| 1 | /* |
| 2 | * Copyright (C) 2011, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> |
| 3 | * |
| 4 | * Parts came from builtin-{top,stat,record}.c, see those files for further |
| 5 | * copyright notes. |
| 6 | * |
| 7 | * Released under the GPL v2. (and only v2, not any later version) |
| 8 | */ |
| 9 | #include "util.h" |
| 10 | #include <lk/debugfs.h> |
| 11 | #include <poll.h> |
| 12 | #include "cpumap.h" |
| 13 | #include "thread_map.h" |
| 14 | #include "target.h" |
| 15 | #include "evlist.h" |
| 16 | #include "evsel.h" |
| 17 | #include <unistd.h> |
| 18 | |
| 19 | #include "parse-events.h" |
| 20 | |
| 21 | #include <sys/mman.h> |
| 22 | |
| 23 | #include <linux/bitops.h> |
| 24 | #include <linux/hash.h> |
| 25 | |
| 26 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
| 27 | #define SID(e, x, y) xyarray__entry(e->sample_id, x, y) |
| 28 | |
| 29 | void perf_evlist__init(struct perf_evlist *evlist, struct cpu_map *cpus, |
| 30 | struct thread_map *threads) |
| 31 | { |
| 32 | int i; |
| 33 | |
| 34 | for (i = 0; i < PERF_EVLIST__HLIST_SIZE; ++i) |
| 35 | INIT_HLIST_HEAD(&evlist->heads[i]); |
| 36 | INIT_LIST_HEAD(&evlist->entries); |
| 37 | perf_evlist__set_maps(evlist, cpus, threads); |
| 38 | evlist->workload.pid = -1; |
| 39 | } |
| 40 | |
| 41 | struct perf_evlist *perf_evlist__new(void) |
| 42 | { |
| 43 | struct perf_evlist *evlist = zalloc(sizeof(*evlist)); |
| 44 | |
| 45 | if (evlist != NULL) |
| 46 | perf_evlist__init(evlist, NULL, NULL); |
| 47 | |
| 48 | return evlist; |
| 49 | } |
| 50 | |
| 51 | void perf_evlist__config(struct perf_evlist *evlist, |
| 52 | struct perf_record_opts *opts) |
| 53 | { |
| 54 | struct perf_evsel *evsel; |
| 55 | /* |
| 56 | * Set the evsel leader links before we configure attributes, |
| 57 | * since some might depend on this info. |
| 58 | */ |
| 59 | if (opts->group) |
| 60 | perf_evlist__set_leader(evlist); |
| 61 | |
| 62 | if (evlist->cpus->map[0] < 0) |
| 63 | opts->no_inherit = true; |
| 64 | |
| 65 | list_for_each_entry(evsel, &evlist->entries, node) { |
| 66 | perf_evsel__config(evsel, opts); |
| 67 | |
| 68 | if (evlist->nr_entries > 1) |
| 69 | perf_evsel__set_sample_id(evsel); |
| 70 | } |
| 71 | } |
| 72 | |
| 73 | static void perf_evlist__purge(struct perf_evlist *evlist) |
| 74 | { |
| 75 | struct perf_evsel *pos, *n; |
| 76 | |
| 77 | list_for_each_entry_safe(pos, n, &evlist->entries, node) { |
| 78 | list_del_init(&pos->node); |
| 79 | perf_evsel__delete(pos); |
| 80 | } |
| 81 | |
| 82 | evlist->nr_entries = 0; |
| 83 | } |
| 84 | |
| 85 | void perf_evlist__exit(struct perf_evlist *evlist) |
| 86 | { |
| 87 | free(evlist->mmap); |
| 88 | free(evlist->pollfd); |
| 89 | evlist->mmap = NULL; |
| 90 | evlist->pollfd = NULL; |
| 91 | } |
| 92 | |
| 93 | void perf_evlist__delete(struct perf_evlist *evlist) |
| 94 | { |
| 95 | perf_evlist__purge(evlist); |
| 96 | perf_evlist__exit(evlist); |
| 97 | free(evlist); |
| 98 | } |
| 99 | |
| 100 | void perf_evlist__add(struct perf_evlist *evlist, struct perf_evsel *entry) |
| 101 | { |
| 102 | list_add_tail(&entry->node, &evlist->entries); |
| 103 | ++evlist->nr_entries; |
| 104 | } |
| 105 | |
| 106 | void perf_evlist__splice_list_tail(struct perf_evlist *evlist, |
| 107 | struct list_head *list, |
| 108 | int nr_entries) |
| 109 | { |
| 110 | list_splice_tail(list, &evlist->entries); |
| 111 | evlist->nr_entries += nr_entries; |
| 112 | } |
| 113 | |
