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 | */ |
16f762a2 | 8 | #include "builtin.h" |
bf9e1876 IM |
9 | |
10 | #include "perf.h" | |
11 | ||
6eda5838 | 12 | #include "util/util.h" |
0e9b20b8 | 13 | #include "util/parse-options.h" |
8ad8db37 | 14 | #include "util/parse-events.h" |
a0055ae2 | 15 | #include "util/string.h" |
6eda5838 | 16 | |
7c6a1c65 | 17 | #include "util/header.h" |
66e274f3 | 18 | #include "util/event.h" |
8f28827a | 19 | #include "util/debug.h" |
8d06367f | 20 | #include "util/symbol.h" |
7c6a1c65 | 21 | |
97124d5e | 22 | #include <unistd.h> |
de9ac07b | 23 | #include <sched.h> |
de9ac07b | 24 | |
de9ac07b | 25 | static int fd[MAX_NR_CPUS][MAX_COUNTERS]; |
a21ca2ca | 26 | |
7e4ff9e3 | 27 | static long default_interval = 0; |
a21ca2ca | 28 | |
42e59d7d | 29 | static int nr_cpus = 0; |
de9ac07b | 30 | static unsigned int page_size; |
42e59d7d IM |
31 | static unsigned int mmap_pages = 128; |
32 | static int freq = 1000; | |
de9ac07b | 33 | static int output; |
23ac9cbe | 34 | static const char *output_name = "perf.data"; |
42e59d7d IM |
35 | static int group = 0; |
36 | static unsigned int realtime_prio = 0; | |
37 | static int raw_samples = 0; | |
38 | static int system_wide = 0; | |
39 | static int profile_cpu = -1; | |
40 | static pid_t target_pid = -1; | |
41 | static pid_t child_pid = -1; | |
42 | static int inherit = 1; | |
43 | static int force = 0; | |
44 | static int append_file = 0; | |
45 | static int call_graph = 0; | |
46 | static int inherit_stat = 0; | |
47 | static int no_samples = 0; | |
48 | static int sample_address = 0; | |
49 | static int multiplex = 0; | |
50 | static int multiplex_fd = -1; | |
51 | ||
52 | static long samples = 0; | |
a21ca2ca IM |
53 | static struct timeval last_read; |
54 | static struct timeval this_read; | |
55 | ||
42e59d7d | 56 | static u64 bytes_written = 0; |
a21ca2ca IM |
57 | |
58 | static struct pollfd event_array[MAX_NR_CPUS * MAX_COUNTERS]; | |
59 | ||
42e59d7d IM |
60 | static int nr_poll = 0; |
61 | static int nr_cpu = 0; | |
a21ca2ca | 62 | |
42e59d7d | 63 | static int file_new = 1; |
7c6a1c65 | 64 | |
42e59d7d | 65 | struct perf_header *header = NULL; |
f5970550 | 66 | |
de9ac07b | 67 | struct mmap_data { |
a21ca2ca IM |
68 | int counter; |
69 | void *base; | |
70 | unsigned int mask; | |
71 | unsigned int prev; | |
de9ac07b PZ |
72 | }; |
73 | ||
a21ca2ca IM |
74 | static struct mmap_data mmap_array[MAX_NR_CPUS][MAX_COUNTERS]; |
75 | ||
9d91a6f7 | 76 | static unsigned long mmap_read_head(struct mmap_data *md) |
de9ac07b | 77 | { |
cdd6c482 | 78 | struct perf_event_mmap_page *pc = md->base; |
9d91a6f7 | 79 | long head; |
de9ac07b PZ |
80 | |
81 | head = pc->data_head; | |
82 | rmb(); | |
83 | ||
84 | return head; | |
85 | } | |
86 | ||
9d91a6f7 PZ |
87 | static void mmap_write_tail(struct mmap_data *md, unsigned long tail) |
88 | { | |
cdd6c482 | 89 | struct perf_event_mmap_page *pc = md->base; |
9d91a6f7 PZ |
90 | |
91 | /* | |
92 | * ensure all reads are done before we write the tail out. | |
93 | */ | |
94 | /* mb(); */ | |
95 | pc->data_tail = tail; | |
96 | } | |
97 | ||
f5970550 PZ |
98 | static void write_output(void *buf, size_t size) |
99 | { | |
100 | while (size) { | |
