1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> 4 * 5 * Parts came from builtin-{top,stat,record}.c, see those files for further 6 * copyright notes. 7 */ 8 /* 9 * Powerpc needs __SANE_USERSPACE_TYPES__ before <linux/types.h> to select 10 * 'int-ll64.h' and avoid compile warnings when printing __u64 with %llu. 11 */ 12 #define __SANE_USERSPACE_TYPES__ 13 14 #include <byteswap.h> 15 #include <errno.h> 16 #include <inttypes.h> 17 #include <linux/bitops.h> 18 #include <api/fs/fs.h> 19 #include <api/fs/tracing_path.h> 20 #include <linux/hw_breakpoint.h> 21 #include <linux/perf_event.h> 22 #include <linux/compiler.h> 23 #include <linux/err.h> 24 #include <linux/zalloc.h> 25 #include <sys/ioctl.h> 26 #include <sys/resource.h> 27 #include <sys/syscall.h> 28 #include <sys/types.h> 29 #include <dirent.h> 30 #include <stdlib.h> 31 #include <perf/evsel.h> 32 #include "asm/bug.h" 33 #include "bpf_counter.h" 34 #include "callchain.h" 35 #include "cgroup.h" 36 #include "counts.h" 37 #include "event.h" 38 #include "evsel.h" 39 #include "time-utils.h" 40 #include "util/env.h" 41 #include "util/evsel_config.h" 42 #include "util/evsel_fprintf.h" 43 #include "evlist.h" 44 #include <perf/cpumap.h> 45 #include "thread_map.h" 46 #include "target.h" 47 #include "perf_regs.h" 48 #include "record.h" 49 #include "debug.h" 50 #include "trace-event.h" 51 #include "stat.h" 52 #include "string2.h" 53 #include "memswap.h" 54 #include "util.h" 55 #include "util/hashmap.h" 56 #include "off_cpu.h" 57 #include "pmu.h" 58 #include "pmus.h" 59 #include "drm_pmu.h" 60 #include "hwmon_pmu.h" 61 #include "tool_pmu.h" 62 #include "rlimit.h" 63 #include "../perf-sys.h" 64 #include "util/parse-branch-options.h" 65 #include "util/bpf-filter.h" 66 #include "util/hist.h" 67 #include <internal/xyarray.h> 68 #include <internal/lib.h> 69 #include <internal/threadmap.h> 70 #include "util/intel-tpebs.h" 71 72 #include <linux/ctype.h> 73 74 #ifdef HAVE_LIBTRACEEVENT 75 #include <event-parse.h> 76 #endif 77 78 struct perf_missing_features perf_missing_features; 79 80 static clockid_t clockid; 81 82 static int evsel__no_extra_init(struct evsel *evsel __maybe_unused) 83 { 84 return 0; 85 } 86 87 static bool test_attr__enabled(void) 88 { 89 static bool test_attr__enabled; 90 static bool test_attr__enabled_tested; 91 92 if (!test_attr__enabled_tested) { 93 char *dir = getenv("PERF_TEST_ATTR"); 94 95 test_attr__enabled = (dir != NULL); 96 test_attr__enabled_tested = true; 97 } 98 return test_attr__enabled; 99 } 100 101 #define __WRITE_ASS(str, fmt, data) \ 102 do { \ 103 if (fprintf(file, #str "=%"fmt "\n", data) < 0) { \ 104 perror("test attr - failed to write event file"); \ 105 fclose(file); \ 106 return -1; \ 107 } \ 108 } while (0) 109 110 #define WRITE_ASS(field, fmt) __WRITE_ASS(field, fmt, attr->field) 111 112 static int store_event(struct perf_event_attr *attr, pid_t pid, struct perf_cpu cpu, 113 int fd, int group_fd, unsigned long flags) 114 { 115 FILE *file; 116 char path[PATH_MAX]; 117 char *dir = getenv("PERF_TEST_ATTR"); 118 119 snprintf(path, PATH_MAX, "%s/event-%d-%llu-%d", dir, 120 attr->type, attr->config, fd); 121 122 file = fopen(path, "w+"); 123 if (!file) { 124 perror("test attr - failed to open event file"); 125 return -1; 126 } 127 128 if (fprintf(file, "[event-%d-%llu-%d]\n", 129 attr->type, attr->config, fd) < 0) { 130 perror("test attr - failed to write event file"); 131 fclose(file); 132 return -1; 133 } 134 135 /* syscall arguments */ 136 __WRITE_ASS(fd, "d", fd); 137 __WRITE_ASS(group_fd, "d", group_fd); 138 __WRITE_ASS(cpu, "d", cpu.cpu); 139 __WRITE_ASS(pid, "d", pid); 140 __WRITE_ASS(flags, "lu", flags); 141 142 /* struct perf_event_attr */ 143 WRITE_ASS(type, PRIu32); 144 WRITE_ASS(size, PRIu32); 145 WRITE_ASS(config, "llu"); 146 WRITE_ASS(sample_period, "llu"); 147 WRITE_ASS(sample_type, "llu"); 148 WRITE_ASS(read_format, "llu"); 149 WRITE_ASS(disabled, "d"); 150 WRITE_ASS(inherit, "d"); 151 WRITE_ASS(pinned, "d"); 152 WRITE_ASS(exclusive, "d"); 153 WRITE_ASS(exclude_user, "d"); 154 WRITE_ASS(exclude_kernel, "d"); 155 WRITE_ASS(exclude_hv, "d"); 156 WRITE_ASS(exclude_idle, "d"); 157 WRITE_ASS(mmap, "d"); 158 WRITE_ASS(comm, "d"); 159 WRITE_ASS(freq, "d"); 160 WRITE_ASS(inherit_stat, "d"); 161 WRITE_ASS(enable_on_exec, "d"); 162 WRITE_ASS(task, "d"); 163 WRITE_ASS(watermark, "d"); 164 WRITE_ASS(precise_ip, "d"); 165 WRITE_ASS(mmap_data, "d"); 166 WRITE_ASS(sample_id_all, "d"); 167 WRITE_ASS(exclude_host, "d"); 168 WRITE_ASS(exclude_guest, "d"); 169 WRITE_ASS(exclude_callchain_kernel, "d"); 170 WRITE_ASS(exclude_callchain_user, "d"); 171 WRITE_ASS(mmap2, "d"); 172 WRITE_ASS(comm_exec, "d"); 173 WRITE_ASS(context_switch, "d"); 174 WRITE_ASS(write_backward, "d"); 175 WRITE_ASS(namespaces, "d"); 176 WRITE_ASS(use_clockid, "d"); 177 WRITE_ASS(wakeup_events, PRIu32); 178 WRITE_ASS(bp_type, PRIu32); 179 WRITE_ASS(config1, "llu"); 180 WRITE_ASS(config2, "llu"); 181 WRITE_ASS(branch_sample_type, "llu"); 182 WRITE_ASS(sample_regs_user, "llu"); 183 WRITE_ASS(sample_stack_user, PRIu32); 184 185 fclose(file); 186 return 0; 187 } 188 189 #undef __WRITE_ASS 190 #undef WRITE_ASS 191 192 static void test_attr__open(struct perf_event_attr *attr, pid_t pid, struct perf_cpu cpu, 193 int fd, int group_fd, unsigned long flags) 194 { 195 int errno_saved = errno; 196 197 if ((fd != -1) && store_event(attr, pid, cpu, fd, group_fd, flags)) { 198 pr_err("test attr FAILED"); 199 exit(128); 200 } 201 202 errno = errno_saved; 203 } 204 205 static void evsel__no_extra_fini(struct evsel *evsel __maybe_unused) 206 { 207 } 208 209 static struct { 210 size_t size; 211 int (*init)(struct evsel *evsel); 212 void (*fini)(struct evsel *evsel); 213 } perf_evsel__object = { 214 .size = sizeof(struct evsel), 215 .init = evsel__no_extra_init, 216 .fini = evsel__no_extra_fini, 217 }; 218 219 int evsel__object_config(size_t object_size, int (*init)(struct evsel *evsel), 220 void (*fini)(struct evsel *evsel)) 221 { 222 223 if (object_size == 0) 224 goto set_methods; 225 226 if (perf_evsel__object.size > object_size) 227 return -EINVAL; 228 229 perf_evsel__object.size = object_size; 230 231 set_methods: 232 if (init != NULL) 233 perf_evsel__object.init = init; 234 235 if (fini != NULL) 236 perf_evsel__object.fini = fini; 237 238 return 0; 239 } 240 241 const char *evsel__pmu_name(const struct evsel *evsel) 242 { 243 struct perf_pmu *pmu = evsel__find_pmu(evsel); 244 245 if (pmu) 246 return pmu->name; 247 248 return event_type(evsel->core.attr.type); 249 } 250 251 #define FD(e, x, y) (*(int *)xyarray__entry(e->core.fd, x, y)) 252 253 int __evsel__sample_size(u64 sample_type) 254 { 255 u64 mask = sample_type & PERF_SAMPLE_MASK; 256 int size = 0; 257 int i; 258 259 for (i = 0; i < 64; i++) { 260 if (mask & (1ULL << i)) 261 size++; 262 } 263 264 size *= sizeof(u64); 265 266 return size; 267 } 268 269 /** 270 * __perf_evsel__calc_id_pos - calculate id_pos. 271 * @sample_type: sample type 272 * 273 * This function returns the position of the event id (PERF_SAMPLE_ID or 274 * PERF_SAMPLE_IDENTIFIER) in a sample event i.e. in the array of struct 275 * perf_record_sample. 276 */ 277 static int __perf_evsel__calc_id_pos(u64 sample_type) 278 { 279 int idx = 0; 280 281 if (sample_type & PERF_SAMPLE_IDENTIFIER) 282 return 0; 283 284 if (!(sample_type & PERF_SAMPLE_ID)) 285 return -1; 286 287 if (sample_type & PERF_SAMPLE_IP) 288 idx += 1; 289 290 if (sample_type & PERF_SAMPLE_TID) 291 idx += 1; 292 293 if (sample_type & PERF_SAMPLE_TIME) 294 idx += 1; 295 296 if (sample_type & PERF_SAMPLE_ADDR) 297 idx += 1; 298 299 return idx; 300 } 301 302 /** 303 * __perf_evsel__calc_is_pos - calculate is_pos. 304 * @sample_type: sample type 305 * 306 * This function returns the position (counting backwards) of the event id 307 * (PERF_SAMPLE_ID or PERF_SAMPLE_IDENTIFIER) in a non-sample event i.e. if 308 * sample_id_all is used there is an id sample appended to non-sample events. 309 */ 310 static int __perf_evsel__calc_is_pos(u64 sample_type) 311 { 312 int idx = 1; 313 314 if (sample_type & PERF_SAMPLE_IDENTIFIER) 315 return 1; 316 317 if (!(sample_type & PERF_SAMPLE_ID)) 318 return -1; 319 320 if (sample_type & PERF_SAMPLE_CPU) 321 idx += 1; 322 323 if (sample_type & PERF_SAMPLE_STREAM_ID) 324 idx += 1; 325 326 return idx; 327 } 328 329 void evsel__calc_id_pos(struct evsel *evsel) 330 { 331 evsel->id_pos = __perf_evsel__calc_id_pos(evsel->core.attr.sample_type); 332 evsel->is_pos = __perf_evsel__calc_is_pos(evsel->core.attr.sample_type); 333 } 334 335 void __evsel__set_sample_bit(struct evsel *evsel, 336 enum perf_event_sample_format bit) 337 { 338 if (!(evsel->core.attr.sample_type & bit)) { 339 evsel->core.attr.sample_type |= bit; 340 evsel->sample_size += sizeof(u64); 341 evsel__calc_id_pos(evsel); 342 } 343 } 344 345 void __evsel__reset_sample_bit(struct evsel *evsel, 346 enum perf_event_sample_format bit) 347 { 348 if (evsel->core.attr.sample_type & bit) { 349 evsel->core.attr.sample_type &= ~bit; 350 evsel->sample_size -= sizeof(u64); 351 evsel__calc_id_pos(evsel); 352 } 353 } 354 355 void evsel__set_sample_id(struct evsel *evsel, 356 bool can_sample_identifier) 357 { 358 if (can_sample_identifier) { 359 evsel__reset_sample_bit(evsel, ID); 360 evsel__set_sample_bit(evsel, IDENTIFIER); 361 } else { 362 evsel__set_sample_bit(evsel, ID); 363 } 364 evsel->core.attr.read_format |= PERF_FORMAT_ID; 365 } 366 367 /** 368 * evsel__is_function_event - Return whether given evsel is a function 369 * trace event 370 * 371 * @evsel - evsel selector to be tested 372 * 373 * Return %true if event is function trace event 374 */ 375 bool evsel__is_function_event(struct evsel *evsel) 376 { 377 #define FUNCTION_EVENT "ftrace:function" 378 379 return evsel->name && 380 !strncmp(FUNCTION_EVENT, evsel->name, sizeof(FUNCTION_EVENT)); 381 382 #undef FUNCTION_EVENT 383 } 384 385 void evsel__init(struct evsel *evsel, 386 struct perf_event_attr *attr, int idx) 387 { 388 perf_evsel__init(&evsel->core, attr, idx); 389 evsel->tracking = !idx; 390 evsel->unit = strdup(""); 391 evsel->scale = 1.0; 392 evsel->max_events = ULONG_MAX; 393 evsel->evlist = NULL; 394 evsel->bpf_obj = NULL; 395 evsel->bpf_fd = -1; 396 INIT_LIST_HEAD(&evsel->config_terms); 397 INIT_LIST_HEAD(&evsel->bpf_counter_list); 398 INIT_LIST_HEAD(&evsel->bpf_filters); 399 perf_evsel__object.init(evsel); 400 evsel->sample_size = __evsel__sample_size(attr->sample_type); 401 evsel__calc_id_pos(evsel); 402 evsel->cmdline_group_boundary = false; 403 evsel->metric_events = NULL; 404 evsel->per_pkg_mask = NULL; 405 evsel->collect_stat = false; 406 evsel->group_pmu_name = NULL; 407 evsel->skippable = false; 408 evsel->alternate_hw_config = PERF_COUNT_HW_MAX; 409 evsel->script_output_type = -1; // FIXME: OUTPUT_TYPE_UNSET, see builtin-script.c 410 } 411 412 struct evsel *evsel__new_idx(struct perf_event_attr *attr, int idx) 413 { 414 struct evsel *evsel = zalloc(perf_evsel__object.size); 415 416 if (!evsel) 417 return NULL; 418 evsel__init(evsel, attr, idx); 419 420 if (evsel__is_bpf_output(evsel) && !attr->sample_type) { 421 evsel->core.attr.sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | 422 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD), 423 evsel->core.attr.sample_period = 1; 424 } 425 426 if (evsel__is_clock(evsel)) { 427 free((char *)evsel->unit); 428 evsel->unit = strdup("msec"); 429 evsel->scale = 1e-6; 430 } 431 432 return evsel; 433 } 434 435 int copy_config_terms(struct list_head *dst, struct list_head *src) 436 { 437 struct evsel_config_term *pos, *tmp; 438 439 list_for_each_entry(pos, src, list) { 440 tmp = malloc(sizeof(*tmp)); 441 if (tmp == NULL) 442 return -ENOMEM; 443 444 *tmp = *pos; 445 if (tmp->free_str) { 446 tmp->val.str = strdup(pos->val.str); 447 if (tmp->val.str == NULL) { 448 free(tmp); 449 return -ENOMEM; 450 } 451 } 452 list_add_tail(&tmp->list, dst); 453 } 454 return 0; 455 } 456 457 static int evsel__copy_config_terms(struct evsel *dst, struct evsel *src) 458 { 459 return copy_config_terms(&dst->config_terms, &src->config_terms); 460 } 461 462 /** 463 * evsel__clone - create a new evsel copied from @orig 464 * @orig: original evsel 465 * 466 * The assumption is that @orig is not configured nor opened yet. 467 * So we only care about the attributes that can be set while it's parsed. 468 */ 469 struct evsel *evsel__clone(struct evsel *dest, struct evsel *orig) 470 { 471 struct evsel *evsel; 472 473 BUG_ON(orig->core.fd); 474 BUG_ON(orig->counts); 475 BUG_ON(orig->priv); 476 BUG_ON(orig->per_pkg_mask); 477 478 /* cannot handle BPF objects for now */ 479 if (orig->bpf_obj) 480 return NULL; 481 482 if (dest) 483 evsel = dest; 484 else 485 evsel = evsel__new(&orig->core.attr); 486 487 if (evsel == NULL) 488 return NULL; 489 490 evsel->core.cpus = perf_cpu_map__get(orig->core.cpus); 491 evsel->core.pmu_cpus = perf_cpu_map__get(orig->core.pmu_cpus); 492 evsel->core.threads = perf_thread_map__get(orig->core.threads); 493 evsel->core.nr_members = orig->core.nr_members; 494 evsel->core.system_wide = orig->core.system_wide; 495 evsel->core.requires_cpu = orig->core.requires_cpu; 496 evsel->core.is_pmu_core = orig->core.is_pmu_core; 497 498 if (orig->name) { 499 evsel->name = strdup(orig->name); 500 if (evsel->name == NULL) 501 goto out_err; 502 } 503 if (orig->group_name) { 504 evsel->group_name = strdup(orig->group_name); 505 if (evsel->group_name == NULL) 506 goto out_err; 507 } 508 if (orig->group_pmu_name) { 509 evsel->group_pmu_name = strdup(orig->group_pmu_name); 510 if (evsel->group_pmu_name == NULL) 511 goto out_err; 512 } 513 if (orig->filter) { 514 evsel->filter = strdup(orig->filter); 515 if (evsel->filter == NULL) 516 goto out_err; 517 } 518 if (orig->metric_id) { 519 evsel->metric_id = strdup(orig->metric_id); 520 if (evsel->metric_id == NULL) 521 goto out_err; 522 } 523 evsel->cgrp = cgroup__get(orig->cgrp); 524 #ifdef HAVE_LIBTRACEEVENT 525 if (orig->tp_sys) { 526 evsel->tp_sys = strdup(orig->tp_sys); 527 if (evsel->tp_sys == NULL) 528 goto out_err; 529 } 530 if (orig->tp_name) { 531 evsel->tp_name = strdup(orig->tp_name); 532 if (evsel->tp_name == NULL) 533 goto out_err; 534 } 535 evsel->tp_format = orig->tp_format; 536 #endif 537 evsel->handler = orig->handler; 538 evsel->core.leader = orig->core.leader; 539 540 evsel->max_events = orig->max_events; 541 zfree(&evsel->unit); 542 if (orig->unit) { 543 evsel->unit = strdup(orig->unit); 544 if (evsel->unit == NULL) 545 goto out_err; 546 } 547 evsel->scale = orig->scale; 548 evsel->snapshot = orig->snapshot; 549 evsel->per_pkg = orig->per_pkg; 550 evsel->percore = orig->percore; 551 evsel->precise_max = orig->precise_max; 552 evsel->is_libpfm_event = orig->is_libpfm_event; 553 554 evsel->exclude_GH = orig->exclude_GH; 555 evsel->sample_read = orig->sample_read; 556 evsel->collect_stat = orig->collect_stat; 557 evsel->weak_group = orig->weak_group; 558 evsel->use_config_name = orig->use_config_name; 559 evsel->pmu = orig->pmu; 560 evsel->first_wildcard_match = orig->first_wildcard_match; 561 562 if (evsel__copy_config_terms(evsel, orig) < 0) 563 goto out_err; 564 565 evsel->alternate_hw_config = orig->alternate_hw_config; 566 567 return evsel; 568 569 out_err: 570 evsel__delete(evsel); 571 return NULL; 572 } 573 574 static int trace_event__id(const char *sys, const char *name) 575 { 576 char *tp_dir = get_events_file(sys); 577 char path[PATH_MAX]; 578 int id, err; 579 580 if (!tp_dir) 581 return -1; 582 583 scnprintf(path, PATH_MAX, "%s/%s/id", tp_dir, name); 584 put_events_file(tp_dir); 585 err = filename__read_int(path, &id); 586 if (err) 587 return err; 588 589 return id; 590 } 591 592 /* 593 * Returns pointer with encoded error via <linux/err.h> interface. 