| 1 | // SPDX-License-Identifier: GPL-2.0 |
| 2 | /* |
| 3 | * builtin-record.c |
| 4 | * |
| 5 | * Builtin record command: Record the profile of a workload |
| 6 | * (or a CPU, or a PID) into the perf.data output file - for |
| 7 | * later analysis via perf report. |
| 8 | */ |
| 9 | #include "builtin.h" |
| 10 | |
| 11 | #include "util/build-id.h" |
| 12 | #include <subcmd/parse-options.h> |
| 13 | #include <internal/xyarray.h> |
| 14 | #include "util/parse-events.h" |
| 15 | #include "util/config.h" |
| 16 | |
| 17 | #include "util/callchain.h" |
| 18 | #include "util/cgroup.h" |
| 19 | #include "util/header.h" |
| 20 | #include "util/event.h" |
| 21 | #include "util/evlist.h" |
| 22 | #include "util/evsel.h" |
| 23 | #include "util/debug.h" |
| 24 | #include "util/mmap.h" |
| 25 | #include "util/mutex.h" |
| 26 | #include "util/target.h" |
| 27 | #include "util/session.h" |
| 28 | #include "util/tool.h" |
| 29 | #include "util/symbol.h" |
| 30 | #include "util/record.h" |
| 31 | #include "util/cpumap.h" |
| 32 | #include "util/thread_map.h" |
| 33 | #include "util/data.h" |
| 34 | #include "util/perf_regs.h" |
| 35 | #include "util/auxtrace.h" |
| 36 | #include "util/tsc.h" |
| 37 | #include "util/parse-branch-options.h" |
| 38 | #include "util/parse-regs-options.h" |
| 39 | #include "util/perf_api_probe.h" |
| 40 | #include "util/trigger.h" |
| 41 | #include "util/perf-hooks.h" |
| 42 | #include "util/cpu-set-sched.h" |
| 43 | #include "util/synthetic-events.h" |
| 44 | #include "util/time-utils.h" |
| 45 | #include "util/units.h" |
| 46 | #include "util/bpf-event.h" |
| 47 | #include "util/util.h" |
| 48 | #include "util/pfm.h" |
| 49 | #include "util/pmu.h" |
| 50 | #include "util/pmus.h" |
| 51 | #include "util/clockid.h" |
| 52 | #include "util/off_cpu.h" |
| 53 | #include "util/bpf-filter.h" |
| 54 | #include "asm/bug.h" |
| 55 | #include "perf.h" |
| 56 | #include "cputopo.h" |
| 57 | |
| 58 | #include <errno.h> |
| 59 | #include <inttypes.h> |
| 60 | #include <locale.h> |
| 61 | #include <poll.h> |
| 62 | #include <pthread.h> |
| 63 | #include <unistd.h> |
| 64 | #ifndef HAVE_GETTID |
| 65 | #include <syscall.h> |
| 66 | #endif |
| 67 | #include <sched.h> |
| 68 | #include <signal.h> |
| 69 | #ifdef HAVE_EVENTFD_SUPPORT |
| 70 | #include <sys/eventfd.h> |
| 71 | #endif |
| 72 | #include <sys/mman.h> |
| 73 | #include <sys/wait.h> |
| 74 | #include <sys/types.h> |
| 75 | #include <sys/stat.h> |
| 76 | #include <fcntl.h> |
| 77 | #include <linux/err.h> |
| 78 | #include <linux/string.h> |
| 79 | #include <linux/time64.h> |
| 80 | #include <linux/zalloc.h> |
| 81 | #include <linux/bitmap.h> |
| 82 | #include <sys/time.h> |
| 83 | |
| 84 | struct switch_output { |
| 85 | bool enabled; |
| 86 | bool signal; |
| 87 | unsigned long size; |
| 88 | unsigned long time; |
| 89 | const char *str; |
| 90 | bool set; |
| 91 | char **filenames; |
| 92 | int num_files; |
| 93 | int cur_file; |
| 94 | }; |
| 95 | |
| 96 | struct thread_mask { |
| 97 | struct mmap_cpu_mask maps; |
| 98 | struct mmap_cpu_mask affinity; |
| 99 | }; |
| 100 | |
| 101 | struct record_thread { |
| 102 | pid_t tid; |
| 103 | struct thread_mask *mask; |
| 104 | struct { |
| 105 | int msg[2]; |
| 106 | int ack[2]; |
| 107 | } pipes; |
| 108 | struct fdarray pollfd; |
| 109 | int ctlfd_pos; |
| 110 | int nr_mmaps; |
| 111 | struct mmap **maps; |
| 112 | struct mmap **overwrite_maps; |
| 113 | struct record *rec; |
| 114 | unsigned long long samples; |
| 115 | unsigned long waking; |
| 116 | u64 bytes_written; |
| 117 | u64 bytes_transferred; |
| 118 | u64 bytes_compressed; |
| 119 | }; |
| 120 | |
| 121 | static __thread struct record_thread *thread; |
| 122 | |
| 123 | enum thread_msg { |
| 124 | THREAD_MSG__UNDEFINED = 0, |
| 125 | THREAD_MSG__READY, |
| 126 | THREAD_MSG__MAX, |
| 127 | }; |
| 128 | |
| 129 | static const char *thread_msg_tags[THREAD_MSG__MAX] = { |
| 130 | "UNDEFINED", "READY" |
| 131 | }; |
| 132 | |
| 133 | enum thread_spec { |
| 134 | THREAD_SPEC__UNDEFINED = 0, |
| 135 | THREAD_SPEC__CPU, |
| 136 | THREAD_SPEC__CORE, |
| 137 | THREAD_SPEC__PACKAGE, |
| 138 | THREAD_SPEC__NUMA, |
| 139 | THREAD_SPEC__USER, |
| 140 | THREAD_SPEC__MAX, |
| 141 | }; |
| 142 | |
| 143 | static const char *thread_spec_tags[THREAD_SPEC__MAX] = { |
| 144 | "undefined", "cpu", "core", "package", "numa", "user" |
| 145 | }; |
| 146 | |
| 147 | struct pollfd_index_map { |
| 148 | int evlist_pollfd_index; |
| 149 | int thread_pollfd_index; |
| 150 | }; |
| 151 | |
| 152 | struct record { |
| 153 | struct perf_tool tool; |
| 154 | struct record_opts opts; |
| 155 | u64 bytes_written; |
| 156 | u64 thread_bytes_written; |
| 157 | struct perf_data data; |
| 158 | struct auxtrace_record *itr; |
| 159 | struct evlist *evlist; |
| 160 | struct perf_session *session; |
| 161 | struct evlist *sb_evlist; |
| 162 | pthread_t thread_id; |
| 163 | int realtime_prio; |
| 164 | bool switch_output_event_set; |
| 165 | bool no_buildid; |
| 166 | bool no_buildid_set; |
| 167 | bool no_buildid_cache; |
| 168 | bool no_buildid_cache_set; |
| 169 | bool buildid_all; |
| 170 | bool buildid_mmap; |
| 171 | bool timestamp_filename; |
| 172 | bool timestamp_boundary; |
| 173 | bool off_cpu; |
| 174 | struct switch_output switch_output; |
| 175 | unsigned long long samples; |
| 176 | unsigned long output_max_size; /* = 0: unlimited */ |
| 177 | struct perf_debuginfod debuginfod; |
| 178 | int nr_threads; |
| 179 | struct thread_mask *thread_masks; |
| 180 | struct record_thread *thread_data; |
| 181 | struct pollfd_index_map *index_map; |
| 182 | size_t index_map_sz; |
| 183 | size_t index_map_cnt; |
| 184 | }; |
| 185 | |
| 186 | static volatile int done; |
| 187 | |
| 188 | static volatile int auxtrace_record__snapshot_started; |
| 189 | static DEFINE_TRIGGER(auxtrace_snapshot_trigger); |
| 190 | static DEFINE_TRIGGER(switch_output_trigger); |
| 191 | |
| 192 | static const char *affinity_tags[PERF_AFFINITY_MAX] = { |
| 193 | "SYS", "NODE", "CPU" |
| 194 | }; |
| 195 | |
| 196 | #ifndef HAVE_GETTID |
| 197 | static inline pid_t gettid(void) |
| 198 | { |
| 199 | return (pid_t)syscall(__NR_gettid); |
| 200 | } |
| 201 | #endif |
| 202 | |
| 203 | static int record__threads_enabled(struct record *rec) |
| 204 | { |
| 205 | return rec->opts.threads_spec; |
| 206 | } |
| 207 | |
| 208 | static bool switch_output_signal(struct record *rec) |
| 209 | { |
| 210 | return rec->switch_output.signal && |
| 211 | trigger_is_ready(&switch_output_trigger); |
| 212 | } |
| 213 | |
| 214 | static bool switch_output_size(struct record *rec) |
| 215 | { |
| 216 | return rec->switch_output.size && |
| 217 | trigger_is_ready(&switch_output_trigger) && |
| 218 | (rec->bytes_written >= rec->switch_output.size); |
| 219 | } |
| 220 | |
| 221 | static bool switch_output_time(struct record *rec) |
| 222 | { |
| 223 | return rec->switch_output.time && |
| 224 | trigger_is_ready(&switch_output_trigger); |
| 225 | } |
| 226 | |
| 227 | static u64 record__bytes_written(struct record *rec) |
| 228 | { |
| 229 | return rec->bytes_written + rec->thread_bytes_written; |
| 230 | } |
| 231 | |
| 232 | static bool record__output_max_size_exceeded(struct record *rec) |
| 233 | { |
| 234 | return rec->output_max_size && |
| 235 | (record__bytes_written(rec) >= rec->output_max_size); |
| 236 | } |
| 237 | |
| 238 | static int record__write(struct record *rec, struct mmap *map __maybe_unused, |
| 239 | void *bf, size_t size) |
| 240 | { |
| 241 | struct perf_data_file *file = &rec->session->data->file; |
| 242 | |
| 243 | if (map && map->file) |
| 244 | file = map->file; |
| 245 | |
| 246 | if (perf_data_file__write(file, bf, size) < 0) { |
| 247 | pr_err("failed to write perf data, error: %m\n"); |
| 248 | return -1; |
| 249 | } |
| 250 | |
| 251 | if (map && map->file) { |
| 252 | thread->bytes_written += size; |
| 253 | rec->thread_bytes_written += size; |
| 254 | } else { |
| 255 | rec->bytes_written += size; |
| 256 | } |
| 257 | |
| 258 | if (record__output_max_size_exceeded(rec) && !done) { |
| 259 | fprintf(stderr, "[ perf record: perf size limit reached (%" PRIu64 " KB)," |
| 260 | " stopping session ]\n", |
| 261 | record__bytes_written(rec) >> 10); |
| 262 | done = 1; |
| 263 | } |
| 264 | |
| 265 | if (switch_output_size(rec)) |
| 266 | trigger_hit(&switch_output_trigger); |
| 267 | |
| 268 | return 0; |
| 269 | } |
| 270 | |
| 271 | static int record__aio_enabled(struct record *rec); |
| 272 | static int record__comp_enabled(struct record *rec); |
| 273 | static ssize_t zstd_compress(struct perf_session *session, struct mmap *map, |
| 274 | void *dst, size_t dst_size, void *src, size_t src_size); |
| 275 | |
| 276 | #ifdef HAVE_AIO_SUPPORT |
| 277 | static int record__aio_write(struct aiocb *cblock, int trace_fd, |
| 278 | void *buf, size_t size, off_t off) |
| 279 | { |
| 280 | int rc; |
| 281 | |
| 282 | cblock->aio_fildes = trace_fd; |
| 283 | cblock->aio_buf = buf; |
| 284 | cblock->aio_nbytes = size; |
| 285 | cblock->aio_offset = off; |
| 286 | cblock->aio_sigevent.sigev_notify = SIGEV_NONE; |
| 287 | |
| 288 | do { |
| 289 | rc = aio_write(cblock); |
| 290 | if (rc == 0) { |
| 291 | break; |
| 292 | } else if (errno != EAGAIN) { |
| 293 | cblock->aio_fildes = -1; |
| 294 | pr_err("failed to queue perf data, error: %m\n"); |
| 295 | break; |
| 296 | } |
| 297 | } while (1); |
| 298 | |
| 299 | return rc; |
| 300 | } |
| 301 | |
| 302 | static int record__aio_complete(struct mmap *md, struct aiocb *cblock) |
| 303 | { |
| 304 | void *rem_buf; |
| 305 | off_t rem_off; |
| 306 | size_t rem_size; |
| 307 | int rc, aio_errno; |
| 308 | ssize_t aio_ret, written; |
| 309 | |
| 310 | aio_errno = aio_error(cblock); |
| 311 | if (aio_errno == EINPROGRESS) |
| 312 | return 0; |
| 313 | |
| 314 | written = aio_ret = aio_return(cblock); |
| 315 | if (aio_ret < 0) { |
| 316 | if (aio_errno != EINTR) |
| 317 | pr_err("failed to write perf data, error: %m\n"); |
| 318 | written = 0; |
| 319 | } |
| 320 | |
| 321 | rem_size = cblock->aio_nbytes - written; |
| 322 | |
| 323 | if (rem_size == 0) { |
| 324 | cblock->aio_fildes = -1; |
| 325 | /* |
| 326 | * md->refcount is incremented in record__aio_pushfn() for |
| 327 | * every aio write request started in record__aio_push() so |
| 328 | * decrement it because the request is now complete. |
| 329 | */ |
| 330 | perf_mmap__put(&md->core); |
| 331 | rc = 1; |
| 332 | } else { |
| 333 | /* |
| 334 | * aio write request may require restart with the |
| 335 | * remainder if the kernel didn't write whole |
| 336 | * chunk at once. |
| 337 | */ |
| 338 | rem_off = cblock->aio_offset + written; |
| 339 | rem_buf = (void *)(cblock->aio_buf + written); |
| 340 | record__aio_write(cblock, cblock->aio_fildes, |
| 341 | rem_buf, rem_size, rem_off); |
| 342 | rc = 0; |
| 343 | } |
| 344 | |
| 345 | return rc; |
| 346 | } |
| 347 | |
| 348 | static int record__aio_sync(struct mmap *md, bool sync_all) |
| 349 | { |
| 350 | struct aiocb **aiocb = md->aio.aiocb; |
| 351 | struct aiocb *cblocks = md->aio.cblocks; |
| 352 | struct timespec timeout = { 0, 1000 * 1000 * 1 }; /* 1ms */ |
| 353 | int i, do_suspend; |
| 354 | |
| 355 | do { |
| 356 | do_suspend = 0; |
| 357 | for (i = 0; i < md->aio.nr_cblocks; ++i) { |
| 358 | if (cblocks[i].aio_fildes == -1 || record__aio_complete(md, &cblocks[i])) { |
| 359 | if (sync_all) |
| 360 | aiocb[i] = NULL; |
| 361 | else |
| 362 | return i; |
| 363 | } else { |
| 364 | /* |
| 365 | * Started aio write is not complete yet |
| 366 | * so it has to be waited before the |
| 367 | * next allocation. |
| 368 | */ |
| 369 | aiocb[i] = &cblocks[i]; |
| 370 | do_suspend = 1; |
| 371 | } |
| 372 | } |
| 373 | if (!do_suspend) |
| 374 | return -1; |
| 375 | |
| 376 | while (aio_suspend((const struct aiocb **)aiocb, md->aio.nr_cblocks, &timeout)) { |
| 377 | if (!(errno == EAGAIN || errno == EINTR)) |
| 378 | pr_err("failed to sync perf data, error: %m\n"); |
| 379 | } |
| 380 | } while (1); |
| 381 | } |
| 382 | |
| 383 | struct record_aio { |
| 384 | struct record *rec; |
| 385 | void *data; |
| 386 | size_t size; |
| 387 | }; |
| 388 | |
| 389 | static int record__aio_pushfn(struct mmap *map, void *to, void *buf, size_t size) |
| 390 | { |
| 391 | struct record_aio *aio = to; |
| 392 | |
| 393 | /* |
| 394 | * map->core.base data pointed by buf is copied into free map->aio.data[] buffer |
| 395 | * to release space in the kernel buffer as fast as possible, calling |
| 396 | * perf_mmap__consume() from perf_mmap__push() function. |
| 397 | * |
| 398 | * That lets the kernel to proceed with storing more profiling data into |
| 399 | * the kernel buffer earlier than other per-cpu kernel buffers are handled. |
| 400 | * |
| 401 | * Coping can be done in two steps in case the chunk of profiling data |
| 402 | * crosses the upper bound of the kernel buffer. In this case we first move |
| 403 | * part of data from map->start till the upper bound and then the remainder |
| 404 | * from the beginning of the kernel buffer till the end of the data chunk. |
| 405 | */ |
| 406 | |
| 407 | if (record__comp_enabled(aio->rec)) { |
| 408 | ssize_t compressed = zstd_compress(aio->rec->session, NULL, aio->data + aio->size, |
| 409 | mmap__mmap_len(map) - aio->size, |
| 410 | buf, size); |
| 411 | if (compressed < 0) |
| 412 | return (int)compressed; |
| 413 | |
| 414 | size = compressed; |
| 415 | } else { |
| 416 | memcpy(aio->data + aio->size, buf, size); |
| 417 | } |
| 418 | |
| 419 | if (!aio->size) { |
| 420 | /* |
| 421 | * Increment map->refcount to guard map->aio.data[] buffer |
| 422 | * from premature deallocation because map object can be |
| 423 | * released earlier than aio write request started on |
| 424 | * map->aio.data[] buffer is complete. |
| 425 | * |
| 426 | * perf_mmap__put() is done at record__aio_complete() |
| 427 | * after started aio request completion or at record__aio_push() |
| 428 | * if the request failed to start. |
| 429 | */ |
| 430 | perf_mmap__get(&map->core); |
| 431 | } |
| 432 | |
| 433 | aio->size += size; |
| 434 | |
| 435 | return size; |
| 436 | } |
| 437 | |
| 438 | static int record__aio_push(struct record *rec, struct mmap *map, off_t *off) |
| 439 | { |
| 440 | int ret, idx; |
| 441 | int trace_fd = rec->session->data->file.fd; |
| 442 | struct record_aio aio = { .rec = rec, .size = 0 }; |
| 443 | |
| 444 | /* |
| 445 | * Call record__aio_sync() to wait till map->aio.data[] buffer |
| 446 | * becomes available after previous aio write operation. |
| 447 | */ |
| 448 | |
| 449 | idx = record__aio_sync(map, false); |
| 450 | aio.data = map->aio.data[idx]; |
| 451 | ret = perf_mmap__push(map, &aio, record__aio_pushfn); |
| 452 | if (ret != 0) /* ret > 0 - no data, ret < 0 - error */ |
| 453 | return ret; |
| 454 | |
| 455 | rec->samples++; |
| 456 | ret = record__aio_write(&(map->aio.cblocks[idx]), trace_fd, aio.data, aio.size, *off); |
| 457 | if (!ret) { |
| 458 | *off += aio.size; |
| 459 | rec->bytes_written += aio.size; |
| 460 | if (switch_output_size(rec)) |
| 461 | trigger_hit(&switch_output_trigger); |
| 462 | } else { |
| 463 | /* |
| 464 | * Decrement map->refcount incremented in record__aio_pushfn() |
| 465 | * back if record__aio_write() operation failed to start, otherwise |
| 466 | * map->refcount is decremented in record__aio_complete() after |
| 467 | * aio write operation finishes successfully. |
| 468 | */ |
| 469 | perf_mmap__put(&map->core); |
| 470 | } |
| 471 | |
| 472 | return ret; |
| 473 | } |
| 474 | |
| 475 | static off_t record__aio_get_pos(int trace_fd) |
| 476 | { |
| 477 | return lseek(trace_fd, 0, SEEK_CUR); |
| 478 | } |
| 479 | |
| 480 | static void record__aio_set_pos(int trace_fd, off_t pos) |
| 481 | { |
| 482 | lseek(trace_fd, pos, SEEK_SET); |
| 483 | } |
| 484 | |
| 485 | static void record__aio_mmap_read_sync(struct record *rec) |
| 486 | { |
| 487 | int i; |
| 488 | struct evlist *evlist = rec->evlist; |
| 489 | struct mmap *maps = evlist->mmap; |
| 490 | |
| 491 | if (!record__aio_enabled(rec)) |
| 492 | return; |
| 493 | |
| 494 | for (i = 0; i < evlist->core.nr_mmaps; i++) { |
| 495 | struct mmap *map = &maps[i]; |
| 496 | |
| 497 | if (map->core.base) |
| 498 | record__aio_sync(map, true); |
| 499 | } |
| 500 | } |
| 501 | |
| 502 | static int nr_cblocks_default = 1; |
| 503 | static int nr_cblocks_max = 4; |
| 504 | |
| 505 | static int record__aio_parse(const struct option *opt, |
| 506 | const char *str, |
| 507 | int unset) |
| 508 | { |
| 509 | struct record_opts *opts = (struct record_opts *)opt->value; |
| 510 | |
| 511 | if (unset) { |
| 512 | opts->nr_cblocks = 0; |
| 513 | } else { |
| 514 | if (str) |
| 515 | opts->nr_cblocks = strtol(str, NULL, 0); |
| 516 | if (!opts->nr_cblocks) |
| 517 | opts->nr_cblocks = nr_cblocks_default; |
| 518 | } |
| 519 | |
| 520 | return 0; |
| 521 | } |
| 522 | #else /* HAVE_AIO_SUPPORT */ |
| 523 | static int nr_cblocks_max = 0; |
| 524 | |
| 525 | static int record__aio_push(struct record *rec __maybe_unused, struct mmap *map __maybe_unused, |
| 526 | off_t *off __maybe_unused) |
| 527 | { |
| 528 | return -1; |
| 529 | } |
| 530 | |
| 531 | static off_t record__aio_get_pos(int trace_fd __maybe_unused) |
| 532 | { |
| 533 | return -1; |
| 534 | } |
| 535 | |
| 536 | static void record__aio_set_pos(int trace_fd __maybe_unused, off_t pos __maybe_unused) |
| 537 | { |
| 538 | } |
| 539 | |
| 540 | static void record__aio_mmap_read_sync(struct record *rec __maybe_unused) |
| 541 | { |
| 542 | } |
| 543 | #endif |
| 544 | |
| 545 | static int record__aio_enabled(struct record *rec) |
| 546 | { |
| 547 | return rec->opts.nr_cblocks > 0; |
| 548 | } |
| 549 | |
| 550 | #define MMAP_FLUSH_DEFAULT 1 |
| 551 | static int record__mmap_flush_parse(const struct option *opt, |
| 552 | const char *str, |
| 553 | int unset) |
| 554 | { |
| 555 | int flush_max; |
| 556 | struct record_opts *opts = (struct record_opts *)opt->value; |
| 557 | static struct parse_tag tags[] = { |
| 558 | { .tag = 'B', .mult = 1 }, |
| 559 | { .tag = 'K', .mult = 1 << 10 }, |
| 560 | { .tag = 'M', .mult = 1 << 20 }, |
| 561 | { .tag = 'G', .mult = 1 << 30 }, |
| 562 | { .tag = 0 }, |
| 563 | }; |
| 564 | |
| 565 | if (unset) |
| 566 | return 0; |
| 567 | |
| 568 | if (str) { |
| 569 | opts->mmap_flush = parse_tag_value(str, tags); |
| 570 | if (opts->mmap_flush == (int)-1) |
| 571 | opts->mmap_flush = strtol(str, NULL, 0); |
| 572 | } |
| 573 | |
| 574 | if (!opts->mmap_flush) |
| 575 | opts->mmap_flush = MMAP_FLUSH_DEFAULT; |
| 576 | |
| 577 | flush_max = evlist__mmap_size(opts->mmap_pages); |
| 578 | flush_max /= 4; |
| 579 | if (opts->mmap_flush > flush_max) |
| 580 | opts->mmap_flush = flush_max; |
| 581 | |
| 582 | return 0; |
| 583 | } |
| 584 | |
| 585 | #ifdef HAVE_ZSTD_SUPPORT |
| 586 | static unsigned int comp_level_default = 1; |
| 587 | |
| 588 | static int record__parse_comp_level(const struct option *opt, const char *str, int unset) |
| 589 | { |
| 590 | struct record_opts *opts = opt->value; |
| 591 | |
| 592 | if (unset) { |
| 593 | opts->comp_level = 0; |
| 594 | } else { |