| 114 | void __perf_evlist__set_leader(struct list_head *list) |
| 115 | { |
| 116 | struct perf_evsel *evsel, *leader; |
| 117 | |
| 118 | leader = list_entry(list->next, struct perf_evsel, node); |
| 119 | evsel = list_entry(list->prev, struct perf_evsel, node); |
| 120 | |
| 121 | leader->nr_members = evsel->idx - leader->idx + 1; |
| 122 | |
| 123 | list_for_each_entry(evsel, list, node) { |
| 124 | evsel->leader = leader; |
| 125 | } |
| 126 | } |
| 127 | |
| 128 | void perf_evlist__set_leader(struct perf_evlist *evlist) |
| 129 | { |
| 130 | if (evlist->nr_entries) { |
| 131 | evlist->nr_groups = evlist->nr_entries > 1 ? 1 : 0; |
| 132 | __perf_evlist__set_leader(&evlist->entries); |
| 133 | } |
| 134 | } |
| 135 | |
| 136 | int perf_evlist__add_default(struct perf_evlist *evlist) |
| 137 | { |
| 138 | struct perf_event_attr attr = { |
| 139 | .type = PERF_TYPE_HARDWARE, |
| 140 | .config = PERF_COUNT_HW_CPU_CYCLES, |
| 141 | }; |
| 142 | struct perf_evsel *evsel; |
| 143 | |
| 144 | event_attr_init(&attr); |
| 145 | |
| 146 | evsel = perf_evsel__new(&attr, 0); |
| 147 | if (evsel == NULL) |
| 148 | goto error; |
| 149 | |
| 150 | /* use strdup() because free(evsel) assumes name is allocated */ |
| 151 | evsel->name = strdup("cycles"); |
| 152 | if (!evsel->name) |
| 153 | goto error_free; |
| 154 | |
| 155 | perf_evlist__add(evlist, evsel); |
| 156 | return 0; |
| 157 | error_free: |
| 158 | perf_evsel__delete(evsel); |
| 159 | error: |
| 160 | return -ENOMEM; |
| 161 | } |
| 162 | |
| 163 | static int perf_evlist__add_attrs(struct perf_evlist *evlist, |
| 164 | struct perf_event_attr *attrs, size_t nr_attrs) |
| 165 | { |
| 166 | struct perf_evsel *evsel, *n; |
| 167 | LIST_HEAD(head); |
| 168 | size_t i; |
| 169 | |
| 170 | for (i = 0; i < nr_attrs; i++) { |
| 171 | evsel = perf_evsel__new(attrs + i, evlist->nr_entries + i); |
| 172 | if (evsel == NULL) |
| 173 | goto out_delete_partial_list; |
| 174 | list_add_tail(&evsel->node, &head); |
| 175 | } |
| 176 | |
| 177 | perf_evlist__splice_list_tail(evlist, &head, nr_attrs); |
| 178 | |
| 179 | return 0; |
| 180 | |
| 181 | out_delete_partial_list: |
| 182 | list_for_each_entry_safe(evsel, n, &head, node) |
| 183 | perf_evsel__delete(evsel); |
| 184 | return -1; |
| 185 | } |
| 186 | |
| 187 | int __perf_evlist__add_default_attrs(struct perf_evlist *evlist, |
| 188 | struct perf_event_attr *attrs, size_t nr_attrs) |
| 189 | { |
| 190 | size_t i; |
| 191 | |
| 192 | for (i = 0; i < nr_attrs; i++) |
| 193 | event_attr_init(attrs + i); |
| 194 | |
| 195 | return perf_evlist__add_attrs(evlist, attrs, nr_attrs); |
| 196 | } |
| 197 | |
| 198 | struct perf_evsel * |
| 199 | perf_evlist__find_tracepoint_by_id(struct perf_evlist *evlist, int id) |
| 200 | { |
| 201 | struct perf_evsel *evsel; |
| 202 | |
| 203 | list_for_each_entry(evsel, &evlist->entries, node) { |
| 204 | if (evsel->attr.type == PERF_TYPE_TRACEPOINT && |
| 205 | (int)evsel->attr.config == id) |
| 206 | return evsel; |
| 207 | } |
| 208 | |
| 209 | return NULL; |
| 210 | } |
| 211 | |
| 212 | int perf_evlist__add_newtp(struct perf_evlist *evlist, |
| 213 | const char *sys, const char *name, void *handler) |
| 214 | { |
| 215 | struct perf_evsel *evsel; |
| 216 | |
| 217 | evsel = perf_evsel__newtp(sys, name, evlist->nr_entries); |
| 218 | if (evsel == NULL) |
| 219 | return -1; |
| 220 | |
| 221 | evsel->handler.func = handler; |
| 222 | perf_evlist__add(evlist, evsel); |
| 223 | return 0; |