594 */ 595 struct evsel *evsel__newtp_idx(const char *sys, const char *name, int idx, bool format) 596 { 597 struct perf_event_attr attr = { 598 .type = PERF_TYPE_TRACEPOINT, 599 .sample_type = (PERF_SAMPLE_RAW | PERF_SAMPLE_TIME | 600 PERF_SAMPLE_CPU | PERF_SAMPLE_PERIOD), 601 }; 602 struct evsel *evsel = zalloc(perf_evsel__object.size); 603 int err = -ENOMEM, id = -1; 604 605 if (evsel == NULL) 606 goto out_err; 607 608 609 if (asprintf(&evsel->name, "%s:%s", sys, name) < 0) 610 goto out_free; 611 612 #ifdef HAVE_LIBTRACEEVENT 613 evsel->tp_sys = strdup(sys); 614 if (!evsel->tp_sys) 615 goto out_free; 616 617 evsel->tp_name = strdup(name); 618 if (!evsel->tp_name) 619 goto out_free; 620 #endif 621 622 event_attr_init(&attr); 623 624 if (format) { 625 id = trace_event__id(sys, name); 626 if (id < 0) { 627 err = id; 628 goto out_free; 629 } 630 } 631 attr.config = (__u64)id; 632 attr.sample_period = 1; 633 evsel__init(evsel, &attr, idx); 634 return evsel; 635 636 out_free: 637 zfree(&evsel->name); 638 #ifdef HAVE_LIBTRACEEVENT 639 zfree(&evsel->tp_sys); 640 zfree(&evsel->tp_name); 641 #endif 642 free(evsel); 643 out_err: 644 return ERR_PTR(err); 645 } 646 647 #ifdef HAVE_LIBTRACEEVENT 648 struct tep_event *evsel__tp_format(struct evsel *evsel) 649 { 650 struct tep_event *tp_format = evsel->tp_format; 651 652 if (tp_format) 653 return tp_format; 654 655 if (evsel->core.attr.type != PERF_TYPE_TRACEPOINT) 656 return NULL; 657 658 if (!evsel->tp_sys) 659 tp_format = trace_event__tp_format_id(evsel->core.attr.config); 660 else 661 tp_format = trace_event__tp_format(evsel->tp_sys, evsel->tp_name); 662 663 if (IS_ERR(tp_format)) { 664 int err = -PTR_ERR(evsel->tp_format); 665 666 pr_err("Error getting tracepoint format '%s' '%s'(%d)\n", 667 evsel__name(evsel), strerror(err), err); 668 return NULL; 669 } 670 evsel->tp_format = tp_format; 671 return evsel->tp_format; 672 } 673 #endif 674 675 const char *const evsel__hw_names[PERF_COUNT_HW_MAX] = { 676 "cycles", 677 "instructions", 678 "cache-references", 679 "cache-misses", 680 "branches", 681 "branch-misses", 682 "bus-cycles", 683 "stalled-cycles-frontend", 684 "stalled-cycles-backend", 685 "ref-cycles", 686 }; 687 688 char *evsel__bpf_counter_events; 689 690 bool evsel__match_bpf_counter_events(const char *name) 691 { 692 int name_len; 693 bool match; 694 char *ptr; 695 696 if (!evsel__bpf_counter_events) 697 return false; 698 699 ptr = strstr(evsel__bpf_counter_events, name); 700 name_len = strlen(name); 701 702 /* check name matches a full token in evsel__bpf_counter_events */ 703 match = (ptr != NULL) && 704 ((ptr == evsel__bpf_counter_events) || (*(ptr - 1) == ',')) && 705 ((*(ptr + name_len) == ',') || (*(ptr + name_len) == '\0')); 706 707 return match; 708 } 709 710 static const char *__evsel__hw_name(u64 config) 711 { 712 if (config < PERF_COUNT_HW_MAX && evsel__hw_names[config]) 713 return evsel__hw_names[config]; 714 715 return "unknown-hardware"; 716 } 717 718 static int evsel__add_modifiers(struct evsel *evsel, char *bf, size_t size) 719 { 720 int colon = 0, r = 0; 721 struct perf_event_attr *attr = &evsel->core.attr; 722 723 #define MOD_PRINT(context, mod) do { \ 724 if (!attr->exclude_##context) { \ 725 if (!colon) colon = ++r; \ 726 r += scnprintf(bf + r, size - r, "%c", mod); \ 727 } } while(0) 728 729 if (attr->exclude_kernel || attr->exclude_user || attr->exclude_hv) { 730 MOD_PRINT(kernel, 'k'); 731 MOD_PRINT(user, 'u'); 732 MOD_PRINT(hv, 'h'); 733 } 734 735 if (attr->precise_ip) { 736 if (!colon) 737 colon = ++r; 738 r += scnprintf(bf + r, size - r, "%.*s", attr->precise_ip, "ppp"); 739 } 740 741 if (attr->exclude_host || attr->exclude_guest) { 742 MOD_PRINT(host, 'H'); 743 MOD_PRINT(guest, 'G'); 744 } 745 #undef MOD_PRINT 746 if (colon) 747 bf[colon - 1] = ':'; 748 return r; 749 } 750 751 int __weak arch_evsel__hw_name(struct evsel *evsel, char *bf, size_t size) 752 { 753 return scnprintf(bf, size, "%s", __evsel__hw_name(evsel->core.attr.config)); 754 } 755 756 static int evsel__hw_name(struct evsel *evsel, char *bf, size_t size) 757 { 758 int r = arch_evsel__hw_name(evsel, bf, size); 759 return r + evsel__add_modifiers(evsel, bf + r, size - r); 760 } 761 762 const char *const evsel__sw_names[PERF_COUNT_SW_MAX] = { 763 "cpu-clock", 764 "task-clock", 765 "page-faults", 766 "context-switches", 767 "cpu-migrations", 768 "minor-faults", 769 "major-faults", 770 "alignment-faults", 771 "emulation-faults", 772 "dummy", 773 }; 774 775 static const char *__evsel__sw_name(u64 config) 776 { 777 if (config < PERF_COUNT_SW_MAX && evsel__sw_names[config]) 778 return evsel__sw_names[config]; 779 return "unknown-software"; 780 } 781 782 static int evsel__sw_name(struct evsel *evsel, char *bf, size_t size) 783 { 784 int r = scnprintf(bf, size, "%s", __evsel__sw_name(evsel->core.attr.config)); 785 return r + evsel__add_modifiers(evsel, bf + r, size - r); 786 } 787 788 static int __evsel__bp_name(char *bf, size_t size, u64 addr, u64 type) 789 { 790 int r; 791 792 r = scnprintf(bf, size, "mem:0x%" PRIx64 ":", addr); 793 794 if (type & HW_BREAKPOINT_R) 795 r += scnprintf(bf + r, size - r, "r"); 796 797 if (type & HW_BREAKPOINT_W) 798 r += scnprintf(bf + r, size - r, "w"); 799 800 if (type & HW_BREAKPOINT_X) 801 r += scnprintf(bf + r, size - r, "x"); 802 803 return r; 804 } 805 806 static int evsel__bp_name(struct evsel *evsel, char *bf, size_t size) 807 { 808 struct perf_event_attr *attr = &evsel->core.attr; 809 int r = __evsel__bp_name(bf, size, attr->bp_addr, attr->bp_type); 810 return r + evsel__add_modifiers(evsel, bf + r, size - r); 811 } 812 813 const char *const evsel__hw_cache[PERF_COUNT_HW_CACHE_MAX][EVSEL__MAX_ALIASES] = { 814 { "L1-dcache", "l1-d", "l1d", "L1-data", }, 815 { "L1-icache", "l1-i", "l1i", "L1-instruction", }, 816 { "LLC", "L2", }, 817 { "dTLB", "d-tlb", "Data-TLB", }, 818 { "iTLB", "i-tlb", "Instruction-TLB", }, 819 { "branch", "branches", "bpu", "btb", "bpc", }, 820 { "node", }, 821 }; 822 823 const char *const evsel__hw_cache_op[PERF_COUNT_HW_CACHE_OP_MAX][EVSEL__MAX_ALIASES] = { 824 { "load", "loads", "read", }, 825 { "store", "stores", "write", }, 826 { "prefetch", "prefetches", "speculative-read", "speculative-load", }, 827 }; 828 829 const char *const evsel__hw_cache_result[PERF_COUNT_HW_CACHE_RESULT_MAX][EVSEL__MAX_ALIASES] = { 830 { "refs", "Reference", "ops", "access", }, 831 { "misses", "miss", }, 832 }; 833 834 #define C(x) PERF_COUNT_HW_CACHE_##x 835 #define CACHE_READ (1 << C(OP_READ)) 836 #define CACHE_WRITE (1 << C(OP_WRITE)) 837 #define CACHE_PREFETCH (1 << C(OP_PREFETCH)) 838 #define COP(x) (1 << x) 839 840 /* 841 * cache operation stat 842 * L1I : Read and prefetch only 843 * ITLB and BPU : Read-only 844 */ 845 static const unsigned long evsel__hw_cache_stat[C(MAX)] = { 846 [C(L1D)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), 847 [C(L1I)] = (CACHE_READ | CACHE_PREFETCH), 848 [C(LL)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), 849 [C(DTLB)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), 850 [C(ITLB)] = (CACHE_READ), 851 [C(BPU)] = (CACHE_READ), 852 [C(NODE)] = (CACHE_READ | CACHE_WRITE | CACHE_PREFETCH), 853 }; 854 855 bool evsel__is_cache_op_valid(u8 type, u8 op) 856 { 857 if (evsel__hw_cache_stat[type] & COP(op)) 858 return true; /* valid */ 859 else 860 return false; /* invalid */ 861 } 862 863 int __evsel__hw_cache_type_op_res_name(u8 type, u8 op, u8 result, char *bf, size_t size) 864 { 865 if (result) { 866 return scnprintf(bf, size, "%s-%s-%s", evsel__hw_cache[type][0], 867 evsel__hw_cache_op[op][0], 868 evsel__hw_cache_result[result][0]); 869 } 870 871 return scnprintf(bf, size, "%s-%s", evsel__hw_cache[type][0], 872 evsel__hw_cache_op[op][1]); 873 } 874 875 static int __evsel__hw_cache_name(u64 config, char *bf, size_t size) 876 { 877 u8 op, result, type = (config >> 0) & 0xff; 878 const char *err = "unknown-ext-hardware-cache-type"; 879 880 if (type >= PERF_COUNT_HW_CACHE_MAX) 881 goto out_err; 882 883 op = (config >> 8) & 0xff; 884 err = "unknown-ext-hardware-cache-op"; 885 if (op >= PERF_COUNT_HW_CACHE_OP_MAX) 886 goto out_err; 887 888 result = (config >> 16) & 0xff; 889 err = "unknown-ext-hardware-cache-result"; 890 if (result >= PERF_COUNT_HW_CACHE_RESULT_MAX) 891 goto out_err; 892 893 err = "invalid-cache"; 894 if (!evsel__is_cache_op_valid(type, op)) 895 goto out_err; 896 897 return __evsel__hw_cache_type_op_res_name(type, op, result, bf, size); 898 out_err: 899 return scnprintf(bf, size, "%s", err); 900 } 901 902 static int evsel__hw_cache_name(struct evsel *evsel, char *bf, size_t size) 903 { 904 int ret = __evsel__hw_cache_name(evsel->core.attr.config, bf, size); 905 return ret + evsel__add_modifiers(evsel, bf + ret, size - ret); 906 } 907 908 static int evsel__raw_name(struct evsel *evsel, char *bf, size_t size) 909 { 910 int ret = scnprintf(bf, size, "raw 0x%" PRIx64, evsel->core.attr.config); 911 return ret + evsel__add_modifiers(evsel, bf + ret, size - ret); 912 } 913 914 const char *evsel__name(struct evsel *evsel) 915 { 916 char bf[128]; 917 918 if (!evsel) 919 goto out_unknown; 920 921 if (evsel->name) 922 return evsel->name; 923 924 switch (evsel->core.attr.type) { 925 case PERF_TYPE_RAW: 926 evsel__raw_name(evsel, bf, sizeof(bf)); 927 break; 928 929 case PERF_TYPE_HARDWARE: 930 evsel__hw_name(evsel, bf, sizeof(bf)); 931 break; 932 933 case PERF_TYPE_HW_CACHE: 934 evsel__hw_cache_name(evsel, bf, sizeof(bf)); 935 break; 936 937 case PERF_TYPE_SOFTWARE: 938 evsel__sw_name(evsel, bf, sizeof(bf)); 939 break; 940 941 case PERF_TYPE_TRACEPOINT: 942 scnprintf(bf, sizeof(bf), "%s", "unknown tracepoint"); 943 break; 944 945 case PERF_TYPE_BREAKPOINT: 946 evsel__bp_name(evsel, bf, sizeof(bf)); 947 break; 948 949 case PERF_PMU_TYPE_TOOL: 950 scnprintf(bf, sizeof(bf), "%s", evsel__tool_pmu_event_name(evsel)); 951 break; 952 953 default: 954 scnprintf(bf, sizeof(bf), "unknown attr type: %d", 955 evsel->core.attr.type); 956 break; 957 } 958 959 evsel->name = strdup(bf); 960 961 if (evsel->name) 962 return evsel->name; 963 out_unknown: 964 return "unknown"; 965 } 966 967 bool evsel__name_is(struct evsel *evsel, const char *name) 968 { 969 return !strcmp(evsel__name(evsel), name); 970 } 971 972 const char *evsel__metric_id(const struct evsel *evsel) 973 { 974 if (evsel->metric_id) 975 return evsel->metric_id; 976 977 if (evsel__is_tool(evsel)) 978 return evsel__tool_pmu_event_name(evsel); 979 980 return "unknown"; 981 } 982 983 const char *evsel__group_name(struct evsel *evsel) 984 { 985 return evsel->group_name ?: "anon group"; 986 } 987 988 /* 989 * Returns the group details for the specified leader, 990 * with following rules. 991 * 992 * For record -e '{cycles,instructions}' 993 * 'anon group { cycles:u, instructions:u }' 994 * 995 * For record -e 'cycles,instructions' and report --group 996 * 'cycles:u, instructions:u' 997 */ 998 int evsel__group_desc(struct evsel *evsel, char *buf, size_t size) 999 { 1000 int ret = 0; 1001 bool first = true; 1002 struct evsel *pos; 1003 const char *group_name = evsel__group_name(evsel); 1004 1005 if (!evsel->forced_leader) 1006 ret = scnprintf(buf, size, "%s { ", group_name); 1007 1008 for_each_group_evsel(pos, evsel) { 1009 if (symbol_conf.skip_empty && 1010 evsel__hists(pos)->stats.nr_samples == 0) 1011 continue; 1012 1013 ret += scnprintf(buf + ret, size - ret, "%s%s", 1014 first ? "" : ", ", evsel__name(pos)); 1015 first = false; 1016 } 1017 1018 if (!evsel->forced_leader) 1019 ret += scnprintf(buf + ret, size - ret, " }"); 1020 1021 return ret; 1022 } 1023 1024 static void __evsel__config_callchain(struct evsel *evsel, struct record_opts *opts, 1025 struct callchain_param *param) 1026 { 1027 bool function = evsel__is_function_event(evsel); 1028 struct perf_event_attr *attr = &evsel->core.attr; 1029 1030 evsel__set_sample_bit(evsel, CALLCHAIN); 1031 1032 attr->sample_max_stack = param->max_stack; 1033 1034 if (opts->kernel_callchains) 1035 attr->exclude_callchain_user = 1; 1036 if (opts->user_callchains) 1037 attr->exclude_callchain_kernel = 1; 1038 if (param->record_mode == CALLCHAIN_LBR) { 1039 if (!opts->branch_stack) { 1040 if (attr->exclude_user) { 1041 pr_warning("LBR callstack option is only available " 1042 "to get user callchain information. " 1043 "Falling back to framepointers.\n"); 1044 } else { 1045 evsel__set_sample_bit(evsel, BRANCH_STACK); 1046 attr->branch_sample_type = PERF_SAMPLE_BRANCH_USER | 1047 PERF_SAMPLE_BRANCH_CALL_STACK | 1048 PERF_SAMPLE_BRANCH_NO_CYCLES | 1049 PERF_SAMPLE_BRANCH_NO_FLAGS | 1050 PERF_SAMPLE_BRANCH_HW_INDEX; 1051 } 1052 } else 1053 pr_warning("Cannot use LBR callstack with branch stack. " 1054 "Falling back to framepointers.\n"); 1055 } 1056 1057 if (param->record_mode == CALLCHAIN_DWARF) { 1058 if (!function) { 1059 const char *arch = perf_env__arch(evsel__env(evsel)); 1060 1061 evsel__set_sample_bit(evsel, REGS_USER); 1062 evsel__set_sample_bit(evsel, STACK_USER); 1063 if (opts->sample_user_regs && 1064 DWARF_MINIMAL_REGS(arch) != arch__user_reg_mask()) { 1065 attr->sample_regs_user |= DWARF_MINIMAL_REGS(arch); 1066 pr_warning("WARNING: The use of --call-graph=dwarf may require all the user registers, " 1067 "specifying a subset with --user-regs may render DWARF unwinding unreliable, " 1068 "so the minimal registers set (IP, SP) is explicitly forced.\n"); 1069 } else { 1070 attr->sample_regs_user |= arch__user_reg_mask(); 1071 } 1072 attr->sample_stack_user = param->dump_size; 1073 attr->exclude_callchain_user = 1; 1074 } else { 1075 pr_info("Cannot use DWARF unwind for function trace event," 1076 " falling back to framepointers.\n"); 1077 } 1078 } 1079 1080 if (function) { 1081 pr_info("Disabling user space callchains for function trace event.