| 595 | if (str) |
| 596 | opts->comp_level = strtol(str, NULL, 0); |
| 597 | if (!opts->comp_level) |
| 598 | opts->comp_level = comp_level_default; |
| 599 | } |
| 600 | |
| 601 | return 0; |
| 602 | } |
| 603 | #endif |
| 604 | static unsigned int comp_level_max = 22; |
| 605 | |
| 606 | static int record__comp_enabled(struct record *rec) |
| 607 | { |
| 608 | return rec->opts.comp_level > 0; |
| 609 | } |
| 610 | |
| 611 | static int process_synthesized_event(struct perf_tool *tool, |
| 612 | union perf_event *event, |
| 613 | struct perf_sample *sample __maybe_unused, |
| 614 | struct machine *machine __maybe_unused) |
| 615 | { |
| 616 | struct record *rec = container_of(tool, struct record, tool); |
| 617 | return record__write(rec, NULL, event, event->header.size); |
| 618 | } |
| 619 | |
| 620 | static struct mutex synth_lock; |
| 621 | |
| 622 | static int process_locked_synthesized_event(struct perf_tool *tool, |
| 623 | union perf_event *event, |
| 624 | struct perf_sample *sample __maybe_unused, |
| 625 | struct machine *machine __maybe_unused) |
| 626 | { |
| 627 | int ret; |
| 628 | |
| 629 | mutex_lock(&synth_lock); |
| 630 | ret = process_synthesized_event(tool, event, sample, machine); |
| 631 | mutex_unlock(&synth_lock); |
| 632 | return ret; |
| 633 | } |
| 634 | |
| 635 | static int record__pushfn(struct mmap *map, void *to, void *bf, size_t size) |
| 636 | { |
| 637 | struct record *rec = to; |
| 638 | |
| 639 | if (record__comp_enabled(rec)) { |
| 640 | ssize_t compressed = zstd_compress(rec->session, map, map->data, |
| 641 | mmap__mmap_len(map), bf, size); |
| 642 | |
| 643 | if (compressed < 0) |
| 644 | return (int)compressed; |
| 645 | |
| 646 | size = compressed; |
| 647 | bf = map->data; |
| 648 | } |
| 649 | |
| 650 | thread->samples++; |
| 651 | return record__write(rec, map, bf, size); |
| 652 | } |
| 653 | |
| 654 | static volatile sig_atomic_t signr = -1; |
| 655 | static volatile sig_atomic_t child_finished; |
| 656 | #ifdef HAVE_EVENTFD_SUPPORT |
| 657 | static volatile sig_atomic_t done_fd = -1; |
| 658 | #endif |
| 659 | |
| 660 | static void sig_handler(int sig) |
| 661 | { |
| 662 | if (sig == SIGCHLD) |
| 663 | child_finished = 1; |
| 664 | else |
| 665 | signr = sig; |
| 666 | |
| 667 | done = 1; |
| 668 | #ifdef HAVE_EVENTFD_SUPPORT |
| 669 | if (done_fd >= 0) { |
| 670 | u64 tmp = 1; |
| 671 | int orig_errno = errno; |
| 672 | |
| 673 | /* |
| 674 | * It is possible for this signal handler to run after done is |
| 675 | * checked in the main loop, but before the perf counter fds are |
| 676 | * polled. If this happens, the poll() will continue to wait |
| 677 | * even though done is set, and will only break out if either |
| 678 | * another signal is received, or the counters are ready for |
| 679 | * read. To ensure the poll() doesn't sleep when done is set, |
| 680 | * use an eventfd (done_fd) to wake up the poll(). |
| 681 | */ |
| 682 | if (write(done_fd, &tmp, sizeof(tmp)) < 0) |
| 683 | pr_err("failed to signal wakeup fd, error: %m\n"); |
| 684 | |
| 685 | errno = orig_errno; |
| 686 | } |
| 687 | #endif // HAVE_EVENTFD_SUPPORT |
| 688 | } |
| 689 | |
| 690 | static void sigsegv_handler(int sig) |
| 691 | { |
| 692 | perf_hooks__recover(); |
| 693 | sighandler_dump_stack(sig); |
| 694 | } |
| 695 | |
| 696 | static void record__sig_exit(void) |
| 697 | { |
| 698 | if (signr == -1) |
| 699 | return; |
| 700 | |
| 701 | signal(signr, SIG_DFL); |
| 702 | raise(signr); |
| 703 | } |
| 704 | |
| 705 | #ifdef HAVE_AUXTRACE_SUPPORT |
| 706 | |
| 707 | static int record__process_auxtrace(struct perf_tool *tool, |
| 708 | struct mmap *map, |
| 709 | union perf_event *event, void *data1, |
| 710 | size_t len1, void *data2, size_t len2) |
| 711 | { |
| 712 | struct record *rec = container_of(tool, struct record, tool); |
| 713 | struct perf_data *data = &rec->data; |
| 714 | size_t padding; |
| 715 | u8 pad[8] = {0}; |
| 716 | |
| 717 | if (!perf_data__is_pipe(data) && perf_data__is_single_file(data)) { |
| 718 | off_t file_offset; |
| 719 | int fd = perf_data__fd(data); |
| 720 | int err; |
| 721 | |
| 722 | file_offset = lseek(fd, 0, SEEK_CUR); |
| 723 | if (file_offset == -1) |
| 724 | return -1; |
| 725 | err = auxtrace_index__auxtrace_event(&rec->session->auxtrace_index, |
| 726 | event, file_offset); |
| 727 | if (err) |
| 728 | return err; |
| 729 | } |
| 730 | |
| 731 | /* event.auxtrace.size includes padding, see __auxtrace_mmap__read() */ |
| 732 | padding = (len1 + len2) & 7; |
| 733 | if (padding) |
| 734 | padding = 8 - padding; |
| 735 | |
| 736 | record__write(rec, map, event, event->header.size); |
| 737 | record__write(rec, map, data1, len1); |
| 738 | if (len2) |
| 739 | record__write(rec, map, data2, len2); |
| 740 | record__write(rec, map, &pad, padding); |
| 741 | |
| 742 | return 0; |
| 743 | } |
| 744 | |
| 745 | static int record__auxtrace_mmap_read(struct record *rec, |
| 746 | struct mmap *map) |
| 747 | { |
| 748 | int ret; |
| 749 | |
| 750 | ret = auxtrace_mmap__read(map, rec->itr, &rec->tool, |
| 751 | record__process_auxtrace); |
| 752 | if (ret < 0) |
| 753 | return ret; |
| 754 | |
| 755 | if (ret) |
| 756 | rec->samples++; |
| 757 | |
| 758 | return 0; |
| 759 | } |
| 760 | |
| 761 | static int record__auxtrace_mmap_read_snapshot(struct record *rec, |
| 762 | struct mmap *map) |
| 763 | { |
| 764 | int ret; |
| 765 | |
| 766 | ret = auxtrace_mmap__read_snapshot(map, rec->itr, &rec->tool, |
| 767 | record__process_auxtrace, |
| 768 | rec->opts.auxtrace_snapshot_size); |
| 769 | if (ret < 0) |
| 770 | return ret; |
| 771 | |
| 772 | if (ret) |
| 773 | rec->samples++; |
| 774 | |
| 775 | return 0; |
| 776 | } |
| 777 | |
| 778 | static int record__auxtrace_read_snapshot_all(struct record *rec) |
| 779 | { |
| 780 | int i; |
| 781 | int rc = 0; |
| 782 | |
| 783 | for (i = 0; i < rec->evlist->core.nr_mmaps; i++) { |
| 784 | struct mmap *map = &rec->evlist->mmap[i]; |
| 785 | |
| 786 | if (!map->auxtrace_mmap.base) |
| 787 | continue; |
| 788 | |
| 789 | if (record__auxtrace_mmap_read_snapshot(rec, map) != 0) { |
| 790 | rc = -1; |
| 791 | goto out; |
| 792 | } |
| 793 | } |
| 794 | out: |
| 795 | return rc; |
| 796 | } |
| 797 | |
| 798 | static void record__read_auxtrace_snapshot(struct record *rec, bool on_exit) |
| 799 | { |
| 800 | pr_debug("Recording AUX area tracing snapshot\n"); |
| 801 | if (record__auxtrace_read_snapshot_all(rec) < 0) { |
| 802 | trigger_error(&auxtrace_snapshot_trigger); |
| 803 | } else { |
| 804 | if (auxtrace_record__snapshot_finish(rec->itr, on_exit)) |
| 805 | trigger_error(&auxtrace_snapshot_trigger); |
| 806 | else |
| 807 | trigger_ready(&auxtrace_snapshot_trigger); |
| 808 | } |
| 809 | } |
| 810 | |
| 811 | static int record__auxtrace_snapshot_exit(struct record *rec) |
| 812 | { |
| 813 | if (trigger_is_error(&auxtrace_snapshot_trigger)) |
| 814 | return 0; |
| 815 | |
| 816 | if (!auxtrace_record__snapshot_started && |
| 817 | auxtrace_record__snapshot_start(rec->itr)) |
| 818 | return -1; |
| 819 | |
| 820 | record__read_auxtrace_snapshot(rec, true); |
| 821 | if (trigger_is_error(&auxtrace_snapshot_trigger)) |
| 822 | return -1; |
| 823 | |
| 824 | return 0; |
| 825 | } |
| 826 | |
| 827 | static int record__auxtrace_init(struct record *rec) |
| 828 | { |
| 829 | int err; |
| 830 | |
| 831 | if ((rec->opts.auxtrace_snapshot_opts || rec->opts.auxtrace_sample_opts) |
| 832 | && record__threads_enabled(rec)) { |
| 833 | pr_err("AUX area tracing options are not available in parallel streaming mode.\n"); |
| 834 | return -EINVAL; |
| 835 | } |
| 836 | |
| 837 | if (!rec->itr) { |
| 838 | rec->itr = auxtrace_record__init(rec->evlist, &err); |
| 839 | if (err) |
| 840 | return err; |
| 841 | } |
| 842 | |
| 843 | err = auxtrace_parse_snapshot_options(rec->itr, &rec->opts, |
| 844 | rec->opts.auxtrace_snapshot_opts); |
| 845 | if (err) |
| 846 | return err; |
| 847 | |
| 848 | err = auxtrace_parse_sample_options(rec->itr, rec->evlist, &rec->opts, |
| 849 | rec->opts.auxtrace_sample_opts); |
| 850 | if (err) |
| 851 | return err; |
| 852 | |
| 853 | auxtrace_regroup_aux_output(rec->evlist); |
| 854 | |
| 855 | return auxtrace_parse_filters(rec->evlist); |
| 856 | } |
| 857 | |
| 858 | #else |
| 859 | |
| 860 | static inline |
| 861 | int record__auxtrace_mmap_read(struct record *rec __maybe_unused, |
| 862 | struct mmap *map __maybe_unused) |
| 863 | { |
| 864 | return 0; |
| 865 | } |
| 866 | |
| 867 | static inline |
| 868 | void record__read_auxtrace_snapshot(struct record *rec __maybe_unused, |
| 869 | bool on_exit __maybe_unused) |
| 870 | { |
| 871 | } |
| 872 | |
| 873 | static inline |
| 874 | int auxtrace_record__snapshot_start(struct auxtrace_record *itr __maybe_unused) |
| 875 | { |
| 876 | return 0; |
| 877 | } |
| 878 | |
| 879 | static inline |
| 880 | int record__auxtrace_snapshot_exit(struct record *rec __maybe_unused) |
| 881 | { |
| 882 | return 0; |
| 883 | } |
| 884 | |
| 885 | static int record__auxtrace_init(struct record *rec __maybe_unused) |
| 886 | { |
| 887 | return 0; |
| 888 | } |
| 889 | |
| 890 | #endif |
| 891 | |
| 892 | static int record__config_text_poke(struct evlist *evlist) |
| 893 | { |
| 894 | struct evsel *evsel; |
| 895 | |
| 896 | /* Nothing to do if text poke is already configured */ |
| 897 | evlist__for_each_entry(evlist, evsel) { |
| 898 | if (evsel->core.attr.text_poke) |
| 899 | return 0; |
| 900 | } |
| 901 | |
| 902 | evsel = evlist__add_dummy_on_all_cpus(evlist); |
| 903 | if (!evsel) |
| 904 | return -ENOMEM; |
| 905 | |
| 906 | evsel->core.attr.text_poke = 1; |
| 907 | evsel->core.attr.ksymbol = 1; |
| 908 | evsel->immediate = true; |
| 909 | evsel__set_sample_bit(evsel, TIME); |
| 910 | |
| 911 | return 0; |
| 912 | } |
| 913 | |
| 914 | static int record__config_off_cpu(struct record *rec) |
| 915 | { |
| 916 | return off_cpu_prepare(rec->evlist, &rec->opts.target, &rec->opts); |
| 917 | } |
| 918 | |
| 919 | static bool record__tracking_system_wide(struct record *rec) |
| 920 | { |
| 921 | struct evlist *evlist = rec->evlist; |
| 922 | struct evsel *evsel; |
| 923 | |
| 924 | /* |
| 925 | * If non-dummy evsel exists, system_wide sideband is need to |
| 926 | * help parse sample information. |
| 927 | * For example, PERF_EVENT_MMAP event to help parse symbol, |
| 928 | * and PERF_EVENT_COMM event to help parse task executable name. |
| 929 | */ |
| 930 | evlist__for_each_entry(evlist, evsel) { |
| 931 | if (!evsel__is_dummy_event(evsel)) |
| 932 | return true; |
| 933 | } |
| 934 | |
| 935 | return false; |
| 936 | } |
| 937 | |
| 938 | static int record__config_tracking_events(struct record *rec) |
| 939 | { |
| 940 | struct record_opts *opts = &rec->opts; |
| 941 | struct evlist *evlist = rec->evlist; |
| 942 | bool system_wide = false; |
| 943 | struct evsel *evsel; |
| 944 | |
| 945 | /* |
| 946 | * For initial_delay, system wide or a hybrid system, we need to add |
| 947 | * tracking event so that we can track PERF_RECORD_MMAP to cover the |
| 948 | * delay of waiting or event synthesis. |
| 949 | */ |
| 950 | if (opts->target.initial_delay || target__has_cpu(&opts->target) || |
| 951 | perf_pmus__num_core_pmus() > 1) { |
| 952 | |
| 953 | /* |
| 954 | * User space tasks can migrate between CPUs, so when tracing |
| 955 | * selected CPUs, sideband for all CPUs is still needed. |
| 956 | */ |
| 957 | if (!!opts->target.cpu_list && record__tracking_system_wide(rec)) |
| 958 | system_wide = true; |
| 959 | |
| 960 | evsel = evlist__findnew_tracking_event(evlist, system_wide); |
| 961 | if (!evsel) |
| 962 | return -ENOMEM; |
| 963 | |
| 964 | /* |
| 965 | * Enable the tracking event when the process is forked for |
| 966 | * initial_delay, immediately for system wide. |
| 967 | */ |
| 968 | if (opts->target.initial_delay && !evsel->immediate && |
| 969 | !target__has_cpu(&opts->target)) |
| 970 | evsel->core.attr.enable_on_exec = 1; |
| 971 | else |
| 972 | evsel->immediate = 1; |
| 973 | } |
| 974 | |
| 975 | return 0; |
| 976 | } |
| 977 | |
| 978 | static bool record__kcore_readable(struct machine *machine) |
| 979 | { |
| 980 | char kcore[PATH_MAX]; |
| 981 | int fd; |
| 982 | |
| 983 | scnprintf(kcore, sizeof(kcore), "%s/proc/kcore", machine->root_dir); |
| 984 | |
| 985 | fd = open(kcore, O_RDONLY); |
| 986 | if (fd < 0) |
| 987 | return false; |
| 988 | |
| 989 | close(fd); |
| 990 | |
| 991 | return true; |
| 992 | } |
| 993 | |
| 994 | static int record__kcore_copy(struct machine *machine, struct perf_data *data) |
| 995 | { |
| 996 | char from_dir[PATH_MAX]; |
| 997 | char kcore_dir[PATH_MAX]; |
| 998 | int ret; |
| 999 | |
| 1000 | snprintf(from_dir, sizeof(from_dir), "%s/proc", machine->root_dir); |
| 1001 | |
| 1002 | ret = perf_data__make_kcore_dir(data, kcore_dir, sizeof(kcore_dir)); |
| 1003 | if (ret) |
| 1004 | return ret; |
| 1005 | |
| 1006 | return kcore_copy(from_dir, kcore_dir); |
| 1007 | } |
| 1008 | |
| 1009 | static void record__thread_data_init_pipes(struct record_thread *thread_data) |
| 1010 | { |
| 1011 | thread_data->pipes.msg[0] = -1; |
| 1012 | thread_data->pipes.msg[1] = -1; |
| 1013 | thread_data->pipes.ack[0] = -1; |
| 1014 | thread_data->pipes.ack[1] = -1; |
| 1015 | } |
| 1016 | |
| 1017 | static int record__thread_data_open_pipes(struct record_thread *thread_data) |
| 1018 | { |
| 1019 | if (pipe(thread_data->pipes.msg)) |
| 1020 | return -EINVAL; |
| 1021 | |
| 1022 | if (pipe(thread_data->pipes.ack)) { |
| 1023 | close(thread_data->pipes.msg[0]); |
| 1024 | thread_data->pipes.msg[0] = -1; |
| 1025 | close(thread_data->pipes.msg[1]); |
| 1026 | thread_data->pipes.msg[1] = -1; |
| 1027 | return -EINVAL; |
| 1028 | } |
| 1029 | |
| 1030 | pr_debug2("thread_data[%p]: msg=[%d,%d], ack=[%d,%d]\n", thread_data, |
| 1031 | thread_data->pipes.msg[0], thread_data->pipes.msg[1], |
| 1032 | thread_data->pipes.ack[0], thread_data->pipes.ack[1]); |
| 1033 | |
| 1034 | return 0; |
| 1035 | } |
| 1036 | |
| 1037 | static void record__thread_data_close_pipes(struct record_thread *thread_data) |
| 1038 | { |
| 1039 | if (thread_data->pipes.msg[0] != -1) { |
| 1040 | close(thread_data->pipes.msg[0]); |
| 1041 | thread_data->pipes.msg[0] = -1; |
| 1042 | } |
| 1043 | if (thread_data->pipes.msg[1] != -1) { |
| 1044 | close(thread_data->pipes.msg[1]); |
| 1045 | thread_data->pipes.msg[1] = -1; |
| 1046 | } |
| 1047 | if (thread_data->pipes.ack[0] != -1) { |
| 1048 | close(thread_data->pipes.ack[0]); |
| 1049 | thread_data->pipes.ack[0] = -1; |
| 1050 | } |
| 1051 | if (thread_data->pipes.ack[1] != -1) { |
| 1052 | close(thread_data->pipes.ack[1]); |
| 1053 | thread_data->pipes.ack[1] = -1; |
| 1054 | } |
| 1055 | } |
| 1056 | |
| 1057 | static bool evlist__per_thread(struct evlist *evlist) |
| 1058 | { |
| 1059 | return cpu_map__is_dummy(evlist->core.user_requested_cpus); |
| 1060 | } |
| 1061 | |
| 1062 | static int record__thread_data_init_maps(struct record_thread *thread_data, struct evlist *evlist) |
| 1063 | { |
| 1064 | int m, tm, nr_mmaps = evlist->core.nr_mmaps; |
| 1065 | struct mmap *mmap = evlist->mmap; |
| 1066 | struct mmap *overwrite_mmap = evlist->overwrite_mmap; |
| 1067 | struct perf_cpu_map *cpus = evlist->core.all_cpus; |
| 1068 | bool per_thread = evlist__per_thread(evlist); |
| 1069 | |
| 1070 | if (per_thread) |
| 1071 | thread_data->nr_mmaps = nr_mmaps; |
| 1072 | else |
| 1073 | thread_data->nr_mmaps = bitmap_weight(thread_data->mask->maps.bits, |
| 1074 | thread_data->mask->maps.nbits); |
| 1075 | if (mmap) { |
| 1076 | thread_data->maps = zalloc(thread_data->nr_mmaps * sizeof(struct mmap *)); |
| 1077 | if (!thread_data->maps) |
| 1078 | return -ENOMEM; |
| 1079 | } |
| 1080 | if (overwrite_mmap) { |
| 1081 | thread_data->overwrite_maps = zalloc(thread_data->nr_mmaps * sizeof(struct mmap *)); |
| 1082 | if (!thread_data->overwrite_maps) { |
| 1083 | zfree(&thread_data->maps); |
| 1084 | return -ENOMEM; |
| 1085 | } |
| 1086 | } |
| 1087 | pr_debug2("thread_data[%p]: nr_mmaps=%d, maps=%p, ow_maps=%p\n", thread_data, |
| 1088 | thread_data->nr_mmaps, thread_data->maps, thread_data->overwrite_maps); |
| 1089 | |
| 1090 | for (m = 0, tm = 0; m < nr_mmaps && tm < thread_data->nr_mmaps; m++) { |
| 1091 | if (per_thread || |
| 1092 | test_bit(perf_cpu_map__cpu(cpus, m).cpu, thread_data->mask->maps.bits)) { |
| 1093 | if (thread_data->maps) { |
| 1094 | thread_data->maps[tm] = &mmap[m]; |
| 1095 | pr_debug2("thread_data[%p]: cpu%d: maps[%d] -> mmap[%d]\n", |
| 1096 | thread_data, perf_cpu_map__cpu(cpus, m).cpu, tm, m); |
| 1097 | } |
| 1098 | if (thread_data->overwrite_maps) { |
| 1099 | thread_data->overwrite_maps[tm] = &overwrite_mmap[m]; |
| 1100 | pr_debug2("thread_data[%p]: cpu%d: ow_maps[%d] -> ow_mmap[%d]\n", |
| 1101 | thread_data, perf_cpu_map__cpu(cpus, m).cpu, tm, m); |
| 1102 | } |
| 1103 | tm++; |
| 1104 | } |
| 1105 | } |
| 1106 | |
| 1107 | return 0; |
| 1108 | } |
| 1109 | |
| 1110 | static int record__thread_data_init_pollfd(struct record_thread *thread_data, struct evlist *evlist) |
| 1111 | { |
| 1112 | int f, tm, pos; |
| 1113 | struct mmap *map, *overwrite_map; |
| 1114 | |
| 1115 | fdarray__init(&thread_data->pollfd, 64); |
| 1116 | |
| 1117 | for (tm = 0; tm < thread_data->nr_mmaps; tm++) { |
| 1118 | map = thread_data->maps ? thread_data->maps[tm] : NULL; |
| 1119 | overwrite_map = thread_data->overwrite_maps ? |
| 1120 | thread_data->overwrite_maps[tm] : NULL; |
| 1121 | |
| 1122 | for (f = 0; f < evlist->core.pollfd.nr; f++) { |
| 1123 | void *ptr = evlist->core.pollfd.priv[f].ptr; |
| 1124 | |
| 1125 | if ((map && ptr == map) || (overwrite_map && ptr == overwrite_map)) { |
| 1126 | pos = fdarray__dup_entry_from(&thread_data->pollfd, f, |
| 1127 | &evlist->core.pollfd); |
| 1128 | if (pos < 0) |
| 1129 | return pos; |
| 1130 | pr_debug2("thread_data[%p]: pollfd[%d] <- event_fd=%d\n", |
| 1131 | thread_data, pos, evlist->core.pollfd.entries[f].fd); |
| 1132 | } |
| 1133 | } |
| 1134 | } |
| 1135 | |
| 1136 | return 0; |
| 1137 | } |
| 1138 | |
| 1139 | static void record__free_thread_data(struct record *rec) |
| 1140 | { |
| 1141 | int t; |
| 1142 | struct record_thread *thread_data = rec->thread_data; |
| 1143 | |
| 1144 | if (thread_data == NULL) |
| 1145 | return; |
| 1146 | |
| 1147 | for (t = 0; t < rec->nr_threads; t++) { |
| 1148 | record__thread_data_close_pipes(&thread_data[t]); |
| 1149 | zfree(&thread_data[t].maps); |
| 1150 | zfree(&thread_data[t].overwrite_maps); |
| 1151 | fdarray__exit(&thread_data[t].pollfd); |
| 1152 | } |
| 1153 | |
| 1154 | zfree(&rec->thread_data); |
| 1155 | } |
| 1156 | |
| 1157 | static int record__map_thread_evlist_pollfd_indexes(struct record *rec, |
| 1158 | int evlist_pollfd_index, |
| 1159 | int thread_pollfd_index) |
| 1160 | { |
| 1161 | size_t x = rec->index_map_cnt; |
| 1162 | |
| 1163 | if (realloc_array_as_needed(rec->index_map, rec->index_map_sz, x, NULL)) |
| 1164 | return -ENOMEM; |
| 1165 | rec->index_map[x].evlist_pollfd_index = evlist_pollfd_index; |
| 1166 | rec->index_map[x].thread_pollfd_index = thread_pollfd_index; |
| 1167 | rec->index_map_cnt += 1; |
| 1168 | return 0; |
