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" |
7c6a1c65 | 27 | |
97124d5e | 28 | #include <unistd.h> |
de9ac07b | 29 | #include <sched.h> |
a41794cd | 30 | #include <sys/mman.h> |
de9ac07b | 31 | |
69aad6f1 ACM |
32 | #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y)) |
33 | ||
7865e817 FW |
34 | enum write_mode_t { |
35 | WRITE_FORCE, | |
36 | WRITE_APPEND | |
37 | }; | |
38 | ||
3de29cab SE |
39 | static u64 user_interval = ULLONG_MAX; |
40 | static u64 default_interval = 0; | |
640c03ce | 41 | static u64 sample_type; |
a21ca2ca | 42 | |
60d567e2 | 43 | static struct cpu_map *cpus; |
de9ac07b | 44 | static unsigned int page_size; |
42e59d7d | 45 | static unsigned int mmap_pages = 128; |
f9212819 | 46 | static unsigned int user_freq = UINT_MAX; |
42e59d7d | 47 | static int freq = 1000; |
de9ac07b | 48 | static int output; |
529870e3 | 49 | static int pipe_output = 0; |
23ac9cbe | 50 | static const char *output_name = "perf.data"; |
42e59d7d | 51 | static int group = 0; |
1967936d | 52 | static int realtime_prio = 0; |
acac03fa | 53 | static bool nodelay = false; |
c0555642 | 54 | static bool raw_samples = false; |
9c90a61c | 55 | static bool sample_id_all_avail = true; |
c0555642 | 56 | static bool system_wide = false; |
42e59d7d | 57 | static pid_t target_pid = -1; |
d6d901c2 | 58 | static pid_t target_tid = -1; |
5c98d466 | 59 | static struct thread_map *threads; |
42e59d7d | 60 | static pid_t child_pid = -1; |
2e6cdf99 | 61 | static bool no_inherit = false; |
7865e817 | 62 | static enum write_mode_t write_mode = WRITE_FORCE; |
c0555642 IM |
63 | static bool call_graph = false; |
64 | static bool inherit_stat = false; | |
65 | static bool no_samples = false; | |
66 | static bool sample_address = false; | |
9c90a61c | 67 | static bool sample_time = false; |
a1ac1d3c | 68 | static bool no_buildid = false; |
baa2f6ce | 69 | static bool no_buildid_cache = false; |
361c99a6 | 70 | static struct perf_evlist *evsel_list; |
42e59d7d IM |
71 | |
72 | static long samples = 0; | |
42e59d7d | 73 | static u64 bytes_written = 0; |
a21ca2ca | 74 | |
42e59d7d | 75 | static int file_new = 1; |
6122e4e4 | 76 | static off_t post_processing_offset; |
7c6a1c65 | 77 | |
94c744b6 | 78 | static struct perf_session *session; |
c45c6ea2 | 79 | static const char *cpu_list; |
f5970550 | 80 | |
de9ac07b | 81 | struct mmap_data { |
a21ca2ca IM |
82 | void *base; |
83 | unsigned int mask; | |
84 | unsigned int prev; | |
de9ac07b PZ |
85 | }; |
86 | ||
0e2e63dd | 87 | static struct mmap_data mmap_array[MAX_NR_CPUS]; |
a21ca2ca | 88 | |
9d91a6f7 | 89 | static unsigned long mmap_read_head(struct mmap_data *md) |
de9ac07b | 90 | { |
cdd6c482 | 91 | struct perf_event_mmap_page *pc = md->base; |
9d91a6f7 | 92 | long head; |
de9ac07b PZ |
93 | |
94 | head = pc->data_head; | |
95 | rmb(); | |
96 | ||
97 | return head; | |
98 | } | |
99 | ||
9d91a6f7 PZ |
100 | static void mmap_write_tail(struct mmap_data *md, unsigned long tail) |
101 | { | |
cdd6c482 | 102 | struct perf_event_mmap_page *pc = md->base; |
9d91a6f7 PZ |
103 | |
104 | /* | |
105 | * ensure all reads are done before we write the tail out. | |
106 | */ | |
107 | /* mb(); */ | |
108 | pc->data_tail = tail; | |
109 | } | |
110 | ||
9215545e TZ |
111 | static void advance_output(size_t size) |
112 | { | |
113 | bytes_written += size; | |
114 | } | |
115 | ||
f5970550 PZ |
116 | static void write_output(void *buf, size_t size) |
117 | { | |
118 | while (size) { | |
119 | int ret = write(output, buf, size); | |
120 | ||
121 | if (ret < 0) | |
122 | die("failed to write"); | |
123 | ||
124 | size -= ret; | |
125 | buf += ret; | |
126 | ||
127 | bytes_written += ret; | |
128 | } | |
129 | } | |
130 | ||
d8f66248 | 131 | static int process_synthesized_event(event_t *event, |
640c03ce | 132 | struct sample_data *sample __used, |
d8f66248 | 133 | struct perf_session *self __used) |
234fbbf5 | 134 | { |
6122e4e4 | 135 | write_output(event, event->header.size); |
234fbbf5 ACM |
136 | return 0; |
137 | } | |
138 | ||
de9ac07b PZ |
139 | static void mmap_read(struct mmap_data *md) |
140 | { | |
141 | unsigned int head = mmap_read_head(md); | |
142 | unsigned int old = md->prev; | |
143 | unsigned char *data = md->base + page_size; | |
144 | unsigned long size; | |
145 | void *buf; | |
146 | int diff; | |
147 | ||
de9ac07b PZ |
148 | /* |
149 | * If we're further behind than half the buffer, there's a chance | |
