Commit | Line | Data |
---|---|---|
abaff32a | 1 | /* |
bf9e1876 IM |
2 | * builtin-record.c |
3 | * | |
4 | * Builtin record command: Record the profile of a workload | |
5 | * (or a CPU, or a PID) into the perf.data output file - for | |
6 | * later analysis via perf report. | |
abaff32a | 7 | */ |
b8f46c5a XG |
8 | #define _FILE_OFFSET_BITS 64 |
9 | ||
16f762a2 | 10 | #include "builtin.h" |
bf9e1876 IM |
11 | |
12 | #include "perf.h" | |
13 | ||
6122e4e4 | 14 | #include "util/build-id.h" |
6eda5838 | 15 | #include "util/util.h" |
0e9b20b8 | 16 | #include "util/parse-options.h" |
8ad8db37 | 17 | #include "util/parse-events.h" |
6eda5838 | 18 | |
7c6a1c65 | 19 | #include "util/header.h" |
66e274f3 | 20 | #include "util/event.h" |
361c99a6 | 21 | #include "util/evlist.h" |
69aad6f1 | 22 | #include "util/evsel.h" |
8f28827a | 23 | #include "util/debug.h" |
94c744b6 | 24 | #include "util/session.h" |
8d06367f | 25 | #include "util/symbol.h" |
a12b51c4 | 26 | #include "util/cpumap.h" |
fd78260b | 27 | #include "util/thread_map.h" |
7c6a1c65 | 28 | |
97124d5e | 29 | #include <unistd.h> |
de9ac07b | 30 | #include <sched.h> |
a41794cd | 31 | #include <sys/mman.h> |
de9ac07b | 32 | |
7865e817 FW |
33 | enum write_mode_t { |
34 | WRITE_FORCE, | |
35 | WRITE_APPEND | |
36 | }; | |
37 | ||
d20deb64 ACM |
38 | struct perf_record { |
39 | struct perf_event_ops ops; | |
40 | struct perf_record_opts opts; | |
41 | u64 bytes_written; | |
42 | const char *output_name; | |
43 | struct perf_evlist *evlist; | |
44 | struct perf_session *session; | |
45 | const char *progname; | |
46 | int output; | |
47 | unsigned int page_size; | |
48 | int realtime_prio; | |
49 | enum write_mode_t write_mode; | |
50 | bool no_buildid; | |
51 | bool no_buildid_cache; | |
52 | bool force; | |
53 | bool file_new; | |
54 | bool append_file; | |
55 | long samples; | |
56 | off_t post_processing_offset; | |
0f82ebc4 | 57 | }; |
a21ca2ca | 58 | |
d20deb64 | 59 | static void advance_output(struct perf_record *rec, size_t size) |
9215545e | 60 | { |
d20deb64 | 61 | rec->bytes_written += size; |
9215545e TZ |
62 | } |
63 | ||
d20deb64 | 64 | static void write_output(struct perf_record *rec, void *buf, size_t size) |
f5970550 PZ |
65 | { |
66 | while (size) { | |
d20deb64 | 67 | int ret = write(rec->output, buf, size); |
f5970550 PZ |
68 | |
69 | if (ret < 0) | |
70 | die("failed to write"); | |
71 | ||
72 | size -= ret; | |
73 | buf += ret; | |
74 | ||
d20deb64 | 75 | rec->bytes_written += ret; |
f5970550 PZ |
76 | } |
77 | } | |
78 | ||
d20deb64 ACM |
79 | static int process_synthesized_event(struct perf_event_ops *ops, |
80 | union perf_event *event, | |
8d50e5b4 | 81 | struct perf_sample *sample __used, |
d8f66248 | 82 | struct perf_session *self __used) |
234fbbf5 | 83 | { |
d20deb64 ACM |
84 | struct perf_record *rec = container_of(ops, struct perf_record, ops); |
85 | write_output(rec, event, event->header.size); | |
234fbbf5 ACM |
86 | return 0; |
87 | } | |
88 | ||
d20deb64 ACM |
89 | static void perf_record__mmap_read(struct perf_record *rec, |
90 | struct perf_mmap *md) | |
de9ac07b | 91 | { |
744bd8aa | 92 | unsigned int head = perf_mmap__read_head(md); |
de9ac07b | 93 | unsigned int old = md->prev; |
d20deb64 | 94 | unsigned char *data = md->base + rec->page_size; |
de9ac07b PZ |
95 | unsigned long size; |
96 | void *buf; | |
de9ac07b | 97 | |
dc82009a ACM |
98 | if (old == head) |
99 | return; | |
100 | ||
d20deb64 | 101 | rec->samples++; |
de9ac07b PZ |
102 | |
103 | size = head - old; | |
104 | ||
105 | if ((old & md->mask) + size != (head & md->mask)) { | |
106 | buf = &data[old & md->mask]; | |
107 | size = md->mask + 1 - (old & md->mask); | |
108 | old += size; | |
021e9f47 | 109 | |
d20deb64 | 110 | write_output(rec, buf, size); |
de9ac07b PZ |
111 | } |
112 | ||
113 | buf = &data[old & md->mask]; | |
114 | size = head - old; | |
115 | old += size; | |
021e9f47 | 116 | |
d20deb64 | 117 | write_output(rec, buf, size); |
de9ac07b PZ |
118 | |
119 | md->prev = old; | |
115d2d89 | 120 | perf_mmap__write_tail(md, old); |
de9ac07b PZ |
121 | } |
122 | ||
123 | static volatile int done = 0; | |
f7b7c26e | 124 | static volatile int signr = -1; |
33e49ea7 | 125 | static volatile int child_finished = 0; |
