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 | ||
3de29cab SE |
38 | static u64 user_interval = ULLONG_MAX; |
39 | static u64 default_interval = 0; | |
a21ca2ca | 40 | |
de9ac07b | 41 | static unsigned int page_size; |
800cd25c | 42 | static unsigned int mmap_pages = UINT_MAX; |
f9212819 | 43 | static unsigned int user_freq = UINT_MAX; |
42e59d7d | 44 | static int freq = 1000; |
de9ac07b | 45 | static int output; |
529870e3 | 46 | static int pipe_output = 0; |
d7065adb | 47 | static const char *output_name = NULL; |
43bece79 | 48 | static bool group = false; |
1967936d | 49 | static int realtime_prio = 0; |
acac03fa | 50 | static bool nodelay = false; |
c0555642 | 51 | static bool raw_samples = false; |
9c90a61c | 52 | static bool sample_id_all_avail = true; |
c0555642 | 53 | static bool system_wide = false; |
42e59d7d | 54 | static pid_t target_pid = -1; |
d6d901c2 | 55 | static pid_t target_tid = -1; |
42e59d7d | 56 | static pid_t child_pid = -1; |
2e6cdf99 | 57 | static bool no_inherit = false; |
7865e817 | 58 | static enum write_mode_t write_mode = WRITE_FORCE; |
c0555642 IM |
59 | static bool call_graph = false; |
60 | static bool inherit_stat = false; | |
61 | static bool no_samples = false; | |
62 | static bool sample_address = false; | |
9c90a61c | 63 | static bool sample_time = false; |
a1ac1d3c | 64 | static bool no_buildid = false; |
baa2f6ce | 65 | static bool no_buildid_cache = false; |
361c99a6 | 66 | static struct perf_evlist *evsel_list; |
42e59d7d IM |
67 | |
68 | static long samples = 0; | |
42e59d7d | 69 | static u64 bytes_written = 0; |
a21ca2ca | 70 | |
42e59d7d | 71 | static int file_new = 1; |
6122e4e4 | 72 | static off_t post_processing_offset; |
7c6a1c65 | 73 | |
94c744b6 | 74 | static struct perf_session *session; |
c45c6ea2 | 75 | static const char *cpu_list; |
33e49ea7 | 76 | static const char *progname; |
f5970550 | 77 | |
9215545e TZ |
78 | static void advance_output(size_t size) |
79 | { | |
80 | bytes_written += size; | |
81 | } | |
82 | ||
f5970550 PZ |
83 | static void write_output(void *buf, size_t size) |
84 | { | |
85 | while (size) { | |
86 | int ret = write(output, buf, size); | |
87 | ||
88 | if (ret < 0) | |
89 | die("failed to write"); | |
90 | ||
91 | size -= ret; | |
92 | buf += ret; | |
93 | ||
94 | bytes_written += ret; | |
95 | } | |
96 | } | |
97 | ||
8115d60c | 98 | static int process_synthesized_event(union perf_event *event, |
8d50e5b4 | 99 | struct perf_sample *sample __used, |
d8f66248 | 100 | struct perf_session *self __used) |
234fbbf5 | 101 | { |
6122e4e4 | 102 | write_output(event, event->header.size); |
234fbbf5 ACM |
103 | return 0; |
104 | } | |
105 | ||
744bd8aa | 106 | static void mmap_read(struct perf_mmap *md) |
de9ac07b | 107 | { |
744bd8aa | 108 | unsigned int head = perf_mmap__read_head(md); |
de9ac07b PZ |
109 | unsigned int old = md->prev; |
110 | unsigned char *data = md->base + page_size; | |
111 | unsigned long size; | |
112 | void *buf; | |
de9ac07b | 113 | |
dc82009a ACM |
114 | if (old == head) |
115 | return; | |
116 | ||
117 | samples++; | |
de9ac07b PZ |
118 | |
119 | size = head - old; | |
120 | ||
121 | if ((old & md->mask) + size != (head & md->mask)) { | |
122 | buf = &data[old & md->mask]; | |
123 | size = md->mask + 1 - (old & md->mask); | |
124 | old += size; | |
021e9f47 | 125 | |
6122e4e4 | 126 | write_output(buf, size); |
de9ac07b PZ |
127 | } |
128 | ||
129 | buf = &data[old & md->mask]; | |
130 | size = head - old; | |
131 | old += size; | |
021e9f47 | 132 | |
6122e4e4 | 133 | write_output(buf, size); |
de9ac07b PZ |
134 | |
135 | md->prev = old; | |
115d2d89 | 136 | perf_mmap__write_tail(md, old); |
de9ac07b PZ |
137 | } |
138 | ||
139 | static volatile int done = 0; | |
f7b7c26e | 140 | static volatile int signr = -1; |
33e49ea7 | 141 | static volatile int child_finished = 0; |
de9ac07b | 142 | |
16c8a109 | 143 | static void sig_handler(int sig) |
de9ac07b | 144 | { |
33e49ea7 AK |
145 | if (sig == SIGCHLD) |
146 | child_finished = 1; | |
147 | ||
16c8a109 | 148 | done = 1; |
f7b7c26e PZ |
149 | signr = sig; |
150 | } | |
151 | ||
