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; |
3efa1cc9 | 40 | static int call_graph = 0; |
3da297a6 | 41 | static int verbose = 0; |
de9ac07b | 42 | |
a21ca2ca IM |
43 | static long samples; |
44 | static struct timeval last_read; | |
45 | static struct timeval this_read; | |
46 | ||
47 | static __u64 bytes_written; | |
48 | ||
49 | static struct pollfd event_array[MAX_NR_CPUS * MAX_COUNTERS]; | |
50 | ||
51 | static int nr_poll; | |
52 | static int nr_cpu; | |
53 | ||
54 | struct mmap_event { | |
55 | struct perf_event_header header; | |
56 | __u32 pid; | |
57 | __u32 tid; | |
58 | __u64 start; | |
59 | __u64 len; | |
60 | __u64 pgoff; | |
61 | char filename[PATH_MAX]; | |
62 | }; | |
63 | ||
64 | struct comm_event { | |
65 | struct perf_event_header header; | |
66 | __u32 pid; | |
67 | __u32 tid; | |
68 | char comm[16]; | |
de9ac07b PZ |
69 | }; |
70 | ||
a21ca2ca | 71 | |
de9ac07b | 72 | struct mmap_data { |
a21ca2ca IM |
73 | int counter; |
74 | void *base; | |
75 | unsigned int mask; | |
76 | unsigned int prev; | |
de9ac07b PZ |
77 | }; |
78 | ||
a21ca2ca IM |
79 | static struct mmap_data mmap_array[MAX_NR_CPUS][MAX_COUNTERS]; |
80 | ||
9d91a6f7 | 81 | static unsigned long mmap_read_head(struct mmap_data *md) |
de9ac07b PZ |
82 | { |
83 | struct perf_counter_mmap_page *pc = md->base; | |
9d91a6f7 | 84 | long head; |
de9ac07b PZ |
85 | |
86 | head = pc->data_head; | |
87 | rmb(); | |
88 | ||
89 | return head; | |
90 | } | |
91 | ||
9d91a6f7 PZ |
92 | static void mmap_write_tail(struct mmap_data *md, unsigned long tail) |
93 | { | |
94 | struct perf_counter_mmap_page *pc = md->base; | |
95 | ||
96 | /* | |
97 | * ensure all reads are done before we write the tail out. | |
98 | */ | |
99 | /* mb(); */ | |
100 | pc->data_tail = tail; | |
101 | } | |
102 | ||
de9ac07b PZ |
103 | static void mmap_read(struct mmap_data *md) |
104 | { | |
105 | unsigned int head = mmap_read_head(md); | |
106 | unsigned int old = md->prev; | |
107 | unsigned char *data = md->base + page_size; | |
108 | unsigned long size; | |
109 | void *buf; | |
110 | int diff; | |
111 | ||
112 | gettimeofday(&this_read, NULL); | |
113 | ||
114 | /* | |
115 | * If we're further behind than half the buffer, there's a chance | |
2debbc83 | 116 | * the writer will bite our tail and mess up the samples under us. |
de9ac07b PZ |
117 | * |
118 | * If we somehow ended up ahead of the head, we got messed up. | |
119 | * | |
120 | * In either case, truncate and restart at head. | |
121 | */ | |
122 | diff = head - old; | |
9d91a6f7 | 123 | if (diff < 0) { |
de9ac07b PZ |
124 | struct timeval iv; |
125 | unsigned long msecs; | |
126 | ||
127 | timersub(&this_read, &last_read, &iv); | |
128 | msecs = iv.tv_sec*1000 + iv.tv_usec/1000; | |
129 | ||
130 | fprintf(stderr, "WARNING: failed to keep up with mmap data." | |
131 | " Last read %lu msecs ago.\n", msecs); | |
132 | ||
133 | /* | |
134 | * head points to a known good entry, start there. | |
135 | */ | |
136 | old = head; | |
137 | } | |
138 | ||
139 | last_read = this_read; | |
140 | ||
141 | if (old != head) | |
2debbc83 | 142 | samples++; |
de9ac07b PZ |
143 | |
144 | size = head - old; | |
145 | ||
146 | if ((old & md->mask) + size != (head & md->mask)) { | |