de9ac07b | 126 | |
16c8a109 | 127 | static void sig_handler(int sig) |
de9ac07b | 128 | { |
33e49ea7 AK |
129 | if (sig == SIGCHLD) |
130 | child_finished = 1; | |
131 | ||
16c8a109 | 132 | done = 1; |
f7b7c26e PZ |
133 | signr = sig; |
134 | } | |
135 | ||
d20deb64 | 136 | static void perf_record__sig_exit(int exit_status __used, void *arg) |
f7b7c26e | 137 | { |
d20deb64 | 138 | struct perf_record *rec = arg; |
33e49ea7 AK |
139 | int status; |
140 | ||
d20deb64 | 141 | if (rec->evlist->workload.pid > 0) { |
33e49ea7 | 142 | if (!child_finished) |
d20deb64 | 143 | kill(rec->evlist->workload.pid, SIGTERM); |
33e49ea7 AK |
144 | |
145 | wait(&status); | |
146 | if (WIFSIGNALED(status)) | |
d20deb64 | 147 | psignal(WTERMSIG(status), rec->progname); |
33e49ea7 | 148 | } |
933da83a | 149 | |
18483b81 | 150 | if (signr == -1 || signr == SIGUSR1) |
f7b7c26e PZ |
151 | return; |
152 | ||
153 | signal(signr, SIG_DFL); | |
154 | kill(getpid(), signr); | |
de9ac07b PZ |
155 | } |
156 | ||
a91e5431 ACM |
157 | static bool perf_evlist__equal(struct perf_evlist *evlist, |
158 | struct perf_evlist *other) | |
159 | { | |
160 | struct perf_evsel *pos, *pair; | |
161 | ||
162 | if (evlist->nr_entries != other->nr_entries) | |
163 | return false; | |
164 | ||
165 | pair = list_entry(other->entries.next, struct perf_evsel, node); | |
166 | ||
167 | list_for_each_entry(pos, &evlist->entries, node) { | |
168 | if (memcmp(&pos->attr, &pair->attr, sizeof(pos->attr) != 0)) | |
169 | return false; | |
170 | pair = list_entry(pair->node.next, struct perf_evsel, node); | |
171 | } | |
172 | ||
173 | return true; | |
174 | } | |
175 | ||
d20deb64 | 176 | static void perf_record__open(struct perf_record *rec) |
dd7927f4 | 177 | { |
727ab04e | 178 | struct perf_evsel *pos, *first; |
d20deb64 ACM |
179 | struct perf_evlist *evlist = rec->evlist; |
180 | struct perf_session *session = rec->session; | |
181 | struct perf_record_opts *opts = &rec->opts; | |
dd7927f4 | 182 | |
727ab04e ACM |
183 | first = list_entry(evlist->entries.next, struct perf_evsel, node); |
184 | ||
d20deb64 | 185 | perf_evlist__config_attrs(evlist, opts); |
0f82ebc4 | 186 | |
dd7927f4 ACM |
187 | list_for_each_entry(pos, &evlist->entries, node) { |
188 | struct perf_event_attr *attr = &pos->attr; | |
727ab04e | 189 | struct xyarray *group_fd = NULL; |
dd7927f4 ACM |
190 | /* |
191 | * Check if parse_single_tracepoint_event has already asked for | |
192 | * PERF_SAMPLE_TIME. | |
193 | * | |
194 | * XXX this is kludgy but short term fix for problems introduced by | |
195 | * eac23d1c that broke 'perf script' by having different sample_types | |
196 | * when using multiple tracepoint events when we use a perf binary | |
197 | * that tries to use sample_id_all on an older kernel. | |
198 | * | |
199 | * We need to move counter creation to perf_session, support | |
200 | * different sample_types, etc. | |
201 | */ | |
202 | bool time_needed = attr->sample_type & PERF_SAMPLE_TIME; | |
d6d901c2 | 203 | |
d20deb64 | 204 | if (opts->group && pos != first) |
727ab04e | 205 | group_fd = first->fd; |
dd7927f4 | 206 | retry_sample_id: |
d20deb64 | 207 | attr->sample_id_all = opts->sample_id_all_avail ? 1 : 0; |
dd7927f4 | 208 | try_again: |
ed80f581 | 209 | if (perf_evsel__open(pos, evlist->cpus, evlist->threads, |
d20deb64 | 210 | opts->group, group_fd) < 0) { |
d6d901c2 ZY |
211 | int err = errno; |
212 | ||
c286c419 | 213 | if (err == EPERM || err == EACCES) { |
b8631e6e | 214 | ui__error_paranoid(); |
c286c419 | 215 | exit(EXIT_FAILURE); |
d20deb64 | 216 | } else if (err == ENODEV && opts->cpu_list) { |
d6d901c2 ZY |
217 | die("No such device - did you specify" |
218 | " an out-of-range profile CPU?\n"); | |
d20deb64 | 219 | } else if (err == EINVAL && opts->sample_id_all_avail) { |
9c90a61c ACM |
220 | /* |
221 | * Old kernel, no attr->sample_id_type_all field | |
222 | */ | |
d20deb64 ACM |
223 | opts->sample_id_all_avail = false; |
224 | if (!opts->sample_time && !opts->raw_samples && !time_needed) | |
eac23d1c IM |
225 | attr->sample_type &= ~PERF_SAMPLE_TIME; |
226 | ||
9c90a61c | 227 | goto retry_sample_id; |
d6d901c2 | 228 | } |
3da297a6 | 229 | |
d6d901c2 ZY |
230 | /* |
231 | * If it's cycles then fall back to hrtimer | |
