); 2101 if (argc < 0) 2102 return -1; 2103 } else if (argc && !strncmp(argv[0], "rep", 3)) 2104 return __cmd_report(argc, argv); 2105 2106 interval = stat_config.interval; 2107 timeout = stat_config.timeout; 2108 2109 /* 2110 * For record command the -o is already taken care of. 2111 */ 2112 if (!STAT_RECORD && output_name && strcmp(output_name, "-")) 2113 output = NULL; 2114 2115 if (output_name && output_fd) { 2116 fprintf(stderr, "cannot use both --output and --log-fd\n"); 2117 parse_options_usage(stat_usage, stat_options, "o", 1); 2118 parse_options_usage(NULL, stat_options, "log-fd", 0); 2119 goto out; 2120 } 2121 2122 if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) { 2123 fprintf(stderr, "--metric-only is not supported with --per-thread\n"); 2124 goto out; 2125 } 2126 2127 if (stat_config.metric_only && stat_config.run_count > 1) { 2128 fprintf(stderr, "--metric-only is not supported with -r\n"); 2129 goto out; 2130 } 2131 2132 if (stat_config.walltime_run_table && stat_config.run_count <= 1) { 2133 fprintf(stderr, "--table is only supported with -r\n"); 2134 parse_options_usage(stat_usage, stat_options, "r", 1); 2135 parse_options_usage(NULL, stat_options, "table", 0); 2136 goto out; 2137 } 2138 2139 if (output_fd < 0) { 2140 fprintf(stderr, "argument to --log-fd must be a > 0\n"); 2141 parse_options_usage(stat_usage, stat_options, "log-fd", 0); 2142 goto out; 2143 } 2144 2145 if (!output && !stat_config.quiet) { 2146 struct timespec tm; 2147 mode = append_file ? "a" : "w"; 2148 2149 output = fopen(output_name, mode); 2150 if (!output) { 2151 perror("failed to create output file"); 2152 return -1; 2153 } 2154 clock_gettime(CLOCK_REALTIME, &tm); 2155 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec)); 2156 } else if (output_fd > 0) { 2157 mode = append_file ? "a" : "w"; 2158 output = fdopen(output_fd, mode); 2159 if (!output) { 2160 perror("Failed opening logfd"); 2161 return -errno; 2162 } 2163 } 2164 2165 stat_config.output = output; 2166 2167 /* 2168 * let the spreadsheet do the pretty-printing 2169 */ 2170 if (stat_config.csv_output) { 2171 /* User explicitly passed -B? */ 2172 if (big_num_opt == 1) { 2173 fprintf(stderr, "-B option not supported with -x\n"); 2174 parse_options_usage(stat_usage, stat_options, "B", 1); 2175 parse_options_usage(NULL, stat_options, "x", 1); 2176 goto out; 2177 } else /* Nope, so disable big number formatting */ 2178 stat_config.big_num = false; 2179 } else if (big_num_opt == 0) /* User passed --no-big-num */ 2180 stat_config.big_num = false; 2181 2182 setup_system_wide(argc); 2183 2184 /* 2185 * Display user/system times only for single 2186 * run and when there's specified tracee. 2187 */ 2188 if ((stat_config.run_count == 1) && target__none(&target)) 2189 stat_config.ru_display = true; 2190 2191 if (stat_config.run_count < 0) { 2192 pr_err("Run count must be a positive number\n"); 2193 parse_options_usage(stat_usage, stat_options, "r", 1); 2194 goto out; 2195 } else if (stat_config.run_count == 0) { 2196 forever = true; 2197 stat_config.run_count = 1; 2198 } 2199 2200 if (stat_config.walltime_run_table) { 2201 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0])); 2202 if (!stat_config.walltime_run) { 2203 pr_err("failed to setup -r option"); 2204 goto out; 2205 } 2206 } 2207 2208 if ((stat_config.aggr_mode == AGGR_THREAD) && 2209 !target__has_task(&target)) { 2210 if (!target.system_wide || target.cpu_list) { 2211 fprintf(stderr, "The --per-thread option is only " 2212 "available when monitoring via -p -t -a " 2213 "options or only --per-thread.