147 | buf = &data[old & md->mask]; | |
148 | size = md->mask + 1 - (old & md->mask); | |
149 | old += size; | |
021e9f47 | 150 | |
de9ac07b PZ |
151 | while (size) { |
152 | int ret = write(output, buf, size); | |
021e9f47 IM |
153 | |
154 | if (ret < 0) | |
155 | die("failed to write"); | |
156 | ||
de9ac07b PZ |
157 | size -= ret; |
158 | buf += ret; | |
021e9f47 IM |
159 | |
160 | bytes_written += ret; | |
de9ac07b PZ |
161 | } |
162 | } | |
163 | ||
164 | buf = &data[old & md->mask]; | |
165 | size = head - old; | |
166 | old += size; | |
021e9f47 | 167 | |
de9ac07b PZ |
168 | while (size) { |
169 | int ret = write(output, buf, size); | |
021e9f47 IM |
170 | |
171 | if (ret < 0) | |
172 | die("failed to write"); | |
173 | ||
de9ac07b PZ |
174 | size -= ret; |
175 | buf += ret; | |
021e9f47 IM |
176 | |
177 | bytes_written += ret; | |
de9ac07b PZ |
178 | } |
179 | ||
180 | md->prev = old; | |
9d91a6f7 | 181 | mmap_write_tail(md, old); |
de9ac07b PZ |
182 | } |
183 | ||
184 | static volatile int done = 0; | |
f7b7c26e | 185 | static volatile int signr = -1; |
de9ac07b | 186 | |
16c8a109 | 187 | static void sig_handler(int sig) |
de9ac07b | 188 | { |
16c8a109 | 189 | done = 1; |
f7b7c26e PZ |
190 | signr = sig; |
191 | } | |
192 | ||
193 | static void sig_atexit(void) | |
194 | { | |
195 | if (signr == -1) | |
196 | return; | |
197 | ||
198 | signal(signr, SIG_DFL); | |
199 | kill(getpid(), signr); | |
de9ac07b PZ |
200 | } |
201 | ||
f70e87d7 | 202 | static void pid_synthesize_comm_event(pid_t pid, int full) |
1a853e36 | 203 | { |
16f762a2 | 204 | struct comm_event comm_ev; |
1a853e36 ACM |
205 | char filename[PATH_MAX]; |
206 | char bf[BUFSIZ]; | |
a0055ae2 | 207 | int fd, ret; |
1a853e36 | 208 | size_t size; |
a0055ae2 | 209 | char *field, *sep; |
f70e87d7 PZ |
210 | DIR *tasks; |
211 | struct dirent dirent, *next; | |
1a853e36 ACM |
212 | |
213 | snprintf(filename, sizeof(filename), "/proc/%d/stat", pid); | |
214 | ||
215 | fd = open(filename, O_RDONLY); | |
216 | if (fd < 0) { | |
613d8602 IM |
217 | /* |
218 | * We raced with a task exiting - just return: | |
219 | */ | |
220 | if (verbose) | |
221 | fprintf(stderr, "couldn't open %s\n", filename); | |
222 | return; | |
1a853e36 ACM |
223 | } |
224 | if (read(fd, bf, sizeof(bf)) < 0) { | |
225 | fprintf(stderr, "couldn't read %s\n", filename); | |
226 | exit(EXIT_FAILURE); | |
227 | } | |
228 | close(fd); | |
229 | ||
a0055ae2 | 230 | /* 9027 (cat) R 6747 9027 6747 34816 9027 ... */ |
1a853e36 | 231 | memset(&comm_ev, 0, sizeof(comm_ev)); |
a0055ae2 ACM |
232 | field = strchr(bf, '('); |
233 | if (field == NULL) | |
234 | goto out_failure; | |
235 | sep = strchr(++field, ')'); | |
236 | if (sep == NULL) | |
237 | goto out_failure; | |
238 | size = sep - field; | |
239 | memcpy(comm_ev.comm, field, size++); | |
f70e87d7 PZ |
240 | |
241 | comm_ev.pid = pid; | |
1a853e36 | 242 | comm_ev.header.type = PERF_EVENT_COMM; |
729ff5e2 | 243 | size = ALIGN(size, sizeof(__u64)); |
1a853e36 | 244 | comm_ev.header.size = sizeof(comm_ev) - (sizeof(comm_ev.comm) - size); |
16f762a2 | 245 | |
f70e87d7 PZ |
246 | if (!full) { |
247 | comm_ev.tid = pid; | |
248 | ||
249 | ret = write(output, &comm_ev, comm_ev.header.size); | |
