1 /* 2 * builtin-stat.c 3 * 4 * Builtin stat command: Give a precise performance counters summary 5 * overview about any workload, CPU or specific PID. 6 * 7 * Sample output: 8 9 $ perf stat ./hackbench 10 10 11 Time: 0.118 12 13 Performance counter stats for './hackbench 10': 14 15 1708.761321 task-clock # 11.037 CPUs utilized 16 41,190 context-switches # 0.024 M/sec 17 6,735 CPU-migrations # 0.004 M/sec 18 17,318 page-faults # 0.010 M/sec 19 5,205,202,243 cycles # 3.046 GHz 20 3,856,436,920 stalled-cycles-frontend # 74.09% frontend cycles idle 21 1,600,790,871 stalled-cycles-backend # 30.75% backend cycles idle 22 2,603,501,247 instructions # 0.50 insns per cycle 23 # 1.48 stalled cycles per insn 24 484,357,498 branches # 283.455 M/sec 25 6,388,934 branch-misses # 1.32% of all branches 26 27 0.154822978 seconds time elapsed 28 29 * 30 * Copyright (C) 2008-2011, Red Hat Inc, Ingo Molnar <mingo@redhat.com> 31 * 32 * Improvements and fixes by: 33 * 34 * Arjan van de Ven <arjan@linux.intel.com> 35 * Yanmin Zhang <yanmin.zhang@intel.com> 36 * Wu Fengguang <fengguang.wu@intel.com> 37 * Mike Galbraith <efault@gmx.de> 38 * Paul Mackerras <paulus@samba.org> 39 * Jaswinder Singh Rajput <jaswinder@kernel.org> 40 * 41 * Released under the GPL v2. (and only v2, not any later version) 42 */ 43 44 #include "perf.h" 45 #include "builtin.h" 46 #include "util/cgroup.h" 47 #include "util/util.h" 48 #include <subcmd/parse-options.h> 49 #include "util/parse-events.h" 50 #include "util/pmu.h" 51 #include "util/event.h" 52 #include "util/evlist.h" 53 #include "util/evsel.h" 54 #include "util/debug.h" 55 #include "util/drv_configs.h" 56 #include "util/color.h" 57 #include "util/stat.h" 58 #include "util/header.h" 59 #include "util/cpumap.h" 60 #include "util/thread.h" 61 #include "util/thread_map.h" 62 #include "util/counts.h" 63 #include "util/group.h" 64 #include "util/session.h" 65 #include "util/tool.h" 66 #include "util/string2.h" 67 #include "util/metricgroup.h" 68 #include "util/top.h" 69 #include "asm/bug.h" 70 71 #include <linux/time64.h> 72 #include <api/fs/fs.h> 73 #include <errno.h> 74 #include <signal.h> 75 #include <stdlib.h> 76 #include <sys/prctl.h> 77 #include <inttypes.h> 78 #include <locale.h> 79 #include <math.h> 80 #include <sys/types.h> 81 #include <sys/stat.h> 82 #include <sys/wait.h> 83 #include <unistd.h> 84 #include <sys/time.h> 85 #include <sys/resource.h> 86 #include <sys/wait.h> 87 88 #include "sane_ctype.h" 89 90 #define DEFAULT_SEPARATOR " " 91 #define FREEZE_ON_SMI_PATH "devices/cpu/freeze_on_smi" 92 93 static void print_counters(struct timespec *ts, int argc, const char **argv); 94 95 /* Default events used for perf stat -T */ 96 static const char *transaction_attrs = { 97 "task-clock," 98 "{" 99 "instructions," 100 "cycles," 101 "cpu/cycles-t/," 102 "cpu/tx-start/," 103 "cpu/el-start/," 104 "cpu/cycles-ct/" 105 "}" 106 }; 107 108 /* More limited version when the CPU does not have all events. */ 109 static const char * transaction_limited_attrs = { 110 "task-clock," 111 "{" 112 "instructions," 113 "cycles," 114 "cpu/cycles-t/," 115 "cpu/tx-start/" 116 "}" 117 }; 118 119 static const char * topdown_attrs[] = { 120 "topdown-total-slots", 121 "topdown-slots-retired", 122 "topdown-recovery-bubbles", 123 "topdown-fetch-bubbles", 124 "topdown-slots-issued", 125 NULL, 126 }; 127 128 static const char *smi_cost_attrs = { 129 "{" 130 "msr/aperf/," 131 "msr/smi/," 132 "cycles" 133 "}" 134 }; 135 136 static struct perf_evlist *evsel_list; 137 138 static struct target target = { 139 .uid = UINT_MAX, 140 }; 141 142 #define METRIC_ONLY_LEN 20 143 144 static volatile pid_t child_pid = -1; 145 static int detailed_run = 0; 146 static bool transaction_run; 147 static bool topdown_run = false; 148 static bool smi_cost = false; 149 static bool smi_reset = false; 150 static int big_num_opt = -1; 151 static bool group = false; 152 static const char *pre_cmd = NULL; 153 static const char *post_cmd = NULL; 154 static bool sync_run = false; 155 static bool forever = false; 156 static bool force_metric_only = false; 157 static struct timespec ref_time; 158 static bool append_file; 159 static bool interval_count; 160 static const char *output_name; 161 static int output_fd; 162 163 struct perf_stat { 164 bool record; 165 struct perf_data data; 166 struct perf_session *session; 167 u64 bytes_written; 168 struct perf_tool tool; 169 bool maps_allocated; 170 struct cpu_map *cpus; 171 struct thread_map *threads; 172 enum aggr_mode aggr_mode; 173 }; 174 175 static struct perf_stat perf_stat; 176 #define STAT_RECORD perf_stat.record 177 178 static volatile int done = 0; 179 180 static struct perf_stat_config stat_config = { 181 .aggr_mode = AGGR_GLOBAL, 182 .scale = true, 183 .unit_width = 4, /* strlen("unit") */ 184 .run_count = 1, 185 .metric_only_len = METRIC_ONLY_LEN, 186 .walltime_nsecs_stats = &walltime_nsecs_stats, 187 .big_num = true, 188 }; 189 190 static inline void diff_timespec(struct timespec *r, struct timespec *a, 191 struct timespec *b) 192 { 193 r->tv_sec = a->tv_sec - b->tv_sec; 194 if (a->tv_nsec < b->tv_nsec) { 195 r->tv_nsec = a->tv_nsec + NSEC_PER_SEC - b->tv_nsec; 196 r->tv_sec--; 197 } else { 198 r->tv_nsec = a->tv_nsec - b->tv_nsec ; 199 } 200 } 201 202 static void perf_stat__reset_stats(void) 203 { 204 int i; 205 206 perf_evlist__reset_stats(evsel_list); 207 perf_stat__reset_shadow_stats(); 208 209 for (i = 0; i < stat_config.stats_num; i++) 210 perf_stat__reset_shadow_per_stat(&stat_config.stats[i]); 211 } 212 213 static int process_synthesized_event(struct perf_tool *tool __maybe_unused, 214 union perf_event *event, 215 struct perf_sample *sample __maybe_unused, 216 struct machine *machine __maybe_unused) 217 { 218 if (perf_data__write(&perf_stat.data, event, event->header.size) < 0) { 219 pr_err("failed to write perf data, error: %m\n"); 220 return -1; 221 } 222 223 perf_stat.bytes_written += event->header.size; 224 return 0; 225 } 226 227 static int write_stat_round_event(u64 tm, u64 type) 228 { 229 return perf_event__synthesize_stat_round(NULL, tm, type, 230 process_synthesized_event, 231 NULL); 232 } 233 234 #define WRITE_STAT_ROUND_EVENT(time, interval) \ 235 write_stat_round_event(time, PERF_STAT_ROUND_TYPE__ ## interval) 236 237 #define SID(e, x, y) xyarray__entry(e->sample_id, x, y) 238 239 static int 240 perf_evsel__write_stat_event(struct perf_evsel *counter, u32 cpu, u32 thread, 241 struct perf_counts_values *count) 242 { 243 struct perf_sample_id *sid = SID(counter, cpu, thread); 244 245 return perf_event__synthesize_stat(NULL, cpu, thread, sid->id, count, 246 process_synthesized_event, NULL); 247 } 248 249 /* 250 * Read out the results of a single counter: 251 * do not aggregate counts across CPUs in system-wide mode 252 */ 253 static int read_counter(struct perf_evsel *counter) 254 { 255 int nthreads = thread_map__nr(evsel_list->threads); 256 int ncpus, cpu, thread; 257 258 if (target__has_cpu(&target) && !target__has_per_thread(&target)) 259 ncpus = perf_evsel__nr_cpus(counter); 260 else 261 ncpus = 1; 262 263 if (!counter->supported) 264 return -ENOENT; 265 266 if (counter->system_wide) 267 nthreads = 1; 268 269 for (thread = 0; thread < nthreads; thread++) { 270 for (cpu = 0; cpu < ncpus; cpu++) { 271 struct perf_counts_values *count; 272 273 count = perf_counts(counter->counts, cpu, thread); 274 275 /* 276 * The leader's group read loads data into its group members 277 * (via perf_evsel__read_counter) and sets threir count->loaded. 