232 | * based cpu-clock-tick sw counter, which | |
233 | * is always available even if no PMU support: | |
234 | */ | |
235 | if (attr->type == PERF_TYPE_HARDWARE | |
236 | && attr->config == PERF_COUNT_HW_CPU_CYCLES) { | |
237 | ||
238 | if (verbose) | |
ca6a4258 DA |
239 | ui__warning("The cycles event is not supported, " |
240 | "trying to fall back to cpu-clock-ticks\n"); | |
d6d901c2 ZY |
241 | attr->type = PERF_TYPE_SOFTWARE; |
242 | attr->config = PERF_COUNT_SW_CPU_CLOCK; | |
243 | goto try_again; | |
244 | } | |
ca6a4258 DA |
245 | |
246 | if (err == ENOENT) { | |
247 | ui__warning("The %s event is not supported.\n", | |
248 | event_name(pos)); | |
249 | exit(EXIT_FAILURE); | |
250 | } | |
251 | ||
d6d901c2 | 252 | printf("\n"); |
d9cf837e | 253 | error("sys_perf_event_open() syscall returned with %d (%s). /bin/dmesg may provide additional information.\n", |
dd7927f4 | 254 | err, strerror(err)); |
bfd45118 SK |
255 | |
256 | #if defined(__i386__) || defined(__x86_64__) | |
d6d901c2 ZY |
257 | if (attr->type == PERF_TYPE_HARDWARE && err == EOPNOTSUPP) |
258 | die("No hardware sampling interrupt available." | |
259 | " No APIC? If so then you can boot the kernel" | |
260 | " with the \"lapic\" boot parameter to" | |
261 | " force-enable it.\n"); | |
bfd45118 SK |
262 | #endif |
263 | ||
d6d901c2 | 264 | die("No CONFIG_PERF_EVENTS=y kernel support configured?\n"); |
c171b552 LZ |
265 | } |
266 | } | |
a43d3f08 | 267 | |
0a102479 FW |
268 | if (perf_evlist__set_filters(evlist)) { |
269 | error("failed to set filter with %d (%s)\n", errno, | |
270 | strerror(errno)); | |
271 | exit(-1); | |
272 | } | |
273 | ||
d20deb64 | 274 | if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) |
0a27d7f9 ACM |
275 | die("failed to mmap with %d (%s)\n", errno, strerror(errno)); |
276 | ||
d20deb64 | 277 | if (rec->file_new) |
a91e5431 ACM |
278 | session->evlist = evlist; |
279 | else { | |
280 | if (!perf_evlist__equal(session->evlist, evlist)) { | |
281 | fprintf(stderr, "incompatible append\n"); | |
282 | exit(-1); | |
283 | } | |
284 | } | |
285 | ||
286 | perf_session__update_sample_type(session); | |
16c8a109 PZ |
287 | } |
288 | ||
d20deb64 | 289 | static int process_buildids(struct perf_record *rec) |
6122e4e4 | 290 | { |
d20deb64 | 291 | u64 size = lseek(rec->output, 0, SEEK_CUR); |
6122e4e4 | 292 | |
9f591fd7 ACM |
293 | if (size == 0) |
294 | return 0; | |
295 | ||
d20deb64 ACM |
296 | rec->session->fd = rec->output; |
297 | return __perf_session__process_events(rec->session, rec->post_processing_offset, | |
298 | size - rec->post_processing_offset, | |
6122e4e4 ACM |
299 | size, &build_id__mark_dso_hit_ops); |
300 | } | |
301 | ||
d20deb64 | 302 | static void perf_record__exit(int status __used, void *arg) |
f5970550 | 303 | { |
d20deb64 ACM |
304 | struct perf_record *rec = arg; |
305 | ||
306 | if (!rec->opts.pipe_output) { | |
307 | rec->session->header.data_size += rec->bytes_written; | |
308 | ||
309 | if (!rec->no_buildid) | |
310 | process_buildids(rec); | |
311 | perf_session__write_header(rec->session, rec->evlist, | |
312 | rec->output, true); | |
313 | perf_session__delete(rec->session); | |
314 | perf_evlist__delete(rec->evlist); | |
d65a458b | 315 | symbol__exit(); |
c7929e47 | 316 | } |
f5970550 PZ |
317 | } |
318 | ||
8115d60c | 319 | static void perf_event__synthesize_guest_os(struct machine *machine, void *data) |
a1645ce1 ZY |
320 | { |
321 | int err; | |
d20deb64 ACM |
322 | struct perf_event_ops *ops = data; |
323 | struct perf_record *rec = container_of(ops, struct perf_record, ops); | |
324 | struct perf_session *psession = rec->session; | |
a1645ce1 | 325 | |
23346f21 | 326 | if (machine__is_host(machine)) |
a1645ce1 ZY |
327 | return; |
328 | ||
329 | /* | |
330 | *As for guest kernel when processing subcommand record&report, | |
331 | *we arrange module mmap prior to guest kernel mmap and trigger | |
332 | *a preload dso because default guest module symbols are loaded | |
333 | *from guest kallsyms instead of /lib/modules/XXX/XXX. This | |
334 | *method is used to avoid symbol missing when the first addr is | |
335 | *in module instead of in guest kernel. | |
336 | */ | |
d20deb64 | 337 | err = perf_event__synthesize_modules(ops, process_synthesized_event, |