| 224 | } |
| 225 | |
| 226 | void perf_evlist__disable(struct perf_evlist *evlist) |
| 227 | { |
| 228 | int cpu, thread; |
| 229 | struct perf_evsel *pos; |
| 230 | int nr_cpus = cpu_map__nr(evlist->cpus); |
| 231 | int nr_threads = thread_map__nr(evlist->threads); |
| 232 | |
| 233 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
| 234 | list_for_each_entry(pos, &evlist->entries, node) { |
| 235 | if (!perf_evsel__is_group_leader(pos)) |
| 236 | continue; |
| 237 | for (thread = 0; thread < nr_threads; thread++) |
| 238 | ioctl(FD(pos, cpu, thread), |
| 239 | PERF_EVENT_IOC_DISABLE, 0); |
| 240 | } |
| 241 | } |
| 242 | } |
| 243 | |
| 244 | void perf_evlist__enable(struct perf_evlist *evlist) |
| 245 | { |
| 246 | int cpu, thread; |
| 247 | struct perf_evsel *pos; |
| 248 | int nr_cpus = cpu_map__nr(evlist->cpus); |
| 249 | int nr_threads = thread_map__nr(evlist->threads); |
| 250 | |
| 251 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
| 252 | list_for_each_entry(pos, &evlist->entries, node) { |
| 253 | if (!perf_evsel__is_group_leader(pos)) |
| 254 | continue; |
| 255 | for (thread = 0; thread < nr_threads; thread++) |
| 256 | ioctl(FD(pos, cpu, thread), |
| 257 | PERF_EVENT_IOC_ENABLE, 0); |
| 258 | } |
| 259 | } |
| 260 | } |
| 261 | |
| 262 | static int perf_evlist__alloc_pollfd(struct perf_evlist *evlist) |
| 263 | { |
| 264 | int nr_cpus = cpu_map__nr(evlist->cpus); |
| 265 | int nr_threads = thread_map__nr(evlist->threads); |
| 266 | int nfds = nr_cpus * nr_threads * evlist->nr_entries; |
| 267 | evlist->pollfd = malloc(sizeof(struct pollfd) * nfds); |
| 268 | return evlist->pollfd != NULL ? 0 : -ENOMEM; |
| 269 | } |
| 270 | |
| 271 | void perf_evlist__add_pollfd(struct perf_evlist *evlist, int fd) |
| 272 | { |
| 273 | fcntl(fd, F_SETFL, O_NONBLOCK); |
| 274 | evlist->pollfd[evlist->nr_fds].fd = fd; |
| 275 | evlist->pollfd[evlist->nr_fds].events = POLLIN; |
| 276 | evlist->nr_fds++; |
| 277 | } |
| 278 | |
| 279 | static void perf_evlist__id_hash(struct perf_evlist *evlist, |
| 280 | struct perf_evsel *evsel, |
| 281 | int cpu, int thread, u64 id) |
| 282 | { |
| 283 | int hash; |
| 284 | struct perf_sample_id *sid = SID(evsel, cpu, thread); |
| 285 | |
| 286 | sid->id = id; |
| 287 | sid->evsel = evsel; |
| 288 | hash = hash_64(sid->id, PERF_EVLIST__HLIST_BITS); |
| 289 | hlist_add_head(&sid->node, &evlist->heads[hash]); |
| 290 | } |
| 291 | |
| 292 | void perf_evlist__id_add(struct perf_evlist *evlist, struct perf_evsel *evsel, |
| 293 | int cpu, int thread, u64 id) |
| 294 | { |
| 295 | perf_evlist__id_hash(evlist, evsel, cpu, thread, id); |
| 296 | evsel->id[evsel->ids++] = id; |
| 297 | } |
| 298 | |
| 299 | static int perf_evlist__id_add_fd(struct perf_evlist *evlist, |
| 300 | struct perf_evsel *evsel, |
| 301 | int cpu, int thread, int fd) |
| 302 | { |
| 303 | u64 read_data[4] = { 0, }; |
| 304 | int id_idx = 1; /* The first entry is the counter value */ |
| 305 | |
| 306 | if (!(evsel->attr.read_format & PERF_FORMAT_ID) || |
| 307 | read(fd, &read_data, sizeof(read_data)) == -1) |
| 308 | return -1; |
| 309 | |
| 310 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_ENABLED) |
| 311 | ++id_idx; |
| 312 | if (evsel->attr.read_format & PERF_FORMAT_TOTAL_TIME_RUNNING) |
| 313 | ++id_idx; |
| 314 | |
| 315 | perf_evlist__id_add(evlist, evsel, cpu, thread, read_data[id_idx]); |
| 316 | return 0; |
| 317 | } |
| 318 | |