152 | static void sig_atexit(void) | |
153 | { | |
33e49ea7 AK |
154 | int status; |
155 | ||
156 | if (child_pid > 0) { | |
157 | if (!child_finished) | |
158 | kill(child_pid, SIGTERM); | |
159 | ||
160 | wait(&status); | |
161 | if (WIFSIGNALED(status)) | |
162 | psignal(WTERMSIG(status), progname); | |
163 | } | |
933da83a | 164 | |
18483b81 | 165 | if (signr == -1 || signr == SIGUSR1) |
f7b7c26e PZ |
166 | return; |
167 | ||
168 | signal(signr, SIG_DFL); | |
169 | kill(getpid(), signr); | |
de9ac07b PZ |
170 | } |
171 | ||
dd7927f4 ACM |
172 | static void config_attr(struct perf_evsel *evsel, struct perf_evlist *evlist) |
173 | { | |
174 | struct perf_event_attr *attr = &evsel->attr; | |
175 | int track = !evsel->idx; /* only the first counter needs these */ | |
7c6a1c65 | 176 | |
5d2cd909 | 177 | attr->inherit = !no_inherit; |
7c6a1c65 PZ |
178 | attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | |
179 | PERF_FORMAT_TOTAL_TIME_RUNNING | | |
180 | PERF_FORMAT_ID; | |
16c8a109 | 181 | |
3a9f131f | 182 | attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID; |
3efa1cc9 | 183 | |
361c99a6 | 184 | if (evlist->nr_entries > 1) |
8907fd60 EM |
185 | attr->sample_type |= PERF_SAMPLE_ID; |
186 | ||
f9212819 FW |
187 | /* |
188 | * We default some events to a 1 default interval. But keep | |
189 | * it a weak assumption overridable by the user. | |
190 | */ | |
191 | if (!attr->sample_period || (user_freq != UINT_MAX && | |
3de29cab | 192 | user_interval != ULLONG_MAX)) { |
f9212819 FW |
193 | if (freq) { |
194 | attr->sample_type |= PERF_SAMPLE_PERIOD; | |
195 | attr->freq = 1; | |
196 | attr->sample_freq = freq; | |
197 | } else { | |
198 | attr->sample_period = default_interval; | |
199 | } | |
1dba15e7 | 200 | } |
3efa1cc9 | 201 | |
649c48a9 PZ |
202 | if (no_samples) |
203 | attr->sample_freq = 0; | |
204 | ||
205 | if (inherit_stat) | |
206 | attr->inherit_stat = 1; | |
207 | ||
3af9e859 | 208 | if (sample_address) { |
4bba828d | 209 | attr->sample_type |= PERF_SAMPLE_ADDR; |
3af9e859 EM |
210 | attr->mmap_data = track; |
211 | } | |
4bba828d | 212 | |
3efa1cc9 IM |
213 | if (call_graph) |
214 | attr->sample_type |= PERF_SAMPLE_CALLCHAIN; | |
215 | ||
f60f3593 AS |
216 | if (system_wide) |
217 | attr->sample_type |= PERF_SAMPLE_CPU; | |
218 | ||
a43d3f08 ACM |
219 | if (sample_id_all_avail && |
220 | (sample_time || system_wide || !no_inherit || cpu_list)) | |
9c90a61c ACM |
221 | attr->sample_type |= PERF_SAMPLE_TIME; |
222 | ||
cd6feeea | 223 | if (raw_samples) { |
6ddf259d | 224 | attr->sample_type |= PERF_SAMPLE_TIME; |
daac07b2 | 225 | attr->sample_type |= PERF_SAMPLE_RAW; |
cd6feeea IM |
226 | attr->sample_type |= PERF_SAMPLE_CPU; |
227 | } | |
f413cdb8 | 228 | |
acac03fa KS |
229 | if (nodelay) { |
230 | attr->watermark = 0; | |
231 | attr->wakeup_events = 1; | |
232 | } | |
233 | ||
a21ca2ca IM |
234 | attr->mmap = track; |
235 | attr->comm = track; | |
dd7927f4 | 236 | |
2e6cdf99 | 237 | if (target_pid == -1 && target_tid == -1 && !system_wide) { |
46be604b | 238 | attr->disabled = 1; |
bedbfdea | 239 | attr->enable_on_exec = 1; |
46be604b | 240 | } |
dd7927f4 | 241 | } |
bedbfdea | 242 | |
a91e5431 ACM |
243 | static bool perf_evlist__equal(struct perf_evlist *evlist, |
244 | struct perf_evlist *other) | |
245 | { | |
246 | struct perf_evsel *pos, *pair; | |
247 | ||
248 | if (evlist->nr_entries != other->nr_entries) | |
249 | return false; | |
250 | ||
251 | pair = list_entry(other->entries.next, struct perf_evsel, node); | |
252 | ||
253 | list_for_each_entry(pos, &evlist->entries, node) { | |
254 | if (memcmp(&pos->attr, &pair->attr, sizeof(pos->attr) != 0)) | |
255 | return false; | |
256 | pair = list_entry(pair->node.next, struct perf_evsel, node); | |
257 | } | |
258 | ||
259 | return true; | |
260 | } | |
261 | ||
dd7927f4 ACM |
262 | static void open_counters(struct perf_evlist *evlist) |
263 | { | |
264 | struct perf_evsel *pos; | |
dd7927f4 | 265 | |
5d2cd909 ACM |
266 | if (evlist->cpus->map[0] < 0) |
267 | no_inherit = true; | |
268 | ||
dd7927f4 ACM |
269 | list_for_each_entry(pos, &evlist->entries, node) { |