\n"); 1082 attr->exclude_callchain_user = 1; 1083 } 1084 } 1085 1086 void evsel__config_callchain(struct evsel *evsel, struct record_opts *opts, 1087 struct callchain_param *param) 1088 { 1089 if (param->enabled) 1090 return __evsel__config_callchain(evsel, opts, param); 1091 } 1092 1093 static void evsel__reset_callgraph(struct evsel *evsel, struct callchain_param *param) 1094 { 1095 struct perf_event_attr *attr = &evsel->core.attr; 1096 1097 evsel__reset_sample_bit(evsel, CALLCHAIN); 1098 if (param->record_mode == CALLCHAIN_LBR) { 1099 evsel__reset_sample_bit(evsel, BRANCH_STACK); 1100 attr->branch_sample_type &= ~(PERF_SAMPLE_BRANCH_USER | 1101 PERF_SAMPLE_BRANCH_CALL_STACK | 1102 PERF_SAMPLE_BRANCH_HW_INDEX); 1103 } 1104 if (param->record_mode == CALLCHAIN_DWARF) { 1105 evsel__reset_sample_bit(evsel, REGS_USER); 1106 evsel__reset_sample_bit(evsel, STACK_USER); 1107 } 1108 } 1109 1110 static void evsel__apply_config_terms(struct evsel *evsel, 1111 struct record_opts *opts, bool track) 1112 { 1113 struct evsel_config_term *term; 1114 struct list_head *config_terms = &evsel->config_terms; 1115 struct perf_event_attr *attr = &evsel->core.attr; 1116 /* callgraph default */ 1117 struct callchain_param param = { 1118 .record_mode = callchain_param.record_mode, 1119 }; 1120 u32 dump_size = 0; 1121 int max_stack = 0; 1122 const char *callgraph_buf = NULL; 1123 1124 list_for_each_entry(term, config_terms, list) { 1125 switch (term->type) { 1126 case EVSEL__CONFIG_TERM_PERIOD: 1127 if (!(term->weak && opts->user_interval != ULLONG_MAX)) { 1128 attr->sample_period = term->val.period; 1129 attr->freq = 0; 1130 evsel__reset_sample_bit(evsel, PERIOD); 1131 } 1132 break; 1133 case EVSEL__CONFIG_TERM_FREQ: 1134 if (!(term->weak && opts->user_freq != UINT_MAX)) { 1135 attr->sample_freq = term->val.freq; 1136 attr->freq = 1; 1137 evsel__set_sample_bit(evsel, PERIOD); 1138 } 1139 break; 1140 case EVSEL__CONFIG_TERM_TIME: 1141 if (term->val.time) 1142 evsel__set_sample_bit(evsel, TIME); 1143 else 1144 evsel__reset_sample_bit(evsel, TIME); 1145 break; 1146 case EVSEL__CONFIG_TERM_CALLGRAPH: 1147 callgraph_buf = term->val.str; 1148 break; 1149 case EVSEL__CONFIG_TERM_BRANCH: 1150 if (term->val.str && strcmp(term->val.str, "no")) { 1151 evsel__set_sample_bit(evsel, BRANCH_STACK); 1152 parse_branch_str(term->val.str, 1153 &attr->branch_sample_type); 1154 } else 1155 evsel__reset_sample_bit(evsel, BRANCH_STACK); 1156 break; 1157 case EVSEL__CONFIG_TERM_STACK_USER: 1158 dump_size = term->val.stack_user; 1159 break; 1160 case EVSEL__CONFIG_TERM_MAX_STACK: 1161 max_stack = term->val.max_stack; 1162 break; 1163 case EVSEL__CONFIG_TERM_MAX_EVENTS: 1164 evsel->max_events = term->val.max_events; 1165 break; 1166 case EVSEL__CONFIG_TERM_INHERIT: 1167 /* 1168 * attr->inherit should has already been set by 1169 * evsel__config. If user explicitly set 1170 * inherit using config terms, override global 1171 * opt->no_inherit setting. 1172 */ 1173 attr->inherit = term->val.inherit ? 1 : 0; 1174 break; 1175 case EVSEL__CONFIG_TERM_OVERWRITE: 1176 attr->write_backward = term->val.overwrite ? 1 : 0; 1177 break; 1178 case EVSEL__CONFIG_TERM_DRV_CFG: 1179 break; 1180 case EVSEL__CONFIG_TERM_PERCORE: 1181 break; 1182 case EVSEL__CONFIG_TERM_AUX_OUTPUT: 1183 attr->aux_output = term->val.aux_output ? 1 : 0; 1184 break; 1185 case EVSEL__CONFIG_TERM_AUX_ACTION: 1186 /* Already applied by auxtrace */ 1187 break; 1188 case EVSEL__CONFIG_TERM_AUX_SAMPLE_SIZE: 1189 /* Already applied by auxtrace */ 1190 break; 1191 case EVSEL__CONFIG_TERM_CFG_CHG: 1192 break; 1193 default: 1194 break; 1195 } 1196 } 1197 1198 /* User explicitly set per-event callgraph, clear the old setting and reset. */ 1199 if ((callgraph_buf != NULL) || (dump_size > 0) || max_stack) { 1200 bool sample_address = false; 1201 1202 if (max_stack) { 1203 param.max_stack = max_stack; 1204 if (callgraph_buf == NULL) 1205 callgraph_buf = "fp"; 1206 } 1207 1208 /* parse callgraph parameters */ 1209 if (callgraph_buf != NULL) { 1210 if (!strcmp(callgraph_buf, "no")) { 1211 param.enabled = false; 1212 param.record_mode = CALLCHAIN_NONE; 1213 } else { 1214 param.enabled = true; 1215 if (parse_callchain_record(callgraph_buf, ¶m)) { 1216 pr_err("per-event callgraph setting for %s failed. " 1217 "Apply callgraph global setting for it\n", 1218 evsel->name); 1219 return; 1220 } 1221 if (param.record_mode == CALLCHAIN_DWARF) 1222 sample_address = true; 1223 } 1224 } 1225 if (dump_size > 0) { 1226 dump_size = round_up(dump_size, sizeof(u64)); 1227 param.dump_size = dump_size; 1228 } 1229 1230 /* If global callgraph set, clear it */ 1231 if (callchain_param.enabled) 1232 evsel__reset_callgraph(evsel, &callchain_param); 1233 1234 /* set perf-event callgraph */ 1235 if (param.enabled) { 1236 if (sample_address) { 1237 evsel__set_sample_bit(evsel, ADDR); 1238 evsel__set_sample_bit(evsel, DATA_SRC); 1239 evsel->core.attr.mmap_data = track; 1240 } 1241 evsel__config_callchain(evsel, opts, ¶m); 1242 } 1243 } 1244 } 1245 1246 struct evsel_config_term *__evsel__get_config_term(struct evsel *evsel, enum evsel_term_type type) 1247 { 1248 struct evsel_config_term *term, *found_term = NULL; 1249 1250 list_for_each_entry(term, &evsel->config_terms, list) { 1251 if (term->type == type) 1252 found_term = term; 1253 } 1254 1255 return found_term; 1256 } 1257 1258 void __weak arch_evsel__set_sample_weight(struct evsel *evsel) 1259 { 1260 evsel__set_sample_bit(evsel, WEIGHT); 1261 } 1262 1263 void __weak arch__post_evsel_config(struct evsel *evsel __maybe_unused, 1264 struct perf_event_attr *attr __maybe_unused) 1265 { 1266 } 1267 1268 static void evsel__set_default_freq_period(struct record_opts *opts, 1269 struct perf_event_attr *attr) 1270 { 1271 if (opts->freq) { 1272 attr->freq = 1; 1273 attr->sample_freq = opts->freq; 1274 } else { 1275 attr->sample_period = opts->default_interval; 1276 } 1277 } 1278 1279 bool evsel__is_offcpu_event(struct evsel *evsel) 1280 { 1281 return evsel__is_bpf_output(evsel) && evsel__name_is(evsel, OFFCPU_EVENT) && 1282 evsel->core.attr.sample_type & PERF_SAMPLE_RAW; 1283 } 1284 1285 /* 1286 * The enable_on_exec/disabled value strategy: 1287 * 1288 * 1) For any type of traced program: 1289 * - all independent events and group leaders are disabled 1290 * - all group members are enabled 1291 * 1292 * Group members are ruled by group leaders. They need to 1293 * be enabled, because the group scheduling relies on that. 1294 * 1295 * 2) For traced programs executed by perf: 1296 * - all independent events and group leaders have 1297 * enable_on_exec set 1298 * - we don't specifically enable or disable any event during 1299 * the record command 1300 * 1301 * Independent events and group leaders are initially disabled 1302 * and get enabled by exec. Group members are ruled by group 1303 * leaders as stated in 1). 1304 * 1305 * 3) For traced programs attached by perf (pid/tid): 1306 * - we specifically enable or disable all events during 1307 * the record command 1308 * 1309 * When attaching events to already running traced we 1310 * enable/disable events specifically, as there's no 1311 * initial traced exec call. 1312 */ 1313 void evsel__config(struct evsel *evsel, struct record_opts *opts, 1314 struct callchain_param *callchain) 1315 { 1316 struct evsel *leader = evsel__leader(evsel); 1317 struct perf_event_attr *attr = &evsel->core.attr; 1318 int track = evsel->tracking; 1319 bool per_cpu = opts->target.default_per_cpu && !opts->target.per_thread; 1320 1321 attr->sample_id_all = perf_missing_features.sample_id_all ? 0 : 1; 1322 attr->inherit = target__has_cpu(&opts->target) ? 0 : !opts->no_inherit; 1323 attr->write_backward = opts->overwrite ? 1 : 0; 1324 attr->read_format = PERF_FORMAT_LOST; 1325 1326 evsel__set_sample_bit(evsel, IP); 1327 evsel__set_sample_bit(evsel, TID); 1328 1329 if (evsel->sample_read) { 1330 evsel__set_sample_bit(evsel, READ); 1331 1332 /* 1333 * We need ID even in case of single event, because 1334 * PERF_SAMPLE_READ process ID specific data. 1335 */ 1336 evsel__set_sample_id(evsel, false); 1337 1338 /* 1339 * Apply group format only if we belong to group 1340 * with more than one members. 1341 */ 1342 if (leader->core.nr_members > 1) { 1343 attr->read_format |= PERF_FORMAT_GROUP; 1344 } 1345 1346 /* 1347 * Inherit + SAMPLE_READ requires SAMPLE_TID in the read_format 1348 */ 1349 if (attr->inherit) { 1350 evsel__set_sample_bit(evsel, TID); 1351 evsel->core.attr.read_format |= 1352 PERF_FORMAT_ID; 1353 } 1354 } 1355 1356 /* 1357 * We default some events to have a default interval. But keep 1358 * it a weak assumption overridable by the user. 1359 */ 1360 if ((evsel->is_libpfm_event && !attr->sample_period) || 1361 (!evsel->is_libpfm_event && (!attr->sample_period || 1362 opts->user_freq != UINT_MAX || 1363 opts->user_interval != ULLONG_MAX))) 1364 evsel__set_default_freq_period(opts, attr); 1365 1366 /* 1367 * If attr->freq was set (here or earlier), ask for period 1368 * to be sampled. 1369 */ 1370 if (attr->freq) 1371 evsel__set_sample_bit(evsel, PERIOD); 1372 1373 if (opts->no_samples) 1374 attr->sample_freq = 0; 1375 1376 if (opts->inherit_stat) { 1377 evsel->core.attr.read_format |= 1378 PERF_FORMAT_TOTAL_TIME_ENABLED | 1379 PERF_FORMAT_TOTAL_TIME_RUNNING | 1380 PERF_FORMAT_ID; 1381 attr->inherit_stat = 1; 1382 } 1383 1384 if (opts->sample_address) { 1385 evsel__set_sample_bit(evsel, ADDR); 1386 attr->mmap_data = track; 1387 } 1388 1389 /* 1390 * We don't allow user space callchains for function trace 1391 * event, due to issues with page faults while tracing page 1392 * fault handler and its overall trickiness nature. 1393 */ 1394 if (evsel__is_function_event(evsel)) 1395 evsel->core.attr.exclude_callchain_user = 1; 1396 1397 if (callchain && callchain->enabled && !evsel->no_aux_samples) 1398 evsel__config_callchain(evsel, opts, callchain); 1399 1400 if (opts->sample_intr_regs && !evsel->no_aux_samples && 1401 !evsel__is_dummy_event(evsel)) { 1402 attr->sample_regs_intr = opts->sample_intr_regs; 1403 evsel__set_sample_bit(evsel, REGS_INTR); 1404 } 1405 1406 if (opts->sample_user_regs && !evsel->no_aux_samples && 1407 !evsel__is_dummy_event(evsel)) { 1408 attr->sample_regs_user |= opts->sample_user_regs; 1409 evsel__set_sample_bit(evsel, REGS_USER); 1410 } 1411 1412 if (target__has_cpu(&opts->target) || opts->sample_cpu) 1413 evsel__set_sample_bit(evsel, CPU); 1414 1415 /* 1416 * When the user explicitly disabled time don't force it here. 1417 */ 1418 if (opts->sample_time && 1419 (!perf_missing_features.sample_id_all && 1420 (!opts->no_inherit || target__has_cpu(&opts->target) || per_cpu || 1421 opts->sample_time_set))) 1422 evsel__set_sample_bit(evsel, TIME); 1423 1424 if (opts->raw_samples && !evsel->no_aux_samples) { 1425 evsel__set_sample_bit(evsel, TIME); 1426 evsel__set_sample_bit(evsel, RAW); 1427 evsel__set_sample_bit(evsel, CPU); 1428 } 1429 1430 if (opts->sample_data_src) 1431 evsel__set_sample_bit(evsel, DATA_SRC); 1432 1433 if (opts->sample_phys_addr) 1434 evsel__set_sample_bit(evsel, PHYS_ADDR); 1435 1436 if (opts->no_buffering) { 1437 attr->watermark = 0; 1438 attr->wakeup_events = 1; 1439 } 1440 if (opts->branch_stack && !evsel->no_aux_samples) { 1441 evsel__set_sample_bit(evsel, BRANCH_STACK); 1442 attr->branch_sample_type = opts->branch_stack; 1443 } 1444 1445 if (opts->sample_weight || evsel->retire_lat) { 1446 arch_evsel__set_sample_weight(evsel); 1447 evsel->retire_lat = false; 1448 } 1449 attr->task = track; 1450 attr->mmap = track; 1451 attr->mmap2 = track && !perf_missing_features.mmap2; 1452 attr->comm = track; 1453 attr->build_id = track && opts->build_id; 1454 1455 /* 1456 * ksymbol is tracked separately with text poke because it needs to be 1457 * system wide and enabled immediately. 1458 */ 1459 if (!opts->text_poke) 1460 attr->ksymbol = track && !perf_missing_features.ksymbol; 1461 attr->bpf_event = track && !opts->no_bpf_event && !perf_missing_features.bpf; 1462 1463 if (opts->record_namespaces) 1464 attr->namespaces = track; 1465 1466 if (opts->record_cgroup) { 1467 attr->cgroup = track && !perf_missing_features.cgroup; 1468 evsel__set_sample_bit(evsel, CGROUP); 1469 } 1470 1471 if (opts->sample_data_page_size) 1472 evsel__set_sample_bit(evsel, DATA_PAGE_SIZE); 1473 1474 if (opts->sample_code_page_size) 1475 evsel__set_sample_bit(evsel, CODE_PAGE_SIZE); 1476 1477 if (opts->record_switch_events) 1478 attr->context_switch = track; 1479 1480 if (opts->sample_transaction) 1481 evsel__set_sample_bit(evsel, TRANSACTION); 1482 1483 if (opts->running_time) { 1484 evsel->core.attr.read_format |= 1485 PERF_FORMAT_TOTAL_TIME_ENABLED | 1486 PERF_FORMAT_TOTAL_TIME_RUNNING; 1487 } 1488 1489 /* 1490 * XXX see the function comment above 1491 * 1492 * Disabling only independent events or group leaders, 1493 * keeping group members enabled. 1494 */ 1495 if (evsel__is_group_leader(evsel)) 1496 attr->disabled = 1; 1497 1498 /* 1499 * Setting enable_on_exec for independent events and 1500 * group leaders for traced executed by perf. 1501 */ 1502 if (target__none(&opts->target) && evsel__is_group_leader(evsel) && 1503 !opts->target.initial_delay) 1504 attr->enable_on_exec = 1; 1505 1506 if (evsel->immediate) { 1507 attr->disabled = 0; 1508 attr->enable_on_exec = 0; 1509 } 1510 1511 clockid = opts->clockid; 1512 if (opts->use_clockid) { 1513 attr->use_clockid = 1; 1514 attr->clockid = opts->clockid; 1515 } 1516 1517 if (evsel->precise_max) 1518 attr->precise_ip = 3; 1519 1520 if (opts->all_user) { 1521 attr->exclude_kernel = 1; 1522 attr->exclude_user = 0; 1523 } 1524 1525 if (opts->all_kernel) { 1526 attr->exclude_kernel = 0; 1527 attr->exclude_user = 1; 1528 } 1529 1530 if (evsel->core.pmu_cpus || evsel->unit) 1531 evsel->core.attr.read_format |= PERF_FORMAT_ID; 1532 1533 /* 1534 * Apply event specific term settings, 1535 * it overloads any global configuration. 1536 */ 1537 evsel__apply_config_terms(evsel, opts, track); 1538 1539 evsel->ignore_missing_thread = opts->ignore_missing_thread; 1540 1541 /* The --period option takes the precedence. */ 1542 if (opts->period_set) { 1543 if (opts->period) 1544 evsel__set_sample_bit(evsel, PERIOD); 1545 else 1546 evsel__reset_sample_bit(evsel, PERIOD); 1547 } 1548 1549 /* 1550 * A dummy event never triggers any actual counter and therefore 1551 * cannot be used with branch_stack. 1552 * 1553 * For initial_delay, a dummy event is added implicitly. 