Commit | Line | Data |
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b2441318 | 1 | // SPDX-License-Identifier: GPL-2.0 |
abaff32a | 2 | /* |
bf9e1876 IM |
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. | |
abaff32a | 8 | */ |
16f762a2 | 9 | #include "builtin.h" |
bf9e1876 | 10 | |
6122e4e4 | 11 | #include "util/build-id.h" |
4b6ab94e | 12 | #include <subcmd/parse-options.h> |
8ad8db37 | 13 | #include "util/parse-events.h" |
41840d21 | 14 | #include "util/config.h" |
6eda5838 | 15 | |
8f651eae | 16 | #include "util/callchain.h" |
f14d5707 | 17 | #include "util/cgroup.h" |
7c6a1c65 | 18 | #include "util/header.h" |
66e274f3 | 19 | #include "util/event.h" |
361c99a6 | 20 | #include "util/evlist.h" |
69aad6f1 | 21 | #include "util/evsel.h" |
8f28827a | 22 | #include "util/debug.h" |
e0fcfb08 | 23 | #include "util/mmap.h" |
aeb00b1a | 24 | #include "util/target.h" |
94c744b6 | 25 | #include "util/session.h" |
45694aa7 | 26 | #include "util/tool.h" |
8d06367f | 27 | #include "util/symbol.h" |
aeb00b1a | 28 | #include "util/record.h" |
a12b51c4 | 29 | #include "util/cpumap.h" |
fd78260b | 30 | #include "util/thread_map.h" |
f5fc1412 | 31 | #include "util/data.h" |
bcc84ec6 | 32 | #include "util/perf_regs.h" |
ef149c25 | 33 | #include "util/auxtrace.h" |
46bc29b9 | 34 | #include "util/tsc.h" |
f00898f4 | 35 | #include "util/parse-branch-options.h" |
bcc84ec6 | 36 | #include "util/parse-regs-options.h" |
40c7d246 | 37 | #include "util/perf_api_probe.h" |
71dc2326 | 38 | #include "util/llvm-utils.h" |
8690a2a7 | 39 | #include "util/bpf-loader.h" |
5f9cf599 | 40 | #include "util/trigger.h" |
a074865e | 41 | #include "util/perf-hooks.h" |
f13de660 | 42 | #include "util/cpu-set-sched.h" |
ea49e01c | 43 | #include "util/synthetic-events.h" |
c5e4027e | 44 | #include "util/time-utils.h" |
58db1d6e | 45 | #include "util/units.h" |
7b612e29 | 46 | #include "util/bpf-event.h" |
d99c22ea | 47 | #include "util/util.h" |
70943490 | 48 | #include "util/pfm.h" |
6953beb4 | 49 | #include "util/clockid.h" |
d8871ea7 | 50 | #include "asm/bug.h" |
c1a604df | 51 | #include "perf.h" |
7c6a1c65 | 52 | |
a43783ae | 53 | #include <errno.h> |
fd20e811 | 54 | #include <inttypes.h> |
67230479 | 55 | #include <locale.h> |
4208735d | 56 | #include <poll.h> |
d99c22ea | 57 | #include <pthread.h> |
97124d5e | 58 | #include <unistd.h> |
de9ac07b | 59 | #include <sched.h> |
9607ad3a | 60 | #include <signal.h> |
da231338 AM |
61 | #ifdef HAVE_EVENTFD_SUPPORT |
62 | #include <sys/eventfd.h> | |
63 | #endif | |
a41794cd | 64 | #include <sys/mman.h> |
4208735d | 65 | #include <sys/wait.h> |
eeb399b5 AH |
66 | #include <sys/types.h> |
67 | #include <sys/stat.h> | |
68 | #include <fcntl.h> | |
6ef81c55 | 69 | #include <linux/err.h> |
8520a98d | 70 | #include <linux/string.h> |
0693e680 | 71 | #include <linux/time64.h> |
d8f9da24 | 72 | #include <linux/zalloc.h> |
8384a260 | 73 | #include <linux/bitmap.h> |
d1e325cf | 74 | #include <sys/time.h> |
78da39fa | 75 | |
1b43b704 | 76 | struct switch_output { |
dc0c6127 | 77 | bool enabled; |
1b43b704 | 78 | bool signal; |
dc0c6127 | 79 | unsigned long size; |
bfacbe3b | 80 | unsigned long time; |
cb4e1ebb JO |
81 | const char *str; |
82 | bool set; | |
03724b2e AK |
83 | char **filenames; |
84 | int num_files; | |
85 | int cur_file; | |
1b43b704 JO |
86 | }; |
87 | ||
8c6f45a7 | 88 | struct record { |
45694aa7 | 89 | struct perf_tool tool; |
b4006796 | 90 | struct record_opts opts; |
d20deb64 | 91 | u64 bytes_written; |
8ceb41d7 | 92 | struct perf_data data; |
ef149c25 | 93 | struct auxtrace_record *itr; |
63503dba | 94 | struct evlist *evlist; |
d20deb64 | 95 | struct perf_session *session; |
bc477d79 | 96 | struct evlist *sb_evlist; |
899e5ffb | 97 | pthread_t thread_id; |
d20deb64 | 98 | int realtime_prio; |
899e5ffb | 99 | bool switch_output_event_set; |
d20deb64 | 100 | bool no_buildid; |
d2db9a98 | 101 | bool no_buildid_set; |
d20deb64 | 102 | bool no_buildid_cache; |
d2db9a98 | 103 | bool no_buildid_cache_set; |
6156681b | 104 | bool buildid_all; |
ecfd7a9c | 105 | bool timestamp_filename; |
68588baf | 106 | bool timestamp_boundary; |
1b43b704 | 107 | struct switch_output switch_output; |
9f065194 | 108 | unsigned long long samples; |
8384a260 | 109 | struct mmap_cpu_mask affinity_mask; |
6d575816 | 110 | unsigned long output_max_size; /* = 0: unlimited */ |
0f82ebc4 | 111 | }; |
a21ca2ca | 112 | |
6d575816 JS |
113 | static volatile int done; |
114 | ||
dc0c6127 JO |
115 | static volatile int auxtrace_record__snapshot_started; |
116 | static DEFINE_TRIGGER(auxtrace_snapshot_trigger); | |
117 | static DEFINE_TRIGGER(switch_output_trigger); | |
118 | ||
9d2ed645 AB |
119 | static const char *affinity_tags[PERF_AFFINITY_MAX] = { |
120 | "SYS", "NODE", "CPU" | |
121 | }; | |
122 | ||
dc0c6127 JO |
123 | static bool switch_output_signal(struct record *rec) |
124 | { | |
125 | return rec->switch_output.signal && | |
126 | trigger_is_ready(&switch_output_trigger); | |
127 | } | |
128 | ||
129 | static bool switch_output_size(struct record *rec) | |
130 | { | |
131 | return rec->switch_output.size && | |
132 | trigger_is_ready(&switch_output_trigger) && | |
133 | (rec->bytes_written >= rec->switch_output.size); | |
134 | } | |
135 | ||
bfacbe3b JO |
136 | static bool switch_output_time(struct record *rec) |
137 | { | |
138 | return rec->switch_output.time && | |
139 | trigger_is_ready(&switch_output_trigger); | |
140 | } | |
141 | ||
6d575816 JS |
142 | static bool record__output_max_size_exceeded(struct record *rec) |
143 | { | |
144 | return rec->output_max_size && | |
145 | (rec->bytes_written >= rec->output_max_size); | |
146 | } | |
147 | ||
a5830532 | 148 | static int record__write(struct record *rec, struct mmap *map __maybe_unused, |
ded2b8fe | 149 | void *bf, size_t size) |
f5970550 | 150 | { |
ded2b8fe JO |
151 | struct perf_data_file *file = &rec->session->data->file; |
152 | ||
153 | if (perf_data_file__write(file, bf, size) < 0) { | |
50a9b868 JO |
154 | pr_err("failed to write perf data, error: %m\n"); |
155 | return -1; | |
f5970550 | 156 | } |
8d3eca20 | 157 | |
cf8b2e69 | 158 | rec->bytes_written += size; |
dc0c6127 | 159 | |
6d575816 JS |
160 | if (record__output_max_size_exceeded(rec) && !done) { |
161 | fprintf(stderr, "[ perf record: perf size limit reached (%" PRIu64 " KB)," | |
162 | " stopping session ]\n", | |
163 | rec->bytes_written >> 10); | |
164 | done = 1; | |
165 | } | |
166 | ||
dc0c6127 JO |
167 | if (switch_output_size(rec)) |
168 | trigger_hit(&switch_output_trigger); | |
169 | ||
8d3eca20 | 170 | return 0; |
f5970550 PZ |
171 | } |
172 | ||
ef781128 AB |
173 | static int record__aio_enabled(struct record *rec); |
174 | static int record__comp_enabled(struct record *rec); | |
5d7f4116 AB |
175 | static size_t zstd_compress(struct perf_session *session, void *dst, size_t dst_size, |
176 | void *src, size_t src_size); | |
177 | ||
d3d1af6f AB |
178 | #ifdef HAVE_AIO_SUPPORT |
179 | static int record__aio_write(struct aiocb *cblock, int trace_fd, | |
180 | void *buf, size_t size, off_t off) | |
181 | { | |
182 | int rc; | |
183 | ||
184 | cblock->aio_fildes = trace_fd; | |
185 | cblock->aio_buf = buf; | |
186 | cblock->aio_nbytes = size; | |
187 | cblock->aio_offset = off; | |
188 | cblock->aio_sigevent.sigev_notify = SIGEV_NONE; | |
189 | ||
190 | do { | |
191 | rc = aio_write(cblock); | |
192 | if (rc == 0) { | |
193 | break; | |
194 | } else if (errno != EAGAIN) { | |
195 | cblock->aio_fildes = -1; | |
196 | pr_err("failed to queue perf data, error: %m\n"); | |
197 | break; | |
198 | } | |
199 | } while (1); | |
200 | ||
201 | return rc; | |
202 | } | |
203 | ||
a5830532 | 204 | static int record__aio_complete(struct mmap *md, struct aiocb *cblock) |
d3d1af6f AB |
205 | { |
206 | void *rem_buf; | |
207 | off_t rem_off; | |
208 | size_t rem_size; | |
209 | int rc, aio_errno; | |
210 | ssize_t aio_ret, written; | |
211 | ||
212 | aio_errno = aio_error(cblock); | |
213 | if (aio_errno == EINPROGRESS) | |
214 | return 0; | |
215 | ||
216 | written = aio_ret = aio_return(cblock); | |
217 | if (aio_ret < 0) { | |
218 | if (aio_errno != EINTR) | |
219 | pr_err("failed to write perf data, error: %m\n"); | |
220 | written = 0; | |
221 | } | |
222 | ||
223 | rem_size = cblock->aio_nbytes - written; | |
224 | ||
225 | if (rem_size == 0) { | |
226 | cblock->aio_fildes = -1; | |
227 | /* | |
ef781128 AB |
228 | * md->refcount is incremented in record__aio_pushfn() for |
229 | * every aio write request started in record__aio_push() so | |
230 | * decrement it because the request is now complete. | |
d3d1af6f | 231 | */ |
80e53d11 | 232 | perf_mmap__put(&md->core); |
d3d1af6f AB |
233 | rc = 1; |
234 | } else { | |
235 | /* | |
236 | * aio write request may require restart with the | |
237 | * reminder if the kernel didn't write whole | |
238 | * chunk at once. | |
239 | */ | |
240 | rem_off = cblock->aio_offset + written; | |
241 | rem_buf = (void *)(cblock->aio_buf + written); | |
242 | record__aio_write(cblock, cblock->aio_fildes, | |
243 | rem_buf, rem_size, rem_off); | |
244 | rc = 0; | |
245 | } | |
246 | ||
247 | return rc; | |
248 | } | |
249 | ||
a5830532 | 250 | static int record__aio_sync(struct mmap *md, bool sync_all) |
d3d1af6f | 251 | { |
93f20c0f AB |
252 | struct aiocb **aiocb = md->aio.aiocb; |
253 | struct aiocb *cblocks = md->aio.cblocks; | |
d3d1af6f | 254 | struct timespec timeout = { 0, 1000 * 1000 * 1 }; /* 1ms */ |
93f20c0f | 255 | int i, do_suspend; |
d3d1af6f AB |
256 | |
257 | do { | |
93f20c0f AB |
258 | do_suspend = 0; |
259 | for (i = 0; i < md->aio.nr_cblocks; ++i) { | |
260 | if (cblocks[i].aio_fildes == -1 || record__aio_complete(md, &cblocks[i])) { | |
261 | if (sync_all) | |
262 | aiocb[i] = NULL; | |
263 | else | |
264 | return i; | |
265 | } else { | |
266 | /* | |
267 | * Started aio write is not complete yet | |
268 | * so it has to be waited before the | |
269 | * next allocation. | |
270 | */ | |
271 | aiocb[i] = &cblocks[i]; | |
272 | do_suspend = 1; | |
273 | } | |
274 | } | |
275 | if (!do_suspend) | |
276 | return -1; | |
d3d1af6f | 277 | |
93f20c0f | 278 | while (aio_suspend((const struct aiocb **)aiocb, md->aio.nr_cblocks, &timeout)) { |
d3d1af6f AB |
279 | if (!(errno == EAGAIN || errno == EINTR)) |
280 | pr_err("failed to sync perf data, error: %m\n"); | |
281 | } | |
282 | } while (1); | |
283 | } | |
284 | ||
ef781128 AB |
285 | struct record_aio { |
286 | struct record *rec; | |
287 | void *data; | |
288 | size_t size; | |
289 | }; | |
290 | ||
a5830532 | 291 | static int record__aio_pushfn(struct mmap *map, void *to, void *buf, size_t size) |
d3d1af6f | 292 | { |
ef781128 | 293 | struct record_aio *aio = to; |
d3d1af6f | 294 | |
ef781128 | 295 | /* |
547740f7 | 296 | * map->core.base data pointed by buf is copied into free map->aio.data[] buffer |
ef781128 AB |
297 | * to release space in the kernel buffer as fast as possible, calling |
298 | * perf_mmap__consume() from perf_mmap__push() function. | |
299 | * | |
300 | * That lets the kernel to proceed with storing more profiling data into | |
301 | * the kernel buffer earlier than other per-cpu kernel buffers are handled. | |
302 | * | |
303 | * Coping can be done in two steps in case the chunk of profiling data | |
304 | * crosses the upper bound of the kernel buffer. In this case we first move | |
305 | * part of data from map->start till the upper bound and then the reminder | |
306 | * from the beginning of the kernel buffer till the end of the data chunk. | |
307 | */ | |
308 | ||
309 | if (record__comp_enabled(aio->rec)) { | |
310 | size = zstd_compress(aio->rec->session, aio->data + aio->size, | |
bf59b305 | 311 | mmap__mmap_len(map) - aio->size, |
ef781128 AB |
312 | buf, size); |
313 | } else { | |
314 | memcpy(aio->data + aio->size, buf, size); | |
315 | } | |
316 | ||
317 | if (!aio->size) { | |
318 | /* | |
319 | * Increment map->refcount to guard map->aio.data[] buffer | |
320 | * from premature deallocation because map object can be | |
321 | * released earlier than aio write request started on | |
322 | * map->aio.data[] buffer is complete. | |
323 | * | |
324 | * perf_mmap__put() is done at record__aio_complete() | |
325 | * after started aio request completion or at record__aio_push() | |
326 | * if the request failed to start. | |
327 | */ | |
e75710f0 | 328 | perf_mmap__get(&map->core); |
ef781128 AB |
329 | } |
330 | ||
331 | aio->size += size; | |
332 | ||
333 | return size; | |
334 | } | |
335 | ||
a5830532 | 336 | static int record__aio_push(struct record *rec, struct mmap *map, off_t *off) |
ef781128 AB |
337 | { |
338 | int ret, idx; | |
339 | int trace_fd = rec->session->data->file.fd; | |
340 | struct record_aio aio = { .rec = rec, .size = 0 }; | |
d3d1af6f | 341 | |
ef781128 AB |
342 | /* |
343 | * Call record__aio_sync() to wait till map->aio.data[] buffer | |
344 | * becomes available after previous aio write operation. | |
345 | */ | |
346 | ||
347 | idx = record__aio_sync(map, false); | |
348 | aio.data = map->aio.data[idx]; | |
349 | ret = perf_mmap__push(map, &aio, record__aio_pushfn); | |
350 | if (ret != 0) /* ret > 0 - no data, ret < 0 - error */ | |
351 | return ret; | |
352 | ||
353 | rec->samples++; | |
354 | ret = record__aio_write(&(map->aio.cblocks[idx]), trace_fd, aio.data, aio.size, *off); | |
d3d1af6f | 355 | if (!ret) { |
ef781128 AB |
356 | *off += aio.size; |
357 | rec->bytes_written += aio.size; | |
d3d1af6f AB |
358 | if (switch_output_size(rec)) |
359 | trigger_hit(&switch_output_trigger); | |
ef781128 AB |
360 | } else { |
361 | /* | |
362 | * Decrement map->refcount incremented in record__aio_pushfn() | |
363 | * back if record__aio_write() operation failed to start, otherwise | |
364 | * map->refcount is decremented in record__aio_complete() after | |
365 | * aio write operation finishes successfully. | |
366 | */ | |
80e53d11 | 367 | perf_mmap__put(&map->core); |
d3d1af6f AB |
368 | } |
369 | ||
370 | return ret; | |
371 | } | |
372 | ||
373 | static off_t record__aio_get_pos(int trace_fd) | |
374 | { | |
375 | return lseek(trace_fd, 0, SEEK_CUR); | |