101 | int ret = write(output, buf, size); | |
102 | ||
103 | if (ret < 0) | |
104 | die("failed to write"); | |
105 | ||
106 | size -= ret; | |
107 | buf += ret; | |
108 | ||
109 | bytes_written += ret; | |
110 | } | |
111 | } | |
112 | ||
8d06367f ACM |
113 | static void write_event(event_t *buf, size_t size) |
114 | { | |
115 | /* | |
116 | * Add it to the list of DSOs, so that when we finish this | |
117 | * record session we can pick the available build-ids. | |
118 | */ | |
119 | if (buf->header.type == PERF_RECORD_MMAP) | |
120 | dsos__findnew(buf->mmap.filename); | |
121 | ||
122 | write_output(buf, size); | |
123 | } | |
124 | ||
234fbbf5 ACM |
125 | static int process_synthesized_event(event_t *event) |
126 | { | |
8d06367f | 127 | write_event(event, event->header.size); |
234fbbf5 ACM |
128 | return 0; |
129 | } | |
130 | ||
de9ac07b PZ |
131 | static void mmap_read(struct mmap_data *md) |
132 | { | |
133 | unsigned int head = mmap_read_head(md); | |
134 | unsigned int old = md->prev; | |
135 | unsigned char *data = md->base + page_size; | |
136 | unsigned long size; | |
137 | void *buf; | |
138 | int diff; | |
139 | ||
140 | gettimeofday(&this_read, NULL); | |
141 | ||
142 | /* | |
143 | * If we're further behind than half the buffer, there's a chance | |
2debbc83 | 144 | * the writer will bite our tail and mess up the samples under us. |
de9ac07b PZ |
145 | * |
146 | * If we somehow ended up ahead of the head, we got messed up. | |
147 | * | |
148 | * In either case, truncate and restart at head. | |
149 | */ | |
150 | diff = head - old; | |
9d91a6f7 | 151 | if (diff < 0) { |
de9ac07b PZ |
152 | struct timeval iv; |
153 | unsigned long msecs; | |
154 | ||
155 | timersub(&this_read, &last_read, &iv); | |
156 | msecs = iv.tv_sec*1000 + iv.tv_usec/1000; | |
157 | ||
158 | fprintf(stderr, "WARNING: failed to keep up with mmap data." | |
159 | " Last read %lu msecs ago.\n", msecs); | |
160 | ||
161 | /* | |
162 | * head points to a known good entry, start there. | |
163 | */ | |
164 | old = head; | |
165 | } | |
166 | ||
167 | last_read = this_read; | |
168 | ||
169 | if (old != head) | |
2debbc83 | 170 | samples++; |
de9ac07b PZ |
171 | |
172 | size = head - old; | |
173 | ||
174 | if ((old & md->mask) + size != (head & md->mask)) { | |
175 | buf = &data[old & md->mask]; | |
176 | size = md->mask + 1 - (old & md->mask); | |
177 | old += size; | |
021e9f47 | 178 | |
8d06367f | 179 | write_event(buf, size); |
de9ac07b PZ |
180 | } |
181 | ||
182 | buf = &data[old & md->mask]; | |
183 | size = head - old; | |
184 | old += size; | |
021e9f47 | 185 | |
8d06367f | 186 | write_event(buf, size); |
de9ac07b PZ |
187 | |
188 | md->prev = old; | |
9d91a6f7 | 189 | mmap_write_tail(md, old); |
de9ac07b PZ |
190 | } |
191 | ||
192 | static volatile int done = 0; | |
f7b7c26e | 193 | static volatile int signr = -1; |
de9ac07b | 194 | |
16c8a109 | 195 | static void sig_handler(int sig) |
de9ac07b | 196 | { |
16c8a109 | 197 | done = 1; |
f7b7c26e PZ |
198 | signr = sig; |
199 | } | |
200 | ||
201 | static void sig_atexit(void) | |
202 | { | |
933da83a CW |
203 | if (child_pid != -1) |
204 | kill(child_pid, SIGTERM); | |
205 | ||
f7b7c26e PZ |
206 | if (signr == -1) |
207 | return; | |
208 | ||