1554 * The software event will trigger -EOPNOTSUPP error out, 1555 * if BRANCH_STACK bit is set. 1556 */ 1557 if (evsel__is_dummy_event(evsel)) 1558 evsel__reset_sample_bit(evsel, BRANCH_STACK); 1559 1560 if (evsel__is_offcpu_event(evsel)) { 1561 evsel->core.attr.sample_type &= OFFCPU_SAMPLE_TYPES; 1562 attr->inherit = 0; 1563 } 1564 1565 arch__post_evsel_config(evsel, attr); 1566 } 1567 1568 int evsel__set_filter(struct evsel *evsel, const char *filter) 1569 { 1570 char *new_filter = strdup(filter); 1571 1572 if (new_filter != NULL) { 1573 free(evsel->filter); 1574 evsel->filter = new_filter; 1575 return 0; 1576 } 1577 1578 return -1; 1579 } 1580 1581 static int evsel__append_filter(struct evsel *evsel, const char *fmt, const char *filter) 1582 { 1583 char *new_filter; 1584 1585 if (evsel->filter == NULL) 1586 return evsel__set_filter(evsel, filter); 1587 1588 if (asprintf(&new_filter, fmt, evsel->filter, filter) > 0) { 1589 free(evsel->filter); 1590 evsel->filter = new_filter; 1591 return 0; 1592 } 1593 1594 return -1; 1595 } 1596 1597 int evsel__append_tp_filter(struct evsel *evsel, const char *filter) 1598 { 1599 return evsel__append_filter(evsel, "(%s) && (%s)", filter); 1600 } 1601 1602 int evsel__append_addr_filter(struct evsel *evsel, const char *filter) 1603 { 1604 return evsel__append_filter(evsel, "%s,%s", filter); 1605 } 1606 1607 /* Caller has to clear disabled after going through all CPUs. */ 1608 int evsel__enable_cpu(struct evsel *evsel, int cpu_map_idx) 1609 { 1610 return perf_evsel__enable_cpu(&evsel->core, cpu_map_idx); 1611 } 1612 1613 int evsel__enable(struct evsel *evsel) 1614 { 1615 int err = perf_evsel__enable(&evsel->core); 1616 1617 if (!err) 1618 evsel->disabled = false; 1619 return err; 1620 } 1621 1622 /* Caller has to set disabled after going through all CPUs. */ 1623 int evsel__disable_cpu(struct evsel *evsel, int cpu_map_idx) 1624 { 1625 return perf_evsel__disable_cpu(&evsel->core, cpu_map_idx); 1626 } 1627 1628 int evsel__disable(struct evsel *evsel) 1629 { 1630 int err = perf_evsel__disable(&evsel->core); 1631 /* 1632 * We mark it disabled here so that tools that disable a event can 1633 * ignore events after they disable it. I.e. the ring buffer may have 1634 * already a few more events queued up before the kernel got the stop 1635 * request. 1636 */ 1637 if (!err) 1638 evsel->disabled = true; 1639 1640 return err; 1641 } 1642 1643 void free_config_terms(struct list_head *config_terms) 1644 { 1645 struct evsel_config_term *term, *h; 1646 1647 list_for_each_entry_safe(term, h, config_terms, list) { 1648 list_del_init(&term->list); 1649 if (term->free_str) 1650 zfree(&term->val.str); 1651 free(term); 1652 } 1653 } 1654 1655 static void evsel__free_config_terms(struct evsel *evsel) 1656 { 1657 free_config_terms(&evsel->config_terms); 1658 } 1659 1660 static void (*evsel__priv_destructor)(void *priv); 1661 1662 void evsel__set_priv_destructor(void (*destructor)(void *priv)) 1663 { 1664 assert(evsel__priv_destructor == NULL); 1665 1666 evsel__priv_destructor = destructor; 1667 } 1668 1669 void evsel__exit(struct evsel *evsel) 1670 { 1671 assert(list_empty(&evsel->core.node)); 1672 assert(evsel->evlist == NULL); 1673 if (evsel__is_retire_lat(evsel)) 1674 evsel__tpebs_close(evsel); 1675 bpf_counter__destroy(evsel); 1676 perf_bpf_filter__destroy(evsel); 1677 evsel__free_counts(evsel); 1678 perf_evsel__free_fd(&evsel->core); 1679 perf_evsel__free_id(&evsel->core); 1680 evsel__free_config_terms(evsel); 1681 cgroup__put(evsel->cgrp); 1682 perf_evsel__exit(&evsel->core); 1683 zfree(&evsel->group_name); 1684 zfree(&evsel->name); 1685 #ifdef HAVE_LIBTRACEEVENT 1686 zfree(&evsel->tp_sys); 1687 zfree(&evsel->tp_name); 1688 #endif 1689 zfree(&evsel->filter); 1690 zfree(&evsel->group_pmu_name); 1691 zfree(&evsel->unit); 1692 zfree(&evsel->metric_id); 1693 evsel__zero_per_pkg(evsel); 1694 hashmap__free(evsel->per_pkg_mask); 1695 evsel->per_pkg_mask = NULL; 1696 zfree(&evsel->metric_events); 1697 if (evsel__priv_destructor) 1698 evsel__priv_destructor(evsel->priv); 1699 perf_evsel__object.fini(evsel); 1700 if (evsel__tool_event(evsel) == TOOL_PMU__EVENT_SYSTEM_TIME || 1701 evsel__tool_event(evsel) == TOOL_PMU__EVENT_USER_TIME) 1702 xyarray__delete(evsel->start_times); 1703 } 1704 1705 void evsel__delete(struct evsel *evsel) 1706 { 1707 if (!evsel) 1708 return; 1709 1710 evsel__exit(evsel); 1711 free(evsel); 1712 } 1713 1714 void evsel__compute_deltas(struct evsel *evsel, int cpu_map_idx, int thread, 1715 struct perf_counts_values *count) 1716 { 1717 struct perf_counts_values tmp; 1718 1719 if (!evsel->prev_raw_counts) 1720 return; 1721 1722 tmp = *perf_counts(evsel->prev_raw_counts, cpu_map_idx, thread); 1723 *perf_counts(evsel->prev_raw_counts, cpu_map_idx, thread) = *count; 1724 1725 count->val = count->val - tmp.val; 1726 count->ena = count->ena - tmp.ena; 1727 count->run = count->run - tmp.run; 1728 } 1729 1730 static int evsel__read_one(struct evsel *evsel, int cpu_map_idx, int thread) 1731 { 1732 struct perf_counts_values *count = perf_counts(evsel->counts, cpu_map_idx, thread); 1733 1734 return perf_evsel__read(&evsel->core, cpu_map_idx, thread, count); 1735 } 1736 1737 static void evsel__set_count(struct evsel *counter, int cpu_map_idx, int thread, 1738 u64 val, u64 ena, u64 run, u64 lost) 1739 { 1740 struct perf_counts_values *count; 1741 1742 count = perf_counts(counter->counts, cpu_map_idx, thread); 1743 1744 if (evsel__is_retire_lat(counter)) { 1745 evsel__tpebs_read(counter, cpu_map_idx, thread); 1746 perf_counts__set_loaded(counter->counts, cpu_map_idx, thread, true); 1747 return; 1748 } 1749 1750 count->val = val; 1751 count->ena = ena; 1752 count->run = run; 1753 count->lost = lost; 1754 1755 perf_counts__set_loaded(counter->counts, cpu_map_idx, thread, true); 1756 } 1757 1758 static bool evsel__group_has_tpebs(struct evsel *leader) 1759 { 1760 struct evsel *evsel; 1761 1762 for_each_group_evsel(evsel, leader) { 1763 if (evsel__is_retire_lat(evsel)) 1764 return true; 1765 } 1766 return false; 1767 } 1768 1769 static u64 evsel__group_read_nr_members(struct evsel *leader) 1770 { 1771 u64 nr = leader->core.nr_members; 1772 struct evsel *evsel; 1773 1774 for_each_group_evsel(evsel, leader) { 1775 if (evsel__is_retire_lat(evsel)) 1776 nr--; 1777 } 1778 return nr; 1779 } 1780 1781 static u64 evsel__group_read_size(struct evsel *leader) 1782 { 1783 u64 read_format = leader->core.attr.read_format; 1784 int entry = sizeof(u64); /* value */ 1785 int size = 0; 1786 int nr = 1; 1787 1788 if (!evsel__group_has_tpebs(leader)) 1789 return perf_evsel__read_size(&leader->core); 1790 1791 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1792 size += sizeof(u64); 1793 1794 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1795 size += sizeof(u64); 1796 1797 if (read_format & PERF_FORMAT_ID) 1798 entry += sizeof(u64); 1799 1800 if (read_format & PERF_FORMAT_LOST) 1801 entry += sizeof(u64); 1802 1803 if (read_format & PERF_FORMAT_GROUP) { 1804 nr = evsel__group_read_nr_members(leader); 1805 size += sizeof(u64); 1806 } 1807 1808 size += entry * nr; 1809 return size; 1810 } 1811 1812 static int evsel__process_group_data(struct evsel *leader, int cpu_map_idx, int thread, u64 *data) 1813 { 1814 u64 read_format = leader->core.attr.read_format; 1815 struct sample_read_value *v; 1816 u64 nr, ena = 0, run = 0, lost = 0; 1817 1818 nr = *data++; 1819 1820 if (nr != evsel__group_read_nr_members(leader)) 1821 return -EINVAL; 1822 1823 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) 1824 ena = *data++; 1825 1826 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) 1827 run = *data++; 1828 1829 v = (void *)data; 1830 sample_read_group__for_each(v, nr, read_format) { 1831 struct evsel *counter; 1832 1833 counter = evlist__id2evsel(leader->evlist, v->id); 1834 if (!counter) 1835 return -EINVAL; 1836 1837 if (read_format & PERF_FORMAT_LOST) 1838 lost = v->lost; 1839 1840 evsel__set_count(counter, cpu_map_idx, thread, v->value, ena, run, lost); 1841 } 1842 1843 return 0; 1844 } 1845 1846 static int evsel__read_group(struct evsel *leader, int cpu_map_idx, int thread) 1847 { 1848 struct perf_stat_evsel *ps = leader->stats; 1849 u64 read_format = leader->core.attr.read_format; 1850 int size = evsel__group_read_size(leader); 1851 u64 *data = ps->group_data; 1852 1853 if (!(read_format & PERF_FORMAT_ID)) 1854 return -EINVAL; 1855 1856 if (!evsel__is_group_leader(leader)) 1857 return -EINVAL; 1858 1859 if (!data) { 1860 data = zalloc(size); 1861 if (!data) 1862 return -ENOMEM; 1863 1864 ps->group_data = data; 1865 } 1866 1867 if (FD(leader, cpu_map_idx, thread) < 0) 1868 return -EINVAL; 1869 1870 if (readn(FD(leader, cpu_map_idx, thread), data, size) <= 0) 1871 return -errno; 1872 1873 return evsel__process_group_data(leader, cpu_map_idx, thread, data); 1874 } 1875 1876 bool __evsel__match(const struct evsel *evsel, u32 type, u64 config) 1877 { 1878 1879 u32 e_type = evsel->core.attr.type; 1880 u64 e_config = evsel->core.attr.config; 1881 1882 if (e_type != type) { 1883 return type == PERF_TYPE_HARDWARE && evsel->pmu && evsel->pmu->is_core && 1884 evsel->alternate_hw_config == config; 1885 } 1886 1887 if ((type == PERF_TYPE_HARDWARE || type == PERF_TYPE_HW_CACHE) && 1888 perf_pmus__supports_extended_type()) 1889 e_config &= PERF_HW_EVENT_MASK; 1890 1891 return e_config == config; 1892 } 1893 1894 int evsel__read_counter(struct evsel *evsel, int cpu_map_idx, int thread) 1895 { 1896 if (evsel__is_tool(evsel)) 1897 return evsel__tool_pmu_read(evsel, cpu_map_idx, thread); 1898 1899 if (evsel__is_hwmon(evsel)) 1900 return evsel__hwmon_pmu_read(evsel, cpu_map_idx, thread); 1901 1902 if (evsel__is_drm(evsel)) 1903 return evsel__drm_pmu_read(evsel, cpu_map_idx, thread); 1904 1905 if (evsel__is_retire_lat(evsel)) 1906 return evsel__tpebs_read(evsel, cpu_map_idx, thread); 1907 1908 if (evsel->core.attr.read_format & PERF_FORMAT_GROUP) 1909 return evsel__read_group(evsel, cpu_map_idx, thread); 1910 1911 return evsel__read_one(evsel, cpu_map_idx, thread); 1912 } 1913 1914 int __evsel__read_on_cpu(struct evsel *evsel, int cpu_map_idx, int thread, bool scale) 1915 { 1916 struct perf_counts_values count; 1917 size_t nv = scale ? 3 : 1; 1918 1919 if (FD(evsel, cpu_map_idx, thread) < 0) 1920 return -EINVAL; 1921 1922 if (evsel->counts == NULL && evsel__alloc_counts(evsel) < 0) 1923 return -ENOMEM; 1924 1925 if (readn(FD(evsel, cpu_map_idx, thread), &count, nv * sizeof(u64)) <= 0) 1926 return -errno; 1927 1928 evsel__compute_deltas(evsel, cpu_map_idx, thread, &count); 1929 perf_counts_values__scale(&count, scale, NULL); 1930 *perf_counts(evsel->counts, cpu_map_idx, thread) = count; 1931 return 0; 1932 } 1933 1934 static int evsel__match_other_cpu(struct evsel *evsel, struct evsel *other, 1935 int cpu_map_idx) 1936 { 1937 struct perf_cpu cpu; 1938 1939 cpu = perf_cpu_map__cpu(evsel->core.cpus, cpu_map_idx); 1940 return perf_cpu_map__idx(other->core.cpus, cpu); 1941 } 1942 1943 static int evsel__hybrid_group_cpu_map_idx(struct evsel *evsel, int cpu_map_idx) 1944 { 1945 struct evsel *leader = evsel__leader(evsel); 1946 1947 if ((evsel__is_hybrid(evsel) && !evsel__is_hybrid(leader)) || 1948 (!evsel__is_hybrid(evsel) && evsel__is_hybrid(leader))) { 1949 return evsel__match_other_cpu(evsel, leader, cpu_map_idx); 1950 } 1951 1952 return cpu_map_idx; 1953 } 1954 1955 static int get_group_fd(struct evsel *evsel, int cpu_map_idx, int thread) 1956 { 1957 struct evsel *leader = evsel__leader(evsel); 1958 int fd; 1959 1960 if (evsel__is_group_leader(evsel)) 1961 return -1; 1962 1963 /* 1964 * Leader must be already processed/open, 1965 * if not it's a bug. 1966 */ 1967 BUG_ON(!leader->core.fd); 1968 1969 cpu_map_idx = evsel__hybrid_group_cpu_map_idx(evsel, cpu_map_idx); 1970 if (cpu_map_idx == -1) 1971 return -1; 1972 1973 fd = FD(leader, cpu_map_idx, thread); 1974 BUG_ON(fd == -1 && !leader->skippable); 1975 1976 /* 1977 * When the leader has been skipped, return -2 to distinguish from no 1978 * group leader case. 1979 */ 1980 return fd == -1 ? -2 : fd; 1981 } 1982 1983 static void evsel__remove_fd(struct evsel *pos, int nr_cpus, int nr_threads, int thread_idx) 1984 { 1985 for (int cpu = 0; cpu < nr_cpus; cpu++) 1986 for (int thread = thread_idx; thread < nr_threads - 1; thread++) 1987 FD(pos, cpu, thread) = FD(pos, cpu, thread + 1); 1988 } 1989 1990 static int update_fds(struct evsel *evsel, 1991 int nr_cpus, int cpu_map_idx, 1992 int nr_threads, int thread_idx) 1993 { 1994 struct evsel *pos; 1995 1996 if (cpu_map_idx >= nr_cpus || thread_idx >= nr_threads) 1997 return -EINVAL; 1998 1999 evlist__for_each_entry(evsel->evlist, pos) { 2000 nr_cpus = pos != evsel ? nr_cpus : cpu_map_idx; 2001 2002 evsel__remove_fd(pos, nr_cpus, nr_threads, thread_idx); 2003 2004 /* 2005 * Since fds for next evsel has not been created, 2006 * there is no need to iterate whole event list. 2007 */ 2008 if (pos == evsel) 2009 break; 2010 } 2011 return 0; 2012 } 2013 2014 static bool evsel__ignore_missing_thread(struct evsel *evsel, 2015 int nr_cpus, int cpu_map_idx, 2016 struct perf_thread_map *threads, 2017 int thread, int err) 2018 { 2019 pid_t ignore_pid = perf_thread_map__pid(threads, thread); 2020 2021 if (!evsel->ignore_missing_thread) 2022 return false; 2023 2024 /* The system wide setup does not work with threads. */ 2025 if (evsel->core.system_wide) 2026 return false; 2027 2028 /* The -ESRCH is perf event syscall errno for pid's not found. */ 2029 if (err != -ESRCH) 2030 return false; 2031 2032 /* If there's only one thread, let it fail. */ 2033 if (threads->nr == 1) 2034 return false; 2035 2036 /* 2037 * We should remove fd for missing_thread first 2038 * because thread_map__remove() will decrease threads->nr. 2039 */ 2040 if (update_fds(evsel, nr_cpus, cpu_map_idx, threads->nr, thread)) 2041 return false; 2042 2043 if (thread_map__remove(threads, thread)) 2044 return false; 2045 2046 pr_warning("WARNING: Ignored open failure for pid %d\n", 2047 ignore_pid); 2048 return true; 2049 } 2050 2051 static int __open_attr__fprintf(FILE *fp, const char *name, const char *val, 2052 void *priv __maybe_unused) 2053 { 2054 return fprintf(fp, " %-32s %s\n", name, val); 2055 } 2056 2057 static void display_attr(struct perf_event_attr *attr) 2058 { 2059 if (verbose >= 2 || debug_peo_args) { 2060 fprintf(stderr, "%.60s\n", graph_dotted_line); 2061 fprintf(stderr, "perf_event_attr:\n"); 2062 perf_event_attr__fprintf(stderr, attr, __open_attr__fprintf, NULL); 2063 fprintf(stderr, "%.60s\n", graph_dotted_line); 2064 } 2065 } 2066 2067 bool evsel__precise_ip_fallback(struct evsel *evsel) 2068 { 2069 /* Do not try less precise if not requested. */ 2070 if (!evsel->precise_max) 2071 return false; 2072 2073 /* 2074 * We tried all the precise_ip values, and it's 2075 * still failing, so leave it to standard fallback. 