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 | |
69aad6f1 ACM |
33 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
34 | ||
7865e817 FW |
35 | enum write_mode_t { |
36 | WRITE_FORCE, | |
37 | WRITE_APPEND | |
38 | }; | |
39 | ||
3de29cab SE |
40 | static u64 user_interval = ULLONG_MAX; |
41 | static u64 default_interval = 0; | |
a21ca2ca | 42 | |
de9ac07b | 43 | static unsigned int page_size; |
42e59d7d | 44 | static unsigned int mmap_pages = 128; |
f9212819 | 45 | static unsigned int user_freq = UINT_MAX; |
42e59d7d | 46 | static int freq = 1000; |
de9ac07b | 47 | static int output; |
529870e3 | 48 | static int pipe_output = 0; |
d7065adb | 49 | static const char *output_name = NULL; |
42e59d7d | 50 | static int group = 0; |
1967936d | 51 | static int realtime_prio = 0; |
acac03fa | 52 | static bool nodelay = false; |
c0555642 | 53 | static bool raw_samples = false; |
9c90a61c | 54 | static bool sample_id_all_avail = true; |
c0555642 | 55 | static bool system_wide = false; |
42e59d7d | 56 | static pid_t target_pid = -1; |
d6d901c2 | 57 | static pid_t target_tid = -1; |
42e59d7d | 58 | static pid_t child_pid = -1; |
2e6cdf99 | 59 | static bool no_inherit = false; |
7865e817 | 60 | static enum write_mode_t write_mode = WRITE_FORCE; |
c0555642 IM |
61 | static bool call_graph = false; |
62 | static bool inherit_stat = false; | |
63 | static bool no_samples = false; | |
64 | static bool sample_address = false; | |
9c90a61c | 65 | static bool sample_time = false; |
a1ac1d3c | 66 | static bool no_buildid = false; |
baa2f6ce | 67 | static bool no_buildid_cache = false; |
361c99a6 | 68 | static struct perf_evlist *evsel_list; |
42e59d7d IM |
69 | |
70 | static long samples = 0; | |
42e59d7d | 71 | static u64 bytes_written = 0; |
a21ca2ca | 72 | |
42e59d7d | 73 | static int file_new = 1; |
6122e4e4 | 74 | static off_t post_processing_offset; |
7c6a1c65 | 75 | |
94c744b6 | 76 | static struct perf_session *session; |
c45c6ea2 | 77 | static const char *cpu_list; |
f5970550 | 78 | |
9215545e TZ |
79 | static void advance_output(size_t size) |
80 | { | |
81 | bytes_written += size; | |
82 | } | |
83 | ||
f5970550 PZ |
84 | static void write_output(void *buf, size_t size) |
85 | { | |
86 | while (size) { | |
87 | int ret = write(output, buf, size); | |
88 | ||
89 | if (ret < 0) | |
90 | die("failed to write"); | |
91 | ||
92 | size -= ret; | |
93 | buf += ret; | |
94 | ||
95 | bytes_written += ret; | |
96 | } | |
97 | } | |
98 | ||
8115d60c | 99 | static int process_synthesized_event(union perf_event *event, |
8d50e5b4 | 100 | struct perf_sample *sample __used, |
d8f66248 | 101 | struct perf_session *self __used) |
234fbbf5 | 102 | { |
6122e4e4 | 103 | write_output(event, event->header.size); |
234fbbf5 ACM |
104 | return 0; |
105 | } | |
106 | ||
744bd8aa | 107 | static void mmap_read(struct perf_mmap *md) |
de9ac07b | 108 | { |
744bd8aa | 109 | unsigned int head = perf_mmap__read_head(md); |
de9ac07b PZ |
110 | unsigned int old = md->prev; |
111 | unsigned char *data = md->base + page_size; | |
112 | unsigned long size; | |
113 | void *buf; | |
de9ac07b | 114 | |
dc82009a ACM |
115 | if (old == head) |
116 | return; | |
117 | ||
118 | samples++; | |
de9ac07b PZ |
119 | |
120 | size = head - old; | |
121 | ||
122 | if ((old & md->mask) + size != (head & md->mask)) { | |
123 | buf = &data[old & md->mask]; | |
124 | size = md->mask + 1 - (old & md->mask); | |
125 | old += size; | |
021e9f47 | 126 | |
6122e4e4 | 127 | write_output(buf, size); |
de9ac07b PZ |
128 | } |
129 | ||
130 | buf = &data[old & md->mask]; | |
131 | size = head - old; | |
132 | old += size; | |
021e9f47 | 133 | |
6122e4e4 | 134 | write_output(buf, size); |
de9ac07b PZ |
135 | |
136 | md->prev = old; | |
115d2d89 | 137 | perf_mmap__write_tail(md, old); |
de9ac07b PZ |
138 | } |
139 | ||
140 | static volatile int done = 0; | |
f7b7c26e | 141 | static volatile int signr = -1; |
de9ac07b | 142 | |
16c8a109 | 143 | static void sig_handler(int sig) |