2debbc83 | 150 | * the writer will bite our tail and mess up the samples under us. |
de9ac07b PZ |
151 | * |
152 | * If we somehow ended up ahead of the head, we got messed up. | |
153 | * | |
154 | * In either case, truncate and restart at head. | |
155 | */ | |
156 | diff = head - old; | |
9d91a6f7 | 157 | if (diff < 0) { |
ef365cef | 158 | fprintf(stderr, "WARNING: failed to keep up with mmap data\n"); |
de9ac07b PZ |
159 | /* |
160 | * head points to a known good entry, start there. | |
161 | */ | |
162 | old = head; | |
163 | } | |
164 | ||
de9ac07b | 165 | if (old != head) |
2debbc83 | 166 | samples++; |
de9ac07b PZ |
167 | |
168 | size = head - old; | |
169 | ||
170 | if ((old & md->mask) + size != (head & md->mask)) { | |
171 | buf = &data[old & md->mask]; | |
172 | size = md->mask + 1 - (old & md->mask); | |
173 | old += size; | |
021e9f47 | 174 | |
6122e4e4 | 175 | write_output(buf, size); |
de9ac07b PZ |
176 | } |
177 | ||
178 | buf = &data[old & md->mask]; | |
179 | size = head - old; | |
180 | old += size; | |
021e9f47 | 181 | |
6122e4e4 | 182 | write_output(buf, size); |
de9ac07b PZ |
183 | |
184 | md->prev = old; | |
9d91a6f7 | 185 | mmap_write_tail(md, old); |
de9ac07b PZ |
186 | } |
187 | ||
188 | static volatile int done = 0; | |
f7b7c26e | 189 | static volatile int signr = -1; |
de9ac07b | 190 | |
16c8a109 | 191 | static void sig_handler(int sig) |
de9ac07b | 192 | { |
16c8a109 | 193 | done = 1; |
f7b7c26e PZ |
194 | signr = sig; |
195 | } | |
196 | ||
197 | static void sig_atexit(void) | |
198 | { | |
5ffc8881 | 199 | if (child_pid > 0) |
933da83a CW |
200 | kill(child_pid, SIGTERM); |
201 | ||
18483b81 | 202 | if (signr == -1 || signr == SIGUSR1) |
f7b7c26e PZ |
203 | return; |
204 | ||
205 | signal(signr, SIG_DFL); | |
206 | kill(getpid(), signr); | |
de9ac07b PZ |
207 | } |
208 | ||
cdd6c482 | 209 | static struct perf_header_attr *get_header_attr(struct perf_event_attr *a, int nr) |
7c6a1c65 PZ |
210 | { |
211 | struct perf_header_attr *h_attr; | |
212 | ||
94c744b6 ACM |
213 | if (nr < session->header.attrs) { |
214 | h_attr = session->header.attr[nr]; | |
7c6a1c65 PZ |
215 | } else { |
216 | h_attr = perf_header_attr__new(a); | |
dc79c0fc | 217 | if (h_attr != NULL) |
94c744b6 | 218 | if (perf_header__add_attr(&session->header, h_attr) < 0) { |
11deb1f9 ACM |
219 | perf_header_attr__delete(h_attr); |
220 | h_attr = NULL; | |
221 | } | |
7c6a1c65 PZ |
222 | } |
223 | ||
224 | return h_attr; | |
225 | } | |
226 | ||
361c99a6 ACM |
227 | static void create_counter(struct perf_evlist *evlist, |
228 | struct perf_evsel *evsel, int cpu) | |
de9ac07b | 229 | { |
69aad6f1 ACM |
230 | char *filter = evsel->filter; |
231 | struct perf_event_attr *attr = &evsel->attr; | |
7c6a1c65 | 232 | struct perf_header_attr *h_attr; |
d6d901c2 | 233 | int thread_index; |
c171b552 | 234 | int ret; |
7c6a1c65 PZ |
235 | struct { |
236 | u64 count; | |
237 | u64 time_enabled; | |
238 | u64 time_running; | |
239 | u64 id; | |
240 | } read_data; | |
dd7927f4 ACM |
241 | |
242 | for (thread_index = 0; thread_index < threads->nr; thread_index++) { | |
243 | h_attr = get_header_attr(attr, evsel->idx); | |
244 | if (h_attr == NULL) | |
245 | die("nomem\n"); | |
246 | ||
247 | if (!file_new) { | |
248 | if (memcmp(&h_attr->attr, attr, sizeof(*attr))) { | |
249 | fprintf(stderr, "incompatible append\n"); | |
250 | exit(-1); | |
251 | } | |
252 | } | |
253 | ||
254 | if (read(FD(evsel, cpu, thread_index), &read_data, sizeof(read_data)) == -1) { | |
255 | perror("Unable to read perf file descriptor"); | |
256 | exit(-1); | |
257 | } | |
258 | ||
259 | if (perf_header_attr__add_id(h_attr, read_data.id) < 0) { | |
260 | pr_warning("Not enough memory to add id\n"); | |
261 | exit(-1); | |
262 | } | |
263 | ||
264 | assert(FD(evsel, cpu, thread_index) >= 0); | |
265 | fcntl(FD(evsel, cpu, thread_index), F_SETFL, O_NONBLOCK); | |
266 | ||
267 | if (evsel->idx || thread_index) { | |
268 | struct perf_evsel *first; | |
269 | first = list_entry(evlist->entries.next, struct perf_evsel, node); | |
270 | ret = ioctl(FD(evsel, cpu, thread_index), | |
271 | PERF_EVENT_IOC_SET_OUTPUT, | |
272 | FD(first, cpu, 0)); | |
273 | if (ret) { | |
274 | error("failed to set output: %d (%s)\n", errno, | |
275 | strerror(errno)); | |
276 | exit(-1); | |
277 | } | |
278 | } else { | |
279 | mmap_array[cpu].prev = 0; | |
280 | mmap_array[cpu].mask = mmap_pages*page_size - 1; | |
281 | mmap_array[cpu].base = mmap(NULL, (mmap_pages+1)*page_size, | |
