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" |
7c6a1c65 | 20 | |
97124d5e | 21 | #include <unistd.h> |
de9ac07b | 22 | #include <sched.h> |
de9ac07b | 23 | |
de9ac07b | 24 | static int fd[MAX_NR_CPUS][MAX_COUNTERS]; |
a21ca2ca | 25 | |
7e4ff9e3 | 26 | static long default_interval = 0; |
a21ca2ca | 27 | |
42e59d7d | 28 | static int nr_cpus = 0; |
de9ac07b | 29 | static unsigned int page_size; |
42e59d7d IM |
30 | static unsigned int mmap_pages = 128; |
31 | static int freq = 1000; | |
de9ac07b | 32 | static int output; |
23ac9cbe | 33 | static const char *output_name = "perf.data"; |
42e59d7d IM |
34 | static int group = 0; |
35 | static unsigned int realtime_prio = 0; | |
36 | static int raw_samples = 0; | |
37 | static int system_wide = 0; | |
38 | static int profile_cpu = -1; | |
39 | static pid_t target_pid = -1; | |
40 | static pid_t child_pid = -1; | |
41 | static int inherit = 1; | |
42 | static int force = 0; | |
43 | static int append_file = 0; | |
44 | static int call_graph = 0; | |
45 | static int inherit_stat = 0; | |
46 | static int no_samples = 0; | |
47 | static int sample_address = 0; | |
48 | static int multiplex = 0; | |
49 | static int multiplex_fd = -1; | |
50 | ||
51 | static long samples = 0; | |
a21ca2ca IM |
52 | static struct timeval last_read; |
53 | static struct timeval this_read; | |
54 | ||
42e59d7d | 55 | static u64 bytes_written = 0; |
a21ca2ca IM |
56 | |
57 | static struct pollfd event_array[MAX_NR_CPUS * MAX_COUNTERS]; | |
58 | ||
42e59d7d IM |
59 | static int nr_poll = 0; |
60 | static int nr_cpu = 0; | |
a21ca2ca | 61 | |
42e59d7d | 62 | static int file_new = 1; |
7c6a1c65 | 63 | |
42e59d7d | 64 | struct perf_header *header = NULL; |
f5970550 | 65 | |
de9ac07b | 66 | struct mmap_data { |
a21ca2ca IM |
67 | int counter; |
68 | void *base; | |
69 | unsigned int mask; | |
70 | unsigned int prev; | |
de9ac07b PZ |
71 | }; |
72 | ||
a21ca2ca IM |
73 | static struct mmap_data mmap_array[MAX_NR_CPUS][MAX_COUNTERS]; |
74 | ||
9d91a6f7 | 75 | static unsigned long mmap_read_head(struct mmap_data *md) |
de9ac07b | 76 | { |
cdd6c482 | 77 | struct perf_event_mmap_page *pc = md->base; |
9d91a6f7 | 78 | long head; |
de9ac07b PZ |
79 | |
80 | head = pc->data_head; | |
81 | rmb(); | |
82 | ||
83 | return head; | |
84 | } | |
85 | ||
9d91a6f7 PZ |
86 | static void mmap_write_tail(struct mmap_data *md, unsigned long tail) |
87 | { | |
cdd6c482 | 88 | struct perf_event_mmap_page *pc = md->base; |
9d91a6f7 PZ |
89 | |
90 | /* | |
91 | * ensure all reads are done before we write the tail out. | |
92 | */ | |
93 | /* mb(); */ | |
94 | pc->data_tail = tail; | |
95 | } | |
96 | ||
f5970550 PZ |
97 | static void write_output(void *buf, size_t size) |
98 | { | |
99 | while (size) { | |
100 | int ret = write(output, buf, size); | |
101 | ||
102 | if (ret < 0) | |
103 | die("failed to write"); | |
104 | ||
105 | size -= ret; | |
106 | buf += ret; | |
107 | ||
108 | bytes_written += ret; | |