8115d60c | 338 | psession, machine); |
a1645ce1 ZY |
339 | if (err < 0) |
340 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 341 | " relocation symbol.\n", machine->pid); |
a1645ce1 | 342 | |
a1645ce1 ZY |
343 | /* |
344 | * We use _stext for guest kernel because guest kernel's /proc/kallsyms | |
345 | * have no _text sometimes. | |
346 | */ | |
d20deb64 | 347 | err = perf_event__synthesize_kernel_mmap(ops, process_synthesized_event, |
8115d60c | 348 | psession, machine, "_text"); |
a1645ce1 | 349 | if (err < 0) |
d20deb64 | 350 | err = perf_event__synthesize_kernel_mmap(ops, process_synthesized_event, |
8115d60c ACM |
351 | psession, machine, |
352 | "_stext"); | |
a1645ce1 ZY |
353 | if (err < 0) |
354 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 355 | " relocation symbol.\n", machine->pid); |
a1645ce1 ZY |
356 | } |
357 | ||
98402807 FW |
358 | static struct perf_event_header finished_round_event = { |
359 | .size = sizeof(struct perf_event_header), | |
360 | .type = PERF_RECORD_FINISHED_ROUND, | |
361 | }; | |
362 | ||
d20deb64 | 363 | static void perf_record__mmap_read_all(struct perf_record *rec) |
98402807 | 364 | { |
0e2e63dd | 365 | int i; |
98402807 | 366 | |
d20deb64 ACM |
367 | for (i = 0; i < rec->evlist->nr_mmaps; i++) { |
368 | if (rec->evlist->mmap[i].base) | |
369 | perf_record__mmap_read(rec, &rec->evlist->mmap[i]); | |
98402807 FW |
370 | } |
371 | ||
d20deb64 ACM |
372 | if (perf_header__has_feat(&rec->session->header, HEADER_TRACE_INFO)) |
373 | write_output(rec, &finished_round_event, sizeof(finished_round_event)); | |
98402807 FW |
374 | } |
375 | ||
d20deb64 | 376 | static int __cmd_record(struct perf_record *rec, int argc, const char **argv) |
16c8a109 | 377 | { |
abaff32a | 378 | struct stat st; |
abaff32a | 379 | int flags; |
d20deb64 | 380 | int err, output; |
8b412664 | 381 | unsigned long waking = 0; |
46be604b | 382 | const bool forks = argc > 0; |
23346f21 | 383 | struct machine *machine; |
d20deb64 ACM |
384 | struct perf_event_ops *ops = &rec->ops; |
385 | struct perf_record_opts *opts = &rec->opts; | |
386 | struct perf_evlist *evsel_list = rec->evlist; | |
387 | const char *output_name = rec->output_name; | |
388 | struct perf_session *session; | |
de9ac07b | 389 | |
d20deb64 | 390 | rec->progname = argv[0]; |
33e49ea7 | 391 | |
d20deb64 | 392 | rec->page_size = sysconf(_SC_PAGE_SIZE); |
de9ac07b | 393 | |
d20deb64 | 394 | on_exit(perf_record__sig_exit, rec); |
f5970550 PZ |
395 | signal(SIGCHLD, sig_handler); |
396 | signal(SIGINT, sig_handler); | |
18483b81 | 397 | signal(SIGUSR1, sig_handler); |
f5970550 | 398 | |
d7065adb FBH |
399 | if (!output_name) { |
400 | if (!fstat(STDOUT_FILENO, &st) && S_ISFIFO(st.st_mode)) | |
d20deb64 | 401 | opts->pipe_output = true; |
d7065adb | 402 | else |
d20deb64 | 403 | rec->output_name = output_name = "perf.data"; |
d7065adb FBH |
404 | } |
405 | if (output_name) { | |
406 | if (!strcmp(output_name, "-")) | |
d20deb64 | 407 | opts->pipe_output = true; |
d7065adb | 408 | else if (!stat(output_name, &st) && st.st_size) { |
d20deb64 | 409 | if (rec->write_mode == WRITE_FORCE) { |
d7065adb FBH |
410 | char oldname[PATH_MAX]; |
411 | snprintf(oldname, sizeof(oldname), "%s.old", | |
412 | output_name); | |
413 | unlink(oldname); | |
414 | rename(output_name, oldname); | |
415 | } | |
d20deb64 ACM |
416 | } else if (rec->write_mode == WRITE_APPEND) { |
417 | rec->write_mode = WRITE_FORCE; | |
266e0e21 | 418 | } |
97124d5e PZ |
419 | } |
420 | ||
f887f301 | 421 | flags = O_CREAT|O_RDWR; |
d20deb64 ACM |
422 | if (rec->write_mode == WRITE_APPEND) |
423 | rec->file_new = 0; | |
abaff32a IM |
424 | else |
425 | flags |= O_TRUNC; | |
426 | ||
d20deb64 | 427 | if (opts->pipe_output) |
529870e3 TZ |
428 | output = STDOUT_FILENO; |
429 | else | |
430 | output = open(output_name, flags, S_IRUSR | S_IWUSR); | |
de9ac07b PZ |
431 | if (output < 0) { |
432 | perror("failed to create output file"); | |
433 | exit(-1); | |
434 | } | |
435 | ||
d20deb64 ACM |
436 | rec->output = output; |
437 | ||
7865e817 | 438 | session = perf_session__new(output_name, O_WRONLY, |
d20deb64 | 439 | rec->write_mode == WRITE_FORCE, false, NULL); |
94c744b6 | 440 | if (session == NULL) { |
a9a70bbc ACM |
