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 | ||
9cffa8d5 | 47 | static u64 bytes_written; |
a21ca2ca IM |
48 | |
49 | static struct pollfd event_array[MAX_NR_CPUS * MAX_COUNTERS]; | |
50 | ||
51 | static int nr_poll; | |
52 | static int nr_cpu; | |
53 | ||
f5970550 PZ |
54 | static int file_new = 1; |
55 | static struct perf_file_header file_header; | |
56 | ||
a21ca2ca IM |
57 | struct mmap_event { |
58 | struct perf_event_header header; | |
9cffa8d5 PM |
59 | u32 pid; |
60 | u32 tid; | |
61 | u64 start; | |
62 | u64 len; | |
63 | u64 pgoff; | |
a21ca2ca IM |
64 | char filename[PATH_MAX]; |
65 | }; | |
66 | ||
67 | struct comm_event { | |
68 | struct perf_event_header header; | |
9cffa8d5 PM |
69 | u32 pid; |
70 | u32 tid; | |
a21ca2ca | 71 | char comm[16]; |
de9ac07b PZ |
72 | }; |
73 | ||
a21ca2ca | 74 | |
de9ac07b | 75 | struct mmap_data { |
a21ca2ca IM |
76 | int counter; |
77 | void *base; | |
78 | unsigned int mask; | |
79 | unsigned int prev; | |
de9ac07b PZ |
80 | }; |
81 | ||
a21ca2ca IM |
82 | static struct mmap_data mmap_array[MAX_NR_CPUS][MAX_COUNTERS]; |
83 | ||
9d91a6f7 | 84 | static unsigned long mmap_read_head(struct mmap_data *md) |
de9ac07b PZ |
85 | { |
86 | struct perf_counter_mmap_page *pc = md->base; | |
9d91a6f7 | 87 | long head; |
de9ac07b PZ |
88 | |
89 | head = pc->data_head; | |
90 | rmb(); | |
91 | ||
92 | return head; | |
93 | } | |
94 | ||
9d91a6f7 PZ |
95 | static void mmap_write_tail(struct mmap_data *md, unsigned long tail) |
96 | { | |
97 | struct perf_counter_mmap_page *pc = md->base; | |
98 | ||
99 | /* | |
100 | * ensure all reads are done before we write the tail out. | |
101 | */ | |
102 | /* mb(); */ | |
103 | pc->data_tail = tail; | |
104 | } | |
105 | ||
f5970550 PZ |
106 | static void write_output(void *buf, size_t size) |
107 | { | |
108 | while (size) { | |
109 | int ret = write(output, buf, size); | |
110 | ||
111 | if (ret < 0) | |
112 | die("failed to write"); | |
113 | ||
114 | size -= ret; | |
115 | buf += ret; | |
116 | ||
117 | bytes_written += ret; | |
118 | } | |
119 | } | |
120 | ||
de9ac07b PZ |
121 | static void mmap_read(struct mmap_data *md) |
122 | { | |
123 | unsigned int head = mmap_read_head(md); | |
124 | unsigned int old = md->prev; | |
125 | unsigned char *data = md->base + page_size; | |
126 | unsigned long size; | |
127 | void *buf; | |
128 | int diff; | |
129 | ||
130 | gettimeofday(&this_read, NULL); | |
131 | ||
132 | /* | |
133 | * If we're further behind than half the buffer, there's a chance | |
2debbc83 | 134 | * the writer will bite our tail and mess up the samples under us. |
de9ac07b PZ |
135 | * |
136 | * If we somehow ended up ahead of the head, we got messed up. | |
137 | * | |
138 | * In either case, truncate and restart at head. | |
139 | */ | |
140 | diff = head - old; | |
9d91a6f7 | 141 | if (diff < 0) { |
de9ac07b PZ |
142 | struct timeval iv; |
143 | unsigned long msecs; | |
144 | ||
145 | timersub(&this_read, &last_read, &iv); | |
146 | msecs = iv.tv_sec*1000 + iv.tv_usec/1000; | |
147 | ||
148 | fprintf(stderr, "WARNING: failed to keep up with mmap data." | |
149 | " Last read %lu msecs ago.\n", msecs); | |
150 | ||
151 | /* | |
152 | * head points to a known good entry, start there. | |
153 | */ | |
154 | old = head; | |
155 | } | |
156 | ||