209 | signal(signr, SIG_DFL); | |
210 | kill(getpid(), signr); | |
de9ac07b PZ |
211 | } |
212 | ||
f250c030 IM |
213 | static int group_fd; |
214 | ||
cdd6c482 | 215 | static struct perf_header_attr *get_header_attr(struct perf_event_attr *a, int nr) |
7c6a1c65 PZ |
216 | { |
217 | struct perf_header_attr *h_attr; | |
218 | ||
219 | if (nr < header->attrs) { | |
220 | h_attr = header->attr[nr]; | |
221 | } else { | |
222 | h_attr = perf_header_attr__new(a); | |
dc79c0fc | 223 | if (h_attr != NULL) |
11deb1f9 ACM |
224 | if (perf_header__add_attr(header, h_attr) < 0) { |
225 | perf_header_attr__delete(h_attr); | |
226 | h_attr = NULL; | |
227 | } | |
7c6a1c65 PZ |
228 | } |
229 | ||
230 | return h_attr; | |
231 | } | |
232 | ||
f250c030 | 233 | static void create_counter(int counter, int cpu, pid_t pid) |
de9ac07b | 234 | { |
c171b552 | 235 | char *filter = filters[counter]; |
cdd6c482 | 236 | struct perf_event_attr *attr = attrs + counter; |
7c6a1c65 PZ |
237 | struct perf_header_attr *h_attr; |
238 | int track = !counter; /* only the first counter needs these */ | |
c171b552 | 239 | int ret; |
7c6a1c65 PZ |
240 | struct { |
241 | u64 count; | |
242 | u64 time_enabled; | |
243 | u64 time_running; | |
244 | u64 id; | |
245 | } read_data; | |
246 | ||
247 | attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | | |
248 | PERF_FORMAT_TOTAL_TIME_RUNNING | | |
249 | PERF_FORMAT_ID; | |
16c8a109 | 250 | |
3a9f131f | 251 | attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID; |
3efa1cc9 | 252 | |
1dba15e7 | 253 | if (freq) { |
ea1900e5 | 254 | attr->sample_type |= PERF_SAMPLE_PERIOD; |
a21ca2ca IM |
255 | attr->freq = 1; |
256 | attr->sample_freq = freq; | |
1dba15e7 | 257 | } |
3efa1cc9 | 258 | |
649c48a9 PZ |
259 | if (no_samples) |
260 | attr->sample_freq = 0; | |
261 | ||
262 | if (inherit_stat) | |
263 | attr->inherit_stat = 1; | |
264 | ||
4bba828d AB |
265 | if (sample_address) |
266 | attr->sample_type |= PERF_SAMPLE_ADDR; | |
267 | ||
3efa1cc9 IM |
268 | if (call_graph) |
269 | attr->sample_type |= PERF_SAMPLE_CALLCHAIN; | |
270 | ||
cd6feeea | 271 | if (raw_samples) { |
6ddf259d | 272 | attr->sample_type |= PERF_SAMPLE_TIME; |
daac07b2 | 273 | attr->sample_type |= PERF_SAMPLE_RAW; |
cd6feeea IM |
274 | attr->sample_type |= PERF_SAMPLE_CPU; |
275 | } | |
f413cdb8 | 276 | |
a21ca2ca IM |
277 | attr->mmap = track; |
278 | attr->comm = track; | |
279 | attr->inherit = (cpu < 0) && inherit; | |
4502d77c | 280 | attr->disabled = 1; |
16c8a109 | 281 | |
3da297a6 | 282 | try_again: |
cdd6c482 | 283 | fd[nr_cpu][counter] = sys_perf_event_open(attr, pid, cpu, group_fd, 0); |
16c8a109 | 284 | |
f250c030 IM |
285 | if (fd[nr_cpu][counter] < 0) { |
286 | int err = errno; | |
16c8a109 | 287 | |
c10edee2 | 288 | if (err == EPERM || err == EACCES) |
3da297a6 | 289 | die("Permission error - are you root?\n"); |
0a5ac846 JA |
290 | else if (err == ENODEV && profile_cpu != -1) |
291 | die("No such device - did you specify an out-of-range profile CPU?\n"); | |
3da297a6 IM |
292 | |
293 | /* | |
294 | * If it's cycles then fall back to hrtimer | |
295 | * based cpu-clock-tick sw counter, which | |
296 | * is always available even if no PMU support: | |
297 | */ | |