441 | pr_err("Not enough memory for reading perf file header\n"); |
442 | return -1; | |
443 | } | |
444 | ||
d20deb64 ACM |
445 | rec->session = session; |
446 | ||
447 | if (!rec->no_buildid) | |
baa2f6ce ACM |
448 | perf_header__set_feat(&session->header, HEADER_BUILD_ID); |
449 | ||
d20deb64 | 450 | if (!rec->file_new) { |
a91e5431 | 451 | err = perf_session__read_header(session, output); |
4dc0a04b | 452 | if (err < 0) |
39d17dac | 453 | goto out_delete_session; |
4dc0a04b ACM |
454 | } |
455 | ||
361c99a6 | 456 | if (have_tracepoints(&evsel_list->entries)) |
94c744b6 | 457 | perf_header__set_feat(&session->header, HEADER_TRACE_INFO); |
03456a15 | 458 | |
fbe96f29 SE |
459 | perf_header__set_feat(&session->header, HEADER_HOSTNAME); |
460 | perf_header__set_feat(&session->header, HEADER_OSRELEASE); | |
461 | perf_header__set_feat(&session->header, HEADER_ARCH); | |
462 | perf_header__set_feat(&session->header, HEADER_CPUDESC); | |
463 | perf_header__set_feat(&session->header, HEADER_NRCPUS); | |
464 | perf_header__set_feat(&session->header, HEADER_EVENT_DESC); | |
465 | perf_header__set_feat(&session->header, HEADER_CMDLINE); | |
466 | perf_header__set_feat(&session->header, HEADER_VERSION); | |
467 | perf_header__set_feat(&session->header, HEADER_CPU_TOPOLOGY); | |
468 | perf_header__set_feat(&session->header, HEADER_TOTAL_MEM); | |
469 | perf_header__set_feat(&session->header, HEADER_NUMA_TOPOLOGY); | |
470 | perf_header__set_feat(&session->header, HEADER_CPUID); | |
471 | ||
d4db3f16 | 472 | if (forks) { |
d20deb64 | 473 | err = perf_evlist__prepare_workload(evsel_list, opts, argv); |
35b9d88e ACM |
474 | if (err < 0) { |
475 | pr_err("Couldn't run the workload!\n"); | |
476 | goto out_delete_session; | |
856e9660 | 477 | } |
856e9660 PZ |
478 | } |
479 | ||
d20deb64 | 480 | perf_record__open(rec); |
de9ac07b | 481 | |
712a4b60 | 482 | /* |
d20deb64 | 483 | * perf_session__delete(session) will be called at perf_record__exit() |
712a4b60 | 484 | */ |
d20deb64 | 485 | on_exit(perf_record__exit, rec); |
712a4b60 | 486 | |
d20deb64 | 487 | if (opts->pipe_output) { |
529870e3 TZ |
488 | err = perf_header__write_pipe(output); |
489 | if (err < 0) | |
490 | return err; | |
d20deb64 | 491 | } else if (rec->file_new) { |
a91e5431 ACM |
492 | err = perf_session__write_header(session, evsel_list, |
493 | output, false); | |
d5eed904 ACM |
494 | if (err < 0) |
495 | return err; | |
56b03f3c ACM |
496 | } |
497 | ||
d20deb64 | 498 | rec->post_processing_offset = lseek(output, 0, SEEK_CUR); |
6122e4e4 | 499 | |
d20deb64 ACM |
500 | if (opts->pipe_output) { |
501 | err = perf_event__synthesize_attrs(ops, session, | |
502 | process_synthesized_event); | |
2c46dbb5 TZ |
503 | if (err < 0) { |
504 | pr_err("Couldn't synthesize attrs.\n"); | |
505 | return err; | |
506 | } | |
cd19a035 | 507 | |
d20deb64 | 508 | err = perf_event__synthesize_event_types(ops, process_synthesized_event, |
8115d60c | 509 | session); |
cd19a035 TZ |
510 | if (err < 0) { |
511 | pr_err("Couldn't synthesize event_types.\n"); | |
512 | return err; | |
513 | } | |
9215545e | 514 | |
361c99a6 | 515 | if (have_tracepoints(&evsel_list->entries)) { |
63e0c771 TZ |
516 | /* |
517 | * FIXME err <= 0 here actually means that | |
518 | * there were no tracepoints so its not really | |
519 | * an error, just that we don't need to | |
520 | * synthesize anything. We really have to | |
521 | * return this more properly and also | |
522 | * propagate errors that now are calling die() | |
523 | */ | |
d20deb64 | 524 | err = perf_event__synthesize_tracing_data(ops, output, evsel_list, |
8115d60c ACM |
525 | process_synthesized_event, |
526 | session); | |
63e0c771 TZ |
527 | if (err <= 0) { |
528 | pr_err("Couldn't record tracing data.\n"); | |
529 | return err; | |
530 | } | |
d20deb64 | 531 | advance_output(rec, err); |
63e0c771 | 532 | } |
2c46dbb5 TZ |
533 | } |
534 | ||
23346f21 ACM |
535 | machine = perf_session__find_host_machine(session); |
536 | if (!machine) { | |
a1645ce1 ZY |
537 | pr_err("Couldn't find native kernel information.\n"); |
538 | return -1; | |
539 | } | |
540 | ||
d20deb64 | 541 | err = perf_event__synthesize_kernel_mmap(ops, process_synthesized_event, |
8115d60c | 542 | session, machine, "_text"); |
