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 | |
97124d5e | 17 | #include <unistd.h> |
de9ac07b | 18 | #include <sched.h> |
de9ac07b | 19 | |
0e9b20b8 IM |
20 | #define ALIGN(x, a) __ALIGN_MASK(x, (typeof(x))(a)-1) |
21 | #define __ALIGN_MASK(x, mask) (((x)+(mask))&~(mask)) | |
1a853e36 | 22 | |
de9ac07b | 23 | static int fd[MAX_NR_CPUS][MAX_COUNTERS]; |
a21ca2ca IM |
24 | |
25 | static long default_interval = 100000; | |
26 | ||
3cf165fc | 27 | static int nr_cpus = 0; |
de9ac07b | 28 | static unsigned int page_size; |
3cf165fc | 29 | static unsigned int mmap_pages = 128; |
cf1f4574 | 30 | static int freq = 0; |
de9ac07b | 31 | static int output; |
23ac9cbe | 32 | static const char *output_name = "perf.data"; |
de9ac07b | 33 | static int group = 0; |
16c8a109 PZ |
34 | static unsigned int realtime_prio = 0; |
35 | static int system_wide = 0; | |
1a853e36 | 36 | static pid_t target_pid = -1; |
16c8a109 | 37 | static int inherit = 1; |
97124d5e | 38 | static int force = 0; |
abaff32a | 39 | static int append_file = 0; |
3da297a6 | 40 | static int verbose = 0; |
de9ac07b | 41 | |
a21ca2ca IM |
42 | static long samples; |
43 | static struct timeval last_read; | |
44 | static struct timeval this_read; | |
45 | ||
46 | static __u64 bytes_written; | |
47 | ||
48 | static struct pollfd event_array[MAX_NR_CPUS * MAX_COUNTERS]; | |
49 | ||
50 | static int nr_poll; | |
51 | static int nr_cpu; | |
52 | ||
53 | struct mmap_event { | |
54 | struct perf_event_header header; | |
55 | __u32 pid; | |
56 | __u32 tid; | |
57 | __u64 start; | |
58 | __u64 len; | |
59 | __u64 pgoff; | |
60 | char filename[PATH_MAX]; | |
61 | }; | |
62 | ||
63 | struct comm_event { | |
64 | struct perf_event_header header; | |
65 | __u32 pid; | |
66 | __u32 tid; | |
67 | char comm[16]; | |
de9ac07b PZ |
68 | }; |
69 | ||
a21ca2ca | 70 | |
de9ac07b | 71 | struct mmap_data { |
a21ca2ca IM |
72 | int counter; |
73 | void *base; | |
74 | unsigned int mask; | |
75 | unsigned int prev; | |
de9ac07b PZ |
76 | }; |
77 | ||
a21ca2ca IM |
78 | static struct mmap_data mmap_array[MAX_NR_CPUS][MAX_COUNTERS]; |
79 | ||
de9ac07b PZ |
80 | static unsigned int mmap_read_head(struct mmap_data *md) |
81 | { | |
82 | struct perf_counter_mmap_page *pc = md->base; | |
83 | int head; | |
84 | ||
85 | head = pc->data_head; | |
86 | rmb(); | |
87 | ||
88 | return head; | |
89 | } | |
90 | ||
de9ac07b PZ |
91 | static void mmap_read(struct mmap_data *md) |
92 | { | |
93 | unsigned int head = mmap_read_head(md); | |
94 | unsigned int old = md->prev; | |
95 | unsigned char *data = md->base + page_size; | |
96 | unsigned long size; | |
97 | void *buf; | |
98 | int diff; | |
99 | ||
100 | gettimeofday(&this_read, NULL); | |
101 | ||
102 | /* | |
103 | * If we're further behind than half the buffer, there's a chance | |
2debbc83 | 104 | * the writer will bite our tail and mess up the samples under us. |
de9ac07b PZ |
105 | * |
106 | * If we somehow ended up ahead of the head, we got messed up. | |
107 | * | |
108 | * In either case, truncate and restart at head. | |
109 | */ | |
110 | diff = head - old; | |
111 | if (diff > md->mask / 2 || diff < 0) { | |
112 | struct timeval iv; | |
113 | unsigned long msecs; | |