| 1169 | } |
| 1170 | |
| 1171 | static int record__update_evlist_pollfd_from_thread(struct record *rec, |
| 1172 | struct evlist *evlist, |
| 1173 | struct record_thread *thread_data) |
| 1174 | { |
| 1175 | struct pollfd *e_entries = evlist->core.pollfd.entries; |
| 1176 | struct pollfd *t_entries = thread_data->pollfd.entries; |
| 1177 | int err = 0; |
| 1178 | size_t i; |
| 1179 | |
| 1180 | for (i = 0; i < rec->index_map_cnt; i++) { |
| 1181 | int e_pos = rec->index_map[i].evlist_pollfd_index; |
| 1182 | int t_pos = rec->index_map[i].thread_pollfd_index; |
| 1183 | |
| 1184 | if (e_entries[e_pos].fd != t_entries[t_pos].fd || |
| 1185 | e_entries[e_pos].events != t_entries[t_pos].events) { |
| 1186 | pr_err("Thread and evlist pollfd index mismatch\n"); |
| 1187 | err = -EINVAL; |
| 1188 | continue; |
| 1189 | } |
| 1190 | e_entries[e_pos].revents = t_entries[t_pos].revents; |
| 1191 | } |
| 1192 | return err; |
| 1193 | } |
| 1194 | |
| 1195 | static int record__dup_non_perf_events(struct record *rec, |
| 1196 | struct evlist *evlist, |
| 1197 | struct record_thread *thread_data) |
| 1198 | { |
| 1199 | struct fdarray *fda = &evlist->core.pollfd; |
| 1200 | int i, ret; |
| 1201 | |
| 1202 | for (i = 0; i < fda->nr; i++) { |
| 1203 | if (!(fda->priv[i].flags & fdarray_flag__non_perf_event)) |
| 1204 | continue; |
| 1205 | ret = fdarray__dup_entry_from(&thread_data->pollfd, i, fda); |
| 1206 | if (ret < 0) { |
| 1207 | pr_err("Failed to duplicate descriptor in main thread pollfd\n"); |
| 1208 | return ret; |
| 1209 | } |
| 1210 | pr_debug2("thread_data[%p]: pollfd[%d] <- non_perf_event fd=%d\n", |
| 1211 | thread_data, ret, fda->entries[i].fd); |
| 1212 | ret = record__map_thread_evlist_pollfd_indexes(rec, i, ret); |
| 1213 | if (ret < 0) { |
| 1214 | pr_err("Failed to map thread and evlist pollfd indexes\n"); |
| 1215 | return ret; |
| 1216 | } |
| 1217 | } |
| 1218 | return 0; |
| 1219 | } |
| 1220 | |
| 1221 | static int record__alloc_thread_data(struct record *rec, struct evlist *evlist) |
| 1222 | { |
| 1223 | int t, ret; |
| 1224 | struct record_thread *thread_data; |
| 1225 | |
| 1226 | rec->thread_data = zalloc(rec->nr_threads * sizeof(*(rec->thread_data))); |
| 1227 | if (!rec->thread_data) { |
| 1228 | pr_err("Failed to allocate thread data\n"); |
| 1229 | return -ENOMEM; |
| 1230 | } |
| 1231 | thread_data = rec->thread_data; |
| 1232 | |
| 1233 | for (t = 0; t < rec->nr_threads; t++) |
| 1234 | record__thread_data_init_pipes(&thread_data[t]); |
| 1235 | |
| 1236 | for (t = 0; t < rec->nr_threads; t++) { |
| 1237 | thread_data[t].rec = rec; |
| 1238 | thread_data[t].mask = &rec->thread_masks[t]; |
| 1239 | ret = record__thread_data_init_maps(&thread_data[t], evlist); |
| 1240 | if (ret) { |
| 1241 | pr_err("Failed to initialize thread[%d] maps\n", t); |
| 1242 | goto out_free; |
| 1243 | } |
| 1244 | ret = record__thread_data_init_pollfd(&thread_data[t], evlist); |
| 1245 | if (ret) { |
| 1246 | pr_err("Failed to initialize thread[%d] pollfd\n", t); |
| 1247 | goto out_free; |
| 1248 | } |
| 1249 | if (t) { |
| 1250 | thread_data[t].tid = -1; |
| 1251 | ret = record__thread_data_open_pipes(&thread_data[t]); |
| 1252 | if (ret) { |
| 1253 | pr_err("Failed to open thread[%d] communication pipes\n", t); |
| 1254 | goto out_free; |
| 1255 | } |
| 1256 | ret = fdarray__add(&thread_data[t].pollfd, thread_data[t].pipes.msg[0], |
| 1257 | POLLIN | POLLERR | POLLHUP, fdarray_flag__nonfilterable); |
| 1258 | if (ret < 0) { |
| 1259 | pr_err("Failed to add descriptor to thread[%d] pollfd\n", t); |
| 1260 | goto out_free; |
| 1261 | } |
| 1262 | thread_data[t].ctlfd_pos = ret; |
| 1263 | pr_debug2("thread_data[%p]: pollfd[%d] <- ctl_fd=%d\n", |
| 1264 | thread_data, thread_data[t].ctlfd_pos, |
| 1265 | thread_data[t].pipes.msg[0]); |
| 1266 | } else { |
| 1267 | thread_data[t].tid = gettid(); |
| 1268 | |
| 1269 | ret = record__dup_non_perf_events(rec, evlist, &thread_data[t]); |
| 1270 | if (ret < 0) |
| 1271 | goto out_free; |
| 1272 | |
| 1273 | thread_data[t].ctlfd_pos = -1; /* Not used */ |
| 1274 | } |
| 1275 | } |
| 1276 | |
| 1277 | return 0; |
| 1278 | |
| 1279 | out_free: |
| 1280 | record__free_thread_data(rec); |
| 1281 | |
| 1282 | return ret; |
| 1283 | } |
| 1284 | |
| 1285 | static int record__mmap_evlist(struct record *rec, |
| 1286 | struct evlist *evlist) |
| 1287 | { |
| 1288 | int i, ret; |
| 1289 | struct record_opts *opts = &rec->opts; |
| 1290 | bool auxtrace_overwrite = opts->auxtrace_snapshot_mode || |
| 1291 | opts->auxtrace_sample_mode; |
| 1292 | char msg[512]; |
| 1293 | |
| 1294 | if (opts->affinity != PERF_AFFINITY_SYS) |
| 1295 | cpu__setup_cpunode_map(); |
| 1296 | |
| 1297 | if (evlist__mmap_ex(evlist, opts->mmap_pages, |
| 1298 | opts->auxtrace_mmap_pages, |
| 1299 | auxtrace_overwrite, |
| 1300 | opts->nr_cblocks, opts->affinity, |
| 1301 | opts->mmap_flush, opts->comp_level) < 0) { |
| 1302 | if (errno == EPERM) { |
| 1303 | pr_err("Permission error mapping pages.\n" |
| 1304 | "Consider increasing " |
| 1305 | "/proc/sys/kernel/perf_event_mlock_kb,\n" |
| 1306 | "or try again with a smaller value of -m/--mmap_pages.\n" |
| 1307 | "(current value: %u,%u)\n", |
| 1308 | opts->mmap_pages, opts->auxtrace_mmap_pages); |
| 1309 | return -errno; |
| 1310 | } else { |
| 1311 | pr_err("failed to mmap with %d (%s)\n", errno, |
| 1312 | str_error_r(errno, msg, sizeof(msg))); |
| 1313 | if (errno) |
| 1314 | return -errno; |
| 1315 | else |
| 1316 | return -EINVAL; |
| 1317 | } |
| 1318 | } |
| 1319 | |
| 1320 | if (evlist__initialize_ctlfd(evlist, opts->ctl_fd, opts->ctl_fd_ack)) |
| 1321 | return -1; |
| 1322 | |
| 1323 | ret = record__alloc_thread_data(rec, evlist); |
| 1324 | if (ret) |
| 1325 | return ret; |
| 1326 | |
| 1327 | if (record__threads_enabled(rec)) { |
| 1328 | ret = perf_data__create_dir(&rec->data, evlist->core.nr_mmaps); |
| 1329 | if (ret) { |
| 1330 | pr_err("Failed to create data directory: %s\n", strerror(-ret)); |
| 1331 | return ret; |
| 1332 | } |
| 1333 | for (i = 0; i < evlist->core.nr_mmaps; i++) { |
| 1334 | if (evlist->mmap) |
| 1335 | evlist->mmap[i].file = &rec->data.dir.files[i]; |
| 1336 | if (evlist->overwrite_mmap) |
| 1337 | evlist->overwrite_mmap[i].file = &rec->data.dir.files[i]; |
| 1338 | } |
| 1339 | } |
| 1340 | |
| 1341 | return 0; |
| 1342 | } |
| 1343 | |
| 1344 | static int record__mmap(struct record *rec) |
| 1345 | { |
| 1346 | return record__mmap_evlist(rec, rec->evlist); |
| 1347 | } |
| 1348 | |
| 1349 | static int record__open(struct record *rec) |
| 1350 | { |
| 1351 | char msg[BUFSIZ]; |
| 1352 | struct evsel *pos; |
| 1353 | struct evlist *evlist = rec->evlist; |
| 1354 | struct perf_session *session = rec->session; |
| 1355 | struct record_opts *opts = &rec->opts; |
| 1356 | int rc = 0; |
| 1357 | |
| 1358 | evlist__for_each_entry(evlist, pos) { |
| 1359 | try_again: |
| 1360 | if (evsel__open(pos, pos->core.cpus, pos->core.threads) < 0) { |
| 1361 | if (evsel__fallback(pos, &opts->target, errno, msg, sizeof(msg))) { |
| 1362 | if (verbose > 0) |
| 1363 | ui__warning("%s\n", msg); |
| 1364 | goto try_again; |
| 1365 | } |
| 1366 | if ((errno == EINVAL || errno == EBADF) && |
| 1367 | pos->core.leader != &pos->core && |
| 1368 | pos->weak_group) { |
| 1369 | pos = evlist__reset_weak_group(evlist, pos, true); |
| 1370 | goto try_again; |
| 1371 | } |
| 1372 | rc = -errno; |
| 1373 | evsel__open_strerror(pos, &opts->target, errno, msg, sizeof(msg)); |
| 1374 | ui__error("%s\n", msg); |
| 1375 | goto out; |
| 1376 | } |
| 1377 | |
| 1378 | pos->supported = true; |
| 1379 | } |
| 1380 | |
| 1381 | if (symbol_conf.kptr_restrict && !evlist__exclude_kernel(evlist)) { |
| 1382 | pr_warning( |
| 1383 | "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n" |
| 1384 | "check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n" |
| 1385 | "Samples in kernel functions may not be resolved if a suitable vmlinux\n" |
| 1386 | "file is not found in the buildid cache or in the vmlinux path.\n\n" |
| 1387 | "Samples in kernel modules won't be resolved at all.\n\n" |
| 1388 | "If some relocation was applied (e.g. kexec) symbols may be misresolved\n" |
| 1389 | "even with a suitable vmlinux or kallsyms file.\n\n"); |
| 1390 | } |
| 1391 | |
| 1392 | if (evlist__apply_filters(evlist, &pos)) { |
| 1393 | pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n", |
| 1394 | pos->filter ?: "BPF", evsel__name(pos), errno, |
| 1395 | str_error_r(errno, msg, sizeof(msg))); |
| 1396 | rc = -1; |
| 1397 | goto out; |
| 1398 | } |
| 1399 | |
| 1400 | rc = record__mmap(rec); |
| 1401 | if (rc) |
| 1402 | goto out; |
| 1403 | |
| 1404 | session->evlist = evlist; |
| 1405 | perf_session__set_id_hdr_size(session); |
| 1406 | out: |
| 1407 | return rc; |
| 1408 | } |
| 1409 | |
| 1410 | static void set_timestamp_boundary(struct record *rec, u64 sample_time) |
| 1411 | { |
| 1412 | if (rec->evlist->first_sample_time == 0) |
| 1413 | rec->evlist->first_sample_time = sample_time; |
| 1414 | |
| 1415 | if (sample_time) |
| 1416 | rec->evlist->last_sample_time = sample_time; |
| 1417 | } |
| 1418 | |
| 1419 | static int process_sample_event(struct perf_tool *tool, |
| 1420 | union perf_event *event, |
| 1421 | struct perf_sample *sample, |
| 1422 | struct evsel *evsel, |
| 1423 | struct machine *machine) |
| 1424 | { |
| 1425 | struct record *rec = container_of(tool, struct record, tool); |
| 1426 | |
| 1427 | set_timestamp_boundary(rec, sample->time); |
| 1428 | |
| 1429 | if (rec->buildid_all) |
| 1430 | return 0; |
| 1431 | |
| 1432 | rec->samples++; |
| 1433 | return build_id__mark_dso_hit(tool, event, sample, evsel, machine); |
| 1434 | } |
| 1435 | |
| 1436 | static int process_buildids(struct record *rec) |
| 1437 | { |
| 1438 | struct perf_session *session = rec->session; |
| 1439 | |
| 1440 | if (perf_data__size(&rec->data) == 0) |
| 1441 | return 0; |
| 1442 | |
| 1443 | /* |
| 1444 | * During this process, it'll load kernel map and replace the |
| 1445 | * dso->long_name to a real pathname it found. In this case |
| 1446 | * we prefer the vmlinux path like |
| 1447 | * /lib/modules/3.16.4/build/vmlinux |
| 1448 | * |
| 1449 | * rather than build-id path (in debug directory). |
| 1450 | * $HOME/.debug/.build-id/f0/6e17aa50adf4d00b88925e03775de107611551 |
| 1451 | */ |
| 1452 | symbol_conf.ignore_vmlinux_buildid = true; |
| 1453 | |
| 1454 | /* |
| 1455 | * If --buildid-all is given, it marks all DSO regardless of hits, |
| 1456 | * so no need to process samples. But if timestamp_boundary is enabled, |
| 1457 | * it still needs to walk on all samples to get the timestamps of |
| 1458 | * first/last samples. |
| 1459 | */ |
| 1460 | if (rec->buildid_all && !rec->timestamp_boundary) |
| 1461 | rec->tool.sample = NULL; |
| 1462 | |
| 1463 | return perf_session__process_events(session); |
| 1464 | } |
| 1465 | |
| 1466 | static void perf_event__synthesize_guest_os(struct machine *machine, void *data) |
| 1467 | { |
| 1468 | int err; |
| 1469 | struct perf_tool *tool = data; |
| 1470 | /* |
| 1471 | *As for guest kernel when processing subcommand record&report, |
| 1472 | *we arrange module mmap prior to guest kernel mmap and trigger |
| 1473 | *a preload dso because default guest module symbols are loaded |
| 1474 | *from guest kallsyms instead of /lib/modules/XXX/XXX. This |
| 1475 | *method is used to avoid symbol missing when the first addr is |
| 1476 | *in module instead of in guest kernel. |
| 1477 | */ |
| 1478 | err = perf_event__synthesize_modules(tool, process_synthesized_event, |
| 1479 | machine); |
| 1480 | if (err < 0) |
| 1481 | pr_err("Couldn't record guest kernel [%d]'s reference" |
| 1482 | " relocation symbol.\n", machine->pid); |
| 1483 | |
| 1484 | /* |
| 1485 | * We use _stext for guest kernel because guest kernel's /proc/kallsyms |
| 1486 | * have no _text sometimes. |
| 1487 | */ |
| 1488 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, |
| 1489 | machine); |
| 1490 | if (err < 0) |
| 1491 | pr_err("Couldn't record guest kernel [%d]'s reference" |
| 1492 | " relocation symbol.\n", machine->pid); |
| 1493 | } |
| 1494 | |
| 1495 | static struct perf_event_header finished_round_event = { |
| 1496 | .size = sizeof(struct perf_event_header), |
| 1497 | .type = PERF_RECORD_FINISHED_ROUND, |
| 1498 | }; |
| 1499 | |
| 1500 | static struct perf_event_header finished_init_event = { |
| 1501 | .size = sizeof(struct perf_event_header), |
| 1502 | .type = PERF_RECORD_FINISHED_INIT, |
| 1503 | }; |
| 1504 | |
| 1505 | static void record__adjust_affinity(struct record *rec, struct mmap *map) |
| 1506 | { |
| 1507 | if (rec->opts.affinity != PERF_AFFINITY_SYS && |
| 1508 | !bitmap_equal(thread->mask->affinity.bits, map->affinity_mask.bits, |
| 1509 | thread->mask->affinity.nbits)) { |
| 1510 | bitmap_zero(thread->mask->affinity.bits, thread->mask->affinity.nbits); |
| 1511 | bitmap_or(thread->mask->affinity.bits, thread->mask->affinity.bits, |
| 1512 | map->affinity_mask.bits, thread->mask->affinity.nbits); |
| 1513 | sched_setaffinity(0, MMAP_CPU_MASK_BYTES(&thread->mask->affinity), |
| 1514 | (cpu_set_t *)thread->mask->affinity.bits); |
| 1515 | if (verbose == 2) { |
| 1516 | pr_debug("threads[%d]: running on cpu%d: ", thread->tid, sched_getcpu()); |
| 1517 | mmap_cpu_mask__scnprintf(&thread->mask->affinity, "affinity"); |
| 1518 | } |
| 1519 | } |
| 1520 | } |
| 1521 | |
| 1522 | static size_t process_comp_header(void *record, size_t increment) |
| 1523 | { |
| 1524 | struct perf_record_compressed *event = record; |
| 1525 | size_t size = sizeof(*event); |
| 1526 | |
| 1527 | if (increment) { |
| 1528 | event->header.size += increment; |
| 1529 | return increment; |
| 1530 | } |
| 1531 | |
| 1532 | event->header.type = PERF_RECORD_COMPRESSED; |
| 1533 | event->header.size = size; |
| 1534 | |
| 1535 | return size; |
| 1536 | } |
| 1537 | |
| 1538 | static ssize_t zstd_compress(struct perf_session *session, struct mmap *map, |
| 1539 | void *dst, size_t dst_size, void *src, size_t src_size) |
| 1540 | { |
| 1541 | ssize_t compressed; |
| 1542 | size_t max_record_size = PERF_SAMPLE_MAX_SIZE - sizeof(struct perf_record_compressed) - 1; |
| 1543 | struct zstd_data *zstd_data = &session->zstd_data; |
| 1544 | |
| 1545 | if (map && map->file) |
| 1546 | zstd_data = &map->zstd_data; |
| 1547 | |
| 1548 | compressed = zstd_compress_stream_to_records(zstd_data, dst, dst_size, src, src_size, |
| 1549 | max_record_size, process_comp_header); |
| 1550 | if (compressed < 0) |
| 1551 | return compressed; |
| 1552 | |
| 1553 | if (map && map->file) { |
| 1554 | thread->bytes_transferred += src_size; |
| 1555 | thread->bytes_compressed += compressed; |
| 1556 | } else { |
| 1557 | session->bytes_transferred += src_size; |
| 1558 | session->bytes_compressed += compressed; |
| 1559 | } |
| 1560 | |
| 1561 | return compressed; |
| 1562 | } |
| 1563 | |
| 1564 | static int record__mmap_read_evlist(struct record *rec, struct evlist *evlist, |
| 1565 | bool overwrite, bool synch) |
| 1566 | { |
| 1567 | u64 bytes_written = rec->bytes_written; |
| 1568 | int i; |
| 1569 | int rc = 0; |
| 1570 | int nr_mmaps; |
| 1571 | struct mmap **maps; |
| 1572 | int trace_fd = rec->data.file.fd; |
| 1573 | off_t off = 0; |
| 1574 | |
| 1575 | if (!evlist) |
| 1576 | return 0; |
| 1577 | |
| 1578 | nr_mmaps = thread->nr_mmaps; |
| 1579 | maps = overwrite ? thread->overwrite_maps : thread->maps; |
| 1580 | |
| 1581 | if (!maps) |
| 1582 | return 0; |
| 1583 | |
| 1584 | if (overwrite && evlist->bkw_mmap_state != BKW_MMAP_DATA_PENDING) |
| 1585 | return 0; |
| 1586 | |
| 1587 | if (record__aio_enabled(rec)) |
| 1588 | off = record__aio_get_pos(trace_fd); |
| 1589 | |
| 1590 | for (i = 0; i < nr_mmaps; i++) { |
| 1591 | u64 flush = 0; |
| 1592 | struct mmap *map = maps[i]; |
| 1593 | |
| 1594 | if (map->core.base) { |
| 1595 | record__adjust_affinity(rec, map); |
| 1596 | if (synch) { |
| 1597 | flush = map->core.flush; |
| 1598 | map->core.flush = 1; |
| 1599 | } |
| 1600 | if (!record__aio_enabled(rec)) { |
| 1601 | if (perf_mmap__push(map, rec, record__pushfn) < 0) { |
| 1602 | if (synch) |
| 1603 | map->core.flush = flush; |
| 1604 | rc = -1; |
| 1605 | goto out; |
| 1606 | } |
| 1607 | } else { |
| 1608 | if (record__aio_push(rec, map, &off) < 0) { |
| 1609 | record__aio_set_pos(trace_fd, off); |
| 1610 | if (synch) |
| 1611 | map->core.flush = flush; |
| 1612 | rc = -1; |
| 1613 | goto out; |
| 1614 | } |
| 1615 | } |
| 1616 | if (synch) |
| 1617 | map->core.flush = flush; |
| 1618 | } |
| 1619 | |
| 1620 | if (map->auxtrace_mmap.base && !rec->opts.auxtrace_snapshot_mode && |
| 1621 | !rec->opts.auxtrace_sample_mode && |
| 1622 | record__auxtrace_mmap_read(rec, map) != 0) { |
| 1623 | rc = -1; |
| 1624 | goto out; |
| 1625 | } |
| 1626 | } |
| 1627 | |
| 1628 | if (record__aio_enabled(rec)) |
| 1629 | record__aio_set_pos(trace_fd, off); |
| 1630 | |
| 1631 | /* |
| 1632 | * Mark the round finished in case we wrote |
| 1633 | * at least one event. |
| 1634 | * |
| 1635 | * No need for round events in directory mode, |
| 1636 | * because per-cpu maps and files have data |
| 1637 | * sorted by kernel. |
| 1638 | */ |
| 1639 | if (!record__threads_enabled(rec) && bytes_written != rec->bytes_written) |
| 1640 | rc = record__write(rec, NULL, &finished_round_event, sizeof(finished_round_event)); |
| 1641 | |
| 1642 | if (overwrite) |
| 1643 | evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY); |
| 1644 | out: |
| 1645 | return rc; |
| 1646 | } |
| 1647 | |
| 1648 | static int record__mmap_read_all(struct record *rec, bool synch) |
| 1649 | { |
| 1650 | int err; |
| 1651 | |
| 1652 | err = record__mmap_read_evlist(rec, rec->evlist, false, synch); |
| 1653 | if (err) |
| 1654 | return err; |
| 1655 | |
| 1656 | return record__mmap_read_evlist(rec, rec->evlist, true, synch); |
| 1657 | } |
| 1658 | |
| 1659 | static void record__thread_munmap_filtered(struct fdarray *fda, int fd, |
| 1660 | void *arg __maybe_unused) |
| 1661 | { |
| 1662 | struct perf_mmap *map = fda->priv[fd].ptr; |
| 1663 | |
| 1664 | if (map) |
| 1665 | perf_mmap__put(map); |
| 1666 | } |
| 1667 | |
| 1668 | static void *record__thread(void *arg) |
| 1669 | { |
| 1670 | enum thread_msg msg = THREAD_MSG__READY; |
| 1671 | bool terminate = false; |
| 1672 | struct fdarray *pollfd; |
| 1673 | int err, ctlfd_pos; |
| 1674 | |
| 1675 | thread = arg; |
| 1676 | thread->tid = gettid(); |
| 1677 | |
| 1678 | err = write(thread->pipes.ack[1], &msg, sizeof(msg)); |
| 1679 | if (err == -1) |
| 1680 | pr_warning("threads[%d]: failed to notify on start: %s\n", |
| 1681 | thread->tid, strerror(errno)); |
| 1682 | |
| 1683 | pr_debug("threads[%d]: started on cpu%d\n", thread->tid, sched_getcpu()); |
| 1684 | |
| 1685 | pollfd = &thread->pollfd; |
| 1686 | ctlfd_pos = thread->ctlfd_pos; |
| 1687 | |
| 1688 | for (;;) { |
| 1689 | unsigned long long hits = thread->samples; |
| 1690 | |
| 1691 | if (record__mmap_read_all(thread->rec, false) < 0 || terminate) |
| 1692 | break; |
| 1693 | |
| 1694 | if (hits == thread->samples) { |
| 1695 | |