109 | } | |
110 | } | |
111 | ||
234fbbf5 ACM |
112 | static int process_synthesized_event(event_t *event) |
113 | { | |
114 | write_output(event, event->header.size); | |
115 | return 0; | |
116 | } | |
117 | ||
de9ac07b PZ |
118 | static void mmap_read(struct mmap_data *md) |
119 | { | |
120 | unsigned int head = mmap_read_head(md); | |
121 | unsigned int old = md->prev; | |
122 | unsigned char *data = md->base + page_size; | |
123 | unsigned long size; | |
124 | void *buf; | |
125 | int diff; | |
126 | ||
127 | gettimeofday(&this_read, NULL); | |
128 | ||
129 | /* | |
130 | * If we're further behind than half the buffer, there's a chance | |
2debbc83 | 131 | * the writer will bite our tail and mess up the samples under us. |
de9ac07b PZ |
132 | * |
133 | * If we somehow ended up ahead of the head, we got messed up. | |
134 | * | |
135 | * In either case, truncate and restart at head. | |
136 | */ | |
137 | diff = head - old; | |
9d91a6f7 | 138 | if (diff < 0) { |
de9ac07b PZ |
139 | struct timeval iv; |
140 | unsigned long msecs; | |
141 | ||
142 | timersub(&this_read, &last_read, &iv); | |
143 | msecs = iv.tv_sec*1000 + iv.tv_usec/1000; | |
144 | ||
145 | fprintf(stderr, "WARNING: failed to keep up with mmap data." | |
146 | " Last read %lu msecs ago.\n", msecs); | |
147 | ||
148 | /* | |
149 | * head points to a known good entry, start there. | |
150 | */ | |
151 | old = head; | |
152 | } | |
153 | ||
154 | last_read = this_read; | |
155 | ||
156 | if (old != head) | |
2debbc83 | 157 | samples++; |
de9ac07b PZ |
158 | |
159 | size = head - old; | |
160 | ||
161 | if ((old & md->mask) + size != (head & md->mask)) { | |
162 | buf = &data[old & md->mask]; | |
163 | size = md->mask + 1 - (old & md->mask); | |
164 | old += size; | |
021e9f47 | 165 | |
f5970550 | 166 | write_output(buf, size); |
de9ac07b PZ |
167 | } |
168 | ||
169 | buf = &data[old & md->mask]; | |
170 | size = head - old; | |
171 | old += size; | |
021e9f47 | 172 | |
f5970550 | 173 | write_output(buf, size); |
de9ac07b PZ |
174 | |
175 | md->prev = old; | |
9d91a6f7 | 176 | mmap_write_tail(md, old); |
de9ac07b PZ |
177 | } |
178 | ||
179 | static volatile int done = 0; | |
f7b7c26e | 180 | static volatile int signr = -1; |
de9ac07b | 181 | |
16c8a109 | 182 | static void sig_handler(int sig) |
de9ac07b | 183 | { |
16c8a109 | 184 | done = 1; |
f7b7c26e PZ |
185 | signr = sig; |
186 | } | |
187 | ||
188 | static void sig_atexit(void) | |
189 | { | |
933da83a CW |
190 | if (child_pid != -1) |
191 | kill(child_pid, SIGTERM); | |
192 | ||
f7b7c26e PZ |
193 | if (signr == -1) |
194 | return; | |
195 | ||
196 | signal(signr, SIG_DFL); | |
197 | kill(getpid(), signr); | |
de9ac07b PZ |
198 | } |
199 | ||
f250c030 IM |
200 | static int group_fd; |
201 | ||
cdd6c482 | 202 | static struct perf_header_attr *get_header_attr(struct perf_event_attr *a, int nr) |
7c6a1c65 PZ |
203 | { |
204 | struct perf_header_attr *h_attr; | |
205 | ||