278 */ 279 if (!count->loaded && 280 perf_evsel__read_counter(counter, cpu, thread)) { 281 counter->counts->scaled = -1; 282 perf_counts(counter->counts, cpu, thread)->ena = 0; 283 perf_counts(counter->counts, cpu, thread)->run = 0; 284 return -1; 285 } 286 287 count->loaded = false; 288 289 if (STAT_RECORD) { 290 if (perf_evsel__write_stat_event(counter, cpu, thread, count)) { 291 pr_err("failed to write stat event\n"); 292 return -1; 293 } 294 } 295 296 if (verbose > 1) { 297 fprintf(stat_config.output, 298 "%s: %d: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n", 299 perf_evsel__name(counter), 300 cpu, 301 count->val, count->ena, count->run); 302 } 303 } 304 } 305 306 return 0; 307 } 308 309 static void read_counters(void) 310 { 311 struct perf_evsel *counter; 312 int ret; 313 314 evlist__for_each_entry(evsel_list, counter) { 315 ret = read_counter(counter); 316 if (ret) 317 pr_debug("failed to read counter %s\n", counter->name); 318 319 if (ret == 0 && perf_stat_process_counter(&stat_config, counter)) 320 pr_warning("failed to process counter %s\n", counter->name); 321 } 322 } 323 324 static void process_interval(void) 325 { 326 struct timespec ts, rs; 327 328 read_counters(); 329 330 clock_gettime(CLOCK_MONOTONIC, &ts); 331 diff_timespec(&rs, &ts, &ref_time); 332 333 if (STAT_RECORD) { 334 if (WRITE_STAT_ROUND_EVENT(rs.tv_sec * NSEC_PER_SEC + rs.tv_nsec, INTERVAL)) 335 pr_err("failed to write stat round event\n"); 336 } 337 338 init_stats(&walltime_nsecs_stats); 339 update_stats(&walltime_nsecs_stats, stat_config.interval * 1000000); 340 print_counters(&rs, 0, NULL); 341 } 342 343 static void enable_counters(void) 344 { 345 if (stat_config.initial_delay) 346 usleep(stat_config.initial_delay * USEC_PER_MSEC); 347 348 /* 349 * We need to enable counters only if: 350 * - we don't have tracee (attaching to task or cpu) 351 * - we have initial delay configured 352 */ 353 if (!target__none(&target) || stat_config.initial_delay) 354 perf_evlist__enable(evsel_list); 355 } 356 357 static void disable_counters(void) 358 { 359 /* 360 * If we don't have tracee (attaching to task or cpu), counters may 361 * still be running. To get accurate group ratios, we must stop groups 362 * from counting before reading their constituent counters. 363 */ 364 if (!target__none(&target)) 365 perf_evlist__disable(evsel_list); 366 } 367 368 static volatile int workload_exec_errno; 369 370 /* 371 * perf_evlist__prepare_workload will send a SIGUSR1 372 * if the fork fails, since we asked by setting its 373 * want_signal to true. 374 */ 375 static void workload_exec_failed_signal(int signo __maybe_unused, siginfo_t *info, 376 void *ucontext __maybe_unused) 377 { 378 workload_exec_errno = info->si_value.sival_int; 379 } 380 381 static bool perf_evsel__should_store_id(struct perf_evsel *counter) 382 { 383 return STAT_RECORD || counter->attr.read_format & PERF_FORMAT_ID; 384 } 385 386 static struct perf_evsel *perf_evsel__reset_weak_group(struct perf_evsel *evsel) 387 { 388 struct perf_evsel *c2, *leader; 389 bool is_open = true; 390 391 leader = evsel->leader; 392 pr_debug("Weak group for %s/%d failed\n", 393 leader->name, leader->nr_members); 394 395 /* 396 * for_each_group_member doesn't work here because it doesn't 397 * include the first entry. 398 */ 399 evlist__for_each_entry(evsel_list, c2) { 400 if (c2 == evsel) 401 is_open = false; 402 if (c2->leader == leader) { 403 if (is_open) 404 perf_evsel__close(c2); 405 c2->leader = c2; 406 c2->nr_members = 0; 407 } 408 } 409 return leader; 410 } 411 412 static bool is_target_alive(struct target *_target, 413 struct thread_map *threads) 414 { 415 struct stat st; 416 int i; 417 418 if (!target__has_task(_target)) 419 return true; 420 421 for (i = 0; i < threads->nr; i++) { 422 char path[PATH_MAX]; 423 424 scnprintf(path, PATH_MAX, "%s/%d", procfs__mountpoint(), 425 threads->map[i].pid); 426 427 if (!stat(path, &st)) 428 return true; 429 } 430 431 return false; 432 } 433 434 static int __run_perf_stat(int argc, const char **argv, int run_idx) 435 { 436 int interval = stat_config.interval; 437 int times = stat_config.times; 438 int timeout = stat_config.timeout; 439 char msg[BUFSIZ]; 440 unsigned long long t0, t1; 441 struct perf_evsel *counter; 442 struct timespec ts; 443 size_t l; 444 int status = 0; 445 const bool forks = (argc > 0); 446 bool is_pipe = STAT_RECORD ? perf_stat.data.is_pipe : false; 447 struct perf_evsel_config_term *err_term; 448 449 if (interval) { 450 ts.tv_sec = interval / USEC_PER_MSEC; 451 ts.tv_nsec = (interval % USEC_PER_MSEC) * NSEC_PER_MSEC; 452 } else if (timeout) { 453 ts.tv_sec = timeout / USEC_PER_MSEC; 454 ts.tv_nsec = (timeout % USEC_PER_MSEC) * NSEC_PER_MSEC; 455 } else { 456 ts.tv_sec = 1; 457 ts.tv_nsec = 0; 458 } 459 460 if (forks) { 461 if (perf_evlist__prepare_workload(evsel_list, &target, argv, is_pipe, 462 workload_exec_failed_signal) < 0) { 463 perror("failed to prepare workload"); 464 return -1; 465 } 466 child_pid = evsel_list->workload.pid; 467 } 468 469 if (group) 470 perf_evlist__set_leader(evsel_list); 471 472 evlist__for_each_entry(evsel_list, counter) { 473 try_again: 474 if (create_perf_stat_counter(counter, &stat_config, &target) < 0) { 475 476 /* Weak group failed. Reset the group. */ 477 if ((errno == EINVAL || errno == EBADF) && 478 counter->leader != counter && 479 counter->weak_group) { 480 counter = perf_evsel__reset_weak_group(counter); 481 goto try_again; 482 } 483 484 /* 485 * PPC returns ENXIO for HW counters until 2.6.37 486 * (behavior changed with commit b0a873e). 487 */ 488 if (errno == EINVAL || errno == ENOSYS || 489 errno == ENOENT || errno == EOPNOTSUPP || 490 errno == ENXIO) { 491 if (verbose > 0) 492 ui__warning("%s event is not supported by the kernel.\n", 493 perf_evsel__name(counter)); 494 counter->supported = false; 495 496 if ((counter->leader != counter) || 497 !(counter->leader->nr_members > 1)) 498 continue; 499 } else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) { 500 if (verbose > 0) 501 ui__warning("%s\n", msg); 502 goto try_again; 503 } else if (target__has_per_thread(&target) && 504 evsel_list->threads && 505 evsel_list->threads->err_thread != -1) { 506 /* 507 * For global --per-thread case, skip current 508 * error thread. 