| 1696 | err = fdarray__poll(pollfd, -1); |
| 1697 | /* |
| 1698 | * Propagate error, only if there's any. Ignore positive |
| 1699 | * number of returned events and interrupt error. |
| 1700 | */ |
| 1701 | if (err > 0 || (err < 0 && errno == EINTR)) |
| 1702 | err = 0; |
| 1703 | thread->waking++; |
| 1704 | |
| 1705 | if (fdarray__filter(pollfd, POLLERR | POLLHUP, |
| 1706 | record__thread_munmap_filtered, NULL) == 0) |
| 1707 | break; |
| 1708 | } |
| 1709 | |
| 1710 | if (pollfd->entries[ctlfd_pos].revents & POLLHUP) { |
| 1711 | terminate = true; |
| 1712 | close(thread->pipes.msg[0]); |
| 1713 | thread->pipes.msg[0] = -1; |
| 1714 | pollfd->entries[ctlfd_pos].fd = -1; |
| 1715 | pollfd->entries[ctlfd_pos].events = 0; |
| 1716 | } |
| 1717 | |
| 1718 | pollfd->entries[ctlfd_pos].revents = 0; |
| 1719 | } |
| 1720 | record__mmap_read_all(thread->rec, true); |
| 1721 | |
| 1722 | err = write(thread->pipes.ack[1], &msg, sizeof(msg)); |
| 1723 | if (err == -1) |
| 1724 | pr_warning("threads[%d]: failed to notify on termination: %s\n", |
| 1725 | thread->tid, strerror(errno)); |
| 1726 | |
| 1727 | return NULL; |
| 1728 | } |
| 1729 | |
| 1730 | static void record__init_features(struct record *rec) |
| 1731 | { |
| 1732 | struct perf_session *session = rec->session; |
| 1733 | int feat; |
| 1734 | |
| 1735 | for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++) |
| 1736 | perf_header__set_feat(&session->header, feat); |
| 1737 | |
| 1738 | if (rec->no_buildid) |
| 1739 | perf_header__clear_feat(&session->header, HEADER_BUILD_ID); |
| 1740 | |
| 1741 | #ifdef HAVE_LIBTRACEEVENT |
| 1742 | if (!have_tracepoints(&rec->evlist->core.entries)) |
| 1743 | perf_header__clear_feat(&session->header, HEADER_TRACING_DATA); |
| 1744 | #endif |
| 1745 | |
| 1746 | if (!rec->opts.branch_stack) |
| 1747 | perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); |
| 1748 | |
| 1749 | if (!rec->opts.full_auxtrace) |
| 1750 | perf_header__clear_feat(&session->header, HEADER_AUXTRACE); |
| 1751 | |
| 1752 | if (!(rec->opts.use_clockid && rec->opts.clockid_res_ns)) |
| 1753 | perf_header__clear_feat(&session->header, HEADER_CLOCKID); |
| 1754 | |
| 1755 | if (!rec->opts.use_clockid) |
| 1756 | perf_header__clear_feat(&session->header, HEADER_CLOCK_DATA); |
| 1757 | |
| 1758 | if (!record__threads_enabled(rec)) |
| 1759 | perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT); |
| 1760 | |
| 1761 | if (!record__comp_enabled(rec)) |
| 1762 | perf_header__clear_feat(&session->header, HEADER_COMPRESSED); |
| 1763 | |
| 1764 | perf_header__clear_feat(&session->header, HEADER_STAT); |
| 1765 | } |
| 1766 | |
| 1767 | static void |
| 1768 | record__finish_output(struct record *rec) |
| 1769 | { |
| 1770 | int i; |
| 1771 | struct perf_data *data = &rec->data; |
| 1772 | int fd = perf_data__fd(data); |
| 1773 | |
| 1774 | if (data->is_pipe) { |
| 1775 | /* Just to display approx. size */ |
| 1776 | data->file.size = rec->bytes_written; |
| 1777 | return; |
| 1778 | } |
| 1779 | |
| 1780 | rec->session->header.data_size += rec->bytes_written; |
| 1781 | data->file.size = lseek(perf_data__fd(data), 0, SEEK_CUR); |
| 1782 | if (record__threads_enabled(rec)) { |
| 1783 | for (i = 0; i < data->dir.nr; i++) |
| 1784 | data->dir.files[i].size = lseek(data->dir.files[i].fd, 0, SEEK_CUR); |
| 1785 | } |
| 1786 | |
| 1787 | if (!rec->no_buildid) { |
| 1788 | process_buildids(rec); |
| 1789 | |
| 1790 | if (rec->buildid_all) |
| 1791 | perf_session__dsos_hit_all(rec->session); |
| 1792 | } |
| 1793 | perf_session__write_header(rec->session, rec->evlist, fd, true); |
| 1794 | |
| 1795 | return; |
| 1796 | } |
| 1797 | |
| 1798 | static int record__synthesize_workload(struct record *rec, bool tail) |
| 1799 | { |
| 1800 | int err; |
| 1801 | struct perf_thread_map *thread_map; |
| 1802 | bool needs_mmap = rec->opts.synth & PERF_SYNTH_MMAP; |
| 1803 | |
| 1804 | if (rec->opts.tail_synthesize != tail) |
| 1805 | return 0; |
| 1806 | |
| 1807 | thread_map = thread_map__new_by_tid(rec->evlist->workload.pid); |
| 1808 | if (thread_map == NULL) |
| 1809 | return -1; |
| 1810 | |
| 1811 | err = perf_event__synthesize_thread_map(&rec->tool, thread_map, |
| 1812 | process_synthesized_event, |
| 1813 | &rec->session->machines.host, |
| 1814 | needs_mmap, |
| 1815 | rec->opts.sample_address); |
| 1816 | perf_thread_map__put(thread_map); |
| 1817 | return err; |
| 1818 | } |
| 1819 | |
| 1820 | static int write_finished_init(struct record *rec, bool tail) |
| 1821 | { |
| 1822 | if (rec->opts.tail_synthesize != tail) |
| 1823 | return 0; |
| 1824 | |
| 1825 | return record__write(rec, NULL, &finished_init_event, sizeof(finished_init_event)); |
| 1826 | } |
| 1827 | |
| 1828 | static int record__synthesize(struct record *rec, bool tail); |
| 1829 | |
| 1830 | static int |
| 1831 | record__switch_output(struct record *rec, bool at_exit) |
| 1832 | { |
| 1833 | struct perf_data *data = &rec->data; |
| 1834 | char *new_filename = NULL; |
| 1835 | int fd, err; |
| 1836 | |
| 1837 | /* Same Size: "2015122520103046"*/ |
| 1838 | char timestamp[] = "InvalidTimestamp"; |
| 1839 | |
| 1840 | record__aio_mmap_read_sync(rec); |
| 1841 | |
| 1842 | write_finished_init(rec, true); |
| 1843 | |
| 1844 | record__synthesize(rec, true); |
| 1845 | if (target__none(&rec->opts.target)) |
| 1846 | record__synthesize_workload(rec, true); |
| 1847 | |
| 1848 | rec->samples = 0; |
| 1849 | record__finish_output(rec); |
| 1850 | err = fetch_current_timestamp(timestamp, sizeof(timestamp)); |
| 1851 | if (err) { |
| 1852 | pr_err("Failed to get current timestamp\n"); |
| 1853 | return -EINVAL; |
| 1854 | } |
| 1855 | |
| 1856 | fd = perf_data__switch(data, timestamp, |
| 1857 | rec->session->header.data_offset, |
| 1858 | at_exit, &new_filename); |
| 1859 | if (fd >= 0 && !at_exit) { |
| 1860 | rec->bytes_written = 0; |
| 1861 | rec->session->header.data_size = 0; |
| 1862 | } |
| 1863 | |
| 1864 | if (!quiet) { |
| 1865 | fprintf(stderr, "[ perf record: Dump %s.%s ]\n", |
| 1866 | data->path, timestamp); |
| 1867 | } |
| 1868 | |
| 1869 | if (rec->switch_output.num_files) { |
| 1870 | int n = rec->switch_output.cur_file + 1; |
| 1871 | |
| 1872 | if (n >= rec->switch_output.num_files) |
| 1873 | n = 0; |
| 1874 | rec->switch_output.cur_file = n; |
| 1875 | if (rec->switch_output.filenames[n]) { |
| 1876 | remove(rec->switch_output.filenames[n]); |
| 1877 | zfree(&rec->switch_output.filenames[n]); |
| 1878 | } |
| 1879 | rec->switch_output.filenames[n] = new_filename; |
| 1880 | } else { |
| 1881 | free(new_filename); |
| 1882 | } |
| 1883 | |
| 1884 | /* Output tracking events */ |
| 1885 | if (!at_exit) { |
| 1886 | record__synthesize(rec, false); |
| 1887 | |
| 1888 | /* |
| 1889 | * In 'perf record --switch-output' without -a, |
| 1890 | * record__synthesize() in record__switch_output() won't |
| 1891 | * generate tracking events because there's no thread_map |
| 1892 | * in evlist. Which causes newly created perf.data doesn't |
| 1893 | * contain map and comm information. |
| 1894 | * Create a fake thread_map and directly call |
| 1895 | * perf_event__synthesize_thread_map() for those events. |
| 1896 | */ |
| 1897 | if (target__none(&rec->opts.target)) |
| 1898 | record__synthesize_workload(rec, false); |
| 1899 | write_finished_init(rec, false); |
| 1900 | } |
| 1901 | return fd; |
| 1902 | } |
| 1903 | |
| 1904 | static void __record__save_lost_samples(struct record *rec, struct evsel *evsel, |
| 1905 | struct perf_record_lost_samples *lost, |
| 1906 | int cpu_idx, int thread_idx, u64 lost_count, |
| 1907 | u16 misc_flag) |
| 1908 | { |
| 1909 | struct perf_sample_id *sid; |
| 1910 | struct perf_sample sample = {}; |
| 1911 | int id_hdr_size; |
| 1912 | |
| 1913 | lost->lost = lost_count; |
| 1914 | if (evsel->core.ids) { |
| 1915 | sid = xyarray__entry(evsel->core.sample_id, cpu_idx, thread_idx); |
| 1916 | sample.id = sid->id; |
| 1917 | } |
| 1918 | |
| 1919 | id_hdr_size = perf_event__synthesize_id_sample((void *)(lost + 1), |
| 1920 | evsel->core.attr.sample_type, &sample); |
| 1921 | lost->header.size = sizeof(*lost) + id_hdr_size; |
| 1922 | lost->header.misc = misc_flag; |
| 1923 | record__write(rec, NULL, lost, lost->header.size); |
| 1924 | } |
| 1925 | |
| 1926 | static void record__read_lost_samples(struct record *rec) |
| 1927 | { |
| 1928 | struct perf_session *session = rec->session; |
| 1929 | struct perf_record_lost_samples_and_ids lost; |
| 1930 | struct evsel *evsel; |
| 1931 | |
| 1932 | /* there was an error during record__open */ |
| 1933 | if (session->evlist == NULL) |
| 1934 | return; |
| 1935 | |
| 1936 | evlist__for_each_entry(session->evlist, evsel) { |
| 1937 | struct xyarray *xy = evsel->core.sample_id; |
| 1938 | u64 lost_count; |
| 1939 | |
| 1940 | if (xy == NULL || evsel->core.fd == NULL) |
| 1941 | continue; |
| 1942 | if (xyarray__max_x(evsel->core.fd) != xyarray__max_x(xy) || |
| 1943 | xyarray__max_y(evsel->core.fd) != xyarray__max_y(xy)) { |
| 1944 | pr_debug("Unmatched FD vs. sample ID: skip reading LOST count\n"); |
| 1945 | continue; |
| 1946 | } |
| 1947 | |
| 1948 | for (int x = 0; x < xyarray__max_x(xy); x++) { |
| 1949 | for (int y = 0; y < xyarray__max_y(xy); y++) { |
| 1950 | struct perf_counts_values count; |
| 1951 | |
| 1952 | if (perf_evsel__read(&evsel->core, x, y, &count) < 0) { |
| 1953 | pr_debug("read LOST count failed\n"); |
| 1954 | return; |
| 1955 | } |
| 1956 | |
| 1957 | if (count.lost) { |
| 1958 | memset(&lost, 0, sizeof(lost)); |
| 1959 | lost.lost.header.type = PERF_RECORD_LOST_SAMPLES; |
| 1960 | __record__save_lost_samples(rec, evsel, &lost.lost, |
| 1961 | x, y, count.lost, 0); |
| 1962 | } |
| 1963 | } |
| 1964 | } |
| 1965 | |
| 1966 | lost_count = perf_bpf_filter__lost_count(evsel); |
| 1967 | if (lost_count) { |
| 1968 | memset(&lost, 0, sizeof(lost)); |
| 1969 | lost.lost.header.type = PERF_RECORD_LOST_SAMPLES; |
| 1970 | __record__save_lost_samples(rec, evsel, &lost.lost, 0, 0, lost_count, |
| 1971 | PERF_RECORD_MISC_LOST_SAMPLES_BPF); |
| 1972 | } |
| 1973 | } |
| 1974 | } |
| 1975 | |
| 1976 | static volatile sig_atomic_t workload_exec_errno; |
| 1977 | |
| 1978 | /* |
| 1979 | * evlist__prepare_workload will send a SIGUSR1 |
| 1980 | * if the fork fails, since we asked by setting its |
| 1981 | * want_signal to true. |
| 1982 | */ |
| 1983 | static void workload_exec_failed_signal(int signo __maybe_unused, |
| 1984 | siginfo_t *info, |
| 1985 | void *ucontext __maybe_unused) |
| 1986 | { |
| 1987 | workload_exec_errno = info->si_value.sival_int; |
| 1988 | done = 1; |
| 1989 | child_finished = 1; |
| 1990 | } |
| 1991 | |
| 1992 | static void snapshot_sig_handler(int sig); |
| 1993 | static void alarm_sig_handler(int sig); |
| 1994 | |
| 1995 | static const struct perf_event_mmap_page *evlist__pick_pc(struct evlist *evlist) |
| 1996 | { |
| 1997 | if (evlist) { |
| 1998 | if (evlist->mmap && evlist->mmap[0].core.base) |
| 1999 | return evlist->mmap[0].core.base; |
| 2000 | if (evlist->overwrite_mmap && evlist->overwrite_mmap[0].core.base) |
| 2001 | return evlist->overwrite_mmap[0].core.base; |
| 2002 | } |
| 2003 | return NULL; |
| 2004 | } |
| 2005 | |
| 2006 | static const struct perf_event_mmap_page *record__pick_pc(struct record *rec) |
| 2007 | { |
| 2008 | const struct perf_event_mmap_page *pc = evlist__pick_pc(rec->evlist); |
| 2009 | if (pc) |
| 2010 | return pc; |
| 2011 | return NULL; |
| 2012 | } |
| 2013 | |
| 2014 | static int record__synthesize(struct record *rec, bool tail) |
| 2015 | { |
| 2016 | struct perf_session *session = rec->session; |
| 2017 | struct machine *machine = &session->machines.host; |
| 2018 | struct perf_data *data = &rec->data; |
| 2019 | struct record_opts *opts = &rec->opts; |
| 2020 | struct perf_tool *tool = &rec->tool; |
| 2021 | int err = 0; |
| 2022 | event_op f = process_synthesized_event; |
| 2023 | |
| 2024 | if (rec->opts.tail_synthesize != tail) |
| 2025 | return 0; |
| 2026 | |
| 2027 | if (data->is_pipe) { |
| 2028 | err = perf_event__synthesize_for_pipe(tool, session, data, |
| 2029 | process_synthesized_event); |
| 2030 | if (err < 0) |
| 2031 | goto out; |
| 2032 | |
| 2033 | rec->bytes_written += err; |
| 2034 | } |
| 2035 | |
| 2036 | err = perf_event__synth_time_conv(record__pick_pc(rec), tool, |
| 2037 | process_synthesized_event, machine); |
| 2038 | if (err) |
| 2039 | goto out; |
| 2040 | |
| 2041 | /* Synthesize id_index before auxtrace_info */ |
| 2042 | err = perf_event__synthesize_id_index(tool, |
| 2043 | process_synthesized_event, |
| 2044 | session->evlist, machine); |
| 2045 | if (err) |
| 2046 | goto out; |
| 2047 | |
| 2048 | if (rec->opts.full_auxtrace) { |
| 2049 | err = perf_event__synthesize_auxtrace_info(rec->itr, tool, |
| 2050 | session, process_synthesized_event); |
| 2051 | if (err) |
| 2052 | goto out; |
| 2053 | } |
| 2054 | |
| 2055 | if (!evlist__exclude_kernel(rec->evlist)) { |
| 2056 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, |
| 2057 | machine); |
| 2058 | WARN_ONCE(err < 0, "Couldn't record kernel reference relocation symbol\n" |
| 2059 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" |
| 2060 | "Check /proc/kallsyms permission or run as root.\n"); |
| 2061 | |
| 2062 | err = perf_event__synthesize_modules(tool, process_synthesized_event, |
| 2063 | machine); |
| 2064 | WARN_ONCE(err < 0, "Couldn't record kernel module information.\n" |
| 2065 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" |
| 2066 | "Check /proc/modules permission or run as root.\n"); |
| 2067 | } |
| 2068 | |
| 2069 | if (perf_guest) { |
| 2070 | machines__process_guests(&session->machines, |
| 2071 | perf_event__synthesize_guest_os, tool); |
| 2072 | } |
| 2073 | |
| 2074 | err = perf_event__synthesize_extra_attr(&rec->tool, |
| 2075 | rec->evlist, |
| 2076 | process_synthesized_event, |
| 2077 | data->is_pipe); |
| 2078 | if (err) |
| 2079 | goto out; |
| 2080 | |
| 2081 | err = perf_event__synthesize_thread_map2(&rec->tool, rec->evlist->core.threads, |
| 2082 | process_synthesized_event, |
| 2083 | NULL); |
| 2084 | if (err < 0) { |
| 2085 | pr_err("Couldn't synthesize thread map.\n"); |
| 2086 | return err; |
| 2087 | } |
| 2088 | |
| 2089 | err = perf_event__synthesize_cpu_map(&rec->tool, rec->evlist->core.all_cpus, |
| 2090 | process_synthesized_event, NULL); |
| 2091 | if (err < 0) { |
| 2092 | pr_err("Couldn't synthesize cpu map.\n"); |
| 2093 | return err; |
| 2094 | } |
| 2095 | |
| 2096 | err = perf_event__synthesize_bpf_events(session, process_synthesized_event, |
| 2097 | machine, opts); |
| 2098 | if (err < 0) { |
| 2099 | pr_warning("Couldn't synthesize bpf events.\n"); |
| 2100 | err = 0; |
| 2101 | } |
| 2102 | |
| 2103 | if (rec->opts.synth & PERF_SYNTH_CGROUP) { |
| 2104 | err = perf_event__synthesize_cgroups(tool, process_synthesized_event, |
| 2105 | machine); |
| 2106 | if (err < 0) { |
| 2107 | pr_warning("Couldn't synthesize cgroup events.\n"); |
| 2108 | err = 0; |
| 2109 | } |
| 2110 | } |
| 2111 | |
| 2112 | if (rec->opts.nr_threads_synthesize > 1) { |
| 2113 | mutex_init(&synth_lock); |
| 2114 | perf_set_multithreaded(); |
| 2115 | f = process_locked_synthesized_event; |
| 2116 | } |
| 2117 | |
| 2118 | if (rec->opts.synth & PERF_SYNTH_TASK) { |
| 2119 | bool needs_mmap = rec->opts.synth & PERF_SYNTH_MMAP; |
| 2120 | |
| 2121 | err = __machine__synthesize_threads(machine, tool, &opts->target, |
| 2122 | rec->evlist->core.threads, |
| 2123 | f, needs_mmap, opts->sample_address, |
| 2124 | rec->opts.nr_threads_synthesize); |
| 2125 | } |
| 2126 | |
| 2127 | if (rec->opts.nr_threads_synthesize > 1) { |
| 2128 | perf_set_singlethreaded(); |
| 2129 | mutex_destroy(&synth_lock); |
| 2130 | } |
| 2131 | |
| 2132 | out: |
| 2133 | return err; |
| 2134 | } |
| 2135 | |
| 2136 | static int record__process_signal_event(union perf_event *event __maybe_unused, void *data) |
| 2137 | { |
| 2138 | struct record *rec = data; |
| 2139 | pthread_kill(rec->thread_id, SIGUSR2); |
| 2140 | return 0; |
| 2141 | } |
| 2142 | |
| 2143 | static int record__setup_sb_evlist(struct record *rec) |
| 2144 | { |
| 2145 | struct record_opts *opts = &rec->opts; |
| 2146 | |
| 2147 | if (rec->sb_evlist != NULL) { |
| 2148 | /* |
| 2149 | * We get here if --switch-output-event populated the |
| 2150 | * sb_evlist, so associate a callback that will send a SIGUSR2 |
| 2151 | * to the main thread. |
| 2152 | */ |
| 2153 | evlist__set_cb(rec->sb_evlist, record__process_signal_event, rec); |
| 2154 | rec->thread_id = pthread_self(); |
| 2155 | } |
| 2156 | #ifdef HAVE_LIBBPF_SUPPORT |
| 2157 | if (!opts->no_bpf_event) { |
| 2158 | if (rec->sb_evlist == NULL) { |
| 2159 | rec->sb_evlist = evlist__new(); |
| 2160 | |
| 2161 | if (rec->sb_evlist == NULL) { |
| 2162 | pr_err("Couldn't create side band evlist.\n."); |
| 2163 | return -1; |
| 2164 | } |
| 2165 | } |
| 2166 | |
| 2167 | if (evlist__add_bpf_sb_event(rec->sb_evlist, &rec->session->header.env)) { |
| 2168 | pr_err("Couldn't ask for PERF_RECORD_BPF_EVENT side band events.\n."); |
| 2169 | return -1; |
| 2170 | } |
| 2171 | } |
| 2172 | #endif |
| 2173 | if (evlist__start_sb_thread(rec->sb_evlist, &rec->opts.target)) { |
| 2174 | pr_debug("Couldn't start the BPF side band thread:\nBPF programs starting from now on won't be annotatable\n"); |
| 2175 | opts->no_bpf_event = true; |
| 2176 | } |
| 2177 | |
| 2178 | return 0; |
| 2179 | } |
| 2180 | |
| 2181 | static int record__init_clock(struct record *rec) |
| 2182 | { |
| 2183 | struct perf_session *session = rec->session; |
| 2184 | struct timespec ref_clockid; |
| 2185 | struct timeval ref_tod; |
| 2186 | u64 ref; |
| 2187 | |
| 2188 | if (!rec->opts.use_clockid) |
| 2189 | return 0; |
| 2190 | |
| 2191 | if (rec->opts.use_clockid && rec->opts.clockid_res_ns) |
| 2192 | session->header.env.clock.clockid_res_ns = rec->opts.clockid_res_ns; |
| 2193 | |
| 2194 | session->header.env.clock.clockid = rec->opts.clockid; |
| 2195 | |
| 2196 | if (gettimeofday(&ref_tod, NULL) != 0) { |
| 2197 | pr_err("gettimeofday failed, cannot set reference time.\n"); |
| 2198 | return -1; |
| 2199 | } |
| 2200 | |
| 2201 | if (clock_gettime(rec->opts.clockid, &ref_clockid)) { |
| 2202 | pr_err("clock_gettime failed, cannot set reference time.\n"); |
| 2203 | return -1; |
| 2204 | } |
| 2205 | |
| 2206 | ref = (u64) ref_tod.tv_sec * NSEC_PER_SEC + |
| 2207 | (u64) ref_tod.tv_usec * NSEC_PER_USEC; |
| 2208 | |
| 2209 | session->header.env.clock.tod_ns = ref; |
| 2210 | |
| 2211 | ref = (u64) ref_clockid.tv_sec * NSEC_PER_SEC + |
| 2212 | (u64) ref_clockid.tv_nsec; |
| 2213 | |
| 2214 | session->header.env.clock.clockid_ns = ref; |
| 2215 | return 0; |
| 2216 | } |
| 2217 | |
| 2218 | static void hit_auxtrace_snapshot_trigger(struct record *rec) |
| 2219 | { |
| 2220 | if (trigger_is_ready(&auxtrace_snapshot_trigger)) { |
| 2221 | trigger_hit(&auxtrace_snapshot_trigger); |
| 2222 | auxtrace_record__snapshot_started = 1; |
| 2223 | if (auxtrace_record__snapshot_start(rec->itr)) |
| 2224 | trigger_error(&auxtrace_snapshot_trigger); |
| 2225 | } |
| 2226 | } |
| 2227 | |