250 | if (ret < 0) { | |
251 | perror("failed to write"); | |
252 | exit(-1); | |
253 | } | |
254 | return; | |
255 | } | |
256 | ||
257 | snprintf(filename, sizeof(filename), "/proc/%d/task", pid); | |
258 | ||
259 | tasks = opendir(filename); | |
260 | while (!readdir_r(tasks, &dirent, &next) && next) { | |
261 | char *end; | |
262 | pid = strtol(dirent.d_name, &end, 10); | |
263 | if (*end) | |
264 | continue; | |
265 | ||
266 | comm_ev.tid = pid; | |
267 | ||
268 | ret = write(output, &comm_ev, comm_ev.header.size); | |
269 | if (ret < 0) { | |
270 | perror("failed to write"); | |
271 | exit(-1); | |
272 | } | |
1a853e36 | 273 | } |
f70e87d7 PZ |
274 | closedir(tasks); |
275 | return; | |
276 | ||
a0055ae2 ACM |
277 | out_failure: |
278 | fprintf(stderr, "couldn't get COMM and pgid, malformed %s\n", | |
279 | filename); | |
280 | exit(EXIT_FAILURE); | |
1a853e36 ACM |
281 | } |
282 | ||
2debbc83 | 283 | static void pid_synthesize_mmap_samples(pid_t pid) |
1a853e36 ACM |
284 | { |
285 | char filename[PATH_MAX]; | |
286 | FILE *fp; | |
287 | ||
288 | snprintf(filename, sizeof(filename), "/proc/%d/maps", pid); | |
289 | ||
290 | fp = fopen(filename, "r"); | |
291 | if (fp == NULL) { | |
613d8602 IM |
292 | /* |
293 | * We raced with a task exiting - just return: | |
294 | */ | |
295 | if (verbose) | |
296 | fprintf(stderr, "couldn't open %s\n", filename); | |
297 | return; | |
1a853e36 ACM |
298 | } |
299 | while (1) { | |
a0055ae2 | 300 | char bf[BUFSIZ], *pbf = bf; |
1a853e36 ACM |
301 | struct mmap_event mmap_ev = { |
302 | .header.type = PERF_EVENT_MMAP, | |
303 | }; | |
a0055ae2 | 304 | int n; |
1a853e36 ACM |
305 | size_t size; |
306 | if (fgets(bf, sizeof(bf), fp) == NULL) | |
307 | break; | |
308 | ||
309 | /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */ | |
a0055ae2 ACM |
310 | n = hex2u64(pbf, &mmap_ev.start); |
311 | if (n < 0) | |
312 | continue; | |
313 | pbf += n + 1; | |
314 | n = hex2u64(pbf, &mmap_ev.len); | |
315 | if (n < 0) | |
316 | continue; | |
317 | pbf += n + 3; | |
318 | if (*pbf == 'x') { /* vm_exec */ | |
1a853e36 ACM |
319 | char *execname = strrchr(bf, ' '); |
320 | ||
321 | if (execname == NULL || execname[1] != '/') | |
322 | continue; | |
323 | ||
324 | execname += 1; | |
325 | size = strlen(execname); | |
326 | execname[size - 1] = '\0'; /* Remove \n */ | |
327 | memcpy(mmap_ev.filename, execname, size); | |
729ff5e2 | 328 | size = ALIGN(size, sizeof(__u64)); |
1a853e36 ACM |
329 | mmap_ev.len -= mmap_ev.start; |
330 | mmap_ev.header.size = (sizeof(mmap_ev) - | |
331 | (sizeof(mmap_ev.filename) - size)); | |
f70e87d7 | 332 | mmap_ev.pid = pid; |
1a853e36 ACM |
333 | mmap_ev.tid = pid; |
334 | ||
335 | if (write(output, &mmap_ev, mmap_ev.header.size) < 0) { | |
336 | perror("failed to write"); | |
337 | exit(-1); | |
338 | } | |
339 | } | |
340 | } | |
341 | ||
342 | fclose(fp); | |
343 | } | |
344 | ||
2debbc83 | 345 | static void synthesize_samples(void) |
f70e87d7 PZ |
346 | { |
347 | DIR *proc; | |
348 | struct dirent dirent, *next; | |
349 | ||
350 | proc = opendir("/proc"); | |
351 | ||
352 | while (!readdir_r(proc, &dirent, &next) && next) { | |
353 | char *end; | |
354 | pid_t pid; | |
355 | ||