| 319 | struct perf_evsel *perf_evlist__id2evsel(struct perf_evlist *evlist, u64 id) |
| 320 | { |
| 321 | struct hlist_head *head; |
| 322 | struct hlist_node *pos; |
| 323 | struct perf_sample_id *sid; |
| 324 | int hash; |
| 325 | |
| 326 | if (evlist->nr_entries == 1) |
| 327 | return perf_evlist__first(evlist); |
| 328 | |
| 329 | hash = hash_64(id, PERF_EVLIST__HLIST_BITS); |
| 330 | head = &evlist->heads[hash]; |
| 331 | |
| 332 | hlist_for_each_entry(sid, pos, head, node) |
| 333 | if (sid->id == id) |
| 334 | return sid->evsel; |
| 335 | |
| 336 | if (!perf_evlist__sample_id_all(evlist)) |
| 337 | return perf_evlist__first(evlist); |
| 338 | |
| 339 | return NULL; |
| 340 | } |
| 341 | |
| 342 | union perf_event *perf_evlist__mmap_read(struct perf_evlist *evlist, int idx) |
| 343 | { |
| 344 | struct perf_mmap *md = &evlist->mmap[idx]; |
| 345 | unsigned int head = perf_mmap__read_head(md); |
| 346 | unsigned int old = md->prev; |
| 347 | unsigned char *data = md->base + page_size; |
| 348 | union perf_event *event = NULL; |
| 349 | |
| 350 | if (evlist->overwrite) { |
| 351 | /* |
| 352 | * If we're further behind than half the buffer, there's a chance |
| 353 | * the writer will bite our tail and mess up the samples under us. |
| 354 | * |
| 355 | * If we somehow ended up ahead of the head, we got messed up. |
| 356 | * |
| 357 | * In either case, truncate and restart at head. |
| 358 | */ |
| 359 | int diff = head - old; |
| 360 | if (diff > md->mask / 2 || diff < 0) { |
| 361 | fprintf(stderr, "WARNING: failed to keep up with mmap data.\n"); |
| 362 | |
| 363 | /* |
| 364 | * head points to a known good entry, start there. |
| 365 | */ |
| 366 | old = head; |
| 367 | } |
| 368 | } |
| 369 | |
| 370 | if (old != head) { |
| 371 | size_t size; |
| 372 | |
| 373 | event = (union perf_event *)&data[old & md->mask]; |
| 374 | size = event->header.size; |
| 375 | |
| 376 | /* |
| 377 | * Event straddles the mmap boundary -- header should always |
| 378 | * be inside due to u64 alignment of output. |
| 379 | */ |
| 380 | if ((old & md->mask) + size != ((old + size) & md->mask)) { |
| 381 | unsigned int offset = old; |
| 382 | unsigned int len = min(sizeof(*event), size), cpy; |
| 383 | void *dst = &md->event_copy; |
| 384 | |
| 385 | do { |
| 386 | cpy = min(md->mask + 1 - (offset & md->mask), len); |
| 387 | memcpy(dst, &data[offset & md->mask], cpy); |
| 388 | offset += cpy; |
| 389 | dst += cpy; |
| 390 | len -= cpy; |
| 391 | } while (len); |
| 392 | |
| 393 | event = &md->event_copy; |
| 394 | } |
| 395 | |
| 396 | old += size; |
| 397 | } |
| 398 | |
| 399 | md->prev = old; |
| 400 | |
| 401 | if (!evlist->overwrite) |
| 402 | perf_mmap__write_tail(md, old); |
| 403 | |
| 404 | return event; |
| 405 | } |
| 406 | |
| 407 | void perf_evlist__munmap(struct perf_evlist *evlist) |
| 408 | { |
| 409 | int i; |
| 410 | |
| 411 | for (i = 0; i < evlist->nr_mmaps; i++) { |
| 412 | if (evlist->mmap[i].base != NULL) { |
| 413 | munmap(evlist->mmap[i].base, evlist->mmap_len); |
| 414 | evlist->mmap[i].base = NULL; |
| 415 | } |
| 416 | } |
| 417 | |
| 418 | free(evlist->mmap); |
| 419 | evlist->mmap = NULL; |
| 420 | } |
| 421 | |
| 422 | static int perf_evlist__alloc_mmap(struct perf_evlist *evlist) |
| 423 | { |
| 424 | evlist->nr_mmaps = cpu_map__nr(evlist->cpus); |
| 425 | if (cpu_map__all(evlist->cpus)) |
| 426 | evlist->nr_mmaps = thread_map__nr(evlist->threads); |
| 427 | evlist->mmap = zalloc(evlist->nr_mmaps * sizeof(struct perf_mmap)); |