376 | } | |
377 | ||
378 | static void record__aio_set_pos(int trace_fd, off_t pos) | |
379 | { | |
380 | lseek(trace_fd, pos, SEEK_SET); | |
381 | } | |
382 | ||
383 | static void record__aio_mmap_read_sync(struct record *rec) | |
384 | { | |
385 | int i; | |
63503dba | 386 | struct evlist *evlist = rec->evlist; |
a5830532 | 387 | struct mmap *maps = evlist->mmap; |
d3d1af6f | 388 | |
ef781128 | 389 | if (!record__aio_enabled(rec)) |
d3d1af6f AB |
390 | return; |
391 | ||
c976ee11 | 392 | for (i = 0; i < evlist->core.nr_mmaps; i++) { |
a5830532 | 393 | struct mmap *map = &maps[i]; |
d3d1af6f | 394 | |
547740f7 | 395 | if (map->core.base) |
93f20c0f | 396 | record__aio_sync(map, true); |
d3d1af6f AB |
397 | } |
398 | } | |
399 | ||
400 | static int nr_cblocks_default = 1; | |
93f20c0f | 401 | static int nr_cblocks_max = 4; |
d3d1af6f AB |
402 | |
403 | static int record__aio_parse(const struct option *opt, | |
93f20c0f | 404 | const char *str, |
d3d1af6f AB |
405 | int unset) |
406 | { | |
407 | struct record_opts *opts = (struct record_opts *)opt->value; | |
408 | ||
93f20c0f | 409 | if (unset) { |
d3d1af6f | 410 | opts->nr_cblocks = 0; |
93f20c0f AB |
411 | } else { |
412 | if (str) | |
413 | opts->nr_cblocks = strtol(str, NULL, 0); | |
414 | if (!opts->nr_cblocks) | |
415 | opts->nr_cblocks = nr_cblocks_default; | |
416 | } | |
d3d1af6f AB |
417 | |
418 | return 0; | |
419 | } | |
420 | #else /* HAVE_AIO_SUPPORT */ | |
93f20c0f AB |
421 | static int nr_cblocks_max = 0; |
422 | ||
a5830532 | 423 | static int record__aio_push(struct record *rec __maybe_unused, struct mmap *map __maybe_unused, |
ef781128 | 424 | off_t *off __maybe_unused) |
d3d1af6f AB |
425 | { |
426 | return -1; | |
427 | } | |
428 | ||
429 | static off_t record__aio_get_pos(int trace_fd __maybe_unused) | |
430 | { | |
431 | return -1; | |
432 | } | |
433 | ||
434 | static void record__aio_set_pos(int trace_fd __maybe_unused, off_t pos __maybe_unused) | |
435 | { | |
436 | } | |
437 | ||
438 | static void record__aio_mmap_read_sync(struct record *rec __maybe_unused) | |
439 | { | |
440 | } | |
441 | #endif | |
442 | ||
443 | static int record__aio_enabled(struct record *rec) | |
444 | { | |
445 | return rec->opts.nr_cblocks > 0; | |
446 | } | |
447 | ||
470530bb AB |
448 | #define MMAP_FLUSH_DEFAULT 1 |
449 | static int record__mmap_flush_parse(const struct option *opt, | |
450 | const char *str, | |
451 | int unset) | |
452 | { | |
453 | int flush_max; | |
454 | struct record_opts *opts = (struct record_opts *)opt->value; | |
455 | static struct parse_tag tags[] = { | |
456 | { .tag = 'B', .mult = 1 }, | |
457 | { .tag = 'K', .mult = 1 << 10 }, | |
458 | { .tag = 'M', .mult = 1 << 20 }, | |
459 | { .tag = 'G', .mult = 1 << 30 }, | |
460 | { .tag = 0 }, | |
461 | }; | |
462 | ||
463 | if (unset) | |
464 | return 0; | |
465 | ||
466 | if (str) { | |
467 | opts->mmap_flush = parse_tag_value(str, tags); | |
468 | if (opts->mmap_flush == (int)-1) | |
469 | opts->mmap_flush = strtol(str, NULL, 0); | |
470 | } | |
471 | ||
472 | if (!opts->mmap_flush) | |
473 | opts->mmap_flush = MMAP_FLUSH_DEFAULT; | |
474 | ||
9521b5f2 | 475 | flush_max = evlist__mmap_size(opts->mmap_pages); |
470530bb AB |
476 | flush_max /= 4; |
477 | if (opts->mmap_flush > flush_max) | |
478 | opts->mmap_flush = flush_max; | |
479 | ||
480 | return 0; | |
481 | } | |
482 | ||
504c1ad1 AB |
483 | #ifdef HAVE_ZSTD_SUPPORT |
484 | static unsigned int comp_level_default = 1; | |
485 | ||
486 | static int record__parse_comp_level(const struct option *opt, const char *str, int unset) | |
487 | { | |
488 | struct record_opts *opts = opt->value; | |
489 | ||
490 | if (unset) { | |
491 | opts->comp_level = 0; | |
492 | } else { | |
493 | if (str) | |
494 | opts->comp_level = strtol(str, NULL, 0); | |
495 | if (!opts->comp_level) | |
496 | opts->comp_level = comp_level_default; | |
497 | } | |
498 | ||
499 | return 0; | |
500 | } | |
501 | #endif | |
51255a8a AB |
502 | static unsigned int comp_level_max = 22; |
503 | ||
42e1fd80 AB |
504 | static int record__comp_enabled(struct record *rec) |
505 | { | |
506 | return rec->opts.comp_level > 0; | |
507 | } | |
508 | ||
45694aa7 | 509 | static int process_synthesized_event(struct perf_tool *tool, |
d20deb64 | 510 | union perf_event *event, |
1d037ca1 IT |
511 | struct perf_sample *sample __maybe_unused, |
512 | struct machine *machine __maybe_unused) | |
234fbbf5 | 513 | { |
8c6f45a7 | 514 | struct record *rec = container_of(tool, struct record, tool); |
ded2b8fe | 515 | return record__write(rec, NULL, event, event->header.size); |
234fbbf5 ACM |
516 | } |
517 | ||
d99c22ea SE |
518 | static int process_locked_synthesized_event(struct perf_tool *tool, |
519 | union perf_event *event, | |
520 | struct perf_sample *sample __maybe_unused, | |
521 | struct machine *machine __maybe_unused) | |
522 | { | |
523 | static pthread_mutex_t synth_lock = PTHREAD_MUTEX_INITIALIZER; | |
524 | int ret; | |
525 | ||
526 | pthread_mutex_lock(&synth_lock); | |
527 | ret = process_synthesized_event(tool, event, sample, machine); | |
528 | pthread_mutex_unlock(&synth_lock); | |
529 | return ret; | |
530 | } | |
531 | ||
a5830532 | 532 | static int record__pushfn(struct mmap *map, void *to, void *bf, size_t size) |
d37f1586 ACM |
533 | { |
534 | struct record *rec = to; | |
535 | ||
5d7f4116 | 536 | if (record__comp_enabled(rec)) { |
bf59b305 | 537 | size = zstd_compress(rec->session, map->data, mmap__mmap_len(map), bf, size); |
5d7f4116 AB |
538 | bf = map->data; |
539 | } | |
540 | ||
d37f1586 | 541 | rec->samples++; |
ded2b8fe | 542 | return record__write(rec, map, bf, size); |
d37f1586 ACM |
543 | } |
544 | ||
2dd6d8a1 AH |
545 | static volatile int signr = -1; |
546 | static volatile int child_finished; | |
da231338 AM |
547 | #ifdef HAVE_EVENTFD_SUPPORT |
548 | static int done_fd = -1; | |
549 | #endif | |
c0bdc1c4 | 550 | |
2dd6d8a1 AH |
551 | static void sig_handler(int sig) |
552 | { | |
553 | if (sig == SIGCHLD) | |
554 | child_finished = 1; | |
555 | else | |
556 | signr = sig; | |
557 | ||
558 | done = 1; | |
da231338 AM |
559 | #ifdef HAVE_EVENTFD_SUPPORT |
560 | { | |
561 | u64 tmp = 1; | |
562 | /* | |
563 | * It is possible for this signal handler to run after done is checked | |
564 | * in the main loop, but before the perf counter fds are polled. If this | |
565 | * happens, the poll() will continue to wait even though done is set, | |
566 | * and will only break out if either another signal is received, or the | |
567 | * counters are ready for read. To ensure the poll() doesn't sleep when | |
568 | * done is set, use an eventfd (done_fd) to wake up the poll(). | |
569 | */ | |
570 | if (write(done_fd, &tmp, sizeof(tmp)) < 0) | |
571 | pr_err("failed to signal wakeup fd, error: %m\n"); | |
572 | } | |
573 | #endif // HAVE_EVENTFD_SUPPORT | |
2dd6d8a1 AH |
574 | } |
575 | ||
a074865e WN |
576 | static void sigsegv_handler(int sig) |
577 | { | |
578 | perf_hooks__recover(); | |
579 | sighandler_dump_stack(sig); | |
580 | } | |
581 | ||
2dd6d8a1 AH |
582 | static void record__sig_exit(void) |
583 | { | |
584 | if (signr == -1) | |
585 | return; | |
586 | ||
587 | signal(signr, SIG_DFL); | |
588 | raise(signr); | |
589 | } | |
590 | ||
e31f0d01 AH |
591 | #ifdef HAVE_AUXTRACE_SUPPORT |
592 | ||
ef149c25 | 593 | static int record__process_auxtrace(struct perf_tool *tool, |
a5830532 | 594 | struct mmap *map, |
ef149c25 AH |
595 | union perf_event *event, void *data1, |
596 | size_t len1, void *data2, size_t len2) | |
597 | { | |
598 | struct record *rec = container_of(tool, struct record, tool); | |
8ceb41d7 | 599 | struct perf_data *data = &rec->data; |
ef149c25 AH |
600 | size_t padding; |
601 | u8 pad[8] = {0}; | |
602 | ||
46e201ef | 603 | if (!perf_data__is_pipe(data) && perf_data__is_single_file(data)) { |
99fa2984 | 604 | off_t file_offset; |
8ceb41d7 | 605 | int fd = perf_data__fd(data); |
99fa2984 AH |
606 | int err; |
607 | ||
608 | file_offset = lseek(fd, 0, SEEK_CUR); | |
609 | if (file_offset == -1) | |
610 | return -1; | |
611 | err = auxtrace_index__auxtrace_event(&rec->session->auxtrace_index, | |
612 | event, file_offset); | |
613 | if (err) | |
614 | return err; | |
615 | } | |
616 | ||
ef149c25 AH |
617 | /* event.auxtrace.size includes padding, see __auxtrace_mmap__read() */ |
618 | padding = (len1 + len2) & 7; | |
619 | if (padding) | |
620 | padding = 8 - padding; | |
621 | ||
ded2b8fe JO |
622 | record__write(rec, map, event, event->header.size); |
623 | record__write(rec, map, data1, len1); | |
ef149c25 | 624 | if (len2) |
ded2b8fe JO |
625 | record__write(rec, map, data2, len2); |
626 | record__write(rec, map, &pad, padding); | |
ef149c25 AH |
627 | |
628 | return 0; | |
629 | } | |
630 | ||
631 | static int record__auxtrace_mmap_read(struct record *rec, | |
a5830532 | 632 | struct mmap *map) |
ef149c25 AH |
633 | { |
634 | int ret; | |
635 | ||
e035f4ca | 636 | ret = auxtrace_mmap__read(map, rec->itr, &rec->tool, |
ef149c25 AH |
637 | record__process_auxtrace); |
638 | if (ret < 0) | |
639 | return ret; | |
640 | ||
641 | if (ret) | |
642 | rec->samples++; | |
643 | ||
644 | return 0; | |
645 | } | |
646 | ||
2dd6d8a1 | 647 | static int record__auxtrace_mmap_read_snapshot(struct record *rec, |
a5830532 | 648 | struct mmap *map) |
2dd6d8a1 AH |
649 | { |
650 | int ret; | |
651 | ||
e035f4ca | 652 | ret = auxtrace_mmap__read_snapshot(map, rec->itr, &rec->tool, |
2dd6d8a1 AH |
653 | record__process_auxtrace, |
654 | rec->opts.auxtrace_snapshot_size); | |
655 | if (ret < 0) | |
656 | return ret; | |
657 | ||
658 | if (ret) | |
659 | rec->samples++; | |
660 | ||
661 | return 0; | |
662 | } | |
663 | ||
664 | static int record__auxtrace_read_snapshot_all(struct record *rec) | |
665 | { | |
666 | int i; | |
667 | int rc = 0; | |
668 | ||
c976ee11 | 669 | for (i = 0; i < rec->evlist->core.nr_mmaps; i++) { |
a5830532 | 670 | struct mmap *map = &rec->evlist->mmap[i]; |
2dd6d8a1 | 671 | |
e035f4ca | 672 | if (!map->auxtrace_mmap.base) |
2dd6d8a1 AH |
673 | continue; |
674 | ||
e035f4ca | 675 | if (record__auxtrace_mmap_read_snapshot(rec, map) != 0) { |
2dd6d8a1 AH |
676 | rc = -1; |
677 | goto out; | |
678 | } | |
679 | } | |
680 | out: | |
681 | return rc; | |
682 | } | |
683 | ||
ce7b0e42 | 684 | static void record__read_auxtrace_snapshot(struct record *rec, bool on_exit) |
2dd6d8a1 AH |
685 | { |
686 | pr_debug("Recording AUX area tracing snapshot\n"); | |
687 | if (record__auxtrace_read_snapshot_all(rec) < 0) { | |
5f9cf599 | 688 | trigger_error(&auxtrace_snapshot_trigger); |
2dd6d8a1 | 689 | } else { |
ce7b0e42 | 690 | if (auxtrace_record__snapshot_finish(rec->itr, on_exit)) |
5f9cf599 WN |
691 | trigger_error(&auxtrace_snapshot_trigger); |
692 | else | |
693 | trigger_ready(&auxtrace_snapshot_trigger); | |
2dd6d8a1 AH |
694 | } |
695 | } | |
696 | ||
ce7b0e42 AS |
697 | static int record__auxtrace_snapshot_exit(struct record *rec) |
698 | { | |
699 | if (trigger_is_error(&auxtrace_snapshot_trigger)) | |
700 | return 0; | |
701 | ||
702 | if (!auxtrace_record__snapshot_started && | |
703 | auxtrace_record__snapshot_start(rec->itr)) | |
704 | return -1; | |
705 | ||
706 | record__read_auxtrace_snapshot(rec, true); | |
707 | if (trigger_is_error(&auxtrace_snapshot_trigger)) | |
708 | return -1; | |
709 | ||
710 | return 0; | |
711 | } | |
712 | ||
4b5ea3bd AH |
713 | static int record__auxtrace_init(struct record *rec) |
714 | { | |
715 | int err; | |
716 | ||
717 | if (!rec->itr) { | |
718 | rec->itr = auxtrace_record__init(rec->evlist, &err); | |
719 | if (err) | |
720 | return err; | |
721 | } | |
722 | ||
723 | err = auxtrace_parse_snapshot_options(rec->itr, &rec->opts, | |
724 | rec->opts.auxtrace_snapshot_opts); | |
725 | if (err) | |
726 | return err; | |
727 | ||
c0a6de06 AH |
728 | err = auxtrace_parse_sample_options(rec->itr, rec->evlist, &rec->opts, |
729 | rec->opts.auxtrace_sample_opts); | |
730 | if (err) | |
731 | return err; | |
732 | ||
4b5ea3bd AH |
733 | return auxtrace_parse_filters(rec->evlist); |
734 | } | |
735 | ||
e31f0d01 AH |
736 | #else |
737 | ||
738 | static inline | |
739 | int record__auxtrace_mmap_read(struct record *rec __maybe_unused, | |
a5830532 | 740 | struct mmap *map __maybe_unused) |
e31f0d01 AH |
741 | { |
742 | return 0; | |
743 | } | |
744 | ||
2dd6d8a1 | 745 | static inline |
ce7b0e42 AS |
746 | void record__read_auxtrace_snapshot(struct record *rec __maybe_unused, |
747 | bool on_exit __maybe_unused) | |
de9ac07b | 748 | { |
f7b7c26e PZ |
749 | } |
750 | ||
2dd6d8a1 AH |
751 | static inline |
752 | int auxtrace_record__snapshot_start(struct auxtrace_record *itr __maybe_unused) | |
f7b7c26e | 753 | { |
2dd6d8a1 | 754 | return 0; |
de9ac07b PZ |
755 | } |
756 | ||
ce7b0e42 AS |
757 | static inline |
758 | int record__auxtrace_snapshot_exit(struct record *rec __maybe_unused) | |
759 | { | |
760 | return 0; | |
761 | } | |
762 | ||
4b5ea3bd AH |
763 | static int record__auxtrace_init(struct record *rec __maybe_unused) |
764 | { | |
765 | return 0; | |
766 | } | |
767 | ||
2dd6d8a1 AH |
768 | #endif |
769 | ||
246eba8e AH |
770 | static int record__config_text_poke(struct evlist *evlist) |
771 | { | |
772 | struct evsel *evsel; | |
773 | int err; | |
774 | ||
775 | /* Nothing to do if text poke is already configured */ | |
776 | evlist__for_each_entry(evlist, evsel) { | |
777 | if (evsel->core.attr.text_poke) | |
778 | return 0; | |
779 | } | |
780 | ||
781 | err = parse_events(evlist, "dummy:u", NULL); | |
782 | if (err) | |
783 | return err; | |
784 | ||
785 | evsel = evlist__last(evlist); | |
786 | ||
787 | evsel->core.attr.freq = 0; | |
788 | evsel->core.attr.sample_period = 1; | |
789 | evsel->core.attr.text_poke = 1; | |
790 | evsel->core.attr.ksymbol = 1; | |
791 | ||
792 | evsel->core.system_wide = true; | |
793 | evsel->no_aux_samples = true; | |
794 | evsel->immediate = true; | |
795 | ||
796 | /* Text poke must be collected on all CPUs */ | |
797 | perf_cpu_map__put(evsel->core.own_cpus); | |
798 | evsel->core.own_cpus = perf_cpu_map__new(NULL); | |
