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 PZ |
17 | #include "util/header.h" |
18 | ||
97124d5e | 19 | #include <unistd.h> |
de9ac07b | 20 | #include <sched.h> |
de9ac07b | 21 | |
0e9b20b8 IM |
22 | #define ALIGN(x, a) __ALIGN_MASK(x, (typeof(x))(a)-1) |
23 | #define __ALIGN_MASK(x, mask) (((x)+(mask))&~(mask)) | |
1a853e36 | 24 | |
de9ac07b | 25 | static int fd[MAX_NR_CPUS][MAX_COUNTERS]; |
a21ca2ca IM |
26 | |
27 | static long default_interval = 100000; | |
28 | ||
3cf165fc | 29 | static int nr_cpus = 0; |
de9ac07b | 30 | static unsigned int page_size; |
3cf165fc | 31 | static unsigned int mmap_pages = 128; |
cf1f4574 | 32 | static int freq = 0; |
de9ac07b | 33 | static int output; |
23ac9cbe | 34 | static const char *output_name = "perf.data"; |
de9ac07b | 35 | static int group = 0; |
16c8a109 PZ |
36 | static unsigned int realtime_prio = 0; |
37 | static int system_wide = 0; | |
1a853e36 | 38 | static pid_t target_pid = -1; |
16c8a109 | 39 | static int inherit = 1; |
97124d5e | 40 | static int force = 0; |
abaff32a | 41 | static int append_file = 0; |
3efa1cc9 | 42 | static int call_graph = 0; |
3da297a6 | 43 | static int verbose = 0; |
de9ac07b | 44 | |
a21ca2ca IM |
45 | static long samples; |
46 | static struct timeval last_read; | |
47 | static struct timeval this_read; | |
48 | ||
9cffa8d5 | 49 | static u64 bytes_written; |
a21ca2ca IM |
50 | |
51 | static struct pollfd event_array[MAX_NR_CPUS * MAX_COUNTERS]; | |
52 | ||
53 | static int nr_poll; | |
54 | static int nr_cpu; | |
55 | ||
f5970550 | 56 | static int file_new = 1; |
7c6a1c65 PZ |
57 | |
58 | struct perf_header *header; | |
f5970550 | 59 | |
a21ca2ca IM |
60 | struct mmap_event { |
61 | struct perf_event_header header; | |
9cffa8d5 PM |
62 | u32 pid; |
63 | u32 tid; | |
64 | u64 start; | |
65 | u64 len; | |
66 | u64 pgoff; | |
a21ca2ca IM |
67 | char filename[PATH_MAX]; |
68 | }; | |
69 | ||
70 | struct comm_event { | |
71 | struct perf_event_header header; | |
9cffa8d5 PM |
72 | u32 pid; |
73 | u32 tid; | |
a21ca2ca | 74 | char comm[16]; |
de9ac07b PZ |
75 | }; |
76 | ||
a21ca2ca | 77 | |
de9ac07b | 78 | struct mmap_data { |
a21ca2ca IM |
79 | int counter; |
80 | void *base; | |
81 | unsigned int mask; | |
82 | unsigned int prev; | |
de9ac07b PZ |
83 | }; |
84 | ||
a21ca2ca IM |
85 | static struct mmap_data mmap_array[MAX_NR_CPUS][MAX_COUNTERS]; |
86 | ||
9d91a6f7 | 87 | static unsigned long mmap_read_head(struct mmap_data *md) |
de9ac07b PZ |
88 | { |
89 | struct perf_counter_mmap_page *pc = md->base; | |
9d91a6f7 | 90 | long head; |
de9ac07b PZ |
91 | |
92 | head = pc->data_head; | |
93 | rmb(); | |
94 | ||
95 | return head; | |
96 | } | |
97 | ||
9d91a6f7 PZ |
98 | static void mmap_write_tail(struct mmap_data *md, unsigned long tail) |
99 | { | |
100 | struct perf_counter_mmap_page *pc = md->base; | |
101 | ||
102 | /* | |
103 | * ensure all reads are done before we write the tail out. | |
104 | */ | |
105 | /* mb(); */ | |
106 | pc->data_tail = tail; | |
107 | } | |
108 | ||
f5970550 PZ |
109 | static void write_output(void *buf, size_t size) |
110 | { | |
111 | while (size) { | |
112 | int ret = write(output, buf, size); | |
113 | ||
114 | if (ret < 0) | |
115 | die("failed to write"); | |
116 | ||
117 | size -= ret; | |
118 | buf += ret; | |
119 | ||
120 | bytes_written += ret; | |
121 | } | |
122 | } | |
123 | ||
de9ac07b PZ |
124 | static void mmap_read(struct mmap_data *md) |
125 | { | |
126 | unsigned int head = mmap_read_head(md); | |
127 | unsigned int old = md->prev; | |
128 | unsigned char *data = md->base + page_size; | |
129 | unsigned long size; | |
130 | void *buf; | |
131 | int diff; | |
132 | ||
133 | gettimeofday(&this_read, NULL); | |
134 | ||
135 | /* | |
136 | * If we're further behind than half the buffer, there's a chance | |
2debbc83 | 137 | * the writer will bite our tail and mess up the samples under us. |
de9ac07b PZ |
138 | * |
139 | * If we somehow ended up ahead of the head, we got messed up. | |
140 | * | |
141 | * In either case, truncate and restart at head. | |
142 | */ | |
143 | diff = head - old; | |
9d91a6f7 | 144 | if (diff < 0) { |
de9ac07b PZ |