de9ac07b | 144 | { |
16c8a109 | 145 | done = 1; |
f7b7c26e PZ |
146 | signr = sig; |
147 | } | |
148 | ||
149 | static void sig_atexit(void) | |
150 | { | |
5ffc8881 | 151 | if (child_pid > 0) |
933da83a CW |
152 | kill(child_pid, SIGTERM); |
153 | ||
18483b81 | 154 | if (signr == -1 || signr == SIGUSR1) |
f7b7c26e PZ |
155 | return; |
156 | ||
157 | signal(signr, SIG_DFL); | |
158 | kill(getpid(), signr); | |
de9ac07b PZ |
159 | } |
160 | ||
dd7927f4 ACM |
161 | static void config_attr(struct perf_evsel *evsel, struct perf_evlist *evlist) |
162 | { | |
163 | struct perf_event_attr *attr = &evsel->attr; | |
164 | int track = !evsel->idx; /* only the first counter needs these */ | |
7c6a1c65 PZ |
165 | |
166 | attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | | |
167 | PERF_FORMAT_TOTAL_TIME_RUNNING | | |
168 | PERF_FORMAT_ID; | |
16c8a109 | 169 | |
3a9f131f | 170 | attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID; |
3efa1cc9 | 171 | |
361c99a6 | 172 | if (evlist->nr_entries > 1) |
8907fd60 EM |
173 | attr->sample_type |= PERF_SAMPLE_ID; |
174 | ||
f9212819 FW |
175 | /* |
176 | * We default some events to a 1 default interval. But keep | |
177 | * it a weak assumption overridable by the user. | |
178 | */ | |
179 | if (!attr->sample_period || (user_freq != UINT_MAX && | |
3de29cab | 180 | user_interval != ULLONG_MAX)) { |
f9212819 FW |
181 | if (freq) { |
182 | attr->sample_type |= PERF_SAMPLE_PERIOD; | |
183 | attr->freq = 1; | |
184 | attr->sample_freq = freq; | |
185 | } else { | |
186 | attr->sample_period = default_interval; | |
187 | } | |
1dba15e7 | 188 | } |
3efa1cc9 | 189 | |
649c48a9 PZ |
190 | if (no_samples) |
191 | attr->sample_freq = 0; | |
192 | ||
193 | if (inherit_stat) | |
194 | attr->inherit_stat = 1; | |
195 | ||
3af9e859 | 196 | if (sample_address) { |
4bba828d | 197 | attr->sample_type |= PERF_SAMPLE_ADDR; |
3af9e859 EM |
198 | attr->mmap_data = track; |
199 | } | |
4bba828d | 200 | |
3efa1cc9 IM |
201 | if (call_graph) |
202 | attr->sample_type |= PERF_SAMPLE_CALLCHAIN; | |
203 | ||
f60f3593 AS |
204 | if (system_wide) |
205 | attr->sample_type |= PERF_SAMPLE_CPU; | |
206 | ||
a43d3f08 ACM |
207 | if (sample_id_all_avail && |
208 | (sample_time || system_wide || !no_inherit || cpu_list)) | |
9c90a61c ACM |
209 | attr->sample_type |= PERF_SAMPLE_TIME; |
210 | ||
cd6feeea | 211 | if (raw_samples) { |
6ddf259d | 212 | attr->sample_type |= PERF_SAMPLE_TIME; |
daac07b2 | 213 | attr->sample_type |= PERF_SAMPLE_RAW; |
cd6feeea IM |
214 | attr->sample_type |= PERF_SAMPLE_CPU; |
215 | } | |
f413cdb8 | 216 | |
acac03fa KS |
217 | if (nodelay) { |
218 | attr->watermark = 0; | |
219 | attr->wakeup_events = 1; | |
220 | } | |
221 | ||
a21ca2ca IM |
222 | attr->mmap = track; |
223 | attr->comm = track; | |
dd7927f4 | 224 | |
2e6cdf99 | 225 | if (target_pid == -1 && target_tid == -1 && !system_wide) { |
46be604b | 226 | attr->disabled = 1; |
bedbfdea | 227 | attr->enable_on_exec = 1; |
46be604b | 228 | } |
dd7927f4 | 229 | } |
bedbfdea | 230 | |
a91e5431 ACM |
231 | static bool perf_evlist__equal(struct perf_evlist *evlist, |
232 | struct perf_evlist *other) | |
233 | { | |
234 | struct perf_evsel *pos, *pair; | |
235 | ||
236 | if (evlist->nr_entries != other->nr_entries) | |
237 | return false; | |
238 | ||
239 | pair = list_entry(other->entries.next, struct perf_evsel, node); | |
240 | ||
241 | list_for_each_entry(pos, &evlist->entries, node) { | |
242 | if (memcmp(&pos->attr, &pair->attr, sizeof(pos->attr) != 0)) | |
243 | return false; | |
244 | pair = list_entry(pair->node.next, struct perf_evsel, node); | |
245 | } | |
246 | ||
247 | return true; | |
248 | } | |
249 | ||
dd7927f4 ACM |
250 | static void open_counters(struct perf_evlist *evlist) |
251 | { | |
252 | struct perf_evsel *pos; | |
dd7927f4 ACM |
253 | |
254 | list_for_each_entry(pos, &evlist->entries, node) { | |
255 | struct perf_event_attr *attr = &pos->attr; | |
256 | /* | |