157 | last_read = this_read; | |
158 | ||
159 | if (old != head) | |
2debbc83 | 160 | samples++; |
de9ac07b PZ |
161 | |
162 | size = head - old; | |
163 | ||
164 | if ((old & md->mask) + size != (head & md->mask)) { | |
165 | buf = &data[old & md->mask]; | |
166 | size = md->mask + 1 - (old & md->mask); | |
167 | old += size; | |
021e9f47 | 168 | |
f5970550 | 169 | write_output(buf, size); |
de9ac07b PZ |
170 | } |
171 | ||
172 | buf = &data[old & md->mask]; | |
173 | size = head - old; | |
174 | old += size; | |
021e9f47 | 175 | |
f5970550 | 176 | write_output(buf, size); |
de9ac07b PZ |
177 | |
178 | md->prev = old; | |
9d91a6f7 | 179 | mmap_write_tail(md, old); |
de9ac07b PZ |
180 | } |
181 | ||
182 | static volatile int done = 0; | |
f7b7c26e | 183 | static volatile int signr = -1; |
de9ac07b | 184 | |
16c8a109 | 185 | static void sig_handler(int sig) |
de9ac07b | 186 | { |
16c8a109 | 187 | done = 1; |
f7b7c26e PZ |
188 | signr = sig; |
189 | } | |
190 | ||
191 | static void sig_atexit(void) | |
192 | { | |
193 | if (signr == -1) | |
194 | return; | |
195 | ||
196 | signal(signr, SIG_DFL); | |
197 | kill(getpid(), signr); | |
de9ac07b PZ |
198 | } |
199 | ||
f70e87d7 | 200 | static void pid_synthesize_comm_event(pid_t pid, int full) |
1a853e36 | 201 | { |
16f762a2 | 202 | struct comm_event comm_ev; |
1a853e36 ACM |
203 | char filename[PATH_MAX]; |
204 | char bf[BUFSIZ]; | |
f5970550 | 205 | int fd; |
1a853e36 | 206 | size_t size; |
a0055ae2 | 207 | char *field, *sep; |
f70e87d7 PZ |
208 | DIR *tasks; |
209 | struct dirent dirent, *next; | |
1a853e36 ACM |
210 | |
211 | snprintf(filename, sizeof(filename), "/proc/%d/stat", pid); | |
212 | ||
213 | fd = open(filename, O_RDONLY); | |
214 | if (fd < 0) { | |
613d8602 IM |
215 | /* |
216 | * We raced with a task exiting - just return: | |
217 | */ | |
218 | if (verbose) | |
219 | fprintf(stderr, "couldn't open %s\n", filename); | |
220 | return; | |
1a853e36 ACM |
221 | } |
222 | if (read(fd, bf, sizeof(bf)) < 0) { | |
223 | fprintf(stderr, "couldn't read %s\n", filename); | |
224 | exit(EXIT_FAILURE); | |
225 | } | |
226 | close(fd); | |
227 | ||
a0055ae2 | 228 | /* 9027 (cat) R 6747 9027 6747 34816 9027 ... */ |
1a853e36 | 229 | memset(&comm_ev, 0, sizeof(comm_ev)); |
a0055ae2 ACM |
230 | field = strchr(bf, '('); |
231 | if (field == NULL) | |
232 | goto out_failure; | |
233 | sep = strchr(++field, ')'); | |
234 | if (sep == NULL) | |
235 | goto out_failure; | |
236 | size = sep - field; | |
237 | memcpy(comm_ev.comm, field, size++); | |
f70e87d7 PZ |
238 | |
239 | comm_ev.pid = pid; | |
1a853e36 | 240 | comm_ev.header.type = PERF_EVENT_COMM; |
9cffa8d5 | 241 | size = ALIGN(size, sizeof(u64)); |
1a853e36 | 242 | comm_ev.header.size = sizeof(comm_ev) - (sizeof(comm_ev.comm) - size); |
16f762a2 | 243 | |
f70e87d7 PZ |
244 | if (!full) { |
245 | comm_ev.tid = pid; | |
246 | ||
f5970550 | 247 | write_output(&comm_ev, comm_ev.header.size); |
f70e87d7 PZ |
248 | return; |
249 | } | |
250 | ||
251 | snprintf(filename, sizeof(filename), "/proc/%d/task", pid); | |
252 | ||
253 | tasks = opendir(filename); | |
254 | while (!readdir_r(tasks, &dirent, &next) && next) { | |
255 | char *end; | |
256 | pid = strtol(dirent.d_name, &end, 10); | |
257 | if (*end) | |
258 | continue; | |
259 | ||
260 | comm_ev.tid = pid; | |