| 2228 | static int record__terminate_thread(struct record_thread *thread_data) |
| 2229 | { |
| 2230 | int err; |
| 2231 | enum thread_msg ack = THREAD_MSG__UNDEFINED; |
| 2232 | pid_t tid = thread_data->tid; |
| 2233 | |
| 2234 | close(thread_data->pipes.msg[1]); |
| 2235 | thread_data->pipes.msg[1] = -1; |
| 2236 | err = read(thread_data->pipes.ack[0], &ack, sizeof(ack)); |
| 2237 | if (err > 0) |
| 2238 | pr_debug2("threads[%d]: sent %s\n", tid, thread_msg_tags[ack]); |
| 2239 | else |
| 2240 | pr_warning("threads[%d]: failed to receive termination notification from %d\n", |
| 2241 | thread->tid, tid); |
| 2242 | |
| 2243 | return 0; |
| 2244 | } |
| 2245 | |
| 2246 | static int record__start_threads(struct record *rec) |
| 2247 | { |
| 2248 | int t, tt, err, ret = 0, nr_threads = rec->nr_threads; |
| 2249 | struct record_thread *thread_data = rec->thread_data; |
| 2250 | sigset_t full, mask; |
| 2251 | pthread_t handle; |
| 2252 | pthread_attr_t attrs; |
| 2253 | |
| 2254 | thread = &thread_data[0]; |
| 2255 | |
| 2256 | if (!record__threads_enabled(rec)) |
| 2257 | return 0; |
| 2258 | |
| 2259 | sigfillset(&full); |
| 2260 | if (sigprocmask(SIG_SETMASK, &full, &mask)) { |
| 2261 | pr_err("Failed to block signals on threads start: %s\n", strerror(errno)); |
| 2262 | return -1; |
| 2263 | } |
| 2264 | |
| 2265 | pthread_attr_init(&attrs); |
| 2266 | pthread_attr_setdetachstate(&attrs, PTHREAD_CREATE_DETACHED); |
| 2267 | |
| 2268 | for (t = 1; t < nr_threads; t++) { |
| 2269 | enum thread_msg msg = THREAD_MSG__UNDEFINED; |
| 2270 | |
| 2271 | #ifdef HAVE_PTHREAD_ATTR_SETAFFINITY_NP |
| 2272 | pthread_attr_setaffinity_np(&attrs, |
| 2273 | MMAP_CPU_MASK_BYTES(&(thread_data[t].mask->affinity)), |
| 2274 | (cpu_set_t *)(thread_data[t].mask->affinity.bits)); |
| 2275 | #endif |
| 2276 | if (pthread_create(&handle, &attrs, record__thread, &thread_data[t])) { |
| 2277 | for (tt = 1; tt < t; tt++) |
| 2278 | record__terminate_thread(&thread_data[t]); |
| 2279 | pr_err("Failed to start threads: %s\n", strerror(errno)); |
| 2280 | ret = -1; |
| 2281 | goto out_err; |
| 2282 | } |
| 2283 | |
| 2284 | err = read(thread_data[t].pipes.ack[0], &msg, sizeof(msg)); |
| 2285 | if (err > 0) |
| 2286 | pr_debug2("threads[%d]: sent %s\n", rec->thread_data[t].tid, |
| 2287 | thread_msg_tags[msg]); |
| 2288 | else |
| 2289 | pr_warning("threads[%d]: failed to receive start notification from %d\n", |
| 2290 | thread->tid, rec->thread_data[t].tid); |
| 2291 | } |
| 2292 | |
| 2293 | sched_setaffinity(0, MMAP_CPU_MASK_BYTES(&thread->mask->affinity), |
| 2294 | (cpu_set_t *)thread->mask->affinity.bits); |
| 2295 | |
| 2296 | pr_debug("threads[%d]: started on cpu%d\n", thread->tid, sched_getcpu()); |
| 2297 | |
| 2298 | out_err: |
| 2299 | pthread_attr_destroy(&attrs); |
| 2300 | |
| 2301 | if (sigprocmask(SIG_SETMASK, &mask, NULL)) { |
| 2302 | pr_err("Failed to unblock signals on threads start: %s\n", strerror(errno)); |
| 2303 | ret = -1; |
| 2304 | } |
| 2305 | |
| 2306 | return ret; |
| 2307 | } |
| 2308 | |
| 2309 | static int record__stop_threads(struct record *rec) |
| 2310 | { |
| 2311 | int t; |
| 2312 | struct record_thread *thread_data = rec->thread_data; |
| 2313 | |
| 2314 | for (t = 1; t < rec->nr_threads; t++) |
| 2315 | record__terminate_thread(&thread_data[t]); |
| 2316 | |
| 2317 | for (t = 0; t < rec->nr_threads; t++) { |
| 2318 | rec->samples += thread_data[t].samples; |
| 2319 | if (!record__threads_enabled(rec)) |
| 2320 | continue; |
| 2321 | rec->session->bytes_transferred += thread_data[t].bytes_transferred; |
| 2322 | rec->session->bytes_compressed += thread_data[t].bytes_compressed; |
| 2323 | pr_debug("threads[%d]: samples=%lld, wakes=%ld, ", thread_data[t].tid, |
| 2324 | thread_data[t].samples, thread_data[t].waking); |
| 2325 | if (thread_data[t].bytes_transferred && thread_data[t].bytes_compressed) |
| 2326 | pr_debug("transferred=%" PRIu64 ", compressed=%" PRIu64 "\n", |
| 2327 | thread_data[t].bytes_transferred, thread_data[t].bytes_compressed); |
| 2328 | else |
| 2329 | pr_debug("written=%" PRIu64 "\n", thread_data[t].bytes_written); |
| 2330 | } |
| 2331 | |
| 2332 | return 0; |
| 2333 | } |
| 2334 | |
| 2335 | static unsigned long record__waking(struct record *rec) |
| 2336 | { |
| 2337 | int t; |
| 2338 | unsigned long waking = 0; |
| 2339 | struct record_thread *thread_data = rec->thread_data; |
| 2340 | |
| 2341 | for (t = 0; t < rec->nr_threads; t++) |
| 2342 | waking += thread_data[t].waking; |
| 2343 | |
| 2344 | return waking; |
| 2345 | } |
| 2346 | |
| 2347 | static int __cmd_record(struct record *rec, int argc, const char **argv) |
| 2348 | { |
| 2349 | int err; |
| 2350 | int status = 0; |
| 2351 | const bool forks = argc > 0; |
| 2352 | struct perf_tool *tool = &rec->tool; |
| 2353 | struct record_opts *opts = &rec->opts; |
| 2354 | struct perf_data *data = &rec->data; |
| 2355 | struct perf_session *session; |
| 2356 | bool disabled = false, draining = false; |
| 2357 | int fd; |
| 2358 | float ratio = 0; |
| 2359 | enum evlist_ctl_cmd cmd = EVLIST_CTL_CMD_UNSUPPORTED; |
| 2360 | |
| 2361 | atexit(record__sig_exit); |
| 2362 | signal(SIGCHLD, sig_handler); |
| 2363 | signal(SIGINT, sig_handler); |
| 2364 | signal(SIGTERM, sig_handler); |
| 2365 | signal(SIGSEGV, sigsegv_handler); |
| 2366 | |
| 2367 | if (rec->opts.record_namespaces) |
| 2368 | tool->namespace_events = true; |
| 2369 | |
| 2370 | if (rec->opts.record_cgroup) { |
| 2371 | #ifdef HAVE_FILE_HANDLE |
| 2372 | tool->cgroup_events = true; |
| 2373 | #else |
| 2374 | pr_err("cgroup tracking is not supported\n"); |
| 2375 | return -1; |
| 2376 | #endif |
| 2377 | } |
| 2378 | |
| 2379 | if (rec->opts.auxtrace_snapshot_mode || rec->switch_output.enabled) { |
| 2380 | signal(SIGUSR2, snapshot_sig_handler); |
| 2381 | if (rec->opts.auxtrace_snapshot_mode) |
| 2382 | trigger_on(&auxtrace_snapshot_trigger); |
| 2383 | if (rec->switch_output.enabled) |
| 2384 | trigger_on(&switch_output_trigger); |
| 2385 | } else { |
| 2386 | signal(SIGUSR2, SIG_IGN); |
| 2387 | } |
| 2388 | |
| 2389 | session = perf_session__new(data, tool); |
| 2390 | if (IS_ERR(session)) { |
| 2391 | pr_err("Perf session creation failed.\n"); |
| 2392 | return PTR_ERR(session); |
| 2393 | } |
| 2394 | |
| 2395 | if (record__threads_enabled(rec)) { |
| 2396 | if (perf_data__is_pipe(&rec->data)) { |
| 2397 | pr_err("Parallel trace streaming is not available in pipe mode.\n"); |
| 2398 | return -1; |
| 2399 | } |
| 2400 | if (rec->opts.full_auxtrace) { |
| 2401 | pr_err("Parallel trace streaming is not available in AUX area tracing mode.\n"); |
| 2402 | return -1; |
| 2403 | } |
| 2404 | } |
| 2405 | |
| 2406 | fd = perf_data__fd(data); |
| 2407 | rec->session = session; |
| 2408 | |
| 2409 | if (zstd_init(&session->zstd_data, rec->opts.comp_level) < 0) { |
| 2410 | pr_err("Compression initialization failed.\n"); |
| 2411 | return -1; |
| 2412 | } |
| 2413 | #ifdef HAVE_EVENTFD_SUPPORT |
| 2414 | done_fd = eventfd(0, EFD_NONBLOCK); |
| 2415 | if (done_fd < 0) { |
| 2416 | pr_err("Failed to create wakeup eventfd, error: %m\n"); |
| 2417 | status = -1; |
| 2418 | goto out_delete_session; |
| 2419 | } |
| 2420 | err = evlist__add_wakeup_eventfd(rec->evlist, done_fd); |
| 2421 | if (err < 0) { |
| 2422 | pr_err("Failed to add wakeup eventfd to poll list\n"); |
| 2423 | status = err; |
| 2424 | goto out_delete_session; |
| 2425 | } |
| 2426 | #endif // HAVE_EVENTFD_SUPPORT |
| 2427 | |
| 2428 | session->header.env.comp_type = PERF_COMP_ZSTD; |
| 2429 | session->header.env.comp_level = rec->opts.comp_level; |
| 2430 | |
| 2431 | if (rec->opts.kcore && |
| 2432 | !record__kcore_readable(&session->machines.host)) { |
| 2433 | pr_err("ERROR: kcore is not readable.\n"); |
| 2434 | return -1; |
| 2435 | } |
| 2436 | |
| 2437 | if (record__init_clock(rec)) |
| 2438 | return -1; |
| 2439 | |
| 2440 | record__init_features(rec); |
| 2441 | |
| 2442 | if (forks) { |
| 2443 | err = evlist__prepare_workload(rec->evlist, &opts->target, argv, data->is_pipe, |
| 2444 | workload_exec_failed_signal); |
| 2445 | if (err < 0) { |
| 2446 | pr_err("Couldn't run the workload!\n"); |
| 2447 | status = err; |
| 2448 | goto out_delete_session; |
| 2449 | } |
| 2450 | } |
| 2451 | |
| 2452 | /* |
| 2453 | * If we have just single event and are sending data |
| 2454 | * through pipe, we need to force the ids allocation, |
| 2455 | * because we synthesize event name through the pipe |
| 2456 | * and need the id for that. |
| 2457 | */ |
| 2458 | if (data->is_pipe && rec->evlist->core.nr_entries == 1) |
| 2459 | rec->opts.sample_id = true; |
| 2460 | |
| 2461 | if (rec->timestamp_filename && perf_data__is_pipe(data)) { |
| 2462 | rec->timestamp_filename = false; |
| 2463 | pr_warning("WARNING: --timestamp-filename option is not available in pipe mode.\n"); |
| 2464 | } |
| 2465 | |
| 2466 | evlist__uniquify_name(rec->evlist); |
| 2467 | |
| 2468 | evlist__config(rec->evlist, opts, &callchain_param); |
| 2469 | |
| 2470 | /* Debug message used by test scripts */ |
| 2471 | pr_debug3("perf record opening and mmapping events\n"); |
| 2472 | if (record__open(rec) != 0) { |
| 2473 | err = -1; |
| 2474 | goto out_free_threads; |
| 2475 | } |
| 2476 | /* Debug message used by test scripts */ |
| 2477 | pr_debug3("perf record done opening and mmapping events\n"); |
| 2478 | session->header.env.comp_mmap_len = session->evlist->core.mmap_len; |
| 2479 | |
| 2480 | if (rec->opts.kcore) { |
| 2481 | err = record__kcore_copy(&session->machines.host, data); |
| 2482 | if (err) { |
| 2483 | pr_err("ERROR: Failed to copy kcore\n"); |
| 2484 | goto out_free_threads; |
| 2485 | } |
| 2486 | } |
| 2487 | |
| 2488 | /* |
| 2489 | * Normally perf_session__new would do this, but it doesn't have the |
| 2490 | * evlist. |
| 2491 | */ |
| 2492 | if (rec->tool.ordered_events && !evlist__sample_id_all(rec->evlist)) { |
| 2493 | pr_warning("WARNING: No sample_id_all support, falling back to unordered processing\n"); |
| 2494 | rec->tool.ordered_events = false; |
| 2495 | } |
| 2496 | |
| 2497 | if (evlist__nr_groups(rec->evlist) == 0) |
| 2498 | perf_header__clear_feat(&session->header, HEADER_GROUP_DESC); |
| 2499 | |
| 2500 | if (data->is_pipe) { |
| 2501 | err = perf_header__write_pipe(fd); |
| 2502 | if (err < 0) |
| 2503 | goto out_free_threads; |
| 2504 | } else { |
| 2505 | err = perf_session__write_header(session, rec->evlist, fd, false); |
| 2506 | if (err < 0) |
| 2507 | goto out_free_threads; |
| 2508 | } |
| 2509 | |
| 2510 | err = -1; |
| 2511 | if (!rec->no_buildid |
| 2512 | && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) { |
| 2513 | pr_err("Couldn't generate buildids. " |
| 2514 | "Use --no-buildid to profile anyway.\n"); |
| 2515 | goto out_free_threads; |
| 2516 | } |
| 2517 | |
| 2518 | err = record__setup_sb_evlist(rec); |
| 2519 | if (err) |
| 2520 | goto out_free_threads; |
| 2521 | |
| 2522 | err = record__synthesize(rec, false); |
| 2523 | if (err < 0) |
| 2524 | goto out_free_threads; |
| 2525 | |
| 2526 | if (rec->realtime_prio) { |
| 2527 | struct sched_param param; |
| 2528 | |
| 2529 | param.sched_priority = rec->realtime_prio; |
| 2530 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { |
| 2531 | pr_err("Could not set realtime priority.\n"); |
| 2532 | err = -1; |
| 2533 | goto out_free_threads; |
| 2534 | } |
| 2535 | } |
| 2536 | |
| 2537 | if (record__start_threads(rec)) |
| 2538 | goto out_free_threads; |
| 2539 | |
| 2540 | /* |
| 2541 | * When perf is starting the traced process, all the events |
| 2542 | * (apart from group members) have enable_on_exec=1 set, |
| 2543 | * so don't spoil it by prematurely enabling them. |
| 2544 | */ |
| 2545 | if (!target__none(&opts->target) && !opts->target.initial_delay) |
| 2546 | evlist__enable(rec->evlist); |
| 2547 | |
| 2548 | /* |
| 2549 | * Let the child rip |
| 2550 | */ |
| 2551 | if (forks) { |
| 2552 | struct machine *machine = &session->machines.host; |
| 2553 | union perf_event *event; |
| 2554 | pid_t tgid; |
| 2555 | |
| 2556 | event = malloc(sizeof(event->comm) + machine->id_hdr_size); |
| 2557 | if (event == NULL) { |
| 2558 | err = -ENOMEM; |
| 2559 | goto out_child; |
| 2560 | } |
| 2561 | |
| 2562 | /* |
| 2563 | * Some H/W events are generated before COMM event |
| 2564 | * which is emitted during exec(), so perf script |
| 2565 | * cannot see a correct process name for those events. |
| 2566 | * Synthesize COMM event to prevent it. |
| 2567 | */ |
| 2568 | tgid = perf_event__synthesize_comm(tool, event, |
| 2569 | rec->evlist->workload.pid, |
| 2570 | process_synthesized_event, |
| 2571 | machine); |
| 2572 | free(event); |
| 2573 | |
| 2574 | if (tgid == -1) |
| 2575 | goto out_child; |
| 2576 | |
| 2577 | event = malloc(sizeof(event->namespaces) + |
| 2578 | (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + |
| 2579 | machine->id_hdr_size); |
| 2580 | if (event == NULL) { |
| 2581 | err = -ENOMEM; |
| 2582 | goto out_child; |
| 2583 | } |
| 2584 | |
| 2585 | /* |
| 2586 | * Synthesize NAMESPACES event for the command specified. |
| 2587 | */ |
| 2588 | perf_event__synthesize_namespaces(tool, event, |
| 2589 | rec->evlist->workload.pid, |
| 2590 | tgid, process_synthesized_event, |
| 2591 | machine); |
| 2592 | free(event); |
| 2593 | |
| 2594 | evlist__start_workload(rec->evlist); |
| 2595 | } |
| 2596 | |
| 2597 | if (opts->target.initial_delay) { |
| 2598 | pr_info(EVLIST_DISABLED_MSG); |
| 2599 | if (opts->target.initial_delay > 0) { |
| 2600 | usleep(opts->target.initial_delay * USEC_PER_MSEC); |
| 2601 | evlist__enable(rec->evlist); |
| 2602 | pr_info(EVLIST_ENABLED_MSG); |
| 2603 | } |
| 2604 | } |
| 2605 | |
| 2606 | err = event_enable_timer__start(rec->evlist->eet); |
| 2607 | if (err) |
| 2608 | goto out_child; |
| 2609 | |
| 2610 | /* Debug message used by test scripts */ |
| 2611 | pr_debug3("perf record has started\n"); |
| 2612 | fflush(stderr); |
| 2613 | |
| 2614 | trigger_ready(&auxtrace_snapshot_trigger); |
| 2615 | trigger_ready(&switch_output_trigger); |
| 2616 | perf_hooks__invoke_record_start(); |
| 2617 | |
| 2618 | /* |
| 2619 | * Must write FINISHED_INIT so it will be seen after all other |
| 2620 | * synthesized user events, but before any regular events. |
| 2621 | */ |
| 2622 | err = write_finished_init(rec, false); |
| 2623 | if (err < 0) |
| 2624 | goto out_child; |
| 2625 | |
| 2626 | for (;;) { |
| 2627 | unsigned long long hits = thread->samples; |
| 2628 | |
| 2629 | /* |
| 2630 | * rec->evlist->bkw_mmap_state is possible to be |
| 2631 | * BKW_MMAP_EMPTY here: when done == true and |
| 2632 | * hits != rec->samples in previous round. |
| 2633 | * |
| 2634 | * evlist__toggle_bkw_mmap ensure we never |
| 2635 | * convert BKW_MMAP_EMPTY to BKW_MMAP_DATA_PENDING. |
| 2636 | */ |
| 2637 | if (trigger_is_hit(&switch_output_trigger) || done || draining) |
| 2638 | evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_DATA_PENDING); |
| 2639 | |
| 2640 | if (record__mmap_read_all(rec, false) < 0) { |
| 2641 | trigger_error(&auxtrace_snapshot_trigger); |
| 2642 | trigger_error(&switch_output_trigger); |
| 2643 | err = -1; |
| 2644 | goto out_child; |
| 2645 | } |
| 2646 | |
| 2647 | if (auxtrace_record__snapshot_started) { |
| 2648 | auxtrace_record__snapshot_started = 0; |
| 2649 | if (!trigger_is_error(&auxtrace_snapshot_trigger)) |
| 2650 | record__read_auxtrace_snapshot(rec, false); |
| 2651 | if (trigger_is_error(&auxtrace_snapshot_trigger)) { |
| 2652 | pr_err("AUX area tracing snapshot failed\n"); |
| 2653 | err = -1; |
| 2654 | goto out_child; |
| 2655 | } |
| 2656 | } |
| 2657 | |
| 2658 | if (trigger_is_hit(&switch_output_trigger)) { |
| 2659 | /* |
| 2660 | * If switch_output_trigger is hit, the data in |
| 2661 | * overwritable ring buffer should have been collected, |
| 2662 | * so bkw_mmap_state should be set to BKW_MMAP_EMPTY. |
| 2663 | * |
| 2664 | * If SIGUSR2 raise after or during record__mmap_read_all(), |
| 2665 | * record__mmap_read_all() didn't collect data from |
| 2666 | * overwritable ring buffer. Read again. |
| 2667 | */ |
| 2668 | if (rec->evlist->bkw_mmap_state == BKW_MMAP_RUNNING) |
| 2669 | continue; |
| 2670 | trigger_ready(&switch_output_trigger); |
| 2671 | |
| 2672 | /* |
| 2673 | * Reenable events in overwrite ring buffer after |
| 2674 | * record__mmap_read_all(): we should have collected |
| 2675 | * data from it. |
| 2676 | */ |
| 2677 | evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_RUNNING); |
| 2678 | |
| 2679 | if (!quiet) |
| 2680 | fprintf(stderr, "[ perf record: dump data: Woken up %ld times ]\n", |
| 2681 | record__waking(rec)); |
| 2682 | thread->waking = 0; |
| 2683 | fd = record__switch_output(rec, false); |
| 2684 | if (fd < 0) { |
| 2685 | pr_err("Failed to switch to new file\n"); |
| 2686 | trigger_error(&switch_output_trigger); |
| 2687 | err = fd; |
| 2688 | goto out_child; |
| 2689 | } |
| 2690 | |
| 2691 | /* re-arm the alarm */ |
| 2692 | if (rec->switch_output.time) |
| 2693 | alarm(rec->switch_output.time); |
| 2694 | } |
| 2695 | |
| 2696 | if (hits == thread->samples) { |
| 2697 | if (done || draining) |
| 2698 | break; |
| 2699 | err = fdarray__poll(&thread->pollfd, -1); |
| 2700 | /* |
| 2701 | * Propagate error, only if there's any. Ignore positive |
| 2702 | * number of returned events and interrupt error. |
| 2703 | */ |
| 2704 | if (err > 0 || (err < 0 && errno == EINTR)) |
| 2705 | err = 0; |
| 2706 | thread->waking++; |
| 2707 | |
| 2708 | if (fdarray__filter(&thread->pollfd, POLLERR | POLLHUP, |
| 2709 | record__thread_munmap_filtered, NULL) == 0) |
| 2710 | draining = true; |
| 2711 | |
| 2712 | err = record__update_evlist_pollfd_from_thread(rec, rec->evlist, thread); |
| 2713 | if (err) |
| 2714 | goto out_child; |
| 2715 | } |
| 2716 | |
| 2717 | if (evlist__ctlfd_process(rec->evlist, &cmd) > 0) { |
| 2718 | switch (cmd) { |
| 2719 | case EVLIST_CTL_CMD_SNAPSHOT: |
| 2720 | hit_auxtrace_snapshot_trigger(rec); |
| 2721 | evlist__ctlfd_ack(rec->evlist); |
| 2722 | break; |
| 2723 | case EVLIST_CTL_CMD_STOP: |
| 2724 | done = 1; |
| 2725 | break; |
| 2726 | case EVLIST_CTL_CMD_ACK: |
| 2727 | case EVLIST_CTL_CMD_UNSUPPORTED: |
| 2728 | case EVLIST_CTL_CMD_ENABLE: |
| 2729 | case EVLIST_CTL_CMD_DISABLE: |
| 2730 | case EVLIST_CTL_CMD_EVLIST: |
| 2731 | case EVLIST_CTL_CMD_PING: |
| 2732 | default: |
| 2733 | break; |
| 2734 | } |
| 2735 | } |
| 2736 | |
| 2737 | err = event_enable_timer__process(rec->evlist->eet); |
| 2738 | if (err < 0) |
| 2739 | goto out_child; |
| 2740 | if (err) { |
| 2741 | err = 0; |
| 2742 | done = 1; |
| 2743 | } |
| 2744 | |
| 2745 | /* |
| 2746 | * When perf is starting the traced process, at the end events |
| 2747 | * die with the process and we wait for that. Thus no need to |
| 2748 | * disable events in this case. |
| 2749 | */ |
| 2750 | if (done && !disabled && !target__none(&opts->target)) { |
| 2751 | trigger_off(&auxtrace_snapshot_trigger); |
| 2752 | evlist__disable(rec->evlist); |
| 2753 | disabled = true; |
| 2754 | } |
| 2755 | } |
| 2756 | |
| 2757 | trigger_off(&auxtrace_snapshot_trigger); |