298 | if (attr->type == PERF_TYPE_HARDWARE | |
f4dbfa8f | 299 | && attr->config == PERF_COUNT_HW_CPU_CYCLES) { |
3da297a6 IM |
300 | |
301 | if (verbose) | |
302 | warning(" ... trying to fall back to cpu-clock-ticks\n"); | |
303 | attr->type = PERF_TYPE_SOFTWARE; | |
f4dbfa8f | 304 | attr->config = PERF_COUNT_SW_CPU_CLOCK; |
3da297a6 IM |
305 | goto try_again; |
306 | } | |
30c806a0 IM |
307 | printf("\n"); |
308 | error("perfcounter syscall returned with %d (%s)\n", | |
309 | fd[nr_cpu][counter], strerror(err)); | |
cdd6c482 | 310 | die("No CONFIG_PERF_EVENTS=y kernel support configured?\n"); |
f250c030 IM |
311 | exit(-1); |
312 | } | |
3da297a6 | 313 | |
7c6a1c65 | 314 | h_attr = get_header_attr(attr, counter); |
dc79c0fc ACM |
315 | if (h_attr == NULL) |
316 | die("nomem\n"); | |
7c6a1c65 PZ |
317 | |
318 | if (!file_new) { | |
319 | if (memcmp(&h_attr->attr, attr, sizeof(*attr))) { | |
320 | fprintf(stderr, "incompatible append\n"); | |
321 | exit(-1); | |
322 | } | |
323 | } | |
324 | ||
3928ddbe FW |
325 | if (read(fd[nr_cpu][counter], &read_data, sizeof(read_data)) == -1) { |
326 | perror("Unable to read perf file descriptor\n"); | |
327 | exit(-1); | |
328 | } | |
7c6a1c65 | 329 | |
58754121 ACM |
330 | if (perf_header_attr__add_id(h_attr, read_data.id) < 0) { |
331 | pr_warning("Not enough memory to add id\n"); | |
332 | exit(-1); | |
333 | } | |
7c6a1c65 | 334 | |
f250c030 IM |
335 | assert(fd[nr_cpu][counter] >= 0); |
336 | fcntl(fd[nr_cpu][counter], F_SETFL, O_NONBLOCK); | |
16c8a109 | 337 | |
f250c030 IM |
338 | /* |
339 | * First counter acts as the group leader: | |
340 | */ | |
341 | if (group && group_fd == -1) | |
342 | group_fd = fd[nr_cpu][counter]; | |
ea57c4f5 IM |
343 | if (multiplex && multiplex_fd == -1) |
344 | multiplex_fd = fd[nr_cpu][counter]; | |
f250c030 | 345 | |
ea57c4f5 | 346 | if (multiplex && fd[nr_cpu][counter] != multiplex_fd) { |
4502d77c | 347 | |
cdd6c482 | 348 | ret = ioctl(fd[nr_cpu][counter], PERF_EVENT_IOC_SET_OUTPUT, multiplex_fd); |
ea57c4f5 IM |
349 | assert(ret != -1); |
350 | } else { | |
351 | event_array[nr_poll].fd = fd[nr_cpu][counter]; | |
352 | event_array[nr_poll].events = POLLIN; | |
353 | nr_poll++; | |
354 | ||
355 | mmap_array[nr_cpu][counter].counter = counter; | |
356 | mmap_array[nr_cpu][counter].prev = 0; | |
357 | mmap_array[nr_cpu][counter].mask = mmap_pages*page_size - 1; | |
358 | mmap_array[nr_cpu][counter].base = mmap(NULL, (mmap_pages+1)*page_size, | |
359 | PROT_READ|PROT_WRITE, MAP_SHARED, fd[nr_cpu][counter], 0); | |
360 | if (mmap_array[nr_cpu][counter].base == MAP_FAILED) { | |
361 | error("failed to mmap with %d (%s)\n", errno, strerror(errno)); | |
362 | exit(-1); | |
363 | } | |
364 | } | |
d1302522 | 365 | |
c171b552 LZ |
366 | if (filter != NULL) { |
367 | ret = ioctl(fd[nr_cpu][counter], | |
368 | PERF_EVENT_IOC_SET_FILTER, filter); | |
369 | if (ret) { | |
370 | error("failed to set filter with %d (%s)\n", errno, | |
371 | strerror(errno)); | |
372 | exit(-1); | |
373 | } | |
374 | } | |
375 | ||
cdd6c482 | 376 | ioctl(fd[nr_cpu][counter], PERF_EVENT_IOC_ENABLE); |
f250c030 | 377 | } |
f2521b6e | 378 | |
f250c030 IM |
379 | static void open_counters(int cpu, pid_t pid) |
380 | { | |
381 | int counter; | |