| 428 | return evlist->mmap != NULL ? 0 : -ENOMEM; |
| 429 | } |
| 430 | |
| 431 | static int __perf_evlist__mmap(struct perf_evlist *evlist, |
| 432 | int idx, int prot, int mask, int fd) |
| 433 | { |
| 434 | evlist->mmap[idx].prev = 0; |
| 435 | evlist->mmap[idx].mask = mask; |
| 436 | evlist->mmap[idx].base = mmap(NULL, evlist->mmap_len, prot, |
| 437 | MAP_SHARED, fd, 0); |
| 438 | if (evlist->mmap[idx].base == MAP_FAILED) { |
| 439 | evlist->mmap[idx].base = NULL; |
| 440 | return -1; |
| 441 | } |
| 442 | |
| 443 | perf_evlist__add_pollfd(evlist, fd); |
| 444 | return 0; |
| 445 | } |
| 446 | |
| 447 | static int perf_evlist__mmap_per_cpu(struct perf_evlist *evlist, int prot, int mask) |
| 448 | { |
| 449 | struct perf_evsel *evsel; |
| 450 | int cpu, thread; |
| 451 | int nr_cpus = cpu_map__nr(evlist->cpus); |
| 452 | int nr_threads = thread_map__nr(evlist->threads); |
| 453 | |
| 454 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
| 455 | int output = -1; |
| 456 | |
| 457 | for (thread = 0; thread < nr_threads; thread++) { |
| 458 | list_for_each_entry(evsel, &evlist->entries, node) { |
| 459 | int fd = FD(evsel, cpu, thread); |
| 460 | |
| 461 | if (output == -1) { |
| 462 | output = fd; |
| 463 | if (__perf_evlist__mmap(evlist, cpu, |
| 464 | prot, mask, output) < 0) |
| 465 | goto out_unmap; |
| 466 | } else { |
| 467 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, output) != 0) |
| 468 | goto out_unmap; |
| 469 | } |
| 470 | |
| 471 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
| 472 | perf_evlist__id_add_fd(evlist, evsel, cpu, thread, fd) < 0) |
| 473 | goto out_unmap; |
| 474 | } |
| 475 | } |
| 476 | } |
| 477 | |
| 478 | return 0; |
| 479 | |
| 480 | out_unmap: |
| 481 | for (cpu = 0; cpu < nr_cpus; cpu++) { |
| 482 | if (evlist->mmap[cpu].base != NULL) { |
| 483 | munmap(evlist->mmap[cpu].base, evlist->mmap_len); |
| 484 | evlist->mmap[cpu].base = NULL; |
| 485 | } |
| 486 | } |
| 487 | return -1; |
| 488 | } |
| 489 | |
| 490 | static int perf_evlist__mmap_per_thread(struct perf_evlist *evlist, int prot, int mask) |
| 491 | { |
| 492 | struct perf_evsel *evsel; |
| 493 | int thread; |
| 494 | int nr_threads = thread_map__nr(evlist->threads); |
| 495 | |
| 496 | for (thread = 0; thread < nr_threads; thread++) { |
| 497 | int output = -1; |
| 498 | |
| 499 | list_for_each_entry(evsel, &evlist->entries, node) { |
| 500 | int fd = FD(evsel, 0, thread); |
| 501 | |
| 502 | if (output == -1) { |
| 503 | output = fd; |
| 504 | if (__perf_evlist__mmap(evlist, thread, |
| 505 | prot, mask, output) < 0) |
| 506 | goto out_unmap; |
| 507 | } else { |
| 508 | if (ioctl(fd, PERF_EVENT_IOC_SET_OUTPUT, output) != 0) |
| 509 | goto out_unmap; |
| 510 | } |
| 511 | |
| 512 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
| 513 | perf_evlist__id_add_fd(evlist, evsel, 0, thread, fd) < 0) |
| 514 | goto out_unmap; |
| 515 | } |
| 516 | } |
| 517 | |
| 518 | return 0; |
| 519 | |
| 520 | out_unmap: |
| 521 | for (thread = 0; thread < nr_threads; thread++) { |
| 522 | if (evlist->mmap[thread].base != NULL) { |
| 523 | munmap(evlist->mmap[thread].base, evlist->mmap_len); |
| 524 | evlist->mmap[thread].base = NULL; |
| 525 | } |
| 526 | } |
| 527 | return -1; |
| 528 | } |
| 529 | |
| 530 | /** perf_evlist__mmap - Create per cpu maps to receive events |
| 531 | * |
| 532 | * @evlist - list of events |
| 533 | * @pages - map length in pages |