282 | PROT_READ | PROT_WRITE, MAP_SHARED, FD(evsel, cpu, thread_index), 0); | |
283 | if (mmap_array[cpu].base == MAP_FAILED) { | |
284 | error("failed to mmap with %d (%s)\n", errno, strerror(errno)); | |
285 | exit(-1); | |
286 | } | |
287 | ||
288 | evlist->pollfd[evlist->nr_fds].fd = FD(evsel, cpu, thread_index); | |
289 | evlist->pollfd[evlist->nr_fds].events = POLLIN; | |
290 | evlist->nr_fds++; | |
291 | } | |
292 | ||
293 | if (filter != NULL) { | |
294 | ret = ioctl(FD(evsel, cpu, thread_index), | |
295 | PERF_EVENT_IOC_SET_FILTER, filter); | |
296 | if (ret) { | |
297 | error("failed to set filter with %d (%s)\n", errno, | |
298 | strerror(errno)); | |
299 | exit(-1); | |
300 | } | |
301 | } | |
302 | } | |
303 | ||
304 | if (!sample_type) | |
305 | sample_type = attr->sample_type; | |
306 | } | |
307 | ||
308 | static void config_attr(struct perf_evsel *evsel, struct perf_evlist *evlist) | |
309 | { | |
310 | struct perf_event_attr *attr = &evsel->attr; | |
311 | int track = !evsel->idx; /* only the first counter needs these */ | |
7c6a1c65 PZ |
312 | |
313 | attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | | |
314 | PERF_FORMAT_TOTAL_TIME_RUNNING | | |
315 | PERF_FORMAT_ID; | |
16c8a109 | 316 | |
3a9f131f | 317 | attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID; |
3efa1cc9 | 318 | |
361c99a6 | 319 | if (evlist->nr_entries > 1) |
8907fd60 EM |
320 | attr->sample_type |= PERF_SAMPLE_ID; |
321 | ||
f9212819 FW |
322 | /* |
323 | * We default some events to a 1 default interval. But keep | |
324 | * it a weak assumption overridable by the user. | |
325 | */ | |
326 | if (!attr->sample_period || (user_freq != UINT_MAX && | |
3de29cab | 327 | user_interval != ULLONG_MAX)) { |
f9212819 FW |
328 | if (freq) { |
329 | attr->sample_type |= PERF_SAMPLE_PERIOD; | |
330 | attr->freq = 1; | |
331 | attr->sample_freq = freq; | |
332 | } else { | |
333 | attr->sample_period = default_interval; | |
334 | } | |
1dba15e7 | 335 | } |
3efa1cc9 | 336 | |
649c48a9 PZ |
337 | if (no_samples) |
338 | attr->sample_freq = 0; | |
339 | ||
340 | if (inherit_stat) | |
341 | attr->inherit_stat = 1; | |
342 | ||
3af9e859 | 343 | if (sample_address) { |
4bba828d | 344 | attr->sample_type |= PERF_SAMPLE_ADDR; |
3af9e859 EM |
345 | attr->mmap_data = track; |
346 | } | |
4bba828d | 347 | |
3efa1cc9 IM |
348 | if (call_graph) |
349 | attr->sample_type |= PERF_SAMPLE_CALLCHAIN; | |
350 | ||
f60f3593 AS |
351 | if (system_wide) |
352 | attr->sample_type |= PERF_SAMPLE_CPU; | |
353 | ||
a43d3f08 ACM |
354 | if (sample_id_all_avail && |
355 | (sample_time || system_wide || !no_inherit || cpu_list)) | |
9c90a61c ACM |
356 | attr->sample_type |= PERF_SAMPLE_TIME; |
357 | ||
cd6feeea | 358 | if (raw_samples) { |
6ddf259d | 359 | attr->sample_type |= PERF_SAMPLE_TIME; |
daac07b2 | 360 | attr->sample_type |= PERF_SAMPLE_RAW; |
cd6feeea IM |
361 | attr->sample_type |= PERF_SAMPLE_CPU; |
362 | } | |
f413cdb8 | 363 | |
acac03fa KS |
364 | if (nodelay) { |
365 | attr->watermark = 0; | |
366 | attr->wakeup_events = 1; | |
367 | } | |
368 | ||
a21ca2ca IM |
369 | attr->mmap = track; |
370 | attr->comm = track; | |
dd7927f4 | 371 | |
2e6cdf99 | 372 | if (target_pid == -1 && target_tid == -1 && !system_wide) { |
46be604b | 373 | attr->disabled = 1; |
bedbfdea | 374 | attr->enable_on_exec = 1; |
46be604b | 375 | } |
dd7927f4 | 376 | } |
bedbfdea | 377 | |
dd7927f4 ACM |
378 | static void open_counters(struct perf_evlist *evlist) |
379 | { | |
380 | struct perf_evsel *pos; | |
381 | int cpu; | |
382 | ||
383 | list_for_each_entry(pos, &evlist->entries, node) { | |
384 | struct perf_event_attr *attr = &pos->attr; | |
385 | /* | |
386 | * Check if parse_single_tracepoint_event has already asked for | |
387 | * PERF_SAMPLE_TIME. | |
388 | * | |
389 | * XXX this is kludgy but short term fix for problems introduced by | |
390 | * eac23d1c that broke 'perf script' by having different sample_types | |
391 | * when using multiple tracepoint events when we use a perf binary | |
392 | * that tries to use sample_id_all on an older kernel. | |
393 | * | |
394 | * We need to move counter creation to perf_session, support | |
395 | * different sample_types, etc. | |
396 | */ | |
397 | bool time_needed = attr->sample_type & PERF_SAMPLE_TIME; | |
d6d901c2 | 398 | |
dd7927f4 ACM |
399 | config_attr(pos, evlist); |
400 | retry_sample_id: | |
401 | attr->sample_id_all = sample_id_all_avail ? 1 : 0; | |
402 | try_again: | |