261 | ||
f5970550 | 262 | write_output(&comm_ev, comm_ev.header.size); |
1a853e36 | 263 | } |
f70e87d7 PZ |
264 | closedir(tasks); |
265 | return; | |
266 | ||
a0055ae2 ACM |
267 | out_failure: |
268 | fprintf(stderr, "couldn't get COMM and pgid, malformed %s\n", | |
269 | filename); | |
270 | exit(EXIT_FAILURE); | |
1a853e36 ACM |
271 | } |
272 | ||
2debbc83 | 273 | static void pid_synthesize_mmap_samples(pid_t pid) |
1a853e36 ACM |
274 | { |
275 | char filename[PATH_MAX]; | |
276 | FILE *fp; | |
277 | ||
278 | snprintf(filename, sizeof(filename), "/proc/%d/maps", pid); | |
279 | ||
280 | fp = fopen(filename, "r"); | |
281 | if (fp == NULL) { | |
613d8602 IM |
282 | /* |
283 | * We raced with a task exiting - just return: | |
284 | */ | |
285 | if (verbose) | |
286 | fprintf(stderr, "couldn't open %s\n", filename); | |
287 | return; | |
1a853e36 ACM |
288 | } |
289 | while (1) { | |
a0055ae2 | 290 | char bf[BUFSIZ], *pbf = bf; |
1a853e36 ACM |
291 | struct mmap_event mmap_ev = { |
292 | .header.type = PERF_EVENT_MMAP, | |
293 | }; | |
a0055ae2 | 294 | int n; |
1a853e36 ACM |
295 | size_t size; |
296 | if (fgets(bf, sizeof(bf), fp) == NULL) | |
297 | break; | |
298 | ||
299 | /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */ | |
a0055ae2 ACM |
300 | n = hex2u64(pbf, &mmap_ev.start); |
301 | if (n < 0) | |
302 | continue; | |
303 | pbf += n + 1; | |
304 | n = hex2u64(pbf, &mmap_ev.len); | |
305 | if (n < 0) | |
306 | continue; | |
307 | pbf += n + 3; | |
308 | if (*pbf == 'x') { /* vm_exec */ | |
76c64c5e | 309 | char *execname = strchr(bf, '/'); |
1a853e36 | 310 | |
76c64c5e | 311 | if (execname == NULL) |
1a853e36 ACM |
312 | continue; |
313 | ||
1a853e36 ACM |
314 | size = strlen(execname); |
315 | execname[size - 1] = '\0'; /* Remove \n */ | |
316 | memcpy(mmap_ev.filename, execname, size); | |
9cffa8d5 | 317 | size = ALIGN(size, sizeof(u64)); |
1a853e36 ACM |
318 | mmap_ev.len -= mmap_ev.start; |
319 | mmap_ev.header.size = (sizeof(mmap_ev) - | |
320 | (sizeof(mmap_ev.filename) - size)); | |
f70e87d7 | 321 | mmap_ev.pid = pid; |
1a853e36 ACM |
322 | mmap_ev.tid = pid; |
323 | ||
f5970550 | 324 | write_output(&mmap_ev, mmap_ev.header.size); |
1a853e36 ACM |
325 | } |
326 | } | |
327 | ||
328 | fclose(fp); | |
329 | } | |
330 | ||
2debbc83 | 331 | static void synthesize_samples(void) |
f70e87d7 PZ |
332 | { |
333 | DIR *proc; | |
334 | struct dirent dirent, *next; | |
335 | ||
336 | proc = opendir("/proc"); | |
337 | ||
338 | while (!readdir_r(proc, &dirent, &next) && next) { | |
339 | char *end; | |
340 | pid_t pid; | |
341 | ||
342 | pid = strtol(dirent.d_name, &end, 10); | |
343 | if (*end) /* only interested in proper numerical dirents */ | |
344 | continue; | |
345 | ||
346 | pid_synthesize_comm_event(pid, 1); | |
2debbc83 | 347 | pid_synthesize_mmap_samples(pid); |
f70e87d7 PZ |
348 | } |
349 | ||
350 | closedir(proc); | |
351 | } | |
352 | ||
f250c030 IM |
353 | static int group_fd; |
354 | ||
355 | static void create_counter(int counter, int cpu, pid_t pid) | |
de9ac07b | 356 | { |
a21ca2ca | 357 | struct perf_counter_attr *attr = attrs + counter; |
16c8a109 | 358 | int track = 1; |
16c8a109 | 359 | |
ea1900e5 | 360 | attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID; |
3efa1cc9 | 361 | |
1dba15e7 | 362 | if (freq) { |