114 | ||
115 | timersub(&this_read, &last_read, &iv); | |
116 | msecs = iv.tv_sec*1000 + iv.tv_usec/1000; | |
117 | ||
118 | fprintf(stderr, "WARNING: failed to keep up with mmap data." | |
119 | " Last read %lu msecs ago.\n", msecs); | |
120 | ||
121 | /* | |
122 | * head points to a known good entry, start there. | |
123 | */ | |
124 | old = head; | |
125 | } | |
126 | ||
127 | last_read = this_read; | |
128 | ||
129 | if (old != head) | |
2debbc83 | 130 | samples++; |
de9ac07b PZ |
131 | |
132 | size = head - old; | |
133 | ||
134 | if ((old & md->mask) + size != (head & md->mask)) { | |
135 | buf = &data[old & md->mask]; | |
136 | size = md->mask + 1 - (old & md->mask); | |
137 | old += size; | |
021e9f47 | 138 | |
de9ac07b PZ |
139 | while (size) { |
140 | int ret = write(output, buf, size); | |
021e9f47 IM |
141 | |
142 | if (ret < 0) | |
143 | die("failed to write"); | |
144 | ||
de9ac07b PZ |
145 | size -= ret; |
146 | buf += ret; | |
021e9f47 IM |
147 | |
148 | bytes_written += ret; | |
de9ac07b PZ |
149 | } |
150 | } | |
151 | ||
152 | buf = &data[old & md->mask]; | |
153 | size = head - old; | |
154 | old += size; | |
021e9f47 | 155 | |
de9ac07b PZ |
156 | while (size) { |
157 | int ret = write(output, buf, size); | |
021e9f47 IM |
158 | |
159 | if (ret < 0) | |
160 | die("failed to write"); | |
161 | ||
de9ac07b PZ |
162 | size -= ret; |
163 | buf += ret; | |
021e9f47 IM |
164 | |
165 | bytes_written += ret; | |
de9ac07b PZ |
166 | } |
167 | ||
168 | md->prev = old; | |
169 | } | |
170 | ||
171 | static volatile int done = 0; | |
f7b7c26e | 172 | static volatile int signr = -1; |
de9ac07b | 173 | |
16c8a109 | 174 | static void sig_handler(int sig) |
de9ac07b | 175 | { |
16c8a109 | 176 | done = 1; |
f7b7c26e PZ |
177 | signr = sig; |
178 | } | |
179 | ||
180 | static void sig_atexit(void) | |
181 | { | |
182 | if (signr == -1) | |
183 | return; | |
184 | ||
185 | signal(signr, SIG_DFL); | |
186 | kill(getpid(), signr); | |
de9ac07b PZ |
187 | } |
188 | ||
f70e87d7 | 189 | static void pid_synthesize_comm_event(pid_t pid, int full) |
1a853e36 | 190 | { |
16f762a2 | 191 | struct comm_event comm_ev; |
1a853e36 ACM |
192 | char filename[PATH_MAX]; |
193 | char bf[BUFSIZ]; | |
a0055ae2 | 194 | int fd, ret; |
1a853e36 | 195 | size_t size; |
a0055ae2 | 196 | char *field, *sep; |
f70e87d7 PZ |
197 | DIR *tasks; |
198 | struct dirent dirent, *next; | |
1a853e36 ACM |
199 | |
200 | snprintf(filename, sizeof(filename), "/proc/%d/stat", pid); | |
201 | ||
202 | fd = open(filename, O_RDONLY); | |
203 | if (fd < 0) { | |
204 | fprintf(stderr, "couldn't open %s\n", filename); | |
205 | exit(EXIT_FAILURE); | |
206 | } | |
207 | if (read(fd, bf, sizeof(bf)) < 0) { | |
208 | fprintf(stderr, "couldn't read %s\n", filename); | |
209 | exit(EXIT_FAILURE); | |
210 | } | |
211 | close(fd); | |
212 | ||
a0055ae2 | 213 | /* 9027 (cat) R 6747 9027 6747 34816 9027 ... */ |
1a853e36 | 214 | memset(&comm_ev, 0, sizeof(comm_ev)); |
a0055ae2 ACM |
215 | field = strchr(bf, '('); |
216 | if (field == NULL) | |
217 | goto out_failure; | |
218 | sep = strchr(++field, ')'); | |
219 | if (sep == NULL) | |
220 | goto out_failure; | |
221 | size = sep - field; | |