509 */ 510 if (!thread_map__remove(evsel_list->threads, 511 evsel_list->threads->err_thread)) { 512 evsel_list->threads->err_thread = -1; 513 goto try_again; 514 } 515 } 516 517 perf_evsel__open_strerror(counter, &target, 518 errno, msg, sizeof(msg)); 519 ui__error("%s\n", msg); 520 521 if (child_pid != -1) 522 kill(child_pid, SIGTERM); 523 524 return -1; 525 } 526 counter->supported = true; 527 528 l = strlen(counter->unit); 529 if (l > stat_config.unit_width) 530 stat_config.unit_width = l; 531 532 if (perf_evsel__should_store_id(counter) && 533 perf_evsel__store_ids(counter, evsel_list)) 534 return -1; 535 } 536 537 if (perf_evlist__apply_filters(evsel_list, &counter)) { 538 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n", 539 counter->filter, perf_evsel__name(counter), errno, 540 str_error_r(errno, msg, sizeof(msg))); 541 return -1; 542 } 543 544 if (perf_evlist__apply_drv_configs(evsel_list, &counter, &err_term)) { 545 pr_err("failed to set config \"%s\" on event %s with %d (%s)\n", 546 err_term->val.drv_cfg, perf_evsel__name(counter), errno, 547 str_error_r(errno, msg, sizeof(msg))); 548 return -1; 549 } 550 551 if (STAT_RECORD) { 552 int err, fd = perf_data__fd(&perf_stat.data); 553 554 if (is_pipe) { 555 err = perf_header__write_pipe(perf_data__fd(&perf_stat.data)); 556 } else { 557 err = perf_session__write_header(perf_stat.session, evsel_list, 558 fd, false); 559 } 560 561 if (err < 0) 562 return err; 563 564 err = perf_stat_synthesize_config(&stat_config, NULL, evsel_list, 565 process_synthesized_event, is_pipe); 566 if (err < 0) 567 return err; 568 } 569 570 /* 571 * Enable counters and exec the command: 572 */ 573 t0 = rdclock(); 574 clock_gettime(CLOCK_MONOTONIC, &ref_time); 575 576 if (forks) { 577 perf_evlist__start_workload(evsel_list); 578 enable_counters(); 579 580 if (interval || timeout) { 581 while (!waitpid(child_pid, &status, WNOHANG)) { 582 nanosleep(&ts, NULL); 583 if (timeout) 584 break; 585 process_interval(); 586 if (interval_count && !(--times)) 587 break; 588 } 589 } 590 wait4(child_pid, &status, 0, &stat_config.ru_data); 591 592 if (workload_exec_errno) { 593 const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg)); 594 pr_err("Workload failed: %s\n", emsg); 595 return -1; 596 } 597 598 if (WIFSIGNALED(status)) 599 psignal(WTERMSIG(status), argv[0]); 600 } else { 601 enable_counters(); 602 while (!done) { 603 nanosleep(&ts, NULL); 604 if (!is_target_alive(&target, evsel_list->threads)) 605 break; 606 if (timeout) 607 break; 608 if (interval) { 609 process_interval(); 610 if (interval_count && !(--times)) 611 break; 612 } 613 } 614 } 615 616 disable_counters(); 617 618 t1 = rdclock(); 619 620 if (stat_config.walltime_run_table) 621 stat_config.walltime_run[run_idx] = t1 - t0; 622 623 update_stats(&walltime_nsecs_stats, t1 - t0); 624 625 /* 626 * Closing a group leader splits the group, and as we only disable 627 * group leaders, results in remaining events becoming enabled. To 628 * avoid arbitrary skew, we must read all counters before closing any 629 * group leaders. 630 */ 631 read_counters(); 632 perf_evlist__close(evsel_list); 633 634 return WEXITSTATUS(status); 635 } 636 637 static int run_perf_stat(int argc, const char **argv, int run_idx) 638 { 639 int ret; 640 641 if (pre_cmd) { 642 ret = system(pre_cmd); 643 if (ret) 644 return ret; 645 } 646 647 if (sync_run) 648 sync(); 649 650 ret = __run_perf_stat(argc, argv, run_idx); 651 if (ret) 652 return ret; 653 654 if (post_cmd) { 655 ret = system(post_cmd); 656 if (ret) 657 return ret; 658 } 659 660 return ret; 661 } 662 663 static void print_counters(struct timespec *ts, int argc, const char **argv) 664 { 665 /* Do not print anything if we record to the pipe. */ 666 if (STAT_RECORD && perf_stat.data.is_pipe) 667 return; 668 669 perf_evlist__print_counters(evsel_list, &stat_config, &target, 670 ts, argc, argv); 671 } 672 673 static volatile int signr = -1; 674 675 static void skip_signal(int signo) 676 { 677 if ((child_pid == -1) || stat_config.interval) 678 done = 1; 679 680 signr = signo; 681 /* 682 * render child_pid harmless 683 * won't send SIGTERM to a random 684 * process in case of race condition 685 * and fast PID recycling 686 */ 687 child_pid = -1; 688 } 689 690 static void sig_atexit(void) 691 { 692 sigset_t set, oset; 693 694 /* 695 * avoid race condition with SIGCHLD handler 696 * in skip_signal() which is modifying child_pid 697 * goal is to avoid send SIGTERM to a random 698 * process 699 */ 700 sigemptyset(&set); 701 sigaddset(&set, SIGCHLD); 702 sigprocmask(SIG_BLOCK, &set, &oset); 703 704 if (child_pid != -1) 705 kill(child_pid, SIGTERM); 706 707 sigprocmask(SIG_SETMASK, &oset, NULL); 708 709 if (signr == -1) 710 return; 711 712 signal(signr, SIG_DFL); 713 kill(getpid(), signr); 714 } 715 716 static int stat__set_big_num(const struct option *opt __maybe_unused, 717 const char *s __maybe_unused, int unset) 718 { 719 big_num_opt = unset ? 0 : 1; 720 return 0; 721 } 722 723 static int enable_metric_only(const struct option *opt __maybe_unused, 724 const char *s __maybe_unused, int unset) 725 { 726 force_metric_only = true; 727 stat_config.metric_only = !unset; 728 return 0; 729 } 730 731 static int parse_metric_groups(const struct option *opt, 732 const char *str, 733 int unset __maybe_unused) 734 { 735 return metricgroup__parse_groups(opt, str, &stat_config.metric_events); 736 } 737 738 static const struct option stat_options[] = { 739 OPT_BOOLEAN('T', "transaction", &transaction_run, 740 "hardware transaction statistics"), 741 OPT_CALLBACK('e', "event", &evsel_list, "event", 742 "event selector. use 'perf list' to list available events", 743 parse_events_option), 744 OPT_CALLBACK(0, "filter", &evsel_list, "filter", 745 "event filter", parse_filter), 746 OPT_BOOLEAN('i', "no-inherit", &stat_config.no_inherit, 747 "child tasks do not inherit counters"), 748 OPT_STRING('p', "pid", &target.pid, "pid", 749 "stat events on existing process id"), 750 OPT_STRING('t', "tid", &target.tid, "tid", 751 "stat events on existing thread id"), 752 OPT_BOOLEAN('a', "all-cpus", &target.system_wide, 753 "system-wide collection from all CPUs"), 754 OPT_BOOLEAN('g', "group", &group, 755 "put the counters into a counter group"), 756 OPT_BOOLEAN('c', "scale", &stat_config.scale, "scale/normalize counters"), 757 OPT_INCR('v', "verbose", &verbose, 758 "be more verbose (show counter open errors, etc)"), 759 OPT_INTEGER('r', "repeat", &stat_config.run_count, 760 "repeat command and print average + stddev (max: 100, forever: 0)"), 761 OPT_BOOLEAN(0, "table", &stat_config.walltime_run_table, 762 "display details about each run (only with -r option)"), 763 OPT_BOOLEAN('n', "null", &stat_config.null_run, 764 "null run - dont start any counters"), 765 OPT_INCR('d', "detailed", &detailed_run, 766 "detailed run - start a lot of events"), 767 OPT_BOOLEAN('S', "sync", &sync_run, 768 "call sync() before starting a run"), 769 OPT_CALLBACK_NOOPT('B', "big-num", NULL, NULL, 770 "print large numbers with thousands\' separators", 771 stat__set_big_num), 772 OPT_STRING('C', "cpu", &target.cpu_list, "cpu", 773 "list of cpus to monitor in system-wide"), 774 OPT_SET_UINT('A', "no-aggr", &stat_config.aggr_mode, 775 "disable CPU count aggregation", AGGR_NONE), 776 OPT_BOOLEAN(0, "no-merge", &stat_config.no_merge, "Do