| 2758 | trigger_off(&switch_output_trigger); |
| 2759 | |
| 2760 | if (opts->auxtrace_snapshot_on_exit) |
| 2761 | record__auxtrace_snapshot_exit(rec); |
| 2762 | |
| 2763 | if (forks && workload_exec_errno) { |
| 2764 | char msg[STRERR_BUFSIZE], strevsels[2048]; |
| 2765 | const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg)); |
| 2766 | |
| 2767 | evlist__scnprintf_evsels(rec->evlist, sizeof(strevsels), strevsels); |
| 2768 | |
| 2769 | pr_err("Failed to collect '%s' for the '%s' workload: %s\n", |
| 2770 | strevsels, argv[0], emsg); |
| 2771 | err = -1; |
| 2772 | goto out_child; |
| 2773 | } |
| 2774 | |
| 2775 | if (!quiet) |
| 2776 | fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", |
| 2777 | record__waking(rec)); |
| 2778 | |
| 2779 | write_finished_init(rec, true); |
| 2780 | |
| 2781 | if (target__none(&rec->opts.target)) |
| 2782 | record__synthesize_workload(rec, true); |
| 2783 | |
| 2784 | out_child: |
| 2785 | record__stop_threads(rec); |
| 2786 | record__mmap_read_all(rec, true); |
| 2787 | out_free_threads: |
| 2788 | record__free_thread_data(rec); |
| 2789 | evlist__finalize_ctlfd(rec->evlist); |
| 2790 | record__aio_mmap_read_sync(rec); |
| 2791 | |
| 2792 | if (rec->session->bytes_transferred && rec->session->bytes_compressed) { |
| 2793 | ratio = (float)rec->session->bytes_transferred/(float)rec->session->bytes_compressed; |
| 2794 | session->header.env.comp_ratio = ratio + 0.5; |
| 2795 | } |
| 2796 | |
| 2797 | if (forks) { |
| 2798 | int exit_status; |
| 2799 | |
| 2800 | if (!child_finished) |
| 2801 | kill(rec->evlist->workload.pid, SIGTERM); |
| 2802 | |
| 2803 | wait(&exit_status); |
| 2804 | |
| 2805 | if (err < 0) |
| 2806 | status = err; |
| 2807 | else if (WIFEXITED(exit_status)) |
| 2808 | status = WEXITSTATUS(exit_status); |
| 2809 | else if (WIFSIGNALED(exit_status)) |
| 2810 | signr = WTERMSIG(exit_status); |
| 2811 | } else |
| 2812 | status = err; |
| 2813 | |
| 2814 | if (rec->off_cpu) |
| 2815 | rec->bytes_written += off_cpu_write(rec->session); |
| 2816 | |
| 2817 | record__read_lost_samples(rec); |
| 2818 | record__synthesize(rec, true); |
| 2819 | /* this will be recalculated during process_buildids() */ |
| 2820 | rec->samples = 0; |
| 2821 | |
| 2822 | if (!err) { |
| 2823 | if (!rec->timestamp_filename) { |
| 2824 | record__finish_output(rec); |
| 2825 | } else { |
| 2826 | fd = record__switch_output(rec, true); |
| 2827 | if (fd < 0) { |
| 2828 | status = fd; |
| 2829 | goto out_delete_session; |
| 2830 | } |
| 2831 | } |
| 2832 | } |
| 2833 | |
| 2834 | perf_hooks__invoke_record_end(); |
| 2835 | |
| 2836 | if (!err && !quiet) { |
| 2837 | char samples[128]; |
| 2838 | const char *postfix = rec->timestamp_filename ? |
| 2839 | ".<timestamp>" : ""; |
| 2840 | |
| 2841 | if (rec->samples && !rec->opts.full_auxtrace) |
| 2842 | scnprintf(samples, sizeof(samples), |
| 2843 | " (%" PRIu64 " samples)", rec->samples); |
| 2844 | else |
| 2845 | samples[0] = '\0'; |
| 2846 | |
| 2847 | fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s%s%s", |
| 2848 | perf_data__size(data) / 1024.0 / 1024.0, |
| 2849 | data->path, postfix, samples); |
| 2850 | if (ratio) { |
| 2851 | fprintf(stderr, ", compressed (original %.3f MB, ratio is %.3f)", |
| 2852 | rec->session->bytes_transferred / 1024.0 / 1024.0, |
| 2853 | ratio); |
| 2854 | } |
| 2855 | fprintf(stderr, " ]\n"); |
| 2856 | } |
| 2857 | |
| 2858 | out_delete_session: |
| 2859 | #ifdef HAVE_EVENTFD_SUPPORT |
| 2860 | if (done_fd >= 0) { |
| 2861 | fd = done_fd; |
| 2862 | done_fd = -1; |
| 2863 | |
| 2864 | close(fd); |
| 2865 | } |
| 2866 | #endif |
| 2867 | zstd_fini(&session->zstd_data); |
| 2868 | if (!opts->no_bpf_event) |
| 2869 | evlist__stop_sb_thread(rec->sb_evlist); |
| 2870 | |
| 2871 | perf_session__delete(session); |
| 2872 | return status; |
| 2873 | } |
| 2874 | |
| 2875 | static void callchain_debug(struct callchain_param *callchain) |
| 2876 | { |
| 2877 | static const char *str[CALLCHAIN_MAX] = { "NONE", "FP", "DWARF", "LBR" }; |
| 2878 | |
| 2879 | pr_debug("callchain: type %s\n", str[callchain->record_mode]); |
| 2880 | |
| 2881 | if (callchain->record_mode == CALLCHAIN_DWARF) |
| 2882 | pr_debug("callchain: stack dump size %d\n", |
| 2883 | callchain->dump_size); |
| 2884 | } |
| 2885 | |
| 2886 | int record_opts__parse_callchain(struct record_opts *record, |
| 2887 | struct callchain_param *callchain, |
| 2888 | const char *arg, bool unset) |
| 2889 | { |
| 2890 | int ret; |
| 2891 | callchain->enabled = !unset; |
| 2892 | |
| 2893 | /* --no-call-graph */ |
| 2894 | if (unset) { |
| 2895 | callchain->record_mode = CALLCHAIN_NONE; |
| 2896 | pr_debug("callchain: disabled\n"); |
| 2897 | return 0; |
| 2898 | } |
| 2899 | |
| 2900 | ret = parse_callchain_record_opt(arg, callchain); |
| 2901 | if (!ret) { |
| 2902 | /* Enable data address sampling for DWARF unwind. */ |
| 2903 | if (callchain->record_mode == CALLCHAIN_DWARF) |
| 2904 | record->sample_address = true; |
| 2905 | callchain_debug(callchain); |
| 2906 | } |
| 2907 | |
| 2908 | return ret; |
| 2909 | } |
| 2910 | |
| 2911 | int record_parse_callchain_opt(const struct option *opt, |
| 2912 | const char *arg, |
| 2913 | int unset) |
| 2914 | { |
| 2915 | return record_opts__parse_callchain(opt->value, &callchain_param, arg, unset); |
| 2916 | } |
| 2917 | |
| 2918 | int record_callchain_opt(const struct option *opt, |
| 2919 | const char *arg __maybe_unused, |
| 2920 | int unset __maybe_unused) |
| 2921 | { |
| 2922 | struct callchain_param *callchain = opt->value; |
| 2923 | |
| 2924 | callchain->enabled = true; |
| 2925 | |
| 2926 | if (callchain->record_mode == CALLCHAIN_NONE) |
| 2927 | callchain->record_mode = CALLCHAIN_FP; |
| 2928 | |
| 2929 | callchain_debug(callchain); |
| 2930 | return 0; |
| 2931 | } |
| 2932 | |
| 2933 | static int perf_record_config(const char *var, const char *value, void *cb) |
| 2934 | { |
| 2935 | struct record *rec = cb; |
| 2936 | |
| 2937 | if (!strcmp(var, "record.build-id")) { |
| 2938 | if (!strcmp(value, "cache")) |
| 2939 | rec->no_buildid_cache = false; |
| 2940 | else if (!strcmp(value, "no-cache")) |
| 2941 | rec->no_buildid_cache = true; |
| 2942 | else if (!strcmp(value, "skip")) |
| 2943 | rec->no_buildid = true; |
| 2944 | else if (!strcmp(value, "mmap")) |
| 2945 | rec->buildid_mmap = true; |
| 2946 | else |
| 2947 | return -1; |
| 2948 | return 0; |
| 2949 | } |
| 2950 | if (!strcmp(var, "record.call-graph")) { |
| 2951 | var = "call-graph.record-mode"; |
| 2952 | return perf_default_config(var, value, cb); |
| 2953 | } |
| 2954 | #ifdef HAVE_AIO_SUPPORT |
| 2955 | if (!strcmp(var, "record.aio")) { |
| 2956 | rec->opts.nr_cblocks = strtol(value, NULL, 0); |
| 2957 | if (!rec->opts.nr_cblocks) |
| 2958 | rec->opts.nr_cblocks = nr_cblocks_default; |
| 2959 | } |
| 2960 | #endif |
| 2961 | if (!strcmp(var, "record.debuginfod")) { |
| 2962 | rec->debuginfod.urls = strdup(value); |
| 2963 | if (!rec->debuginfod.urls) |
| 2964 | return -ENOMEM; |
| 2965 | rec->debuginfod.set = true; |
| 2966 | } |
| 2967 | |
| 2968 | return 0; |
| 2969 | } |
| 2970 | |
| 2971 | static int record__parse_event_enable_time(const struct option *opt, const char *str, int unset) |
| 2972 | { |
| 2973 | struct record *rec = (struct record *)opt->value; |
| 2974 | |
| 2975 | return evlist__parse_event_enable_time(rec->evlist, &rec->opts, str, unset); |
| 2976 | } |
| 2977 | |
| 2978 | static int record__parse_affinity(const struct option *opt, const char *str, int unset) |
| 2979 | { |
| 2980 | struct record_opts *opts = (struct record_opts *)opt->value; |
| 2981 | |
| 2982 | if (unset || !str) |
| 2983 | return 0; |
| 2984 | |
| 2985 | if (!strcasecmp(str, "node")) |
| 2986 | opts->affinity = PERF_AFFINITY_NODE; |
| 2987 | else if (!strcasecmp(str, "cpu")) |
| 2988 | opts->affinity = PERF_AFFINITY_CPU; |
| 2989 | |
| 2990 | return 0; |
| 2991 | } |
| 2992 | |
| 2993 | static int record__mmap_cpu_mask_alloc(struct mmap_cpu_mask *mask, int nr_bits) |
| 2994 | { |
| 2995 | mask->nbits = nr_bits; |
| 2996 | mask->bits = bitmap_zalloc(mask->nbits); |
| 2997 | if (!mask->bits) |
| 2998 | return -ENOMEM; |
| 2999 | |
| 3000 | return 0; |
| 3001 | } |
| 3002 | |
| 3003 | static void record__mmap_cpu_mask_free(struct mmap_cpu_mask *mask) |
| 3004 | { |
| 3005 | bitmap_free(mask->bits); |
| 3006 | mask->nbits = 0; |
| 3007 | } |
| 3008 | |
| 3009 | static int record__thread_mask_alloc(struct thread_mask *mask, int nr_bits) |
| 3010 | { |
| 3011 | int ret; |
| 3012 | |
| 3013 | ret = record__mmap_cpu_mask_alloc(&mask->maps, nr_bits); |
| 3014 | if (ret) { |
| 3015 | mask->affinity.bits = NULL; |
| 3016 | return ret; |
| 3017 | } |
| 3018 | |
| 3019 | ret = record__mmap_cpu_mask_alloc(&mask->affinity, nr_bits); |
| 3020 | if (ret) { |
| 3021 | record__mmap_cpu_mask_free(&mask->maps); |
| 3022 | mask->maps.bits = NULL; |
| 3023 | } |
| 3024 | |
| 3025 | return ret; |
| 3026 | } |
| 3027 | |
| 3028 | static void record__thread_mask_free(struct thread_mask *mask) |
| 3029 | { |
| 3030 | record__mmap_cpu_mask_free(&mask->maps); |
| 3031 | record__mmap_cpu_mask_free(&mask->affinity); |
| 3032 | } |
| 3033 | |
| 3034 | static int record__parse_threads(const struct option *opt, const char *str, int unset) |
| 3035 | { |
| 3036 | int s; |
| 3037 | struct record_opts *opts = opt->value; |
| 3038 | |
| 3039 | if (unset || !str || !strlen(str)) { |
| 3040 | opts->threads_spec = THREAD_SPEC__CPU; |
| 3041 | } else { |
| 3042 | for (s = 1; s < THREAD_SPEC__MAX; s++) { |
| 3043 | if (s == THREAD_SPEC__USER) { |
| 3044 | opts->threads_user_spec = strdup(str); |
| 3045 | if (!opts->threads_user_spec) |
| 3046 | return -ENOMEM; |
| 3047 | opts->threads_spec = THREAD_SPEC__USER; |
| 3048 | break; |
| 3049 | } |
| 3050 | if (!strncasecmp(str, thread_spec_tags[s], strlen(thread_spec_tags[s]))) { |
| 3051 | opts->threads_spec = s; |
| 3052 | break; |
| 3053 | } |
| 3054 | } |
| 3055 | } |
| 3056 | |
| 3057 | if (opts->threads_spec == THREAD_SPEC__USER) |
| 3058 | pr_debug("threads_spec: %s\n", opts->threads_user_spec); |
| 3059 | else |
| 3060 | pr_debug("threads_spec: %s\n", thread_spec_tags[opts->threads_spec]); |
| 3061 | |
| 3062 | return 0; |
| 3063 | } |
| 3064 | |
| 3065 | static int parse_output_max_size(const struct option *opt, |
| 3066 | const char *str, int unset) |
| 3067 | { |
| 3068 | unsigned long *s = (unsigned long *)opt->value; |
| 3069 | static struct parse_tag tags_size[] = { |
| 3070 | { .tag = 'B', .mult = 1 }, |
| 3071 | { .tag = 'K', .mult = 1 << 10 }, |
| 3072 | { .tag = 'M', .mult = 1 << 20 }, |
| 3073 | { .tag = 'G', .mult = 1 << 30 }, |
| 3074 | { .tag = 0 }, |
| 3075 | }; |
| 3076 | unsigned long val; |
| 3077 | |
| 3078 | if (unset) { |
| 3079 | *s = 0; |
| 3080 | return 0; |
| 3081 | } |
| 3082 | |
| 3083 | val = parse_tag_value(str, tags_size); |
| 3084 | if (val != (unsigned long) -1) { |
| 3085 | *s = val; |
| 3086 | return 0; |
| 3087 | } |
| 3088 | |
| 3089 | return -1; |
| 3090 | } |
| 3091 | |
| 3092 | static int record__parse_mmap_pages(const struct option *opt, |
| 3093 | const char *str, |
| 3094 | int unset __maybe_unused) |
| 3095 | { |
| 3096 | struct record_opts *opts = opt->value; |
| 3097 | char *s, *p; |
| 3098 | unsigned int mmap_pages; |
| 3099 | int ret; |
| 3100 | |
| 3101 | if (!str) |
| 3102 | return -EINVAL; |
| 3103 | |
| 3104 | s = strdup(str); |
| 3105 | if (!s) |
| 3106 | return -ENOMEM; |
| 3107 | |
| 3108 | p = strchr(s, ','); |
| 3109 | if (p) |
| 3110 | *p = '\0'; |
| 3111 | |
| 3112 | if (*s) { |
| 3113 | ret = __evlist__parse_mmap_pages(&mmap_pages, s); |
| 3114 | if (ret) |
| 3115 | goto out_free; |
| 3116 | opts->mmap_pages = mmap_pages; |
| 3117 | } |
| 3118 | |
| 3119 | if (!p) { |
| 3120 | ret = 0; |
| 3121 | goto out_free; |
| 3122 | } |
| 3123 | |
| 3124 | ret = __evlist__parse_mmap_pages(&mmap_pages, p + 1); |
| 3125 | if (ret) |
| 3126 | goto out_free; |
| 3127 | |
| 3128 | opts->auxtrace_mmap_pages = mmap_pages; |
| 3129 | |
| 3130 | out_free: |
| 3131 | free(s); |
| 3132 | return ret; |
| 3133 | } |
| 3134 | |
| 3135 | void __weak arch__add_leaf_frame_record_opts(struct record_opts *opts __maybe_unused) |
| 3136 | { |
| 3137 | } |
| 3138 | |
| 3139 | static int parse_control_option(const struct option *opt, |
| 3140 | const char *str, |
| 3141 | int unset __maybe_unused) |
| 3142 | { |
| 3143 | struct record_opts *opts = opt->value; |
| 3144 | |
| 3145 | return evlist__parse_control(str, &opts->ctl_fd, &opts->ctl_fd_ack, &opts->ctl_fd_close); |
| 3146 | } |
| 3147 | |
| 3148 | static void switch_output_size_warn(struct record *rec) |
| 3149 | { |
| 3150 | u64 wakeup_size = evlist__mmap_size(rec->opts.mmap_pages); |
| 3151 | struct switch_output *s = &rec->switch_output; |
| 3152 | |
| 3153 | wakeup_size /= 2; |
| 3154 | |
| 3155 | if (s->size < wakeup_size) { |
| 3156 | char buf[100]; |
| 3157 | |
| 3158 | unit_number__scnprintf(buf, sizeof(buf), wakeup_size); |
| 3159 | pr_warning("WARNING: switch-output data size lower than " |
| 3160 | "wakeup kernel buffer size (%s) " |
| 3161 | "expect bigger perf.data sizes\n", buf); |
| 3162 | } |
| 3163 | } |
| 3164 | |
| 3165 | static int switch_output_setup(struct record *rec) |
| 3166 | { |
| 3167 | struct switch_output *s = &rec->switch_output; |
| 3168 | static struct parse_tag tags_size[] = { |
| 3169 | { .tag = 'B', .mult = 1 }, |
| 3170 | { .tag = 'K', .mult = 1 << 10 }, |
| 3171 | { .tag = 'M', .mult = 1 << 20 }, |
| 3172 | { .tag = 'G', .mult = 1 << 30 }, |
| 3173 | { .tag = 0 }, |
| 3174 | }; |
| 3175 | static struct parse_tag tags_time[] = { |
| 3176 | { .tag = 's', .mult = 1 }, |
| 3177 | { .tag = 'm', .mult = 60 }, |
| 3178 | { .tag = 'h', .mult = 60*60 }, |
| 3179 | { .tag = 'd', .mult = 60*60*24 }, |
| 3180 | { .tag = 0 }, |
| 3181 | }; |
| 3182 | unsigned long val; |
| 3183 | |
| 3184 | /* |
| 3185 | * If we're using --switch-output-events, then we imply its |
| 3186 | * --switch-output=signal, as we'll send a SIGUSR2 from the side band |
| 3187 | * thread to its parent. |
| 3188 | */ |
| 3189 | if (rec->switch_output_event_set) { |
| 3190 | if (record__threads_enabled(rec)) { |
| 3191 | pr_warning("WARNING: --switch-output-event option is not available in parallel streaming mode.\n"); |
| 3192 | return 0; |
| 3193 | } |
| 3194 | goto do_signal; |
| 3195 | } |
| 3196 | |
| 3197 | if (!s->set) |
| 3198 | return 0; |
| 3199 | |
| 3200 | if (record__threads_enabled(rec)) { |
| 3201 | pr_warning("WARNING: --switch-output option is not available in parallel streaming mode.\n"); |
| 3202 | return 0; |
| 3203 | } |
| 3204 | |
| 3205 | if (!strcmp(s->str, "signal")) { |
| 3206 | do_signal: |
| 3207 | s->signal = true; |
| 3208 | pr_debug("switch-output with SIGUSR2 signal\n"); |
| 3209 | goto enabled; |
| 3210 | } |
| 3211 | |
| 3212 | val = parse_tag_value(s->str, tags_size); |
| 3213 | if (val != (unsigned long) -1) { |
| 3214 | s->size = val; |
| 3215 | pr_debug("switch-output with %s size threshold\n", s->str); |
| 3216 | goto enabled; |
| 3217 | } |
| 3218 | |
| 3219 | val = parse_tag_value(s->str, tags_time); |
| 3220 | if (val != (unsigned long) -1) { |
| 3221 | s->time = val; |
| 3222 | pr_debug("switch-output with %s time threshold (%lu seconds)\n", |
| 3223 | s->str, s->time); |
| 3224 | goto enabled; |
| 3225 | } |
| 3226 | |
| 3227 | return -1; |
| 3228 | |
| 3229 | enabled: |
| 3230 | rec->timestamp_filename = true; |
| 3231 | s->enabled = true; |
| 3232 | |
| 3233 | if (s->size && !rec->opts.no_buffering) |
| 3234 | switch_output_size_warn(rec); |
| 3235 | |
| 3236 | return 0; |
| 3237 | } |
| 3238 | |
| 3239 | static const char * const __record_usage[] = { |
| 3240 | "perf record [<options>] [<command>]", |
| 3241 | "perf record [<options>] -- <command> [<options>]", |
| 3242 | NULL |
| 3243 | }; |
| 3244 | const char * const *record_usage = __record_usage; |
| 3245 | |
| 3246 | static int build_id__process_mmap(struct perf_tool *tool, union perf_event *event, |
| 3247 | struct perf_sample *sample, struct machine *machine) |
| 3248 | { |
| 3249 | /* |
| 3250 | * We already have the kernel maps, put in place via perf_session__create_kernel_maps() |
| 3251 | * no need to add them twice. |
| 3252 | */ |
| 3253 | if (!(event->header.misc & PERF_RECORD_MISC_USER)) |
| 3254 | return 0; |
| 3255 | return perf_event__process_mmap(tool, event, sample, machine); |
| 3256 | } |
| 3257 | |
| 3258 | static int build_id__process_mmap2(struct perf_tool *tool, union perf_event *event, |
| 3259 | struct perf_sample *sample, struct machine *machine) |
| 3260 | { |
| 3261 | /* |
| 3262 | * We already have the kernel maps, put in place via perf_session__create_kernel_maps() |
| 3263 | * no need to add them twice. |
| 3264 | */ |
| 3265 | if (!(event->header.misc & PERF_RECORD_MISC_USER)) |
| 3266 | return 0; |
| 3267 | |
| 3268 | return perf_event__process_mmap2(tool, event, sample, machine); |
| 3269 | } |
| 3270 | |
| 3271 | static int process_timestamp_boundary(struct perf_tool *tool, |
| 3272 | union perf_event *event __maybe_unused, |
| 3273 | struct perf_sample *sample, |
| 3274 | struct machine *machine __maybe_unused) |
| 3275 | { |
| 3276 | struct record *rec = container_of(tool, struct record, tool); |
| 3277 | |
| 3278 | set_timestamp_boundary(rec, sample->time); |
| 3279 | return 0; |
| 3280 | } |
| 3281 | |
| 3282 | static int parse_record_synth_option(const struct option *opt, |
| 3283 | const char *str, |
| 3284 | int unset __maybe_unused) |
| 3285 | { |
| 3286 | struct record_opts *opts = opt->value; |
| 3287 | char *p = strdup(str); |
| 3288 | |
| 3289 | if (p == NULL) |
| 3290 | return -1; |
| 3291 | |
| 3292 | opts->synth = parse_synth_opt(p); |
| 3293 | free(p); |
| 3294 | |
| 3295 | if (opts->synth < 0) { |
| 3296 | pr_err("Invalid synth option: %s\n", str); |
| 3297 | return -1; |
| 3298 | } |
| 3299 | return 0; |
| 3300 | } |
| 3301 | |
| 3302 | /* |
| 3303 | * XXX Ideally would be local to cmd_record() and passed to a record__new |
| 3304 | * because we need to have access to it in record__exit, that is called |
| 3305 | * after cmd_record() exits, but since record_options need to be accessible to |
| 3306 | * builtin-script, leave it here. |
| 3307 | * |
| 3308 | * At least we don't ouch it in all the other functions here directly. |
| 3309 | * |
| 3310 | * Just say no to tons of global variables, sigh. |
| 3311 | */ |
| 3312 | static struct record record = { |
| 3313 | .opts = { |
| 3314 | .sample_time = true, |
| 3315 | .mmap_pages = UINT_MAX, |
| 3316 | .user_freq = UINT_MAX, |
| 3317 | .user_interval = ULLONG_MAX, |
| 3318 | .freq = 4000, |
| 3319 | .target = { |
| 3320 | .uses_mmap = true, |
| 3321 | .default_per_cpu = true, |
| 3322 | }, |
| 3323 | .mmap_flush = MMAP_FLUSH_DEFAULT, |
| 3324 | .nr_threads_synthesize = 1, |
| 3325 | .ctl_fd = -1, |
| 3326 | .ctl_fd_ack = -1, |
| 3327 | .synth = PERF_SYNTH_ALL, |
| 3328 | }, |
| 3329 | .tool = { |
| 3330 | .sample = process_sample_event, |
| 3331 | .fork = perf_event__process_fork, |
| 3332 | .exit = perf_event__process_exit, |
| 3333 | .comm = perf_event__process_comm, |