70162138 | 543 | if (err < 0) |
d20deb64 | 544 | err = perf_event__synthesize_kernel_mmap(ops, process_synthesized_event, |
8115d60c | 545 | session, machine, "_stext"); |
c1a3a4b9 ACM |
546 | if (err < 0) |
547 | pr_err("Couldn't record kernel reference relocation symbol\n" | |
548 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
549 | "Check /proc/kallsyms permission or run as root.\n"); | |
b7cece76 | 550 | |
d20deb64 | 551 | err = perf_event__synthesize_modules(ops, process_synthesized_event, |
8115d60c | 552 | session, machine); |
c1a3a4b9 ACM |
553 | if (err < 0) |
554 | pr_err("Couldn't record kernel module information.\n" | |
555 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
556 | "Check /proc/modules permission or run as root.\n"); | |
557 | ||
a1645ce1 | 558 | if (perf_guest) |
d20deb64 | 559 | perf_session__process_machines(session, ops, |
8115d60c | 560 | perf_event__synthesize_guest_os); |
7c6a1c65 | 561 | |
d20deb64 ACM |
562 | if (!opts->system_wide) |
563 | perf_event__synthesize_thread_map(ops, evsel_list->threads, | |
7c940c18 ACM |
564 | process_synthesized_event, |
565 | session); | |
234fbbf5 | 566 | else |
d20deb64 | 567 | perf_event__synthesize_threads(ops, process_synthesized_event, |
8115d60c | 568 | session); |
7c6a1c65 | 569 | |
d20deb64 | 570 | if (rec->realtime_prio) { |
de9ac07b PZ |
571 | struct sched_param param; |
572 | ||
d20deb64 | 573 | param.sched_priority = rec->realtime_prio; |
de9ac07b | 574 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { |
6beba7ad | 575 | pr_err("Could not set realtime priority.\n"); |
de9ac07b PZ |
576 | exit(-1); |
577 | } | |
578 | } | |
579 | ||
764e16a3 DA |
580 | perf_evlist__enable(evsel_list); |
581 | ||
856e9660 PZ |
582 | /* |
583 | * Let the child rip | |
584 | */ | |
d4db3f16 | 585 | if (forks) |
35b9d88e | 586 | perf_evlist__start_workload(evsel_list); |
856e9660 | 587 | |
649c48a9 | 588 | for (;;) { |
d20deb64 | 589 | int hits = rec->samples; |
de9ac07b | 590 | |
d20deb64 | 591 | perf_record__mmap_read_all(rec); |
de9ac07b | 592 | |
d20deb64 | 593 | if (hits == rec->samples) { |
649c48a9 PZ |
594 | if (done) |
595 | break; | |
5c581041 | 596 | err = poll(evsel_list->pollfd, evsel_list->nr_fds, -1); |
8b412664 PZ |
597 | waking++; |
598 | } | |
599 | ||
4152ab37 ACM |
600 | if (done) |
601 | perf_evlist__disable(evsel_list); | |
de9ac07b PZ |
602 | } |
603 | ||
18483b81 | 604 | if (quiet || signr == SIGUSR1) |
b44308f5 ACM |
605 | return 0; |
606 | ||
8b412664 PZ |
607 | fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); |
608 | ||
021e9f47 IM |
609 | /* |
610 | * Approximate RIP event size: 24 bytes. | |
611 | */ | |
612 | fprintf(stderr, | |
9486aa38 | 613 | "[ perf record: Captured and wrote %.3f MB %s (~%" PRIu64 " samples) ]\n", |
d20deb64 | 614 | (double)rec->bytes_written / 1024.0 / 1024.0, |
021e9f47 | 615 | output_name, |
d20deb64 | 616 | rec->bytes_written / 24); |
addc2785 | 617 | |
de9ac07b | 618 | return 0; |
39d17dac ACM |
619 | |
620 | out_delete_session: | |
621 | perf_session__delete(session); | |
622 | return err; | |
de9ac07b | 623 | } |
0e9b20b8 | 624 | |
0e9b20b8 | 625 | static const char * const record_usage[] = { |
9e096753 MG |
626 | "perf record [<options>] [<command>]", |
627 | "perf record [<options>] -- <command> [<options>]", | |
0e9b20b8 IM |
628 | NULL |
629 | }; | |
630 | ||
d20deb64 ACM |
631 | /* |
632 | * XXX Ideally would be local to cmd_record() and passed to a perf_record__new | |
633 | * because we need to have access to it in perf_record__exit, that is called | |
634 | * after cmd_record() exits, but since record_options need to be accessible to | |
635 | * builtin-script, leave it here. | |
636 | * | |
637 | * At least we don't ouch it in all the other functions here directly. | |
638 | * | |
639 | * Just say no to tons of global variables, sigh. | |
640 | */ | |
641 | static struct perf_record record = { | |
642 | .opts = { | |
643 | .target_pid = -1, | |
644 | .target_tid = -1, | |
645 | .mmap_pages = UINT_MAX, | |
646 | .user_freq = UINT_MAX, | |
647 | .user_interval = ULLONG_MAX, | |
648 | .freq = 1000, | |
649 | .sample_id_all_avail = true, | |
650 | }, | |
651 | .write_mode = WRITE_FORCE, | |
652 | .file_new = true, | |