799 | perf_cpu_map__put(evsel->core.cpus); | |
800 | evsel->core.cpus = perf_cpu_map__get(evsel->core.own_cpus); | |
801 | ||
802 | evsel__set_sample_bit(evsel, TIME); | |
803 | ||
804 | return 0; | |
805 | } | |
806 | ||
eeb399b5 AH |
807 | static bool record__kcore_readable(struct machine *machine) |
808 | { | |
809 | char kcore[PATH_MAX]; | |
810 | int fd; | |
811 | ||
812 | scnprintf(kcore, sizeof(kcore), "%s/proc/kcore", machine->root_dir); | |
813 | ||
814 | fd = open(kcore, O_RDONLY); | |
815 | if (fd < 0) | |
816 | return false; | |
817 | ||
818 | close(fd); | |
819 | ||
820 | return true; | |
821 | } | |
822 | ||
823 | static int record__kcore_copy(struct machine *machine, struct perf_data *data) | |
824 | { | |
825 | char from_dir[PATH_MAX]; | |
826 | char kcore_dir[PATH_MAX]; | |
827 | int ret; | |
828 | ||
829 | snprintf(from_dir, sizeof(from_dir), "%s/proc", machine->root_dir); | |
830 | ||
831 | ret = perf_data__make_kcore_dir(data, kcore_dir, sizeof(kcore_dir)); | |
832 | if (ret) | |
833 | return ret; | |
834 | ||
835 | return kcore_copy(from_dir, kcore_dir); | |
836 | } | |
837 | ||
cda57a8c | 838 | static int record__mmap_evlist(struct record *rec, |
63503dba | 839 | struct evlist *evlist) |
cda57a8c WN |
840 | { |
841 | struct record_opts *opts = &rec->opts; | |
c0a6de06 AH |
842 | bool auxtrace_overwrite = opts->auxtrace_snapshot_mode || |
843 | opts->auxtrace_sample_mode; | |
cda57a8c WN |
844 | char msg[512]; |
845 | ||
f13de660 AB |
846 | if (opts->affinity != PERF_AFFINITY_SYS) |
847 | cpu__setup_cpunode_map(); | |
848 | ||
9521b5f2 | 849 | if (evlist__mmap_ex(evlist, opts->mmap_pages, |
cda57a8c | 850 | opts->auxtrace_mmap_pages, |
c0a6de06 | 851 | auxtrace_overwrite, |
470530bb | 852 | opts->nr_cblocks, opts->affinity, |
51255a8a | 853 | opts->mmap_flush, opts->comp_level) < 0) { |
cda57a8c WN |
854 | if (errno == EPERM) { |
855 | pr_err("Permission error mapping pages.\n" | |
856 | "Consider increasing " | |
857 | "/proc/sys/kernel/perf_event_mlock_kb,\n" | |
858 | "or try again with a smaller value of -m/--mmap_pages.\n" | |
859 | "(current value: %u,%u)\n", | |
860 | opts->mmap_pages, opts->auxtrace_mmap_pages); | |
861 | return -errno; | |
862 | } else { | |
863 | pr_err("failed to mmap with %d (%s)\n", errno, | |
c8b5f2c9 | 864 | str_error_r(errno, msg, sizeof(msg))); |
cda57a8c WN |
865 | if (errno) |
866 | return -errno; | |
867 | else | |
868 | return -EINVAL; | |
869 | } | |
870 | } | |
871 | return 0; | |
872 | } | |
873 | ||
874 | static int record__mmap(struct record *rec) | |
875 | { | |
876 | return record__mmap_evlist(rec, rec->evlist); | |
877 | } | |
878 | ||
8c6f45a7 | 879 | static int record__open(struct record *rec) |
dd7927f4 | 880 | { |
d6195a6a | 881 | char msg[BUFSIZ]; |
32dcd021 | 882 | struct evsel *pos; |
63503dba | 883 | struct evlist *evlist = rec->evlist; |
d20deb64 | 884 | struct perf_session *session = rec->session; |
b4006796 | 885 | struct record_opts *opts = &rec->opts; |
8d3eca20 | 886 | int rc = 0; |
dd7927f4 | 887 | |
d3dbf43c | 888 | /* |
0a892c1c IR |
889 | * For initial_delay or system wide, we need to add a dummy event so |
890 | * that we can track PERF_RECORD_MMAP to cover the delay of waiting or | |
891 | * event synthesis. | |
d3dbf43c | 892 | */ |
0a892c1c | 893 | if (opts->initial_delay || target__has_cpu(&opts->target)) { |
442ad225 AH |
894 | pos = perf_evlist__get_tracking_event(evlist); |
895 | if (!evsel__is_dummy_event(pos)) { | |
896 | /* Set up dummy event. */ | |
facbf0b9 | 897 | if (evlist__add_dummy(evlist)) |
442ad225 AH |
898 | return -ENOMEM; |
899 | pos = evlist__last(evlist); | |
900 | perf_evlist__set_tracking_event(evlist, pos); | |
901 | } | |
902 | ||
0a892c1c IR |
903 | /* |
904 | * Enable the dummy event when the process is forked for | |
905 | * initial_delay, immediately for system wide. | |
906 | */ | |
442ad225 | 907 | if (opts->initial_delay && !pos->immediate) |
0a892c1c IR |
908 | pos->core.attr.enable_on_exec = 1; |
909 | else | |
910 | pos->immediate = 1; | |
d3dbf43c ACM |
911 | } |
912 | ||
e68ae9cf | 913 | perf_evlist__config(evlist, opts, &callchain_param); |
cac21425 | 914 | |
e5cadb93 | 915 | evlist__for_each_entry(evlist, pos) { |
dd7927f4 | 916 | try_again: |
af663bd0 | 917 | if (evsel__open(pos, pos->core.cpus, pos->core.threads) < 0) { |
ae430892 | 918 | if (evsel__fallback(pos, errno, msg, sizeof(msg))) { |
bb963e16 | 919 | if (verbose > 0) |
c0a54341 | 920 | ui__warning("%s\n", msg); |
d6d901c2 ZY |
921 | goto try_again; |
922 | } | |
cf99ad14 AK |
923 | if ((errno == EINVAL || errno == EBADF) && |
924 | pos->leader != pos && | |
925 | pos->weak_group) { | |
4804e011 | 926 | pos = perf_evlist__reset_weak_group(evlist, pos, true); |
cf99ad14 AK |
927 | goto try_again; |
928 | } | |
56e52e85 | 929 | rc = -errno; |
2bb72dbb | 930 | evsel__open_strerror(pos, &opts->target, errno, msg, sizeof(msg)); |
56e52e85 | 931 | ui__error("%s\n", msg); |
8d3eca20 | 932 | goto out; |
c171b552 | 933 | } |
bfd8f72c AK |
934 | |
935 | pos->supported = true; | |
c171b552 | 936 | } |
a43d3f08 | 937 | |
c8b567c8 ACM |
938 | if (symbol_conf.kptr_restrict && !perf_evlist__exclude_kernel(evlist)) { |
939 | pr_warning( | |
940 | "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n" | |
941 | "check /proc/sys/kernel/kptr_restrict and /proc/sys/kernel/perf_event_paranoid.\n\n" | |
942 | "Samples in kernel functions may not be resolved if a suitable vmlinux\n" | |
943 | "file is not found in the buildid cache or in the vmlinux path.\n\n" | |
944 | "Samples in kernel modules won't be resolved at all.\n\n" | |
945 | "If some relocation was applied (e.g. kexec) symbols may be misresolved\n" | |
946 | "even with a suitable vmlinux or kallsyms file.\n\n"); | |
947 | } | |
948 | ||
23d4aad4 | 949 | if (perf_evlist__apply_filters(evlist, &pos)) { |
62d94b00 | 950 | pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n", |
8ab2e96d | 951 | pos->filter, evsel__name(pos), errno, |
c8b5f2c9 | 952 | str_error_r(errno, msg, sizeof(msg))); |
8d3eca20 | 953 | rc = -1; |
5d8bb1ec MP |
954 | goto out; |
955 | } | |
956 | ||
cda57a8c WN |
957 | rc = record__mmap(rec); |
958 | if (rc) | |
8d3eca20 | 959 | goto out; |
0a27d7f9 | 960 | |
563aecb2 | 961 | session->evlist = evlist; |
7b56cce2 | 962 | perf_session__set_id_hdr_size(session); |
8d3eca20 DA |
963 | out: |
964 | return rc; | |
16c8a109 PZ |
965 | } |
966 | ||
e3d59112 NK |
967 | static int process_sample_event(struct perf_tool *tool, |
968 | union perf_event *event, | |
969 | struct perf_sample *sample, | |
32dcd021 | 970 | struct evsel *evsel, |
e3d59112 NK |
971 | struct machine *machine) |
972 | { | |
973 | struct record *rec = container_of(tool, struct record, tool); | |
974 | ||
68588baf JY |
975 | if (rec->evlist->first_sample_time == 0) |
976 | rec->evlist->first_sample_time = sample->time; | |
977 | ||
978 | rec->evlist->last_sample_time = sample->time; | |
e3d59112 | 979 | |
68588baf JY |
980 | if (rec->buildid_all) |
981 | return 0; | |
982 | ||
983 | rec->samples++; | |
e3d59112 NK |
984 | return build_id__mark_dso_hit(tool, event, sample, evsel, machine); |
985 | } | |
986 | ||
8c6f45a7 | 987 | static int process_buildids(struct record *rec) |
6122e4e4 | 988 | { |
f5fc1412 | 989 | struct perf_session *session = rec->session; |
6122e4e4 | 990 | |
45112e89 | 991 | if (perf_data__size(&rec->data) == 0) |
9f591fd7 ACM |
992 | return 0; |
993 | ||
00dc8657 NK |
994 | /* |
995 | * During this process, it'll load kernel map and replace the | |
996 | * dso->long_name to a real pathname it found. In this case | |
997 | * we prefer the vmlinux path like | |
998 | * /lib/modules/3.16.4/build/vmlinux | |
999 | * | |
1000 | * rather than build-id path (in debug directory). | |
1001 | * $HOME/.debug/.build-id/f0/6e17aa50adf4d00b88925e03775de107611551 | |
1002 | */ | |
1003 | symbol_conf.ignore_vmlinux_buildid = true; | |
1004 | ||
6156681b NK |
1005 | /* |
1006 | * If --buildid-all is given, it marks all DSO regardless of hits, | |
68588baf JY |
1007 | * so no need to process samples. But if timestamp_boundary is enabled, |
1008 | * it still needs to walk on all samples to get the timestamps of | |
1009 | * first/last samples. | |
6156681b | 1010 | */ |
68588baf | 1011 | if (rec->buildid_all && !rec->timestamp_boundary) |
6156681b NK |
1012 | rec->tool.sample = NULL; |
1013 | ||
b7b61cbe | 1014 | return perf_session__process_events(session); |
6122e4e4 ACM |
1015 | } |
1016 | ||
8115d60c | 1017 | static void perf_event__synthesize_guest_os(struct machine *machine, void *data) |
a1645ce1 ZY |
1018 | { |
1019 | int err; | |
45694aa7 | 1020 | struct perf_tool *tool = data; |
a1645ce1 ZY |
1021 | /* |
1022 | *As for guest kernel when processing subcommand record&report, | |
1023 | *we arrange module mmap prior to guest kernel mmap and trigger | |
1024 | *a preload dso because default guest module symbols are loaded | |
1025 | *from guest kallsyms instead of /lib/modules/XXX/XXX. This | |
1026 | *method is used to avoid symbol missing when the first addr is | |
1027 | *in module instead of in guest kernel. | |
1028 | */ | |
45694aa7 | 1029 | err = perf_event__synthesize_modules(tool, process_synthesized_event, |
743eb868 | 1030 | machine); |
a1645ce1 ZY |
1031 | if (err < 0) |
1032 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 1033 | " relocation symbol.\n", machine->pid); |
a1645ce1 | 1034 | |
a1645ce1 ZY |
1035 | /* |
1036 | * We use _stext for guest kernel because guest kernel's /proc/kallsyms | |
1037 | * have no _text sometimes. | |
1038 | */ | |
45694aa7 | 1039 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, |
0ae617be | 1040 | machine); |
a1645ce1 ZY |
1041 | if (err < 0) |
1042 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 1043 | " relocation symbol.\n", machine->pid); |
a1645ce1 ZY |
1044 | } |
1045 | ||
98402807 FW |
1046 | static struct perf_event_header finished_round_event = { |
1047 | .size = sizeof(struct perf_event_header), | |
1048 | .type = PERF_RECORD_FINISHED_ROUND, | |
1049 | }; | |
1050 | ||
a5830532 | 1051 | static void record__adjust_affinity(struct record *rec, struct mmap *map) |
f13de660 AB |
1052 | { |
1053 | if (rec->opts.affinity != PERF_AFFINITY_SYS && | |
8384a260 AB |
1054 | !bitmap_equal(rec->affinity_mask.bits, map->affinity_mask.bits, |
1055 | rec->affinity_mask.nbits)) { | |
1056 | bitmap_zero(rec->affinity_mask.bits, rec->affinity_mask.nbits); | |
1057 | bitmap_or(rec->affinity_mask.bits, rec->affinity_mask.bits, | |
1058 | map->affinity_mask.bits, rec->affinity_mask.nbits); | |
1059 | sched_setaffinity(0, MMAP_CPU_MASK_BYTES(&rec->affinity_mask), | |
1060 | (cpu_set_t *)rec->affinity_mask.bits); | |
1061 | if (verbose == 2) | |
1062 | mmap_cpu_mask__scnprintf(&rec->affinity_mask, "thread"); | |
f13de660 AB |
1063 | } |
1064 | } | |
1065 | ||
5d7f4116 AB |
1066 | static size_t process_comp_header(void *record, size_t increment) |
1067 | { | |
72932371 | 1068 | struct perf_record_compressed *event = record; |
5d7f4116 AB |
1069 | size_t size = sizeof(*event); |
1070 | ||
1071 | if (increment) { | |
1072 | event->header.size += increment; | |
1073 | return increment; | |
1074 | } | |
1075 | ||
1076 | event->header.type = PERF_RECORD_COMPRESSED; | |
1077 | event->header.size = size; | |
1078 | ||
1079 | return size; | |
1080 | } | |
1081 | ||
1082 | static size_t zstd_compress(struct perf_session *session, void *dst, size_t dst_size, | |
1083 | void *src, size_t src_size) | |
1084 | { | |
1085 | size_t compressed; | |
72932371 | 1086 | size_t max_record_size = PERF_SAMPLE_MAX_SIZE - sizeof(struct perf_record_compressed) - 1; |
5d7f4116 AB |
1087 | |
1088 | compressed = zstd_compress_stream_to_records(&session->zstd_data, dst, dst_size, src, src_size, | |
1089 | max_record_size, process_comp_header); | |
1090 | ||
1091 | session->bytes_transferred += src_size; | |
1092 | session->bytes_compressed += compressed; | |
1093 | ||
1094 | return compressed; | |
1095 | } | |
1096 | ||
63503dba | 1097 | static int record__mmap_read_evlist(struct record *rec, struct evlist *evlist, |
470530bb | 1098 | bool overwrite, bool synch) |
98402807 | 1099 | { |
dcabb507 | 1100 | u64 bytes_written = rec->bytes_written; |
0e2e63dd | 1101 | int i; |
8d3eca20 | 1102 | int rc = 0; |
a5830532 | 1103 | struct mmap *maps; |
d3d1af6f | 1104 | int trace_fd = rec->data.file.fd; |
ef781128 | 1105 | off_t off = 0; |
98402807 | 1106 | |
cb21686b WN |
1107 | if (!evlist) |
1108 | return 0; | |
ef149c25 | 1109 | |
0b72d69a | 1110 | maps = overwrite ? evlist->overwrite_mmap : evlist->mmap; |
a4ea0ec4 WN |
1111 | if (!maps) |
1112 | return 0; | |
1113 | ||
0b72d69a | 1114 | if (overwrite && evlist->bkw_mmap_state != BKW_MMAP_DATA_PENDING) |
54cc54de WN |
1115 | return 0; |
1116 | ||
d3d1af6f AB |
1117 | if (record__aio_enabled(rec)) |
1118 | off = record__aio_get_pos(trace_fd); | |
1119 | ||
c976ee11 | 1120 | for (i = 0; i < evlist->core.nr_mmaps; i++) { |
470530bb | 1121 | u64 flush = 0; |
a5830532 | 1122 | struct mmap *map = &maps[i]; |
cb21686b | 1123 | |
547740f7 | 1124 | if (map->core.base) { |
f13de660 | 1125 | record__adjust_affinity(rec, map); |
470530bb | 1126 | if (synch) { |
65aa2e6b JO |
1127 | flush = map->core.flush; |
1128 | map->core.flush = 1; | |
470530bb | 1129 | } |
d3d1af6f | 1130 | if (!record__aio_enabled(rec)) { |
ef781128 | 1131 | if (perf_mmap__push(map, rec, record__pushfn) < 0) { |
470530bb | 1132 | if (synch) |
65aa2e6b | 1133 | map->core.flush = flush; |
d3d1af6f AB |
1134 | rc = -1; |
1135 | goto out; | |
1136 | } | |
1137 | } else { | |
ef781128 | 1138 | if (record__aio_push(rec, map, &off) < 0) { |
d3d1af6f | 1139 | record__aio_set_pos(trace_fd, off); |
470530bb | 1140 | if (synch) |
65aa2e6b | 1141 | map->core.flush = flush; |
d3d1af6f AB |
1142 | rc = -1; |
1143 | goto out; | |
1144 | } | |
8d3eca20 | 1145 | } |
470530bb | 1146 | if (synch) |
65aa2e6b | 1147 | map->core.flush = flush; |
8d3eca20 | 1148 | } |
ef149c25 | 1149 | |
e035f4ca | 1150 | if (map->auxtrace_mmap.base && !rec->opts.auxtrace_snapshot_mode && |
c0a6de06 | 1151 | !rec->opts.auxtrace_sample_mode && |