257 | * Check if parse_single_tracepoint_event has already asked for | |
258 | * PERF_SAMPLE_TIME. | |
259 | * | |
260 | * XXX this is kludgy but short term fix for problems introduced by | |
261 | * eac23d1c that broke 'perf script' by having different sample_types | |
262 | * when using multiple tracepoint events when we use a perf binary | |
263 | * that tries to use sample_id_all on an older kernel. | |
264 | * | |
265 | * We need to move counter creation to perf_session, support | |
266 | * different sample_types, etc. | |
267 | */ | |
268 | bool time_needed = attr->sample_type & PERF_SAMPLE_TIME; | |
d6d901c2 | 269 | |
dd7927f4 ACM |
270 | config_attr(pos, evlist); |
271 | retry_sample_id: | |
272 | attr->sample_id_all = sample_id_all_avail ? 1 : 0; | |
273 | try_again: | |
7e2ed097 ACM |
274 | if (perf_evsel__open(pos, evlist->cpus, evlist->threads, group, |
275 | !no_inherit) < 0) { | |
d6d901c2 ZY |
276 | int err = errno; |
277 | ||
278 | if (err == EPERM || err == EACCES) | |
279 | die("Permission error - are you root?\n" | |
280 | "\t Consider tweaking" | |
281 | " /proc/sys/kernel/perf_event_paranoid.\n"); | |
c45c6ea2 | 282 | else if (err == ENODEV && cpu_list) { |
d6d901c2 ZY |
283 | die("No such device - did you specify" |
284 | " an out-of-range profile CPU?\n"); | |
9c90a61c ACM |
285 | } else if (err == EINVAL && sample_id_all_avail) { |
286 | /* | |
287 | * Old kernel, no attr->sample_id_type_all field | |
288 | */ | |
289 | sample_id_all_avail = false; | |
a43d3f08 | 290 | if (!sample_time && !raw_samples && !time_needed) |
eac23d1c IM |
291 | attr->sample_type &= ~PERF_SAMPLE_TIME; |
292 | ||
9c90a61c | 293 | goto retry_sample_id; |
d6d901c2 | 294 | } |
3da297a6 | 295 | |
d6d901c2 ZY |
296 | /* |
297 | * If it's cycles then fall back to hrtimer | |
298 | * based cpu-clock-tick sw counter, which | |
299 | * is always available even if no PMU support: | |
300 | */ | |
301 | if (attr->type == PERF_TYPE_HARDWARE | |
302 | && attr->config == PERF_COUNT_HW_CPU_CYCLES) { | |
303 | ||
304 | if (verbose) | |
305 | warning(" ... trying to fall back to cpu-clock-ticks\n"); | |
306 | attr->type = PERF_TYPE_SOFTWARE; | |
307 | attr->config = PERF_COUNT_SW_CPU_CLOCK; | |
308 | goto try_again; | |
309 | } | |
310 | printf("\n"); | |
d9cf837e | 311 | error("sys_perf_event_open() syscall returned with %d (%s). /bin/dmesg may provide additional information.\n", |
dd7927f4 | 312 | err, strerror(err)); |
bfd45118 SK |
313 | |
314 | #if defined(__i386__) || defined(__x86_64__) | |
d6d901c2 ZY |
315 | if (attr->type == PERF_TYPE_HARDWARE && err == EOPNOTSUPP) |
316 | die("No hardware sampling interrupt available." | |
317 | " No APIC? If so then you can boot the kernel" | |
318 | " with the \"lapic\" boot parameter to" | |
319 | " force-enable it.\n"); | |
bfd45118 SK |
320 | #endif |
321 | ||
d6d901c2 | 322 | die("No CONFIG_PERF_EVENTS=y kernel support configured?\n"); |
c171b552 LZ |
323 | } |
324 | } | |
a43d3f08 | 325 | |
0a102479 FW |
326 | if (perf_evlist__set_filters(evlist)) { |
327 | error("failed to set filter with %d (%s)\n", errno, | |
328 | strerror(errno)); | |
329 | exit(-1); | |
330 | } | |
331 | ||
7e2ed097 | 332 | if (perf_evlist__mmap(evlist, mmap_pages, false) < 0) |
0a27d7f9 ACM |
333 | die("failed to mmap with %d (%s)\n", errno, strerror(errno)); |
334 | ||
a91e5431 ACM |
335 | if (file_new) |
336 | session->evlist = evlist; | |
337 | else { | |
338 | if (!perf_evlist__equal(session->evlist, evlist)) { | |
339 | fprintf(stderr, "incompatible append\n"); | |
340 | exit(-1); | |
341 | } | |
342 | } | |
343 | ||
344 | perf_session__update_sample_type(session); | |
16c8a109 PZ |
345 | } |
346 | ||
6122e4e4 ACM |
347 | static int process_buildids(void) |
348 | { | |
349 | u64 size = lseek(output, 0, SEEK_CUR); | |
350 | ||
9f591fd7 ACM |
351 | if (size == 0) |
352 | return 0; | |
353 | ||
6122e4e4 ACM |
354 | session->fd = output; |
355 | return __perf_session__process_events(session, post_processing_offset, | |