206 | if (nr < header->attrs) { | |
207 | h_attr = header->attr[nr]; | |
208 | } else { | |
209 | h_attr = perf_header_attr__new(a); | |
210 | perf_header__add_attr(header, h_attr); | |
211 | } | |
212 | ||
213 | return h_attr; | |
214 | } | |
215 | ||
f250c030 | 216 | static void create_counter(int counter, int cpu, pid_t pid) |
de9ac07b | 217 | { |
c171b552 | 218 | char *filter = filters[counter]; |
cdd6c482 | 219 | struct perf_event_attr *attr = attrs + counter; |
7c6a1c65 PZ |
220 | struct perf_header_attr *h_attr; |
221 | int track = !counter; /* only the first counter needs these */ | |
c171b552 | 222 | int ret; |
7c6a1c65 PZ |
223 | struct { |
224 | u64 count; | |
225 | u64 time_enabled; | |
226 | u64 time_running; | |
227 | u64 id; | |
228 | } read_data; | |
229 | ||
230 | attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | | |
231 | PERF_FORMAT_TOTAL_TIME_RUNNING | | |
232 | PERF_FORMAT_ID; | |
16c8a109 | 233 | |
3a9f131f | 234 | attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID; |
3efa1cc9 | 235 | |
1dba15e7 | 236 | if (freq) { |
ea1900e5 | 237 | attr->sample_type |= PERF_SAMPLE_PERIOD; |
a21ca2ca IM |
238 | attr->freq = 1; |
239 | attr->sample_freq = freq; | |
1dba15e7 | 240 | } |
3efa1cc9 | 241 | |
649c48a9 PZ |
242 | if (no_samples) |
243 | attr->sample_freq = 0; | |
244 | ||
245 | if (inherit_stat) | |
246 | attr->inherit_stat = 1; | |
247 | ||
4bba828d AB |
248 | if (sample_address) |
249 | attr->sample_type |= PERF_SAMPLE_ADDR; | |
250 | ||
3efa1cc9 IM |
251 | if (call_graph) |
252 | attr->sample_type |= PERF_SAMPLE_CALLCHAIN; | |
253 | ||
cd6feeea | 254 | if (raw_samples) { |
6ddf259d | 255 | attr->sample_type |= PERF_SAMPLE_TIME; |
daac07b2 | 256 | attr->sample_type |= PERF_SAMPLE_RAW; |
cd6feeea IM |
257 | attr->sample_type |= PERF_SAMPLE_CPU; |
258 | } | |
f413cdb8 | 259 | |
a21ca2ca IM |
260 | attr->mmap = track; |
261 | attr->comm = track; | |
262 | attr->inherit = (cpu < 0) && inherit; | |
4502d77c | 263 | attr->disabled = 1; |
16c8a109 | 264 | |
3da297a6 | 265 | try_again: |
cdd6c482 | 266 | fd[nr_cpu][counter] = sys_perf_event_open(attr, pid, cpu, group_fd, 0); |
16c8a109 | 267 | |
f250c030 IM |
268 | if (fd[nr_cpu][counter] < 0) { |
269 | int err = errno; | |
16c8a109 | 270 | |
f250c030 | 271 | if (err == EPERM) |
3da297a6 | 272 | die("Permission error - are you root?\n"); |
0a5ac846 JA |
273 | else if (err == ENODEV && profile_cpu != -1) |
274 | die("No such device - did you specify an out-of-range profile CPU?\n"); | |
3da297a6 IM |
275 | |
276 | /* | |
277 | * If it's cycles then fall back to hrtimer | |
278 | * based cpu-clock-tick sw counter, which | |
279 | * is always available even if no PMU support: | |
280 | */ | |
281 | if (attr->type == PERF_TYPE_HARDWARE | |
f4dbfa8f | 282 | && attr->config == PERF_COUNT_HW_CPU_CYCLES) { |
3da297a6 IM |
283 | |
284 | if (verbose) | |
285 | warning(" ... trying to fall back to cpu-clock-ticks\n"); | |