270 | struct perf_event_attr *attr = &pos->attr; | |
271 | /* | |
272 | * Check if parse_single_tracepoint_event has already asked for | |
273 | * PERF_SAMPLE_TIME. | |
274 | * | |
275 | * XXX this is kludgy but short term fix for problems introduced by | |
276 | * eac23d1c that broke 'perf script' by having different sample_types | |
277 | * when using multiple tracepoint events when we use a perf binary | |
278 | * that tries to use sample_id_all on an older kernel. | |
279 | * | |
280 | * We need to move counter creation to perf_session, support | |
281 | * different sample_types, etc. | |
282 | */ | |
283 | bool time_needed = attr->sample_type & PERF_SAMPLE_TIME; | |
d6d901c2 | 284 | |
dd7927f4 ACM |
285 | config_attr(pos, evlist); |
286 | retry_sample_id: | |
287 | attr->sample_id_all = sample_id_all_avail ? 1 : 0; | |
288 | try_again: | |
5d2cd909 | 289 | if (perf_evsel__open(pos, evlist->cpus, evlist->threads, group) < 0) { |
d6d901c2 ZY |
290 | int err = errno; |
291 | ||
c286c419 ACM |
292 | if (err == EPERM || err == EACCES) { |
293 | ui__warning_paranoid(); | |
294 | exit(EXIT_FAILURE); | |
295 | } else if (err == ENODEV && cpu_list) { | |
d6d901c2 ZY |
296 | die("No such device - did you specify" |
297 | " an out-of-range profile CPU?\n"); | |
9c90a61c ACM |
298 | } else if (err == EINVAL && sample_id_all_avail) { |
299 | /* | |
300 | * Old kernel, no attr->sample_id_type_all field | |
301 | */ | |
302 | sample_id_all_avail = false; | |
a43d3f08 | 303 | if (!sample_time && !raw_samples && !time_needed) |
eac23d1c IM |
304 | attr->sample_type &= ~PERF_SAMPLE_TIME; |
305 | ||
9c90a61c | 306 | goto retry_sample_id; |
d6d901c2 | 307 | } |
3da297a6 | 308 | |
d6d901c2 ZY |
309 | /* |
310 | * If it's cycles then fall back to hrtimer | |
311 | * based cpu-clock-tick sw counter, which | |
312 | * is always available even if no PMU support: | |
313 | */ | |
314 | if (attr->type == PERF_TYPE_HARDWARE | |
315 | && attr->config == PERF_COUNT_HW_CPU_CYCLES) { | |
316 | ||
317 | if (verbose) | |
ca6a4258 DA |
318 | ui__warning("The cycles event is not supported, " |
319 | "trying to fall back to cpu-clock-ticks\n"); | |
d6d901c2 ZY |
320 | attr->type = PERF_TYPE_SOFTWARE; |
321 | attr->config = PERF_COUNT_SW_CPU_CLOCK; | |
322 | goto try_again; | |
323 | } | |
ca6a4258 DA |
324 | |
325 | if (err == ENOENT) { | |
326 | ui__warning("The %s event is not supported.\n", | |
327 | event_name(pos)); | |
328 | exit(EXIT_FAILURE); | |
329 | } | |
330 | ||
d6d901c2 | 331 | printf("\n"); |
d9cf837e | 332 | error("sys_perf_event_open() syscall returned with %d (%s). /bin/dmesg may provide additional information.\n", |
dd7927f4 | 333 | err, strerror(err)); |
bfd45118 SK |
334 | |
335 | #if defined(__i386__) || defined(__x86_64__) | |
d6d901c2 ZY |
336 | if (attr->type == PERF_TYPE_HARDWARE && err == EOPNOTSUPP) |
337 | die("No hardware sampling interrupt available." | |
338 | " No APIC? If so then you can boot the kernel" | |
339 | " with the \"lapic\" boot parameter to" | |
340 | " force-enable it.\n"); | |
bfd45118 SK |
341 | #endif |
342 | ||
d6d901c2 | 343 | die("No CONFIG_PERF_EVENTS=y kernel support configured?\n"); |
c171b552 LZ |
344 | } |
345 | } | |
a43d3f08 | 346 | |
0a102479 FW |
347 | if (perf_evlist__set_filters(evlist)) { |
348 | error("failed to set filter with %d (%s)\n", errno, | |
349 | strerror(errno)); | |
350 | exit(-1); | |
351 | } | |
352 | ||
7e2ed097 | 353 | if (perf_evlist__mmap(evlist, mmap_pages, false) < 0) |
0a27d7f9 ACM |
354 | die("failed to mmap with %d (%s)\n", errno, strerror(errno)); |
355 | ||
a91e5431 ACM |
356 | if (file_new) |
357 | session->evlist = evlist; | |
358 | else { | |
359 | if (!perf_evlist__equal(session->evlist, evlist)) { | |
360 | fprintf(stderr, "incompatible append\n"); | |
361 | exit(-1); | |
362 | } | |
363 | } | |
364 | ||
365 | perf_session__update_sample_type(session); | |
16c8a109 PZ |
366 | } |
367 | ||
6122e4e4 ACM |
368 | static int process_buildids(void) |
369 | { | |
370 | u64 size = lseek(output, 0, SEEK_CUR); | |
371 | ||
9f591fd7 ACM |
372 | if (size == 0) |