356 | size - post_processing_offset, | |
357 | size, &build_id__mark_dso_hit_ops); | |
358 | } | |
359 | ||
f5970550 PZ |
360 | static void atexit_header(void) |
361 | { | |
c7929e47 TZ |
362 | if (!pipe_output) { |
363 | session->header.data_size += bytes_written; | |
f5970550 | 364 | |
baa2f6ce ACM |
365 | if (!no_buildid) |
366 | process_buildids(); | |
a91e5431 | 367 | perf_session__write_header(session, evsel_list, output, true); |
39d17dac | 368 | perf_session__delete(session); |
361c99a6 | 369 | perf_evlist__delete(evsel_list); |
d65a458b | 370 | symbol__exit(); |
c7929e47 | 371 | } |
f5970550 PZ |
372 | } |
373 | ||
8115d60c | 374 | static void perf_event__synthesize_guest_os(struct machine *machine, void *data) |
a1645ce1 ZY |
375 | { |
376 | int err; | |
23346f21 | 377 | struct perf_session *psession = data; |
a1645ce1 | 378 | |
23346f21 | 379 | if (machine__is_host(machine)) |
a1645ce1 ZY |
380 | return; |
381 | ||
382 | /* | |
383 | *As for guest kernel when processing subcommand record&report, | |
384 | *we arrange module mmap prior to guest kernel mmap and trigger | |
385 | *a preload dso because default guest module symbols are loaded | |
386 | *from guest kallsyms instead of /lib/modules/XXX/XXX. This | |
387 | *method is used to avoid symbol missing when the first addr is | |
388 | *in module instead of in guest kernel. | |
389 | */ | |
8115d60c ACM |
390 | err = perf_event__synthesize_modules(process_synthesized_event, |
391 | psession, machine); | |
a1645ce1 ZY |
392 | if (err < 0) |
393 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 394 | " relocation symbol.\n", machine->pid); |
a1645ce1 | 395 | |
a1645ce1 ZY |
396 | /* |
397 | * We use _stext for guest kernel because guest kernel's /proc/kallsyms | |
398 | * have no _text sometimes. | |
399 | */ | |
8115d60c ACM |
400 | err = perf_event__synthesize_kernel_mmap(process_synthesized_event, |
401 | psession, machine, "_text"); | |
a1645ce1 | 402 | if (err < 0) |
8115d60c ACM |
403 | err = perf_event__synthesize_kernel_mmap(process_synthesized_event, |
404 | psession, machine, | |
405 | "_stext"); | |
a1645ce1 ZY |
406 | if (err < 0) |
407 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 408 | " relocation symbol.\n", machine->pid); |
a1645ce1 ZY |
409 | } |
410 | ||
98402807 FW |
411 | static struct perf_event_header finished_round_event = { |
412 | .size = sizeof(struct perf_event_header), | |
413 | .type = PERF_RECORD_FINISHED_ROUND, | |
414 | }; | |
415 | ||
416 | static void mmap_read_all(void) | |
417 | { | |
0e2e63dd | 418 | int i; |
98402807 | 419 | |
7e2ed097 | 420 | for (i = 0; i < evsel_list->cpus->nr; i++) { |
0a27d7f9 ACM |
421 | if (evsel_list->mmap[i].base) |
422 | mmap_read(&evsel_list->mmap[i]); | |
98402807 FW |
423 | } |
424 | ||
425 | if (perf_header__has_feat(&session->header, HEADER_TRACE_INFO)) | |
426 | write_output(&finished_round_event, sizeof(finished_round_event)); | |
427 | } | |
428 | ||
d4db3f16 | 429 | static int __cmd_record(int argc, const char **argv) |
16c8a109 | 430 | { |
69aad6f1 | 431 | int i; |
abaff32a | 432 | struct stat st; |
abaff32a | 433 | int flags; |
4dc0a04b | 434 | int err; |
8b412664 | 435 | unsigned long waking = 0; |
856e9660 | 436 | int child_ready_pipe[2], go_pipe[2]; |
46be604b | 437 | const bool forks = argc > 0; |
856e9660 | 438 | char buf; |
23346f21 | 439 | struct machine *machine; |
de9ac07b PZ |
440 | |
441 | page_size = sysconf(_SC_PAGE_SIZE); | |
de9ac07b | 442 | |
f5970550 PZ |
443 | atexit(sig_atexit); |
444 | signal(SIGCHLD, sig_handler); | |
445 | signal(SIGINT, sig_handler); | |
18483b81 | 446 | signal(SIGUSR1, sig_handler); |
f5970550 | 447 | |
d4db3f16 | 448 | if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) { |
856e9660 PZ |
449 | perror("failed to create pipes"); |
450 | exit(-1); | |
451 | } | |
452 | ||
d7065adb FBH |
453 | if (!output_name) { |
454 | if (!fstat(STDOUT_FILENO, &st) && S_ISFIFO(st.st_mode)) | |