356 | pid = strtol(dirent.d_name, &end, 10); | |
357 | if (*end) /* only interested in proper numerical dirents */ | |
358 | continue; | |
359 | ||
360 | pid_synthesize_comm_event(pid, 1); | |
2debbc83 | 361 | pid_synthesize_mmap_samples(pid); |
f70e87d7 PZ |
362 | } |
363 | ||
364 | closedir(proc); | |
365 | } | |
366 | ||
f250c030 IM |
367 | static int group_fd; |
368 | ||
369 | static void create_counter(int counter, int cpu, pid_t pid) | |
de9ac07b | 370 | { |
a21ca2ca | 371 | struct perf_counter_attr *attr = attrs + counter; |
16c8a109 | 372 | int track = 1; |
16c8a109 | 373 | |
ea1900e5 | 374 | attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID; |
3efa1cc9 | 375 | |
1dba15e7 | 376 | if (freq) { |
ea1900e5 | 377 | attr->sample_type |= PERF_SAMPLE_PERIOD; |
a21ca2ca IM |
378 | attr->freq = 1; |
379 | attr->sample_freq = freq; | |
1dba15e7 | 380 | } |
3efa1cc9 IM |
381 | |
382 | if (call_graph) | |
383 | attr->sample_type |= PERF_SAMPLE_CALLCHAIN; | |
384 | ||
a21ca2ca IM |
385 | attr->mmap = track; |
386 | attr->comm = track; | |
387 | attr->inherit = (cpu < 0) && inherit; | |
4502d77c | 388 | attr->disabled = 1; |
16c8a109 | 389 | |
f250c030 | 390 | track = 0; /* only the first counter needs these */ |
16c8a109 | 391 | |
3da297a6 | 392 | try_again: |
a21ca2ca | 393 | fd[nr_cpu][counter] = sys_perf_counter_open(attr, pid, cpu, group_fd, 0); |
16c8a109 | 394 | |
f250c030 IM |
395 | if (fd[nr_cpu][counter] < 0) { |
396 | int err = errno; | |
16c8a109 | 397 | |
f250c030 | 398 | if (err == EPERM) |
3da297a6 IM |
399 | die("Permission error - are you root?\n"); |
400 | ||
401 | /* | |
402 | * If it's cycles then fall back to hrtimer | |
403 | * based cpu-clock-tick sw counter, which | |
404 | * is always available even if no PMU support: | |
405 | */ | |
406 | if (attr->type == PERF_TYPE_HARDWARE | |
f4dbfa8f | 407 | && attr->config == PERF_COUNT_HW_CPU_CYCLES) { |
3da297a6 IM |
408 | |
409 | if (verbose) | |
410 | warning(" ... trying to fall back to cpu-clock-ticks\n"); | |
411 | attr->type = PERF_TYPE_SOFTWARE; | |
f4dbfa8f | 412 | attr->config = PERF_COUNT_SW_CPU_CLOCK; |
3da297a6 IM |
413 | goto try_again; |
414 | } | |
30c806a0 IM |
415 | printf("\n"); |
416 | error("perfcounter syscall returned with %d (%s)\n", | |
417 | fd[nr_cpu][counter], strerror(err)); | |
418 | die("No CONFIG_PERF_COUNTERS=y kernel support configured?\n"); | |
f250c030 IM |
419 | exit(-1); |
420 | } | |
3da297a6 | 421 | |
f250c030 IM |
422 | assert(fd[nr_cpu][counter] >= 0); |
423 | fcntl(fd[nr_cpu][counter], F_SETFL, O_NONBLOCK); | |
16c8a109 | 424 | |
f250c030 IM |
425 | /* |
426 | * First counter acts as the group leader: | |
427 | */ | |
428 | if (group && group_fd == -1) | |
429 | group_fd = fd[nr_cpu][counter]; | |
430 | ||
431 | event_array[nr_poll].fd = fd[nr_cpu][counter]; | |
432 | event_array[nr_poll].events = POLLIN; | |
433 | nr_poll++; | |
434 | ||
435 | mmap_array[nr_cpu][counter].counter = counter; | |
436 | mmap_array[nr_cpu][counter].prev = 0; | |
437 | mmap_array[nr_cpu][counter].mask = mmap_pages*page_size - 1; | |
438 | mmap_array[nr_cpu][counter].base = mmap(NULL, (mmap_pages+1)*page_size, | |
9d91a6f7 | 439 | PROT_READ|PROT_WRITE, MAP_SHARED, fd[nr_cpu][counter], 0); |
f250c030 IM |