373 | return 0; | |
374 | ||
6122e4e4 ACM |
375 | session->fd = output; |
376 | return __perf_session__process_events(session, post_processing_offset, | |
377 | size - post_processing_offset, | |
378 | size, &build_id__mark_dso_hit_ops); | |
379 | } | |
380 | ||
f5970550 PZ |
381 | static void atexit_header(void) |
382 | { | |
c7929e47 TZ |
383 | if (!pipe_output) { |
384 | session->header.data_size += bytes_written; | |
f5970550 | 385 | |
baa2f6ce ACM |
386 | if (!no_buildid) |
387 | process_buildids(); | |
a91e5431 | 388 | perf_session__write_header(session, evsel_list, output, true); |
39d17dac | 389 | perf_session__delete(session); |
361c99a6 | 390 | perf_evlist__delete(evsel_list); |
d65a458b | 391 | symbol__exit(); |
c7929e47 | 392 | } |
f5970550 PZ |
393 | } |
394 | ||
8115d60c | 395 | static void perf_event__synthesize_guest_os(struct machine *machine, void *data) |
a1645ce1 ZY |
396 | { |
397 | int err; | |
23346f21 | 398 | struct perf_session *psession = data; |
a1645ce1 | 399 | |
23346f21 | 400 | if (machine__is_host(machine)) |
a1645ce1 ZY |
401 | return; |
402 | ||
403 | /* | |
404 | *As for guest kernel when processing subcommand record&report, | |
405 | *we arrange module mmap prior to guest kernel mmap and trigger | |
406 | *a preload dso because default guest module symbols are loaded | |
407 | *from guest kallsyms instead of /lib/modules/XXX/XXX. This | |
408 | *method is used to avoid symbol missing when the first addr is | |
409 | *in module instead of in guest kernel. | |
410 | */ | |
8115d60c ACM |
411 | err = perf_event__synthesize_modules(process_synthesized_event, |
412 | psession, machine); | |
a1645ce1 ZY |
413 | if (err < 0) |
414 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 415 | " relocation symbol.\n", machine->pid); |
a1645ce1 | 416 | |
a1645ce1 ZY |
417 | /* |
418 | * We use _stext for guest kernel because guest kernel's /proc/kallsyms | |
419 | * have no _text sometimes. | |
420 | */ | |
8115d60c ACM |
421 | err = perf_event__synthesize_kernel_mmap(process_synthesized_event, |
422 | psession, machine, "_text"); | |
a1645ce1 | 423 | if (err < 0) |
8115d60c ACM |
424 | err = perf_event__synthesize_kernel_mmap(process_synthesized_event, |
425 | psession, machine, | |
426 | "_stext"); | |
a1645ce1 ZY |
427 | if (err < 0) |
428 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 429 | " relocation symbol.\n", machine->pid); |
a1645ce1 ZY |
430 | } |
431 | ||
98402807 FW |
432 | static struct perf_event_header finished_round_event = { |
433 | .size = sizeof(struct perf_event_header), | |
434 | .type = PERF_RECORD_FINISHED_ROUND, | |
435 | }; | |
436 | ||
437 | static void mmap_read_all(void) | |
438 | { | |
0e2e63dd | 439 | int i; |
98402807 | 440 | |
aece948f | 441 | for (i = 0; i < evsel_list->nr_mmaps; i++) { |
0a27d7f9 ACM |
442 | if (evsel_list->mmap[i].base) |
443 | mmap_read(&evsel_list->mmap[i]); | |
98402807 FW |
444 | } |
445 | ||
446 | if (perf_header__has_feat(&session->header, HEADER_TRACE_INFO)) | |
447 | write_output(&finished_round_event, sizeof(finished_round_event)); | |
448 | } | |
449 | ||
d4db3f16 | 450 | static int __cmd_record(int argc, const char **argv) |
16c8a109 | 451 | { |
abaff32a | 452 | struct stat st; |
abaff32a | 453 | int flags; |
4dc0a04b | 454 | int err; |
8b412664 | 455 | unsigned long waking = 0; |
856e9660 | 456 | int child_ready_pipe[2], go_pipe[2]; |
46be604b | 457 | const bool forks = argc > 0; |
856e9660 | 458 | char buf; |
23346f21 | 459 | struct machine *machine; |
de9ac07b | 460 | |
33e49ea7 AK |
461 | progname = argv[0]; |
462 | ||
de9ac07b | 463 | page_size = sysconf(_SC_PAGE_SIZE); |
de9ac07b | 464 | |
f5970550 PZ |
465 | atexit(sig_atexit); |
466 | signal(SIGCHLD, sig_handler); | |
467 | signal(SIGINT, sig_handler); | |
18483b81 | 468 | signal(SIGUSR1, sig_handler); |
f5970550 | 469 | |
d4db3f16 | 470 | if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) { |
856e9660 PZ |
471 | perror("failed to create pipes"); |
472 | exit(-1); | |
473 | } | |
474 | ||
d7065adb FBH |
475 | if (!output_name) { |