222 | memcpy(comm_ev.comm, field, size++); | |
f70e87d7 PZ |
223 | |
224 | comm_ev.pid = pid; | |
1a853e36 | 225 | comm_ev.header.type = PERF_EVENT_COMM; |
729ff5e2 | 226 | size = ALIGN(size, sizeof(__u64)); |
1a853e36 | 227 | comm_ev.header.size = sizeof(comm_ev) - (sizeof(comm_ev.comm) - size); |
16f762a2 | 228 | |
f70e87d7 PZ |
229 | if (!full) { |
230 | comm_ev.tid = pid; | |
231 | ||
232 | ret = write(output, &comm_ev, comm_ev.header.size); | |
233 | if (ret < 0) { | |
234 | perror("failed to write"); | |
235 | exit(-1); | |
236 | } | |
237 | return; | |
238 | } | |
239 | ||
240 | snprintf(filename, sizeof(filename), "/proc/%d/task", pid); | |
241 | ||
242 | tasks = opendir(filename); | |
243 | while (!readdir_r(tasks, &dirent, &next) && next) { | |
244 | char *end; | |
245 | pid = strtol(dirent.d_name, &end, 10); | |
246 | if (*end) | |
247 | continue; | |
248 | ||
249 | comm_ev.tid = pid; | |
250 | ||
251 | ret = write(output, &comm_ev, comm_ev.header.size); | |
252 | if (ret < 0) { | |
253 | perror("failed to write"); | |
254 | exit(-1); | |
255 | } | |
1a853e36 | 256 | } |
f70e87d7 PZ |
257 | closedir(tasks); |
258 | return; | |
259 | ||
a0055ae2 ACM |
260 | out_failure: |
261 | fprintf(stderr, "couldn't get COMM and pgid, malformed %s\n", | |
262 | filename); | |
263 | exit(EXIT_FAILURE); | |
1a853e36 ACM |
264 | } |
265 | ||
2debbc83 | 266 | static void pid_synthesize_mmap_samples(pid_t pid) |
1a853e36 ACM |
267 | { |
268 | char filename[PATH_MAX]; | |
269 | FILE *fp; | |
270 | ||
271 | snprintf(filename, sizeof(filename), "/proc/%d/maps", pid); | |
272 | ||
273 | fp = fopen(filename, "r"); | |
274 | if (fp == NULL) { | |
275 | fprintf(stderr, "couldn't open %s\n", filename); | |
276 | exit(EXIT_FAILURE); | |
277 | } | |
278 | while (1) { | |
a0055ae2 | 279 | char bf[BUFSIZ], *pbf = bf; |
1a853e36 ACM |
280 | struct mmap_event mmap_ev = { |
281 | .header.type = PERF_EVENT_MMAP, | |
282 | }; | |
a0055ae2 | 283 | int n; |
1a853e36 ACM |
284 | size_t size; |
285 | if (fgets(bf, sizeof(bf), fp) == NULL) | |
286 | break; | |
287 | ||
288 | /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */ | |
a0055ae2 ACM |
289 | n = hex2u64(pbf, &mmap_ev.start); |
290 | if (n < 0) | |
291 | continue; | |
292 | pbf += n + 1; | |
293 | n = hex2u64(pbf, &mmap_ev.len); | |
294 | if (n < 0) | |
295 | continue; | |
296 | pbf += n + 3; | |
297 | if (*pbf == 'x') { /* vm_exec */ | |
1a853e36 ACM |
298 | char *execname = strrchr(bf, ' '); |
299 | ||
300 | if (execname == NULL || execname[1] != '/') | |
301 | continue; | |
302 | ||
303 | execname += 1; | |
304 | size = strlen(execname); | |
305 | execname[size - 1] = '\0'; /* Remove \n */ | |
306 | memcpy(mmap_ev.filename, execname, size); | |
729ff5e2 | 307 | size = ALIGN(size, sizeof(__u64)); |
1a853e36 ACM |
308 | mmap_ev.len -= mmap_ev.start; |
309 | mmap_ev.header.size = (sizeof(mmap_ev) - | |
310 | (sizeof(mmap_ev.filename) - size)); | |
f70e87d7 | 311 | mmap_ev.pid = pid; |
1a853e36 ACM |
312 | mmap_ev.tid = pid; |
313 | ||
314 | if (write(output, &mmap_ev, mmap_ev.header.size) < 0) { | |
315 | perror("failed to write"); | |
316 | exit(-1); | |
317 | } | |
318 | } | |
319 | } | |
320 | ||
321 | fclose(fp); | |
322 | } | |