2076 */ 2077 if (!evsel->core.attr.precise_ip) { 2078 evsel->core.attr.precise_ip = evsel->precise_ip_original; 2079 return false; 2080 } 2081 2082 if (!evsel->precise_ip_original) 2083 evsel->precise_ip_original = evsel->core.attr.precise_ip; 2084 2085 evsel->core.attr.precise_ip--; 2086 pr_debug2_peo("decreasing precise_ip by one (%d)\n", evsel->core.attr.precise_ip); 2087 display_attr(&evsel->core.attr); 2088 return true; 2089 } 2090 2091 static struct perf_cpu_map *empty_cpu_map; 2092 static struct perf_thread_map *empty_thread_map; 2093 2094 static int __evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus, 2095 struct perf_thread_map *threads) 2096 { 2097 int ret = 0; 2098 int nthreads = perf_thread_map__nr(threads); 2099 2100 if ((perf_missing_features.write_backward && evsel->core.attr.write_backward) || 2101 (perf_missing_features.aux_output && evsel->core.attr.aux_output)) 2102 return -EINVAL; 2103 2104 if (cpus == NULL) { 2105 if (empty_cpu_map == NULL) { 2106 empty_cpu_map = perf_cpu_map__new_any_cpu(); 2107 if (empty_cpu_map == NULL) 2108 return -ENOMEM; 2109 } 2110 2111 cpus = empty_cpu_map; 2112 } 2113 2114 if (threads == NULL) { 2115 if (empty_thread_map == NULL) { 2116 empty_thread_map = thread_map__new_by_tid(-1); 2117 if (empty_thread_map == NULL) 2118 return -ENOMEM; 2119 } 2120 2121 threads = empty_thread_map; 2122 } 2123 2124 if (evsel->core.fd == NULL && 2125 perf_evsel__alloc_fd(&evsel->core, perf_cpu_map__nr(cpus), nthreads) < 0) 2126 return -ENOMEM; 2127 2128 if (evsel__is_tool(evsel)) 2129 ret = evsel__tool_pmu_prepare_open(evsel, cpus, nthreads); 2130 2131 evsel->open_flags = PERF_FLAG_FD_CLOEXEC; 2132 if (evsel->cgrp) 2133 evsel->open_flags |= PERF_FLAG_PID_CGROUP; 2134 2135 return ret; 2136 } 2137 2138 static void evsel__disable_missing_features(struct evsel *evsel) 2139 { 2140 if (perf_missing_features.inherit_sample_read && evsel->core.attr.inherit && 2141 (evsel->core.attr.sample_type & PERF_SAMPLE_READ)) 2142 evsel->core.attr.inherit = 0; 2143 if (perf_missing_features.branch_counters) 2144 evsel->core.attr.branch_sample_type &= ~PERF_SAMPLE_BRANCH_COUNTERS; 2145 if (perf_missing_features.read_lost) 2146 evsel->core.attr.read_format &= ~PERF_FORMAT_LOST; 2147 if (perf_missing_features.weight_struct) { 2148 evsel__set_sample_bit(evsel, WEIGHT); 2149 evsel__reset_sample_bit(evsel, WEIGHT_STRUCT); 2150 } 2151 if (perf_missing_features.clockid_wrong) 2152 evsel->core.attr.clockid = CLOCK_MONOTONIC; /* should always work */ 2153 if (perf_missing_features.clockid) { 2154 evsel->core.attr.use_clockid = 0; 2155 evsel->core.attr.clockid = 0; 2156 } 2157 if (perf_missing_features.cloexec) 2158 evsel->open_flags &= ~(unsigned long)PERF_FLAG_FD_CLOEXEC; 2159 if (perf_missing_features.mmap2) 2160 evsel->core.attr.mmap2 = 0; 2161 if (evsel->pmu && evsel->pmu->missing_features.exclude_guest) 2162 evsel->core.attr.exclude_guest = evsel->core.attr.exclude_host = 0; 2163 if (perf_missing_features.lbr_flags) 2164 evsel->core.attr.branch_sample_type &= ~(PERF_SAMPLE_BRANCH_NO_FLAGS | 2165 PERF_SAMPLE_BRANCH_NO_CYCLES); 2166 if (perf_missing_features.group_read && evsel->core.attr.inherit) 2167 evsel->core.attr.read_format &= ~(PERF_FORMAT_GROUP|PERF_FORMAT_ID); 2168 if (perf_missing_features.ksymbol) 2169 evsel->core.attr.ksymbol = 0; 2170 if (perf_missing_features.bpf) 2171 evsel->core.attr.bpf_event = 0; 2172 if (perf_missing_features.branch_hw_idx) 2173 evsel->core.attr.branch_sample_type &= ~PERF_SAMPLE_BRANCH_HW_INDEX; 2174 if (perf_missing_features.sample_id_all) 2175 evsel->core.attr.sample_id_all = 0; 2176 } 2177 2178 int evsel__prepare_open(struct evsel *evsel, struct perf_cpu_map *cpus, 2179 struct perf_thread_map *threads) 2180 { 2181 int err; 2182 2183 err = __evsel__prepare_open(evsel, cpus, threads); 2184 if (err) 2185 return err; 2186 2187 evsel__disable_missing_features(evsel); 2188 2189 return err; 2190 } 2191 2192 static bool __has_attr_feature(struct perf_event_attr *attr, 2193 struct perf_cpu cpu, unsigned long flags) 2194 { 2195 int fd = syscall(SYS_perf_event_open, attr, /*pid=*/0, cpu.cpu, 2196 /*group_fd=*/-1, flags); 2197 close(fd); 2198 2199 if (fd < 0) { 2200 attr->exclude_kernel = 1; 2201 2202 fd = syscall(SYS_perf_event_open, attr, /*pid=*/0, cpu.cpu, 2203 /*group_fd=*/-1, flags); 2204 close(fd); 2205 } 2206 2207 if (fd < 0) { 2208 attr->exclude_hv = 1; 2209 2210 fd = syscall(SYS_perf_event_open, attr, /*pid=*/0, cpu.cpu, 2211 /*group_fd=*/-1, flags); 2212 close(fd); 2213 } 2214 2215 if (fd < 0) { 2216 attr->exclude_guest = 1; 2217 2218 fd = syscall(SYS_perf_event_open, attr, /*pid=*/0, cpu.cpu, 2219 /*group_fd=*/-1, flags); 2220 close(fd); 2221 } 2222 2223 attr->exclude_kernel = 0; 2224 attr->exclude_guest = 0; 2225 attr->exclude_hv = 0; 2226 2227 return fd >= 0; 2228 } 2229 2230 static bool has_attr_feature(struct perf_event_attr *attr, unsigned long flags) 2231 { 2232 struct perf_cpu cpu = {.cpu = -1}; 2233 2234 return __has_attr_feature(attr, cpu, flags); 2235 } 2236 2237 static void evsel__detect_missing_pmu_features(struct evsel *evsel) 2238 { 2239 struct perf_event_attr attr = { 2240 .type = evsel->core.attr.type, 2241 .config = evsel->core.attr.config, 2242 .disabled = 1, 2243 }; 2244 struct perf_pmu *pmu = evsel->pmu; 2245 int old_errno; 2246 2247 old_errno = errno; 2248 2249 if (pmu == NULL) 2250 pmu = evsel->pmu = evsel__find_pmu(evsel); 2251 2252 if (pmu == NULL || pmu->missing_features.checked) 2253 goto out; 2254 2255 /* 2256 * Must probe features in the order they were added to the 2257 * perf_event_attr interface. These are kernel core limitation but 2258 * specific to PMUs with branch stack. So we can detect with the given 2259 * hardware event and stop on the first one succeeded. 2260 */ 2261 2262 /* Please add new feature detection here. */ 2263 2264 attr.exclude_guest = 1; 2265 if (has_attr_feature(&attr, /*flags=*/0)) 2266 goto found; 2267 pmu->missing_features.exclude_guest = true; 2268 pr_debug2("switching off exclude_guest for PMU %s\n", pmu->name); 2269 2270 found: 2271 pmu->missing_features.checked = true; 2272 out: 2273 errno = old_errno; 2274 } 2275 2276 static void evsel__detect_missing_brstack_features(struct evsel *evsel) 2277 { 2278 static bool detection_done = false; 2279 struct perf_event_attr attr = { 2280 .type = evsel->core.attr.type, 2281 .config = evsel->core.attr.config, 2282 .disabled = 1, 2283 .sample_type = PERF_SAMPLE_BRANCH_STACK, 2284 .sample_period = 1000, 2285 }; 2286 int old_errno; 2287 2288 if (detection_done) 2289 return; 2290 2291 old_errno = errno; 2292 2293 /* 2294 * Must probe features in the order they were added to the 2295 * perf_event_attr interface. These are PMU specific limitation 2296 * so we can detect with the given hardware event and stop on the 2297 * first one succeeded. 2298 */ 2299 2300 /* Please add new feature detection here. */ 2301 2302 attr.branch_sample_type = PERF_SAMPLE_BRANCH_COUNTERS; 2303 if (has_attr_feature(&attr, /*flags=*/0)) 2304 goto found; 2305 perf_missing_features.branch_counters = true; 2306 pr_debug2("switching off branch counters support\n"); 2307 2308 attr.branch_sample_type = PERF_SAMPLE_BRANCH_HW_INDEX; 2309 if (has_attr_feature(&attr, /*flags=*/0)) 2310 goto found; 2311 perf_missing_features.branch_hw_idx = true; 2312 pr_debug2("switching off branch HW index support\n"); 2313 2314 attr.branch_sample_type = PERF_SAMPLE_BRANCH_NO_CYCLES | PERF_SAMPLE_BRANCH_NO_FLAGS; 2315 if (has_attr_feature(&attr, /*flags=*/0)) 2316 goto found; 2317 perf_missing_features.lbr_flags = true; 2318 pr_debug2_peo("switching off branch sample type no (cycles/flags)\n"); 2319 2320 found: 2321 detection_done = true; 2322 errno = old_errno; 2323 } 2324 2325 static bool evsel__probe_aux_action(struct evsel *evsel, struct perf_cpu cpu) 2326 { 2327 struct perf_event_attr attr = evsel->core.attr; 2328 int old_errno = errno; 2329 2330 attr.disabled = 1; 2331 attr.aux_start_paused = 1; 2332 2333 if (__has_attr_feature(&attr, cpu, /*flags=*/0)) { 2334 errno = old_errno; 2335 return true; 2336 } 2337 2338 /* 2339 * EOPNOTSUPP means the kernel supports the feature but the PMU does 2340 * not, so keep that distinction if possible. 2341 */ 2342 if (errno != EOPNOTSUPP) 2343 errno = old_errno; 2344 2345 return false; 2346 } 2347 2348 static void evsel__detect_missing_aux_action_feature(struct evsel *evsel, struct perf_cpu cpu) 2349 { 2350 static bool detection_done; 2351 struct evsel *leader; 2352 2353 /* 2354 * Don't bother probing aux_action if it is not being used or has been 2355 * probed before. 2356 */ 2357 if (!evsel->core.attr.aux_action || detection_done) 2358 return; 2359 2360 detection_done = true; 2361 2362 /* 2363 * The leader is an AUX area event. If it has failed, assume the feature 2364 * is not supported. 2365 */ 2366 leader = evsel__leader(evsel); 2367 if (evsel == leader) { 2368 perf_missing_features.aux_action = true; 2369 return; 2370 } 2371 2372 /* 2373 * AUX area event with aux_action must have been opened successfully 2374 * already, so feature is supported. 2375 */ 2376 if (leader->core.attr.aux_action) 2377 return; 2378 2379 if (!evsel__probe_aux_action(leader, cpu)) 2380 perf_missing_features.aux_action = true; 2381 } 2382 2383 static bool evsel__detect_missing_features(struct evsel *evsel, struct perf_cpu cpu) 2384 { 2385 static bool detection_done = false; 2386 struct perf_event_attr attr = { 2387 .type = PERF_TYPE_SOFTWARE, 2388 .config = PERF_COUNT_SW_TASK_CLOCK, 2389 .disabled = 1, 2390 }; 2391 int old_errno; 2392 2393 evsel__detect_missing_aux_action_feature(evsel, cpu); 2394 2395 evsel__detect_missing_pmu_features(evsel); 2396 2397 if (evsel__has_br_stack(evsel)) 2398 evsel__detect_missing_brstack_features(evsel); 2399 2400 if (detection_done) 2401 goto check; 2402 2403 old_errno = errno; 2404 2405 /* 2406 * Must probe features in the order they were added to the 2407 * perf_event_attr interface. These are kernel core limitation 2408 * not PMU-specific so we can detect with a software event and 2409 * stop on the first one succeeded. 2410 */ 2411 2412 /* Please add new feature detection here. */ 2413 2414 attr.inherit = true; 2415 attr.sample_type = PERF_SAMPLE_READ; 2416 if (has_attr_feature(&attr, /*flags=*/0)) 2417 goto found; 2418 perf_missing_features.inherit_sample_read = true; 2419 pr_debug2("Using PERF_SAMPLE_READ / :S modifier is not compatible with inherit, falling back to no-inherit.\n"); 2420 attr.inherit = false; 2421 attr.sample_type = 0; 2422 2423 attr.read_format = PERF_FORMAT_LOST; 2424 if (has_attr_feature(&attr, /*flags=*/0)) 2425 goto found; 2426 perf_missing_features.read_lost = true; 2427 pr_debug2("switching off PERF_FORMAT_LOST support\n"); 2428 attr.read_format = 0; 2429 2430 attr.sample_type = PERF_SAMPLE_WEIGHT_STRUCT; 2431 if (has_attr_feature(&attr, /*flags=*/0)) 2432 goto found; 2433 perf_missing_features.weight_struct = true; 2434 pr_debug2("switching off weight struct support\n"); 2435 attr.sample_type = 0; 2436 2437 attr.sample_type = PERF_SAMPLE_CODE_PAGE_SIZE; 2438 if (has_attr_feature(&attr, /*flags=*/0)) 2439 goto found; 2440 perf_missing_features.code_page_size = true; 2441 pr_debug2_peo("Kernel has no PERF_SAMPLE_CODE_PAGE_SIZE support\n"); 2442 attr.sample_type = 0; 2443 2444 attr.sample_type = PERF_SAMPLE_DATA_PAGE_SIZE; 2445 if (has_attr_feature(&attr, /*flags=*/0)) 2446 goto found; 2447 perf_missing_features.data_page_size = true; 2448 pr_debug2_peo("Kernel has no PERF_SAMPLE_DATA_PAGE_SIZE support\n"); 2449 attr.sample_type = 0; 2450 2451 attr.cgroup = 1; 2452 if (has_attr_feature(&attr, /*flags=*/0)) 2453 goto found; 2454 perf_missing_features.cgroup = true; 2455 pr_debug2_peo("Kernel has no cgroup sampling support\n"); 2456 attr.cgroup = 0; 2457 2458 attr.aux_output = 1; 2459 if (has_attr_feature(&attr, /*flags=*/0)) 2460 goto found; 2461 perf_missing_features.aux_output = true; 2462 pr_debug2_peo("Kernel has no attr.aux_output support\n"); 2463 attr.aux_output = 0; 2464 2465 attr.bpf_event = 1; 2466 if (has_attr_feature(&attr, /*flags=*/0)) 2467 goto found; 2468 perf_missing_features.bpf = true; 2469 pr_debug2_peo("switching off bpf_event\n"); 2470 attr.bpf_event = 0; 2471 2472 attr.ksymbol = 1; 2473 if (has_attr_feature(&attr, /*flags=*/0)) 2474 goto found; 2475 perf_missing_features.ksymbol = true; 2476 pr_debug2_peo("switching off ksymbol\n"); 2477 attr.ksymbol = 0; 2478 2479 attr.write_backward = 1; 2480 if (has_attr_feature(&attr, /*flags=*/0)) 2481 goto found; 2482 perf_missing_features.write_backward = true; 2483 pr_debug2_peo("switching off write_backward\n"); 2484 attr.write_backward = 0; 2485 2486 attr.use_clockid = 1; 2487 attr.clockid = CLOCK_MONOTONIC; 2488 if (has_attr_feature(&attr, /*flags=*/0)) 2489 goto found; 2490 perf_missing_features.clockid = true; 2491 pr_debug2_peo("switching off clockid\n"); 2492 attr.use_clockid = 0; 2493 attr.clockid = 0; 2494 2495 if (has_attr_feature(&attr, /*flags=*/PERF_FLAG_FD_CLOEXEC)) 2496 goto found; 2497 perf_missing_features.cloexec = true; 2498 pr_debug2_peo("switching off cloexec flag\n"); 2499 2500 attr.mmap2 = 1; 2501 if (has_attr_feature(&attr, /*flags=*/0)) 2502 goto found; 2503 perf_missing_features.mmap2 = true; 2504 pr_debug2_peo("switching off mmap2\n"); 2505 attr.mmap2 = 0; 2506 2507 /* set this unconditionally? */ 2508 perf_missing_features.sample_id_all = true; 2509 pr_debug2_peo("switching off sample_id_all\n"); 2510 2511 attr.inherit = 1; 2512 attr.read_format = PERF_FORMAT_GROUP; 2513 if (has_attr_feature(&attr, /*flags=*/0)) 2514 goto found; 2515 perf_missing_features.group_read = true; 2516 pr_debug2_peo("switching off group read\n"); 2517 attr.inherit = 0; 2518 attr.read_format = 0; 2519 2520 found: 2521 detection_done = true; 2522 errno = old_errno; 2523 2524 check: 2525 if (evsel->core.attr.inherit && 2526 (evsel->core.attr.sample_type & PERF_SAMPLE_READ) && 2527 perf_missing_features.inherit_sample_read) 2528 return true; 2529 2530 if ((evsel->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_COUNTERS) && 2531 perf_missing_features.branch_counters) 2532 return true; 2533 2534 if ((evsel->core.attr.read_format & PERF_FORMAT_LOST) && 2535 perf_missing_features.read_lost) 2536 return true; 2537 2538 if ((evsel->core.attr.sample_type & PERF_SAMPLE_WEIGHT_STRUCT) && 2539 perf_missing_features.weight_struct) 2540 return true; 2541 2542 if (evsel->core.attr.use_clockid && evsel->core.attr.clockid != CLOCK_MONOTONIC && 2543 !perf_missing_features.clockid) { 2544 perf_missing_features.clockid_wrong = true; 2545 return true; 2546 } 2547 2548 if (evsel->core.attr.use_clockid && perf_missing_features.clockid) 2549 return true; 2550 2551 if ((evsel->open_flags & PERF_FLAG_FD_CLOEXEC) && 2552 perf_missing_features.cloexec) 2553 return true; 2554 2555 if (evsel->core.attr.mmap2 && perf_missing_features.mmap2) 2556 return true; 2557 2558 if ((evsel->core.attr.branch_sample_type & (PERF_SAMPLE_BRANCH_NO_FLAGS | 2559 PERF_SAMPLE_BRANCH_NO_CYCLES)) && 2560 perf_missing_features.lbr_flags) 2561 return true; 2562 2563 if (evsel->core.attr.inherit && (evsel->core.attr.read_format & PERF_FORMAT_GROUP) && 2564 perf_missing_features.group_read) 2565 return true; 2566 2567 if (evsel->core.attr.ksymbol && perf_missing_features.ksymbol) 2568 return true; 2569 2570 if (evsel->core.attr.bpf_event && perf_missing_features.bpf) 2571 return true; 2572 2573 if ((evsel->core.attr.branch_sample_type & PERF_SAMPLE_BRANCH_HW_INDEX) && 2574 perf_missing_features.branch_hw_idx) 2575 return true; 2576 2577 if (evsel->core.attr.sample_id_all && perf_missing_features.sample_id_all) 2578 return true; 2579 2580 return false; 2581 } 2582 2583 static int evsel__open_cpu(struct evsel *evsel, struct perf_cpu_map *cpus, 2584 struct perf_thread_map *threads, 2585 int start_cpu_map_idx, int