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