455 | pipe_output = 1; | |
456 | else | |
457 | output_name = "perf.data"; | |
458 | } | |
459 | if (output_name) { | |
460 | if (!strcmp(output_name, "-")) | |
461 | pipe_output = 1; | |
462 | else if (!stat(output_name, &st) && st.st_size) { | |
463 | if (write_mode == WRITE_FORCE) { | |
464 | char oldname[PATH_MAX]; | |
465 | snprintf(oldname, sizeof(oldname), "%s.old", | |
466 | output_name); | |
467 | unlink(oldname); | |
468 | rename(output_name, oldname); | |
469 | } | |
470 | } else if (write_mode == WRITE_APPEND) { | |
471 | write_mode = WRITE_FORCE; | |
266e0e21 | 472 | } |
97124d5e PZ |
473 | } |
474 | ||
f887f301 | 475 | flags = O_CREAT|O_RDWR; |
7865e817 | 476 | if (write_mode == WRITE_APPEND) |
f5970550 | 477 | file_new = 0; |
abaff32a IM |
478 | else |
479 | flags |= O_TRUNC; | |
480 | ||
529870e3 TZ |
481 | if (pipe_output) |
482 | output = STDOUT_FILENO; | |
483 | else | |
484 | output = open(output_name, flags, S_IRUSR | S_IWUSR); | |
de9ac07b PZ |
485 | if (output < 0) { |
486 | perror("failed to create output file"); | |
487 | exit(-1); | |
488 | } | |
489 | ||
7865e817 | 490 | session = perf_session__new(output_name, O_WRONLY, |
21ef97f0 | 491 | write_mode == WRITE_FORCE, false, NULL); |
94c744b6 | 492 | if (session == NULL) { |
a9a70bbc ACM |
493 | pr_err("Not enough memory for reading perf file header\n"); |
494 | return -1; | |
495 | } | |
496 | ||
baa2f6ce ACM |
497 | if (!no_buildid) |
498 | perf_header__set_feat(&session->header, HEADER_BUILD_ID); | |
499 | ||
4dc0a04b | 500 | if (!file_new) { |
a91e5431 | 501 | err = perf_session__read_header(session, output); |
4dc0a04b | 502 | if (err < 0) |
39d17dac | 503 | goto out_delete_session; |
4dc0a04b ACM |
504 | } |
505 | ||
361c99a6 | 506 | if (have_tracepoints(&evsel_list->entries)) |
94c744b6 | 507 | perf_header__set_feat(&session->header, HEADER_TRACE_INFO); |
03456a15 | 508 | |
d4db3f16 | 509 | if (forks) { |
46be604b | 510 | child_pid = fork(); |
2fb750e8 | 511 | if (child_pid < 0) { |
856e9660 PZ |
512 | perror("failed to fork"); |
513 | exit(-1); | |
514 | } | |
7c6a1c65 | 515 | |
46be604b | 516 | if (!child_pid) { |
529870e3 TZ |
517 | if (pipe_output) |
518 | dup2(2, 1); | |
856e9660 PZ |
519 | close(child_ready_pipe[0]); |
520 | close(go_pipe[1]); | |
521 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
522 | ||
523 | /* | |
524 | * Do a dummy execvp to get the PLT entry resolved, | |
525 | * so we avoid the resolver overhead on the real | |
526 | * execvp call. | |
527 | */ | |
528 | execvp("", (char **)argv); | |
529 | ||
530 | /* | |
531 | * Tell the parent we're ready to go | |
532 | */ | |
533 | close(child_ready_pipe[1]); | |
534 | ||
535 | /* | |
536 | * Wait until the parent tells us to go. | |
537 | */ | |
538 | if (read(go_pipe[0], &buf, 1) == -1) | |
539 | perror("unable to read pipe"); | |
540 | ||
541 | execvp(argv[0], (char **)argv); | |
542 | ||
543 | perror(argv[0]); | |
18483b81 | 544 | kill(getppid(), SIGUSR1); |
856e9660 | 545 | exit(-1); |
0a5ac846 | 546 | } |
856e9660 | 547 | |
d6d901c2 | 548 | if (!system_wide && target_tid == -1 && target_pid == -1) |
7e2ed097 | 549 | evsel_list->threads->map[0] = child_pid; |
d6d901c2 | 550 | |
856e9660 PZ |
551 | close(child_ready_pipe[1]); |
552 | close(go_pipe[0]); | |
553 | /* | |
554 | * wait for child to settle | |
555 | */ | |
556 | if (read(child_ready_pipe[0], &buf, 1) == -1) { | |
557 | perror("unable to read pipe"); | |
558 | exit(-1); | |
559 | } | |
560 | close(child_ready_pipe[0]); | |
561 | } | |
562 | ||
dd7927f4 | 563 | open_counters(evsel_list); |
de9ac07b | 564 | |
712a4b60 ACM |
565 | /* |
566 | * perf_session__delete(session) will be called at atexit_header() | |
567 | */ | |
568 | atexit(atexit_header); | |
569 | ||
529870e3 TZ |
570 | if (pipe_output) { |
571 | err = perf_header__write_pipe(output); | |
572 | if (err < 0) | |
573 | return err; | |
574 | } else if (file_new) { | |
a91e5431 ACM |
575 | err = perf_session__write_header(session, evsel_list, |