286 | attr->type = PERF_TYPE_SOFTWARE; | |
f4dbfa8f | 287 | attr->config = PERF_COUNT_SW_CPU_CLOCK; |
3da297a6 IM |
288 | goto try_again; |
289 | } | |
30c806a0 IM |
290 | printf("\n"); |
291 | error("perfcounter syscall returned with %d (%s)\n", | |
292 | fd[nr_cpu][counter], strerror(err)); | |
cdd6c482 | 293 | die("No CONFIG_PERF_EVENTS=y kernel support configured?\n"); |
f250c030 IM |
294 | exit(-1); |
295 | } | |
3da297a6 | 296 | |
7c6a1c65 PZ |
297 | h_attr = get_header_attr(attr, counter); |
298 | ||
299 | if (!file_new) { | |
300 | if (memcmp(&h_attr->attr, attr, sizeof(*attr))) { | |
301 | fprintf(stderr, "incompatible append\n"); | |
302 | exit(-1); | |
303 | } | |
304 | } | |
305 | ||
3928ddbe FW |
306 | if (read(fd[nr_cpu][counter], &read_data, sizeof(read_data)) == -1) { |
307 | perror("Unable to read perf file descriptor\n"); | |
308 | exit(-1); | |
309 | } | |
7c6a1c65 PZ |
310 | |
311 | perf_header_attr__add_id(h_attr, read_data.id); | |
312 | ||
f250c030 IM |
313 | assert(fd[nr_cpu][counter] >= 0); |
314 | fcntl(fd[nr_cpu][counter], F_SETFL, O_NONBLOCK); | |
16c8a109 | 315 | |
f250c030 IM |
316 | /* |
317 | * First counter acts as the group leader: | |
318 | */ | |
319 | if (group && group_fd == -1) | |
320 | group_fd = fd[nr_cpu][counter]; | |
ea57c4f5 IM |
321 | if (multiplex && multiplex_fd == -1) |
322 | multiplex_fd = fd[nr_cpu][counter]; | |
f250c030 | 323 | |
ea57c4f5 | 324 | if (multiplex && fd[nr_cpu][counter] != multiplex_fd) { |
4502d77c | 325 | |
cdd6c482 | 326 | ret = ioctl(fd[nr_cpu][counter], PERF_EVENT_IOC_SET_OUTPUT, multiplex_fd); |
ea57c4f5 IM |
327 | assert(ret != -1); |
328 | } else { | |
329 | event_array[nr_poll].fd = fd[nr_cpu][counter]; | |
330 | event_array[nr_poll].events = POLLIN; | |
331 | nr_poll++; | |
332 | ||
333 | mmap_array[nr_cpu][counter].counter = counter; | |
334 | mmap_array[nr_cpu][counter].prev = 0; | |
335 | mmap_array[nr_cpu][counter].mask = mmap_pages*page_size - 1; | |
336 | mmap_array[nr_cpu][counter].base = mmap(NULL, (mmap_pages+1)*page_size, | |
337 | PROT_READ|PROT_WRITE, MAP_SHARED, fd[nr_cpu][counter], 0); | |
338 | if (mmap_array[nr_cpu][counter].base == MAP_FAILED) { | |
339 | error("failed to mmap with %d (%s)\n", errno, strerror(errno)); | |
340 | exit(-1); | |
341 | } | |
342 | } | |
d1302522 | 343 | |
c171b552 LZ |
344 | if (filter != NULL) { |
345 | ret = ioctl(fd[nr_cpu][counter], | |
346 | PERF_EVENT_IOC_SET_FILTER, filter); | |
347 | if (ret) { | |
348 | error("failed to set filter with %d (%s)\n", errno, | |
349 | strerror(errno)); | |
350 | exit(-1); | |
351 | } | |
352 | } | |
353 | ||
cdd6c482 | 354 | ioctl(fd[nr_cpu][counter], PERF_EVENT_IOC_ENABLE); |
f250c030 | 355 | } |
f2521b6e | 356 | |
f250c030 IM |
357 | static void open_counters(int cpu, pid_t pid) |
358 | { | |
359 | int counter; | |
16c8a109 | 360 | |
f250c030 IM |
361 | group_fd = -1; |
362 | for (counter = 0; counter < nr_counters; counter++) | |
363 | create_counter(counter, cpu, pid); | |