476 | if (!fstat(STDOUT_FILENO, &st) && S_ISFIFO(st.st_mode)) | |
477 | pipe_output = 1; | |
478 | else | |
479 | output_name = "perf.data"; | |
480 | } | |
481 | if (output_name) { | |
482 | if (!strcmp(output_name, "-")) | |
483 | pipe_output = 1; | |
484 | else if (!stat(output_name, &st) && st.st_size) { | |
485 | if (write_mode == WRITE_FORCE) { | |
486 | char oldname[PATH_MAX]; | |
487 | snprintf(oldname, sizeof(oldname), "%s.old", | |
488 | output_name); | |
489 | unlink(oldname); | |
490 | rename(output_name, oldname); | |
491 | } | |
492 | } else if (write_mode == WRITE_APPEND) { | |
493 | write_mode = WRITE_FORCE; | |
266e0e21 | 494 | } |
97124d5e PZ |
495 | } |
496 | ||
f887f301 | 497 | flags = O_CREAT|O_RDWR; |
7865e817 | 498 | if (write_mode == WRITE_APPEND) |
f5970550 | 499 | file_new = 0; |
abaff32a IM |
500 | else |
501 | flags |= O_TRUNC; | |
502 | ||
529870e3 TZ |
503 | if (pipe_output) |
504 | output = STDOUT_FILENO; | |
505 | else | |
506 | output = open(output_name, flags, S_IRUSR | S_IWUSR); | |
de9ac07b PZ |
507 | if (output < 0) { |
508 | perror("failed to create output file"); | |
509 | exit(-1); | |
510 | } | |
511 | ||
7865e817 | 512 | session = perf_session__new(output_name, O_WRONLY, |
21ef97f0 | 513 | write_mode == WRITE_FORCE, false, NULL); |
94c744b6 | 514 | if (session == NULL) { |
a9a70bbc ACM |
515 | pr_err("Not enough memory for reading perf file header\n"); |
516 | return -1; | |
517 | } | |
518 | ||
baa2f6ce ACM |
519 | if (!no_buildid) |
520 | perf_header__set_feat(&session->header, HEADER_BUILD_ID); | |
521 | ||
4dc0a04b | 522 | if (!file_new) { |
a91e5431 | 523 | err = perf_session__read_header(session, output); |
4dc0a04b | 524 | if (err < 0) |
39d17dac | 525 | goto out_delete_session; |
4dc0a04b ACM |
526 | } |
527 | ||
361c99a6 | 528 | if (have_tracepoints(&evsel_list->entries)) |
94c744b6 | 529 | perf_header__set_feat(&session->header, HEADER_TRACE_INFO); |
03456a15 | 530 | |
800cd25c FW |
531 | /* 512 kiB: default amount of unprivileged mlocked memory */ |
532 | if (mmap_pages == UINT_MAX) | |
533 | mmap_pages = (512 * 1024) / page_size; | |
534 | ||
d4db3f16 | 535 | if (forks) { |
46be604b | 536 | child_pid = fork(); |
2fb750e8 | 537 | if (child_pid < 0) { |
856e9660 PZ |
538 | perror("failed to fork"); |
539 | exit(-1); | |
540 | } | |
7c6a1c65 | 541 | |
46be604b | 542 | if (!child_pid) { |
529870e3 TZ |
543 | if (pipe_output) |
544 | dup2(2, 1); | |
856e9660 PZ |
545 | close(child_ready_pipe[0]); |
546 | close(go_pipe[1]); | |
547 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
548 | ||
549 | /* | |
550 | * Do a dummy execvp to get the PLT entry resolved, | |
551 | * so we avoid the resolver overhead on the real | |
552 | * execvp call. | |
553 | */ | |
554 | execvp("", (char **)argv); | |
555 | ||
556 | /* | |
557 | * Tell the parent we're ready to go | |
558 | */ | |
559 | close(child_ready_pipe[1]); | |
560 | ||
561 | /* | |
562 | * Wait until the parent tells us to go. | |
563 | */ | |
564 | if (read(go_pipe[0], &buf, 1) == -1) | |
565 | perror("unable to read pipe"); | |
566 | ||
567 | execvp(argv[0], (char **)argv); | |
568 | ||
569 | perror(argv[0]); | |
18483b81 | 570 | kill(getppid(), SIGUSR1); |
856e9660 | 571 | exit(-1); |
0a5ac846 | 572 | } |
856e9660 | 573 | |
d6d901c2 | 574 | if (!system_wide && target_tid == -1 && target_pid == -1) |
7e2ed097 | 575 | evsel_list->threads->map[0] = child_pid; |
d6d901c2 | 576 | |
856e9660 PZ |
577 | close(child_ready_pipe[1]); |
578 | close(go_pipe[0]); | |
579 | /* | |
580 | * wait for child to settle | |
581 | */ | |
582 | if (read(child_ready_pipe[0], &buf, 1) == -1) { | |
583 | perror("unable to read pipe"); | |
584 | exit(-1); | |
585 | } | |
586 | close(child_ready_pipe[0]); | |
587 | } | |
588 | ||
dd7927f4 | 589 | open_counters(evsel_list); |
de9ac07b | 590 | |
712a4b60 ACM |
591 | /* |
592 | * perf_session__delete(session) will be called at atexit_header() | |
593 | */ | |
594 | atexit(atexit_header); | |
595 | ||
529870e3 TZ |
596 | if (pipe_output) { |
597 | err = perf_header__write_pipe(output); | |
598 | if (err < 0) | |
599 | return err; | |