323 | ||
2debbc83 | 324 | static void synthesize_samples(void) |
f70e87d7 PZ |
325 | { |
326 | DIR *proc; | |
327 | struct dirent dirent, *next; | |
328 | ||
329 | proc = opendir("/proc"); | |
330 | ||
331 | while (!readdir_r(proc, &dirent, &next) && next) { | |
332 | char *end; | |
333 | pid_t pid; | |
334 | ||
335 | pid = strtol(dirent.d_name, &end, 10); | |
336 | if (*end) /* only interested in proper numerical dirents */ | |
337 | continue; | |
338 | ||
339 | pid_synthesize_comm_event(pid, 1); | |
2debbc83 | 340 | pid_synthesize_mmap_samples(pid); |
f70e87d7 PZ |
341 | } |
342 | ||
343 | closedir(proc); | |
344 | } | |
345 | ||
f250c030 IM |
346 | static int group_fd; |
347 | ||
348 | static void create_counter(int counter, int cpu, pid_t pid) | |
de9ac07b | 349 | { |
a21ca2ca | 350 | struct perf_counter_attr *attr = attrs + counter; |
16c8a109 | 351 | int track = 1; |
16c8a109 | 352 | |
ea1900e5 | 353 | attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID; |
1dba15e7 | 354 | if (freq) { |
ea1900e5 | 355 | attr->sample_type |= PERF_SAMPLE_PERIOD; |
a21ca2ca IM |
356 | attr->freq = 1; |
357 | attr->sample_freq = freq; | |
1dba15e7 | 358 | } |
a21ca2ca IM |
359 | attr->mmap = track; |
360 | attr->comm = track; | |
361 | attr->inherit = (cpu < 0) && inherit; | |
4502d77c | 362 | attr->disabled = 1; |
16c8a109 | 363 | |
f250c030 | 364 | track = 0; /* only the first counter needs these */ |
16c8a109 | 365 | |
3da297a6 | 366 | try_again: |
a21ca2ca | 367 | fd[nr_cpu][counter] = sys_perf_counter_open(attr, pid, cpu, group_fd, 0); |
16c8a109 | 368 | |
f250c030 IM |
369 | if (fd[nr_cpu][counter] < 0) { |
370 | int err = errno; | |
16c8a109 | 371 | |
f250c030 | 372 | if (err == EPERM) |
3da297a6 IM |
373 | die("Permission error - are you root?\n"); |
374 | ||
375 | /* | |
376 | * If it's cycles then fall back to hrtimer | |
377 | * based cpu-clock-tick sw counter, which | |
378 | * is always available even if no PMU support: | |
379 | */ | |
380 | if (attr->type == PERF_TYPE_HARDWARE | |
f4dbfa8f | 381 | && attr->config == PERF_COUNT_HW_CPU_CYCLES) { |
3da297a6 IM |
382 | |
383 | if (verbose) | |
384 | warning(" ... trying to fall back to cpu-clock-ticks\n"); | |
385 | attr->type = PERF_TYPE_SOFTWARE; | |
f4dbfa8f | 386 | attr->config = PERF_COUNT_SW_CPU_CLOCK; |
3da297a6 IM |
387 | goto try_again; |
388 | } | |
30c806a0 IM |
389 | printf("\n"); |
390 | error("perfcounter syscall returned with %d (%s)\n", | |
391 | fd[nr_cpu][counter], strerror(err)); | |
392 | die("No CONFIG_PERF_COUNTERS=y kernel support configured?\n"); | |
f250c030 IM |
393 | exit(-1); |
394 | } | |
3da297a6 | 395 | |
f250c030 IM |
396 | assert(fd[nr_cpu][counter] >= 0); |
397 | fcntl(fd[nr_cpu][counter], F_SETFL, O_NONBLOCK); | |
16c8a109 | 398 | |
f250c030 IM |
399 | /* |
400 | * First counter acts as the group leader: | |
401 | */ | |
402 | if (group && group_fd == -1) | |
403 | group_fd = fd[nr_cpu][counter]; | |
404 | ||
405 | event_array[nr_poll].fd = fd[nr_cpu][counter]; | |
406 | event_array[nr_poll].events = POLLIN; | |
407 | nr_poll++; | |
408 | ||
409 | mmap_array[nr_cpu][counter].counter = counter; | |
410 | mmap_array[nr_cpu][counter].prev = 0; | |