576 | output, false); | |
d5eed904 ACM |
577 | if (err < 0) |
578 | return err; | |
56b03f3c ACM |
579 | } |
580 | ||
6122e4e4 ACM |
581 | post_processing_offset = lseek(output, 0, SEEK_CUR); |
582 | ||
2c46dbb5 | 583 | if (pipe_output) { |
a91e5431 ACM |
584 | err = perf_session__synthesize_attrs(session, |
585 | process_synthesized_event); | |
2c46dbb5 TZ |
586 | if (err < 0) { |
587 | pr_err("Couldn't synthesize attrs.\n"); | |
588 | return err; | |
589 | } | |
cd19a035 | 590 | |
8115d60c ACM |
591 | err = perf_event__synthesize_event_types(process_synthesized_event, |
592 | session); | |
cd19a035 TZ |
593 | if (err < 0) { |
594 | pr_err("Couldn't synthesize event_types.\n"); | |
595 | return err; | |
596 | } | |
9215545e | 597 | |
361c99a6 | 598 | if (have_tracepoints(&evsel_list->entries)) { |
63e0c771 TZ |
599 | /* |
600 | * FIXME err <= 0 here actually means that | |
601 | * there were no tracepoints so its not really | |
602 | * an error, just that we don't need to | |
603 | * synthesize anything. We really have to | |
604 | * return this more properly and also | |
605 | * propagate errors that now are calling die() | |
606 | */ | |
8115d60c ACM |
607 | err = perf_event__synthesize_tracing_data(output, evsel_list, |
608 | process_synthesized_event, | |
609 | session); | |
63e0c771 TZ |
610 | if (err <= 0) { |
611 | pr_err("Couldn't record tracing data.\n"); | |
612 | return err; | |
613 | } | |
2c9faa06 | 614 | advance_output(err); |
63e0c771 | 615 | } |
2c46dbb5 TZ |
616 | } |
617 | ||
23346f21 ACM |
618 | machine = perf_session__find_host_machine(session); |
619 | if (!machine) { | |
a1645ce1 ZY |
620 | pr_err("Couldn't find native kernel information.\n"); |
621 | return -1; | |
622 | } | |
623 | ||
8115d60c ACM |
624 | err = perf_event__synthesize_kernel_mmap(process_synthesized_event, |
625 | session, machine, "_text"); | |
70162138 | 626 | if (err < 0) |
8115d60c ACM |
627 | err = perf_event__synthesize_kernel_mmap(process_synthesized_event, |
628 | session, machine, "_stext"); | |
c1a3a4b9 ACM |
629 | if (err < 0) |
630 | pr_err("Couldn't record kernel reference relocation symbol\n" | |
631 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
632 | "Check /proc/kallsyms permission or run as root.\n"); | |
b7cece76 | 633 | |
8115d60c ACM |
634 | err = perf_event__synthesize_modules(process_synthesized_event, |
635 | session, machine); | |
c1a3a4b9 ACM |
636 | if (err < 0) |
637 | pr_err("Couldn't record kernel module information.\n" | |
638 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
639 | "Check /proc/modules permission or run as root.\n"); | |
640 | ||
a1645ce1 | 641 | if (perf_guest) |
8115d60c ACM |
642 | perf_session__process_machines(session, |
643 | perf_event__synthesize_guest_os); | |
7c6a1c65 | 644 | |
cf103a14 | 645 | if (!system_wide) |
7c940c18 ACM |
646 | perf_event__synthesize_thread_map(evsel_list->threads, |
647 | process_synthesized_event, | |
648 | session); | |
234fbbf5 | 649 | else |
8115d60c ACM |
650 | perf_event__synthesize_threads(process_synthesized_event, |
651 | session); | |
7c6a1c65 | 652 | |
de9ac07b PZ |
653 | if (realtime_prio) { |
654 | struct sched_param param; | |
655 | ||
656 | param.sched_priority = realtime_prio; | |
657 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { | |
6beba7ad | 658 | pr_err("Could not set realtime priority.\n"); |
de9ac07b PZ |
659 | exit(-1); |
660 | } | |
661 | } | |
662 | ||
856e9660 PZ |
663 | /* |
664 | * Let the child rip | |
665 | */ | |
d4db3f16 ACM |
666 | if (forks) |
667 | close(go_pipe[1]); | |
856e9660 | 668 | |
649c48a9 | 669 | for (;;) { |
2debbc83 | 670 | int hits = samples; |
d6d901c2 | 671 | int thread; |
de9ac07b | 672 | |
98402807 | 673 | mmap_read_all(); |
de9ac07b | 674 | |
649c48a9 PZ |
675 | if (hits == samples) { |
676 | if (done) | |
677 | break; | |
5c581041 | 678 | err = poll(evsel_list->pollfd, evsel_list->nr_fds, -1); |
8b412664 PZ |
679 | waking++; |
680 | } | |