e035f4ca | 1152 | record__auxtrace_mmap_read(rec, map) != 0) { |
ef149c25 AH |
1153 | rc = -1; |
1154 | goto out; | |
1155 | } | |
98402807 FW |
1156 | } |
1157 | ||
d3d1af6f AB |
1158 | if (record__aio_enabled(rec)) |
1159 | record__aio_set_pos(trace_fd, off); | |
1160 | ||
dcabb507 JO |
1161 | /* |
1162 | * Mark the round finished in case we wrote | |
1163 | * at least one event. | |
1164 | */ | |
1165 | if (bytes_written != rec->bytes_written) | |
ded2b8fe | 1166 | rc = record__write(rec, NULL, &finished_round_event, sizeof(finished_round_event)); |
8d3eca20 | 1167 | |
0b72d69a | 1168 | if (overwrite) |
54cc54de | 1169 | perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY); |
8d3eca20 DA |
1170 | out: |
1171 | return rc; | |
98402807 FW |
1172 | } |
1173 | ||
470530bb | 1174 | static int record__mmap_read_all(struct record *rec, bool synch) |
cb21686b WN |
1175 | { |
1176 | int err; | |
1177 | ||
470530bb | 1178 | err = record__mmap_read_evlist(rec, rec->evlist, false, synch); |
cb21686b WN |
1179 | if (err) |
1180 | return err; | |
1181 | ||
470530bb | 1182 | return record__mmap_read_evlist(rec, rec->evlist, true, synch); |
cb21686b WN |
1183 | } |
1184 | ||
8c6f45a7 | 1185 | static void record__init_features(struct record *rec) |
57706abc | 1186 | { |
57706abc DA |
1187 | struct perf_session *session = rec->session; |
1188 | int feat; | |
1189 | ||
1190 | for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++) | |
1191 | perf_header__set_feat(&session->header, feat); | |
1192 | ||
1193 | if (rec->no_buildid) | |
1194 | perf_header__clear_feat(&session->header, HEADER_BUILD_ID); | |
1195 | ||
ce9036a6 | 1196 | if (!have_tracepoints(&rec->evlist->core.entries)) |
57706abc DA |
1197 | perf_header__clear_feat(&session->header, HEADER_TRACING_DATA); |
1198 | ||
1199 | if (!rec->opts.branch_stack) | |
1200 | perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK); | |
ef149c25 AH |
1201 | |
1202 | if (!rec->opts.full_auxtrace) | |
1203 | perf_header__clear_feat(&session->header, HEADER_AUXTRACE); | |
ffa517ad | 1204 | |
cf790516 AB |
1205 | if (!(rec->opts.use_clockid && rec->opts.clockid_res_ns)) |
1206 | perf_header__clear_feat(&session->header, HEADER_CLOCKID); | |
1207 | ||
d1e325cf JO |
1208 | if (!rec->opts.use_clockid) |
1209 | perf_header__clear_feat(&session->header, HEADER_CLOCK_DATA); | |
1210 | ||
258031c0 | 1211 | perf_header__clear_feat(&session->header, HEADER_DIR_FORMAT); |
42e1fd80 AB |
1212 | if (!record__comp_enabled(rec)) |
1213 | perf_header__clear_feat(&session->header, HEADER_COMPRESSED); | |
258031c0 | 1214 | |
ffa517ad | 1215 | perf_header__clear_feat(&session->header, HEADER_STAT); |
57706abc DA |
1216 | } |
1217 | ||
e1ab48ba WN |
1218 | static void |
1219 | record__finish_output(struct record *rec) | |
1220 | { | |
8ceb41d7 JO |
1221 | struct perf_data *data = &rec->data; |
1222 | int fd = perf_data__fd(data); | |
e1ab48ba | 1223 | |
8ceb41d7 | 1224 | if (data->is_pipe) |
e1ab48ba WN |
1225 | return; |
1226 | ||
1227 | rec->session->header.data_size += rec->bytes_written; | |
45112e89 | 1228 | data->file.size = lseek(perf_data__fd(data), 0, SEEK_CUR); |
e1ab48ba WN |
1229 | |
1230 | if (!rec->no_buildid) { | |
1231 | process_buildids(rec); | |
1232 | ||
1233 | if (rec->buildid_all) | |
1234 | dsos__hit_all(rec->session); | |
1235 | } | |
1236 | perf_session__write_header(rec->session, rec->evlist, fd, true); | |
1237 | ||
1238 | return; | |
1239 | } | |
1240 | ||
4ea648ae | 1241 | static int record__synthesize_workload(struct record *rec, bool tail) |
be7b0c9e | 1242 | { |
9d6aae72 | 1243 | int err; |
9749b90e | 1244 | struct perf_thread_map *thread_map; |
be7b0c9e | 1245 | |
4ea648ae WN |
1246 | if (rec->opts.tail_synthesize != tail) |
1247 | return 0; | |
1248 | ||
9d6aae72 ACM |
1249 | thread_map = thread_map__new_by_tid(rec->evlist->workload.pid); |
1250 | if (thread_map == NULL) | |
1251 | return -1; | |
1252 | ||
1253 | err = perf_event__synthesize_thread_map(&rec->tool, thread_map, | |
be7b0c9e WN |
1254 | process_synthesized_event, |
1255 | &rec->session->machines.host, | |
3fcb10e4 | 1256 | rec->opts.sample_address); |
7836e52e | 1257 | perf_thread_map__put(thread_map); |
9d6aae72 | 1258 | return err; |
be7b0c9e WN |
1259 | } |
1260 | ||
4ea648ae | 1261 | static int record__synthesize(struct record *rec, bool tail); |
3c1cb7e3 | 1262 | |
ecfd7a9c WN |
1263 | static int |
1264 | record__switch_output(struct record *rec, bool at_exit) | |
1265 | { | |
8ceb41d7 | 1266 | struct perf_data *data = &rec->data; |
ecfd7a9c | 1267 | int fd, err; |
03724b2e | 1268 | char *new_filename; |
ecfd7a9c WN |
1269 | |
1270 | /* Same Size: "2015122520103046"*/ | |
1271 | char timestamp[] = "InvalidTimestamp"; | |
1272 | ||
d3d1af6f AB |
1273 | record__aio_mmap_read_sync(rec); |
1274 | ||
4ea648ae WN |
1275 | record__synthesize(rec, true); |
1276 | if (target__none(&rec->opts.target)) | |
1277 | record__synthesize_workload(rec, true); | |
1278 | ||
ecfd7a9c WN |
1279 | rec->samples = 0; |
1280 | record__finish_output(rec); | |
1281 | err = fetch_current_timestamp(timestamp, sizeof(timestamp)); | |
1282 | if (err) { | |
1283 | pr_err("Failed to get current timestamp\n"); | |
1284 | return -EINVAL; | |
1285 | } | |
1286 | ||
8ceb41d7 | 1287 | fd = perf_data__switch(data, timestamp, |
ecfd7a9c | 1288 | rec->session->header.data_offset, |
03724b2e | 1289 | at_exit, &new_filename); |
ecfd7a9c WN |
1290 | if (fd >= 0 && !at_exit) { |
1291 | rec->bytes_written = 0; | |
1292 | rec->session->header.data_size = 0; | |
1293 | } | |
1294 | ||
1295 | if (!quiet) | |
1296 | fprintf(stderr, "[ perf record: Dump %s.%s ]\n", | |
2d4f2799 | 1297 | data->path, timestamp); |
3c1cb7e3 | 1298 | |
03724b2e AK |
1299 | if (rec->switch_output.num_files) { |
1300 | int n = rec->switch_output.cur_file + 1; | |
1301 | ||
1302 | if (n >= rec->switch_output.num_files) | |
1303 | n = 0; | |
1304 | rec->switch_output.cur_file = n; | |
1305 | if (rec->switch_output.filenames[n]) { | |
1306 | remove(rec->switch_output.filenames[n]); | |
d8f9da24 | 1307 | zfree(&rec->switch_output.filenames[n]); |
03724b2e AK |
1308 | } |
1309 | rec->switch_output.filenames[n] = new_filename; | |
1310 | } else { | |
1311 | free(new_filename); | |
1312 | } | |
1313 | ||
3c1cb7e3 | 1314 | /* Output tracking events */ |
be7b0c9e | 1315 | if (!at_exit) { |
4ea648ae | 1316 | record__synthesize(rec, false); |
3c1cb7e3 | 1317 | |
be7b0c9e WN |
1318 | /* |
1319 | * In 'perf record --switch-output' without -a, | |
1320 | * record__synthesize() in record__switch_output() won't | |
1321 | * generate tracking events because there's no thread_map | |
1322 | * in evlist. Which causes newly created perf.data doesn't | |
1323 | * contain map and comm information. | |
1324 | * Create a fake thread_map and directly call | |
1325 | * perf_event__synthesize_thread_map() for those events. | |
1326 | */ | |
1327 | if (target__none(&rec->opts.target)) | |
4ea648ae | 1328 | record__synthesize_workload(rec, false); |
be7b0c9e | 1329 | } |
ecfd7a9c WN |
1330 | return fd; |
1331 | } | |
1332 | ||
f33cbe72 ACM |
1333 | static volatile int workload_exec_errno; |
1334 | ||
1335 | /* | |
1336 | * perf_evlist__prepare_workload will send a SIGUSR1 | |
1337 | * if the fork fails, since we asked by setting its | |
1338 | * want_signal to true. | |
1339 | */ | |
45604710 NK |
1340 | static void workload_exec_failed_signal(int signo __maybe_unused, |
1341 | siginfo_t *info, | |
f33cbe72 ACM |
1342 | void *ucontext __maybe_unused) |
1343 | { | |
1344 | workload_exec_errno = info->si_value.sival_int; | |
1345 | done = 1; | |
f33cbe72 ACM |
1346 | child_finished = 1; |
1347 | } | |
1348 | ||
2dd6d8a1 | 1349 | static void snapshot_sig_handler(int sig); |
bfacbe3b | 1350 | static void alarm_sig_handler(int sig); |
2dd6d8a1 | 1351 | |
ee667f94 | 1352 | static const struct perf_event_mmap_page * |
63503dba | 1353 | perf_evlist__pick_pc(struct evlist *evlist) |
ee667f94 | 1354 | { |
b2cb615d | 1355 | if (evlist) { |
547740f7 JO |
1356 | if (evlist->mmap && evlist->mmap[0].core.base) |
1357 | return evlist->mmap[0].core.base; | |
1358 | if (evlist->overwrite_mmap && evlist->overwrite_mmap[0].core.base) | |
1359 | return evlist->overwrite_mmap[0].core.base; | |
b2cb615d | 1360 | } |
ee667f94 WN |
1361 | return NULL; |
1362 | } | |
1363 | ||
c45628b0 WN |
1364 | static const struct perf_event_mmap_page *record__pick_pc(struct record *rec) |
1365 | { | |
ee667f94 WN |
1366 | const struct perf_event_mmap_page *pc; |
1367 | ||
1368 | pc = perf_evlist__pick_pc(rec->evlist); | |
1369 | if (pc) | |
1370 | return pc; | |
c45628b0 WN |
1371 | return NULL; |
1372 | } | |
1373 | ||
4ea648ae | 1374 | static int record__synthesize(struct record *rec, bool tail) |
c45c86eb WN |
1375 | { |
1376 | struct perf_session *session = rec->session; | |
1377 | struct machine *machine = &session->machines.host; | |
8ceb41d7 | 1378 | struct perf_data *data = &rec->data; |
c45c86eb WN |
1379 | struct record_opts *opts = &rec->opts; |
1380 | struct perf_tool *tool = &rec->tool; | |
8ceb41d7 | 1381 | int fd = perf_data__fd(data); |
c45c86eb | 1382 | int err = 0; |
d99c22ea | 1383 | event_op f = process_synthesized_event; |
c45c86eb | 1384 | |
4ea648ae WN |
1385 | if (rec->opts.tail_synthesize != tail) |
1386 | return 0; | |
1387 | ||
8ceb41d7 | 1388 | if (data->is_pipe) { |
a2015516 JO |
1389 | /* |
1390 | * We need to synthesize events first, because some | |
1391 | * features works on top of them (on report side). | |
1392 | */ | |
318ec184 | 1393 | err = perf_event__synthesize_attrs(tool, rec->evlist, |
c45c86eb WN |
1394 | process_synthesized_event); |
1395 | if (err < 0) { | |
1396 | pr_err("Couldn't synthesize attrs.\n"); | |
1397 | goto out; | |
1398 | } | |
1399 | ||
a2015516 JO |
1400 | err = perf_event__synthesize_features(tool, session, rec->evlist, |
1401 | process_synthesized_event); | |
1402 | if (err < 0) { | |
1403 | pr_err("Couldn't synthesize features.\n"); | |
1404 | return err; | |
1405 | } | |
1406 | ||
ce9036a6 | 1407 | if (have_tracepoints(&rec->evlist->core.entries)) { |
c45c86eb WN |
1408 | /* |
1409 | * FIXME err <= 0 here actually means that | |
1410 | * there were no tracepoints so its not really | |
1411 | * an error, just that we don't need to | |
1412 | * synthesize anything. We really have to | |
1413 | * return this more properly and also | |
1414 | * propagate errors that now are calling die() | |
1415 | */ | |
1416 | err = perf_event__synthesize_tracing_data(tool, fd, rec->evlist, | |
1417 | process_synthesized_event); | |
1418 | if (err <= 0) { | |
1419 | pr_err("Couldn't record tracing data.\n"); | |
1420 | goto out; | |
1421 | } | |
1422 | rec->bytes_written += err; | |
1423 | } | |
1424 | } | |
1425 | ||
c45628b0 | 1426 | err = perf_event__synth_time_conv(record__pick_pc(rec), tool, |
46bc29b9 AH |
1427 | process_synthesized_event, machine); |
1428 | if (err) | |
1429 | goto out; | |
1430 | ||
c0a6de06 AH |
1431 | /* Synthesize id_index before auxtrace_info */ |
1432 | if (rec->opts.auxtrace_sample_mode) { | |
1433 | err = perf_event__synthesize_id_index(tool, | |
1434 | process_synthesized_event, | |
1435 | session->evlist, machine); | |
1436 | if (err) | |
1437 | goto out; | |
1438 | } | |
1439 | ||
c45c86eb WN |
1440 | if (rec->opts.full_auxtrace) { |
1441 | err = perf_event__synthesize_auxtrace_info(rec->itr, tool, | |
1442 | session, process_synthesized_event); | |
1443 | if (err) | |
1444 | goto out; | |
1445 | } | |
1446 | ||
6c443954 ACM |
1447 | if (!perf_evlist__exclude_kernel(rec->evlist)) { |
1448 | err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event, | |
1449 | machine); | |
1450 | WARN_ONCE(err < 0, "Couldn't record kernel reference relocation symbol\n" | |
1451 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
1452 | "Check /proc/kallsyms permission or run as root.\n"); | |
1453 | ||
1454 | err = perf_event__synthesize_modules(tool, process_synthesized_event, | |
1455 | machine); | |
1456 | WARN_ONCE(err < 0, "Couldn't record kernel module information.\n" | |
1457 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
1458 | "Check /proc/modules permission or run as root.\n"); | |
1459 | } | |
c45c86eb WN |
1460 | |
1461 | if (perf_guest) { | |
1462 | machines__process_guests(&session->machines, | |
1463 | perf_event__synthesize_guest_os, tool); | |
1464 | } | |
1465 | ||
bfd8f72c AK |
1466 | err = perf_event__synthesize_extra_attr(&rec->tool, |
1467 | rec->evlist, | |
1468 | process_synthesized_event, | |
1469 | data->is_pipe); | |
1470 | if (err) | |
1471 | goto out; | |
1472 | ||
03617c22 | 1473 | err = perf_event__synthesize_thread_map2(&rec->tool, rec->evlist->core.threads, |
373565d2 AK |
1474 | process_synthesized_event, |
1475 | NULL); | |
1476 | if (err < 0) { | |
1477 | pr_err("Couldn't synthesize thread map.\n"); | |
1478 | return err; | |
1479 | } | |
1480 | ||
f72f901d | 1481 | err = perf_event__synthesize_cpu_map(&rec->tool, rec->evlist->core.cpus, |
373565d2 AK |
1482 | process_synthesized_event, NULL); |
1483 | if (err < 0) { | |
1484 | pr_err("Couldn't synthesize cpu map.\n"); | |
1485 | return err; | |
1486 | } | |
1487 | ||
e5416950 | 1488 | err = perf_event__synthesize_bpf_events(session, process_synthesized_event, |
7b612e29 SL |
1489 | machine, opts); |
1490 | if (err < 0) | |
1491 | pr_warning("Couldn't synthesize bpf events.\n"); | |
1492 | ||
ab64069f NK |
1493 | err = perf_event__synthesize_cgroups(tool, process_synthesized_event, |
1494 | machine); | |
1495 | if (err < 0) | |
1496 | pr_warning("Couldn't synthesize cgroup events.\n"); | |
1497 | ||
d99c22ea SE |
1498 | if (rec->opts.nr_threads_synthesize > 1) { |
1499 | perf_set_multithreaded(); | |
1500 | f = process_locked_synthesized_event; | |
1501 | } | |
1502 | ||
03617c22 | 1503 | err = __machine__synthesize_threads(machine, tool, &opts->target, rec->evlist->core.threads, |
d99c22ea SE |
1504 | f, opts->sample_address, |
1505 | rec->opts.nr_threads_synthesize); | |
1506 | ||
1507 | if (rec->opts.nr_threads_synthesize > 1) | |
1508 | perf_set_singlethreaded(); | |
1509 | ||