411 | mmap_array[nr_cpu][counter].mask = mmap_pages*page_size - 1; | |
412 | mmap_array[nr_cpu][counter].base = mmap(NULL, (mmap_pages+1)*page_size, | |
413 | PROT_READ, MAP_SHARED, fd[nr_cpu][counter], 0); | |
414 | if (mmap_array[nr_cpu][counter].base == MAP_FAILED) { | |
415 | error("failed to mmap with %d (%s)\n", errno, strerror(errno)); | |
416 | exit(-1); | |
417 | } | |
4502d77c PZ |
418 | |
419 | ioctl(fd[nr_cpu][counter], PERF_COUNTER_IOC_ENABLE); | |
f250c030 | 420 | } |
f2521b6e | 421 | |
f250c030 IM |
422 | static void open_counters(int cpu, pid_t pid) |
423 | { | |
424 | int counter; | |
16c8a109 | 425 | |
f250c030 IM |
426 | if (pid > 0) { |
427 | pid_synthesize_comm_event(pid, 0); | |
2debbc83 | 428 | pid_synthesize_mmap_samples(pid); |
16c8a109 | 429 | } |
f250c030 IM |
430 | |
431 | group_fd = -1; | |
432 | for (counter = 0; counter < nr_counters; counter++) | |
433 | create_counter(counter, cpu, pid); | |
434 | ||
16c8a109 PZ |
435 | nr_cpu++; |
436 | } | |
437 | ||
0e9b20b8 | 438 | static int __cmd_record(int argc, const char **argv) |
16c8a109 PZ |
439 | { |
440 | int i, counter; | |
abaff32a | 441 | struct stat st; |
de9ac07b | 442 | pid_t pid; |
abaff32a | 443 | int flags; |
de9ac07b PZ |
444 | int ret; |
445 | ||
446 | page_size = sysconf(_SC_PAGE_SIZE); | |
de9ac07b PZ |
447 | nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
448 | assert(nr_cpus <= MAX_NR_CPUS); | |
449 | assert(nr_cpus >= 0); | |
450 | ||
abaff32a IM |
451 | if (!stat(output_name, &st) && !force && !append_file) { |
452 | fprintf(stderr, "Error, output file %s exists, use -A to append or -f to overwrite.\n", | |
97124d5e PZ |
453 | output_name); |
454 | exit(-1); | |
455 | } | |
456 | ||
abaff32a IM |
457 | flags = O_CREAT|O_RDWR; |
458 | if (append_file) | |
459 | flags |= O_APPEND; | |
460 | else | |
461 | flags |= O_TRUNC; | |
462 | ||
463 | output = open(output_name, flags, S_IRUSR|S_IWUSR); | |
de9ac07b PZ |
464 | if (output < 0) { |
465 | perror("failed to create output file"); | |
466 | exit(-1); | |
467 | } | |
468 | ||
1a853e36 | 469 | if (!system_wide) { |
df97992c | 470 | open_counters(-1, target_pid != -1 ? target_pid : getpid()); |
1a853e36 ACM |
471 | } else for (i = 0; i < nr_cpus; i++) |
472 | open_counters(i, target_pid); | |
de9ac07b | 473 | |
f7b7c26e | 474 | atexit(sig_atexit); |
16c8a109 PZ |
475 | signal(SIGCHLD, sig_handler); |
476 | signal(SIGINT, sig_handler); | |
de9ac07b | 477 | |
ef65b2a0 | 478 | if (target_pid == -1 && argc) { |
1a853e36 ACM |
479 | pid = fork(); |
480 | if (pid < 0) | |
481 | perror("failed to fork"); | |
de9ac07b | 482 | |
1a853e36 | 483 | if (!pid) { |
0e9b20b8 | 484 | if (execvp(argv[0], (char **)argv)) { |
1a853e36 ACM |
485 | perror(argv[0]); |
486 | exit(-1); | |
487 | } | |
de9ac07b PZ |
488 | } |
489 | } | |
490 | ||
491 | if (realtime_prio) { | |
492 | struct sched_param param; | |
493 | ||
494 | param.sched_priority = realtime_prio; | |
495 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { | |
496 | printf("Could not set realtime priority.\n"); | |
497 | exit(-1); | |
498 | } | |
499 | } | |
500 | ||
f70e87d7 | 501 | if (system_wide) |
2debbc83 | 502 | synthesize_samples(); |
de9ac07b PZ |
503 | |