16c8a109 | 382 | |
f250c030 IM |
383 | group_fd = -1; |
384 | for (counter = 0; counter < nr_counters; counter++) | |
385 | create_counter(counter, cpu, pid); | |
386 | ||
16c8a109 PZ |
387 | nr_cpu++; |
388 | } | |
389 | ||
f5970550 PZ |
390 | static void atexit_header(void) |
391 | { | |
7c6a1c65 | 392 | header->data_size += bytes_written; |
f5970550 | 393 | |
8671dab9 | 394 | perf_header__write(header, output, true); |
f5970550 PZ |
395 | } |
396 | ||
0e9b20b8 | 397 | static int __cmd_record(int argc, const char **argv) |
16c8a109 PZ |
398 | { |
399 | int i, counter; | |
abaff32a | 400 | struct stat st; |
7c6a1c65 | 401 | pid_t pid = 0; |
abaff32a | 402 | int flags; |
4dc0a04b | 403 | int err; |
8b412664 | 404 | unsigned long waking = 0; |
de9ac07b PZ |
405 | |
406 | page_size = sysconf(_SC_PAGE_SIZE); | |
de9ac07b PZ |
407 | nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
408 | assert(nr_cpus <= MAX_NR_CPUS); | |
409 | assert(nr_cpus >= 0); | |
410 | ||
f5970550 PZ |
411 | atexit(sig_atexit); |
412 | signal(SIGCHLD, sig_handler); | |
413 | signal(SIGINT, sig_handler); | |
414 | ||
266e0e21 PH |
415 | if (!stat(output_name, &st) && st.st_size) { |
416 | if (!force && !append_file) { | |
417 | fprintf(stderr, "Error, output file %s exists, use -A to append or -f to overwrite.\n", | |
418 | output_name); | |
419 | exit(-1); | |
420 | } | |
421 | } else { | |
422 | append_file = 0; | |
97124d5e PZ |
423 | } |
424 | ||
abaff32a IM |
425 | flags = O_CREAT|O_RDWR; |
426 | if (append_file) | |
f5970550 | 427 | file_new = 0; |
abaff32a IM |
428 | else |
429 | flags |= O_TRUNC; | |
430 | ||
431 | output = open(output_name, flags, S_IRUSR|S_IWUSR); | |
de9ac07b PZ |
432 | if (output < 0) { |
433 | perror("failed to create output file"); | |
434 | exit(-1); | |
435 | } | |
436 | ||
4dc0a04b | 437 | header = perf_header__new(); |
a9a70bbc ACM |
438 | if (header == NULL) { |
439 | pr_err("Not enough memory for reading perf file header\n"); | |
440 | return -1; | |
441 | } | |
442 | ||
4dc0a04b ACM |
443 | if (!file_new) { |
444 | err = perf_header__read(header, output); | |
445 | if (err < 0) | |
446 | return err; | |
447 | } | |
448 | ||
9df37ddd | 449 | if (raw_samples) { |
3e13ab2d | 450 | perf_header__set_feat(header, HEADER_TRACE_INFO); |
9df37ddd FW |
451 | } else { |
452 | for (i = 0; i < nr_counters; i++) { | |
453 | if (attrs[i].sample_type & PERF_SAMPLE_RAW) { | |
3e13ab2d | 454 | perf_header__set_feat(header, HEADER_TRACE_INFO); |
9df37ddd FW |
455 | break; |
456 | } | |
457 | } | |
458 | } | |
03456a15 | 459 | |
f5970550 PZ |
460 | atexit(atexit_header); |
461 | ||
1a853e36 | 462 | if (!system_wide) { |
7c6a1c65 PZ |
463 | pid = target_pid; |
464 | if (pid == -1) | |
465 | pid = getpid(); | |
466 | ||
0a5ac846 JA |
467 | open_counters(profile_cpu, pid); |
468 | } else { | |
469 | if (profile_cpu != -1) { | |
470 | open_counters(profile_cpu, target_pid); | |
471 | } else { | |
472 | for (i = 0; i < nr_cpus; i++) | |
473 | open_counters(i, target_pid); | |
474 | } | |
475 | } | |
de9ac07b | 476 | |
d5eed904 ACM |
477 | if (file_new) { |
478 | err = perf_header__write(header, output, false); | |
479 | if (err < 0) | |
480 | return err; | |
481 | } | |
7c6a1c65 | 482 | |