403 | if (perf_evsel__open(pos, cpus, threads, group, !no_inherit) < 0) { | |
d6d901c2 ZY |
404 | int err = errno; |
405 | ||
406 | if (err == EPERM || err == EACCES) | |
407 | die("Permission error - are you root?\n" | |
408 | "\t Consider tweaking" | |
409 | " /proc/sys/kernel/perf_event_paranoid.\n"); | |
c45c6ea2 | 410 | else if (err == ENODEV && cpu_list) { |
d6d901c2 ZY |
411 | die("No such device - did you specify" |
412 | " an out-of-range profile CPU?\n"); | |
9c90a61c ACM |
413 | } else if (err == EINVAL && sample_id_all_avail) { |
414 | /* | |
415 | * Old kernel, no attr->sample_id_type_all field | |
416 | */ | |
417 | sample_id_all_avail = false; | |
a43d3f08 | 418 | if (!sample_time && !raw_samples && !time_needed) |
eac23d1c IM |
419 | attr->sample_type &= ~PERF_SAMPLE_TIME; |
420 | ||
9c90a61c | 421 | goto retry_sample_id; |
d6d901c2 | 422 | } |
3da297a6 | 423 | |
d6d901c2 ZY |
424 | /* |
425 | * If it's cycles then fall back to hrtimer | |
426 | * based cpu-clock-tick sw counter, which | |
427 | * is always available even if no PMU support: | |
428 | */ | |
429 | if (attr->type == PERF_TYPE_HARDWARE | |
430 | && attr->config == PERF_COUNT_HW_CPU_CYCLES) { | |
431 | ||
432 | if (verbose) | |
433 | warning(" ... trying to fall back to cpu-clock-ticks\n"); | |
434 | attr->type = PERF_TYPE_SOFTWARE; | |
435 | attr->config = PERF_COUNT_SW_CPU_CLOCK; | |
436 | goto try_again; | |
437 | } | |
438 | printf("\n"); | |
d9cf837e | 439 | error("sys_perf_event_open() syscall returned with %d (%s). /bin/dmesg may provide additional information.\n", |
dd7927f4 | 440 | err, strerror(err)); |
bfd45118 SK |
441 | |
442 | #if defined(__i386__) || defined(__x86_64__) | |
d6d901c2 ZY |
443 | if (attr->type == PERF_TYPE_HARDWARE && err == EOPNOTSUPP) |
444 | die("No hardware sampling interrupt available." | |
445 | " No APIC? If so then you can boot the kernel" | |
446 | " with the \"lapic\" boot parameter to" | |
447 | " force-enable it.\n"); | |
bfd45118 SK |
448 | #endif |
449 | ||
d6d901c2 | 450 | die("No CONFIG_PERF_EVENTS=y kernel support configured?\n"); |
c171b552 LZ |
451 | } |
452 | } | |
a43d3f08 | 453 | |
dd7927f4 ACM |
454 | for (cpu = 0; cpu < cpus->nr; ++cpu) { |
455 | list_for_each_entry(pos, &evlist->entries, node) | |
456 | create_counter(evlist, pos, cpu); | |
457 | } | |
16c8a109 PZ |
458 | } |
459 | ||
6122e4e4 ACM |
460 | static int process_buildids(void) |
461 | { | |
462 | u64 size = lseek(output, 0, SEEK_CUR); | |
463 | ||
9f591fd7 ACM |
464 | if (size == 0) |
465 | return 0; | |
466 | ||
6122e4e4 ACM |
467 | session->fd = output; |
468 | return __perf_session__process_events(session, post_processing_offset, | |
469 | size - post_processing_offset, | |
470 | size, &build_id__mark_dso_hit_ops); | |
471 | } | |
472 | ||
f5970550 PZ |
473 | static void atexit_header(void) |
474 | { | |
c7929e47 TZ |
475 | if (!pipe_output) { |
476 | session->header.data_size += bytes_written; | |
f5970550 | 477 | |
baa2f6ce ACM |
478 | if (!no_buildid) |
479 | process_buildids(); | |
361c99a6 | 480 | perf_header__write(&session->header, evsel_list, output, true); |
39d17dac | 481 | perf_session__delete(session); |
361c99a6 | 482 | perf_evlist__delete(evsel_list); |
d65a458b | 483 | symbol__exit(); |
c7929e47 | 484 | } |
f5970550 PZ |
485 | } |
486 | ||
23346f21 | 487 | static void event__synthesize_guest_os(struct machine *machine, void *data) |
a1645ce1 ZY |
488 | { |
489 | int err; | |
23346f21 | 490 | struct perf_session *psession = data; |
a1645ce1 | 491 | |
23346f21 | 492 | if (machine__is_host(machine)) |
a1645ce1 ZY |
493 | return; |
494 | ||
495 | /* | |
496 | *As for guest kernel when processing subcommand record&report, | |
497 | *we arrange module mmap prior to guest kernel mmap and trigger | |
498 | *a preload dso because default guest module symbols are loaded | |
499 | *from guest kallsyms instead of /lib/modules/XXX/XXX. This | |
500 | *method is used to avoid symbol missing when the first addr is | |
501 | *in module instead of in guest kernel. | |
502 | */ | |
503 | err = event__synthesize_modules(process_synthesized_event, | |
23346f21 | 504 | psession, machine); |
a1645ce1 ZY |
505 | if (err < 0) |
506 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 507 | " relocation symbol.\n", machine->pid); |
a1645ce1 | 508 | |
a1645ce1 ZY |
509 | /* |
510 | * We use _stext for guest kernel because guest kernel's /proc/kallsyms | |
511 | * have no _text sometimes. | |