ea1900e5 | 363 | attr->sample_type |= PERF_SAMPLE_PERIOD; |
a21ca2ca IM |
364 | attr->freq = 1; |
365 | attr->sample_freq = freq; | |
1dba15e7 | 366 | } |
3efa1cc9 IM |
367 | |
368 | if (call_graph) | |
369 | attr->sample_type |= PERF_SAMPLE_CALLCHAIN; | |
370 | ||
f5970550 PZ |
371 | if (file_new) { |
372 | file_header.sample_type = attr->sample_type; | |
373 | } else { | |
374 | if (file_header.sample_type != attr->sample_type) { | |
375 | fprintf(stderr, "incompatible append\n"); | |
376 | exit(-1); | |
377 | } | |
378 | } | |
379 | ||
a21ca2ca IM |
380 | attr->mmap = track; |
381 | attr->comm = track; | |
382 | attr->inherit = (cpu < 0) && inherit; | |
4502d77c | 383 | attr->disabled = 1; |
16c8a109 | 384 | |
f250c030 | 385 | track = 0; /* only the first counter needs these */ |
16c8a109 | 386 | |
3da297a6 | 387 | try_again: |
a21ca2ca | 388 | fd[nr_cpu][counter] = sys_perf_counter_open(attr, pid, cpu, group_fd, 0); |
16c8a109 | 389 | |
f250c030 IM |
390 | if (fd[nr_cpu][counter] < 0) { |
391 | int err = errno; | |
16c8a109 | 392 | |
f250c030 | 393 | if (err == EPERM) |
3da297a6 IM |
394 | die("Permission error - are you root?\n"); |
395 | ||
396 | /* | |
397 | * If it's cycles then fall back to hrtimer | |
398 | * based cpu-clock-tick sw counter, which | |
399 | * is always available even if no PMU support: | |
400 | */ | |
401 | if (attr->type == PERF_TYPE_HARDWARE | |
f4dbfa8f | 402 | && attr->config == PERF_COUNT_HW_CPU_CYCLES) { |
3da297a6 IM |
403 | |
404 | if (verbose) | |
405 | warning(" ... trying to fall back to cpu-clock-ticks\n"); | |
406 | attr->type = PERF_TYPE_SOFTWARE; | |
f4dbfa8f | 407 | attr->config = PERF_COUNT_SW_CPU_CLOCK; |
3da297a6 IM |
408 | goto try_again; |
409 | } | |
30c806a0 IM |
410 | printf("\n"); |
411 | error("perfcounter syscall returned with %d (%s)\n", | |
412 | fd[nr_cpu][counter], strerror(err)); | |
413 | die("No CONFIG_PERF_COUNTERS=y kernel support configured?\n"); | |
f250c030 IM |
414 | exit(-1); |
415 | } | |
3da297a6 | 416 | |
f250c030 IM |
417 | assert(fd[nr_cpu][counter] >= 0); |
418 | fcntl(fd[nr_cpu][counter], F_SETFL, O_NONBLOCK); | |
16c8a109 | 419 | |
f250c030 IM |
420 | /* |
421 | * First counter acts as the group leader: | |
422 | */ | |
423 | if (group && group_fd == -1) | |
424 | group_fd = fd[nr_cpu][counter]; | |
425 | ||
426 | event_array[nr_poll].fd = fd[nr_cpu][counter]; | |
427 | event_array[nr_poll].events = POLLIN; | |
428 | nr_poll++; | |
429 | ||
430 | mmap_array[nr_cpu][counter].counter = counter; | |
431 | mmap_array[nr_cpu][counter].prev = 0; | |
432 | mmap_array[nr_cpu][counter].mask = mmap_pages*page_size - 1; | |
433 | mmap_array[nr_cpu][counter].base = mmap(NULL, (mmap_pages+1)*page_size, | |
9d91a6f7 | 434 | PROT_READ|PROT_WRITE, MAP_SHARED, fd[nr_cpu][counter], 0); |
f250c030 IM |
435 | if (mmap_array[nr_cpu][counter].base == MAP_FAILED) { |
436 | error("failed to mmap with %d (%s)\n", errno, strerror(errno)); | |
437 | exit(-1); | |
438 | } | |
4502d77c PZ |
439 | |
440 | ioctl(fd[nr_cpu][counter], PERF_COUNTER_IOC_ENABLE); | |
f250c030 | 441 | } |
f2521b6e | 442 | |
f250c030 IM |
443 | static void open_counters(int cpu, pid_t pid) |
444 | { | |
445 | int counter; | |
16c8a109 | 446 | |
f250c030 IM |
447 | if (pid > 0) { |
448 | pid_synthesize_comm_event(pid, 0); | |