440 | if (mmap_array[nr_cpu][counter].base == MAP_FAILED) { |
441 | error("failed to mmap with %d (%s)\n", errno, strerror(errno)); | |
442 | exit(-1); | |
443 | } | |
4502d77c PZ |
444 | |
445 | ioctl(fd[nr_cpu][counter], PERF_COUNTER_IOC_ENABLE); | |
f250c030 | 446 | } |
f2521b6e | 447 | |
f250c030 IM |
448 | static void open_counters(int cpu, pid_t pid) |
449 | { | |
450 | int counter; | |
16c8a109 | 451 | |
f250c030 IM |
452 | if (pid > 0) { |
453 | pid_synthesize_comm_event(pid, 0); | |
2debbc83 | 454 | pid_synthesize_mmap_samples(pid); |
16c8a109 | 455 | } |
f250c030 IM |
456 | |
457 | group_fd = -1; | |
458 | for (counter = 0; counter < nr_counters; counter++) | |
459 | create_counter(counter, cpu, pid); | |
460 | ||
16c8a109 PZ |
461 | nr_cpu++; |
462 | } | |
463 | ||
0e9b20b8 | 464 | static int __cmd_record(int argc, const char **argv) |
16c8a109 PZ |
465 | { |
466 | int i, counter; | |
abaff32a | 467 | struct stat st; |
de9ac07b | 468 | pid_t pid; |
abaff32a | 469 | int flags; |
de9ac07b PZ |
470 | int ret; |
471 | ||
472 | page_size = sysconf(_SC_PAGE_SIZE); | |
de9ac07b PZ |
473 | nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
474 | assert(nr_cpus <= MAX_NR_CPUS); | |
475 | assert(nr_cpus >= 0); | |
476 | ||
abaff32a IM |
477 | if (!stat(output_name, &st) && !force && !append_file) { |
478 | fprintf(stderr, "Error, output file %s exists, use -A to append or -f to overwrite.\n", | |
97124d5e PZ |
479 | output_name); |
480 | exit(-1); | |
481 | } | |
482 | ||
abaff32a IM |
483 | flags = O_CREAT|O_RDWR; |
484 | if (append_file) | |
485 | flags |= O_APPEND; | |
486 | else | |
487 | flags |= O_TRUNC; | |
488 | ||
489 | output = open(output_name, flags, S_IRUSR|S_IWUSR); | |
de9ac07b PZ |
490 | if (output < 0) { |
491 | perror("failed to create output file"); | |
492 | exit(-1); | |
493 | } | |
494 | ||
1a853e36 | 495 | if (!system_wide) { |
df97992c | 496 | open_counters(-1, target_pid != -1 ? target_pid : getpid()); |
1a853e36 ACM |
497 | } else for (i = 0; i < nr_cpus; i++) |
498 | open_counters(i, target_pid); | |
de9ac07b | 499 | |
f7b7c26e | 500 | atexit(sig_atexit); |
16c8a109 PZ |
501 | signal(SIGCHLD, sig_handler); |
502 | signal(SIGINT, sig_handler); | |
de9ac07b | 503 | |
ef65b2a0 | 504 | if (target_pid == -1 && argc) { |
1a853e36 ACM |
505 | pid = fork(); |
506 | if (pid < 0) | |
507 | perror("failed to fork"); | |
de9ac07b | 508 | |
1a853e36 | 509 | if (!pid) { |
0e9b20b8 | 510 | if (execvp(argv[0], (char **)argv)) { |
1a853e36 ACM |
511 | perror(argv[0]); |
512 | exit(-1); | |
513 | } | |
de9ac07b PZ |
514 | } |
515 | } | |
516 | ||
517 | if (realtime_prio) { | |
518 | struct sched_param param; | |
519 | ||
520 | param.sched_priority = realtime_prio; | |
521 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { | |
522 | printf("Could not set realtime priority.\n"); | |
523 | exit(-1); | |
524 | } | |
525 | } | |
526 | ||
f70e87d7 | 527 | if (system_wide) |
2debbc83 | 528 | synthesize_samples(); |
de9ac07b PZ |
529 | |
530 | while (!done) { | |
2debbc83 | 531 | int hits = samples; |
de9ac07b | 532 | |
16c8a109 | 533 | for (i = 0; i < nr_cpu; i++) { |
de9ac07b PZ |
534 | for (counter = 0; counter < nr_counters; counter++) |