c45c86eb WN |
1510 | out: |
1511 | return err; | |
1512 | } | |
1513 | ||
899e5ffb ACM |
1514 | static int record__process_signal_event(union perf_event *event __maybe_unused, void *data) |
1515 | { | |
1516 | struct record *rec = data; | |
1517 | pthread_kill(rec->thread_id, SIGUSR2); | |
1518 | return 0; | |
1519 | } | |
1520 | ||
23cbb41c ACM |
1521 | static int record__setup_sb_evlist(struct record *rec) |
1522 | { | |
1523 | struct record_opts *opts = &rec->opts; | |
1524 | ||
1525 | if (rec->sb_evlist != NULL) { | |
1526 | /* | |
1527 | * We get here if --switch-output-event populated the | |
1528 | * sb_evlist, so associate a callback that will send a SIGUSR2 | |
1529 | * to the main thread. | |
1530 | */ | |
1531 | evlist__set_cb(rec->sb_evlist, record__process_signal_event, rec); | |
1532 | rec->thread_id = pthread_self(); | |
1533 | } | |
1101c872 | 1534 | #ifdef HAVE_LIBBPF_SUPPORT |
23cbb41c ACM |
1535 | if (!opts->no_bpf_event) { |
1536 | if (rec->sb_evlist == NULL) { | |
1537 | rec->sb_evlist = evlist__new(); | |
1538 | ||
1539 | if (rec->sb_evlist == NULL) { | |
1540 | pr_err("Couldn't create side band evlist.\n."); | |
1541 | return -1; | |
1542 | } | |
1543 | } | |
1544 | ||
1545 | if (evlist__add_bpf_sb_event(rec->sb_evlist, &rec->session->header.env)) { | |
1546 | pr_err("Couldn't ask for PERF_RECORD_BPF_EVENT side band events.\n."); | |
1547 | return -1; | |
1548 | } | |
1549 | } | |
1101c872 | 1550 | #endif |
23cbb41c ACM |
1551 | if (perf_evlist__start_sb_thread(rec->sb_evlist, &rec->opts.target)) { |
1552 | pr_debug("Couldn't start the BPF side band thread:\nBPF programs starting from now on won't be annotatable\n"); | |
1553 | opts->no_bpf_event = true; | |
1554 | } | |
1555 | ||
1556 | return 0; | |
1557 | } | |
1558 | ||
d1e325cf JO |
1559 | static int record__init_clock(struct record *rec) |
1560 | { | |
1561 | struct perf_session *session = rec->session; | |
1562 | struct timespec ref_clockid; | |
1563 | struct timeval ref_tod; | |
1564 | u64 ref; | |
1565 | ||
1566 | if (!rec->opts.use_clockid) | |
1567 | return 0; | |
1568 | ||
9d88a1a1 JO |
1569 | if (rec->opts.use_clockid && rec->opts.clockid_res_ns) |
1570 | session->header.env.clock.clockid_res_ns = rec->opts.clockid_res_ns; | |
1571 | ||
d1e325cf JO |
1572 | session->header.env.clock.clockid = rec->opts.clockid; |
1573 | ||
1574 | if (gettimeofday(&ref_tod, NULL) != 0) { | |
1575 | pr_err("gettimeofday failed, cannot set reference time.\n"); | |
1576 | return -1; | |
1577 | } | |
1578 | ||
1579 | if (clock_gettime(rec->opts.clockid, &ref_clockid)) { | |
1580 | pr_err("clock_gettime failed, cannot set reference time.\n"); | |
1581 | return -1; | |
1582 | } | |
1583 | ||
1584 | ref = (u64) ref_tod.tv_sec * NSEC_PER_SEC + | |
1585 | (u64) ref_tod.tv_usec * NSEC_PER_USEC; | |
1586 | ||
1587 | session->header.env.clock.tod_ns = ref; | |
1588 | ||
1589 | ref = (u64) ref_clockid.tv_sec * NSEC_PER_SEC + | |
1590 | (u64) ref_clockid.tv_nsec; | |
1591 | ||
1592 | session->header.env.clock.clockid_ns = ref; | |
1593 | return 0; | |
1594 | } | |
1595 | ||
8c6f45a7 | 1596 | static int __cmd_record(struct record *rec, int argc, const char **argv) |
16c8a109 | 1597 | { |
57706abc | 1598 | int err; |
45604710 | 1599 | int status = 0; |
8b412664 | 1600 | unsigned long waking = 0; |
46be604b | 1601 | const bool forks = argc > 0; |
45694aa7 | 1602 | struct perf_tool *tool = &rec->tool; |
b4006796 | 1603 | struct record_opts *opts = &rec->opts; |
8ceb41d7 | 1604 | struct perf_data *data = &rec->data; |
d20deb64 | 1605 | struct perf_session *session; |
6dcf45ef | 1606 | bool disabled = false, draining = false; |
42aa276f | 1607 | int fd; |
d3c8c08e | 1608 | float ratio = 0; |
acce0223 | 1609 | enum evlist_ctl_cmd cmd = EVLIST_CTL_CMD_UNSUPPORTED; |
de9ac07b | 1610 | |
45604710 | 1611 | atexit(record__sig_exit); |
f5970550 PZ |
1612 | signal(SIGCHLD, sig_handler); |
1613 | signal(SIGINT, sig_handler); | |
804f7ac7 | 1614 | signal(SIGTERM, sig_handler); |
a074865e | 1615 | signal(SIGSEGV, sigsegv_handler); |
c0bdc1c4 | 1616 | |
f3b3614a HB |
1617 | if (rec->opts.record_namespaces) |
1618 | tool->namespace_events = true; | |
1619 | ||
8fb4b679 NK |
1620 | if (rec->opts.record_cgroup) { |
1621 | #ifdef HAVE_FILE_HANDLE | |
1622 | tool->cgroup_events = true; | |
1623 | #else | |
1624 | pr_err("cgroup tracking is not supported\n"); | |
1625 | return -1; | |
1626 | #endif | |
1627 | } | |
1628 | ||
dc0c6127 | 1629 | if (rec->opts.auxtrace_snapshot_mode || rec->switch_output.enabled) { |
2dd6d8a1 | 1630 | signal(SIGUSR2, snapshot_sig_handler); |
3c1cb7e3 WN |
1631 | if (rec->opts.auxtrace_snapshot_mode) |
1632 | trigger_on(&auxtrace_snapshot_trigger); | |
dc0c6127 | 1633 | if (rec->switch_output.enabled) |
3c1cb7e3 | 1634 | trigger_on(&switch_output_trigger); |
c0bdc1c4 | 1635 | } else { |
2dd6d8a1 | 1636 | signal(SIGUSR2, SIG_IGN); |
c0bdc1c4 | 1637 | } |
f5970550 | 1638 | |
8ceb41d7 | 1639 | session = perf_session__new(data, false, tool); |
6ef81c55 | 1640 | if (IS_ERR(session)) { |
ffa91880 | 1641 | pr_err("Perf session creation failed.\n"); |
6ef81c55 | 1642 | return PTR_ERR(session); |
a9a70bbc ACM |
1643 | } |
1644 | ||
8ceb41d7 | 1645 | fd = perf_data__fd(data); |
d20deb64 ACM |
1646 | rec->session = session; |
1647 | ||
5d7f4116 AB |
1648 | if (zstd_init(&session->zstd_data, rec->opts.comp_level) < 0) { |
1649 | pr_err("Compression initialization failed.\n"); | |
1650 | return -1; | |
1651 | } | |
da231338 AM |
1652 | #ifdef HAVE_EVENTFD_SUPPORT |
1653 | done_fd = eventfd(0, EFD_NONBLOCK); | |
1654 | if (done_fd < 0) { | |
1655 | pr_err("Failed to create wakeup eventfd, error: %m\n"); | |
1656 | status = -1; | |
1657 | goto out_delete_session; | |
1658 | } | |
1659 | err = evlist__add_pollfd(rec->evlist, done_fd); | |
1660 | if (err < 0) { | |
1661 | pr_err("Failed to add wakeup eventfd to poll list\n"); | |
1662 | status = err; | |
1663 | goto out_delete_session; | |
1664 | } | |
1665 | #endif // HAVE_EVENTFD_SUPPORT | |
5d7f4116 AB |
1666 | |
1667 | session->header.env.comp_type = PERF_COMP_ZSTD; | |
1668 | session->header.env.comp_level = rec->opts.comp_level; | |
1669 | ||
eeb399b5 AH |
1670 | if (rec->opts.kcore && |
1671 | !record__kcore_readable(&session->machines.host)) { | |
1672 | pr_err("ERROR: kcore is not readable.\n"); | |
1673 | return -1; | |
1674 | } | |
1675 | ||
d1e325cf JO |
1676 | if (record__init_clock(rec)) |
1677 | return -1; | |
1678 | ||
8c6f45a7 | 1679 | record__init_features(rec); |
330aa675 | 1680 | |
d4db3f16 | 1681 | if (forks) { |
3e2be2da | 1682 | err = perf_evlist__prepare_workload(rec->evlist, &opts->target, |
8ceb41d7 | 1683 | argv, data->is_pipe, |
735f7e0b | 1684 | workload_exec_failed_signal); |
35b9d88e ACM |
1685 | if (err < 0) { |
1686 | pr_err("Couldn't run the workload!\n"); | |
45604710 | 1687 | status = err; |
35b9d88e | 1688 | goto out_delete_session; |
856e9660 | 1689 | } |
856e9660 PZ |
1690 | } |
1691 | ||
ad46e48c JO |
1692 | /* |
1693 | * If we have just single event and are sending data | |
1694 | * through pipe, we need to force the ids allocation, | |
1695 | * because we synthesize event name through the pipe | |
1696 | * and need the id for that. | |
1697 | */ | |
6484d2f9 | 1698 | if (data->is_pipe && rec->evlist->core.nr_entries == 1) |
ad46e48c JO |
1699 | rec->opts.sample_id = true; |
1700 | ||
8c6f45a7 | 1701 | if (record__open(rec) != 0) { |
8d3eca20 | 1702 | err = -1; |
45604710 | 1703 | goto out_child; |
8d3eca20 | 1704 | } |
f6fa4375 | 1705 | session->header.env.comp_mmap_len = session->evlist->core.mmap_len; |
de9ac07b | 1706 | |
eeb399b5 AH |
1707 | if (rec->opts.kcore) { |
1708 | err = record__kcore_copy(&session->machines.host, data); | |
1709 | if (err) { | |
1710 | pr_err("ERROR: Failed to copy kcore\n"); | |
1711 | goto out_child; | |
1712 | } | |
1713 | } | |
1714 | ||
8690a2a7 WN |
1715 | err = bpf__apply_obj_config(); |
1716 | if (err) { | |
1717 | char errbuf[BUFSIZ]; | |
1718 | ||
1719 | bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf)); | |
1720 | pr_err("ERROR: Apply config to BPF failed: %s\n", | |
1721 | errbuf); | |
1722 | goto out_child; | |
1723 | } | |
1724 | ||
cca8482c AH |
1725 | /* |
1726 | * Normally perf_session__new would do this, but it doesn't have the | |
1727 | * evlist. | |
1728 | */ | |
8cedf3a5 | 1729 | if (rec->tool.ordered_events && !evlist__sample_id_all(rec->evlist)) { |
cca8482c AH |
1730 | pr_warning("WARNING: No sample_id_all support, falling back to unordered processing\n"); |
1731 | rec->tool.ordered_events = false; | |
1732 | } | |
1733 | ||
3e2be2da | 1734 | if (!rec->evlist->nr_groups) |
a8bb559b NK |
1735 | perf_header__clear_feat(&session->header, HEADER_GROUP_DESC); |
1736 | ||
8ceb41d7 | 1737 | if (data->is_pipe) { |
42aa276f | 1738 | err = perf_header__write_pipe(fd); |
529870e3 | 1739 | if (err < 0) |
45604710 | 1740 | goto out_child; |
563aecb2 | 1741 | } else { |
42aa276f | 1742 | err = perf_session__write_header(session, rec->evlist, fd, false); |
d5eed904 | 1743 | if (err < 0) |
45604710 | 1744 | goto out_child; |
56b03f3c ACM |
1745 | } |
1746 | ||
b38d85ef | 1747 | err = -1; |
d3665498 | 1748 | if (!rec->no_buildid |
e20960c0 | 1749 | && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) { |
d3665498 | 1750 | pr_err("Couldn't generate buildids. " |
e20960c0 | 1751 | "Use --no-buildid to profile anyway.\n"); |
45604710 | 1752 | goto out_child; |
e20960c0 RR |
1753 | } |
1754 | ||
23cbb41c ACM |
1755 | err = record__setup_sb_evlist(rec); |
1756 | if (err) | |
1757 | goto out_child; | |
657ee553 | 1758 | |
4ea648ae | 1759 | err = record__synthesize(rec, false); |
c45c86eb | 1760 | if (err < 0) |
45604710 | 1761 | goto out_child; |
8d3eca20 | 1762 | |
d20deb64 | 1763 | if (rec->realtime_prio) { |
de9ac07b PZ |
1764 | struct sched_param param; |
1765 | ||
d20deb64 | 1766 | param.sched_priority = rec->realtime_prio; |
de9ac07b | 1767 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { |
6beba7ad | 1768 | pr_err("Could not set realtime priority.\n"); |
8d3eca20 | 1769 | err = -1; |
45604710 | 1770 | goto out_child; |
de9ac07b PZ |
1771 | } |
1772 | } | |
1773 | ||
774cb499 JO |
1774 | /* |
1775 | * When perf is starting the traced process, all the events | |
1776 | * (apart from group members) have enable_on_exec=1 set, | |
1777 | * so don't spoil it by prematurely enabling them. | |
1778 | */ | |
6619a53e | 1779 | if (!target__none(&opts->target) && !opts->initial_delay) |
1c87f165 | 1780 | evlist__enable(rec->evlist); |
764e16a3 | 1781 | |
856e9660 PZ |
1782 | /* |
1783 | * Let the child rip | |
1784 | */ | |
e803cf97 | 1785 | if (forks) { |
20a8a3cf | 1786 | struct machine *machine = &session->machines.host; |
e5bed564 | 1787 | union perf_event *event; |
e907caf3 | 1788 | pid_t tgid; |
e5bed564 NK |
1789 | |
1790 | event = malloc(sizeof(event->comm) + machine->id_hdr_size); | |
1791 | if (event == NULL) { | |
1792 | err = -ENOMEM; | |
1793 | goto out_child; | |
1794 | } | |
1795 | ||
e803cf97 NK |
1796 | /* |
1797 | * Some H/W events are generated before COMM event | |
1798 | * which is emitted during exec(), so perf script | |
1799 | * cannot see a correct process name for those events. | |
1800 | * Synthesize COMM event to prevent it. | |
1801 | */ | |
e907caf3 HB |
1802 | tgid = perf_event__synthesize_comm(tool, event, |
1803 | rec->evlist->workload.pid, | |
1804 | process_synthesized_event, | |
1805 | machine); | |
1806 | free(event); | |
1807 | ||
1808 | if (tgid == -1) | |
1809 | goto out_child; | |
1810 | ||
1811 | event = malloc(sizeof(event->namespaces) + | |
1812 | (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) + | |
1813 | machine->id_hdr_size); | |
1814 | if (event == NULL) { | |
1815 | err = -ENOMEM; | |
1816 | goto out_child; | |
1817 | } | |
1818 | ||
1819 | /* | |
1820 | * Synthesize NAMESPACES event for the command specified. | |
1821 | */ | |
1822 | perf_event__synthesize_namespaces(tool, event, | |
1823 | rec->evlist->workload.pid, | |
1824 | tgid, process_synthesized_event, | |
1825 | machine); | |
e5bed564 | 1826 | free(event); |
e803cf97 | 1827 | |
3e2be2da | 1828 | perf_evlist__start_workload(rec->evlist); |
e803cf97 | 1829 | } |
856e9660 | 1830 | |
1d078ccb AB |
1831 | if (evlist__initialize_ctlfd(rec->evlist, opts->ctl_fd, opts->ctl_fd_ack)) |
1832 | goto out_child; | |
1833 | ||
6619a53e | 1834 | if (opts->initial_delay) { |
68cd3b45 AB |
1835 | pr_info(EVLIST_DISABLED_MSG); |
1836 | if (opts->initial_delay > 0) { | |
1837 | usleep(opts->initial_delay * USEC_PER_MSEC); | |
1838 | evlist__enable(rec->evlist); | |
1839 | pr_info(EVLIST_ENABLED_MSG); | |
1840 | } | |
6619a53e AK |
1841 | } |
1842 | ||
5f9cf599 | 1843 | trigger_ready(&auxtrace_snapshot_trigger); |
3c1cb7e3 | 1844 | trigger_ready(&switch_output_trigger); |
a074865e | 1845 | perf_hooks__invoke_record_start(); |
649c48a9 | 1846 | for (;;) { |
9f065194 | 1847 | unsigned long long hits = rec->samples; |
de9ac07b | 1848 | |
05737464 WN |
1849 | /* |
1850 | * rec->evlist->bkw_mmap_state is possible to be | |
1851 | * BKW_MMAP_EMPTY here: when done == true and | |
1852 | * hits != rec->samples in previous round. | |
1853 | * | |
1854 | * perf_evlist__toggle_bkw_mmap ensure we never | |
1855 | * convert BKW_MMAP_EMPTY to BKW_MMAP_DATA_PENDING. | |
1856 | */ | |
1857 | if (trigger_is_hit(&switch_output_trigger) || done || draining) | |
1858 | perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_DATA_PENDING); | |
1859 | ||
470530bb | 1860 | if (record__mmap_read_all(rec, false) < 0) { |
5f9cf599 | 1861 | trigger_error(&auxtrace_snapshot_trigger); |
3c1cb7e3 | 1862 | trigger_error(&switch_output_trigger); |
8d3eca20 | 1863 | err = -1; |
45604710 | 1864 | goto out_child; |
8d3eca20 | 1865 | } |
de9ac07b | 1866 | |
2dd6d8a1 AH |
1867 | if (auxtrace_record__snapshot_started) { |
1868 | auxtrace_record__snapshot_started = 0; | |
5f9cf599 | 1869 | if (!trigger_is_error(&auxtrace_snapshot_trigger)) |
ce7b0e42 | 1870 | record__read_auxtrace_snapshot(rec, false); |
5f9cf599 | 1871 | if (trigger_is_error(&auxtrace_snapshot_trigger)) { |
2dd6d8a1 AH |