2debbc83 | 449 | pid_synthesize_mmap_samples(pid); |
16c8a109 | 450 | } |
f250c030 IM |
451 | |
452 | group_fd = -1; | |
453 | for (counter = 0; counter < nr_counters; counter++) | |
454 | create_counter(counter, cpu, pid); | |
455 | ||
16c8a109 PZ |
456 | nr_cpu++; |
457 | } | |
458 | ||
f5970550 PZ |
459 | static void atexit_header(void) |
460 | { | |
461 | file_header.data_size += bytes_written; | |
462 | ||
eadc84cc FW |
463 | if (pwrite(output, &file_header, sizeof(file_header), 0) == -1) |
464 | perror("failed to write on file headers"); | |
f5970550 PZ |
465 | } |
466 | ||
0e9b20b8 | 467 | static int __cmd_record(int argc, const char **argv) |
16c8a109 PZ |
468 | { |
469 | int i, counter; | |
abaff32a | 470 | struct stat st; |
de9ac07b | 471 | pid_t pid; |
abaff32a | 472 | int flags; |
de9ac07b PZ |
473 | int ret; |
474 | ||
475 | page_size = sysconf(_SC_PAGE_SIZE); | |
de9ac07b PZ |
476 | nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
477 | assert(nr_cpus <= MAX_NR_CPUS); | |
478 | assert(nr_cpus >= 0); | |
479 | ||
f5970550 PZ |
480 | atexit(sig_atexit); |
481 | signal(SIGCHLD, sig_handler); | |
482 | signal(SIGINT, sig_handler); | |
483 | ||
abaff32a IM |
484 | if (!stat(output_name, &st) && !force && !append_file) { |
485 | fprintf(stderr, "Error, output file %s exists, use -A to append or -f to overwrite.\n", | |
97124d5e PZ |
486 | output_name); |
487 | exit(-1); | |
488 | } | |
489 | ||
abaff32a IM |
490 | flags = O_CREAT|O_RDWR; |
491 | if (append_file) | |
f5970550 | 492 | file_new = 0; |
abaff32a IM |
493 | else |
494 | flags |= O_TRUNC; | |
495 | ||
496 | output = open(output_name, flags, S_IRUSR|S_IWUSR); | |
de9ac07b PZ |
497 | if (output < 0) { |
498 | perror("failed to create output file"); | |
499 | exit(-1); | |
500 | } | |
501 | ||
f5970550 | 502 | if (!file_new) { |
eadc84cc FW |
503 | if (read(output, &file_header, sizeof(file_header)) == -1) { |
504 | perror("failed to read file headers"); | |
505 | exit(-1); | |
506 | } | |
507 | ||
f5970550 PZ |
508 | lseek(output, file_header.data_size, SEEK_CUR); |
509 | } | |
510 | ||
511 | atexit(atexit_header); | |
512 | ||
1a853e36 | 513 | if (!system_wide) { |
df97992c | 514 | open_counters(-1, target_pid != -1 ? target_pid : getpid()); |
1a853e36 ACM |
515 | } else for (i = 0; i < nr_cpus; i++) |
516 | open_counters(i, target_pid); | |
de9ac07b | 517 | |
ef65b2a0 | 518 | if (target_pid == -1 && argc) { |
1a853e36 ACM |
519 | pid = fork(); |
520 | if (pid < 0) | |
521 | perror("failed to fork"); | |
de9ac07b | 522 | |
1a853e36 | 523 | if (!pid) { |
0e9b20b8 | 524 | if (execvp(argv[0], (char **)argv)) { |
1a853e36 ACM |
525 | perror(argv[0]); |
526 | exit(-1); | |
527 | } | |
de9ac07b PZ |
528 | } |
529 | } | |
530 | ||
531 | if (realtime_prio) { | |
532 | struct sched_param param; | |
533 | ||
534 | param.sched_priority = realtime_prio; | |
535 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { | |
536 | printf("Could not set realtime priority.\n"); | |
537 | exit(-1); | |
538 | } | |
539 | } | |
540 | ||
f70e87d7 | 541 | if (system_wide) |
2debbc83 | 542 | synthesize_samples(); |
de9ac07b PZ |
543 | |
544 | while (!done) { | |
2debbc83 | 545 | int hits = samples; |
de9ac07b | 546 | |
16c8a109 | 547 | for (i = 0; i < nr_cpu; i++) { |
de9ac07b PZ |