681 | ||
682 | if (done) { | |
7e2ed097 | 683 | for (i = 0; i < evsel_list->cpus->nr; i++) { |
69aad6f1 ACM |
684 | struct perf_evsel *pos; |
685 | ||
361c99a6 | 686 | list_for_each_entry(pos, &evsel_list->entries, node) { |
d6d901c2 | 687 | for (thread = 0; |
7e2ed097 | 688 | thread < evsel_list->threads->nr; |
d6d901c2 | 689 | thread++) |
69aad6f1 | 690 | ioctl(FD(pos, i, thread), |
d6d901c2 ZY |
691 | PERF_EVENT_IOC_DISABLE); |
692 | } | |
8b412664 | 693 | } |
649c48a9 | 694 | } |
de9ac07b PZ |
695 | } |
696 | ||
18483b81 | 697 | if (quiet || signr == SIGUSR1) |
b44308f5 ACM |
698 | return 0; |
699 | ||
8b412664 PZ |
700 | fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); |
701 | ||
021e9f47 IM |
702 | /* |
703 | * Approximate RIP event size: 24 bytes. | |
704 | */ | |
705 | fprintf(stderr, | |
9486aa38 | 706 | "[ perf record: Captured and wrote %.3f MB %s (~%" PRIu64 " samples) ]\n", |
021e9f47 IM |
707 | (double)bytes_written / 1024.0 / 1024.0, |
708 | output_name, | |
709 | bytes_written / 24); | |
addc2785 | 710 | |
de9ac07b | 711 | return 0; |
39d17dac ACM |
712 | |
713 | out_delete_session: | |
714 | perf_session__delete(session); | |
715 | return err; | |
de9ac07b | 716 | } |
0e9b20b8 | 717 | |
0e9b20b8 | 718 | static const char * const record_usage[] = { |
9e096753 MG |
719 | "perf record [<options>] [<command>]", |
720 | "perf record [<options>] -- <command> [<options>]", | |
0e9b20b8 IM |
721 | NULL |
722 | }; | |
723 | ||
7865e817 FW |
724 | static bool force, append_file; |
725 | ||
bca647aa | 726 | const struct option record_options[] = { |
361c99a6 | 727 | OPT_CALLBACK('e', "event", &evsel_list, "event", |
86847b62 TG |
728 | "event selector. use 'perf list' to list available events", |
729 | parse_events), | |
361c99a6 | 730 | OPT_CALLBACK(0, "filter", &evsel_list, "filter", |
c171b552 | 731 | "event filter", parse_filter), |
0e9b20b8 | 732 | OPT_INTEGER('p', "pid", &target_pid, |
d6d901c2 ZY |
733 | "record events on existing process id"), |
734 | OPT_INTEGER('t', "tid", &target_tid, | |
735 | "record events on existing thread id"), | |
0e9b20b8 IM |
736 | OPT_INTEGER('r', "realtime", &realtime_prio, |
737 | "collect data with this RT SCHED_FIFO priority"), | |
acac03fa KS |
738 | OPT_BOOLEAN('D', "no-delay", &nodelay, |
739 | "collect data without buffering"), | |
daac07b2 FW |
740 | OPT_BOOLEAN('R', "raw-samples", &raw_samples, |
741 | "collect raw sample records from all opened counters"), | |
0e9b20b8 IM |
742 | OPT_BOOLEAN('a', "all-cpus", &system_wide, |
743 | "system-wide collection from all CPUs"), | |
abaff32a IM |
744 | OPT_BOOLEAN('A', "append", &append_file, |
745 | "append to the output file to do incremental profiling"), | |
c45c6ea2 SE |
746 | OPT_STRING('C', "cpu", &cpu_list, "cpu", |
747 | "list of cpus to monitor"), | |
97124d5e | 748 | OPT_BOOLEAN('f', "force", &force, |
7865e817 | 749 | "overwrite existing data file (deprecated)"), |
3de29cab | 750 | OPT_U64('c', "count", &user_interval, "event period to sample"), |
abaff32a IM |
751 | OPT_STRING('o', "output", &output_name, "file", |
752 | "output file name"), | |
2e6cdf99 SE |
753 | OPT_BOOLEAN('i', "no-inherit", &no_inherit, |
754 | "child tasks do not inherit counters"), | |
1967936d ACM |
755 | OPT_UINTEGER('F', "freq", &user_freq, "profile at this frequency"), |
756 | OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"), | |
3efa1cc9 IM |
757 | OPT_BOOLEAN('g', "call-graph", &call_graph, |
758 | "do call-graph (stack chain/backtrace) recording"), | |
c0555642 | 759 | OPT_INCR('v', "verbose", &verbose, |
3da297a6 | 760 | "be more verbose (show counter open errors, etc)"), |
b44308f5 | 761 | OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"), |
649c48a9 PZ |
762 | OPT_BOOLEAN('s', "stat", &inherit_stat, |
763 | "per thread counts"), | |
4bba828d AB |
764 | OPT_BOOLEAN('d', "data", &sample_address, |
765 | "Sample addresses"), | |
9c90a61c | 766 | OPT_BOOLEAN('T', "timestamp", &sample_time, "Sample timestamps"), |
