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