364 | ||
16c8a109 PZ |
365 | nr_cpu++; |
366 | } | |
367 | ||
f5970550 PZ |
368 | static void atexit_header(void) |
369 | { | |
7c6a1c65 | 370 | header->data_size += bytes_written; |
f5970550 | 371 | |
7c6a1c65 | 372 | perf_header__write(header, output); |
f5970550 PZ |
373 | } |
374 | ||
0e9b20b8 | 375 | static int __cmd_record(int argc, const char **argv) |
16c8a109 PZ |
376 | { |
377 | int i, counter; | |
abaff32a | 378 | struct stat st; |
7c6a1c65 | 379 | pid_t pid = 0; |
abaff32a | 380 | int flags; |
de9ac07b | 381 | int ret; |
8b412664 | 382 | unsigned long waking = 0; |
de9ac07b PZ |
383 | |
384 | page_size = sysconf(_SC_PAGE_SIZE); | |
de9ac07b PZ |
385 | nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
386 | assert(nr_cpus <= MAX_NR_CPUS); | |
387 | assert(nr_cpus >= 0); | |
388 | ||
f5970550 PZ |
389 | atexit(sig_atexit); |
390 | signal(SIGCHLD, sig_handler); | |
391 | signal(SIGINT, sig_handler); | |
392 | ||
266e0e21 PH |
393 | if (!stat(output_name, &st) && st.st_size) { |
394 | if (!force && !append_file) { | |
395 | fprintf(stderr, "Error, output file %s exists, use -A to append or -f to overwrite.\n", | |
396 | output_name); | |
397 | exit(-1); | |
398 | } | |
399 | } else { | |
400 | append_file = 0; | |
97124d5e PZ |
401 | } |
402 | ||
abaff32a IM |
403 | flags = O_CREAT|O_RDWR; |
404 | if (append_file) | |
f5970550 | 405 | file_new = 0; |
abaff32a IM |
406 | else |
407 | flags |= O_TRUNC; | |
408 | ||
409 | output = open(output_name, flags, S_IRUSR|S_IWUSR); | |
de9ac07b PZ |
410 | if (output < 0) { |
411 | perror("failed to create output file"); | |
412 | exit(-1); | |
413 | } | |
414 | ||
7c6a1c65 PZ |
415 | if (!file_new) |
416 | header = perf_header__read(output); | |
417 | else | |
418 | header = perf_header__new(); | |
f5970550 | 419 | |
9df37ddd | 420 | if (raw_samples) { |
2ba08250 | 421 | perf_header__feat_trace_info(header); |
9df37ddd FW |
422 | } else { |
423 | for (i = 0; i < nr_counters; i++) { | |
424 | if (attrs[i].sample_type & PERF_SAMPLE_RAW) { | |
2ba08250 | 425 | perf_header__feat_trace_info(header); |
9df37ddd FW |
426 | break; |
427 | } | |
428 | } | |
429 | } | |
03456a15 | 430 | |
f5970550 PZ |
431 | atexit(atexit_header); |
432 | ||
1a853e36 | 433 | if (!system_wide) { |
7c6a1c65 PZ |
434 | pid = target_pid; |
435 | if (pid == -1) | |
436 | pid = getpid(); | |
437 | ||
0a5ac846 JA |
438 | open_counters(profile_cpu, pid); |
439 | } else { | |
440 | if (profile_cpu != -1) { | |
441 | open_counters(profile_cpu, target_pid); | |
442 | } else { | |
443 | for (i = 0; i < nr_cpus; i++) | |
444 | open_counters(i, target_pid); | |
445 | } | |
446 | } | |
de9ac07b | 447 | |
7c6a1c65 PZ |
448 | if (file_new) |
449 | perf_header__write(header, output); | |
450 | ||
234fbbf5 ACM |
451 | if (!system_wide) |
452 | event__synthesize_thread(pid, process_synthesized_event); | |
453 | else | |
454 | event__synthesize_threads(process_synthesized_event); | |