1872 | pr_err("AUX area tracing snapshot failed\n"); |
1873 | err = -1; | |
1874 | goto out_child; | |
1875 | } | |
1876 | } | |
1877 | ||
3c1cb7e3 | 1878 | if (trigger_is_hit(&switch_output_trigger)) { |
05737464 WN |
1879 | /* |
1880 | * If switch_output_trigger is hit, the data in | |
1881 | * overwritable ring buffer should have been collected, | |
1882 | * so bkw_mmap_state should be set to BKW_MMAP_EMPTY. | |
1883 | * | |
1884 | * If SIGUSR2 raise after or during record__mmap_read_all(), | |
1885 | * record__mmap_read_all() didn't collect data from | |
1886 | * overwritable ring buffer. Read again. | |
1887 | */ | |
1888 | if (rec->evlist->bkw_mmap_state == BKW_MMAP_RUNNING) | |
1889 | continue; | |
3c1cb7e3 WN |
1890 | trigger_ready(&switch_output_trigger); |
1891 | ||
05737464 WN |
1892 | /* |
1893 | * Reenable events in overwrite ring buffer after | |
1894 | * record__mmap_read_all(): we should have collected | |
1895 | * data from it. | |
1896 | */ | |
1897 | perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_RUNNING); | |
1898 | ||
3c1cb7e3 WN |
1899 | if (!quiet) |
1900 | fprintf(stderr, "[ perf record: dump data: Woken up %ld times ]\n", | |
1901 | waking); | |
1902 | waking = 0; | |
1903 | fd = record__switch_output(rec, false); | |
1904 | if (fd < 0) { | |
1905 | pr_err("Failed to switch to new file\n"); | |
1906 | trigger_error(&switch_output_trigger); | |
1907 | err = fd; | |
1908 | goto out_child; | |
1909 | } | |
bfacbe3b JO |
1910 | |
1911 | /* re-arm the alarm */ | |
1912 | if (rec->switch_output.time) | |
1913 | alarm(rec->switch_output.time); | |
3c1cb7e3 WN |
1914 | } |
1915 | ||
d20deb64 | 1916 | if (hits == rec->samples) { |
6dcf45ef | 1917 | if (done || draining) |
649c48a9 | 1918 | break; |
80ab2987 | 1919 | err = evlist__poll(rec->evlist, -1); |
a515114f JO |
1920 | /* |
1921 | * Propagate error, only if there's any. Ignore positive | |
1922 | * number of returned events and interrupt error. | |
1923 | */ | |
1924 | if (err > 0 || (err < 0 && errno == EINTR)) | |
45604710 | 1925 | err = 0; |
8b412664 | 1926 | waking++; |
6dcf45ef | 1927 | |
f4009e7b | 1928 | if (evlist__filter_pollfd(rec->evlist, POLLERR | POLLHUP) == 0) |
6dcf45ef | 1929 | draining = true; |
8b412664 PZ |
1930 | } |
1931 | ||
acce0223 AB |
1932 | if (evlist__ctlfd_process(rec->evlist, &cmd) > 0) { |
1933 | switch (cmd) { | |
1934 | case EVLIST_CTL_CMD_ENABLE: | |
1935 | pr_info(EVLIST_ENABLED_MSG); | |
1936 | break; | |
1937 | case EVLIST_CTL_CMD_DISABLE: | |
1938 | pr_info(EVLIST_DISABLED_MSG); | |
1939 | break; | |
1940 | case EVLIST_CTL_CMD_ACK: | |
1941 | case EVLIST_CTL_CMD_UNSUPPORTED: | |
1942 | default: | |
1943 | break; | |
1944 | } | |
1945 | } | |
1946 | ||
774cb499 JO |
1947 | /* |
1948 | * When perf is starting the traced process, at the end events | |
1949 | * die with the process and we wait for that. Thus no need to | |
1950 | * disable events in this case. | |
1951 | */ | |
602ad878 | 1952 | if (done && !disabled && !target__none(&opts->target)) { |
5f9cf599 | 1953 | trigger_off(&auxtrace_snapshot_trigger); |
e74676de | 1954 | evlist__disable(rec->evlist); |
2711926a JO |
1955 | disabled = true; |
1956 | } | |
de9ac07b | 1957 | } |
ce7b0e42 | 1958 | |
5f9cf599 | 1959 | trigger_off(&auxtrace_snapshot_trigger); |
3c1cb7e3 | 1960 | trigger_off(&switch_output_trigger); |
de9ac07b | 1961 | |
ce7b0e42 AS |
1962 | if (opts->auxtrace_snapshot_on_exit) |
1963 | record__auxtrace_snapshot_exit(rec); | |
1964 | ||
f33cbe72 | 1965 | if (forks && workload_exec_errno) { |
35550da3 | 1966 | char msg[STRERR_BUFSIZE]; |
c8b5f2c9 | 1967 | const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg)); |
f33cbe72 ACM |
1968 | pr_err("Workload failed: %s\n", emsg); |
1969 | err = -1; | |
45604710 | 1970 | goto out_child; |
f33cbe72 ACM |
1971 | } |
1972 | ||
e3d59112 | 1973 | if (!quiet) |
45604710 | 1974 | fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); |
b44308f5 | 1975 | |
4ea648ae WN |
1976 | if (target__none(&rec->opts.target)) |
1977 | record__synthesize_workload(rec, true); | |
1978 | ||
45604710 | 1979 | out_child: |
1d078ccb | 1980 | evlist__finalize_ctlfd(rec->evlist); |
470530bb | 1981 | record__mmap_read_all(rec, true); |
d3d1af6f AB |
1982 | record__aio_mmap_read_sync(rec); |
1983 | ||
d3c8c08e AB |
1984 | if (rec->session->bytes_transferred && rec->session->bytes_compressed) { |
1985 | ratio = (float)rec->session->bytes_transferred/(float)rec->session->bytes_compressed; | |
1986 | session->header.env.comp_ratio = ratio + 0.5; | |
1987 | } | |
1988 | ||
45604710 NK |
1989 | if (forks) { |
1990 | int exit_status; | |
addc2785 | 1991 | |
45604710 NK |
1992 | if (!child_finished) |
1993 | kill(rec->evlist->workload.pid, SIGTERM); | |
1994 | ||
1995 | wait(&exit_status); | |
1996 | ||
1997 | if (err < 0) | |
1998 | status = err; | |
1999 | else if (WIFEXITED(exit_status)) | |
2000 | status = WEXITSTATUS(exit_status); | |
2001 | else if (WIFSIGNALED(exit_status)) | |
2002 | signr = WTERMSIG(exit_status); | |
2003 | } else | |
2004 | status = err; | |
2005 | ||
4ea648ae | 2006 | record__synthesize(rec, true); |
e3d59112 NK |
2007 | /* this will be recalculated during process_buildids() */ |
2008 | rec->samples = 0; | |
2009 | ||
ecfd7a9c WN |
2010 | if (!err) { |
2011 | if (!rec->timestamp_filename) { | |
2012 | record__finish_output(rec); | |
2013 | } else { | |
2014 | fd = record__switch_output(rec, true); | |
2015 | if (fd < 0) { | |
2016 | status = fd; | |
2017 | goto out_delete_session; | |
2018 | } | |
2019 | } | |
2020 | } | |
39d17dac | 2021 | |
a074865e WN |
2022 | perf_hooks__invoke_record_end(); |
2023 | ||
e3d59112 NK |
2024 | if (!err && !quiet) { |
2025 | char samples[128]; | |
ecfd7a9c WN |
2026 | const char *postfix = rec->timestamp_filename ? |
2027 | ".<timestamp>" : ""; | |
e3d59112 | 2028 | |
ef149c25 | 2029 | if (rec->samples && !rec->opts.full_auxtrace) |
e3d59112 NK |
2030 | scnprintf(samples, sizeof(samples), |
2031 | " (%" PRIu64 " samples)", rec->samples); | |
2032 | else | |
2033 | samples[0] = '\0'; | |
2034 | ||
d3c8c08e | 2035 | fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s%s%s", |
8ceb41d7 | 2036 | perf_data__size(data) / 1024.0 / 1024.0, |
2d4f2799 | 2037 | data->path, postfix, samples); |
d3c8c08e AB |
2038 | if (ratio) { |
2039 | fprintf(stderr, ", compressed (original %.3f MB, ratio is %.3f)", | |
2040 | rec->session->bytes_transferred / 1024.0 / 1024.0, | |
2041 | ratio); | |
2042 | } | |
2043 | fprintf(stderr, " ]\n"); | |
e3d59112 NK |
2044 | } |
2045 | ||
39d17dac | 2046 | out_delete_session: |
da231338 AM |
2047 | #ifdef HAVE_EVENTFD_SUPPORT |
2048 | if (done_fd >= 0) | |
2049 | close(done_fd); | |
2050 | #endif | |
5d7f4116 | 2051 | zstd_fini(&session->zstd_data); |
39d17dac | 2052 | perf_session__delete(session); |
657ee553 SL |
2053 | |
2054 | if (!opts->no_bpf_event) | |
bc477d79 | 2055 | perf_evlist__stop_sb_thread(rec->sb_evlist); |
45604710 | 2056 | return status; |
de9ac07b | 2057 | } |
0e9b20b8 | 2058 | |
0883e820 | 2059 | static void callchain_debug(struct callchain_param *callchain) |
09b0fd45 | 2060 | { |
aad2b21c | 2061 | static const char *str[CALLCHAIN_MAX] = { "NONE", "FP", "DWARF", "LBR" }; |
a601fdff | 2062 | |
0883e820 | 2063 | pr_debug("callchain: type %s\n", str[callchain->record_mode]); |
26d33022 | 2064 | |
0883e820 | 2065 | if (callchain->record_mode == CALLCHAIN_DWARF) |
09b0fd45 | 2066 | pr_debug("callchain: stack dump size %d\n", |
0883e820 | 2067 | callchain->dump_size); |
09b0fd45 JO |
2068 | } |
2069 | ||
0883e820 ACM |
2070 | int record_opts__parse_callchain(struct record_opts *record, |
2071 | struct callchain_param *callchain, | |
2072 | const char *arg, bool unset) | |
09b0fd45 | 2073 | { |
09b0fd45 | 2074 | int ret; |
0883e820 | 2075 | callchain->enabled = !unset; |
eb853e80 | 2076 | |
09b0fd45 JO |
2077 | /* --no-call-graph */ |
2078 | if (unset) { | |
0883e820 | 2079 | callchain->record_mode = CALLCHAIN_NONE; |
09b0fd45 JO |
2080 | pr_debug("callchain: disabled\n"); |
2081 | return 0; | |
2082 | } | |
2083 | ||
0883e820 | 2084 | ret = parse_callchain_record_opt(arg, callchain); |
5c0cf224 JO |
2085 | if (!ret) { |
2086 | /* Enable data address sampling for DWARF unwind. */ | |
0883e820 | 2087 | if (callchain->record_mode == CALLCHAIN_DWARF) |
5c0cf224 | 2088 | record->sample_address = true; |
0883e820 | 2089 | callchain_debug(callchain); |
5c0cf224 | 2090 | } |
26d33022 JO |
2091 | |
2092 | return ret; | |
2093 | } | |
2094 | ||
0883e820 ACM |
2095 | int record_parse_callchain_opt(const struct option *opt, |
2096 | const char *arg, | |
2097 | int unset) | |
2098 | { | |
2099 | return record_opts__parse_callchain(opt->value, &callchain_param, arg, unset); | |
2100 | } | |
2101 | ||
c421e80b | 2102 | int record_callchain_opt(const struct option *opt, |
09b0fd45 JO |
2103 | const char *arg __maybe_unused, |
2104 | int unset __maybe_unused) | |
2105 | { | |
2ddd5c04 | 2106 | struct callchain_param *callchain = opt->value; |
c421e80b | 2107 | |
2ddd5c04 | 2108 | callchain->enabled = true; |
09b0fd45 | 2109 | |
2ddd5c04 ACM |
2110 | if (callchain->record_mode == CALLCHAIN_NONE) |
2111 | callchain->record_mode = CALLCHAIN_FP; | |
eb853e80 | 2112 | |
2ddd5c04 | 2113 | callchain_debug(callchain); |
09b0fd45 JO |
2114 | return 0; |
2115 | } | |
2116 | ||
eb853e80 JO |
2117 | static int perf_record_config(const char *var, const char *value, void *cb) |
2118 | { | |
7a29c087 NK |
2119 | struct record *rec = cb; |
2120 | ||
2121 | if (!strcmp(var, "record.build-id")) { | |
2122 | if (!strcmp(value, "cache")) | |
2123 | rec->no_buildid_cache = false; | |
2124 | else if (!strcmp(value, "no-cache")) | |
2125 | rec->no_buildid_cache = true; | |
2126 | else if (!strcmp(value, "skip")) | |
2127 | rec->no_buildid = true; | |
2128 | else | |
2129 | return -1; | |
2130 | return 0; | |
2131 | } | |
cff17205 YX |
2132 | if (!strcmp(var, "record.call-graph")) { |
2133 | var = "call-graph.record-mode"; | |
2134 | return perf_default_config(var, value, cb); | |
2135 | } | |
93f20c0f AB |
2136 | #ifdef HAVE_AIO_SUPPORT |
2137 | if (!strcmp(var, "record.aio")) { | |
2138 | rec->opts.nr_cblocks = strtol(value, NULL, 0); | |
2139 | if (!rec->opts.nr_cblocks) | |
2140 | rec->opts.nr_cblocks = nr_cblocks_default; | |
2141 | } | |
2142 | #endif | |
eb853e80 | 2143 | |
cff17205 | 2144 | return 0; |
eb853e80 JO |
2145 | } |
2146 | ||
814c8c38 | 2147 | |
f4fe11b7 AB |
2148 | static int record__parse_affinity(const struct option *opt, const char *str, int unset) |
2149 | { | |
2150 | struct record_opts *opts = (struct record_opts *)opt->value; | |
2151 | ||
2152 | if (unset || !str) | |
2153 | return 0; | |
2154 | ||
2155 | if (!strcasecmp(str, "node")) | |
2156 | opts->affinity = PERF_AFFINITY_NODE; | |
2157 | else if (!strcasecmp(str, "cpu")) | |
2158 | opts->affinity = PERF_AFFINITY_CPU; | |
2159 | ||
2160 | return 0; | |
2161 | } | |
2162 | ||
6d575816 JS |
2163 | static int parse_output_max_size(const struct option *opt, |
2164 | const char *str, int unset) | |
2165 | { | |
2166 | unsigned long *s = (unsigned long *)opt->value; | |
2167 | static struct parse_tag tags_size[] = { | |
2168 | { .tag = 'B', .mult = 1 }, | |
2169 | { .tag = 'K', .mult = 1 << 10 }, | |
2170 | { .tag = 'M', .mult = 1 << 20 }, | |
2171 | { .tag = 'G', .mult = 1 << 30 }, | |
2172 | { .tag = 0 }, | |
2173 | }; | |
2174 | unsigned long val; | |
2175 | ||
2176 | if (unset) { | |
2177 | *s = 0; | |
2178 | return 0; | |
2179 | } | |
2180 | ||
2181 | val = parse_tag_value(str, tags_size); | |
2182 | if (val != (unsigned long) -1) { | |
2183 | *s = val; | |
2184 | return 0; | |
2185 | } | |
2186 | ||
2187 | return -1; | |
2188 | } | |
2189 | ||
e9db1310 AH |
2190 | static int record__parse_mmap_pages(const struct option *opt, |
2191 | const char *str, | |
2192 | int unset __maybe_unused) | |
2193 | { | |
2194 | struct record_opts *opts = opt->value; | |
2195 | char *s, *p; | |
2196 | unsigned int mmap_pages; | |
2197 | int ret; | |
2198 | ||
2199 | if (!str) | |
2200 | return -EINVAL; | |
2201 | ||
2202 | s = strdup(str); | |
2203 | if (!s) | |
2204 | return -ENOMEM; | |
2205 | ||
2206 | p = strchr(s, ','); | |
2207 | if (p) | |
2208 | *p = '\0'; | |
2209 | ||
2210 | if (*s) { | |
2211 | ret = __perf_evlist__parse_mmap_pages(&mmap_pages, s); | |
2212 | if (ret) | |
2213 | goto out_free; | |
2214 | opts->mmap_pages = mmap_pages; | |
2215 | } | |
2216 | ||
2217 | if (!p) { | |
2218 | ret = 0; | |
2219 | goto out_free; | |
2220 | } | |
2221 | ||
2222 | ret = __perf_evlist__parse_mmap_pages(&mmap_pages, p + 1); | |
2223 | if (ret) | |
2224 | goto out_free; | |
2225 | ||
2226 | opts->auxtrace_mmap_pages = mmap_pages; | |
2227 | ||
2228 | out_free: | |
2229 | free(s); | |
2230 | return ret; | |
2231 | } | |
2232 | ||
1d078ccb AB |
2233 | static int parse_control_option(const struct option *opt, |
2234 | const char *str, | |
2235 | int unset __maybe_unused) | |
2236 | { | |
2237 | char *comma = NULL, *endptr = NULL; | |
2238 | struct record_opts *config = (struct record_opts *)opt->value; | |
2239 | ||
2240 | if (strncmp(str, "fd:", 3)) | |
2241 | return -EINVAL; | |
2242 | ||
2243 | config->ctl_fd = strtoul(&str[3], &endptr, 0); | |
2244 | if (endptr == &str[3]) | |
2245 | return -EINVAL; | |
2246 | ||
2247 | comma = strchr(str, ','); | |
2248 | if (comma) { | |
2249 | if (endptr != comma) | |
2250 | return -EINVAL; | |
2251 | ||
2252 | config->ctl_fd_ack = strtoul(comma + 1, &endptr, 0); | |
2253 | if (endptr == comma + 1 || *endptr != '\0') | |
2254 | return -EINVAL; | |
2255 | } | |
2256 | ||
2257 | return 0; | |
2258 | } | |
2259 | ||
0c582449 JO |
2260 | static void switch_output_size_warn(struct record *rec) |
2261 | { | |
9521b5f2 | 2262 | u64 wakeup_size = evlist__mmap_size(rec->opts.mmap_pages); |
0c582449 JO |
2263 | struct switch_output *s = &rec->switch_output; |
2264 | ||
2265 | wakeup_size /= 2; | |
2266 | ||
2267 | if (s->size < wakeup_size) { | |
2268 | char buf[100]; | |
2269 | ||
2270 | unit_number__scnprintf(buf, sizeof(buf), wakeup_size); | |
2271 | pr_warning("WARNING: switch-output data size lower than " | |
