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