7c6a1c65 | 455 | |
ef65b2a0 | 456 | if (target_pid == -1 && argc) { |
1a853e36 ACM |
457 | pid = fork(); |
458 | if (pid < 0) | |
459 | perror("failed to fork"); | |
de9ac07b | 460 | |
1a853e36 | 461 | if (!pid) { |
0e9b20b8 | 462 | if (execvp(argv[0], (char **)argv)) { |
1a853e36 ACM |
463 | perror(argv[0]); |
464 | exit(-1); | |
465 | } | |
de9ac07b | 466 | } |
933da83a CW |
467 | |
468 | child_pid = pid; | |
de9ac07b PZ |
469 | } |
470 | ||
471 | if (realtime_prio) { | |
472 | struct sched_param param; | |
473 | ||
474 | param.sched_priority = realtime_prio; | |
475 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { | |
6beba7ad | 476 | pr_err("Could not set realtime priority.\n"); |
de9ac07b PZ |
477 | exit(-1); |
478 | } | |
479 | } | |
480 | ||
649c48a9 | 481 | for (;;) { |
2debbc83 | 482 | int hits = samples; |
de9ac07b | 483 | |
16c8a109 | 484 | for (i = 0; i < nr_cpu; i++) { |
ea57c4f5 IM |
485 | for (counter = 0; counter < nr_counters; counter++) { |
486 | if (mmap_array[i][counter].base) | |
487 | mmap_read(&mmap_array[i][counter]); | |
488 | } | |
de9ac07b PZ |
489 | } |
490 | ||
649c48a9 PZ |
491 | if (hits == samples) { |
492 | if (done) | |
493 | break; | |
8b412664 PZ |
494 | ret = poll(event_array, nr_poll, -1); |
495 | waking++; | |
496 | } | |
497 | ||
498 | if (done) { | |
499 | for (i = 0; i < nr_cpu; i++) { | |
500 | for (counter = 0; counter < nr_counters; counter++) | |
cdd6c482 | 501 | ioctl(fd[i][counter], PERF_EVENT_IOC_DISABLE); |
8b412664 | 502 | } |
649c48a9 | 503 | } |
de9ac07b PZ |
504 | } |
505 | ||
8b412664 PZ |
506 | fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking); |
507 | ||
021e9f47 IM |
508 | /* |
509 | * Approximate RIP event size: 24 bytes. | |
510 | */ | |
511 | fprintf(stderr, | |
2debbc83 | 512 | "[ perf record: Captured and wrote %.3f MB %s (~%lld samples) ]\n", |
021e9f47 IM |
513 | (double)bytes_written / 1024.0 / 1024.0, |
514 | output_name, | |
515 | bytes_written / 24); | |
addc2785 | 516 | |
de9ac07b PZ |
517 | return 0; |
518 | } | |
0e9b20b8 | 519 | |
0e9b20b8 | 520 | static const char * const record_usage[] = { |
9e096753 MG |
521 | "perf record [<options>] [<command>]", |
522 | "perf record [<options>] -- <command> [<options>]", | |
0e9b20b8 IM |
523 | NULL |
524 | }; | |
525 | ||
5242519b | 526 | static const struct option options[] = { |
0e9b20b8 | 527 | OPT_CALLBACK('e', "event", NULL, "event", |
86847b62 TG |
528 | "event selector. use 'perf list' to list available events", |
529 | parse_events), | |
c171b552 LZ |
530 | OPT_CALLBACK(0, "filter", NULL, "filter", |
531 | "event filter", parse_filter), | |
0e9b20b8 IM |
532 | OPT_INTEGER('p', "pid", &target_pid, |
533 | "record events on existing pid"), | |
534 | OPT_INTEGER('r', "realtime", &realtime_prio, | |
535 | "collect data with this RT SCHED_FIFO priority"), | |
daac07b2 FW |
536 | OPT_BOOLEAN('R', "raw-samples", &raw_samples, |
537 | "collect raw sample records from all opened counters"), | |