\n"); 2214 parse_options_usage(NULL, stat_options, "p", 1); 2215 parse_options_usage(NULL, stat_options, "t", 1); 2216 goto out; 2217 } 2218 } 2219 2220 /* 2221 * no_aggr, cgroup are for system-wide only 2222 * --per-thread is aggregated per thread, we dont mix it with cpu mode 2223 */ 2224 if (((stat_config.aggr_mode != AGGR_GLOBAL && 2225 stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) && 2226 !target__has_cpu(&target)) { 2227 fprintf(stderr, "both cgroup and no-aggregation " 2228 "modes only available in system-wide mode\n"); 2229 2230 parse_options_usage(stat_usage, stat_options, "G", 1); 2231 parse_options_usage(NULL, stat_options, "A", 1); 2232 parse_options_usage(NULL, stat_options, "a", 1); 2233 goto out; 2234 } 2235 2236 if (add_default_attributes()) 2237 goto out; 2238 2239 if (stat_config.cgroup_list) { 2240 if (nr_cgroups > 0) { 2241 pr_err("--cgroup and --for-each-cgroup cannot be used together\n"); 2242 parse_options_usage(stat_usage, stat_options, "G", 1); 2243 parse_options_usage(NULL, stat_options, "for-each-cgroup", 0); 2244 goto out; 2245 } 2246 2247 if (evlist__expand_cgroup(evsel_list, stat_config.cgroup_list, 2248 &stat_config.metric_events, true) < 0) { 2249 parse_options_usage(stat_usage, stat_options, 2250 "for-each-cgroup", 0); 2251 goto out; 2252 } 2253 } 2254 2255 target__validate(&target); 2256 2257 if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide)) 2258 target.per_thread = true; 2259 2260 if (evlist__create_maps(evsel_list, &target) < 0) { 2261 if (target__has_task(&target)) { 2262 pr_err("Problems finding threads of monitor\n"); 2263 parse_options_usage(stat_usage, stat_options, "p", 1); 2264 parse_options_usage(NULL, stat_options, "t", 1); 2265 } else if (target__has_cpu(&target)) { 2266 perror("failed to parse CPUs map"); 2267 parse_options_usage(stat_usage, stat_options, "C", 1); 2268 parse_options_usage(NULL, stat_options, "a", 1); 2269 } 2270 goto out; 2271 } 2272 2273 evlist__check_cpu_maps(evsel_list); 2274 2275 /* 2276 * Initialize thread_map with comm names, 2277 * so we could print it out on output. 2278 */ 2279 if (stat_config.aggr_mode == AGGR_THREAD) { 2280 thread_map__read_comms(evsel_list->core.threads); 2281 if (target.system_wide) { 2282 if (runtime_stat_new(&stat_config, 2283 perf_thread_map__nr(evsel_list->core.threads))) { 2284 goto out; 2285 } 2286 } 2287 } 2288 2289 if (stat_config.aggr_mode == AGGR_NODE) 2290 cpu__setup_cpunode_map(); 2291 2292 if (stat_config.times && interval) 2293 interval_count = true; 2294 else if (stat_config.times && !interval) { 2295 pr_err("interval-count option should be used together with " 2296 "interval-print.\n"); 2297 parse_options_usage(stat_usage, stat_options, "interval-count", 0); 2298 parse_options_usage(stat_usage, stat_options, "I", 1); 2299 goto out; 2300 } 2301 2302 if (timeout && timeout < 100) { 2303 if (timeout < 10) { 2304 pr_err("timeout must be >= 10ms.\n"); 2305 parse_options_usage(stat_usage, stat_options, "timeout", 0); 2306 goto out; 2307 } else 2308 pr_warning("timeout < 100ms. " 2309 "The overhead percentage could be high in some cases. " 2310 "Please proceed with caution.\n"); 2311 } 2312 if (timeout && interval) { 2313 pr_err("timeout option is not supported with interval-print.\n"); 2314 parse_options_usage(stat_usage, stat_options, "timeout", 0); 2315 parse_options_usage(stat_usage, stat_options, "I", 1); 2316 goto out; 2317 } 2318 2319 if (evlist__alloc_stats(evsel_list, interval)) 2320 goto out; 2321 2322 if (perf_stat_init_aggr_mode()) 2323 goto out; 2324 2325 /* 2326 * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless 2327 * while avoiding that older tools show confusing messages. 