end_cpu_map_idx) 2586 { 2587 int idx, thread, nthreads; 2588 int pid = -1, err, old_errno; 2589 enum rlimit_action set_rlimit = NO_CHANGE; 2590 struct perf_cpu cpu; 2591 2592 if (evsel__is_retire_lat(evsel)) 2593 return evsel__tpebs_open(evsel); 2594 2595 err = __evsel__prepare_open(evsel, cpus, threads); 2596 if (err) 2597 return err; 2598 2599 if (cpus == NULL) 2600 cpus = empty_cpu_map; 2601 2602 if (threads == NULL) 2603 threads = empty_thread_map; 2604 2605 nthreads = perf_thread_map__nr(threads); 2606 2607 if (evsel->cgrp) 2608 pid = evsel->cgrp->fd; 2609 2610 fallback_missing_features: 2611 evsel__disable_missing_features(evsel); 2612 2613 pr_debug3("Opening: %s\n", evsel__name(evsel)); 2614 display_attr(&evsel->core.attr); 2615 2616 if (evsel__is_tool(evsel)) { 2617 return evsel__tool_pmu_open(evsel, threads, 2618 start_cpu_map_idx, 2619 end_cpu_map_idx); 2620 } 2621 if (evsel__is_hwmon(evsel)) { 2622 return evsel__hwmon_pmu_open(evsel, threads, 2623 start_cpu_map_idx, 2624 end_cpu_map_idx); 2625 } 2626 if (evsel__is_drm(evsel)) { 2627 return evsel__drm_pmu_open(evsel, threads, 2628 start_cpu_map_idx, 2629 end_cpu_map_idx); 2630 } 2631 2632 for (idx = start_cpu_map_idx; idx < end_cpu_map_idx; idx++) { 2633 cpu = perf_cpu_map__cpu(cpus, idx); 2634 2635 for (thread = 0; thread < nthreads; thread++) { 2636 int fd, group_fd; 2637 retry_open: 2638 if (thread >= nthreads) 2639 break; 2640 2641 if (!evsel->cgrp && !evsel->core.system_wide) 2642 pid = perf_thread_map__pid(threads, thread); 2643 2644 group_fd = get_group_fd(evsel, idx, thread); 2645 2646 if (group_fd == -2) { 2647 pr_debug("broken group leader for %s\n", evsel->name); 2648 err = -EINVAL; 2649 goto out_close; 2650 } 2651 2652 /* Debug message used by test scripts */ 2653 pr_debug2_peo("sys_perf_event_open: pid %d cpu %d group_fd %d flags %#lx", 2654 pid, cpu.cpu, group_fd, evsel->open_flags); 2655 2656 fd = sys_perf_event_open(&evsel->core.attr, pid, cpu.cpu, 2657 group_fd, evsel->open_flags); 2658 2659 FD(evsel, idx, thread) = fd; 2660 2661 if (fd < 0) { 2662 err = -errno; 2663 2664 pr_debug2_peo("\nsys_perf_event_open failed, error %d\n", 2665 err); 2666 goto try_fallback; 2667 } 2668 2669 bpf_counter__install_pe(evsel, idx, fd); 2670 2671 if (unlikely(test_attr__enabled())) { 2672 test_attr__open(&evsel->core.attr, pid, cpu, 2673 fd, group_fd, evsel->open_flags); 2674 } 2675 2676 /* Debug message used by test scripts */ 2677 pr_debug2_peo(" = %d\n", fd); 2678 2679 if (evsel->bpf_fd >= 0) { 2680 int evt_fd = fd; 2681 int bpf_fd = evsel->bpf_fd; 2682 2683 err = ioctl(evt_fd, 2684 PERF_EVENT_IOC_SET_BPF, 2685 bpf_fd); 2686 if (err && errno != EEXIST) { 2687 pr_err("failed to attach bpf fd %d: %s\n", 2688 bpf_fd, strerror(errno)); 2689 err = -EINVAL; 2690 goto out_close; 2691 } 2692 } 2693 2694 set_rlimit = NO_CHANGE; 2695 2696 /* 2697 * If we succeeded but had to kill clockid, fail and 2698 * have evsel__open_strerror() print us a nice error. 2699 */ 2700 if (perf_missing_features.clockid || 2701 perf_missing_features.clockid_wrong) { 2702 err = -EINVAL; 2703 goto out_close; 2704 } 2705 } 2706 } 2707 2708 return 0; 2709 2710 try_fallback: 2711 if (evsel__ignore_missing_thread(evsel, perf_cpu_map__nr(cpus), 2712 idx, threads, thread, err)) { 2713 /* We just removed 1 thread, so lower the upper nthreads limit. */ 2714 nthreads--; 2715 2716 /* ... and pretend like nothing have happened. */ 2717 err = 0; 2718 goto retry_open; 2719 } 2720 /* 2721 * perf stat needs between 5 and 22 fds per CPU. When we run out 2722 * of them try to increase the limits. 2723 */ 2724 if (err == -EMFILE && rlimit__increase_nofile(&set_rlimit)) 2725 goto retry_open; 2726 2727 if (err == -EINVAL && evsel__detect_missing_features(evsel, cpu)) 2728 goto fallback_missing_features; 2729 2730 if (evsel__precise_ip_fallback(evsel)) 2731 goto retry_open; 2732 2733 out_close: 2734 if (err) 2735 threads->err_thread = thread; 2736 2737 old_errno = errno; 2738 do { 2739 while (--thread >= 0) { 2740 if (FD(evsel, idx, thread) >= 0) 2741 close(FD(evsel, idx, thread)); 2742 FD(evsel, idx, thread) = -1; 2743 } 2744 thread = nthreads; 2745 } while (--idx >= 0); 2746 errno = old_errno; 2747 return err; 2748 } 2749 2750 int evsel__open(struct evsel *evsel, struct perf_cpu_map *cpus, 2751 struct perf_thread_map *threads) 2752 { 2753 return evsel__open_cpu(evsel, cpus, threads, 0, perf_cpu_map__nr(cpus)); 2754 } 2755 2756 void evsel__close(struct evsel *evsel) 2757 { 2758 if (evsel__is_retire_lat(evsel)) 2759 evsel__tpebs_close(evsel); 2760 perf_evsel__close(&evsel->core); 2761 perf_evsel__free_id(&evsel->core); 2762 } 2763 2764 int evsel__open_per_cpu_and_thread(struct evsel *evsel, 2765 struct perf_cpu_map *cpus, int cpu_map_idx, 2766 struct perf_thread_map *threads) 2767 { 2768 if (cpu_map_idx == -1) 2769 return evsel__open_cpu(evsel, cpus, threads, 0, perf_cpu_map__nr(cpus)); 2770 2771 return evsel__open_cpu(evsel, cpus, threads, cpu_map_idx, cpu_map_idx + 1); 2772 } 2773 2774 int evsel__open_per_cpu(struct evsel *evsel, struct perf_cpu_map *cpus, int cpu_map_idx) 2775 { 2776 struct perf_thread_map *threads = thread_map__new_by_tid(-1); 2777 int ret = evsel__open_per_cpu_and_thread(evsel, cpus, cpu_map_idx, threads); 2778 2779 perf_thread_map__put(threads); 2780 return ret; 2781 } 2782 2783 int evsel__open_per_thread(struct evsel *evsel, struct perf_thread_map *threads) 2784 { 2785 struct perf_cpu_map *cpus = perf_cpu_map__new_any_cpu(); 2786 int ret = evsel__open_per_cpu_and_thread(evsel, cpus, -1, threads); 2787 2788 perf_cpu_map__put(cpus); 2789 return ret; 2790 } 2791 2792 static int perf_evsel__parse_id_sample(const struct evsel *evsel, 2793 const union perf_event *event, 2794 struct perf_sample *sample) 2795 { 2796 u64 type = evsel->core.attr.sample_type; 2797 const __u64 *array = event->sample.array; 2798 bool swapped = evsel->needs_swap; 2799 union u64_swap u; 2800 2801 array += ((event->header.size - 2802 sizeof(event->header)) / sizeof(u64)) - 1; 2803 2804 if (type & PERF_SAMPLE_IDENTIFIER) { 2805 sample->id = *array; 2806 array--; 2807 } 2808 2809 if (type & PERF_SAMPLE_CPU) { 2810 u.val64 = *array; 2811 if (swapped) { 2812 /* undo swap of u64, then swap on individual u32s */ 2813 u.val64 = bswap_64(u.val64); 2814 u.val32[0] = bswap_32(u.val32[0]); 2815 } 2816 2817 sample->cpu = u.val32[0]; 2818 array--; 2819 } 2820 2821 if (type & PERF_SAMPLE_STREAM_ID) { 2822 sample->stream_id = *array; 2823 array--; 2824 } 2825 2826 if (type & PERF_SAMPLE_ID) { 2827 sample->id = *array; 2828 array--; 2829 } 2830 2831 if (type & PERF_SAMPLE_TIME) { 2832 sample->time = *array; 2833 array--; 2834 } 2835 2836 if (type & PERF_SAMPLE_TID) { 2837 u.val64 = *array; 2838 if (swapped) { 2839 /* undo swap of u64, then swap on individual u32s */ 2840 u.val64 = bswap_64(u.val64); 2841 u.val32[0] = bswap_32(u.val32[0]); 2842 u.val32[1] = bswap_32(u.val32[1]); 2843 } 2844 2845 sample->pid = u.val32[0]; 2846 sample->tid = u.val32[1]; 2847 array--; 2848 } 2849 2850 return 0; 2851 } 2852 2853 static inline bool overflow(const void *endp, u16 max_size, const void *offset, 2854 u64 size) 2855 { 2856 return size > max_size || offset + size > endp; 2857 } 2858 2859 #define OVERFLOW_CHECK(offset, size, max_size) \ 2860 do { \ 2861 if (overflow(endp, (max_size), (offset), (size))) \ 2862 return -EFAULT; \ 2863 } while (0) 2864 2865 #define OVERFLOW_CHECK_u64(offset) \ 2866 OVERFLOW_CHECK(offset, sizeof(u64), sizeof(u64)) 2867 2868 static int 2869 perf_event__check_size(union perf_event *event, unsigned int sample_size) 2870 { 2871 /* 2872 * The evsel's sample_size is based on PERF_SAMPLE_MASK which includes 2873 * up to PERF_SAMPLE_PERIOD. After that overflow() must be used to 2874 * check the format does not go past the end of the event. 2875 */ 2876 if (sample_size + sizeof(event->header) > event->header.size) 2877 return -EFAULT; 2878 2879 return 0; 2880 } 2881 2882 void __weak arch_perf_parse_sample_weight(struct perf_sample *data, 2883 const __u64 *array, 2884 u64 type __maybe_unused) 2885 { 2886 data->weight = *array; 2887 } 2888 2889 u64 evsel__bitfield_swap_branch_flags(u64 value) 2890 { 2891 u64 new_val = 0; 2892 2893 /* 2894 * branch_flags 2895 * union { 2896 * u64 values; 2897 * struct { 2898 * mispred:1 //target mispredicted 2899 * predicted:1 //target predicted 2900 * in_tx:1 //in transaction 2901 * abort:1 //transaction abort 2902 * cycles:16 //cycle count to last branch 2903 * type:4 //branch type 2904 * spec:2 //branch speculation info 2905 * new_type:4 //additional branch type 2906 * priv:3 //privilege level 2907 * reserved:31 2908 * } 2909 * } 2910 * 2911 * Avoid bswap64() the entire branch_flag.value, 2912 * as it has variable bit-field sizes. Instead the 2913 * macro takes the bit-field position/size, 2914 * swaps it based on the host endianness. 2915 */ 2916 if (host_is_bigendian()) { 2917 new_val = bitfield_swap(value, 0, 1); 2918 new_val |= bitfield_swap(value, 1, 1); 2919 new_val |= bitfield_swap(value, 2, 1); 2920 new_val |= bitfield_swap(value, 3, 1); 2921 new_val |= bitfield_swap(value, 4, 16); 2922 new_val |= bitfield_swap(value, 20, 4); 2923 new_val |= bitfield_swap(value, 24, 2); 2924 new_val |= bitfield_swap(value, 26, 4); 2925 new_val |= bitfield_swap(value, 30, 3); 2926 new_val |= bitfield_swap(value, 33, 31); 2927 } else { 2928 new_val = bitfield_swap(value, 63, 1); 2929 new_val |= bitfield_swap(value, 62, 1); 2930 new_val |= bitfield_swap(value, 61, 1); 2931 new_val |= bitfield_swap(value, 60, 1); 2932 new_val |= bitfield_swap(value, 44, 16); 2933 new_val |= bitfield_swap(value, 40, 4); 2934 new_val |= bitfield_swap(value, 38, 2); 2935 new_val |= bitfield_swap(value, 34, 4); 2936 new_val |= bitfield_swap(value, 31, 3); 2937 new_val |= bitfield_swap(value, 0, 31); 2938 } 2939 2940 return new_val; 2941 } 2942 2943 static inline bool evsel__has_branch_counters(const struct evsel *evsel) 2944 { 2945 struct evsel *leader = evsel__leader(evsel); 2946 2947 /* The branch counters feature only supports group */ 2948 if (!leader || !evsel->evlist) 2949 return false; 2950 2951 if (evsel->evlist->nr_br_cntr < 0) 2952 evlist__update_br_cntr(evsel->evlist); 2953 2954 if (leader->br_cntr_nr > 0) 2955 return true; 2956 2957 return false; 2958 } 2959 2960 static int __set_offcpu_sample(struct perf_sample *data) 2961 { 2962 u64 *array = data->raw_data; 2963 u32 max_size = data->raw_size, *p32; 2964 const void *endp = (void *)array + max_size; 2965 2966 if (array == NULL) 2967 return -EFAULT; 2968 2969 OVERFLOW_CHECK_u64(array); 2970 p32 = (void *)array++; 2971 data->pid = p32[0]; 2972 data->tid = p32[1]; 2973 2974 OVERFLOW_CHECK_u64(array); 2975 data->period = *array++; 2976 2977 OVERFLOW_CHECK_u64(array); 2978 data->callchain = (struct ip_callchain *)array++; 2979 OVERFLOW_CHECK(array, data->callchain->nr * sizeof(u64), max_size); 2980 data->ip = data->callchain->ips[1]; 2981 array += data->callchain->nr; 2982 2983 OVERFLOW_CHECK_u64(array); 2984 data->cgroup = *array; 2985 2986 return 0; 2987 } 2988 2989 int evsel__parse_sample(struct evsel *evsel, union perf_event *event, 2990 struct perf_sample *data) 2991 { 2992 u64 type = evsel->core.attr.sample_type; 2993 bool swapped = evsel->needs_swap; 2994 const __u64 *array; 2995 u16 max_size = event->header.size; 2996 const void *endp = (void *)event + max_size; 2997 u64 sz; 2998 2999 /* 3000 * used for cross-endian analysis. See git commit 65014ab3 3001 * for why this goofiness is needed. 3002 */ 3003 union u64_swap u; 3004 3005 memset(data, 0, sizeof(*data)); 3006 data->cpu = data->pid = data->tid = -1; 3007 data->stream_id = data->id = data->time = -1ULL; 3008 data->period = evsel->core.attr.sample_period; 3009 data->cpumode = event->header.misc & PERF_RECORD_MISC_CPUMODE_MASK; 3010 data->misc = event->header.misc; 3011 data->data_src = PERF_MEM_DATA_SRC_NONE; 3012 data->vcpu = -1; 3013 3014 if (event->header.type != PERF_RECORD_SAMPLE) { 3015 if (!evsel->core.attr.sample_id_all) 3016 return 0; 3017 return perf_evsel__parse_id_sample(evsel, event, data); 3018 } 3019 3020 array = event->sample.array; 3021 3022 if (perf_event__check_size(event, evsel->sample_size)) 3023 return -EFAULT; 3024 3025 if (type & PERF_SAMPLE_IDENTIFIER) { 3026 data->id = *array; 3027 array++; 3028 } 3029 3030 if (type & PERF_SAMPLE_IP) { 3031 data->ip = *array; 3032 array++; 3033 } 3034 3035 if (type & PERF_SAMPLE_TID) { 3036 u.val64 = *array; 3037 if (swapped) { 3038 /* undo swap of u64, then swap on individual u32s */ 3039 u.val64 = bswap_64(u.val64); 3040 u.val32[0] = bswap_32(u.val32[0]); 3041 u.val32[1] = bswap_32(u.val32[1]); 3042 } 3043 3044 data->pid = u.val32[0]; 3045 data->tid = u.val32[1]; 3046 array++; 3047 } 3048 3049 if (type & PERF_SAMPLE_TIME) { 3050 data->time = *array; 3051 array++; 3052 } 3053 3054 if (type & PERF_SAMPLE_ADDR) { 3055 data->addr = *array; 3056 array++; 3057 } 3058 3059 if (type & PERF_SAMPLE_ID) { 3060 data->id = *array; 3061 array++; 3062 } 3063 3064 if (type & PERF_SAMPLE_STREAM_ID) { 3065 data->stream_id = *array; 3066 array++; 3067 } 3068 3069 if (type & PERF_SAMPLE_CPU) { 3070 3071 u.val64 = *array; 3072 if (swapped) { 3073 /* undo swap of u64, then swap on individual u32s */ 3074 u.val64 = bswap_64(u.val64); 3075 u.val32[0] = bswap_32(u.val32[0]); 3076 } 3077 3078 data->cpu = u.val32[0]; 3079 array++; 3080 } 3081 3082 if (type & PERF_SAMPLE_PERIOD) { 3083 data->period = *array; 3084 array++; 3085 } 3086 3087 if (type & PERF_SAMPLE_READ) { 3088 u64 read_format = evsel->core.attr.read_format; 3089 3090 OVERFLOW_CHECK_u64(array); 3091 if (read_format & PERF_FORMAT_GROUP) 3092 data->read.group.nr = *array; 3093 else 3094 data->read.one.value = *array; 3095 3096 array++; 3097 3098 if (read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) { 3099 OVERFLOW_CHECK_u64(array); 3100 data->read.time_enabled = *array; 3101 array++; 3102 } 3103 3104 if (read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) { 3105 OVERFLOW_CHECK_u64(array); 3106 data->read.time_running = *array; 3107 array++; 3108 } 3109 3110 /* PERF_FORMAT_ID is forced for PERF_SAMPLE_READ */ 3111 if (read_format & PERF_FORMAT_GROUP) { 3112 const u64 max_group_nr = UINT64_MAX / 3113 sizeof(struct sample_read_value); 3114 3115 if (data->read.group.nr > max_group_nr) 3116 return -EFAULT; 3117 3118 sz = data->read.group.nr * sample_read_value_size(read_format); 3119 OVERFLOW_CHECK(array, sz, max_size); 3120 data->read.group.values = 3121 (struct sample_read_value *)array; 3122 array = (void *)array + sz; 3123 } else { 3124 OVERFLOW_CHECK_u64(array); 3125 data->read.one.id = *array; 3126 array++; 3127 3128 if (read_format & PERF_FORMAT_LOST) { 3129 OVERFLOW_CHECK_u64(array); 3130 data->read.one.lost = *array; 3131 array++; 3132 } 3133 } 3134 } 3135 3136 if (type & PERF_SAMPLE_CALLCHAIN) { 3137 const u64 max_callchain_nr = UINT64_MAX / sizeof(u64); 3138 3139 OVERFLOW_CHECK_u64(array); 3140 data->callchain = (struct ip_callchain *)array++; 3141 if (data->callchain->nr > max_callchain_nr) 3142 return -EFAULT; 3143 sz = data->callchain->nr * sizeof(u64); 3144 OVERFLOW_CHECK(array, sz, max_size); 3145 array = (void *)array + sz; 3146 } 3147 3148 if (type & PERF_SAMPLE_RAW) { 3149 OVERFLOW_CHECK_u64(array); 3150 u.val64 = *array; 3151 3152 /* 3153 * Undo swap of u64, then swap on individual u32s, 3154 * get the size of the raw area and undo all of the 3155 * swap. The pevent interface handles endianness by 3156 * itself. 