504 | while (!done) { | |
2debbc83 | 505 | int hits = samples; |
de9ac07b | 506 | |
16c8a109 | 507 | for (i = 0; i < nr_cpu; i++) { |
de9ac07b PZ |
508 | for (counter = 0; counter < nr_counters; counter++) |
509 | mmap_read(&mmap_array[i][counter]); | |
510 | } | |
511 | ||
2debbc83 | 512 | if (hits == samples) |
de9ac07b PZ |
513 | ret = poll(event_array, nr_poll, 100); |
514 | } | |
515 | ||
021e9f47 IM |
516 | /* |
517 | * Approximate RIP event size: 24 bytes. | |
518 | */ | |
519 | fprintf(stderr, | |
2debbc83 | 520 | "[ perf record: Captured and wrote %.3f MB %s (~%lld samples) ]\n", |
021e9f47 IM |
521 | (double)bytes_written / 1024.0 / 1024.0, |
522 | output_name, | |
523 | bytes_written / 24); | |
addc2785 | 524 | |
de9ac07b PZ |
525 | return 0; |
526 | } | |
0e9b20b8 | 527 | |
0e9b20b8 | 528 | static const char * const record_usage[] = { |
9e096753 MG |
529 | "perf record [<options>] [<command>]", |
530 | "perf record [<options>] -- <command> [<options>]", | |
0e9b20b8 IM |
531 | NULL |
532 | }; | |
533 | ||
5242519b | 534 | static const struct option options[] = { |
0e9b20b8 | 535 | OPT_CALLBACK('e', "event", NULL, "event", |
86847b62 TG |
536 | "event selector. use 'perf list' to list available events", |
537 | parse_events), | |
0e9b20b8 IM |
538 | OPT_INTEGER('p', "pid", &target_pid, |
539 | "record events on existing pid"), | |
540 | OPT_INTEGER('r', "realtime", &realtime_prio, | |
541 | "collect data with this RT SCHED_FIFO priority"), | |
542 | OPT_BOOLEAN('a', "all-cpus", &system_wide, | |
543 | "system-wide collection from all CPUs"), | |
abaff32a IM |
544 | OPT_BOOLEAN('A', "append", &append_file, |
545 | "append to the output file to do incremental profiling"), | |
97124d5e PZ |
546 | OPT_BOOLEAN('f', "force", &force, |
547 | "overwrite existing data file"), | |
e61078a0 | 548 | OPT_LONG('c', "count", &default_interval, |
abaff32a IM |
549 | "event period to sample"), |
550 | OPT_STRING('o', "output", &output_name, "file", | |
551 | "output file name"), | |
552 | OPT_BOOLEAN('i', "inherit", &inherit, | |
553 | "child tasks inherit counters"), | |
cf1f4574 IM |
554 | OPT_INTEGER('F', "freq", &freq, |
555 | "profile at this frequency"), | |
abaff32a IM |
556 | OPT_INTEGER('m', "mmap-pages", &mmap_pages, |
557 | "number of mmap data pages"), | |
3da297a6 IM |
558 | OPT_BOOLEAN('v', "verbose", &verbose, |
559 | "be more verbose (show counter open errors, etc)"), | |
0e9b20b8 IM |
560 | OPT_END() |
561 | }; | |
562 | ||
563 | int cmd_record(int argc, const char **argv, const char *prefix) | |
564 | { | |
565 | int counter; | |
566 | ||
0e9b20b8 | 567 | argc = parse_options(argc, argv, options, record_usage, 0); |
ef65b2a0 | 568 | if (!argc && target_pid == -1 && !system_wide) |
0e9b20b8 IM |
569 | usage_with_options(record_usage, options); |
570 | ||
a21ca2ca | 571 | if (!nr_counters) |
0e9b20b8 | 572 | nr_counters = 1; |
0e9b20b8 IM |
573 | |
574 | for (counter = 0; counter < nr_counters; counter++) { | |
a21ca2ca | 575 | if (attrs[counter].sample_period) |
0e9b20b8 IM |
576 | continue; |
577 | ||
a21ca2ca | 578 | attrs[counter].sample_period = default_interval; |
0e9b20b8 IM |
579 | } |
580 | ||
581 | return __cmd_record(argc, argv); | |
582 | } |