653 | }; | |
7865e817 | 654 | |
d20deb64 ACM |
655 | /* |
656 | * XXX Will stay a global variable till we fix builtin-script.c to stop messing | |
657 | * with it and switch to use the library functions in perf_evlist that came | |
658 | * from builtin-record.c, i.e. use perf_record_opts, | |
659 | * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record', | |
660 | * using pipes, etc. | |
661 | */ | |
bca647aa | 662 | const struct option record_options[] = { |
d20deb64 | 663 | OPT_CALLBACK('e', "event", &record.evlist, "event", |
86847b62 | 664 | "event selector. use 'perf list' to list available events", |
f120f9d5 | 665 | parse_events_option), |
d20deb64 | 666 | OPT_CALLBACK(0, "filter", &record.evlist, "filter", |
c171b552 | 667 | "event filter", parse_filter), |
d20deb64 | 668 | OPT_INTEGER('p', "pid", &record.opts.target_pid, |
d6d901c2 | 669 | "record events on existing process id"), |
d20deb64 | 670 | OPT_INTEGER('t', "tid", &record.opts.target_tid, |
d6d901c2 | 671 | "record events on existing thread id"), |
d20deb64 | 672 | OPT_INTEGER('r', "realtime", &record.realtime_prio, |
0e9b20b8 | 673 | "collect data with this RT SCHED_FIFO priority"), |
d20deb64 | 674 | OPT_BOOLEAN('D', "no-delay", &record.opts.no_delay, |
acac03fa | 675 | "collect data without buffering"), |
d20deb64 | 676 | OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples, |
daac07b2 | 677 | "collect raw sample records from all opened counters"), |
d20deb64 | 678 | OPT_BOOLEAN('a', "all-cpus", &record.opts.system_wide, |
0e9b20b8 | 679 | "system-wide collection from all CPUs"), |
d20deb64 | 680 | OPT_BOOLEAN('A', "append", &record.append_file, |
abaff32a | 681 | "append to the output file to do incremental profiling"), |
d20deb64 | 682 | OPT_STRING('C', "cpu", &record.opts.cpu_list, "cpu", |
c45c6ea2 | 683 | "list of cpus to monitor"), |
d20deb64 | 684 | OPT_BOOLEAN('f', "force", &record.force, |
7865e817 | 685 | "overwrite existing data file (deprecated)"), |
d20deb64 ACM |
686 | OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"), |
687 | OPT_STRING('o', "output", &record.output_name, "file", | |
abaff32a | 688 | "output file name"), |
d20deb64 | 689 | OPT_BOOLEAN('i', "no-inherit", &record.opts.no_inherit, |
2e6cdf99 | 690 | "child tasks do not inherit counters"), |
d20deb64 ACM |
691 | OPT_UINTEGER('F', "freq", &record.opts.user_freq, "profile at this frequency"), |
692 | OPT_UINTEGER('m', "mmap-pages", &record.opts.mmap_pages, | |
01c2d99b | 693 | "number of mmap data pages"), |
d20deb64 | 694 | OPT_BOOLEAN(0, "group", &record.opts.group, |
43bece79 | 695 | "put the counters into a counter group"), |
d20deb64 | 696 | OPT_BOOLEAN('g', "call-graph", &record.opts.call_graph, |
3efa1cc9 | 697 | "do call-graph (stack chain/backtrace) recording"), |
c0555642 | 698 | OPT_INCR('v', "verbose", &verbose, |
3da297a6 | 699 | "be more verbose (show counter open errors, etc)"), |
b44308f5 | 700 | OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"), |
d20deb64 | 701 | OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat, |
649c48a9 | 702 | "per thread counts"), |
d20deb64 | 703 | OPT_BOOLEAN('d', "data", &record.opts.sample_address, |
4bba828d | 704 | "Sample addresses"), |
d20deb64 ACM |
705 | OPT_BOOLEAN('T', "timestamp", &record.opts.sample_time, "Sample timestamps"), |
706 | OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples, | |
649c48a9 | 707 | "don't sample"), |
d20deb64 | 708 | OPT_BOOLEAN('N', "no-buildid-cache", &record.no_buildid_cache, |
a1ac1d3c | 709 | "do not update the buildid cache"), |
d20deb64 | 710 | OPT_BOOLEAN('B', "no-buildid", &record.no_buildid, |
baa2f6ce | 711 | "do not collect buildids in perf.data"), |
d20deb64 | 712 | OPT_CALLBACK('G', "cgroup", &record.evlist, "name", |
023695d9 SE |
713 | "monitor event in cgroup name only", |
714 | parse_cgroups), | |
0e9b20b8 IM |
715 | OPT_END() |
716 | }; | |
717 | ||
f37a291c | 718 | int cmd_record(int argc, const char **argv, const char *prefix __used) |
0e9b20b8 | 719 | { |
69aad6f1 ACM |
720 | int err = -ENOMEM; |
721 | struct perf_evsel *pos; | |
d20deb64 ACM |
722 | struct perf_evlist *evsel_list; |
723 | struct perf_record *rec = &record; | |
0e9b20b8 | 724 | |
fbe96f29 SE |