not merge identical named events"), 777 OPT_STRING('x', "field-separator", &stat_config.csv_sep, "separator", 778 "print counts with custom separator"), 779 OPT_CALLBACK('G', "cgroup", &evsel_list, "name", 780 "monitor event in cgroup name only", parse_cgroups), 781 OPT_STRING('o', "output", &output_name, "file", "output file name"), 782 OPT_BOOLEAN(0, "append", &append_file, "append to the output file"), 783 OPT_INTEGER(0, "log-fd", &output_fd, 784 "log output to fd, instead of stderr"), 785 OPT_STRING(0, "pre", &pre_cmd, "command", 786 "command to run prior to the measured command"), 787 OPT_STRING(0, "post", &post_cmd, "command", 788 "command to run after to the measured command"), 789 OPT_UINTEGER('I', "interval-print", &stat_config.interval, 790 "print counts at regular interval in ms " 791 "(overhead is possible for values <= 100ms)"), 792 OPT_INTEGER(0, "interval-count", &stat_config.times, 793 "print counts for fixed number of times"), 794 OPT_BOOLEAN(0, "interval-clear", &stat_config.interval_clear, 795 "clear screen in between new interval"), 796 OPT_UINTEGER(0, "timeout", &stat_config.timeout, 797 "stop workload and print counts after a timeout period in ms (>= 10ms)"), 798 OPT_SET_UINT(0, "per-socket", &stat_config.aggr_mode, 799 "aggregate counts per processor socket", AGGR_SOCKET), 800 OPT_SET_UINT(0, "per-core", &stat_config.aggr_mode, 801 "aggregate counts per physical processor core", AGGR_CORE), 802 OPT_SET_UINT(0, "per-thread", &stat_config.aggr_mode, 803 "aggregate counts per thread", AGGR_THREAD), 804 OPT_UINTEGER('D', "delay", &stat_config.initial_delay, 805 "ms to wait before starting measurement after program start"), 806 OPT_CALLBACK_NOOPT(0, "metric-only", &stat_config.metric_only, NULL, 807 "Only print computed metrics. No raw values", enable_metric_only), 808 OPT_BOOLEAN(0, "topdown", &topdown_run, 809 "measure topdown level 1 statistics"), 810 OPT_BOOLEAN(0, "smi-cost", &smi_cost, 811 "measure SMI cost"), 812 OPT_CALLBACK('M', "metrics", &evsel_list, "metric/metric group list", 813 "monitor specified metrics or metric groups (separated by ,)", 814 parse_metric_groups), 815 OPT_END() 816 }; 817 818 static int perf_stat__get_socket(struct perf_stat_config *config __maybe_unused, 819 struct cpu_map *map, int cpu) 820 { 821 return cpu_map__get_socket(map, cpu, NULL); 822 } 823 824 static int perf_stat__get_core(struct perf_stat_config *config __maybe_unused, 825 struct cpu_map *map, int cpu) 826 { 827 return cpu_map__get_core(map, cpu, NULL); 828 } 829 830 static int cpu_map__get_max(struct cpu_map *map) 831 { 832 int i, max = -1; 833 834 for (i = 0; i < map->nr; i++) { 835 if (map->map[i] > max) 836 max = map->map[i]; 837 } 838 839 return max; 840 } 841 842 static int perf_stat__get_aggr(struct perf_stat_config *config, 843 aggr_get_id_t get_id, struct cpu_map *map, int idx) 844 { 845 int cpu; 846 847 if (idx >= map->nr) 848 return -1; 849 850 cpu = map->map[idx]; 851 852 if (config->cpus_aggr_map->map[cpu] == -1) 853 config->cpus_aggr_map->map[cpu] = get_id(config, map, idx); 854 855 return config->cpus_aggr_map->map[cpu]; 856 } 857 858 static int perf_stat__get_socket_cached(struct perf_stat_config *config, 859 struct cpu_map *map, int idx) 860 { 861 return perf_stat__get_aggr(config, perf_stat__get_socket, map, idx); 862 } 863 864 static int perf_stat__get_core_cached(struct perf_stat_config *config, 865 struct cpu_map *map, int idx) 866 { 867 return perf_stat__get_aggr(config, perf_stat__get_core, map, idx); 868 } 869 870 static int perf_stat_init_aggr_mode(void) 871 { 872 int nr; 873 874 switch (stat_config.aggr_mode) { 875 case AGGR_SOCKET: 876 if (cpu_map__build_socket_map(evsel_list->cpus, &stat_config.aggr_map)) { 877 perror("cannot build socket map"); 878 return -1; 879 } 880 stat_config.aggr_get_id = perf_stat__get_socket_cached; 881 break; 882 case AGGR_CORE: 883 if (cpu_map__build_core_map(evsel_list->cpus, &stat_config.aggr_map)) { 884 perror("cannot build core map"); 885 return -1; 886 } 887 stat_config.aggr_get_id = perf_stat__get_core_cached; 888 break; 889 case AGGR_NONE: 890 case AGGR_GLOBAL: 891 case AGGR_THREAD: 892 case AGGR_UNSET: 893 default: 894 break; 895 } 896 897 /* 898 * The evsel_list->cpus is the base we operate on, 899 * taking the highest cpu number to be the size of 900 * the aggregation translate cpumap. 901 */ 902 nr = cpu_map__get_max(evsel_list->cpus); 903 stat_config.cpus_aggr_map = cpu_map__empty_new(nr + 1); 904 return stat_config.cpus_aggr_map ? 0 : -ENOMEM; 905 } 906 907 static void perf_stat__exit_aggr_mode(void) 908 { 909 cpu_map__put(stat_config.aggr_map); 910 cpu_map__put(stat_config.cpus_aggr_map); 911 stat_config.aggr_map = NULL; 912 stat_config.cpus_aggr_map = NULL; 913 } 914 915 static inline int perf_env__get_cpu(struct perf_env *env, struct cpu_map *map, int idx) 916 { 917 int cpu; 918 919 if (idx > map->nr) 920 return -1; 921 922 cpu = map->map[idx]; 923 924 if (cpu >= env->nr_cpus_avail) 925 return -1; 926 927 return cpu; 928 } 929 930 static int perf_env__get_socket(struct cpu_map *map, int idx, void *data) 931 { 932 struct perf_env *env = data; 933 int cpu = perf_env__get_cpu(env, map, idx); 934 935 return cpu == -1 ? -1 : env->cpu[cpu].socket_id; 936 } 937 938 static int perf_env__get_core(struct cpu_map *map, int idx, void *data) 939 { 940 struct perf_env *env = data; 941 int core = -1, cpu = perf_env__get_cpu(env, map, idx); 942 943 if (cpu != -1) { 944 int socket_id = env->cpu[cpu].socket_id; 945 946 /* 947 * Encode socket in upper 16 bits 948 * core_id is relative to socket, and 949 * we need a global id. So we combine 950 * socket + core id. 951 */ 952 core = (socket_id << 16) | (env->cpu[cpu].core_id & 0xffff); 953 } 954 955 return core; 956 } 957 958 static int perf_env__build_socket_map(struct perf_env *env, struct cpu_map *cpus, 959 struct cpu_map **sockp) 960 { 961 return cpu_map__build_map(cpus, sockp, perf_env__get_socket, env); 962 } 963 964 static int perf_env__build_core_map(struct perf_env *env, struct cpu_map *cpus, 965 struct cpu_map **corep) 966 { 967 return cpu_map__build_map(cpus, corep, perf_env__get_core, env); 968 } 969 970 static int perf_stat__get_socket_file(struct perf_stat_config *config __maybe_unused, 971 struct cpu_map *map, int idx) 972 { 973 return perf_env__get_socket(map, idx, &perf_stat.session->header.env); 974 } 975 976 static int perf_stat__get_core_file(struct perf_stat_config *config __maybe_unused, 977 struct cpu_map *map, int idx) 978 { 979 return perf_env__get_core(map, idx, &perf_stat.session->header.env); 980 } 981 982 static int perf_stat_init_aggr_mode_file(struct perf_stat *st) 983 { 984 struct perf_env *env = &st->session->header.env; 985 986 switch (stat_config.aggr_mode) { 987 case AGGR_SOCKET: 988 if (perf_env__build_socket_map(env, evsel_list->cpus, &stat_config.aggr_map)) { 989 perror("cannot build socket map"); 990 return -1; 991 } 992 stat_config.aggr_get_id = perf_stat__get_socket_file; 993 break; 994 case AGGR_CORE: 995 if (perf_env__build_core_map(env, evsel_list->cpus, &stat_config.aggr_map)) { 996 perror("cannot build core map"); 997 return -1; 998 } 999 stat_config.aggr_get_id = perf_stat__get_core_file; 1000 break; 1001 case AGGR_NONE: 1002 case AGGR_GLOBAL: 1003 case AGGR_THREAD: 1004 case AGGR_UNSET: 1005 default: 1006 break; 1007 } 1008 1009 return 0; 1010 } 1011 1012 static int topdown_filter_events(const char **attr, char **str, bool use_group) 1013 { 1014 int off = 0; 1015 int i; 1016 int len = 0; 1017 char *s; 1018 1019 for (i = 0; attr[i]; i++) { 1020 if (pmu_have_event("cpu", attr[i])) { 1021 len += strlen(attr[i]) + 1; 1022 attr[i - off] = attr[i]; 1023 } else 1024 off++; 1025 } 1026 attr[i - off] = NULL; 1027 1028 *str = malloc(len + 1 + 2); 1029 if (!