2272 | "wakeup kernel buffer size (%s) " | |
2273 | "expect bigger perf.data sizes\n", buf); | |
2274 | } | |
2275 | } | |
2276 | ||
cb4e1ebb JO |
2277 | static int switch_output_setup(struct record *rec) |
2278 | { | |
2279 | struct switch_output *s = &rec->switch_output; | |
dc0c6127 JO |
2280 | static struct parse_tag tags_size[] = { |
2281 | { .tag = 'B', .mult = 1 }, | |
2282 | { .tag = 'K', .mult = 1 << 10 }, | |
2283 | { .tag = 'M', .mult = 1 << 20 }, | |
2284 | { .tag = 'G', .mult = 1 << 30 }, | |
2285 | { .tag = 0 }, | |
2286 | }; | |
bfacbe3b JO |
2287 | static struct parse_tag tags_time[] = { |
2288 | { .tag = 's', .mult = 1 }, | |
2289 | { .tag = 'm', .mult = 60 }, | |
2290 | { .tag = 'h', .mult = 60*60 }, | |
2291 | { .tag = 'd', .mult = 60*60*24 }, | |
2292 | { .tag = 0 }, | |
2293 | }; | |
dc0c6127 | 2294 | unsigned long val; |
cb4e1ebb | 2295 | |
899e5ffb ACM |
2296 | /* |
2297 | * If we're using --switch-output-events, then we imply its | |
2298 | * --switch-output=signal, as we'll send a SIGUSR2 from the side band | |
2299 | * thread to its parent. | |
2300 | */ | |
2301 | if (rec->switch_output_event_set) | |
2302 | goto do_signal; | |
2303 | ||
cb4e1ebb JO |
2304 | if (!s->set) |
2305 | return 0; | |
2306 | ||
2307 | if (!strcmp(s->str, "signal")) { | |
899e5ffb | 2308 | do_signal: |
cb4e1ebb JO |
2309 | s->signal = true; |
2310 | pr_debug("switch-output with SIGUSR2 signal\n"); | |
dc0c6127 JO |
2311 | goto enabled; |
2312 | } | |
2313 | ||
2314 | val = parse_tag_value(s->str, tags_size); | |
2315 | if (val != (unsigned long) -1) { | |
2316 | s->size = val; | |
2317 | pr_debug("switch-output with %s size threshold\n", s->str); | |
2318 | goto enabled; | |
cb4e1ebb JO |
2319 | } |
2320 | ||
bfacbe3b JO |
2321 | val = parse_tag_value(s->str, tags_time); |
2322 | if (val != (unsigned long) -1) { | |
2323 | s->time = val; | |
2324 | pr_debug("switch-output with %s time threshold (%lu seconds)\n", | |
2325 | s->str, s->time); | |
2326 | goto enabled; | |
2327 | } | |
2328 | ||
cb4e1ebb | 2329 | return -1; |
dc0c6127 JO |
2330 | |
2331 | enabled: | |
2332 | rec->timestamp_filename = true; | |
2333 | s->enabled = true; | |
0c582449 JO |
2334 | |
2335 | if (s->size && !rec->opts.no_buffering) | |
2336 | switch_output_size_warn(rec); | |
2337 | ||
dc0c6127 | 2338 | return 0; |
cb4e1ebb JO |
2339 | } |
2340 | ||
e5b2c207 | 2341 | static const char * const __record_usage[] = { |
9e096753 MG |
2342 | "perf record [<options>] [<command>]", |
2343 | "perf record [<options>] -- <command> [<options>]", | |
0e9b20b8 IM |
2344 | NULL |
2345 | }; | |
e5b2c207 | 2346 | const char * const *record_usage = __record_usage; |
0e9b20b8 | 2347 | |
6e0a9b3d ACM |
2348 | static int build_id__process_mmap(struct perf_tool *tool, union perf_event *event, |
2349 | struct perf_sample *sample, struct machine *machine) | |
2350 | { | |
2351 | /* | |
2352 | * We already have the kernel maps, put in place via perf_session__create_kernel_maps() | |
2353 | * no need to add them twice. | |
2354 | */ | |
2355 | if (!(event->header.misc & PERF_RECORD_MISC_USER)) | |
2356 | return 0; | |
2357 | return perf_event__process_mmap(tool, event, sample, machine); | |
2358 | } | |
2359 | ||
2360 | static int build_id__process_mmap2(struct perf_tool *tool, union perf_event *event, | |
2361 | struct perf_sample *sample, struct machine *machine) | |
2362 | { | |
2363 | /* | |
2364 | * We already have the kernel maps, put in place via perf_session__create_kernel_maps() | |
2365 | * no need to add them twice. | |
2366 | */ | |
2367 | if (!(event->header.misc & PERF_RECORD_MISC_USER)) | |
2368 | return 0; | |
2369 | ||
2370 | return perf_event__process_mmap2(tool, event, sample, machine); | |
2371 | } | |
2372 | ||
d20deb64 | 2373 | /* |
8c6f45a7 ACM |
2374 | * XXX Ideally would be local to cmd_record() and passed to a record__new |
2375 | * because we need to have access to it in record__exit, that is called | |
d20deb64 ACM |
2376 | * after cmd_record() exits, but since record_options need to be accessible to |
2377 | * builtin-script, leave it here. | |
2378 | * | |
2379 | * At least we don't ouch it in all the other functions here directly. | |
2380 | * | |
2381 | * Just say no to tons of global variables, sigh. | |
2382 | */ | |
8c6f45a7 | 2383 | static struct record record = { |
d20deb64 | 2384 | .opts = { |
8affc2b8 | 2385 | .sample_time = true, |
d20deb64 ACM |
2386 | .mmap_pages = UINT_MAX, |
2387 | .user_freq = UINT_MAX, | |
2388 | .user_interval = ULLONG_MAX, | |
447a6013 | 2389 | .freq = 4000, |
d1cb9fce NK |
2390 | .target = { |
2391 | .uses_mmap = true, | |
3aa5939d | 2392 | .default_per_cpu = true, |
d1cb9fce | 2393 | }, |
470530bb | 2394 | .mmap_flush = MMAP_FLUSH_DEFAULT, |
d99c22ea | 2395 | .nr_threads_synthesize = 1, |
1d078ccb AB |
2396 | .ctl_fd = -1, |
2397 | .ctl_fd_ack = -1, | |
d20deb64 | 2398 | }, |
e3d59112 NK |
2399 | .tool = { |
2400 | .sample = process_sample_event, | |
2401 | .fork = perf_event__process_fork, | |
cca8482c | 2402 | .exit = perf_event__process_exit, |
e3d59112 | 2403 | .comm = perf_event__process_comm, |
f3b3614a | 2404 | .namespaces = perf_event__process_namespaces, |
6e0a9b3d ACM |
2405 | .mmap = build_id__process_mmap, |
2406 | .mmap2 = build_id__process_mmap2, | |
cca8482c | 2407 | .ordered_events = true, |
e3d59112 | 2408 | }, |
d20deb64 | 2409 | }; |
7865e817 | 2410 | |
76a26549 NK |
2411 | const char record_callchain_help[] = CALLCHAIN_RECORD_HELP |
2412 | "\n\t\t\t\tDefault: fp"; | |
61eaa3be | 2413 | |
0aab2136 WN |
2414 | static bool dry_run; |
2415 | ||
d20deb64 ACM |
2416 | /* |
2417 | * XXX Will stay a global variable till we fix builtin-script.c to stop messing | |
2418 | * with it and switch to use the library functions in perf_evlist that came | |
b4006796 | 2419 | * from builtin-record.c, i.e. use record_opts, |
d20deb64 ACM |
2420 | * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record', |
2421 | * using pipes, etc. | |
2422 | */ | |
efd21307 | 2423 | static struct option __record_options[] = { |
d20deb64 | 2424 | OPT_CALLBACK('e', "event", &record.evlist, "event", |
86847b62 | 2425 | "event selector. use 'perf list' to list available events", |
f120f9d5 | 2426 | parse_events_option), |
d20deb64 | 2427 | OPT_CALLBACK(0, "filter", &record.evlist, "filter", |
c171b552 | 2428 | "event filter", parse_filter), |
4ba1faa1 WN |
2429 | OPT_CALLBACK_NOOPT(0, "exclude-perf", &record.evlist, |
2430 | NULL, "don't record events from perf itself", | |
2431 | exclude_perf), | |
bea03405 | 2432 | OPT_STRING('p', "pid", &record.opts.target.pid, "pid", |
d6d901c2 | 2433 | "record events on existing process id"), |
bea03405 | 2434 | OPT_STRING('t', "tid", &record.opts.target.tid, "tid", |
d6d901c2 | 2435 | "record events on existing thread id"), |
d20deb64 | 2436 | OPT_INTEGER('r', "realtime", &record.realtime_prio, |
0e9b20b8 | 2437 | "collect data with this RT SCHED_FIFO priority"), |
509051ea | 2438 | OPT_BOOLEAN(0, "no-buffering", &record.opts.no_buffering, |
acac03fa | 2439 | "collect data without buffering"), |
d20deb64 | 2440 | OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples, |
daac07b2 | 2441 | "collect raw sample records from all opened counters"), |
bea03405 | 2442 | OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide, |
0e9b20b8 | 2443 | "system-wide collection from all CPUs"), |
bea03405 | 2444 | OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu", |
c45c6ea2 | 2445 | "list of cpus to monitor"), |
d20deb64 | 2446 | OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"), |
2d4f2799 | 2447 | OPT_STRING('o', "output", &record.data.path, "file", |
abaff32a | 2448 | "output file name"), |
69e7e5b0 AH |
2449 | OPT_BOOLEAN_SET('i', "no-inherit", &record.opts.no_inherit, |
2450 | &record.opts.no_inherit_set, | |
2451 | "child tasks do not inherit counters"), | |
4ea648ae WN |
2452 | OPT_BOOLEAN(0, "tail-synthesize", &record.opts.tail_synthesize, |
2453 | "synthesize non-sample events at the end of output"), | |
626a6b78 | 2454 | OPT_BOOLEAN(0, "overwrite", &record.opts.overwrite, "use overwrite mode"), |
71184c6a | 2455 | OPT_BOOLEAN(0, "no-bpf-event", &record.opts.no_bpf_event, "record bpf events"), |
b09c2364 ACM |
2456 | OPT_BOOLEAN(0, "strict-freq", &record.opts.strict_freq, |
2457 | "Fail if the specified frequency can't be used"), | |
67230479 ACM |
2458 | OPT_CALLBACK('F', "freq", &record.opts, "freq or 'max'", |
2459 | "profile at this frequency", | |
2460 | record__parse_freq), | |
e9db1310 AH |
2461 | OPT_CALLBACK('m', "mmap-pages", &record.opts, "pages[,pages]", |
2462 | "number of mmap data pages and AUX area tracing mmap pages", | |
2463 | record__parse_mmap_pages), | |
470530bb AB |
2464 | OPT_CALLBACK(0, "mmap-flush", &record.opts, "number", |
2465 | "Minimal number of bytes that is extracted from mmap data pages (default: 1)", | |
2466 | record__mmap_flush_parse), | |
d20deb64 | 2467 | OPT_BOOLEAN(0, "group", &record.opts.group, |
43bece79 | 2468 | "put the counters into a counter group"), |
2ddd5c04 | 2469 | OPT_CALLBACK_NOOPT('g', NULL, &callchain_param, |
09b0fd45 JO |
2470 | NULL, "enables call-graph recording" , |
2471 | &record_callchain_opt), | |
2472 | OPT_CALLBACK(0, "call-graph", &record.opts, | |
76a26549 | 2473 | "record_mode[,record_size]", record_callchain_help, |
09b0fd45 | 2474 | &record_parse_callchain_opt), |
c0555642 | 2475 | OPT_INCR('v', "verbose", &verbose, |
3da297a6 | 2476 | "be more verbose (show counter open errors, etc)"), |
b44308f5 | 2477 | OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"), |
d20deb64 | 2478 | OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat, |
649c48a9 | 2479 | "per thread counts"), |
56100321 | 2480 | OPT_BOOLEAN('d', "data", &record.opts.sample_address, "Record the sample addresses"), |
3b0a5daa KL |
2481 | OPT_BOOLEAN(0, "phys-data", &record.opts.sample_phys_addr, |
2482 | "Record the sample physical addresses"), | |
b6f35ed7 | 2483 | OPT_BOOLEAN(0, "sample-cpu", &record.opts.sample_cpu, "Record the sample cpu"), |
3abebc55 AH |
2484 | OPT_BOOLEAN_SET('T', "timestamp", &record.opts.sample_time, |
2485 | &record.opts.sample_time_set, | |
2486 | "Record the sample timestamps"), | |
f290aa1f JO |
2487 | OPT_BOOLEAN_SET('P', "period", &record.opts.period, &record.opts.period_set, |
2488 | "Record the sample period"), | |
d20deb64 | 2489 | OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples, |
649c48a9 | 2490 | "don't sample"), |
d2db9a98 WN |
2491 | OPT_BOOLEAN_SET('N', "no-buildid-cache", &record.no_buildid_cache, |
2492 | &record.no_buildid_cache_set, | |
2493 | "do not update the buildid cache"), | |
2494 | OPT_BOOLEAN_SET('B', "no-buildid", &record.no_buildid, | |
2495 | &record.no_buildid_set, | |
2496 | "do not collect buildids in perf.data"), | |
d20deb64 | 2497 | OPT_CALLBACK('G', "cgroup", &record.evlist, "name", |
023695d9 SE |
2498 | "monitor event in cgroup name only", |
2499 | parse_cgroups), | |
68cd3b45 AB |
2500 | OPT_INTEGER('D', "delay", &record.opts.initial_delay, |
2501 | "ms to wait before starting measurement after program start (-1: start with events disabled)"), | |
eeb399b5 | 2502 | OPT_BOOLEAN(0, "kcore", &record.opts.kcore, "copy /proc/kcore"), |
bea03405 NK |
2503 | OPT_STRING('u', "uid", &record.opts.target.uid_str, "user", |
2504 | "user to profile"), | |
a5aabdac SE |
2505 | |
2506 | OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack, | |
2507 | "branch any", "sample any taken branches", | |
2508 | parse_branch_stack), | |
2509 | ||
2510 | OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack, | |
2511 | "branch filter mask", "branch stack filter modes", | |
bdfebd84 | 2512 | parse_branch_stack), |
05484298 AK |
2513 | OPT_BOOLEAN('W', "weight", &record.opts.sample_weight, |
2514 | "sample by weight (on special events only)"), | |
475eeab9 AK |
2515 | OPT_BOOLEAN(0, "transaction", &record.opts.sample_transaction, |
2516 | "sample transaction flags (special events only)"), | |
3aa5939d AH |
2517 | OPT_BOOLEAN(0, "per-thread", &record.opts.target.per_thread, |
2518 | "use per-thread mmaps"), | |
bcc84ec6 SE |
2519 | OPT_CALLBACK_OPTARG('I', "intr-regs", &record.opts.sample_intr_regs, NULL, "any register", |
2520 | "sample selected machine registers on interrupt," | |
aeea9062 | 2521 | " use '-I?' to list register names", parse_intr_regs), |
84c41742 AK |
2522 | OPT_CALLBACK_OPTARG(0, "user-regs", &record.opts.sample_user_regs, NULL, "any register", |
2523 | "sample selected machine registers on interrupt," | |
aeea9062 | 2524 | " use '--user-regs=?' to list register names", parse_user_regs), |
85c273d2 AK |
2525 | OPT_BOOLEAN(0, "running-time", &record.opts.running_time, |
2526 | "Record running/enabled time of read (:S) events"), | |
814c8c38 PZ |
2527 | OPT_CALLBACK('k', "clockid", &record.opts, |
2528 | "clockid", "clockid to use for events, see clock_gettime()", | |
2529 | parse_clockid), | |
2dd6d8a1 AH |
2530 | OPT_STRING_OPTARG('S', "snapshot", &record.opts.auxtrace_snapshot_opts, |
2531 | "opts", "AUX area tracing Snapshot Mode", ""), | |
c0a6de06 AH |
2532 | OPT_STRING_OPTARG(0, "aux-sample", &record.opts.auxtrace_sample_opts, |
2533 | "opts", "sample AUX area", ""), | |
3fcb10e4 | 2534 | OPT_UINTEGER(0, "proc-map-timeout", &proc_map_timeout, |
9d9cad76 | 2535 | "per thread proc mmap processing timeout in ms"), |
f3b3614a HB |
2536 | OPT_BOOLEAN(0, "namespaces", &record.opts.record_namespaces, |
2537 | "Record namespaces events"), | |
8fb4b679 NK |
2538 | OPT_BOOLEAN(0, "all-cgroups", &record.opts.record_cgroup, |
2539 | "Record cgroup events"), | |
16b4b4e1 AH |
2540 | OPT_BOOLEAN_SET(0, "switch-events", &record.opts.record_switch_events, |
2541 | &record.opts.record_switch_events_set, | |
2542 | "Record context switch events"), | |
85723885 JO |
2543 | OPT_BOOLEAN_FLAG(0, "all-kernel", &record.opts.all_kernel, |
2544 | "Configure all used events to run in kernel space.", | |
2545 | PARSE_OPT_EXCLUSIVE), | |
2546 | OPT_BOOLEAN_FLAG(0, "all-user", &record.opts.all_user, | |
2547 | "Configure all used events to run in user space.", | |