3157 */ 3158 if (swapped) { 3159 u.val64 = bswap_64(u.val64); 3160 u.val32[0] = bswap_32(u.val32[0]); 3161 u.val32[1] = bswap_32(u.val32[1]); 3162 } 3163 data->raw_size = u.val32[0]; 3164 3165 /* 3166 * The raw data is aligned on 64bits including the 3167 * u32 size, so it's safe to use mem_bswap_64. 3168 */ 3169 if (swapped) 3170 mem_bswap_64((void *) array, data->raw_size); 3171 3172 array = (void *)array + sizeof(u32); 3173 3174 OVERFLOW_CHECK(array, data->raw_size, max_size); 3175 data->raw_data = (void *)array; 3176 array = (void *)array + data->raw_size; 3177 } 3178 3179 if (type & PERF_SAMPLE_BRANCH_STACK) { 3180 const u64 max_branch_nr = UINT64_MAX / 3181 sizeof(struct branch_entry); 3182 struct branch_entry *e; 3183 unsigned int i; 3184 3185 OVERFLOW_CHECK_u64(array); 3186 data->branch_stack = (struct branch_stack *)array++; 3187 3188 if (data->branch_stack->nr > max_branch_nr) 3189 return -EFAULT; 3190 3191 sz = data->branch_stack->nr * sizeof(struct branch_entry); 3192 if (evsel__has_branch_hw_idx(evsel)) { 3193 sz += sizeof(u64); 3194 e = &data->branch_stack->entries[0]; 3195 } else { 3196 data->no_hw_idx = true; 3197 /* 3198 * if the PERF_SAMPLE_BRANCH_HW_INDEX is not applied, 3199 * only nr and entries[] will be output by kernel. 3200 */ 3201 e = (struct branch_entry *)&data->branch_stack->hw_idx; 3202 } 3203 3204 if (swapped) { 3205 /* 3206 * struct branch_flag does not have endian 3207 * specific bit field definition. And bswap 3208 * will not resolve the issue, since these 3209 * are bit fields. 3210 * 3211 * evsel__bitfield_swap_branch_flags() uses a 3212 * bitfield_swap macro to swap the bit position 3213 * based on the host endians. 3214 */ 3215 for (i = 0; i < data->branch_stack->nr; i++, e++) 3216 e->flags.value = evsel__bitfield_swap_branch_flags(e->flags.value); 3217 } 3218 3219 OVERFLOW_CHECK(array, sz, max_size); 3220 array = (void *)array + sz; 3221 3222 if (evsel__has_branch_counters(evsel)) { 3223 data->branch_stack_cntr = (u64 *)array; 3224 sz = data->branch_stack->nr * sizeof(u64); 3225 3226 OVERFLOW_CHECK(array, sz, max_size); 3227 array = (void *)array + sz; 3228 } 3229 } 3230 3231 if (type & PERF_SAMPLE_REGS_USER) { 3232 struct regs_dump *regs = perf_sample__user_regs(data); 3233 3234 OVERFLOW_CHECK_u64(array); 3235 regs->abi = *array; 3236 array++; 3237 3238 if (regs->abi) { 3239 u64 mask = evsel->core.attr.sample_regs_user; 3240 3241 sz = hweight64(mask) * sizeof(u64); 3242 OVERFLOW_CHECK(array, sz, max_size); 3243 regs->mask = mask; 3244 regs->regs = (u64 *)array; 3245 array = (void *)array + sz; 3246 } 3247 } 3248 3249 if (type & PERF_SAMPLE_STACK_USER) { 3250 OVERFLOW_CHECK_u64(array); 3251 sz = *array++; 3252 3253 data->user_stack.offset = ((char *)(array - 1) 3254 - (char *) event); 3255 3256 if (!sz) { 3257 data->user_stack.size = 0; 3258 } else { 3259 OVERFLOW_CHECK(array, sz, max_size); 3260 data->user_stack.data = (char *)array; 3261 array = (void *)array + sz; 3262 OVERFLOW_CHECK_u64(array); 3263 data->user_stack.size = *array++; 3264 if (WARN_ONCE(data->user_stack.size > sz, 3265 "user stack dump failure\n")) 3266 return -EFAULT; 3267 } 3268 } 3269 3270 if (type & PERF_SAMPLE_WEIGHT_TYPE) { 3271 OVERFLOW_CHECK_u64(array); 3272 arch_perf_parse_sample_weight(data, array, type); 3273 array++; 3274 } 3275 3276 if (type & PERF_SAMPLE_DATA_SRC) { 3277 OVERFLOW_CHECK_u64(array); 3278 data->data_src = *array; 3279 array++; 3280 } 3281 3282 if (type & PERF_SAMPLE_TRANSACTION) { 3283 OVERFLOW_CHECK_u64(array); 3284 data->transaction = *array; 3285 array++; 3286 } 3287 3288 if (type & PERF_SAMPLE_REGS_INTR) { 3289 struct regs_dump *regs = perf_sample__intr_regs(data); 3290 3291 OVERFLOW_CHECK_u64(array); 3292 regs->abi = *array; 3293 array++; 3294 3295 if (regs->abi != PERF_SAMPLE_REGS_ABI_NONE) { 3296 u64 mask = evsel->core.attr.sample_regs_intr; 3297 3298 sz = hweight64(mask) * sizeof(u64); 3299 OVERFLOW_CHECK(array, sz, max_size); 3300 regs->mask = mask; 3301 regs->regs = (u64 *)array; 3302 array = (void *)array + sz; 3303 } 3304 } 3305 3306 data->phys_addr = 0; 3307 if (type & PERF_SAMPLE_PHYS_ADDR) { 3308 data->phys_addr = *array; 3309 array++; 3310 } 3311 3312 data->cgroup = 0; 3313 if (type & PERF_SAMPLE_CGROUP) { 3314 data->cgroup = *array; 3315 array++; 3316 } 3317 3318 data->data_page_size = 0; 3319 if (type & PERF_SAMPLE_DATA_PAGE_SIZE) { 3320 data->data_page_size = *array; 3321 array++; 3322 } 3323 3324 data->code_page_size = 0; 3325 if (type & PERF_SAMPLE_CODE_PAGE_SIZE) { 3326 data->code_page_size = *array; 3327 array++; 3328 } 3329 3330 if (type & PERF_SAMPLE_AUX) { 3331 OVERFLOW_CHECK_u64(array); 3332 sz = *array++; 3333 3334 OVERFLOW_CHECK(array, sz, max_size); 3335 /* Undo swap of data */ 3336 if (swapped) 3337 mem_bswap_64((char *)array, sz); 3338 data->aux_sample.size = sz; 3339 data->aux_sample.data = (char *)array; 3340 array = (void *)array + sz; 3341 } 3342 3343 if (evsel__is_offcpu_event(evsel)) 3344 return __set_offcpu_sample(data); 3345 3346 return 0; 3347 } 3348 3349 int evsel__parse_sample_timestamp(struct evsel *evsel, union perf_event *event, 3350 u64 *timestamp) 3351 { 3352 u64 type = evsel->core.attr.sample_type; 3353 const __u64 *array; 3354 3355 if (!(type & PERF_SAMPLE_TIME)) 3356 return -1; 3357 3358 if (event->header.type != PERF_RECORD_SAMPLE) { 3359 struct perf_sample data = { 3360 .time = -1ULL, 3361 }; 3362 3363 if (!evsel->core.attr.sample_id_all) 3364 return -1; 3365 if (perf_evsel__parse_id_sample(evsel, event, &data)) 3366 return -1; 3367 3368 *timestamp = data.time; 3369 return 0; 3370 } 3371 3372 array = event->sample.array; 3373 3374 if (perf_event__check_size(event, evsel->sample_size)) 3375 return -EFAULT; 3376 3377 if (type & PERF_SAMPLE_IDENTIFIER) 3378 array++; 3379 3380 if (type & PERF_SAMPLE_IP) 3381 array++; 3382 3383 if (type & PERF_SAMPLE_TID) 3384 array++; 3385 3386 if (type & PERF_SAMPLE_TIME) 3387 *timestamp = *array; 3388 3389 return 0; 3390 } 3391 3392 u16 evsel__id_hdr_size(const struct evsel *evsel) 3393 { 3394 u64 sample_type = evsel->core.attr.sample_type; 3395 u16 size = 0; 3396 3397 if (sample_type & PERF_SAMPLE_TID) 3398 size += sizeof(u64); 3399 3400 if (sample_type & PERF_SAMPLE_TIME) 3401 size += sizeof(u64); 3402 3403 if (sample_type & PERF_SAMPLE_ID) 3404 size += sizeof(u64); 3405 3406 if (sample_type & PERF_SAMPLE_STREAM_ID) 3407 size += sizeof(u64); 3408 3409 if (sample_type & PERF_SAMPLE_CPU) 3410 size += sizeof(u64); 3411 3412 if (sample_type & PERF_SAMPLE_IDENTIFIER) 3413 size += sizeof(u64); 3414 3415 return size; 3416 } 3417 3418 #ifdef HAVE_LIBTRACEEVENT 3419 struct tep_format_field *evsel__field(struct evsel *evsel, const char *name) 3420 { 3421 struct tep_event *tp_format = evsel__tp_format(evsel); 3422 3423 return tp_format ? tep_find_field(tp_format, name) : NULL; 3424 } 3425 3426 struct tep_format_field *evsel__common_field(struct evsel *evsel, const char *name) 3427 { 3428 struct tep_event *tp_format = evsel__tp_format(evsel); 3429 3430 return tp_format ? tep_find_common_field(tp_format, name) : NULL; 3431 } 3432 3433 void *evsel__rawptr(struct evsel *evsel, struct perf_sample *sample, const char *name) 3434 { 3435 struct tep_format_field *field = evsel__field(evsel, name); 3436 int offset; 3437 3438 if (!field) 3439 return NULL; 3440 3441 offset = field->offset; 3442 3443 if (field->flags & TEP_FIELD_IS_DYNAMIC) { 3444 offset = *(int *)(sample->raw_data + field->offset); 3445 offset &= 0xffff; 3446 if (tep_field_is_relative(field->flags)) 3447 offset += field->offset + field->size; 3448 } 3449 3450 return sample->raw_data + offset; 3451 } 3452 3453 u64 format_field__intval(struct tep_format_field *field, struct perf_sample *sample, 3454 bool needs_swap) 3455 { 3456 u64 value; 3457 void *ptr = sample->raw_data + field->offset; 3458 3459 switch (field->size) { 3460 case 1: 3461 return *(u8 *)ptr; 3462 case 2: 3463 value = *(u16 *)ptr; 3464 break; 3465 case 4: 3466 value = *(u32 *)ptr; 3467 break; 3468 case 8: 3469 memcpy(&value, ptr, sizeof(u64)); 3470 break; 3471 default: 3472 return 0; 3473 } 3474 3475 if (!needs_swap) 3476 return value; 3477 3478 switch (field->size) { 3479 case 2: 3480 return bswap_16(value); 3481 case 4: 3482 return bswap_32(value); 3483 case 8: 3484 return bswap_64(value); 3485 default: 3486 return 0; 3487 } 3488 3489 return 0; 3490 } 3491 3492 u64 evsel__intval(struct evsel *evsel, struct perf_sample *sample, const char *name) 3493 { 3494 struct tep_format_field *field = evsel__field(evsel, name); 3495 3496 return field ? format_field__intval(field, sample, evsel->needs_swap) : 0; 3497 } 3498 3499 u64 evsel__intval_common(struct evsel *evsel, struct perf_sample *sample, const char *name) 3500 { 3501 struct tep_format_field *field = evsel__common_field(evsel, name); 3502 3503 return field ? format_field__intval(field, sample, evsel->needs_swap) : 0; 3504 } 3505 3506 char evsel__taskstate(struct evsel *evsel, struct perf_sample *sample, const char *name) 3507 { 3508 static struct tep_format_field *prev_state_field; 3509 static const char *states; 3510 struct tep_format_field *field; 3511 unsigned long long val; 3512 unsigned int bit; 3513 char state = '?'; /* '?' denotes unknown task state */ 3514 3515 field = evsel__field(evsel, name); 3516 3517 if (!field) 3518 return state; 3519 3520 if (!states || field != prev_state_field) { 3521 states = parse_task_states(field); 3522 if (!states) 3523 return state; 3524 prev_state_field = field; 3525 } 3526 3527 /* 3528 * Note since the kernel exposes TASK_REPORT_MAX to userspace 3529 * to denote the 'preempted' state, we might as welll report 3530 * 'R' for this case, which make senses to users as well. 3531 * 3532 * We can change this if we have a good reason in the future. 3533 */ 3534 val = evsel__intval(evsel, sample, name); 3535 bit = val ? ffs(val) : 0; 3536 state = (!bit || bit > strlen(states)) ? 'R' : states[bit-1]; 3537 return state; 3538 } 3539 #endif 3540 3541 bool evsel__fallback(struct evsel *evsel, struct target *target, int err, 3542 char *msg, size_t msgsize) 3543 { 3544 int paranoid; 3545 3546 if ((err == ENOENT || err == ENXIO || err == ENODEV) && 3547 evsel->core.attr.type == PERF_TYPE_HARDWARE && 3548 evsel->core.attr.config == PERF_COUNT_HW_CPU_CYCLES) { 3549 /* 3550 * If it's cycles then fall back to hrtimer based cpu-clock sw 3551 * counter, which is always available even if no PMU support. 3552 * 3553 * PPC returns ENXIO until 2.6.37 (behavior changed with commit 3554 * b0a873e). 3555 */ 3556 evsel->core.attr.type = PERF_TYPE_SOFTWARE; 3557 evsel->core.attr.config = target__has_cpu(target) 3558 ? PERF_COUNT_SW_CPU_CLOCK 3559 : PERF_COUNT_SW_TASK_CLOCK; 3560 scnprintf(msg, msgsize, 3561 "The cycles event is not supported, trying to fall back to %s", 3562 target__has_cpu(target) ? "cpu-clock" : "task-clock"); 3563 3564 zfree(&evsel->name); 3565 return true; 3566 } else if (err == EACCES && !evsel->core.attr.exclude_kernel && 3567 (paranoid = perf_event_paranoid()) > 1) { 3568 const char *name = evsel__name(evsel); 3569 char *new_name; 3570 const char *sep = ":"; 3571 3572 /* If event has exclude user then don't exclude kernel. */ 3573 if (evsel->core.attr.exclude_user) 3574 return false; 3575 3576 /* Is there already the separator in the name. */ 3577 if (strchr(name, '/') || 3578 (strchr(name, ':') && !evsel->is_libpfm_event)) 3579 sep = ""; 3580 3581 if (asprintf(&new_name, "%s%su", name, sep) < 0) 3582 return false; 3583 3584 free(evsel->name); 3585 evsel->name = new_name; 3586 scnprintf(msg, msgsize, "kernel.perf_event_paranoid=%d, trying " 3587 "to fall back to excluding kernel and hypervisor " 3588 " samples", paranoid); 3589 evsel->core.attr.exclude_kernel = 1; 3590 evsel->core.attr.exclude_hv = 1; 3591 3592 return true; 3593 } else if (err == EOPNOTSUPP && !evsel->core.attr.exclude_guest && 3594 !evsel->exclude_GH) { 3595 const char *name = evsel__name(evsel); 3596 char *new_name; 3597 const char *sep = ":"; 3598 3599 /* Is there already the separator in the name. */ 3600 if (strchr(name, '/') || 3601 (strchr(name, ':') && !evsel->is_libpfm_event)) 3602 sep = ""; 3603 3604 if (asprintf(&new_name, "%s%sH", name, sep) < 0) 3605 return false; 3606 3607 free(evsel->name); 3608 evsel->name = new_name; 3609 /* Apple M1 requires exclude_guest */ 3610 scnprintf(msg, msgsize, "trying to fall back to excluding guest samples"); 3611 evsel->core.attr.exclude_guest = 1; 3612 3613 return true; 3614 } 3615 3616 return false; 3617 } 3618 3619 static bool find_process(const char *name) 3620 { 3621 size_t len = strlen(name); 3622 DIR *dir; 3623 struct dirent *d; 3624 int ret = -1; 3625 3626 dir = opendir(procfs__mountpoint()); 3627 if (!dir) 3628 return false; 3629 3630 /* Walk through the directory. */ 3631 while (ret && (d = readdir(dir)) != NULL) { 3632 char path[PATH_MAX]; 3633 char *data; 3634 size_t size; 3635 3636 if ((d->d_type != DT_DIR) || 3637 !strcmp(".", d->d_name) || 3638 !strcmp("..", d->d_name)) 3639 continue; 3640 3641 scnprintf(path, sizeof(path), "%s/%s/comm", 3642 procfs__mountpoint(), d->d_name); 3643 3644 if (filename__read_str(path, &data, &size)) 3645 continue; 3646 3647 ret = strncmp(name, data, len); 3648 free(data); 3649 } 3650 3651 closedir(dir); 3652 return ret ? false : true; 3653 } 3654 3655 static int dump_perf_event_processes(char *msg, size_t size) 3656 { 3657 DIR *proc_dir; 3658 struct dirent *proc_entry; 3659 int printed = 0; 3660 3661 proc_dir = opendir(procfs__mountpoint()); 3662 if (!proc_dir) 3663 return 0; 3664 3665 /* Walk through the /proc directory. */ 3666 while ((proc_entry = readdir(proc_dir)) != NULL) { 3667 char buf[256]; 3668 DIR *fd_dir; 3669 struct dirent *fd_entry; 3670 int fd_dir_fd; 3671 3672 if (proc_entry->d_type != DT_DIR || 3673 !isdigit(proc_entry->d_name[0]) || 3674 strlen(proc_entry->d_name) > sizeof(buf) - 4) 3675 continue; 3676 3677 scnprintf(buf, sizeof(buf), "%s/fd", proc_entry->d_name); 3678 fd_dir_fd = openat(dirfd(proc_dir), buf, O_DIRECTORY); 3679 if (fd_dir_fd == -1) 3680 continue; 3681 fd_dir = fdopendir(fd_dir_fd); 3682 if (!fd_dir) { 3683 close(fd_dir_fd); 3684 continue; 3685 } 3686 while ((fd_entry = readdir(fd_dir)) != NULL) { 3687 ssize_t link_size; 3688 3689 if (fd_entry->d_type != DT_LNK) 3690 continue; 3691 link_size = readlinkat(fd_dir_fd, fd_entry->d_name, buf, sizeof(buf)); 3692 if (link_size < 0) 3693 continue; 3694 /* Take care as readlink doesn't null terminate the string. */ 3695 if (!strncmp(buf, "anon_inode:[perf_event]", link_size)) { 3696 int cmdline_fd; 3697 ssize_t cmdline_size; 3698 3699 scnprintf(buf, sizeof(buf), "%s/cmdline", proc_entry->d_name); 3700 cmdline_fd = openat(dirfd(proc_dir), buf, O_RDONLY); 3701 if (cmdline_fd == -1) 3702 continue; 3703 cmdline_size = read(cmdline_fd, buf, sizeof(buf) - 1); 3704 close(cmdline_fd); 3705 if (cmdline_size < 0) 3706 continue; 3707 buf[cmdline_size] = '\0'; 3708 for (ssize_t i = 0; i < cmdline_size; i++) { 3709 if (buf[i] == '\0') 3710 buf[i] = ' '; 3711 } 3712 3713 if (printed == 0) 3714 printed += scnprintf(msg, size, "Possible processes:\n"); 3715 3716 printed += scnprintf(msg + printed, size - printed, 3717 "%s %s\n", proc_entry->d_name, buf); 3718 break; 3719 } 3720 } 3721 closedir(fd_dir); 3722 } 3723 closedir(proc_dir); 3724 return printed; 3725 } 3726 3727 int __weak arch_evsel__open_strerror(struct evsel *evsel __maybe_unused, 3728 char *msg __maybe_unused, 3729 size_t size __maybe_unused) 3730 { 3731 return 0; 3732 } 3733 3734 int evsel__open_strerror(struct evsel *evsel, struct target *target, 3735 int err, char *msg, size_t size) 3736 { 3737 char sbuf[STRERR_BUFSIZE]; 3738 int printed = 0, enforced = 0; 3739 int ret; 3740 3741 switch (err) { 3742 case EPERM: 3743 case EACCES: 3744 printed += scnprintf(msg + printed, size - printed, 3745 "Access to performance monitoring and observability operations is limited.