*str) 1030 return -1; 1031 s = *str; 1032 if (i - off == 0) { 1033 *s = 0; 1034 return 0; 1035 } 1036 if (use_group) 1037 *s++ = '{'; 1038 for (i = 0; attr[i]; i++) { 1039 strcpy(s, attr[i]); 1040 s += strlen(s); 1041 *s++ = ','; 1042 } 1043 if (use_group) { 1044 s[-1] = '}'; 1045 *s = 0; 1046 } else 1047 s[-1] = 0; 1048 return 0; 1049 } 1050 1051 __weak bool arch_topdown_check_group(bool *warn) 1052 { 1053 *warn = false; 1054 return false; 1055 } 1056 1057 __weak void arch_topdown_group_warn(void) 1058 { 1059 } 1060 1061 /* 1062 * Add default attributes, if there were no attributes specified or 1063 * if -d/--detailed, -d -d or -d -d -d is used: 1064 */ 1065 static int add_default_attributes(void) 1066 { 1067 int err; 1068 struct perf_event_attr default_attrs0[] = { 1069 1070 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_TASK_CLOCK }, 1071 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CONTEXT_SWITCHES }, 1072 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_CPU_MIGRATIONS }, 1073 { .type = PERF_TYPE_SOFTWARE, .config = PERF_COUNT_SW_PAGE_FAULTS }, 1074 1075 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_CPU_CYCLES }, 1076 }; 1077 struct perf_event_attr frontend_attrs[] = { 1078 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_FRONTEND }, 1079 }; 1080 struct perf_event_attr backend_attrs[] = { 1081 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_STALLED_CYCLES_BACKEND }, 1082 }; 1083 struct perf_event_attr default_attrs1[] = { 1084 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_INSTRUCTIONS }, 1085 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_INSTRUCTIONS }, 1086 { .type = PERF_TYPE_HARDWARE, .config = PERF_COUNT_HW_BRANCH_MISSES }, 1087 1088 }; 1089 1090 /* 1091 * Detailed stats (-d), covering the L1 and last level data caches: 1092 */ 1093 struct perf_event_attr detailed_attrs[] = { 1094 1095 { .type = PERF_TYPE_HW_CACHE, 1096 .config = 1097 PERF_COUNT_HW_CACHE_L1D << 0 | 1098 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1099 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1100 1101 { .type = PERF_TYPE_HW_CACHE, 1102 .config = 1103 PERF_COUNT_HW_CACHE_L1D << 0 | 1104 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1105 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1106 1107 { .type = PERF_TYPE_HW_CACHE, 1108 .config = 1109 PERF_COUNT_HW_CACHE_LL << 0 | 1110 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1111 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1112 1113 { .type = PERF_TYPE_HW_CACHE, 1114 .config = 1115 PERF_COUNT_HW_CACHE_LL << 0 | 1116 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1117 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1118 }; 1119 1120 /* 1121 * Very detailed stats (-d -d), covering the instruction cache and the TLB caches: 1122 */ 1123 struct perf_event_attr very_detailed_attrs[] = { 1124 1125 { .type = PERF_TYPE_HW_CACHE, 1126 .config = 1127 PERF_COUNT_HW_CACHE_L1I << 0 | 1128 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1129 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1130 1131 { .type = PERF_TYPE_HW_CACHE, 1132 .config = 1133 PERF_COUNT_HW_CACHE_L1I << 0 | 1134 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1135 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1136 1137 { .type = PERF_TYPE_HW_CACHE, 1138 .config = 1139 PERF_COUNT_HW_CACHE_DTLB << 0 | 1140 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1141 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1142 1143 { .type = PERF_TYPE_HW_CACHE, 1144 .config = 1145 PERF_COUNT_HW_CACHE_DTLB << 0 | 1146 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1147 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1148 1149 { .type = PERF_TYPE_HW_CACHE, 1150 .config = 1151 PERF_COUNT_HW_CACHE_ITLB << 0 | 1152 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1153 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1154 1155 { .type = PERF_TYPE_HW_CACHE, 1156 .config = 1157 PERF_COUNT_HW_CACHE_ITLB << 0 | 1158 (PERF_COUNT_HW_CACHE_OP_READ << 8) | 1159 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1160 1161 }; 1162 1163 /* 1164 * Very, very detailed stats (-d -d -d), adding prefetch events: 1165 */ 1166 struct perf_event_attr very_very_detailed_attrs[] = { 1167 1168 { .type = PERF_TYPE_HW_CACHE, 1169 .config = 1170 PERF_COUNT_HW_CACHE_L1D << 0 | 1171 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) | 1172 (PERF_COUNT_HW_CACHE_RESULT_ACCESS << 16) }, 1173 1174 { .type = PERF_TYPE_HW_CACHE, 1175 .config = 1176 PERF_COUNT_HW_CACHE_L1D << 0 | 1177 (PERF_COUNT_HW_CACHE_OP_PREFETCH << 8) | 1178 (PERF_COUNT_HW_CACHE_RESULT_MISS << 16) }, 1179 }; 1180 struct parse_events_error errinfo; 1181 1182 /* Set attrs if no event is selected and !null_run: */ 1183 if (stat_config.null_run) 1184 return 0; 1185 1186 if (transaction_run) { 1187 /* Handle -T as -M transaction. Once platform specific metrics 1188 * support has been added to the json files, all archictures 1189 * will use this approach. To determine transaction support 1190 * on an architecture test for such a metric name. 1191 */ 1192 if (metricgroup__has_metric("transaction")) { 1193 struct option opt = { .value = &evsel_list }; 1194 1195 return metricgroup__parse_groups(&opt, "transaction", 1196 &stat_config.metric_events); 1197 } 1198 1199 if (pmu_have_event("cpu", "cycles-ct") && 1200 pmu_have_event("cpu", "el-start")) 1201 err = parse_events(evsel_list, transaction_attrs, 1202 &errinfo); 1203 else 1204 err = parse_events(evsel_list, 1205 transaction_limited_attrs, 1206 &errinfo); 1207 if (err) { 1208 fprintf(stderr, "Cannot set up transaction events\n"); 1209 parse_events_print_error(&errinfo, transaction_attrs); 1210 return -1; 1211 } 1212 return 0; 1213 } 1214 1215 if (smi_cost) { 1216 int smi; 1217 1218 if (sysfs__read_int(FREEZE_ON_SMI_PATH, &smi) < 0) { 1219 fprintf(stderr, "freeze_on_smi is not supported.\n"); 1220 return -1; 1221 } 1222 1223 if (!smi) { 1224 if (sysfs__write_int(FREEZE_ON_SMI_PATH, 1) < 0) { 1225 fprintf(stderr, "Failed to set freeze_on_smi.