2548 | PARSE_OPT_EXCLUSIVE), | |
53651b28 | 2549 | OPT_BOOLEAN(0, "kernel-callchains", &record.opts.kernel_callchains, |
2550 | "collect kernel callchains"), | |
2551 | OPT_BOOLEAN(0, "user-callchains", &record.opts.user_callchains, | |
2552 | "collect user callchains"), | |
71dc2326 WN |
2553 | OPT_STRING(0, "clang-path", &llvm_param.clang_path, "clang path", |
2554 | "clang binary to use for compiling BPF scriptlets"), | |
2555 | OPT_STRING(0, "clang-opt", &llvm_param.clang_opt, "clang options", | |
2556 | "options passed to clang when compiling BPF scriptlets"), | |
7efe0e03 HK |
2557 | OPT_STRING(0, "vmlinux", &symbol_conf.vmlinux_name, |
2558 | "file", "vmlinux pathname"), | |
6156681b NK |
2559 | OPT_BOOLEAN(0, "buildid-all", &record.buildid_all, |
2560 | "Record build-id of all DSOs regardless of hits"), | |
ecfd7a9c WN |
2561 | OPT_BOOLEAN(0, "timestamp-filename", &record.timestamp_filename, |
2562 | "append timestamp to output filename"), | |
68588baf JY |
2563 | OPT_BOOLEAN(0, "timestamp-boundary", &record.timestamp_boundary, |
2564 | "Record timestamp boundary (time of first/last samples)"), | |
cb4e1ebb | 2565 | OPT_STRING_OPTARG_SET(0, "switch-output", &record.switch_output.str, |
c38dab7d AK |
2566 | &record.switch_output.set, "signal or size[BKMG] or time[smhd]", |
2567 | "Switch output when receiving SIGUSR2 (signal) or cross a size or time threshold", | |
dc0c6127 | 2568 | "signal"), |
899e5ffb ACM |
2569 | OPT_CALLBACK_SET(0, "switch-output-event", &record.sb_evlist, &record.switch_output_event_set, "switch output event", |
2570 | "switch output event selector. use 'perf list' to list available events", | |
2571 | parse_events_option_new_evlist), | |
03724b2e AK |
2572 | OPT_INTEGER(0, "switch-max-files", &record.switch_output.num_files, |
2573 | "Limit number of switch output generated files"), | |
0aab2136 WN |
2574 | OPT_BOOLEAN(0, "dry-run", &dry_run, |
2575 | "Parse options then exit"), | |
d3d1af6f | 2576 | #ifdef HAVE_AIO_SUPPORT |
93f20c0f AB |
2577 | OPT_CALLBACK_OPTARG(0, "aio", &record.opts, |
2578 | &nr_cblocks_default, "n", "Use <n> control blocks in asynchronous trace writing mode (default: 1, max: 4)", | |
d3d1af6f AB |
2579 | record__aio_parse), |
2580 | #endif | |
f4fe11b7 AB |
2581 | OPT_CALLBACK(0, "affinity", &record.opts, "node|cpu", |
2582 | "Set affinity mask of trace reading thread to NUMA node cpu mask or cpu of processed mmap buffer", | |
2583 | record__parse_affinity), | |
504c1ad1 AB |
2584 | #ifdef HAVE_ZSTD_SUPPORT |
2585 | OPT_CALLBACK_OPTARG('z', "compression-level", &record.opts, &comp_level_default, | |
2586 | "n", "Compressed records using specified level (default: 1 - fastest compression, 22 - greatest compression)", | |
2587 | record__parse_comp_level), | |
2588 | #endif | |
6d575816 JS |
2589 | OPT_CALLBACK(0, "max-size", &record.output_max_size, |
2590 | "size", "Limit the maximum size of the output file", parse_output_max_size), | |
d99c22ea SE |
2591 | OPT_UINTEGER(0, "num-thread-synthesize", |
2592 | &record.opts.nr_threads_synthesize, | |
2593 | "number of threads to run for event synthesis"), | |
70943490 SE |
2594 | #ifdef HAVE_LIBPFM |
2595 | OPT_CALLBACK(0, "pfm-events", &record.evlist, "event", | |
2596 | "libpfm4 event selector. use 'perf list' to list available events", | |
2597 | parse_libpfm_events_option), | |
2598 | #endif | |
1d078ccb AB |
2599 | OPT_CALLBACK(0, "control", &record.opts, "fd:ctl-fd[,ack-fd]", |
2600 | "Listen on ctl-fd descriptor for command to control measurement ('enable': enable events, 'disable': disable events).\n" | |
2601 | "\t\t\t Optionally send control command completion ('ack\\n') to ack-fd descriptor.", | |
2602 | parse_control_option), | |
0e9b20b8 IM |
2603 | OPT_END() |
2604 | }; | |
2605 | ||
e5b2c207 NK |
2606 | struct option *record_options = __record_options; |
2607 | ||
b0ad8ea6 | 2608 | int cmd_record(int argc, const char **argv) |
0e9b20b8 | 2609 | { |
ef149c25 | 2610 | int err; |
8c6f45a7 | 2611 | struct record *rec = &record; |
16ad2ffb | 2612 | char errbuf[BUFSIZ]; |
0e9b20b8 | 2613 | |
67230479 ACM |
2614 | setlocale(LC_ALL, ""); |
2615 | ||
48e1cab1 WN |
2616 | #ifndef HAVE_LIBBPF_SUPPORT |
2617 | # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, "NO_LIBBPF=1", c) | |
2618 | set_nobuild('\0', "clang-path", true); | |
2619 | set_nobuild('\0', "clang-opt", true); | |
2620 | # undef set_nobuild | |
7efe0e03 HK |
2621 | #endif |
2622 | ||
2623 | #ifndef HAVE_BPF_PROLOGUE | |
2624 | # if !defined (HAVE_DWARF_SUPPORT) | |
2625 | # define REASON "NO_DWARF=1" | |
2626 | # elif !defined (HAVE_LIBBPF_SUPPORT) | |
2627 | # define REASON "NO_LIBBPF=1" | |
2628 | # else | |
2629 | # define REASON "this architecture doesn't support BPF prologue" | |
2630 | # endif | |
2631 | # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, REASON, c) | |
2632 | set_nobuild('\0', "vmlinux", true); | |
2633 | # undef set_nobuild | |
2634 | # undef REASON | |
48e1cab1 WN |
2635 | #endif |
2636 | ||
9d2ed645 AB |
2637 | rec->opts.affinity = PERF_AFFINITY_SYS; |
2638 | ||
0f98b11c | 2639 | rec->evlist = evlist__new(); |
3e2be2da | 2640 | if (rec->evlist == NULL) |
361c99a6 ACM |
2641 | return -ENOMEM; |
2642 | ||
ecc4c561 ACM |
2643 | err = perf_config(perf_record_config, rec); |
2644 | if (err) | |
2645 | return err; | |
eb853e80 | 2646 | |
bca647aa | 2647 | argc = parse_options(argc, argv, record_options, record_usage, |
655000e7 | 2648 | PARSE_OPT_STOP_AT_NON_OPTION); |
68ba3235 NK |
2649 | if (quiet) |
2650 | perf_quiet_option(); | |
483635a9 JO |
2651 | |
2652 | /* Make system wide (-a) the default target. */ | |
602ad878 | 2653 | if (!argc && target__none(&rec->opts.target)) |
483635a9 | 2654 | rec->opts.target.system_wide = true; |
0e9b20b8 | 2655 | |
bea03405 | 2656 | if (nr_cgroups && !rec->opts.target.system_wide) { |
c7118369 NK |
2657 | usage_with_options_msg(record_usage, record_options, |
2658 | "cgroup monitoring only available in system-wide mode"); | |
2659 | ||
023695d9 | 2660 | } |
504c1ad1 | 2661 | |
eeb399b5 AH |
2662 | if (rec->opts.kcore) |
2663 | rec->data.is_dir = true; | |
2664 | ||
504c1ad1 AB |
2665 | if (rec->opts.comp_level != 0) { |
2666 | pr_debug("Compression enabled, disabling build id collection at the end of the session.\n"); | |
2667 | rec->no_buildid = true; | |
2668 | } | |
2669 | ||
b757bb09 AH |
2670 | if (rec->opts.record_switch_events && |
2671 | !perf_can_record_switch_events()) { | |
c7118369 NK |
2672 | ui__error("kernel does not support recording context switch events\n"); |
2673 | parse_options_usage(record_usage, record_options, "switch-events", 0); | |
2674 | return -EINVAL; | |
b757bb09 | 2675 | } |
023695d9 | 2676 | |
cb4e1ebb JO |
2677 | if (switch_output_setup(rec)) { |
2678 | parse_options_usage(record_usage, record_options, "switch-output", 0); | |
2679 | return -EINVAL; | |
2680 | } | |
2681 | ||
bfacbe3b JO |
2682 | if (rec->switch_output.time) { |
2683 | signal(SIGALRM, alarm_sig_handler); | |
2684 | alarm(rec->switch_output.time); | |
2685 | } | |
2686 | ||
03724b2e AK |
2687 | if (rec->switch_output.num_files) { |
2688 | rec->switch_output.filenames = calloc(sizeof(char *), | |
2689 | rec->switch_output.num_files); | |
2690 | if (!rec->switch_output.filenames) | |
2691 | return -EINVAL; | |
2692 | } | |
2693 | ||
1b36c03e AH |
2694 | /* |
2695 | * Allow aliases to facilitate the lookup of symbols for address | |
2696 | * filters. Refer to auxtrace_parse_filters(). | |
2697 | */ | |
2698 | symbol_conf.allow_aliases = true; | |
2699 | ||
2700 | symbol__init(NULL); | |
2701 | ||
8384a260 AB |
2702 | if (rec->opts.affinity != PERF_AFFINITY_SYS) { |
2703 | rec->affinity_mask.nbits = cpu__max_cpu(); | |
2704 | rec->affinity_mask.bits = bitmap_alloc(rec->affinity_mask.nbits); | |
2705 | if (!rec->affinity_mask.bits) { | |
2706 | pr_err("Failed to allocate thread mask for %zd cpus\n", rec->affinity_mask.nbits); | |
2707 | return -ENOMEM; | |
2708 | } | |
2709 | pr_debug2("thread mask[%zd]: empty\n", rec->affinity_mask.nbits); | |
2710 | } | |
2711 | ||
4b5ea3bd | 2712 | err = record__auxtrace_init(rec); |
1b36c03e AH |
2713 | if (err) |
2714 | goto out; | |
2715 | ||
0aab2136 | 2716 | if (dry_run) |
5c01ad60 | 2717 | goto out; |
0aab2136 | 2718 | |
d7888573 WN |
2719 | err = bpf__setup_stdout(rec->evlist); |
2720 | if (err) { | |
2721 | bpf__strerror_setup_stdout(rec->evlist, err, errbuf, sizeof(errbuf)); | |
2722 | pr_err("ERROR: Setup BPF stdout failed: %s\n", | |
2723 | errbuf); | |
5c01ad60 | 2724 | goto out; |
d7888573 WN |
2725 | } |
2726 | ||
ef149c25 AH |
2727 | err = -ENOMEM; |
2728 | ||
0c1d46a8 | 2729 | if (rec->no_buildid_cache || rec->no_buildid) { |
a1ac1d3c | 2730 | disable_buildid_cache(); |
dc0c6127 | 2731 | } else if (rec->switch_output.enabled) { |
0c1d46a8 WN |
2732 | /* |
2733 | * In 'perf record --switch-output', disable buildid | |
2734 | * generation by default to reduce data file switching | |
2735 | * overhead. Still generate buildid if they are required | |
2736 | * explicitly using | |
2737 | * | |
60437ac0 | 2738 | * perf record --switch-output --no-no-buildid \ |
0c1d46a8 WN |
2739 | * --no-no-buildid-cache |
2740 | * | |
2741 | * Following code equals to: | |
2742 | * | |
2743 | * if ((rec->no_buildid || !rec->no_buildid_set) && | |
2744 | * (rec->no_buildid_cache || !rec->no_buildid_cache_set)) | |
2745 | * disable_buildid_cache(); | |
2746 | */ | |
2747 | bool disable = true; | |
2748 | ||
2749 | if (rec->no_buildid_set && !rec->no_buildid) | |
2750 | disable = false; | |
2751 | if (rec->no_buildid_cache_set && !rec->no_buildid_cache) | |
2752 | disable = false; | |
2753 | if (disable) { | |
2754 | rec->no_buildid = true; | |
2755 | rec->no_buildid_cache = true; | |
2756 | disable_buildid_cache(); | |
2757 | } | |
2758 | } | |
655000e7 | 2759 | |
4ea648ae WN |
2760 | if (record.opts.overwrite) |
2761 | record.opts.tail_synthesize = true; | |
2762 | ||
6484d2f9 | 2763 | if (rec->evlist->core.nr_entries == 0 && |
e251abee | 2764 | __evlist__add_default(rec->evlist, !record.opts.no_samples) < 0) { |
69aad6f1 | 2765 | pr_err("Not enough memory for event selector list\n"); |
394c01ed | 2766 | goto out; |
bbd36e5e | 2767 | } |
0e9b20b8 | 2768 | |
69e7e5b0 AH |
2769 | if (rec->opts.target.tid && !rec->opts.no_inherit_set) |
2770 | rec->opts.no_inherit = true; | |
2771 | ||
602ad878 | 2772 | err = target__validate(&rec->opts.target); |
16ad2ffb | 2773 | if (err) { |
602ad878 | 2774 | target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); |
c3dec27b | 2775 | ui__warning("%s\n", errbuf); |
16ad2ffb NK |
2776 | } |
2777 | ||
602ad878 | 2778 | err = target__parse_uid(&rec->opts.target); |
16ad2ffb NK |
2779 | if (err) { |
2780 | int saved_errno = errno; | |
4bd0f2d2 | 2781 | |
602ad878 | 2782 | target__strerror(&rec->opts.target, err, errbuf, BUFSIZ); |
3780f488 | 2783 | ui__error("%s", errbuf); |
16ad2ffb NK |
2784 | |
2785 | err = -saved_errno; | |
394c01ed | 2786 | goto out; |
16ad2ffb | 2787 | } |
0d37aa34 | 2788 | |
ca800068 MZ |
2789 | /* Enable ignoring missing threads when -u/-p option is defined. */ |
2790 | rec->opts.ignore_missing_thread = rec->opts.target.uid != UINT_MAX || rec->opts.target.pid; | |
23dc4f15 | 2791 | |
16ad2ffb | 2792 | err = -ENOMEM; |
3e2be2da | 2793 | if (perf_evlist__create_maps(rec->evlist, &rec->opts.target) < 0) |
dd7927f4 | 2794 | usage_with_options(record_usage, record_options); |
69aad6f1 | 2795 | |
ef149c25 AH |
2796 | err = auxtrace_record__options(rec->itr, rec->evlist, &rec->opts); |
2797 | if (err) | |
394c01ed | 2798 | goto out; |
ef149c25 | 2799 | |
6156681b NK |
2800 | /* |
2801 | * We take all buildids when the file contains | |
2802 | * AUX area tracing data because we do not decode the | |
2803 | * trace because it would take too long. | |
2804 | */ | |
2805 | if (rec->opts.full_auxtrace) | |
2806 | rec->buildid_all = true; | |
2807 | ||
246eba8e AH |
2808 | if (rec->opts.text_poke) { |
2809 | err = record__config_text_poke(rec->evlist); | |
2810 | if (err) { | |
2811 | pr_err("record__config_text_poke failed, error %d\n", err); | |
2812 | goto out; | |
2813 | } | |
2814 | } | |
2815 | ||
b4006796 | 2816 | if (record_opts__config(&rec->opts)) { |
39d17dac | 2817 | err = -EINVAL; |
394c01ed | 2818 | goto out; |
7e4ff9e3 MG |
2819 | } |
2820 | ||
93f20c0f AB |
2821 | if (rec->opts.nr_cblocks > nr_cblocks_max) |
2822 | rec->opts.nr_cblocks = nr_cblocks_max; | |
5d7f4116 | 2823 | pr_debug("nr_cblocks: %d\n", rec->opts.nr_cblocks); |
d3d1af6f | 2824 | |
9d2ed645 | 2825 | pr_debug("affinity: %s\n", affinity_tags[rec->opts.affinity]); |
470530bb | 2826 | pr_debug("mmap flush: %d\n", rec->opts.mmap_flush); |
9d2ed645 | 2827 | |
51255a8a AB |
2828 | if (rec->opts.comp_level > comp_level_max) |
2829 | rec->opts.comp_level = comp_level_max; | |
2830 | pr_debug("comp level: %d\n", rec->opts.comp_level); | |
2831 | ||
d20deb64 | 2832 | err = __cmd_record(&record, argc, argv); |
394c01ed | 2833 | out: |
8384a260 | 2834 | bitmap_free(rec->affinity_mask.bits); |
c12995a5 | 2835 | evlist__delete(rec->evlist); |
d65a458b | 2836 | symbol__exit(); |
ef149c25 | 2837 | auxtrace_record__free(rec->itr); |
39d17dac | 2838 | return err; |
0e9b20b8 | 2839 | } |
2dd6d8a1 AH |
2840 | |
2841 | static void snapshot_sig_handler(int sig __maybe_unused) | |
2842 | { | |
dc0c6127 JO |
2843 | struct record *rec = &record; |
2844 | ||
5f9cf599 WN |
2845 | if (trigger_is_ready(&auxtrace_snapshot_trigger)) { |
2846 | trigger_hit(&auxtrace_snapshot_trigger); | |
2847 | auxtrace_record__snapshot_started = 1; | |
2848 | if (auxtrace_record__snapshot_start(record.itr)) | |
2849 | trigger_error(&auxtrace_snapshot_trigger); | |
2850 | } | |
3c1cb7e3 | 2851 | |
dc0c6127 | 2852 | if (switch_output_signal(rec)) |
3c1cb7e3 | 2853 | trigger_hit(&switch_output_trigger); |
2dd6d8a1 | 2854 | } |
bfacbe3b JO |
2855 | |
2856 | static void alarm_sig_handler(int sig __maybe_unused) | |
2857 | { | |
2858 | struct record *rec = &record; | |
2859 | ||
2860 | if (switch_output_time(rec)) | |
2861 | trigger_hit(&switch_output_trigger); | |
2862 | } |