600 | } else if (file_new) { | |
a91e5431 ACM |
601 | err = perf_session__write_header(session, evsel_list, |
602 | output, false); | |
d5eed904 ACM |
603 | if (err < 0) |
604 | return err; | |
56b03f3c ACM |
605 | } |
606 | ||
6122e4e4 ACM |
607 | post_processing_offset = lseek(output, 0, SEEK_CUR); |
608 | ||
2c46dbb5 | 609 | if (pipe_output) { |
a91e5431 ACM |
610 | err = perf_session__synthesize_attrs(session, |
611 | process_synthesized_event); | |
2c46dbb5 TZ |
612 | if (err < 0) { |
613 | pr_err("Couldn't synthesize attrs.\n"); | |
614 | return err; | |
615 | } | |
cd19a035 | 616 | |
8115d60c ACM |
617 | err = perf_event__synthesize_event_types(process_synthesized_event, |
618 | session); | |
cd19a035 TZ |
619 | if (err < 0) { |
620 | pr_err("Couldn't synthesize event_types.\n"); | |
621 | return err; | |
622 | } | |
9215545e | 623 | |
361c99a6 | 624 | if (have_tracepoints(&evsel_list->entries)) { |
63e0c771 TZ |
625 | /* |
626 | * FIXME err <= 0 here actually means that | |
627 | * there were no tracepoints so its not really | |
628 | * an error, just that we don't need to | |
629 | * synthesize anything. We really have to | |
630 | * return this more properly and also | |
631 | * propagate errors that now are calling die() | |
632 | */ | |
8115d60c ACM |
633 | err = perf_event__synthesize_tracing_data(output, evsel_list, |
634 | process_synthesized_event, | |
635 | session); | |
63e0c771 TZ |
636 | if (err <= 0) { |
637 | pr_err("Couldn't record tracing data.\n"); | |
638 | return err; | |
639 | } | |
2c9faa06 | 640 | advance_output(err); |
63e0c771 | 641 | } |
2c46dbb5 TZ |
642 | } |
643 | ||
23346f21 ACM |
644 | machine = perf_session__find_host_machine(session); |
645 | if (!machine) { | |
a1645ce1 ZY |
646 | pr_err("Couldn't find native kernel information.\n"); |
647 | return -1; | |
648 | } | |
649 | ||
8115d60c ACM |
650 | err = perf_event__synthesize_kernel_mmap(process_synthesized_event, |
651 | session, machine, "_text"); | |
70162138 | 652 | if (err < 0) |
8115d60c ACM |
653 | err = perf_event__synthesize_kernel_mmap(process_synthesized_event, |
654 | session, machine, "_stext"); | |
c1a3a4b9 ACM |
655 | if (err < 0) |
656 | pr_err("Couldn't record kernel reference relocation symbol\n" | |
657 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
658 | "Check /proc/kallsyms permission or run as root.\n"); | |
b7cece76 | 659 | |
8115d60c ACM |
660 | err = perf_event__synthesize_modules(process_synthesized_event, |
661 | session, machine); | |
c1a3a4b9 ACM |
662 | if (err < 0) |
663 | pr_err("Couldn't record kernel module information.\n" | |
664 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
665 | "Check /proc/modules permission or run as root.\n"); | |
666 | ||
a1645ce1 | 667 | if (perf_guest) |
8115d60c ACM |
668 | perf_session__process_machines(session, |
669 | perf_event__synthesize_guest_os); | |
7c6a1c65 | 670 | |
cf103a14 | 671 | if (!system_wide) |
7c940c18 ACM |
672 | perf_event__synthesize_thread_map(evsel_list->threads, |
673 | process_synthesized_event, | |
674 | session); | |
234fbbf5 | 675 | else |
8115d60c ACM |
676 | perf_event__synthesize_threads(process_synthesized_event, |
677 | session); | |
7c6a1c65 | 678 | |
de9ac07b PZ |
679 | if (realtime_prio) { |
680 | struct sched_param param; | |
681 | ||
682 | param.sched_priority = realtime_prio; | |
683 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { | |
6beba7ad | 684 | pr_err("Could not set realtime priority.\n"); |
de9ac07b PZ |
685 | exit(-1); |
686 | } | |
687 | } | |
688 | ||
856e9660 PZ |
689 | /* |
690 | * Let the child rip | |
691 | */ | |
d4db3f16 ACM |
692 | if (forks) |
693 | close(go_pipe[1]); | |
856e9660 | 694 | |
649c48a9 | 695 | for (;;) { |
2debbc83 | 696 | int hits = samples; |
de9ac07b | 697 | |
98402807 | 698 | mmap_read_all(); |
de9ac07b | 699 | |
649c48a9 PZ |
700 | if (hits == samples) { |
701 | if (done) | |
702 | break; | |
5c581041 | 703 | err = poll(evsel_list->pollfd, evsel_list->nr_fds, -1); |
8b412664 PZ |
704 | waking++; |
705 | } | |
706 | ||
4152ab37 ACM |
707 | if (done) |
708 | perf_evlist__disable(evsel_list); | |