512 | */ | |
513 | err = event__synthesize_kernel_mmap(process_synthesized_event, | |
23346f21 | 514 | psession, machine, "_text"); |
a1645ce1 ZY |
515 | if (err < 0) |
516 | err = event__synthesize_kernel_mmap(process_synthesized_event, | |
23346f21 | 517 | psession, machine, "_stext"); |
a1645ce1 ZY |
518 | if (err < 0) |
519 | pr_err("Couldn't record guest kernel [%d]'s reference" | |
23346f21 | 520 | " relocation symbol.\n", machine->pid); |
a1645ce1 ZY |
521 | } |
522 | ||
98402807 FW |
523 | static struct perf_event_header finished_round_event = { |
524 | .size = sizeof(struct perf_event_header), | |
525 | .type = PERF_RECORD_FINISHED_ROUND, | |
526 | }; | |
527 | ||
528 | static void mmap_read_all(void) | |
529 | { | |
0e2e63dd | 530 | int i; |
98402807 | 531 | |
dd7927f4 | 532 | for (i = 0; i < cpus->nr; i++) { |
0e2e63dd PZ |
533 | if (mmap_array[i].base) |
534 | mmap_read(&mmap_array[i]); | |
98402807 FW |
535 | } |
536 | ||
537 | if (perf_header__has_feat(&session->header, HEADER_TRACE_INFO)) | |
538 | write_output(&finished_round_event, sizeof(finished_round_event)); | |
539 | } | |
540 | ||
d4db3f16 | 541 | static int __cmd_record(int argc, const char **argv) |
16c8a109 | 542 | { |
69aad6f1 | 543 | int i; |
abaff32a | 544 | struct stat st; |
abaff32a | 545 | int flags; |
4dc0a04b | 546 | int err; |
8b412664 | 547 | unsigned long waking = 0; |
856e9660 | 548 | int child_ready_pipe[2], go_pipe[2]; |
46be604b | 549 | const bool forks = argc > 0; |
856e9660 | 550 | char buf; |
23346f21 | 551 | struct machine *machine; |
de9ac07b PZ |
552 | |
553 | page_size = sysconf(_SC_PAGE_SIZE); | |
de9ac07b | 554 | |
f5970550 PZ |
555 | atexit(sig_atexit); |
556 | signal(SIGCHLD, sig_handler); | |
557 | signal(SIGINT, sig_handler); | |
18483b81 | 558 | signal(SIGUSR1, sig_handler); |
f5970550 | 559 | |
d4db3f16 | 560 | if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) { |
856e9660 PZ |
561 | perror("failed to create pipes"); |
562 | exit(-1); | |
563 | } | |
564 | ||
529870e3 TZ |
565 | if (!strcmp(output_name, "-")) |
566 | pipe_output = 1; | |
567 | else if (!stat(output_name, &st) && st.st_size) { | |
7865e817 | 568 | if (write_mode == WRITE_FORCE) { |
b38d3464 ACM |
569 | char oldname[PATH_MAX]; |
570 | snprintf(oldname, sizeof(oldname), "%s.old", | |
571 | output_name); | |
572 | unlink(oldname); | |
573 | rename(output_name, oldname); | |
266e0e21 | 574 | } |
7865e817 FW |
575 | } else if (write_mode == WRITE_APPEND) { |
576 | write_mode = WRITE_FORCE; | |
97124d5e PZ |
577 | } |
578 | ||
f887f301 | 579 | flags = O_CREAT|O_RDWR; |
7865e817 | 580 | if (write_mode == WRITE_APPEND) |
f5970550 | 581 | file_new = 0; |
abaff32a IM |
582 | else |
583 | flags |= O_TRUNC; | |
584 | ||
529870e3 TZ |
585 | if (pipe_output) |
586 | output = STDOUT_FILENO; | |
587 | else | |
588 | output = open(output_name, flags, S_IRUSR | S_IWUSR); | |
de9ac07b PZ |
589 | if (output < 0) { |
590 | perror("failed to create output file"); | |
591 | exit(-1); | |
592 | } | |
593 | ||
7865e817 | 594 | session = perf_session__new(output_name, O_WRONLY, |
21ef97f0 | 595 | write_mode == WRITE_FORCE, false, NULL); |
94c744b6 | 596 | if (session == NULL) { |
a9a70bbc ACM |
597 | pr_err("Not enough memory for reading perf file header\n"); |
598 | return -1; | |
599 | } | |
600 | ||
baa2f6ce ACM |
601 | if (!no_buildid) |
602 | perf_header__set_feat(&session->header, HEADER_BUILD_ID); | |
603 | ||
4dc0a04b | 604 | if (!file_new) { |
8dc58101 | 605 | err = perf_header__read(session, output); |
4dc0a04b | 606 | if (err < 0) |
39d17dac | 607 | goto out_delete_session; |
4dc0a04b ACM |
608 | } |
609 | ||
361c99a6 | 610 | if (have_tracepoints(&evsel_list->entries)) |
94c744b6 | 611 | perf_header__set_feat(&session->header, HEADER_TRACE_INFO); |
03456a15 | 612 | |
39d17dac ACM |
613 | /* |
614 | * perf_session__delete(session) will be called at atexit_header() | |
615 | */ | |
f5970550 PZ |
616 | atexit(atexit_header); |
617 | ||
d4db3f16 | 618 | if (forks) { |
46be604b | 619 | child_pid = fork(); |
2fb750e8 | 620 | if (child_pid < 0) { |
856e9660 PZ |
621 | perror("failed to fork"); |
622 | exit(-1); | |
623 | } | |
7c6a1c65 | 624 | |
46be604b | 625 | if (!child_pid) { |
529870e3 TZ |
626 | if (pipe_output) |
627 | dup2(2, 1); | |
856e9660 PZ |
628 | close(child_ready_pipe[0]); |
629 | close(go_pipe[1]); | |
630 | fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC); | |
631 | ||
632 | /* | |