649c48a9 PZ |
767 | OPT_BOOLEAN('n', "no-samples", &no_samples, |
768 | "don't sample"), | |
baa2f6ce | 769 | OPT_BOOLEAN('N', "no-buildid-cache", &no_buildid_cache, |
a1ac1d3c | 770 | "do not update the buildid cache"), |
baa2f6ce ACM |
771 | OPT_BOOLEAN('B', "no-buildid", &no_buildid, |
772 | "do not collect buildids in perf.data"), | |
023695d9 SE |
773 | OPT_CALLBACK('G', "cgroup", &evsel_list, "name", |
774 | "monitor event in cgroup name only", | |
775 | parse_cgroups), | |
0e9b20b8 IM |
776 | OPT_END() |
777 | }; | |
778 | ||
f37a291c | 779 | int cmd_record(int argc, const char **argv, const char *prefix __used) |
0e9b20b8 | 780 | { |
69aad6f1 ACM |
781 | int err = -ENOMEM; |
782 | struct perf_evsel *pos; | |
0e9b20b8 | 783 | |
7e2ed097 | 784 | evsel_list = perf_evlist__new(NULL, NULL); |
361c99a6 ACM |
785 | if (evsel_list == NULL) |
786 | return -ENOMEM; | |
787 | ||
bca647aa | 788 | argc = parse_options(argc, argv, record_options, record_usage, |
655000e7 | 789 | PARSE_OPT_STOP_AT_NON_OPTION); |
d6d901c2 | 790 | if (!argc && target_pid == -1 && target_tid == -1 && |
c45c6ea2 | 791 | !system_wide && !cpu_list) |
bca647aa | 792 | usage_with_options(record_usage, record_options); |
0e9b20b8 | 793 | |
7865e817 FW |
794 | if (force && append_file) { |
795 | fprintf(stderr, "Can't overwrite and append at the same time." | |
796 | " You need to choose between -f and -A"); | |
bca647aa | 797 | usage_with_options(record_usage, record_options); |
7865e817 FW |
798 | } else if (append_file) { |
799 | write_mode = WRITE_APPEND; | |
800 | } else { | |
801 | write_mode = WRITE_FORCE; | |
802 | } | |
803 | ||
023695d9 SE |
804 | if (nr_cgroups && !system_wide) { |
805 | fprintf(stderr, "cgroup monitoring only available in" | |
806 | " system-wide mode\n"); | |
807 | usage_with_options(record_usage, record_options); | |
808 | } | |
809 | ||
655000e7 | 810 | symbol__init(); |
baa2f6ce ACM |
811 | |
812 | if (no_buildid_cache || no_buildid) | |
a1ac1d3c | 813 | disable_buildid_cache(); |
655000e7 | 814 | |
361c99a6 ACM |
815 | if (evsel_list->nr_entries == 0 && |
816 | perf_evlist__add_default(evsel_list) < 0) { | |
69aad6f1 ACM |
817 | pr_err("Not enough memory for event selector list\n"); |
818 | goto out_symbol_exit; | |
bbd36e5e | 819 | } |
0e9b20b8 | 820 | |
5c98d466 | 821 | if (target_pid != -1) |
d6d901c2 | 822 | target_tid = target_pid; |
d6d901c2 | 823 | |
7e2ed097 ACM |
824 | if (perf_evlist__create_maps(evsel_list, target_pid, |
825 | target_tid, cpu_list) < 0) | |
dd7927f4 | 826 | usage_with_options(record_usage, record_options); |
69aad6f1 | 827 | |
361c99a6 | 828 | list_for_each_entry(pos, &evsel_list->entries, node) { |
7e2ed097 ACM |
829 | if (perf_evsel__alloc_fd(pos, evsel_list->cpus->nr, |
830 | evsel_list->threads->nr) < 0) | |
69aad6f1 | 831 | goto out_free_fd; |
ad7f4e3f ACM |
832 | if (perf_header__push_event(pos->attr.config, event_name(pos))) |
833 | goto out_free_fd; | |
d6d901c2 | 834 | } |
5c581041 | 835 | |
7e2ed097 | 836 | if (perf_evlist__alloc_pollfd(evsel_list) < 0) |
39d17dac | 837 | goto out_free_fd; |
d6d901c2 | 838 | |
3de29cab | 839 | if (user_interval != ULLONG_MAX) |
f9212819 FW |
840 | default_interval = user_interval; |
841 | if (user_freq != UINT_MAX) | |
842 | freq = user_freq; | |
843 | ||
7e4ff9e3 MG |
844 | /* |
845 | * User specified count overrides default frequency. | |
846 | */ | |
847 | if (default_interval) | |
848 | freq = 0; | |
849 | else if (freq) { | |
850 | default_interval = freq; | |
851 | } else { | |
852 | fprintf(stderr, "frequency and count are zero, aborting\n"); | |
39d17dac | 853 | err = -EINVAL; |
5c581041 | 854 | goto out_free_fd; |
7e4ff9e3 MG |
855 | } |
856 | ||
39d17dac | 857 | err = __cmd_record(argc, argv); |
39d17dac | 858 | out_free_fd: |
7e2ed097 | 859 | perf_evlist__delete_maps(evsel_list); |
d65a458b ACM |
860 | out_symbol_exit: |
861 | symbol__exit(); | |
39d17dac | 862 | return err; |
0e9b20b8 | 863 | } |