| 3334 | .namespaces = perf_event__process_namespaces, |
| 3335 | .mmap = build_id__process_mmap, |
| 3336 | .mmap2 = build_id__process_mmap2, |
| 3337 | .itrace_start = process_timestamp_boundary, |
| 3338 | .aux = process_timestamp_boundary, |
| 3339 | .ordered_events = true, |
| 3340 | }, |
| 3341 | }; |
| 3342 | |
| 3343 | const char record_callchain_help[] = CALLCHAIN_RECORD_HELP |
| 3344 | "\n\t\t\t\tDefault: fp"; |
| 3345 | |
| 3346 | static bool dry_run; |
| 3347 | |
| 3348 | static struct parse_events_option_args parse_events_option_args = { |
| 3349 | .evlistp = &record.evlist, |
| 3350 | }; |
| 3351 | |
| 3352 | static struct parse_events_option_args switch_output_parse_events_option_args = { |
| 3353 | .evlistp = &record.sb_evlist, |
| 3354 | }; |
| 3355 | |
| 3356 | /* |
| 3357 | * XXX Will stay a global variable till we fix builtin-script.c to stop messing |
| 3358 | * with it and switch to use the library functions in perf_evlist that came |
| 3359 | * from builtin-record.c, i.e. use record_opts, |
| 3360 | * evlist__prepare_workload, etc instead of fork+exec'in 'perf record', |
| 3361 | * using pipes, etc. |
| 3362 | */ |
| 3363 | static struct option __record_options[] = { |
| 3364 | OPT_CALLBACK('e', "event", &parse_events_option_args, "event", |
| 3365 | "event selector. use 'perf list' to list available events", |
| 3366 | parse_events_option), |
| 3367 | OPT_CALLBACK(0, "filter", &record.evlist, "filter", |
| 3368 | "event filter", parse_filter), |
| 3369 | OPT_CALLBACK_NOOPT(0, "exclude-perf", &record.evlist, |
| 3370 | NULL, "don't record events from perf itself", |
| 3371 | exclude_perf), |
| 3372 | OPT_STRING('p', "pid", &record.opts.target.pid, "pid", |
| 3373 | "record events on existing process id"), |
| 3374 | OPT_STRING('t', "tid", &record.opts.target.tid, "tid", |
| 3375 | "record events on existing thread id"), |
| 3376 | OPT_INTEGER('r', "realtime", &record.realtime_prio, |
| 3377 | "collect data with this RT SCHED_FIFO priority"), |
| 3378 | OPT_BOOLEAN(0, "no-buffering", &record.opts.no_buffering, |
| 3379 | "collect data without buffering"), |
| 3380 | OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples, |
| 3381 | "collect raw sample records from all opened counters"), |
| 3382 | OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide, |
| 3383 | "system-wide collection from all CPUs"), |
| 3384 | OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu", |
| 3385 | "list of cpus to monitor"), |
| 3386 | OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"), |
| 3387 | OPT_STRING('o', "output", &record.data.path, "file", |
| 3388 | "output file name"), |
| 3389 | OPT_BOOLEAN_SET('i', "no-inherit", &record.opts.no_inherit, |
| 3390 | &record.opts.no_inherit_set, |
| 3391 | "child tasks do not inherit counters"), |
| 3392 | OPT_BOOLEAN(0, "tail-synthesize", &record.opts.tail_synthesize, |
| 3393 | "synthesize non-sample events at the end of output"), |
| 3394 | OPT_BOOLEAN(0, "overwrite", &record.opts.overwrite, "use overwrite mode"), |
| 3395 | OPT_BOOLEAN(0, "no-bpf-event", &record.opts.no_bpf_event, "do not record bpf events"), |
| 3396 | OPT_BOOLEAN(0, "strict-freq", &record.opts.strict_freq, |
| 3397 | "Fail if the specified frequency can't be used"), |
| 3398 | OPT_CALLBACK('F', "freq", &record.opts, "freq or 'max'", |
| 3399 | "profile at this frequency", |
| 3400 | record__parse_freq), |
| 3401 | OPT_CALLBACK('m', "mmap-pages", &record.opts, "pages[,pages]", |
| 3402 | "number of mmap data pages and AUX area tracing mmap pages", |
| 3403 | record__parse_mmap_pages), |
| 3404 | OPT_CALLBACK(0, "mmap-flush", &record.opts, "number", |
| 3405 | "Minimal number of bytes that is extracted from mmap data pages (default: 1)", |
| 3406 | record__mmap_flush_parse), |
| 3407 | OPT_CALLBACK_NOOPT('g', NULL, &callchain_param, |
| 3408 | NULL, "enables call-graph recording" , |
| 3409 | &record_callchain_opt), |
| 3410 | OPT_CALLBACK(0, "call-graph", &record.opts, |
| 3411 | "record_mode[,record_size]", record_callchain_help, |
| 3412 | &record_parse_callchain_opt), |
| 3413 | OPT_INCR('v', "verbose", &verbose, |
| 3414 | "be more verbose (show counter open errors, etc)"), |
| 3415 | OPT_BOOLEAN('q', "quiet", &quiet, "don't print any warnings or messages"), |
| 3416 | OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat, |
| 3417 | "per thread counts"), |
| 3418 | OPT_BOOLEAN('d', "data", &record.opts.sample_address, "Record the sample addresses"), |
| 3419 | OPT_BOOLEAN(0, "phys-data", &record.opts.sample_phys_addr, |
| 3420 | "Record the sample physical addresses"), |
| 3421 | OPT_BOOLEAN(0, "data-page-size", &record.opts.sample_data_page_size, |
| 3422 | "Record the sampled data address data page size"), |
| 3423 | OPT_BOOLEAN(0, "code-page-size", &record.opts.sample_code_page_size, |
| 3424 | "Record the sampled code address (ip) page size"), |
| 3425 | OPT_BOOLEAN(0, "sample-cpu", &record.opts.sample_cpu, "Record the sample cpu"), |
| 3426 | OPT_BOOLEAN(0, "sample-identifier", &record.opts.sample_identifier, |
| 3427 | "Record the sample identifier"), |
| 3428 | OPT_BOOLEAN_SET('T', "timestamp", &record.opts.sample_time, |
| 3429 | &record.opts.sample_time_set, |
| 3430 | "Record the sample timestamps"), |
| 3431 | OPT_BOOLEAN_SET('P', "period", &record.opts.period, &record.opts.period_set, |
| 3432 | "Record the sample period"), |
| 3433 | OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples, |
| 3434 | "don't sample"), |
| 3435 | OPT_BOOLEAN_SET('N', "no-buildid-cache", &record.no_buildid_cache, |
| 3436 | &record.no_buildid_cache_set, |
| 3437 | "do not update the buildid cache"), |
| 3438 | OPT_BOOLEAN_SET('B', "no-buildid", &record.no_buildid, |
| 3439 | &record.no_buildid_set, |
| 3440 | "do not collect buildids in perf.data"), |
| 3441 | OPT_CALLBACK('G', "cgroup", &record.evlist, "name", |
| 3442 | "monitor event in cgroup name only", |
| 3443 | parse_cgroups), |
| 3444 | OPT_CALLBACK('D', "delay", &record, "ms", |
| 3445 | "ms to wait before starting measurement after program start (-1: start with events disabled), " |
| 3446 | "or ranges of time to enable events e.g. '-D 10-20,30-40'", |
| 3447 | record__parse_event_enable_time), |
| 3448 | OPT_BOOLEAN(0, "kcore", &record.opts.kcore, "copy /proc/kcore"), |
| 3449 | OPT_STRING('u', "uid", &record.opts.target.uid_str, "user", |
| 3450 | "user to profile"), |
| 3451 | |
| 3452 | OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack, |
| 3453 | "branch any", "sample any taken branches", |
| 3454 | parse_branch_stack), |
| 3455 | |
| 3456 | OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack, |
| 3457 | "branch filter mask", "branch stack filter modes", |
| 3458 | parse_branch_stack), |
| 3459 | OPT_BOOLEAN('W', "weight", &record.opts.sample_weight, |
| 3460 | "sample by weight (on special events only)"), |
| 3461 | OPT_BOOLEAN(0, "transaction", &record.opts.sample_transaction, |
| 3462 | "sample transaction flags (special events only)"), |
| 3463 | OPT_BOOLEAN(0, "per-thread", &record.opts.target.per_thread, |
| 3464 | "use per-thread mmaps"), |
| 3465 | OPT_CALLBACK_OPTARG('I', "intr-regs", &record.opts.sample_intr_regs, NULL, "any register", |
| 3466 | "sample selected machine registers on interrupt," |
| 3467 | " use '-I?' to list register names", parse_intr_regs), |
| 3468 | OPT_CALLBACK_OPTARG(0, "user-regs", &record.opts.sample_user_regs, NULL, "any register", |
| 3469 | "sample selected machine registers on interrupt," |
| 3470 | " use '--user-regs=?' to list register names", parse_user_regs), |
| 3471 | OPT_BOOLEAN(0, "running-time", &record.opts.running_time, |
| 3472 | "Record running/enabled time of read (:S) events"), |
| 3473 | OPT_CALLBACK('k', "clockid", &record.opts, |
| 3474 | "clockid", "clockid to use for events, see clock_gettime()", |
| 3475 | parse_clockid), |
| 3476 | OPT_STRING_OPTARG('S', "snapshot", &record.opts.auxtrace_snapshot_opts, |
| 3477 | "opts", "AUX area tracing Snapshot Mode", ""), |
| 3478 | OPT_STRING_OPTARG(0, "aux-sample", &record.opts.auxtrace_sample_opts, |
| 3479 | "opts", "sample AUX area", ""), |
| 3480 | OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, |
| 3481 | "per thread proc mmap processing timeout in ms"), |
| 3482 | OPT_BOOLEAN(0, "namespaces", &record.opts.record_namespaces, |
| 3483 | "Record namespaces events"), |
| 3484 | OPT_BOOLEAN(0, "all-cgroups", &record.opts.record_cgroup, |
| 3485 | "Record cgroup events"), |
| 3486 | OPT_BOOLEAN_SET(0, "switch-events", &record.opts.record_switch_events, |
| 3487 | &record.opts.record_switch_events_set, |
| 3488 | "Record context switch events"), |
| 3489 | OPT_BOOLEAN_FLAG(0, "all-kernel", &record.opts.all_kernel, |
| 3490 | "Configure all used events to run in kernel space.", |
| 3491 | PARSE_OPT_EXCLUSIVE), |
| 3492 | OPT_BOOLEAN_FLAG(0, "all-user", &record.opts.all_user, |
| 3493 | "Configure all used events to run in user space.", |
| 3494 | PARSE_OPT_EXCLUSIVE), |
| 3495 | OPT_BOOLEAN(0, "kernel-callchains", &record.opts.kernel_callchains, |
| 3496 | "collect kernel callchains"), |
| 3497 | OPT_BOOLEAN(0, "user-callchains", &record.opts.user_callchains, |
| 3498 | "collect user callchains"), |
| 3499 | OPT_STRING(0, "vmlinux", &symbol_conf.vmlinux_name, |
| 3500 | "file", "vmlinux pathname"), |
| 3501 | OPT_BOOLEAN(0, "buildid-all", &record.buildid_all, |
| 3502 | "Record build-id of all DSOs regardless of hits"), |
| 3503 | OPT_BOOLEAN(0, "buildid-mmap", &record.buildid_mmap, |
| 3504 | "Record build-id in map events"), |
| 3505 | OPT_BOOLEAN(0, "timestamp-filename", &record.timestamp_filename, |
| 3506 | "append timestamp to output filename"), |
| 3507 | OPT_BOOLEAN(0, "timestamp-boundary", &record.timestamp_boundary, |
| 3508 | "Record timestamp boundary (time of first/last samples)"), |
| 3509 | OPT_STRING_OPTARG_SET(0, "switch-output", &record.switch_output.str, |
| 3510 | &record.switch_output.set, "signal or size[BKMG] or time[smhd]", |
| 3511 | "Switch output when receiving SIGUSR2 (signal) or cross a size or time threshold", |
| 3512 | "signal"), |
| 3513 | OPT_CALLBACK_SET(0, "switch-output-event", &switch_output_parse_events_option_args, |
| 3514 | &record.switch_output_event_set, "switch output event", |
| 3515 | "switch output event selector. use 'perf list' to list available events", |
| 3516 | parse_events_option_new_evlist), |
| 3517 | OPT_INTEGER(0, "switch-max-files", &record.switch_output.num_files, |
| 3518 | "Limit number of switch output generated files"), |
| 3519 | OPT_BOOLEAN(0, "dry-run", &dry_run, |
| 3520 | "Parse options then exit"), |
| 3521 | #ifdef HAVE_AIO_SUPPORT |
| 3522 | OPT_CALLBACK_OPTARG(0, "aio", &record.opts, |
| 3523 | &nr_cblocks_default, "n", "Use <n> control blocks in asynchronous trace writing mode (default: 1, max: 4)", |
| 3524 | record__aio_parse), |
| 3525 | #endif |
| 3526 | OPT_CALLBACK(0, "affinity", &record.opts, "node|cpu", |
| 3527 | "Set affinity mask of trace reading thread to NUMA node cpu mask or cpu of processed mmap buffer", |
| 3528 | record__parse_affinity), |
| 3529 | #ifdef HAVE_ZSTD_SUPPORT |
| 3530 | OPT_CALLBACK_OPTARG('z', "compression-level", &record.opts, &comp_level_default, "n", |
| 3531 | "Compress records using specified level (default: 1 - fastest compression, 22 - greatest compression)", |
| 3532 | record__parse_comp_level), |
| 3533 | #endif |
| 3534 | OPT_CALLBACK(0, "max-size", &record.output_max_size, |
| 3535 | "size", "Limit the maximum size of the output file", parse_output_max_size), |
| 3536 | OPT_UINTEGER(0, "num-thread-synthesize", |
| 3537 | &record.opts.nr_threads_synthesize, |
| 3538 | "number of threads to run for event synthesis"), |
| 3539 | #ifdef HAVE_LIBPFM |
| 3540 | OPT_CALLBACK(0, "pfm-events", &record.evlist, "event", |
| 3541 | "libpfm4 event selector. use 'perf list' to list available events", |
| 3542 | parse_libpfm_events_option), |
| 3543 | #endif |
| 3544 | OPT_CALLBACK(0, "control", &record.opts, "fd:ctl-fd[,ack-fd] or fifo:ctl-fifo[,ack-fifo]", |
| 3545 | "Listen on ctl-fd descriptor for command to control measurement ('enable': enable events, 'disable': disable events,\n" |
| 3546 | "\t\t\t 'snapshot': AUX area tracing snapshot).\n" |
| 3547 | "\t\t\t Optionally send control command completion ('ack\\n') to ack-fd descriptor.\n" |
| 3548 | "\t\t\t Alternatively, ctl-fifo / ack-fifo will be opened and used as ctl-fd / ack-fd.", |
| 3549 | parse_control_option), |
| 3550 | OPT_CALLBACK(0, "synth", &record.opts, "no|all|task|mmap|cgroup", |
| 3551 | "Fine-tune event synthesis: default=all", parse_record_synth_option), |
| 3552 | OPT_STRING_OPTARG_SET(0, "debuginfod", &record.debuginfod.urls, |
| 3553 | &record.debuginfod.set, "debuginfod urls", |
| 3554 | "Enable debuginfod data retrieval from DEBUGINFOD_URLS or specified urls", |
| 3555 | "system"), |
| 3556 | OPT_CALLBACK_OPTARG(0, "threads", &record.opts, NULL, "spec", |
| 3557 | "write collected trace data into several data files using parallel threads", |
| 3558 | record__parse_threads), |
| 3559 | OPT_BOOLEAN(0, "off-cpu", &record.off_cpu, "Enable off-cpu analysis"), |
| 3560 | OPT_END() |
| 3561 | }; |
| 3562 | |
| 3563 | struct option *record_options = __record_options; |
| 3564 | |
| 3565 | static int record__mmap_cpu_mask_init(struct mmap_cpu_mask *mask, struct perf_cpu_map *cpus) |
| 3566 | { |
| 3567 | struct perf_cpu cpu; |
| 3568 | int idx; |
| 3569 | |
| 3570 | if (cpu_map__is_dummy(cpus)) |
| 3571 | return 0; |
| 3572 | |
| 3573 | perf_cpu_map__for_each_cpu_skip_any(cpu, idx, cpus) { |
| 3574 | /* Return ENODEV is input cpu is greater than max cpu */ |
| 3575 | if ((unsigned long)cpu.cpu > mask->nbits) |
| 3576 | return -ENODEV; |
| 3577 | __set_bit(cpu.cpu, mask->bits); |
| 3578 | } |
| 3579 | |
| 3580 | return 0; |
| 3581 | } |
| 3582 | |
| 3583 | static int record__mmap_cpu_mask_init_spec(struct mmap_cpu_mask *mask, const char *mask_spec) |
| 3584 | { |
| 3585 | struct perf_cpu_map *cpus; |
| 3586 | |
| 3587 | cpus = perf_cpu_map__new(mask_spec); |
| 3588 | if (!cpus) |
| 3589 | return -ENOMEM; |
| 3590 | |
| 3591 | bitmap_zero(mask->bits, mask->nbits); |
| 3592 | if (record__mmap_cpu_mask_init(mask, cpus)) |
| 3593 | return -ENODEV; |
| 3594 | |
| 3595 | perf_cpu_map__put(cpus); |
| 3596 | |
| 3597 | return 0; |
| 3598 | } |
| 3599 | |
| 3600 | static void record__free_thread_masks(struct record *rec, int nr_threads) |
| 3601 | { |
| 3602 | int t; |
| 3603 | |
| 3604 | if (rec->thread_masks) |
| 3605 | for (t = 0; t < nr_threads; t++) |
| 3606 | record__thread_mask_free(&rec->thread_masks[t]); |
| 3607 | |
| 3608 | zfree(&rec->thread_masks); |
| 3609 | } |
| 3610 | |
| 3611 | static int record__alloc_thread_masks(struct record *rec, int nr_threads, int nr_bits) |
| 3612 | { |
| 3613 | int t, ret; |
| 3614 | |
| 3615 | rec->thread_masks = zalloc(nr_threads * sizeof(*(rec->thread_masks))); |
| 3616 | if (!rec->thread_masks) { |
| 3617 | pr_err("Failed to allocate thread masks\n"); |
| 3618 | return -ENOMEM; |
| 3619 | } |
| 3620 | |
| 3621 | for (t = 0; t < nr_threads; t++) { |
| 3622 | ret = record__thread_mask_alloc(&rec->thread_masks[t], nr_bits); |
| 3623 | if (ret) { |
| 3624 | pr_err("Failed to allocate thread masks[%d]\n", t); |
| 3625 | goto out_free; |
| 3626 | } |
| 3627 | } |
| 3628 | |
| 3629 | return 0; |
| 3630 | |
| 3631 | out_free: |
| 3632 | record__free_thread_masks(rec, nr_threads); |
| 3633 | |
| 3634 | return ret; |
| 3635 | } |
| 3636 | |
| 3637 | static int record__init_thread_cpu_masks(struct record *rec, struct perf_cpu_map *cpus) |
| 3638 | { |
| 3639 | int t, ret, nr_cpus = perf_cpu_map__nr(cpus); |
| 3640 | |
| 3641 | ret = record__alloc_thread_masks(rec, nr_cpus, cpu__max_cpu().cpu); |
| 3642 | if (ret) |
| 3643 | return ret; |
| 3644 | |
| 3645 | rec->nr_threads = nr_cpus; |
| 3646 | pr_debug("nr_threads: %d\n", rec->nr_threads); |
| 3647 | |
| 3648 | for (t = 0; t < rec->nr_threads; t++) { |
| 3649 | __set_bit(perf_cpu_map__cpu(cpus, t).cpu, rec->thread_masks[t].maps.bits); |
| 3650 | __set_bit(perf_cpu_map__cpu(cpus, t).cpu, rec->thread_masks[t].affinity.bits); |
| 3651 | if (verbose > 0) { |
| 3652 | pr_debug("thread_masks[%d]: ", t); |
| 3653 | mmap_cpu_mask__scnprintf(&rec->thread_masks[t].maps, "maps"); |
| 3654 | pr_debug("thread_masks[%d]: ", t); |
| 3655 | mmap_cpu_mask__scnprintf(&rec->thread_masks[t].affinity, "affinity"); |
| 3656 | } |
| 3657 | } |
| 3658 | |
| 3659 | return 0; |
| 3660 | } |
| 3661 | |
| 3662 | static int record__init_thread_masks_spec(struct record *rec, struct perf_cpu_map *cpus, |
| 3663 | const char **maps_spec, const char **affinity_spec, |
| 3664 | u32 nr_spec) |
| 3665 | { |
| 3666 | u32 s; |
| 3667 | int ret = 0, t = 0; |
| 3668 | struct mmap_cpu_mask cpus_mask; |
| 3669 | struct thread_mask thread_mask, full_mask, *thread_masks; |
| 3670 | |
| 3671 | ret = record__mmap_cpu_mask_alloc(&cpus_mask, cpu__max_cpu().cpu); |
| 3672 | if (ret) { |
| 3673 | pr_err("Failed to allocate CPUs mask\n"); |
| 3674 | return ret; |
| 3675 | } |
| 3676 | |
| 3677 | ret = record__mmap_cpu_mask_init(&cpus_mask, cpus); |
| 3678 | if (ret) { |
| 3679 | pr_err("Failed to init cpu mask\n"); |
| 3680 | goto out_free_cpu_mask; |
| 3681 | } |
| 3682 | |
| 3683 | ret = record__thread_mask_alloc(&full_mask, cpu__max_cpu().cpu); |
| 3684 | if (ret) { |
| 3685 | pr_err("Failed to allocate full mask\n"); |
| 3686 | goto out_free_cpu_mask; |
| 3687 | } |
| 3688 | |
| 3689 | ret = record__thread_mask_alloc(&thread_mask, cpu__max_cpu().cpu); |
| 3690 | if (ret) { |
| 3691 | pr_err("Failed to allocate thread mask\n"); |
| 3692 | goto out_free_full_and_cpu_masks; |
| 3693 | } |
| 3694 | |
| 3695 | for (s = 0; s < nr_spec; s++) { |
| 3696 | ret = record__mmap_cpu_mask_init_spec(&thread_mask.maps, maps_spec[s]); |
| 3697 | if (ret) { |
| 3698 | pr_err("Failed to initialize maps thread mask\n"); |
| 3699 | goto out_free; |
| 3700 | } |
| 3701 | ret = record__mmap_cpu_mask_init_spec(&thread_mask.affinity, affinity_spec[s]); |
| 3702 | if (ret) { |
| 3703 | pr_err("Failed to initialize affinity thread mask\n"); |
| 3704 | goto out_free; |
| 3705 | } |
| 3706 | |
| 3707 | /* ignore invalid CPUs but do not allow empty masks */ |
| 3708 | if (!bitmap_and(thread_mask.maps.bits, thread_mask.maps.bits, |
| 3709 | cpus_mask.bits, thread_mask.maps.nbits)) { |
| 3710 | pr_err("Empty maps mask: %s\n", maps_spec[s]); |
| 3711 | ret = -EINVAL; |
| 3712 | goto out_free; |
| 3713 | } |
| 3714 | if (!bitmap_and(thread_mask.affinity.bits, thread_mask.affinity.bits, |
| 3715 | cpus_mask.bits, thread_mask.affinity.nbits)) { |
| 3716 | pr_err("Empty affinity mask: %s\n", affinity_spec[s]); |
| 3717 | ret = -EINVAL; |
| 3718 | goto out_free; |
| 3719 | } |
| 3720 | |
| 3721 | /* do not allow intersection with other masks (full_mask) */ |
| 3722 | if (bitmap_intersects(thread_mask.maps.bits, full_mask.maps.bits, |
| 3723 | thread_mask.maps.nbits)) { |
| 3724 | pr_err("Intersecting maps mask: %s\n", maps_spec[s]); |
| 3725 | ret = -EINVAL; |
| 3726 | goto out_free; |
| 3727 | } |
| 3728 | if (bitmap_intersects(thread_mask.affinity.bits, full_mask.affinity.bits, |