633 | * Do a dummy execvp to get the PLT entry resolved, | |
634 | * so we avoid the resolver overhead on the real | |
635 | * execvp call. | |
636 | */ | |
637 | execvp("", (char **)argv); | |
638 | ||
639 | /* | |
640 | * Tell the parent we're ready to go | |
641 | */ | |
642 | close(child_ready_pipe[1]); | |
643 | ||
644 | /* | |
645 | * Wait until the parent tells us to go. | |
646 | */ | |
647 | if (read(go_pipe[0], &buf, 1) == -1) | |
648 | perror("unable to read pipe"); | |
649 | ||
650 | execvp(argv[0], (char **)argv); | |
651 | ||
652 | perror(argv[0]); | |
18483b81 | 653 | kill(getppid(), SIGUSR1); |
856e9660 | 654 | exit(-1); |
0a5ac846 | 655 | } |
856e9660 | 656 | |
d6d901c2 | 657 | if (!system_wide && target_tid == -1 && target_pid == -1) |
5c98d466 | 658 | threads->map[0] = child_pid; |
d6d901c2 | 659 | |
856e9660 PZ |
660 | close(child_ready_pipe[1]); |
661 | close(go_pipe[0]); | |
662 | /* | |
663 | * wait for child to settle | |
664 | */ | |
665 | if (read(child_ready_pipe[0], &buf, 1) == -1) { | |
666 | perror("unable to read pipe"); | |
667 | exit(-1); | |
668 | } | |
669 | close(child_ready_pipe[0]); | |
670 | } | |
671 | ||
dd7927f4 | 672 | open_counters(evsel_list); |
de9ac07b | 673 | |
640c03ce ACM |
674 | perf_session__set_sample_type(session, sample_type); |
675 | ||
529870e3 TZ |
676 | if (pipe_output) { |
677 | err = perf_header__write_pipe(output); | |
678 | if (err < 0) | |
679 | return err; | |
680 | } else if (file_new) { | |
361c99a6 ACM |
681 | err = perf_header__write(&session->header, evsel_list, |
682 | output, false); | |
d5eed904 ACM |
683 | if (err < 0) |
684 | return err; | |
56b03f3c ACM |
685 | } |
686 | ||
6122e4e4 ACM |
687 | post_processing_offset = lseek(output, 0, SEEK_CUR); |
688 | ||
9c90a61c ACM |
689 | perf_session__set_sample_id_all(session, sample_id_all_avail); |
690 | ||
2c46dbb5 TZ |
691 | if (pipe_output) { |
692 | err = event__synthesize_attrs(&session->header, | |
693 | process_synthesized_event, | |
694 | session); | |
695 | if (err < 0) { | |
696 | pr_err("Couldn't synthesize attrs.\n"); | |
697 | return err; | |
698 | } | |
cd19a035 TZ |
699 | |
700 | err = event__synthesize_event_types(process_synthesized_event, | |
701 | session); | |
702 | if (err < 0) { | |
703 | pr_err("Couldn't synthesize event_types.\n"); | |
704 | return err; | |
705 | } | |
9215545e | 706 | |
361c99a6 | 707 | if (have_tracepoints(&evsel_list->entries)) { |
63e0c771 TZ |
708 | /* |
709 | * FIXME err <= 0 here actually means that | |
710 | * there were no tracepoints so its not really | |
711 | * an error, just that we don't need to | |
712 | * synthesize anything. We really have to | |
713 | * return this more properly and also | |
714 | * propagate errors that now are calling die() | |
715 | */ | |
361c99a6 | 716 | err = event__synthesize_tracing_data(output, evsel_list, |
63e0c771 TZ |
717 | process_synthesized_event, |
718 | session); | |
719 | if (err <= 0) { | |
720 | pr_err("Couldn't record tracing data.\n"); | |
721 | return err; | |
722 | } | |
2c9faa06 | 723 | advance_output(err); |
63e0c771 | 724 | } |
2c46dbb5 TZ |
725 | } |
726 | ||
23346f21 ACM |
727 | machine = perf_session__find_host_machine(session); |
728 | if (!machine) { | |
a1645ce1 ZY |
729 | pr_err("Couldn't find native kernel information.\n"); |
730 | return -1; | |
731 | } | |
732 | ||
56b03f3c | 733 | err = event__synthesize_kernel_mmap(process_synthesized_event, |
23346f21 | 734 | session, machine, "_text"); |
70162138 ACM |
735 | if (err < 0) |
736 | err = event__synthesize_kernel_mmap(process_synthesized_event, | |
23346f21 | 737 | session, machine, "_stext"); |
c1a3a4b9 ACM |
738 | if (err < 0) |
739 | pr_err("Couldn't record kernel reference relocation symbol\n" | |
740 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
741 | "Check /proc/kallsyms permission or run as root.\n"); | |
b7cece76 | 742 | |
a1645ce1 | 743 | err = event__synthesize_modules(process_synthesized_event, |
23346f21 | 744 | session, machine); |
c1a3a4b9 ACM |
745 | if (err < 0) |
746 | pr_err("Couldn't record kernel module information.\n" | |
747 | "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n" | |
748 | "Check /proc/modules permission or run as root.\n"); | |
749 | ||
a1645ce1 | 750 | if (perf_guest) |
23346f21 | 751 | perf_session__process_machines(session, event__synthesize_guest_os); |
7c6a1c65 | 752 | |
cf103a14 | 753 | if (!system_wide) |