\n"); 1226 return -1; 1227 } 1228 smi_reset = true; 1229 } 1230 1231 if (pmu_have_event("msr", "aperf") && 1232 pmu_have_event("msr", "smi")) { 1233 if (!force_metric_only) 1234 stat_config.metric_only = true; 1235 err = parse_events(evsel_list, smi_cost_attrs, &errinfo); 1236 } else { 1237 fprintf(stderr, "To measure SMI cost, it needs " 1238 "msr/aperf/, msr/smi/ and cpu/cycles/ support\n"); 1239 parse_events_print_error(&errinfo, smi_cost_attrs); 1240 return -1; 1241 } 1242 if (err) { 1243 fprintf(stderr, "Cannot set up SMI cost events\n"); 1244 return -1; 1245 } 1246 return 0; 1247 } 1248 1249 if (topdown_run) { 1250 char *str = NULL; 1251 bool warn = false; 1252 1253 if (stat_config.aggr_mode != AGGR_GLOBAL && 1254 stat_config.aggr_mode != AGGR_CORE) { 1255 pr_err("top down event configuration requires --per-core mode\n"); 1256 return -1; 1257 } 1258 stat_config.aggr_mode = AGGR_CORE; 1259 if (nr_cgroups || !target__has_cpu(&target)) { 1260 pr_err("top down event configuration requires system-wide mode (-a)\n"); 1261 return -1; 1262 } 1263 1264 if (!force_metric_only) 1265 stat_config.metric_only = true; 1266 if (topdown_filter_events(topdown_attrs, &str, 1267 arch_topdown_check_group(&warn)) < 0) { 1268 pr_err("Out of memory\n"); 1269 return -1; 1270 } 1271 if (topdown_attrs[0] && str) { 1272 if (warn) 1273 arch_topdown_group_warn(); 1274 err = parse_events(evsel_list, str, &errinfo); 1275 if (err) { 1276 fprintf(stderr, 1277 "Cannot set up top down events %s: %d\n", 1278 str, err); 1279 free(str); 1280 parse_events_print_error(&errinfo, str); 1281 return -1; 1282 } 1283 } else { 1284 fprintf(stderr, "System does not support topdown\n"); 1285 return -1; 1286 } 1287 free(str); 1288 } 1289 1290 if (!evsel_list->nr_entries) { 1291 if (target__has_cpu(&target)) 1292 default_attrs0[0].config = PERF_COUNT_SW_CPU_CLOCK; 1293 1294 if (perf_evlist__add_default_attrs(evsel_list, default_attrs0) < 0) 1295 return -1; 1296 if (pmu_have_event("cpu", "stalled-cycles-frontend")) { 1297 if (perf_evlist__add_default_attrs(evsel_list, 1298 frontend_attrs) < 0) 1299 return -1; 1300 } 1301 if (pmu_have_event("cpu", "stalled-cycles-backend")) { 1302 if (perf_evlist__add_default_attrs(evsel_list, 1303 backend_attrs) < 0) 1304 return -1; 1305 } 1306 if (perf_evlist__add_default_attrs(evsel_list, default_attrs1) < 0) 1307 return -1; 1308 } 1309 1310 /* Detailed events get appended to the event list: */ 1311 1312 if (detailed_run < 1) 1313 return 0; 1314 1315 /* Append detailed run extra attributes: */ 1316 if (perf_evlist__add_default_attrs(evsel_list, detailed_attrs) < 0) 1317 return -1; 1318 1319 if (detailed_run < 2) 1320 return 0; 1321 1322 /* Append very detailed run extra attributes: */ 1323 if (perf_evlist__add_default_attrs(evsel_list, very_detailed_attrs) < 0) 1324 return -1; 1325 1326 if (detailed_run < 3) 1327 return 0; 1328 1329 /* Append very, very detailed run extra attributes: */ 1330 return perf_evlist__add_default_attrs(evsel_list, very_very_detailed_attrs); 1331 } 1332 1333 static const char * const stat_record_usage[] = { 1334 "perf stat record [<options>]", 1335 NULL, 1336 }; 1337 1338 static void init_features(struct perf_session *session) 1339 { 1340 int feat; 1341 1342 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++) 1343 perf_header__set_feat(&session->header, feat); 1344 1345 perf_header__clear_feat(&session->header, HEADER_BUILD_ID); 1346 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA); 1347 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); 1348 perf_header__clear_feat(&session->header, HEADER_AUXTRACE); 1349 } 1350 1351 static int __cmd_record(int argc, const char **argv) 1352 { 1353 struct perf_session *session; 1354 struct perf_data *data = &perf_stat.data; 1355 1356 argc = parse_options(argc, argv, stat_options, stat_record_usage, 1357 PARSE_OPT_STOP_AT_NON_OPTION); 1358 1359 if (output_name) 1360 data->file.path = output_name; 1361 1362 if (stat_config.run_count != 1 || forever) { 1363 pr_err("Cannot use -r option with perf stat record.\n"); 1364 return -1; 1365 } 1366 1367 session = perf_session__new(data, false, NULL); 1368 if (session == NULL) { 1369 pr_err("Perf session creation failed.\n"); 1370 return -1; 1371 } 1372 1373 init_features(session); 1374 1375 session->evlist = evsel_list; 1376 perf_stat.session = session; 1377 perf_stat.record = true; 1378 return argc; 1379 } 1380 1381 static int process_stat_round_event(struct perf_session *session, 1382 union perf_event *event) 1383 { 1384 struct stat_round_event *stat_round = &event->stat_round; 1385 struct perf_evsel *counter; 1386 struct timespec tsh, *ts = NULL; 1387 const char **argv = session->header.env.cmdline_argv; 1388 int argc = session->header.env.nr_cmdline; 1389 1390 evlist__for_each_entry(evsel_list, counter) 1391 perf_stat_process_counter(&stat_config, counter); 1392 1393 if (stat_round->type == PERF_STAT_ROUND_TYPE__FINAL) 1394 update_stats(&walltime_nsecs_stats, stat_round->time); 1395 1396 if (stat_config.interval && stat_round->time) { 1397 tsh.tv_sec = stat_round->time / NSEC_PER_SEC; 1398 tsh.tv_nsec = stat_round->time % NSEC_PER_SEC; 1399 ts = &tsh; 1400 } 1401 1402 print_counters(ts, argc, argv); 1403 return 0; 1404 } 1405 1406 static 1407 int process_stat_config_event(struct perf_session *session, 1408 union perf_event *event) 1409 { 1410 struct perf_tool *tool = session->tool; 1411 struct perf_stat *st = container_of(tool, struct perf_stat, tool); 1412 1413 perf_event__read_stat_config(&stat_config, &event->stat_config); 1414 1415 if (cpu_map__empty(st->cpus)) { 1416 if (st->aggr_mode != AGGR_UNSET) 1417 pr_warning("warning: processing task data, aggregation mode not set\n"); 1418 return 0; 1419 } 1420 1421 if (st->aggr_mode != AGGR_UNSET) 1422 stat_config.aggr_mode = st->aggr_mode; 1423 1424 if (perf_stat.data.is_pipe) 1425 perf_stat_init_aggr_mode(); 1426 else 1427 perf_stat_init_aggr_mode_file(st); 1428 1429 return 0; 1430 } 1431 1432 static int set_maps(struct perf_stat *st) 1433 { 1434 if (!st->cpus || !st->threads) 1435 return 0; 1436 1437 if (WARN_ONCE(st->maps_allocated, "stats double allocation\n")) 1438 return -EINVAL; 1439 1440 perf_evlist__set_maps(evsel_list, st->cpus, st->threads); 1441 1442 if (perf_evlist__alloc_stats(evsel_list, true)) 1443 return -ENOMEM; 1444 1445 st->maps_allocated = true; 1446 return 0; 1447 } 1448 1449 static 1450 int process_thread_map_event(struct perf_session *session, 1451 union perf_event *event) 1452 { 1453 struct perf_tool *tool = session->tool; 1454 struct perf_stat *st = container_of(tool, struct perf_stat, tool); 1455 1456 if (st->threads) { 1457 pr_warning("Extra thread map event, ignoring.\n"); 1458 return 0; 1459 } 1460 1461 st->threads = thread_map__new_event(&event->thread_map); 1462 if (!st->threads) 1463 return -ENOMEM; 1464 1465 return set_maps(st); 1466 } 1467 1468 static 1469 int process_cpu_map_event(struct perf_session *session, 1470 union perf_event *event) 1471 { 1472 struct perf_tool *tool = session->tool; 1473 struct perf_stat *st = container_of(tool, struct perf_stat, tool); 1474 struct cpu_map *cpus; 1475 1476 if (st->cpus) { 1477 pr_warning("Extra cpu map event, ignoring.