725 | perf_header__set_cmdline(argc, argv); |
726 | ||
7e2ed097 | 727 | evsel_list = perf_evlist__new(NULL, NULL); |
361c99a6 ACM |
728 | if (evsel_list == NULL) |
729 | return -ENOMEM; | |
730 | ||
d20deb64 ACM |
731 | rec->evlist = evsel_list; |
732 | ||
bca647aa | 733 | argc = parse_options(argc, argv, record_options, record_usage, |
655000e7 | 734 | PARSE_OPT_STOP_AT_NON_OPTION); |
d20deb64 ACM |
735 | if (!argc && rec->opts.target_pid == -1 && rec->opts.target_tid == -1 && |
736 | !rec->opts.system_wide && !rec->opts.cpu_list) | |
bca647aa | 737 | usage_with_options(record_usage, record_options); |
0e9b20b8 | 738 | |
d20deb64 | 739 | if (rec->force && rec->append_file) { |
7865e817 FW |
740 | fprintf(stderr, "Can't overwrite and append at the same time." |
741 | " You need to choose between -f and -A"); | |
bca647aa | 742 | usage_with_options(record_usage, record_options); |
d20deb64 ACM |
743 | } else if (rec->append_file) { |
744 | rec->write_mode = WRITE_APPEND; | |
7865e817 | 745 | } else { |
d20deb64 | 746 | rec->write_mode = WRITE_FORCE; |
7865e817 FW |
747 | } |
748 | ||
d20deb64 | 749 | if (nr_cgroups && !rec->opts.system_wide) { |
023695d9 SE |
750 | fprintf(stderr, "cgroup monitoring only available in" |
751 | " system-wide mode\n"); | |
752 | usage_with_options(record_usage, record_options); | |
753 | } | |
754 | ||
655000e7 | 755 | symbol__init(); |
baa2f6ce | 756 | |
ec80fde7 | 757 | if (symbol_conf.kptr_restrict) |
646aaea6 ACM |
758 | pr_warning( |
759 | "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n" | |
760 | "check /proc/sys/kernel/kptr_restrict.\n\n" | |
761 | "Samples in kernel functions may not be resolved if a suitable vmlinux\n" | |
762 | "file is not found in the buildid cache or in the vmlinux path.\n\n" | |
763 | "Samples in kernel modules won't be resolved at all.\n\n" | |
764 | "If some relocation was applied (e.g. kexec) symbols may be misresolved\n" | |
765 | "even with a suitable vmlinux or kallsyms file.\n\n"); | |
ec80fde7 | 766 | |
d20deb64 | 767 | if (rec->no_buildid_cache || rec->no_buildid) |
a1ac1d3c | 768 | disable_buildid_cache(); |
655000e7 | 769 | |
361c99a6 ACM |
770 | if (evsel_list->nr_entries == 0 && |
771 | perf_evlist__add_default(evsel_list) < 0) { | |
69aad6f1 ACM |
772 | pr_err("Not enough memory for event selector list\n"); |
773 | goto out_symbol_exit; | |
bbd36e5e | 774 | } |
0e9b20b8 | 775 | |
d20deb64 ACM |
776 | if (rec->opts.target_pid != -1) |
777 | rec->opts.target_tid = rec->opts.target_pid; | |
d6d901c2 | 778 | |
d20deb64 ACM |
779 | if (perf_evlist__create_maps(evsel_list, rec->opts.target_pid, |
780 | rec->opts.target_tid, rec->opts.cpu_list) < 0) | |
dd7927f4 | 781 | usage_with_options(record_usage, record_options); |
69aad6f1 | 782 | |
361c99a6 | 783 | list_for_each_entry(pos, &evsel_list->entries, node) { |
7e2ed097 ACM |
784 | if (perf_evsel__alloc_fd(pos, evsel_list->cpus->nr, |
785 | evsel_list->threads->nr) < 0) | |
69aad6f1 | 786 | goto out_free_fd; |
ad7f4e3f ACM |
787 | if (perf_header__push_event(pos->attr.config, event_name(pos))) |
788 | goto out_free_fd; | |
d6d901c2 | 789 | } |
5c581041 | 790 | |
7e2ed097 | 791 | if (perf_evlist__alloc_pollfd(evsel_list) < 0) |
39d17dac | 792 | goto out_free_fd; |
d6d901c2 | 793 | |
d20deb64 ACM |
794 | if (rec->opts.user_interval != ULLONG_MAX) |
795 | rec->opts.default_interval = rec->opts.user_interval; | |
796 | if (rec->opts.user_freq != UINT_MAX) | |
797 | rec->opts.freq = rec->opts.user_freq; | |
f9212819 | 798 | |
7e4ff9e3 MG |
799 | /* |
800 | * User specified count overrides default frequency. | |
801 | */ | |
d20deb64 ACM |
802 | if (rec->opts.default_interval) |
803 | rec->opts.freq = 0; | |
804 | else if (rec->opts.freq) { | |
805 | rec->opts.default_interval = rec->opts.freq; | |
7e4ff9e3 MG |
806 | } else { |
807 | fprintf(stderr, "frequency and count are zero, aborting\n"); | |
39d17dac | 808 | err = -EINVAL; |
5c581041 | 809 | goto out_free_fd; |
7e4ff9e3 MG |
810 | } |
811 | ||
d20deb64 | 812 | err = __cmd_record(&record, argc, argv); |
39d17dac | 813 | out_free_fd: |
7e2ed097 | 814 | perf_evlist__delete_maps(evsel_list); |
d65a458b ACM |
815 | out_symbol_exit: |
816 | symbol__exit(); | |
39d17dac | 817 | return err; |
0e9b20b8 | 818 | } |