\n"); 3746 3747 if (!sysfs__read_int("fs/selinux/enforce", &enforced)) { 3748 if (enforced) { 3749 printed += scnprintf(msg + printed, size - printed, 3750 "Enforced MAC policy settings (SELinux) can limit access to performance\n" 3751 "monitoring and observability operations. Inspect system audit records for\n" 3752 "more perf_event access control information and adjusting the policy.\n"); 3753 } 3754 } 3755 3756 if (err == EPERM) 3757 printed += scnprintf(msg, size, 3758 "No permission to enable %s event.\n\n", evsel__name(evsel)); 3759 3760 return printed + scnprintf(msg + printed, size - printed, 3761 "Consider adjusting /proc/sys/kernel/perf_event_paranoid setting to open\n" 3762 "access to performance monitoring and observability operations for processes\n" 3763 "without CAP_PERFMON, CAP_SYS_PTRACE or CAP_SYS_ADMIN Linux capability.\n" 3764 "More information can be found at 'Perf events and tool security' document:\n" 3765 "https://www.kernel.org/doc/html/latest/admin-guide/perf-security.html\n" 3766 "perf_event_paranoid setting is %d:\n" 3767 " -1: Allow use of (almost) all events by all users\n" 3768 " Ignore mlock limit after perf_event_mlock_kb without CAP_IPC_LOCK\n" 3769 ">= 0: Disallow raw and ftrace function tracepoint access\n" 3770 ">= 1: Disallow CPU event access\n" 3771 ">= 2: Disallow kernel profiling\n" 3772 "To make the adjusted perf_event_paranoid setting permanent preserve it\n" 3773 "in /etc/sysctl.conf (e.g. kernel.perf_event_paranoid = <setting>)", 3774 perf_event_paranoid()); 3775 case ENOENT: 3776 return scnprintf(msg, size, "The %s event is not supported.", evsel__name(evsel)); 3777 case EMFILE: 3778 return scnprintf(msg, size, "%s", 3779 "Too many events are opened.\n" 3780 "Probably the maximum number of open file descriptors has been reached.\n" 3781 "Hint: Try again after reducing the number of events.\n" 3782 "Hint: Try increasing the limit with 'ulimit -n <limit>'"); 3783 case ENOMEM: 3784 if (evsel__has_callchain(evsel) && 3785 access("/proc/sys/kernel/perf_event_max_stack", F_OK) == 0) 3786 return scnprintf(msg, size, 3787 "Not enough memory to setup event with callchain.\n" 3788 "Hint: Try tweaking /proc/sys/kernel/perf_event_max_stack\n" 3789 "Hint: Current value: %d", sysctl__max_stack()); 3790 break; 3791 case ENODEV: 3792 if (target->cpu_list) 3793 return scnprintf(msg, size, "%s", 3794 "No such device - did you specify an out-of-range profile CPU?"); 3795 break; 3796 case EOPNOTSUPP: 3797 if (evsel->core.attr.sample_type & PERF_SAMPLE_BRANCH_STACK) 3798 return scnprintf(msg, size, 3799 "%s: PMU Hardware or event type doesn't support branch stack sampling.", 3800 evsel__name(evsel)); 3801 if (evsel->core.attr.aux_output) 3802 return scnprintf(msg, size, 3803 "%s: PMU Hardware doesn't support 'aux_output' feature", 3804 evsel__name(evsel)); 3805 if (evsel->core.attr.aux_action) 3806 return scnprintf(msg, size, 3807 "%s: PMU Hardware doesn't support 'aux_action' feature", 3808 evsel__name(evsel)); 3809 if (evsel->core.attr.sample_period != 0) 3810 return scnprintf(msg, size, 3811 "%s: PMU Hardware doesn't support sampling/overflow-interrupts. Try 'perf stat'", 3812 evsel__name(evsel)); 3813 if (evsel->core.attr.precise_ip) 3814 return scnprintf(msg, size, "%s", 3815 "\'precise\' request may not be supported. Try removing 'p' modifier."); 3816 #if defined(__i386__) || defined(__x86_64__) 3817 if (evsel->core.attr.type == PERF_TYPE_HARDWARE) 3818 return scnprintf(msg, size, "%s", 3819 "No hardware sampling interrupt available.\n"); 3820 #endif 3821 if (!target__has_cpu(target)) 3822 return scnprintf(msg, size, 3823 "Unsupported event (%s) in per-thread mode, enable system wide with '-a'.", 3824 evsel__name(evsel)); 3825 break; 3826 case EBUSY: 3827 if (find_process("oprofiled")) 3828 return scnprintf(msg, size, 3829 "The PMU counters are busy/taken by another profiler.\n" 3830 "We found oprofile daemon running, please stop it and try again."); 3831 printed += scnprintf( 3832 msg, size, 3833 "The PMU %s counters are busy and in use by another process.\n", 3834 evsel->pmu ? evsel->pmu->name : ""); 3835 return printed + dump_perf_event_processes(msg + printed, size - printed); 3836 break; 3837 case EINVAL: 3838 if (evsel->core.attr.sample_type & PERF_SAMPLE_CODE_PAGE_SIZE && perf_missing_features.code_page_size) 3839 return scnprintf(msg, size, "Asking for the code page size isn't supported by this kernel."); 3840 if (evsel->core.attr.sample_type & PERF_SAMPLE_DATA_PAGE_SIZE && perf_missing_features.data_page_size) 3841 return scnprintf(msg, size, "Asking for the data page size isn't supported by this kernel."); 3842 if (evsel->core.attr.write_backward && perf_missing_features.write_backward) 3843 return scnprintf(msg, size, "Reading from overwrite event is not supported by this kernel."); 3844 if (perf_missing_features.clockid) 3845 return scnprintf(msg, size, "clockid feature not supported."); 3846 if (perf_missing_features.clockid_wrong) 3847 return scnprintf(msg, size, "wrong clockid (%d).", clockid); 3848 if (perf_missing_features.aux_action) 3849 return scnprintf(msg, size, "The 'aux_action' feature is not supported, update the kernel."); 3850 if (perf_missing_features.aux_output) 3851 return scnprintf(msg, size, "The 'aux_output' feature is not supported, update the kernel."); 3852 if (!target__has_cpu(target)) 3853 return scnprintf(msg, size, 3854 "Invalid event (%s) in per-thread mode, enable system wide with '-a'.", 3855 evsel__name(evsel)); 3856 3857 break; 3858 case ENODATA: 3859 return scnprintf(msg, size, "Cannot collect data source with the load latency event alone. " 3860 "Please add an auxiliary event in front of the load latency event."); 3861 default: 3862 break; 3863 } 3864 3865 ret = arch_evsel__open_strerror(evsel, msg, size); 3866 if (ret) 3867 return ret; 3868 3869 return scnprintf(msg, size, 3870 "The sys_perf_event_open() syscall returned with %d (%s) for event (%s).\n" 3871 "\"dmesg | grep -i perf\" may provide additional information.\n", 3872 err, str_error_r(err, sbuf, sizeof(sbuf)), evsel__name(evsel)); 3873 } 3874 3875 struct perf_env *evsel__env(struct evsel *evsel) 3876 { 3877 if (evsel && evsel->evlist && evsel->evlist->env) 3878 return evsel->evlist->env; 3879 return &perf_env; 3880 } 3881 3882 static int store_evsel_ids(struct evsel *evsel, struct evlist *evlist) 3883 { 3884 int cpu_map_idx, thread; 3885 3886 if (evsel__is_retire_lat(evsel)) 3887 return 0; 3888 3889 for (cpu_map_idx = 0; cpu_map_idx < xyarray__max_x(evsel->core.fd); cpu_map_idx++) { 3890 for (thread = 0; thread < xyarray__max_y(evsel->core.fd); 3891 thread++) { 3892 int fd = FD(evsel, cpu_map_idx, thread); 3893 3894 if (perf_evlist__id_add_fd(&evlist->core, &evsel->core, 3895 cpu_map_idx, thread, fd) < 0) 3896 return -1; 3897 } 3898 } 3899 3900 return 0; 3901 } 3902 3903 int evsel__store_ids(struct evsel *evsel, struct evlist *evlist) 3904 { 3905 struct perf_cpu_map *cpus = evsel->core.cpus; 3906 struct perf_thread_map *threads = evsel->core.threads; 3907 3908 if (perf_evsel__alloc_id(&evsel->core, perf_cpu_map__nr(cpus), threads->nr)) 3909 return -ENOMEM; 3910 3911 return store_evsel_ids(evsel, evlist); 3912 } 3913 3914 void evsel__zero_per_pkg(struct evsel *evsel) 3915 { 3916 struct hashmap_entry *cur; 3917 size_t bkt; 3918 3919 if (evsel->per_pkg_mask) { 3920 hashmap__for_each_entry(evsel->per_pkg_mask, cur, bkt) 3921 zfree(&cur->pkey); 3922 3923 hashmap__clear(evsel->per_pkg_mask); 3924 } 3925 } 3926 3927 /** 3928 * evsel__is_hybrid - does the evsel have a known PMU that is hybrid. Note, this 3929 * will be false on hybrid systems for hardware and legacy 3930 * cache events. 3931 */ 3932 bool evsel__is_hybrid(const struct evsel *evsel) 3933 { 3934 if (!evsel->core.is_pmu_core) 3935 return false; 3936 3937 return perf_pmus__num_core_pmus() > 1; 3938 } 3939 3940 struct evsel *evsel__leader(const struct evsel *evsel) 3941 { 3942 return container_of(evsel->core.leader, struct evsel, core); 3943 } 3944 3945 bool evsel__has_leader(struct evsel *evsel, struct evsel *leader) 3946 { 3947 return evsel->core.leader == &leader->core; 3948 } 3949 3950 bool evsel__is_leader(struct evsel *evsel) 3951 { 3952 return evsel__has_leader(evsel, evsel); 3953 } 3954 3955 void evsel__set_leader(struct evsel *evsel, struct evsel *leader) 3956 { 3957 evsel->core.leader = &leader->core; 3958 } 3959 3960 int evsel__source_count(const struct evsel *evsel) 3961 { 3962 struct evsel *pos; 3963 int count = 0; 3964 3965 evlist__for_each_entry(evsel->evlist, pos) { 3966 if (pos->metric_leader == evsel) 3967 count++; 3968 } 3969 return count; 3970 } 3971 3972 bool __weak arch_evsel__must_be_in_group(const struct evsel *evsel __maybe_unused) 3973 { 3974 return false; 3975 } 3976 3977 /* 3978 * Remove an event from a given group (leader). 3979 * Some events, e.g., perf metrics Topdown events, 3980 * must always be grouped. Ignore the events. 3981 */ 3982 void evsel__remove_from_group(struct evsel *evsel, struct evsel *leader) 3983 { 3984 if (!arch_evsel__must_be_in_group(evsel) && evsel != leader) { 3985 evsel__set_leader(evsel, evsel); 3986 evsel->core.nr_members = 0; 3987 leader->core.nr_members--; 3988 } 3989 } 3990 3991 bool evsel__set_needs_uniquify(struct evsel *counter, const struct perf_stat_config *config) 3992 { 3993 struct evsel *evsel; 3994 3995 if (counter->needs_uniquify) { 3996 /* Already set. */ 3997 return true; 3998 } 3999 4000 if (counter->use_config_name || counter->is_libpfm_event) { 4001 /* Original name will be used. */ 4002 return false; 4003 } 4004 4005 if (!config->hybrid_merge && evsel__is_hybrid(counter)) { 4006 /* Unique hybrid counters necessary. */ 4007 counter->needs_uniquify = true; 4008 return true; 4009 } 4010 4011 if (counter->core.attr.type < PERF_TYPE_MAX && counter->core.attr.type != PERF_TYPE_RAW) { 4012 /* Legacy event, don't uniquify. */ 4013 return false; 4014 } 4015 4016 if (counter->pmu && counter->pmu->is_core && 4017 counter->alternate_hw_config != PERF_COUNT_HW_MAX) { 4018 /* A sysfs or json event replacing a legacy event, don't uniquify. */ 4019 return false; 4020 } 4021 4022 if (config->aggr_mode == AGGR_NONE) { 4023 /* Always unique with no aggregation. */ 4024 counter->needs_uniquify = true; 4025 return true; 4026 } 4027 4028 if (counter->first_wildcard_match != NULL) { 4029 /* 4030 * If stats are merged then only the first_wildcard_match is 4031 * displayed, there is no need to uniquify this evsel as the 4032 * name won't be shown. 4033 */ 4034 return false; 4035 } 4036 4037 /* 4038 * Do other non-merged events in the evlist have the same name? If so 4039 * uniquify is necessary. 4040 */ 4041 evlist__for_each_entry(counter->evlist, evsel) { 4042 if (evsel == counter || evsel->first_wildcard_match || evsel->pmu == counter->pmu) 4043 continue; 4044 4045 if (evsel__name_is(counter, evsel__name(evsel))) { 4046 counter->needs_uniquify = true; 4047 return true; 4048 } 4049 } 4050 return false; 4051 } 4052 4053 void evsel__uniquify_counter(struct evsel *counter) 4054 { 4055 const char *name, *pmu_name; 4056 char *new_name, *config; 4057 int ret; 4058 4059 /* No uniquification necessary. */ 4060 if (!counter->needs_uniquify) 4061 return; 4062 4063 /* The evsel was already uniquified. */ 4064 if (counter->uniquified_name) 4065 return; 4066 4067 /* Avoid checking to uniquify twice. */ 4068 counter->uniquified_name = true; 4069 4070 name = evsel__name(counter); 4071 pmu_name = counter->pmu->name; 4072 /* Already prefixed by the PMU name. */ 4073 if (!strncmp(name, pmu_name, strlen(pmu_name))) 4074 return; 4075 4076 config = strchr(name, '/'); 4077 if (config) { 4078 int len = config - name; 4079 4080 if (config[1] == '/') { 4081 /* case: event// */ 4082 ret = asprintf(&new_name, "%s/%.*s/%s", pmu_name, len, name, config + 2); 4083 } else { 4084 /* case: event/.../ */ 4085 ret = asprintf(&new_name, "%s/%.*s,%s", pmu_name, len, name, config + 1); 4086 } 4087 } else { 4088 config = strchr(name, ':'); 4089 if (config) { 4090 /* case: event:.. */ 4091 int len = config - name; 4092 4093 ret = asprintf(&new_name, "%s/%.*s/%s", pmu_name, len, name, config + 1); 4094 } else { 4095 /* case: event */ 4096 ret = asprintf(&new_name, "%s/%s/", pmu_name, name); 4097 } 4098 } 4099 if (ret > 0) { 4100 free(counter->name); 4101 counter->name = new_name; 4102 } else { 4103 /* ENOMEM from asprintf. */ 4104 counter->uniquified_name = false; 4105 } 4106 } 4107 4108 void evsel__warn_user_requested_cpus(struct evsel *evsel, struct perf_cpu_map *user_requested_cpus) 4109 { 4110 struct perf_cpu_map *intersect, *online = NULL; 4111 const struct perf_pmu *pmu = evsel__find_pmu(evsel); 4112 4113 if (pmu && pmu->is_core) { 4114 intersect = perf_cpu_map__intersect(pmu->cpus, user_requested_cpus); 4115 } else { 4116 online = cpu_map__online(); 4117 intersect = perf_cpu_map__intersect(online, user_requested_cpus); 4118 } 4119 if (!perf_cpu_map__equal(intersect, user_requested_cpus)) { 4120 char buf1[128]; 4121 char buf2[128]; 4122 4123 cpu_map__snprint(user_requested_cpus, buf1, sizeof(buf1)); 4124 cpu_map__snprint(online ?: pmu->cpus, buf2, sizeof(buf2)); 4125 pr_warning("WARNING: A requested CPU in '%s' is not supported by PMU '%s' (CPUs %s) for event '%s'\n", 4126 buf1, pmu ? pmu->name : "cpu", buf2, evsel__name(evsel)); 4127 } 4128 perf_cpu_map__put(intersect); 4129 perf_cpu_map__put(online); 4130 } 4131