d6d901c2 | 754 | event__synthesize_thread(target_tid, process_synthesized_event, |
d8f66248 | 755 | session); |
234fbbf5 | 756 | else |
d8f66248 | 757 | event__synthesize_threads(process_synthesized_event, session); |
7c6a1c65 | 758 | |
de9ac07b PZ |
759 | if (realtime_prio) { |
760 | struct sched_param param; | |
761 | ||
762 | param.sched_priority = realtime_prio; | |
763 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { | |
6beba7ad | 764 | pr_err("Could not set realtime priority.\n"); |
de9ac07b PZ |
765 | exit(-1); |
766 | } | |
767 | } | |
768 | ||
856e9660 PZ |
769 | /* |
770 | * Let the child rip | |
771 | */ | |
d4db3f16 ACM |
772 | if (forks) |
773 | close(go_pipe[1]); | |
856e9660 | 774 | |
649c48a9 | 775 | for (;;) { |
2debbc83 | 776 | int hits = samples; |
d6d901c2 | 777 | int thread; |
de9ac07b | 778 | |
98402807 | 779 | mmap_read_all(); |
de9ac07b | 780 | |
649c48a9 PZ |
781 | if (hits == samples) { |
782 | if (done) | |
783 | break; | |
5c581041 | 784 | err = poll(evsel_list->pollfd, evsel_list->nr_fds, -1); |
8b412664 PZ |
785 | waking++; |
786 | } | |
787 | ||
788 | if (done) { | |
dd7927f4 | 789 | for (i = 0; i < cpus->nr; i++) { |
69aad6f1 ACM |
790 | struct perf_evsel *pos; |
791 | ||
361c99a6 | 792 | list_for_each_entry(pos, &evsel_list->entries, node) { |
d6d901c2 | 793 | for (thread = 0; |
5c98d466 | 794 | thread < threads->nr; |
d6d901c2 | 795 | thread++) |
69aad6f1 | 796 | ioctl(FD(pos, i, thread), |
d6d901c2 ZY |
797 | PERF_EVENT_IOC_DISABLE); |
798 | } | |
8b412664 | 799 | } |
649c48a9 | 800 | } |
de9ac07b PZ |
801 | } |
802 | ||
18483b81 | 803 | if (quiet || signr == SIGUSR1) |
b44308f5 ACM |
804 | return 0; |
805 | ||
8b412664 PZ |
806 | fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); |
807 | ||
021e9f47 IM |
808 | /* |
809 | * Approximate RIP event size: 24 bytes. | |
810 | */ | |
811 | fprintf(stderr, | |
9486aa38 | 812 | "[ perf record: Captured and wrote %.3f MB %s (~%" PRIu64 " samples) ]\n", |
021e9f47 IM |
813 | (double)bytes_written / 1024.0 / 1024.0, |
814 | output_name, | |
815 | bytes_written / 24); | |
addc2785 | 816 | |
de9ac07b | 817 | return 0; |
39d17dac ACM |
818 | |
819 | out_delete_session: | |
820 | perf_session__delete(session); | |
821 | return err; | |
de9ac07b | 822 | } |
0e9b20b8 | 823 | |
0e9b20b8 | 824 | static const char * const record_usage[] = { |
9e096753 MG |
825 | "perf record [<options>] [<command>]", |
826 | "perf record [<options>] -- <command> [<options>]", | |
0e9b20b8 IM |
827 | NULL |
828 | }; | |
829 | ||
7865e817 FW |
830 | static bool force, append_file; |
831 | ||
bca647aa | 832 | const struct option record_options[] = { |
361c99a6 | 833 | OPT_CALLBACK('e', "event", &evsel_list, "event", |
86847b62 TG |
834 | "event selector. use 'perf list' to list available events", |
835 | parse_events), | |
361c99a6 | 836 | OPT_CALLBACK(0, "filter", &evsel_list, "filter", |
c171b552 | 837 | "event filter", parse_filter), |
0e9b20b8 | 838 | OPT_INTEGER('p', "pid", &target_pid, |
d6d901c2 ZY |
839 | "record events on existing process id"), |
840 | OPT_INTEGER('t', "tid", &target_tid, | |
841 | "record events on existing thread id"), | |
0e9b20b8 IM |
842 | OPT_INTEGER('r', "realtime", &realtime_prio, |
843 | "collect data with this RT SCHED_FIFO priority"), | |
acac03fa KS |
844 | OPT_BOOLEAN('D', "no-delay", &nodelay, |
845 | "collect data without buffering"), | |
daac07b2 FW |
846 | OPT_BOOLEAN('R', "raw-samples", &raw_samples, |
847 | "collect raw sample records from all opened counters"), | |
0e9b20b8 IM |
848 | OPT_BOOLEAN('a', "all-cpus", &system_wide, |
849 | "system-wide collection from all CPUs"), | |
abaff32a IM |
850 | OPT_BOOLEAN('A', "append", &append_file, |
851 | "append to the output file to do incremental profiling"), | |
c45c6ea2 SE |
852 | OPT_STRING('C', "cpu", &cpu_list, "cpu", |
853 | "list of cpus to monitor"), | |
97124d5e | 854 | OPT_BOOLEAN('f', "force", &force, |
7865e817 | 855 | "overwrite existing data file (deprecated)"), |
3de29cab | 856 | OPT_U64('c', "count", &user_interval, "event period to sample"), |
abaff32a IM |
857 | OPT_STRING('o', "output", &output_name, "file", |
858 | "output file name"), | |
2e6cdf99 SE |
859 | OPT_BOOLEAN('i', "no-inherit", &no_inherit, |
860 | "child tasks do not inherit counters"), | |
1967936d ACM |
861 | OPT_UINTEGER('F', "freq", &user_freq, "profile at this frequency"), |
862 | OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"), | |
3efa1cc9 IM |