548 | for (counter = 0; counter < nr_counters; counter++) |
549 | mmap_read(&mmap_array[i][counter]); | |
550 | } | |
551 | ||
2debbc83 | 552 | if (hits == samples) |
de9ac07b PZ |
553 | ret = poll(event_array, nr_poll, 100); |
554 | } | |
555 | ||
021e9f47 IM |
556 | /* |
557 | * Approximate RIP event size: 24 bytes. | |
558 | */ | |
559 | fprintf(stderr, | |
2debbc83 | 560 | "[ perf record: Captured and wrote %.3f MB %s (~%lld samples) ]\n", |
021e9f47 IM |
561 | (double)bytes_written / 1024.0 / 1024.0, |
562 | output_name, | |
563 | bytes_written / 24); | |
addc2785 | 564 | |
de9ac07b PZ |
565 | return 0; |
566 | } | |
0e9b20b8 | 567 | |
0e9b20b8 | 568 | static const char * const record_usage[] = { |
9e096753 MG |
569 | "perf record [<options>] [<command>]", |
570 | "perf record [<options>] -- <command> [<options>]", | |
0e9b20b8 IM |
571 | NULL |
572 | }; | |
573 | ||
5242519b | 574 | static const struct option options[] = { |
0e9b20b8 | 575 | OPT_CALLBACK('e', "event", NULL, "event", |
86847b62 TG |
576 | "event selector. use 'perf list' to list available events", |
577 | parse_events), | |
0e9b20b8 IM |
578 | OPT_INTEGER('p', "pid", &target_pid, |
579 | "record events on existing pid"), | |
580 | OPT_INTEGER('r', "realtime", &realtime_prio, | |
581 | "collect data with this RT SCHED_FIFO priority"), | |
582 | OPT_BOOLEAN('a', "all-cpus", &system_wide, | |
583 | "system-wide collection from all CPUs"), | |
abaff32a IM |
584 | OPT_BOOLEAN('A', "append", &append_file, |
585 | "append to the output file to do incremental profiling"), | |
97124d5e PZ |
586 | OPT_BOOLEAN('f', "force", &force, |
587 | "overwrite existing data file"), | |
e61078a0 | 588 | OPT_LONG('c', "count", &default_interval, |
abaff32a IM |
589 | "event period to sample"), |
590 | OPT_STRING('o', "output", &output_name, "file", | |
591 | "output file name"), | |
592 | OPT_BOOLEAN('i', "inherit", &inherit, | |
593 | "child tasks inherit counters"), | |
cf1f4574 IM |
594 | OPT_INTEGER('F', "freq", &freq, |
595 | "profile at this frequency"), | |
abaff32a IM |
596 | OPT_INTEGER('m', "mmap-pages", &mmap_pages, |
597 | "number of mmap data pages"), | |
3efa1cc9 IM |
598 | OPT_BOOLEAN('g', "call-graph", &call_graph, |
599 | "do call-graph (stack chain/backtrace) recording"), | |
3da297a6 IM |
600 | OPT_BOOLEAN('v', "verbose", &verbose, |
601 | "be more verbose (show counter open errors, etc)"), | |
0e9b20b8 IM |
602 | OPT_END() |
603 | }; | |
604 | ||
605 | int cmd_record(int argc, const char **argv, const char *prefix) | |
606 | { | |
607 | int counter; | |
608 | ||
0e9b20b8 | 609 | argc = parse_options(argc, argv, options, record_usage, 0); |
ef65b2a0 | 610 | if (!argc && target_pid == -1 && !system_wide) |
0e9b20b8 IM |
611 | usage_with_options(record_usage, options); |
612 | ||
bbd36e5e PZ |
613 | if (!nr_counters) { |
614 | nr_counters = 1; | |
615 | attrs[0].type = PERF_TYPE_HARDWARE; | |
616 | attrs[0].config = PERF_COUNT_HW_CPU_CYCLES; | |
617 | } | |
0e9b20b8 IM |
618 | |
619 | for (counter = 0; counter < nr_counters; counter++) { | |
a21ca2ca | 620 | if (attrs[counter].sample_period) |
0e9b20b8 IM |
621 | continue; |
622 | ||
a21ca2ca | 623 | attrs[counter].sample_period = default_interval; |
0e9b20b8 IM |
624 | } |
625 | ||
626 | return __cmd_record(argc, argv); | |
627 | } |