2328 * 2329 * However for pipe sessions we need to keep it zero, 2330 * because script's perf_evsel__check_attr is triggered 2331 * by attr->sample_type != 0, and we can't run it on 2332 * stat sessions. 2333 */ 2334 stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe); 2335 2336 /* 2337 * We dont want to block the signals - that would cause 2338 * child tasks to inherit that and Ctrl-C would not work. 2339 * What we want is for Ctrl-C to work in the exec()-ed 2340 * task, but being ignored by perf stat itself: 2341 */ 2342 atexit(sig_atexit); 2343 if (!forever) 2344 signal(SIGINT, skip_signal); 2345 signal(SIGCHLD, skip_signal); 2346 signal(SIGALRM, skip_signal); 2347 signal(SIGABRT, skip_signal); 2348 2349 if (evlist__initialize_ctlfd(evsel_list, stat_config.ctl_fd, stat_config.ctl_fd_ack)) 2350 goto out; 2351 2352 status = 0; 2353 for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) { 2354 if (stat_config.run_count != 1 && verbose > 0) 2355 fprintf(output, "[ perf stat: executing run #%d ... ]\n", 2356 run_idx + 1); 2357 2358 if (run_idx != 0) 2359 evlist__reset_prev_raw_counts(evsel_list); 2360 2361 status = run_perf_stat(argc, argv, run_idx); 2362 if (forever && status != -1 && !interval) { 2363 print_counters(NULL, argc, argv); 2364 perf_stat__reset_stats(); 2365 } 2366 } 2367 2368 if (!forever && status != -1 && (!interval || stat_config.summary)) 2369 print_counters(NULL, argc, argv); 2370 2371 evlist__finalize_ctlfd(evsel_list); 2372 2373 if (STAT_RECORD) { 2374 /* 2375 * We synthesize the kernel mmap record just so that older tools 2376 * don't emit warnings about not being able to resolve symbols 2377 * due to /proc/sys/kernel/kptr_restrict settings and instear provide 2378 * a saner message about no samples being in the perf.data file. 2379 * 2380 * This also serves to suppress a warning about f_header.data.size == 0 2381 * in header.c at the moment 'perf stat record' gets introduced, which 2382 * is not really needed once we start adding the stat specific PERF_RECORD_ 2383 * records, but the need to suppress the kptr_restrict messages in older 2384 * tools remain -acme 2385 */ 2386 int fd = perf_data__fd(&perf_stat.data); 2387 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat, 2388 process_synthesized_event, 2389 &perf_stat.session->machines.host); 2390 if (err) { 2391 pr_warning("Couldn't synthesize the kernel mmap record, harmless, " 2392 "older tools may produce warnings about this file\n."); 2393 } 2394 2395 if (!interval) { 2396 if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL)) 2397 pr_err("failed to write stat round event\n"); 2398 } 2399 2400 if (!perf_stat.data.is_pipe) { 2401 perf_stat.session->header.data_size += perf_stat.bytes_written; 2402 perf_session__write_header(perf_stat.session, evsel_list, fd, true); 2403 } 2404 2405 evlist__close(evsel_list); 2406 perf_session__delete(perf_stat.session); 2407 } 2408 2409 perf_stat__exit_aggr_mode(); 2410 evlist__free_stats(evsel_list); 2411 out: 2412 zfree(&stat_config.walltime_run); 2413 2414 if (smi_cost && smi_reset) 2415 sysfs__write_int(FREEZE_ON_SMI_PATH, 0); 2416 2417 evlist__delete(evsel_list); 2418 2419 metricgroup__rblist_exit(&stat_config.metric_events); 2420 runtime_stat_delete(&stat_config); 2421 evlist__close_control(stat_config.ctl_fd, stat_config.ctl_fd_ack, &stat_config.ctl_fd_close); 2422 2423 return status; 2424 } 2425