\n"); 1478 return 0; 1479 } 1480 1481 cpus = cpu_map__new_data(&event->cpu_map.data); 1482 if (!cpus) 1483 return -ENOMEM; 1484 1485 st->cpus = cpus; 1486 return set_maps(st); 1487 } 1488 1489 static int runtime_stat_new(struct perf_stat_config *config, int nthreads) 1490 { 1491 int i; 1492 1493 config->stats = calloc(nthreads, sizeof(struct runtime_stat)); 1494 if (!config->stats) 1495 return -1; 1496 1497 config->stats_num = nthreads; 1498 1499 for (i = 0; i < nthreads; i++) 1500 runtime_stat__init(&config->stats[i]); 1501 1502 return 0; 1503 } 1504 1505 static void runtime_stat_delete(struct perf_stat_config *config) 1506 { 1507 int i; 1508 1509 if (!config->stats) 1510 return; 1511 1512 for (i = 0; i < config->stats_num; i++) 1513 runtime_stat__exit(&config->stats[i]); 1514 1515 free(config->stats); 1516 } 1517 1518 static const char * const stat_report_usage[] = { 1519 "perf stat report [<options>]", 1520 NULL, 1521 }; 1522 1523 static struct perf_stat perf_stat = { 1524 .tool = { 1525 .attr = perf_event__process_attr, 1526 .event_update = perf_event__process_event_update, 1527 .thread_map = process_thread_map_event, 1528 .cpu_map = process_cpu_map_event, 1529 .stat_config = process_stat_config_event, 1530 .stat = perf_event__process_stat_event, 1531 .stat_round = process_stat_round_event, 1532 }, 1533 .aggr_mode = AGGR_UNSET, 1534 }; 1535 1536 static int __cmd_report(int argc, const char **argv) 1537 { 1538 struct perf_session *session; 1539 const struct option options[] = { 1540 OPT_STRING('i', "input", &input_name, "file", "input file name"), 1541 OPT_SET_UINT(0, "per-socket", &perf_stat.aggr_mode, 1542 "aggregate counts per processor socket", AGGR_SOCKET), 1543 OPT_SET_UINT(0, "per-core", &perf_stat.aggr_mode, 1544 "aggregate counts per physical processor core", AGGR_CORE), 1545 OPT_SET_UINT('A', "no-aggr", &perf_stat.aggr_mode, 1546 "disable CPU count aggregation", AGGR_NONE), 1547 OPT_END() 1548 }; 1549 struct stat st; 1550 int ret; 1551 1552 argc = parse_options(argc, argv, options, stat_report_usage, 0); 1553 1554 if (!input_name || !strlen(input_name)) { 1555 if (!fstat(STDIN_FILENO, &st) && S_ISFIFO(st.st_mode)) 1556 input_name = "-"; 1557 else 1558 input_name = "perf.data"; 1559 } 1560 1561 perf_stat.data.file.path = input_name; 1562 perf_stat.data.mode = PERF_DATA_MODE_READ; 1563 1564 session = perf_session__new(&perf_stat.data, false, &perf_stat.tool); 1565 if (session == NULL) 1566 return -1; 1567 1568 perf_stat.session = session; 1569 stat_config.output = stderr; 1570 evsel_list = session->evlist; 1571 1572 ret = perf_session__process_events(session); 1573 if (ret) 1574 return ret; 1575 1576 perf_session__delete(session); 1577 return 0; 1578 } 1579 1580 static void setup_system_wide(int forks) 1581 { 1582 /* 1583 * Make system wide (-a) the default target if 1584 * no target was specified and one of following 1585 * conditions is met: 1586 * 1587 * - there's no workload specified 1588 * - there is workload specified but all requested 1589 * events are system wide events 1590 */ 1591 if (!target__none(&target)) 1592 return; 1593 1594 if (!forks) 1595 target.system_wide = true; 1596 else { 1597 struct perf_evsel *counter; 1598 1599 evlist__for_each_entry(evsel_list, counter) { 1600 if (!counter->system_wide) 1601 return; 1602 } 1603 1604 if (evsel_list->nr_entries) 1605 target.system_wide = true; 1606 } 1607 } 1608 1609 int cmd_stat(int argc, const char **argv) 1610 { 1611 const char * const stat_usage[] = { 1612 "perf stat [<options>] [<command>]", 1613 NULL 1614 }; 1615 int status = -EINVAL, run_idx; 1616 const char *mode; 1617 FILE *output = stderr; 1618 unsigned int interval, timeout; 1619 const char * const stat_subcommands[] = { "record", "report" }; 1620 1621 setlocale(LC_ALL, ""); 1622 1623 evsel_list = perf_evlist__new(); 1624 if (evsel_list == NULL) 1625 return -ENOMEM; 1626 1627 parse_events__shrink_config_terms(); 1628 argc = parse_options_subcommand(argc, argv, stat_options, stat_subcommands, 1629 (const char **) stat_usage, 1630 PARSE_OPT_STOP_AT_NON_OPTION); 1631 perf_stat__collect_metric_expr(evsel_list); 1632 perf_stat__init_shadow_stats(); 1633 1634 if (stat_config.csv_sep) { 1635 stat_config.csv_output = true; 1636 if (!strcmp(stat_config.csv_sep, "\\t")) 1637 stat_config.csv_sep = "\t"; 1638 } else 1639 stat_config.csv_sep = DEFAULT_SEPARATOR; 1640 1641 if (argc && !strncmp(argv[0], "rec", 3)) { 1642 argc = __cmd_record(argc, argv); 1643 if (argc < 0) 1644 return -1; 1645 } else if (argc && !strncmp(argv[0], "rep", 3)) 1646 return __cmd_report(argc, argv); 1647 1648 interval = stat_config.interval; 1649 timeout = stat_config.timeout; 1650 1651 /* 1652 * For record command the -o is already taken care of. 1653 */ 1654 if (!STAT_RECORD && output_name && strcmp(output_name, "-")) 1655 output = NULL; 1656 1657 if (output_name && output_fd) { 1658 fprintf(stderr, "cannot use both --output and --log-fd\n"); 1659 parse_options_usage(stat_usage, stat_options, "o", 1); 1660 parse_options_usage(NULL, stat_options, "log-fd", 0); 1661 goto out; 1662 } 1663 1664 if (stat_config.metric_only && stat_config.aggr_mode == AGGR_THREAD) { 1665 fprintf(stderr, "--metric-only is not supported with --per-thread\n"); 1666 goto out; 1667 } 1668 1669 if (stat_config.metric_only && stat_config.run_count > 1) { 1670 fprintf(stderr, "--metric-only is not supported with -r\n"); 1671 goto out; 1672 } 1673 1674 if (stat_config.walltime_run_table && stat_config.run_count <= 1) { 1675 fprintf(stderr, "--table is only supported with -r\n"); 1676 parse_options_usage(stat_usage, stat_options, "r", 1); 1677 parse_options_usage(NULL, stat_options, "table", 0); 1678 goto out; 1679 } 1680 1681 if (output_fd < 0) { 1682 fprintf(stderr, "argument to --log-fd must be a > 0\n"); 1683 parse_options_usage(stat_usage, stat_options, "log-fd", 0); 1684 goto out; 1685 } 1686 1687 if (!output) { 1688 struct timespec tm; 1689 mode = append_file ? "a" : "w"; 1690 1691 output = fopen(output_name, mode); 1692 if (!output) { 1693 perror("failed to create output file"); 1694 return -1; 1695 } 1696 clock_gettime(CLOCK_REALTIME, &tm); 1697 fprintf(output, "# started on %s\n", ctime(&tm.tv_sec)); 1698 } else if (output_fd > 0) { 1699 mode = append_file ? "a" : "w"; 1700 output = fdopen(output_fd, mode); 1701 if (!output) { 1702 perror("Failed opening logfd"); 1703 return -errno; 1704 } 1705 } 1706 1707 stat_config.output = output; 1708 1709 /* 1710 * let the spreadsheet do the pretty-printing 1711 */ 1712 if (stat_config.csv_output) { 1713 /* User explicitly passed -B? */ 1714 if (big_num_opt == 1) { 1715 fprintf(stderr, "-B option not supported with -x\n"); 1716 parse_options_usage(stat_usage, stat_options, "B", 1); 1717 parse_options_usage(NULL, stat_options, "x", 1); 1718 goto out; 1719 } else /* Nope, so disable big number formatting */ 1720 stat_config.big_num = false; 1721 } else if (big_num_opt == 0) /* User passed --no-big-num */ 1722 stat_config.big_num = false; 1723 1724 setup_system_wide(argc); 1725 1726 /* 1727 * Display user/system times only for single 1728 * run and when there's specified tracee. 