| 534 | * @overwrite - overwrite older events? |
| 535 | * |
| 536 | * If overwrite is false the user needs to signal event consuption using: |
| 537 | * |
| 538 | * struct perf_mmap *m = &evlist->mmap[cpu]; |
| 539 | * unsigned int head = perf_mmap__read_head(m); |
| 540 | * |
| 541 | * perf_mmap__write_tail(m, head) |
| 542 | * |
| 543 | * Using perf_evlist__read_on_cpu does this automatically. |
| 544 | */ |
| 545 | int perf_evlist__mmap(struct perf_evlist *evlist, unsigned int pages, |
| 546 | bool overwrite) |
| 547 | { |
| 548 | struct perf_evsel *evsel; |
| 549 | const struct cpu_map *cpus = evlist->cpus; |
| 550 | const struct thread_map *threads = evlist->threads; |
| 551 | int prot = PROT_READ | (overwrite ? 0 : PROT_WRITE), mask; |
| 552 | |
| 553 | /* 512 kiB: default amount of unprivileged mlocked memory */ |
| 554 | if (pages == UINT_MAX) |
| 555 | pages = (512 * 1024) / page_size; |
| 556 | else if (!is_power_of_2(pages)) |
| 557 | return -EINVAL; |
| 558 | |
| 559 | mask = pages * page_size - 1; |
| 560 | |
| 561 | if (evlist->mmap == NULL && perf_evlist__alloc_mmap(evlist) < 0) |
| 562 | return -ENOMEM; |
| 563 | |
| 564 | if (evlist->pollfd == NULL && perf_evlist__alloc_pollfd(evlist) < 0) |
| 565 | return -ENOMEM; |
| 566 | |
| 567 | evlist->overwrite = overwrite; |
| 568 | evlist->mmap_len = (pages + 1) * page_size; |
| 569 | |
| 570 | list_for_each_entry(evsel, &evlist->entries, node) { |
| 571 | if ((evsel->attr.read_format & PERF_FORMAT_ID) && |
| 572 | evsel->sample_id == NULL && |
| 573 | perf_evsel__alloc_id(evsel, cpu_map__nr(cpus), threads->nr) < 0) |
| 574 | return -ENOMEM; |
| 575 | } |
| 576 | |
| 577 | if (cpu_map__all(cpus)) |
| 578 | return perf_evlist__mmap_per_thread(evlist, prot, mask); |
| 579 | |
| 580 | return perf_evlist__mmap_per_cpu(evlist, prot, mask); |
| 581 | } |
| 582 | |
| 583 | int perf_evlist__create_maps(struct perf_evlist *evlist, |
| 584 | struct perf_target *target) |
| 585 | { |
| 586 | evlist->threads = thread_map__new_str(target->pid, target->tid, |
| 587 | target->uid); |
| 588 | |
| 589 | if (evlist->threads == NULL) |
| 590 | return -1; |
| 591 | |
| 592 | if (perf_target__has_task(target)) |
| 593 | evlist->cpus = cpu_map__dummy_new(); |
| 594 | else if (!perf_target__has_cpu(target) && !target->uses_mmap) |
| 595 | evlist->cpus = cpu_map__dummy_new(); |
| 596 | else |
| 597 | evlist->cpus = cpu_map__new(target->cpu_list); |
| 598 | |
| 599 | if (evlist->cpus == NULL) |
| 600 | goto out_delete_threads; |
| 601 | |
| 602 | return 0; |
| 603 | |
| 604 | out_delete_threads: |
| 605 | thread_map__delete(evlist->threads); |
| 606 | return -1; |
| 607 | } |
| 608 | |
| 609 | void perf_evlist__delete_maps(struct perf_evlist *evlist) |
| 610 | { |
| 611 | cpu_map__delete(evlist->cpus); |
| 612 | thread_map__delete(evlist->threads); |
| 613 | evlist->cpus = NULL; |
| 614 | evlist->threads = NULL; |
| 615 | } |
| 616 | |
| 617 | int perf_evlist__apply_filters(struct perf_evlist *evlist) |
| 618 | { |
| 619 | struct perf_evsel *evsel; |
| 620 | int err = 0; |
| 621 | const int ncpus = cpu_map__nr(evlist->cpus), |
| 622 | nthreads = thread_map__nr(evlist->threads); |
| 623 | |
| 624 | list_for_each_entry(evsel, &evlist->entries, node) { |
| 625 | if (evsel->filter == NULL) |
| 626 | continue; |
| 627 | |
| 628 | err = perf_evsel__set_filter(evsel, ncpus, nthreads, evsel->filter); |
| 629 | if (err) |
| 630 | break; |
| 631 | } |
| 632 | |