de9ac07b PZ |
709 | } |
710 | ||
18483b81 | 711 | if (quiet || signr == SIGUSR1) |
b44308f5 ACM |
712 | return 0; |
713 | ||
8b412664 PZ |
714 | fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); |
715 | ||
021e9f47 IM |
716 | /* |
717 | * Approximate RIP event size: 24 bytes. | |
718 | */ | |
719 | fprintf(stderr, | |
9486aa38 | 720 | "[ perf record: Captured and wrote %.3f MB %s (~%" PRIu64 " samples) ]\n", |
021e9f47 IM |
721 | (double)bytes_written / 1024.0 / 1024.0, |
722 | output_name, | |
723 | bytes_written / 24); | |
addc2785 | 724 | |
de9ac07b | 725 | return 0; |
39d17dac ACM |
726 | |
727 | out_delete_session: | |
728 | perf_session__delete(session); | |
729 | return err; | |
de9ac07b | 730 | } |
0e9b20b8 | 731 | |
0e9b20b8 | 732 | static const char * const record_usage[] = { |
9e096753 MG |
733 | "perf record [<options>] [<command>]", |
734 | "perf record [<options>] -- <command> [<options>]", | |
0e9b20b8 IM |
735 | NULL |
736 | }; | |
737 | ||
7865e817 FW |
738 | static bool force, append_file; |
739 | ||
bca647aa | 740 | const struct option record_options[] = { |
361c99a6 | 741 | OPT_CALLBACK('e', "event", &evsel_list, "event", |
86847b62 | 742 | "event selector. use 'perf list' to list available events", |
f120f9d5 | 743 | parse_events_option), |
361c99a6 | 744 | OPT_CALLBACK(0, "filter", &evsel_list, "filter", |
c171b552 | 745 | "event filter", parse_filter), |
0e9b20b8 | 746 | OPT_INTEGER('p', "pid", &target_pid, |
d6d901c2 ZY |
747 | "record events on existing process id"), |
748 | OPT_INTEGER('t', "tid", &target_tid, | |
749 | "record events on existing thread id"), | |
0e9b20b8 IM |
750 | OPT_INTEGER('r', "realtime", &realtime_prio, |
751 | "collect data with this RT SCHED_FIFO priority"), | |
acac03fa KS |
752 | OPT_BOOLEAN('D', "no-delay", &nodelay, |
753 | "collect data without buffering"), | |
daac07b2 FW |
754 | OPT_BOOLEAN('R', "raw-samples", &raw_samples, |
755 | "collect raw sample records from all opened counters"), | |
0e9b20b8 IM |
756 | OPT_BOOLEAN('a', "all-cpus", &system_wide, |
757 | "system-wide collection from all CPUs"), | |
abaff32a IM |
758 | OPT_BOOLEAN('A', "append", &append_file, |
759 | "append to the output file to do incremental profiling"), | |
c45c6ea2 SE |
760 | OPT_STRING('C', "cpu", &cpu_list, "cpu", |
761 | "list of cpus to monitor"), | |
97124d5e | 762 | OPT_BOOLEAN('f', "force", &force, |
7865e817 | 763 | "overwrite existing data file (deprecated)"), |
3de29cab | 764 | OPT_U64('c', "count", &user_interval, "event period to sample"), |
abaff32a IM |
765 | OPT_STRING('o', "output", &output_name, "file", |
766 | "output file name"), | |
2e6cdf99 SE |
767 | OPT_BOOLEAN('i', "no-inherit", &no_inherit, |
768 | "child tasks do not inherit counters"), | |
1967936d ACM |
769 | OPT_UINTEGER('F', "freq", &user_freq, "profile at this frequency"), |
770 | OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"), | |
43bece79 LM |
771 | OPT_BOOLEAN(0, "group", &group, |
772 | "put the counters into a counter group"), | |
3efa1cc9 IM |
773 | OPT_BOOLEAN('g', "call-graph", &call_graph, |
774 | "do call-graph (stack chain/backtrace) recording"), | |
c0555642 | 775 | OPT_INCR('v', "verbose", &verbose, |
3da297a6 | 776 | "be more verbose (show counter open errors, etc)"), |
b44308f5 | 777 | OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"), |
649c48a9 PZ |
778 | OPT_BOOLEAN('s', "stat", &inherit_stat, |
779 | "per thread counts"), | |
4bba828d AB |
780 | OPT_BOOLEAN('d', "data", &sample_address, |
781 | "Sample addresses"), | |
9c90a61c | 782 | OPT_BOOLEAN('T', "timestamp", &sample_time, "Sample timestamps"), |
649c48a9 PZ |
783 | OPT_BOOLEAN('n', "no-samples", &no_samples, |
784 | "don't sample"), | |
baa2f6ce | 785 | OPT_BOOLEAN('N', "no-buildid-cache", &no_buildid_cache, |
a1ac1d3c | 786 | "do not update the buildid cache"), |
baa2f6ce ACM |
787 | OPT_BOOLEAN('B', "no-buildid", &no_buildid, |
788 | "do not collect buildids in perf.data"), | |
023695d9 SE |
789 | OPT_CALLBACK('G', "cgroup", &evsel_list, "name", |
790 | "monitor event in cgroup name only", | |