234fbbf5 ACM |
483 | if (!system_wide) |
484 | event__synthesize_thread(pid, process_synthesized_event); | |
485 | else | |
486 | event__synthesize_threads(process_synthesized_event); | |
7c6a1c65 | 487 | |
ef65b2a0 | 488 | if (target_pid == -1 && argc) { |
1a853e36 ACM |
489 | pid = fork(); |
490 | if (pid < 0) | |
de896721 | 491 | die("failed to fork"); |
de9ac07b | 492 | |
1a853e36 | 493 | if (!pid) { |
0e9b20b8 | 494 | if (execvp(argv[0], (char **)argv)) { |
1a853e36 ACM |
495 | perror(argv[0]); |
496 | exit(-1); | |
497 | } | |
de896721 FW |
498 | } else { |
499 | /* | |
500 | * Wait a bit for the execv'ed child to appear | |
501 | * and be updated in /proc | |
502 | * FIXME: Do you know a less heuristical solution? | |
503 | */ | |
504 | usleep(1000); | |
505 | event__synthesize_thread(pid, | |
506 | process_synthesized_event); | |
de9ac07b | 507 | } |
933da83a CW |
508 | |
509 | child_pid = pid; | |
de9ac07b PZ |
510 | } |
511 | ||
512 | if (realtime_prio) { | |
513 | struct sched_param param; | |
514 | ||
515 | param.sched_priority = realtime_prio; | |
516 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { | |
6beba7ad | 517 | pr_err("Could not set realtime priority.\n"); |
de9ac07b PZ |
518 | exit(-1); |
519 | } | |
520 | } | |
521 | ||
649c48a9 | 522 | for (;;) { |
2debbc83 | 523 | int hits = samples; |
de9ac07b | 524 | |
16c8a109 | 525 | for (i = 0; i < nr_cpu; i++) { |
ea57c4f5 IM |
526 | for (counter = 0; counter < nr_counters; counter++) { |
527 | if (mmap_array[i][counter].base) | |
528 | mmap_read(&mmap_array[i][counter]); | |
529 | } | |
de9ac07b PZ |
530 | } |
531 | ||
649c48a9 PZ |
532 | if (hits == samples) { |
533 | if (done) | |
534 | break; | |
4dc0a04b | 535 | err = poll(event_array, nr_poll, -1); |
8b412664 PZ |
536 | waking++; |
537 | } | |
538 | ||
539 | if (done) { | |
540 | for (i = 0; i < nr_cpu; i++) { | |
541 | for (counter = 0; counter < nr_counters; counter++) | |
cdd6c482 | 542 | ioctl(fd[i][counter], PERF_EVENT_IOC_DISABLE); |
8b412664 | 543 | } |
649c48a9 | 544 | } |
de9ac07b PZ |
545 | } |
546 | ||
8b412664 PZ |
547 | fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); |
548 | ||
021e9f47 IM |
549 | /* |
550 | * Approximate RIP event size: 24 bytes. | |
551 | */ | |
552 | fprintf(stderr, | |
2debbc83 | 553 | "[ perf record: Captured and wrote %.3f MB %s (~%lld samples) ]\n", |
021e9f47 IM |
554 | (double)bytes_written / 1024.0 / 1024.0, |
555 | output_name, | |
556 | bytes_written / 24); | |
addc2785 | 557 | |
de9ac07b PZ |
558 | return 0; |
559 | } | |
0e9b20b8 | 560 | |
0e9b20b8 | 561 | static const char * const record_usage[] = { |
9e096753 MG |
562 | "perf record [<options>] [<command>]", |
563 | "perf record [<options>] -- <command> [<options>]", | |
0e9b20b8 IM |
564 | NULL |
565 | }; | |
566 | ||
5242519b | 567 | static const struct option options[] = { |
0e9b20b8 | 568 | OPT_CALLBACK('e', "event", NULL, "event", |
86847b62 TG |
569 | "event selector. use 'perf list' to list available events", |
570 | parse_events), | |
c171b552 LZ |
571 | OPT_CALLBACK(0, "filter", NULL, "filter", |
572 | "event filter", parse_filter), | |
0e9b20b8 IM |
573 | OPT_INTEGER('p', "pid", &target_pid, |
574 | "record events on existing pid"), | |