0e9b20b8 IM |
538 | OPT_BOOLEAN('a', "all-cpus", &system_wide, |
539 | "system-wide collection from all CPUs"), | |
abaff32a IM |
540 | OPT_BOOLEAN('A', "append", &append_file, |
541 | "append to the output file to do incremental profiling"), | |
0a5ac846 JA |
542 | OPT_INTEGER('C', "profile_cpu", &profile_cpu, |
543 | "CPU to profile on"), | |
97124d5e PZ |
544 | OPT_BOOLEAN('f', "force", &force, |
545 | "overwrite existing data file"), | |
e61078a0 | 546 | OPT_LONG('c', "count", &default_interval, |
abaff32a IM |
547 | "event period to sample"), |
548 | OPT_STRING('o', "output", &output_name, "file", | |
549 | "output file name"), | |
550 | OPT_BOOLEAN('i', "inherit", &inherit, | |
551 | "child tasks inherit counters"), | |
cf1f4574 IM |
552 | OPT_INTEGER('F', "freq", &freq, |
553 | "profile at this frequency"), | |
abaff32a IM |
554 | OPT_INTEGER('m', "mmap-pages", &mmap_pages, |
555 | "number of mmap data pages"), | |
3efa1cc9 IM |
556 | OPT_BOOLEAN('g', "call-graph", &call_graph, |
557 | "do call-graph (stack chain/backtrace) recording"), | |
3da297a6 IM |
558 | OPT_BOOLEAN('v', "verbose", &verbose, |
559 | "be more verbose (show counter open errors, etc)"), | |
649c48a9 PZ |
560 | OPT_BOOLEAN('s', "stat", &inherit_stat, |
561 | "per thread counts"), | |
4bba828d AB |
562 | OPT_BOOLEAN('d', "data", &sample_address, |
563 | "Sample addresses"), | |
649c48a9 PZ |
564 | OPT_BOOLEAN('n', "no-samples", &no_samples, |
565 | "don't sample"), | |
d1302522 FW |
566 | OPT_BOOLEAN('M', "multiplex", &multiplex, |
567 | "multiplex counter output in a single channel"), | |
0e9b20b8 IM |
568 | OPT_END() |
569 | }; | |
570 | ||
f37a291c | 571 | int cmd_record(int argc, const char **argv, const char *prefix __used) |
0e9b20b8 IM |
572 | { |
573 | int counter; | |
574 | ||
a0541234 AB |
575 | argc = parse_options(argc, argv, options, record_usage, |
576 | PARSE_OPT_STOP_AT_NON_OPTION); | |
ef65b2a0 | 577 | if (!argc && target_pid == -1 && !system_wide) |
0e9b20b8 IM |
578 | usage_with_options(record_usage, options); |
579 | ||
bbd36e5e PZ |
580 | if (!nr_counters) { |
581 | nr_counters = 1; | |
582 | attrs[0].type = PERF_TYPE_HARDWARE; | |
583 | attrs[0].config = PERF_COUNT_HW_CPU_CYCLES; | |
584 | } | |
0e9b20b8 | 585 | |
7e4ff9e3 MG |
586 | /* |
587 | * User specified count overrides default frequency. | |
588 | */ | |
589 | if (default_interval) | |
590 | freq = 0; | |
591 | else if (freq) { | |
592 | default_interval = freq; | |
593 | } else { | |
594 | fprintf(stderr, "frequency and count are zero, aborting\n"); | |
595 | exit(EXIT_FAILURE); | |
596 | } | |
597 | ||
0e9b20b8 | 598 | for (counter = 0; counter < nr_counters; counter++) { |
a21ca2ca | 599 | if (attrs[counter].sample_period) |
0e9b20b8 IM |
600 | continue; |
601 | ||
a21ca2ca | 602 | attrs[counter].sample_period = default_interval; |
0e9b20b8 IM |
603 | } |
604 | ||
605 | return __cmd_record(argc, argv); | |
606 | } |