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