| 3729 | thread_mask.affinity.nbits)) { |
| 3730 | pr_err("Intersecting affinity mask: %s\n", affinity_spec[s]); |
| 3731 | ret = -EINVAL; |
| 3732 | goto out_free; |
| 3733 | } |
| 3734 | |
| 3735 | bitmap_or(full_mask.maps.bits, full_mask.maps.bits, |
| 3736 | thread_mask.maps.bits, full_mask.maps.nbits); |
| 3737 | bitmap_or(full_mask.affinity.bits, full_mask.affinity.bits, |
| 3738 | thread_mask.affinity.bits, full_mask.maps.nbits); |
| 3739 | |
| 3740 | thread_masks = realloc(rec->thread_masks, (t + 1) * sizeof(struct thread_mask)); |
| 3741 | if (!thread_masks) { |
| 3742 | pr_err("Failed to reallocate thread masks\n"); |
| 3743 | ret = -ENOMEM; |
| 3744 | goto out_free; |
| 3745 | } |
| 3746 | rec->thread_masks = thread_masks; |
| 3747 | rec->thread_masks[t] = thread_mask; |
| 3748 | if (verbose > 0) { |
| 3749 | pr_debug("thread_masks[%d]: ", t); |
| 3750 | mmap_cpu_mask__scnprintf(&rec->thread_masks[t].maps, "maps"); |
| 3751 | pr_debug("thread_masks[%d]: ", t); |
| 3752 | mmap_cpu_mask__scnprintf(&rec->thread_masks[t].affinity, "affinity"); |
| 3753 | } |
| 3754 | t++; |
| 3755 | ret = record__thread_mask_alloc(&thread_mask, cpu__max_cpu().cpu); |
| 3756 | if (ret) { |
| 3757 | pr_err("Failed to allocate thread mask\n"); |
| 3758 | goto out_free_full_and_cpu_masks; |
| 3759 | } |
| 3760 | } |
| 3761 | rec->nr_threads = t; |
| 3762 | pr_debug("nr_threads: %d\n", rec->nr_threads); |
| 3763 | if (!rec->nr_threads) |
| 3764 | ret = -EINVAL; |
| 3765 | |
| 3766 | out_free: |
| 3767 | record__thread_mask_free(&thread_mask); |
| 3768 | out_free_full_and_cpu_masks: |
| 3769 | record__thread_mask_free(&full_mask); |
| 3770 | out_free_cpu_mask: |
| 3771 | record__mmap_cpu_mask_free(&cpus_mask); |
| 3772 | |
| 3773 | return ret; |
| 3774 | } |
| 3775 | |
| 3776 | static int record__init_thread_core_masks(struct record *rec, struct perf_cpu_map *cpus) |
| 3777 | { |
| 3778 | int ret; |
| 3779 | struct cpu_topology *topo; |
| 3780 | |
| 3781 | topo = cpu_topology__new(); |
| 3782 | if (!topo) { |
| 3783 | pr_err("Failed to allocate CPU topology\n"); |
| 3784 | return -ENOMEM; |
| 3785 | } |
| 3786 | |
| 3787 | ret = record__init_thread_masks_spec(rec, cpus, topo->core_cpus_list, |
| 3788 | topo->core_cpus_list, topo->core_cpus_lists); |
| 3789 | cpu_topology__delete(topo); |
| 3790 | |
| 3791 | return ret; |
| 3792 | } |
| 3793 | |
| 3794 | static int record__init_thread_package_masks(struct record *rec, struct perf_cpu_map *cpus) |
| 3795 | { |
| 3796 | int ret; |
| 3797 | struct cpu_topology *topo; |
| 3798 | |
| 3799 | topo = cpu_topology__new(); |
| 3800 | if (!topo) { |
| 3801 | pr_err("Failed to allocate CPU topology\n"); |
| 3802 | return -ENOMEM; |
| 3803 | } |
| 3804 | |
| 3805 | ret = record__init_thread_masks_spec(rec, cpus, topo->package_cpus_list, |
| 3806 | topo->package_cpus_list, topo->package_cpus_lists); |
| 3807 | cpu_topology__delete(topo); |
| 3808 | |
| 3809 | return ret; |
| 3810 | } |
| 3811 | |
| 3812 | static int record__init_thread_numa_masks(struct record *rec, struct perf_cpu_map *cpus) |
| 3813 | { |
| 3814 | u32 s; |
| 3815 | int ret; |
| 3816 | const char **spec; |
| 3817 | struct numa_topology *topo; |
| 3818 | |
| 3819 | topo = numa_topology__new(); |
| 3820 | if (!topo) { |
| 3821 | pr_err("Failed to allocate NUMA topology\n"); |
| 3822 | return -ENOMEM; |
| 3823 | } |
| 3824 | |
| 3825 | spec = zalloc(topo->nr * sizeof(char *)); |
| 3826 | if (!spec) { |
| 3827 | pr_err("Failed to allocate NUMA spec\n"); |
| 3828 | ret = -ENOMEM; |
| 3829 | goto out_delete_topo; |
| 3830 | } |
| 3831 | for (s = 0; s < topo->nr; s++) |
| 3832 | spec[s] = topo->nodes[s].cpus; |
| 3833 | |
| 3834 | ret = record__init_thread_masks_spec(rec, cpus, spec, spec, topo->nr); |
| 3835 | |
| 3836 | zfree(&spec); |
| 3837 | |
| 3838 | out_delete_topo: |
| 3839 | numa_topology__delete(topo); |
| 3840 | |
| 3841 | return ret; |
| 3842 | } |
| 3843 | |
| 3844 | static int record__init_thread_user_masks(struct record *rec, struct perf_cpu_map *cpus) |
| 3845 | { |
| 3846 | int t, ret; |
| 3847 | u32 s, nr_spec = 0; |
| 3848 | char **maps_spec = NULL, **affinity_spec = NULL, **tmp_spec; |
| 3849 | char *user_spec, *spec, *spec_ptr, *mask, *mask_ptr, *dup_mask = NULL; |
| 3850 | |
| 3851 | for (t = 0, user_spec = (char *)rec->opts.threads_user_spec; ; t++, user_spec = NULL) { |
| 3852 | spec = strtok_r(user_spec, ":", &spec_ptr); |
| 3853 | if (spec == NULL) |
| 3854 | break; |
| 3855 | pr_debug2("threads_spec[%d]: %s\n", t, spec); |
| 3856 | mask = strtok_r(spec, "/", &mask_ptr); |
| 3857 | if (mask == NULL) |
| 3858 | break; |
| 3859 | pr_debug2(" maps mask: %s\n", mask); |
| 3860 | tmp_spec = realloc(maps_spec, (nr_spec + 1) * sizeof(char *)); |
| 3861 | if (!tmp_spec) { |
| 3862 | pr_err("Failed to reallocate maps spec\n"); |
| 3863 | ret = -ENOMEM; |
| 3864 | goto out_free; |
| 3865 | } |
| 3866 | maps_spec = tmp_spec; |
| 3867 | maps_spec[nr_spec] = dup_mask = strdup(mask); |
| 3868 | if (!maps_spec[nr_spec]) { |
| 3869 | pr_err("Failed to allocate maps spec[%d]\n", nr_spec); |
| 3870 | ret = -ENOMEM; |
| 3871 | goto out_free; |
| 3872 | } |
| 3873 | mask = strtok_r(NULL, "/", &mask_ptr); |
| 3874 | if (mask == NULL) { |
| 3875 | pr_err("Invalid thread maps or affinity specs\n"); |
| 3876 | ret = -EINVAL; |
| 3877 | goto out_free; |
| 3878 | } |
| 3879 | pr_debug2(" affinity mask: %s\n", mask); |
| 3880 | tmp_spec = realloc(affinity_spec, (nr_spec + 1) * sizeof(char *)); |
| 3881 | if (!tmp_spec) { |
| 3882 | pr_err("Failed to reallocate affinity spec\n"); |
| 3883 | ret = -ENOMEM; |
| 3884 | goto out_free; |
| 3885 | } |
| 3886 | affinity_spec = tmp_spec; |
| 3887 | affinity_spec[nr_spec] = strdup(mask); |
| 3888 | if (!affinity_spec[nr_spec]) { |
| 3889 | pr_err("Failed to allocate affinity spec[%d]\n", nr_spec); |
| 3890 | ret = -ENOMEM; |
| 3891 | goto out_free; |
| 3892 | } |
| 3893 | dup_mask = NULL; |
| 3894 | nr_spec++; |
| 3895 | } |
| 3896 | |
| 3897 | ret = record__init_thread_masks_spec(rec, cpus, (const char **)maps_spec, |
| 3898 | (const char **)affinity_spec, nr_spec); |
| 3899 | |
| 3900 | out_free: |
| 3901 | free(dup_mask); |
| 3902 | for (s = 0; s < nr_spec; s++) { |
| 3903 | if (maps_spec) |
| 3904 | free(maps_spec[s]); |
| 3905 | if (affinity_spec) |
| 3906 | free(affinity_spec[s]); |
| 3907 | } |
| 3908 | free(affinity_spec); |
| 3909 | free(maps_spec); |
| 3910 | |
| 3911 | return ret; |
| 3912 | } |
| 3913 | |
| 3914 | static int record__init_thread_default_masks(struct record *rec, struct perf_cpu_map *cpus) |
| 3915 | { |
| 3916 | int ret; |
| 3917 | |
| 3918 | ret = record__alloc_thread_masks(rec, 1, cpu__max_cpu().cpu); |
| 3919 | if (ret) |
| 3920 | return ret; |
| 3921 | |
| 3922 | if (record__mmap_cpu_mask_init(&rec->thread_masks->maps, cpus)) |
| 3923 | return -ENODEV; |
| 3924 | |
| 3925 | rec->nr_threads = 1; |
| 3926 | |
| 3927 | return 0; |
| 3928 | } |
| 3929 | |
| 3930 | static int record__init_thread_masks(struct record *rec) |
| 3931 | { |
| 3932 | int ret = 0; |
| 3933 | struct perf_cpu_map *cpus = rec->evlist->core.all_cpus; |
| 3934 | |
| 3935 | if (!record__threads_enabled(rec)) |
| 3936 | return record__init_thread_default_masks(rec, cpus); |
| 3937 | |
| 3938 | if (evlist__per_thread(rec->evlist)) { |
| 3939 | pr_err("--per-thread option is mutually exclusive to parallel streaming mode.\n"); |
| 3940 | return -EINVAL; |
| 3941 | } |
| 3942 | |
| 3943 | switch (rec->opts.threads_spec) { |
| 3944 | case THREAD_SPEC__CPU: |
| 3945 | ret = record__init_thread_cpu_masks(rec, cpus); |
| 3946 | break; |
| 3947 | case THREAD_SPEC__CORE: |
| 3948 | ret = record__init_thread_core_masks(rec, cpus); |
| 3949 | break; |
| 3950 | case THREAD_SPEC__PACKAGE: |
| 3951 | ret = record__init_thread_package_masks(rec, cpus); |
| 3952 | break; |
| 3953 | case THREAD_SPEC__NUMA: |
| 3954 | ret = record__init_thread_numa_masks(rec, cpus); |
| 3955 | break; |
| 3956 | case THREAD_SPEC__USER: |
| 3957 | ret = record__init_thread_user_masks(rec, cpus); |
| 3958 | break; |
| 3959 | default: |
| 3960 | break; |
| 3961 | } |
| 3962 | |
| 3963 | return ret; |
| 3964 | } |
| 3965 | |
| 3966 | int cmd_record(int argc, const char **argv) |
| 3967 | { |
| 3968 | int err; |
| 3969 | struct record *rec = &record; |
| 3970 | char errbuf[BUFSIZ]; |
| 3971 | |
| 3972 | setlocale(LC_ALL, ""); |
| 3973 | |
| 3974 | #ifndef HAVE_BPF_SKEL |
| 3975 | # define set_nobuild(s, l, m, c) set_option_nobuild(record_options, s, l, m, c) |
| 3976 | set_nobuild('\0', "off-cpu", "no BUILD_BPF_SKEL=1", true); |
| 3977 | # undef set_nobuild |
| 3978 | #endif |
| 3979 | |
| 3980 | /* Disable eager loading of kernel symbols that adds overhead to perf record. */ |
| 3981 | symbol_conf.lazy_load_kernel_maps = true; |
| 3982 | rec->opts.affinity = PERF_AFFINITY_SYS; |
| 3983 | |
| 3984 | rec->evlist = evlist__new(); |
| 3985 | if (rec->evlist == NULL) |
| 3986 | return -ENOMEM; |
| 3987 | |
| 3988 | err = perf_config(perf_record_config, rec); |
| 3989 | if (err) |
| 3990 | return err; |
| 3991 | |
| 3992 | argc = parse_options(argc, argv, record_options, record_usage, |
| 3993 | PARSE_OPT_STOP_AT_NON_OPTION); |
| 3994 | if (quiet) |
| 3995 | perf_quiet_option(); |
| 3996 | |
| 3997 | err = symbol__validate_sym_arguments(); |
| 3998 | if (err) |
| 3999 | return err; |
| 4000 | |
| 4001 | perf_debuginfod_setup(&record.debuginfod); |
| 4002 | |
| 4003 | /* Make system wide (-a) the default target. */ |
| 4004 | if (!argc && target__none(&rec->opts.target)) |
| 4005 | rec->opts.target.system_wide = true; |
| 4006 | |
| 4007 | if (nr_cgroups && !rec->opts.target.system_wide) { |
| 4008 | usage_with_options_msg(record_usage, record_options, |
| 4009 | "cgroup monitoring only available in system-wide mode"); |
| 4010 | |
| 4011 | } |
| 4012 | |
| 4013 | if (rec->buildid_mmap) { |
| 4014 | if (!perf_can_record_build_id()) { |
| 4015 | pr_err("Failed: no support to record build id in mmap events, update your kernel.\n"); |
| 4016 | err = -EINVAL; |
| 4017 | goto out_opts; |
| 4018 | } |
| 4019 | pr_debug("Enabling build id in mmap2 events.\n"); |
| 4020 | /* Enable mmap build id synthesizing. */ |
| 4021 | symbol_conf.buildid_mmap2 = true; |
| 4022 | /* Enable perf_event_attr::build_id bit. */ |
| 4023 | rec->opts.build_id = true; |
| 4024 | /* Disable build id cache. */ |
| 4025 | rec->no_buildid = true; |
| 4026 | } |
| 4027 | |
| 4028 | if (rec->opts.record_cgroup && !perf_can_record_cgroup()) { |
| 4029 | pr_err("Kernel has no cgroup sampling support.\n"); |
| 4030 | err = -EINVAL; |
| 4031 | goto out_opts; |
| 4032 | } |
| 4033 | |
| 4034 | if (rec->opts.kcore) |
| 4035 | rec->opts.text_poke = true; |
| 4036 | |
| 4037 | if (rec->opts.kcore || record__threads_enabled(rec)) |
| 4038 | rec->data.is_dir = true; |
| 4039 | |
| 4040 | if (record__threads_enabled(rec)) { |
| 4041 | if (rec->opts.affinity != PERF_AFFINITY_SYS) { |
| 4042 | pr_err("--affinity option is mutually exclusive to parallel streaming mode.\n"); |
| 4043 | goto out_opts; |
| 4044 | } |
| 4045 | if (record__aio_enabled(rec)) { |
| 4046 | pr_err("Asynchronous streaming mode (--aio) is mutually exclusive to parallel streaming mode.\n"); |
| 4047 | goto out_opts; |
| 4048 | } |
| 4049 | } |
| 4050 | |
| 4051 | if (rec->opts.comp_level != 0) { |
| 4052 | pr_debug("Compression enabled, disabling build id collection at the end of the session.\n"); |
| 4053 | rec->no_buildid = true; |
| 4054 | } |
| 4055 | |
| 4056 | if (rec->opts.record_switch_events && |
| 4057 | !perf_can_record_switch_events()) { |
| 4058 | ui__error("kernel does not support recording context switch events\n"); |
| 4059 | parse_options_usage(record_usage, record_options, "switch-events", 0); |
| 4060 | err = -EINVAL; |
| 4061 | goto out_opts; |
| 4062 | } |
| 4063 | |
| 4064 | if (switch_output_setup(rec)) { |
| 4065 | parse_options_usage(record_usage, record_options, "switch-output", 0); |
| 4066 | err = -EINVAL; |
| 4067 | goto out_opts; |
| 4068 | } |
| 4069 | |
| 4070 | if (rec->switch_output.time) { |
| 4071 | signal(SIGALRM, alarm_sig_handler); |
| 4072 | alarm(rec->switch_output.time); |
| 4073 | } |
| 4074 | |
| 4075 | if (rec->switch_output.num_files) { |
| 4076 | rec->switch_output.filenames = calloc(rec->switch_output.num_files, |
| 4077 | sizeof(char *)); |
| 4078 | if (!rec->switch_output.filenames) { |
| 4079 | err = -EINVAL; |
| 4080 | goto out_opts; |
| 4081 | } |
| 4082 | } |
| 4083 | |
| 4084 | if (rec->timestamp_filename && record__threads_enabled(rec)) { |
| 4085 | rec->timestamp_filename = false; |
| 4086 | pr_warning("WARNING: --timestamp-filename option is not available in parallel streaming mode.\n"); |
| 4087 | } |
| 4088 | |
| 4089 | /* |
| 4090 | * Allow aliases to facilitate the lookup of symbols for address |
| 4091 | * filters. Refer to auxtrace_parse_filters(). |
| 4092 | */ |
| 4093 | symbol_conf.allow_aliases = true; |
| 4094 | |
| 4095 | symbol__init(NULL); |
| 4096 | |
| 4097 | err = record__auxtrace_init(rec); |
| 4098 | if (err) |
| 4099 | goto out; |
| 4100 | |
| 4101 | if (dry_run) |
| 4102 | goto out; |
| 4103 | |
| 4104 | err = -ENOMEM; |
| 4105 | |
| 4106 | if (rec->no_buildid_cache || rec->no_buildid) { |
| 4107 | disable_buildid_cache(); |
| 4108 | } else if (rec->switch_output.enabled) { |
| 4109 | /* |
| 4110 | * In 'perf record --switch-output', disable buildid |
| 4111 | * generation by default to reduce data file switching |
| 4112 | * overhead. Still generate buildid if they are required |
| 4113 | * explicitly using |
| 4114 | * |
| 4115 | * perf record --switch-output --no-no-buildid \ |
| 4116 | * --no-no-buildid-cache |
| 4117 | * |
| 4118 | * Following code equals to: |
| 4119 | * |
| 4120 | * if ((rec->no_buildid || !rec->no_buildid_set) && |
| 4121 | * (rec->no_buildid_cache || !rec->no_buildid_cache_set)) |
| 4122 | * disable_buildid_cache(); |
| 4123 | */ |
| 4124 | bool disable = true; |
| 4125 | |
| 4126 | if (rec->no_buildid_set && !rec->no_buildid) |
| 4127 | disable = false; |
| 4128 | if (rec->no_buildid_cache_set && !rec->no_buildid_cache) |
| 4129 | disable = false; |
| 4130 | if (disable) { |
| 4131 | rec->no_buildid = true; |
| 4132 | rec->no_buildid_cache = true; |
| 4133 | disable_buildid_cache(); |
| 4134 | } |
| 4135 | } |
| 4136 | |
| 4137 | if (record.opts.overwrite) |
| 4138 | record.opts.tail_synthesize = true; |
| 4139 | |
| 4140 | if (rec->evlist->core.nr_entries == 0) { |
| 4141 | bool can_profile_kernel = perf_event_paranoid_check(1); |
| 4142 | |
| 4143 | err = parse_event(rec->evlist, can_profile_kernel ? "cycles:P" : "cycles:Pu"); |
| 4144 | if (err) |
| 4145 | goto out; |
| 4146 | } |
| 4147 | |
| 4148 | if (rec->opts.target.tid && !rec->opts.no_inherit_set) |
| 4149 | rec->opts.no_inherit = true; |
| 4150 | |
| 4151 | err = target__validate(&rec->opts.target); |
| 4152 | if (err) { |
| 4153 | target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); |
| 4154 | ui__warning("%s\n", errbuf); |
| 4155 | } |
| 4156 | |
| 4157 | err = target__parse_uid(&rec->opts.target); |
| 4158 | if (err) { |
| 4159 | int saved_errno = errno; |
| 4160 | |
| 4161 | target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); |
| 4162 | ui__error("%s", errbuf); |
| 4163 | |
| 4164 | err = -saved_errno; |
| 4165 | goto out; |
| 4166 | } |
| 4167 | |
| 4168 | /* Enable ignoring missing threads when -u/-p option is defined. */ |
| 4169 | rec->opts.ignore_missing_thread = rec->opts.target.uid != UINT_MAX || rec->opts.target.pid; |
| 4170 | |
| 4171 | evlist__warn_user_requested_cpus(rec->evlist, rec->opts.target.cpu_list); |
| 4172 | |
| 4173 | if (callchain_param.enabled && callchain_param.record_mode == CALLCHAIN_FP) |
| 4174 | arch__add_leaf_frame_record_opts(&rec->opts); |
| 4175 | |
| 4176 | err = -ENOMEM; |
| 4177 | if (evlist__create_maps(rec->evlist, &rec->opts.target) < 0) { |
| 4178 | if (rec->opts.target.pid != NULL) { |
| 4179 | pr_err("Couldn't create thread/CPU maps: %s\n", |
| 4180 | errno == ENOENT ? "No such process" : str_error_r(errno, errbuf, sizeof(errbuf))); |
| 4181 | goto out; |
| 4182 | } |
| 4183 | else |
| 4184 | usage_with_options(record_usage, record_options); |
| 4185 | } |
| 4186 | |
| 4187 | err = auxtrace_record__options(rec->itr, rec->evlist, &rec->opts); |
| 4188 | if (err) |
| 4189 | goto out; |
| 4190 | |
| 4191 | /* |
| 4192 | * We take all buildids when the file contains |
| 4193 | * AUX area tracing data because we do not decode the |
| 4194 | * trace because it would take too long. |
| 4195 | */ |
| 4196 | if (rec->opts.full_auxtrace) |
| 4197 | rec->buildid_all = true; |
| 4198 | |
| 4199 | if (rec->opts.text_poke) { |
| 4200 | err = record__config_text_poke(rec->evlist); |
| 4201 | if (err) { |
| 4202 | pr_err("record__config_text_poke failed, error %d\n", err); |
| 4203 | goto out; |
| 4204 | } |
| 4205 | } |
| 4206 | |
| 4207 | if (rec->off_cpu) { |
| 4208 | err = record__config_off_cpu(rec); |
| 4209 | if (err) { |
| 4210 | pr_err("record__config_off_cpu failed, error %d\n", err); |
| 4211 | goto out; |
| 4212 | } |
| 4213 | } |
| 4214 | |
| 4215 | if (record_opts__config(&rec->opts)) { |
| 4216 | err = -EINVAL; |
| 4217 | goto out; |
| 4218 | } |
| 4219 | |
| 4220 | err = record__config_tracking_events(rec); |
| 4221 | if (err) { |
| 4222 | pr_err("record__config_tracking_events failed, error %d\n", err); |
| 4223 | goto out; |
| 4224 | } |
| 4225 | |
| 4226 | err = record__init_thread_masks(rec); |
| 4227 | if (err) { |
| 4228 | pr_err("Failed to initialize parallel data streaming masks\n"); |
| 4229 | goto out; |
| 4230 | } |
| 4231 | |
| 4232 | if (rec->opts.nr_cblocks > nr_cblocks_max) |
| 4233 | rec->opts.nr_cblocks = nr_cblocks_max; |
| 4234 | pr_debug("nr_cblocks: %d\n", rec->opts.nr_cblocks); |
| 4235 | |
| 4236 | pr_debug("affinity: %s\n", affinity_tags[rec->opts.affinity]); |
| 4237 | pr_debug("mmap flush: %d\n", rec->opts.mmap_flush); |
| 4238 | |
| 4239 | if (rec->opts.comp_level > comp_level_max) |
| 4240 | rec->opts.comp_level = comp_level_max; |
| 4241 | pr_debug("comp level: %d\n", rec->opts.comp_level); |
| 4242 | |
| 4243 | err = __cmd_record(&record, argc, argv); |
| 4244 | out: |
| 4245 | evlist__delete(rec->evlist); |
| 4246 | symbol__exit(); |
| 4247 | auxtrace_record__free(rec->itr); |
| 4248 | out_opts: |
| 4249 | record__free_thread_masks(rec, rec->nr_threads); |
| 4250 | rec->nr_threads = 0; |
| 4251 | evlist__close_control(rec->opts.ctl_fd, rec->opts.ctl_fd_ack, &rec->opts.ctl_fd_close); |
| 4252 | return err; |
| 4253 | } |
| 4254 | |
| 4255 | static void snapshot_sig_handler(int sig __maybe_unused) |
| 4256 | { |
| 4257 | struct record *rec = &record; |
| 4258 | |
| 4259 | hit_auxtrace_snapshot_trigger(rec); |
| 4260 | |
| 4261 | if (switch_output_signal(rec)) |
| 4262 | trigger_hit(&switch_output_trigger); |
| 4263 | } |
| 4264 | |
| 4265 | static void alarm_sig_handler(int sig __maybe_unused) |
| 4266 | { |
| 4267 | struct record *rec = &record; |
| 4268 | |
| 4269 | if (switch_output_time(rec)) |
| 4270 | trigger_hit(&switch_output_trigger); |
| 4271 | } |