791 | parse_cgroups), | |
0e9b20b8 IM |
792 | OPT_END() |
793 | }; | |
794 | ||
f37a291c | 795 | int cmd_record(int argc, const char **argv, const char *prefix __used) |
0e9b20b8 | 796 | { |
69aad6f1 ACM |
797 | int err = -ENOMEM; |
798 | struct perf_evsel *pos; | |
0e9b20b8 | 799 | |
7e2ed097 | 800 | evsel_list = perf_evlist__new(NULL, NULL); |
361c99a6 ACM |
801 | if (evsel_list == NULL) |
802 | return -ENOMEM; | |
803 | ||
bca647aa | 804 | argc = parse_options(argc, argv, record_options, record_usage, |
655000e7 | 805 | PARSE_OPT_STOP_AT_NON_OPTION); |
d6d901c2 | 806 | if (!argc && target_pid == -1 && target_tid == -1 && |
c45c6ea2 | 807 | !system_wide && !cpu_list) |
bca647aa | 808 | usage_with_options(record_usage, record_options); |
0e9b20b8 | 809 | |
7865e817 FW |
810 | if (force && append_file) { |
811 | fprintf(stderr, "Can't overwrite and append at the same time." | |
812 | " You need to choose between -f and -A"); | |
bca647aa | 813 | usage_with_options(record_usage, record_options); |
7865e817 FW |
814 | } else if (append_file) { |
815 | write_mode = WRITE_APPEND; | |
816 | } else { | |
817 | write_mode = WRITE_FORCE; | |
818 | } | |
819 | ||
023695d9 SE |
820 | if (nr_cgroups && !system_wide) { |
821 | fprintf(stderr, "cgroup monitoring only available in" | |
822 | " system-wide mode\n"); | |
823 | usage_with_options(record_usage, record_options); | |
824 | } | |
825 | ||
655000e7 | 826 | symbol__init(); |
baa2f6ce | 827 | |
ec80fde7 | 828 | if (symbol_conf.kptr_restrict) |
646aaea6 ACM |
829 | pr_warning( |
830 | "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n" | |
831 | "check /proc/sys/kernel/kptr_restrict.\n\n" | |
832 | "Samples in kernel functions may not be resolved if a suitable vmlinux\n" | |
833 | "file is not found in the buildid cache or in the vmlinux path.\n\n" | |
834 | "Samples in kernel modules won't be resolved at all.\n\n" | |
835 | "If some relocation was applied (e.g. kexec) symbols may be misresolved\n" | |
836 | "even with a suitable vmlinux or kallsyms file.\n\n"); | |
ec80fde7 | 837 | |
baa2f6ce | 838 | if (no_buildid_cache || no_buildid) |
a1ac1d3c | 839 | disable_buildid_cache(); |
655000e7 | 840 | |
361c99a6 ACM |
841 | if (evsel_list->nr_entries == 0 && |
842 | perf_evlist__add_default(evsel_list) < 0) { | |
69aad6f1 ACM |
843 | pr_err("Not enough memory for event selector list\n"); |
844 | goto out_symbol_exit; | |
bbd36e5e | 845 | } |
0e9b20b8 | 846 | |
5c98d466 | 847 | if (target_pid != -1) |
d6d901c2 | 848 | target_tid = target_pid; |
d6d901c2 | 849 | |
7e2ed097 ACM |
850 | if (perf_evlist__create_maps(evsel_list, target_pid, |
851 | target_tid, cpu_list) < 0) | |
dd7927f4 | 852 | usage_with_options(record_usage, record_options); |
69aad6f1 | 853 | |
361c99a6 | 854 | list_for_each_entry(pos, &evsel_list->entries, node) { |
7e2ed097 ACM |
855 | if (perf_evsel__alloc_fd(pos, evsel_list->cpus->nr, |
856 | evsel_list->threads->nr) < 0) | |
69aad6f1 | 857 | goto out_free_fd; |
ad7f4e3f ACM |
858 | if (perf_header__push_event(pos->attr.config, event_name(pos))) |
859 | goto out_free_fd; | |
d6d901c2 | 860 | } |
5c581041 | 861 | |
7e2ed097 | 862 | if (perf_evlist__alloc_pollfd(evsel_list) < 0) |
39d17dac | 863 | goto out_free_fd; |
d6d901c2 | 864 | |
3de29cab | 865 | if (user_interval != ULLONG_MAX) |
f9212819 FW |
866 | default_interval = user_interval; |
867 | if (user_freq != UINT_MAX) | |
868 | freq = user_freq; | |
869 | ||
7e4ff9e3 MG |
870 | /* |
871 | * User specified count overrides default frequency. | |
872 | */ | |
873 | if (default_interval) | |
874 | freq = 0; | |
875 | else if (freq) { | |
876 | default_interval = freq; | |
877 | } else { | |
878 | fprintf(stderr, "frequency and count are zero, aborting\n"); | |
39d17dac | 879 | err = -EINVAL; |
5c581041 | 880 | goto out_free_fd; |
7e4ff9e3 MG |
881 | } |
882 | ||
39d17dac | 883 | err = __cmd_record(argc, argv); |
39d17dac | 884 | out_free_fd: |
7e2ed097 | 885 | perf_evlist__delete_maps(evsel_list); |
d65a458b ACM |
886 | out_symbol_exit: |
887 | symbol__exit(); | |
39d17dac | 888 | return err; |
0e9b20b8 | 889 | } |