| 633 | return err; |
| 634 | } |
| 635 | |
| 636 | int perf_evlist__set_filter(struct perf_evlist *evlist, const char *filter) |
| 637 | { |
| 638 | struct perf_evsel *evsel; |
| 639 | int err = 0; |
| 640 | const int ncpus = cpu_map__nr(evlist->cpus), |
| 641 | nthreads = thread_map__nr(evlist->threads); |
| 642 | |
| 643 | list_for_each_entry(evsel, &evlist->entries, node) { |
| 644 | err = perf_evsel__set_filter(evsel, ncpus, nthreads, filter); |
| 645 | if (err) |
| 646 | break; |
| 647 | } |
| 648 | |
| 649 | return err; |
| 650 | } |
| 651 | |
| 652 | bool perf_evlist__valid_sample_type(struct perf_evlist *evlist) |
| 653 | { |
| 654 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
| 655 | |
| 656 | list_for_each_entry_continue(pos, &evlist->entries, node) { |
| 657 | if (first->attr.sample_type != pos->attr.sample_type) |
| 658 | return false; |
| 659 | } |
| 660 | |
| 661 | return true; |
| 662 | } |
| 663 | |
| 664 | u64 perf_evlist__sample_type(struct perf_evlist *evlist) |
| 665 | { |
| 666 | struct perf_evsel *first = perf_evlist__first(evlist); |
| 667 | return first->attr.sample_type; |
| 668 | } |
| 669 | |
| 670 | u16 perf_evlist__id_hdr_size(struct perf_evlist *evlist) |
| 671 | { |
| 672 | struct perf_evsel *first = perf_evlist__first(evlist); |
| 673 | struct perf_sample *data; |
| 674 | u64 sample_type; |
| 675 | u16 size = 0; |
| 676 | |
| 677 | if (!first->attr.sample_id_all) |
| 678 | goto out; |
| 679 | |
| 680 | sample_type = first->attr.sample_type; |
| 681 | |
| 682 | if (sample_type & PERF_SAMPLE_TID) |
| 683 | size += sizeof(data->tid) * 2; |
| 684 | |
| 685 | if (sample_type & PERF_SAMPLE_TIME) |
| 686 | size += sizeof(data->time); |
| 687 | |
| 688 | if (sample_type & PERF_SAMPLE_ID) |
| 689 | size += sizeof(data->id); |
| 690 | |
| 691 | if (sample_type & PERF_SAMPLE_STREAM_ID) |
| 692 | size += sizeof(data->stream_id); |
| 693 | |
| 694 | if (sample_type & PERF_SAMPLE_CPU) |
| 695 | size += sizeof(data->cpu) * 2; |
| 696 | out: |
| 697 | return size; |
| 698 | } |
| 699 | |
| 700 | bool perf_evlist__valid_sample_id_all(struct perf_evlist *evlist) |
| 701 | { |
| 702 | struct perf_evsel *first = perf_evlist__first(evlist), *pos = first; |
| 703 | |
| 704 | list_for_each_entry_continue(pos, &evlist->entries, node) { |
| 705 | if (first->attr.sample_id_all != pos->attr.sample_id_all) |
| 706 | return false; |
| 707 | } |
| 708 | |
| 709 | return true; |
| 710 | } |
| 711 | |
| 712 | bool perf_evlist__sample_id_all(struct perf_evlist *evlist) |
| 713 | { |
| 714 | struct perf_evsel *first = perf_evlist__first(evlist); |
| 715 | return first->attr.sample_id_all; |
| 716 | } |
| 717 | |
| 718 | void perf_evlist__set_selected(struct perf_evlist *evlist, |
| 719 | struct perf_evsel *evsel) |
| 720 | { |
| 721 | evlist->selected = evsel; |
| 722 | } |
| 723 | |
| 724 | int perf_evlist__open(struct perf_evlist *evlist) |
| 725 | { |
| 726 | struct perf_evsel *evsel; |
| 727 | int err, ncpus, nthreads; |
| 728 | |
| 729 | list_for_each_entry(evsel, &evlist->entries, node) { |
| 730 | err = perf_evsel__open(evsel, evlist->cpus, evlist->threads); |
| 731 | if (err < 0) |
| 732 | goto out_err; |
| 733 | } |
| 734 | |
| 735 | return 0; |
| 736 | out_err: |
| 737 | ncpus = cpu_map__nr(evlist->cpus); |
| 738 | nthreads = thread_map__nr(evlist->threads); |
| 739 | |
| 740 | list_for_each_entry_reverse(evsel, &evlist->entries, node) |
| 741 | perf_evsel__close(evsel, ncpus, nthreads); |