575 | OPT_INTEGER('r', "realtime", &realtime_prio, | |
576 | "collect data with this RT SCHED_FIFO priority"), | |
daac07b2 FW |
577 | OPT_BOOLEAN('R', "raw-samples", &raw_samples, |
578 | "collect raw sample records from all opened counters"), | |
0e9b20b8 IM |
579 | OPT_BOOLEAN('a', "all-cpus", &system_wide, |
580 | "system-wide collection from all CPUs"), | |
abaff32a IM |
581 | OPT_BOOLEAN('A', "append", &append_file, |
582 | "append to the output file to do incremental profiling"), | |
0a5ac846 JA |
583 | OPT_INTEGER('C', "profile_cpu", &profile_cpu, |
584 | "CPU to profile on"), | |
97124d5e PZ |
585 | OPT_BOOLEAN('f', "force", &force, |
586 | "overwrite existing data file"), | |
e61078a0 | 587 | OPT_LONG('c', "count", &default_interval, |
abaff32a IM |
588 | "event period to sample"), |
589 | OPT_STRING('o', "output", &output_name, "file", | |
590 | "output file name"), | |
591 | OPT_BOOLEAN('i', "inherit", &inherit, | |
592 | "child tasks inherit counters"), | |
cf1f4574 IM |
593 | OPT_INTEGER('F', "freq", &freq, |
594 | "profile at this frequency"), | |
abaff32a IM |
595 | OPT_INTEGER('m', "mmap-pages", &mmap_pages, |
596 | "number of mmap data pages"), | |
3efa1cc9 IM |
597 | OPT_BOOLEAN('g', "call-graph", &call_graph, |
598 | "do call-graph (stack chain/backtrace) recording"), | |
3da297a6 IM |
599 | OPT_BOOLEAN('v', "verbose", &verbose, |
600 | "be more verbose (show counter open errors, etc)"), | |
649c48a9 PZ |
601 | OPT_BOOLEAN('s', "stat", &inherit_stat, |
602 | "per thread counts"), | |
4bba828d AB |
603 | OPT_BOOLEAN('d', "data", &sample_address, |
604 | "Sample addresses"), | |
649c48a9 PZ |
605 | OPT_BOOLEAN('n', "no-samples", &no_samples, |
606 | "don't sample"), | |
d1302522 FW |
607 | OPT_BOOLEAN('M', "multiplex", &multiplex, |
608 | "multiplex counter output in a single channel"), | |
0e9b20b8 IM |
609 | OPT_END() |
610 | }; | |
611 | ||
f37a291c | 612 | int cmd_record(int argc, const char **argv, const char *prefix __used) |
0e9b20b8 IM |
613 | { |
614 | int counter; | |
615 | ||
8d06367f ACM |
616 | symbol__init(0); |
617 | ||
a0541234 AB |
618 | argc = parse_options(argc, argv, options, record_usage, |
619 | PARSE_OPT_STOP_AT_NON_OPTION); | |
ef65b2a0 | 620 | if (!argc && target_pid == -1 && !system_wide) |
0e9b20b8 IM |
621 | usage_with_options(record_usage, options); |
622 | ||
bbd36e5e PZ |
623 | if (!nr_counters) { |
624 | nr_counters = 1; | |
625 | attrs[0].type = PERF_TYPE_HARDWARE; | |
626 | attrs[0].config = PERF_COUNT_HW_CPU_CYCLES; | |
627 | } | |
0e9b20b8 | 628 | |
7e4ff9e3 MG |
629 | /* |
630 | * User specified count overrides default frequency. | |
631 | */ | |
632 | if (default_interval) | |
633 | freq = 0; | |
634 | else if (freq) { | |
635 | default_interval = freq; | |
636 | } else { | |
637 | fprintf(stderr, "frequency and count are zero, aborting\n"); | |
638 | exit(EXIT_FAILURE); | |
639 | } | |
640 | ||
0e9b20b8 | 641 | for (counter = 0; counter < nr_counters; counter++) { |
a21ca2ca | 642 | if (attrs[counter].sample_period) |
0e9b20b8 IM |
643 | continue; |
644 | ||
a21ca2ca | 645 | attrs[counter].sample_period = default_interval; |
0e9b20b8 IM |
646 | } |
647 | ||
648 | return __cmd_record(argc, argv); | |
649 | } |