535 | mmap_read(&mmap_array[i][counter]); | |
536 | } | |
537 | ||
2debbc83 | 538 | if (hits == samples) |
de9ac07b PZ |
539 | ret = poll(event_array, nr_poll, 100); |
540 | } | |
541 | ||
021e9f47 IM |
542 | /* |
543 | * Approximate RIP event size: 24 bytes. | |
544 | */ | |
545 | fprintf(stderr, | |
2debbc83 | 546 | "[ perf record: Captured and wrote %.3f MB %s (~%lld samples) ]\n", |
021e9f47 IM |
547 | (double)bytes_written / 1024.0 / 1024.0, |
548 | output_name, | |
549 | bytes_written / 24); | |
addc2785 | 550 | |
de9ac07b PZ |
551 | return 0; |
552 | } | |
0e9b20b8 | 553 | |
0e9b20b8 | 554 | static const char * const record_usage[] = { |
9e096753 MG |
555 | "perf record [<options>] [<command>]", |
556 | "perf record [<options>] -- <command> [<options>]", | |
0e9b20b8 IM |
557 | NULL |
558 | }; | |
559 | ||
5242519b | 560 | static const struct option options[] = { |
0e9b20b8 | 561 | OPT_CALLBACK('e', "event", NULL, "event", |
86847b62 TG |
562 | "event selector. use 'perf list' to list available events", |
563 | parse_events), | |
0e9b20b8 IM |
564 | OPT_INTEGER('p', "pid", &target_pid, |
565 | "record events on existing pid"), | |
566 | OPT_INTEGER('r', "realtime", &realtime_prio, | |
567 | "collect data with this RT SCHED_FIFO priority"), | |
568 | OPT_BOOLEAN('a', "all-cpus", &system_wide, | |
569 | "system-wide collection from all CPUs"), | |
abaff32a IM |
570 | OPT_BOOLEAN('A', "append", &append_file, |
571 | "append to the output file to do incremental profiling"), | |
97124d5e PZ |
572 | OPT_BOOLEAN('f', "force", &force, |
573 | "overwrite existing data file"), | |
e61078a0 | 574 | OPT_LONG('c', "count", &default_interval, |
abaff32a IM |
575 | "event period to sample"), |
576 | OPT_STRING('o', "output", &output_name, "file", | |
577 | "output file name"), | |
578 | OPT_BOOLEAN('i', "inherit", &inherit, | |
579 | "child tasks inherit counters"), | |
cf1f4574 IM |
580 | OPT_INTEGER('F', "freq", &freq, |
581 | "profile at this frequency"), | |
abaff32a IM |
582 | OPT_INTEGER('m', "mmap-pages", &mmap_pages, |
583 | "number of mmap data pages"), | |
3efa1cc9 IM |
584 | OPT_BOOLEAN('g', "call-graph", &call_graph, |
585 | "do call-graph (stack chain/backtrace) recording"), | |
3da297a6 IM |
586 | OPT_BOOLEAN('v', "verbose", &verbose, |
587 | "be more verbose (show counter open errors, etc)"), | |
0e9b20b8 IM |
588 | OPT_END() |
589 | }; | |
590 | ||
591 | int cmd_record(int argc, const char **argv, const char *prefix) | |
592 | { | |
593 | int counter; | |
594 | ||
0e9b20b8 | 595 | argc = parse_options(argc, argv, options, record_usage, 0); |
ef65b2a0 | 596 | if (!argc && target_pid == -1 && !system_wide) |
0e9b20b8 IM |
597 | usage_with_options(record_usage, options); |
598 | ||
bbd36e5e PZ |
599 | if (!nr_counters) { |
600 | nr_counters = 1; | |
601 | attrs[0].type = PERF_TYPE_HARDWARE; | |
602 | attrs[0].config = PERF_COUNT_HW_CPU_CYCLES; | |
603 | } | |
0e9b20b8 IM |
604 | |
605 | for (counter = 0; counter < nr_counters; counter++) { | |
a21ca2ca | 606 | if (attrs[counter].sample_period) |
0e9b20b8 IM |
607 | continue; |
608 | ||
a21ca2ca | 609 | attrs[counter].sample_period = default_interval; |
0e9b20b8 IM |
610 | } |
611 | ||
612 | return __cmd_record(argc, argv); | |
613 | } |