1729 */ 1730 if ((stat_config.run_count == 1) && target__none(&target)) 1731 stat_config.ru_display = true; 1732 1733 if (stat_config.run_count < 0) { 1734 pr_err("Run count must be a positive number\n"); 1735 parse_options_usage(stat_usage, stat_options, "r", 1); 1736 goto out; 1737 } else if (stat_config.run_count == 0) { 1738 forever = true; 1739 stat_config.run_count = 1; 1740 } 1741 1742 if (stat_config.walltime_run_table) { 1743 stat_config.walltime_run = zalloc(stat_config.run_count * sizeof(stat_config.walltime_run[0])); 1744 if (!stat_config.walltime_run) { 1745 pr_err("failed to setup -r option"); 1746 goto out; 1747 } 1748 } 1749 1750 if ((stat_config.aggr_mode == AGGR_THREAD) && 1751 !target__has_task(&target)) { 1752 if (!target.system_wide || target.cpu_list) { 1753 fprintf(stderr, "The --per-thread option is only " 1754 "available when monitoring via -p -t -a " 1755 "options or only --per-thread.\n"); 1756 parse_options_usage(NULL, stat_options, "p", 1); 1757 parse_options_usage(NULL, stat_options, "t", 1); 1758 goto out; 1759 } 1760 } 1761 1762 /* 1763 * no_aggr, cgroup are for system-wide only 1764 * --per-thread is aggregated per thread, we dont mix it with cpu mode 1765 */ 1766 if (((stat_config.aggr_mode != AGGR_GLOBAL && 1767 stat_config.aggr_mode != AGGR_THREAD) || nr_cgroups) && 1768 !target__has_cpu(&target)) { 1769 fprintf(stderr, "both cgroup and no-aggregation " 1770 "modes only available in system-wide mode\n"); 1771 1772 parse_options_usage(stat_usage, stat_options, "G", 1); 1773 parse_options_usage(NULL, stat_options, "A", 1); 1774 parse_options_usage(NULL, stat_options, "a", 1); 1775 goto out; 1776 } 1777 1778 if (add_default_attributes()) 1779 goto out; 1780 1781 target__validate(&target); 1782 1783 if ((stat_config.aggr_mode == AGGR_THREAD) && (target.system_wide)) 1784 target.per_thread = true; 1785 1786 if (perf_evlist__create_maps(evsel_list, &target) < 0) { 1787 if (target__has_task(&target)) { 1788 pr_err("Problems finding threads of monitor\n"); 1789 parse_options_usage(stat_usage, stat_options, "p", 1); 1790 parse_options_usage(NULL, stat_options, "t", 1); 1791 } else if (target__has_cpu(&target)) { 1792 perror("failed to parse CPUs map"); 1793 parse_options_usage(stat_usage, stat_options, "C", 1); 1794 parse_options_usage(NULL, stat_options, "a", 1); 1795 } 1796 goto out; 1797 } 1798 1799 /* 1800 * Initialize thread_map with comm names, 1801 * so we could print it out on output. 1802 */ 1803 if (stat_config.aggr_mode == AGGR_THREAD) { 1804 thread_map__read_comms(evsel_list->threads); 1805 if (target.system_wide) { 1806 if (runtime_stat_new(&stat_config, 1807 thread_map__nr(evsel_list->threads))) { 1808 goto out; 1809 } 1810 } 1811 } 1812 1813 if (stat_config.times && interval) 1814 interval_count = true; 1815 else if (stat_config.times && !interval) { 1816 pr_err("interval-count option should be used together with " 1817 "interval-print.\n"); 1818 parse_options_usage(stat_usage, stat_options, "interval-count", 0); 1819 parse_options_usage(stat_usage, stat_options, "I", 1); 1820 goto out; 1821 } 1822 1823 if (timeout && timeout < 100) { 1824 if (timeout < 10) { 1825 pr_err("timeout must be >= 10ms.\n"); 1826 parse_options_usage(stat_usage, stat_options, "timeout", 0); 1827 goto out; 1828 } else 1829 pr_warning("timeout < 100ms. " 1830 "The overhead percentage could be high in some cases. " 1831 "Please proceed with caution.\n"); 1832 } 1833 if (timeout && interval) { 1834 pr_err("timeout option is not supported with interval-print.\n"); 1835 parse_options_usage(stat_usage, stat_options, "timeout", 0); 1836 parse_options_usage(stat_usage, stat_options, "I", 1); 1837 goto out; 1838 } 1839 1840 if (perf_evlist__alloc_stats(evsel_list, interval)) 1841 goto out; 1842 1843 if (perf_stat_init_aggr_mode()) 1844 goto out; 1845 1846 /* 1847 * Set sample_type to PERF_SAMPLE_IDENTIFIER, which should be harmless 1848 * while avoiding that older tools show confusing messages. 1849 * 1850 * However for pipe sessions we need to keep it zero, 1851 * because script's perf_evsel__check_attr is triggered 1852 * by attr->sample_type != 0, and we can't run it on 1853 * stat sessions. 1854 */ 1855 stat_config.identifier = !(STAT_RECORD && perf_stat.data.is_pipe); 1856 1857 /* 1858 * We dont want to block the signals - that would cause 1859 * child tasks to inherit that and Ctrl-C would not work. 1860 * What we want is for Ctrl-C to work in the exec()-ed 1861 * task, but being ignored by perf stat itself: 1862 */ 1863 atexit(sig_atexit); 1864 if (!forever) 1865 signal(SIGINT, skip_signal); 1866 signal(SIGCHLD, skip_signal); 1867 signal(SIGALRM, skip_signal); 1868 signal(SIGABRT, skip_signal); 1869 1870 status = 0; 1871 for (run_idx = 0; forever || run_idx < stat_config.run_count; run_idx++) { 1872 if (stat_config.run_count != 1 && verbose > 0) 1873 fprintf(output, "[ perf stat: executing run #%d ... ]\n", 1874 run_idx + 1); 1875 1876 status = run_perf_stat(argc, argv, run_idx); 1877 if (forever && status != -1) { 1878 print_counters(NULL, argc, argv); 1879 perf_stat__reset_stats(); 1880 } 1881 } 1882 1883 if (!forever && status != -1 && !interval) 1884 print_counters(NULL, argc, argv); 1885 1886 if (STAT_RECORD) { 1887 /* 1888 * We synthesize the kernel mmap record just so that older tools 1889 * don't emit warnings about not being able to resolve symbols 1890 * due to /proc/sys/kernel/kptr_restrict settings and instear provide 1891 * a saner message about no samples being in the perf.data file. 1892 * 1893 * This also serves to suppress a warning about f_header.data.size == 0 1894 * in header.c at the moment 'perf stat record' gets introduced, which 1895 * is not really needed once we start adding the stat specific PERF_RECORD_ 1896 * records, but the need to suppress the kptr_restrict messages in older 1897 * tools remain -acme 1898 */ 1899 int fd = perf_data__fd(&perf_stat.data); 1900 int err = perf_event__synthesize_kernel_mmap((void *)&perf_stat, 1901 process_synthesized_event, 1902 &perf_stat.session->machines.host); 1903 if (err) { 1904 pr_warning("Couldn't synthesize the kernel mmap record, harmless, " 1905 "older tools may produce warnings about this file\n."); 1906 } 1907 1908 if (!interval) { 1909 if (WRITE_STAT_ROUND_EVENT(walltime_nsecs_stats.max, FINAL)) 1910 pr_err("failed to write stat round event\n"); 1911 } 1912 1913 if (!perf_stat.data.is_pipe) { 1914 perf_stat.session->header.data_size += perf_stat.bytes_written; 1915 perf_session__write_header(perf_stat.session, evsel_list, fd, true); 1916 } 1917 1918 perf_session__delete(perf_stat.session); 1919 } 1920 1921 perf_stat__exit_aggr_mode(); 1922 perf_evlist__free_stats(evsel_list); 1923 out: 1924 free(stat_config.walltime_run); 1925 1926 if (smi_cost && smi_reset) 1927 sysfs__write_int(FREEZE_ON_SMI_PATH, 0); 1928 1929 perf_evlist__delete(evsel_list); 1930 1931 runtime_stat_delete(&stat_config); 1932 1933 return status; 1934 } 1935