863 | OPT_BOOLEAN('g', "call-graph", &call_graph, |
864 | "do call-graph (stack chain/backtrace) recording"), | |
c0555642 | 865 | OPT_INCR('v', "verbose", &verbose, |
3da297a6 | 866 | "be more verbose (show counter open errors, etc)"), |
b44308f5 | 867 | OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"), |
649c48a9 PZ |
868 | OPT_BOOLEAN('s', "stat", &inherit_stat, |
869 | "per thread counts"), | |
4bba828d AB |
870 | OPT_BOOLEAN('d', "data", &sample_address, |
871 | "Sample addresses"), | |
9c90a61c | 872 | OPT_BOOLEAN('T', "timestamp", &sample_time, "Sample timestamps"), |
649c48a9 PZ |
873 | OPT_BOOLEAN('n', "no-samples", &no_samples, |
874 | "don't sample"), | |
baa2f6ce | 875 | OPT_BOOLEAN('N', "no-buildid-cache", &no_buildid_cache, |
a1ac1d3c | 876 | "do not update the buildid cache"), |
baa2f6ce ACM |
877 | OPT_BOOLEAN('B', "no-buildid", &no_buildid, |
878 | "do not collect buildids in perf.data"), | |
0e9b20b8 IM |
879 | OPT_END() |
880 | }; | |
881 | ||
f37a291c | 882 | int cmd_record(int argc, const char **argv, const char *prefix __used) |
0e9b20b8 | 883 | { |
69aad6f1 ACM |
884 | int err = -ENOMEM; |
885 | struct perf_evsel *pos; | |
0e9b20b8 | 886 | |
361c99a6 ACM |
887 | evsel_list = perf_evlist__new(); |
888 | if (evsel_list == NULL) | |
889 | return -ENOMEM; | |
890 | ||
bca647aa | 891 | argc = parse_options(argc, argv, record_options, record_usage, |
655000e7 | 892 | PARSE_OPT_STOP_AT_NON_OPTION); |
d6d901c2 | 893 | if (!argc && target_pid == -1 && target_tid == -1 && |
c45c6ea2 | 894 | !system_wide && !cpu_list) |
bca647aa | 895 | usage_with_options(record_usage, record_options); |
0e9b20b8 | 896 | |
7865e817 FW |
897 | if (force && append_file) { |
898 | fprintf(stderr, "Can't overwrite and append at the same time." | |
899 | " You need to choose between -f and -A"); | |
bca647aa | 900 | usage_with_options(record_usage, record_options); |
7865e817 FW |
901 | } else if (append_file) { |
902 | write_mode = WRITE_APPEND; | |
903 | } else { | |
904 | write_mode = WRITE_FORCE; | |
905 | } | |
906 | ||
655000e7 | 907 | symbol__init(); |
baa2f6ce ACM |
908 | |
909 | if (no_buildid_cache || no_buildid) | |
a1ac1d3c | 910 | disable_buildid_cache(); |
655000e7 | 911 | |
361c99a6 ACM |
912 | if (evsel_list->nr_entries == 0 && |
913 | perf_evlist__add_default(evsel_list) < 0) { | |
69aad6f1 ACM |
914 | pr_err("Not enough memory for event selector list\n"); |
915 | goto out_symbol_exit; | |
bbd36e5e | 916 | } |
0e9b20b8 | 917 | |
5c98d466 | 918 | if (target_pid != -1) |
d6d901c2 | 919 | target_tid = target_pid; |
d6d901c2 | 920 | |
5c98d466 ACM |
921 | threads = thread_map__new(target_pid, target_tid); |
922 | if (threads == NULL) { | |
923 | pr_err("Problems finding threads of monitor\n"); | |
924 | usage_with_options(record_usage, record_options); | |
d6d901c2 ZY |
925 | } |
926 | ||
dd7927f4 ACM |
927 | if (target_tid != -1) |
928 | cpus = cpu_map__dummy_new(); | |
929 | else | |
930 | cpus = cpu_map__new(cpu_list); | |
931 | ||
932 | if (cpus == NULL) | |
933 | usage_with_options(record_usage, record_options); | |
69aad6f1 | 934 | |
361c99a6 | 935 | list_for_each_entry(pos, &evsel_list->entries, node) { |
5c98d466 | 936 | if (perf_evsel__alloc_fd(pos, cpus->nr, threads->nr) < 0) |
69aad6f1 | 937 | goto out_free_fd; |
ad7f4e3f ACM |
938 | if (perf_header__push_event(pos->attr.config, event_name(pos))) |
939 | goto out_free_fd; | |
d6d901c2 | 940 | } |
5c581041 ACM |
941 | |
942 | if (perf_evlist__alloc_pollfd(evsel_list, cpus->nr, threads->nr) < 0) | |
39d17dac | 943 | goto out_free_fd; |
d6d901c2 | 944 | |
3de29cab | 945 | if (user_interval != ULLONG_MAX) |
f9212819 FW |
946 | default_interval = user_interval; |
947 | if (user_freq != UINT_MAX) | |
948 | freq = user_freq; | |
949 | ||
7e4ff9e3 MG |
950 | /* |
951 | * User specified count overrides default frequency. | |
952 | */ | |
953 | if (default_interval) | |
954 | freq = 0; | |
955 | else if (freq) { | |
956 | default_interval = freq; | |
957 | } else { | |
958 | fprintf(stderr, "frequency and count are zero, aborting\n"); | |
39d17dac | 959 | err = -EINVAL; |
5c581041 | 960 | goto out_free_fd; |
7e4ff9e3 MG |
961 | } |
962 | ||
39d17dac ACM |
963 | err = __cmd_record(argc, argv); |
964 | ||
39d17dac | 965 | out_free_fd: |
5c98d466 ACM |
966 | thread_map__delete(threads); |
967 | threads = NULL; | |
d65a458b ACM |
968 | out_symbol_exit: |
969 | symbol__exit(); | |
39d17dac | 970 | return err; |
0e9b20b8 | 971 | } |