| 742 | |
| 743 | errno = -err; |
| 744 | return err; |
| 745 | } |
| 746 | |
| 747 | int perf_evlist__prepare_workload(struct perf_evlist *evlist, |
| 748 | struct perf_target *target, |
| 749 | const char *argv[], bool pipe_output) |
| 750 | { |
| 751 | int child_ready_pipe[2], go_pipe[2]; |
| 752 | char bf; |
| 753 | |
| 754 | if (pipe(child_ready_pipe) < 0) { |
| 755 | perror("failed to create 'ready' pipe"); |
| 756 | return -1; |
| 757 | } |
| 758 | |
| 759 | if (pipe(go_pipe) < 0) { |
| 760 | perror("failed to create 'go' pipe"); |
| 761 | goto out_close_ready_pipe; |
| 762 | } |
| 763 | |
| 764 | evlist->workload.pid = fork(); |
| 765 | if (evlist->workload.pid < 0) { |
| 766 | perror("failed to fork"); |
| 767 | goto out_close_pipes; |
| 768 | } |
| 769 | |
| 770 | if (!evlist->workload.pid) { |
| 771 | if (pipe_output) |
| 772 | dup2(2, 1); |
| 773 | |
| 774 | close(child_ready_pipe[0]); |
| 775 | close(go_pipe[1]); |
| 776 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); |
| 777 | |
| 778 | /* |
| 779 | * Do a dummy execvp to get the PLT entry resolved, |
| 780 | * so we avoid the resolver overhead on the real |
| 781 | * execvp call. |
| 782 | */ |
| 783 | execvp("", (char **)argv); |
| 784 | |
| 785 | /* |
| 786 | * Tell the parent we're ready to go |
| 787 | */ |
| 788 | close(child_ready_pipe[1]); |
| 789 | |
| 790 | /* |
| 791 | * Wait until the parent tells us to go. |
| 792 | */ |
| 793 | if (read(go_pipe[0], &bf, 1) == -1) |
| 794 | perror("unable to read pipe"); |
| 795 | |
| 796 | execvp(argv[0], (char **)argv); |
| 797 | |
| 798 | perror(argv[0]); |
| 799 | kill(getppid(), SIGUSR1); |
| 800 | exit(-1); |
| 801 | } |
| 802 | |
| 803 | if (perf_target__none(target)) |
| 804 | evlist->threads->map[0] = evlist->workload.pid; |
| 805 | |
| 806 | close(child_ready_pipe[1]); |
| 807 | close(go_pipe[0]); |
| 808 | /* |
| 809 | * wait for child to settle |
| 810 | */ |
| 811 | if (read(child_ready_pipe[0], &bf, 1) == -1) { |
| 812 | perror("unable to read pipe"); |
| 813 | goto out_close_pipes; |
| 814 | } |
| 815 | |
| 816 | evlist->workload.cork_fd = go_pipe[1]; |
| 817 | close(child_ready_pipe[0]); |
| 818 | return 0; |
| 819 | |
| 820 | out_close_pipes: |
| 821 | close(go_pipe[0]); |
| 822 | close(go_pipe[1]); |
| 823 | out_close_ready_pipe: |
| 824 | close(child_ready_pipe[0]); |
| 825 | close(child_ready_pipe[1]); |
| 826 | return -1; |
| 827 | } |
| 828 | |
| 829 | int perf_evlist__start_workload(struct perf_evlist *evlist) |
| 830 | { |
| 831 | if (evlist->workload.cork_fd > 0) { |
| 832 | /* |
| 833 | * Remove the cork, let it rip! |
| 834 | */ |
| 835 | return close(evlist->workload.cork_fd); |
| 836 | } |
| 837 | |
| 838 | return 0; |
| 839 | } |
| 840 | |
| 841 | int perf_evlist__parse_sample(struct perf_evlist *evlist, union perf_event *event, |
| 842 | struct perf_sample *sample) |
| 843 | { |
| 844 | struct perf_evsel *evsel = perf_evlist__first(evlist); |
| 845 | return perf_evsel__parse_sample(evsel, event, sample); |
| 846 | } |
| 847 | |
| 848 | size_t perf_evlist__fprintf(struct perf_evlist *evlist, FILE *fp) |
| 849 | { |
| 850 | struct perf_evsel *evsel; |
| 851 | size_t printed = 0; |
| 852 | |
| 853 | list_for_each_entry(evsel, &evlist->entries, node) { |
| 854 | printed += fprintf(fp, "%s%s", evsel->idx ? ", " : "", |
| 855 | perf_evsel__name(evsel)); |
| 856 | } |
| 857 | |
| 858 | return printed + fprintf(fp, "\n");; |
| 859 | } |