145 | struct timeval iv; |
146 | unsigned long msecs; | |
147 | ||
148 | timersub(&this_read, &last_read, &iv); | |
149 | msecs = iv.tv_sec*1000 + iv.tv_usec/1000; | |
150 | ||
151 | fprintf(stderr, "WARNING: failed to keep up with mmap data." | |
152 | " Last read %lu msecs ago.\n", msecs); | |
153 | ||
154 | /* | |
155 | * head points to a known good entry, start there. | |
156 | */ | |
157 | old = head; | |
158 | } | |
159 | ||
160 | last_read = this_read; | |
161 | ||
162 | if (old != head) | |
2debbc83 | 163 | samples++; |
de9ac07b PZ |
164 | |
165 | size = head - old; | |
166 | ||
167 | if ((old & md->mask) + size != (head & md->mask)) { | |
168 | buf = &data[old & md->mask]; | |
169 | size = md->mask + 1 - (old & md->mask); | |
170 | old += size; | |
021e9f47 | 171 | |
f5970550 | 172 | write_output(buf, size); |
de9ac07b PZ |
173 | } |
174 | ||
175 | buf = &data[old & md->mask]; | |
176 | size = head - old; | |
177 | old += size; | |
021e9f47 | 178 | |
f5970550 | 179 | write_output(buf, size); |
de9ac07b PZ |
180 | |
181 | md->prev = old; | |
9d91a6f7 | 182 | mmap_write_tail(md, old); |
de9ac07b PZ |
183 | } |
184 | ||
185 | static volatile int done = 0; | |
f7b7c26e | 186 | static volatile int signr = -1; |
de9ac07b | 187 | |
16c8a109 | 188 | static void sig_handler(int sig) |
de9ac07b | 189 | { |
16c8a109 | 190 | done = 1; |
f7b7c26e PZ |
191 | signr = sig; |
192 | } | |
193 | ||
194 | static void sig_atexit(void) | |
195 | { | |
196 | if (signr == -1) | |
197 | return; | |
198 | ||
199 | signal(signr, SIG_DFL); | |
200 | kill(getpid(), signr); | |
de9ac07b PZ |
201 | } |
202 | ||
f70e87d7 | 203 | static void pid_synthesize_comm_event(pid_t pid, int full) |
1a853e36 | 204 | { |
16f762a2 | 205 | struct comm_event comm_ev; |
1a853e36 ACM |
206 | char filename[PATH_MAX]; |
207 | char bf[BUFSIZ]; | |
f5970550 | 208 | int fd; |
1a853e36 | 209 | size_t size; |
a0055ae2 | 210 | char *field, *sep; |
f70e87d7 PZ |
211 | DIR *tasks; |
212 | struct dirent dirent, *next; | |
1a853e36 ACM |
213 | |
214 | snprintf(filename, sizeof(filename), "/proc/%d/stat", pid); | |
215 | ||
216 | fd = open(filename, O_RDONLY); | |
217 | if (fd < 0) { | |
613d8602 IM |
218 | /* |
219 | * We raced with a task exiting - just return: | |
220 | */ | |
221 | if (verbose) | |
222 | fprintf(stderr, "couldn't open %s\n", filename); | |
223 | return; | |
1a853e36 ACM |
224 | } |
225 | if (read(fd, bf, sizeof(bf)) < 0) { | |
226 | fprintf(stderr, "couldn't read %s\n", filename); | |
227 | exit(EXIT_FAILURE); | |
228 | } | |
229 | close(fd); | |
230 | ||
a0055ae2 | 231 | /* 9027 (cat) R 6747 9027 6747 34816 9027 ... */ |
1a853e36 | 232 | memset(&comm_ev, 0, sizeof(comm_ev)); |
a0055ae2 ACM |
233 | field = strchr(bf, '('); |
234 | if (field == NULL) | |
235 | goto out_failure; | |
236 | sep = strchr(++field, ')'); | |
237 | if (sep == NULL) | |
238 | goto out_failure; | |
239 | size = sep - field; | |
240 | memcpy(comm_ev.comm, field, size++); | |
f70e87d7 PZ |
241 | |
242 | comm_ev.pid = pid; | |
1a853e36 | 243 | comm_ev.header.type = PERF_EVENT_COMM; |
9cffa8d5 | 244 | size = ALIGN(size, sizeof(u64)); |
1a853e36 | 245 | comm_ev.header.size = sizeof(comm_ev) - (sizeof(comm_ev.comm) - size); |
16f762a2 | 246 | |
f70e87d7 PZ |
247 | if (!full) { |
248 | comm_ev.tid = pid; | |
249 | ||
f5970550 | 250 | write_output(&comm_ev, comm_ev.header.size); |
f70e87d7 PZ |
251 | return; |
252 | } | |
253 | ||
254 | snprintf(filename, sizeof(filename), "/proc/%d/task", pid); | |
255 | ||
256 | tasks = opendir(filename); | |
257 | while (!readdir_r(tasks, &dirent, &next) && next) { | |
258 | char *end; | |
259 | pid = strtol(dirent.d_name, &end, 10); | |
260 | if (*end) | |
261 | continue; | |
262 | ||
263 | comm_ev.tid = pid; | |
264 | ||
f5970550 | 265 | write_output(&comm_ev, comm_ev.header.size); |
1a853e36 | 266 | } |
f70e87d7 PZ |
267 | closedir(tasks); |
268 | return; | |
269 | ||
a0055ae2 ACM |
270 | out_failure: |
271 | fprintf(stderr, "couldn't get COMM and pgid, malformed %s\n", | |
272 | filename); | |
273 | exit(EXIT_FAILURE); | |
1a853e36 ACM |
274 | } |
275 | ||
2debbc83 | 276 | static void pid_synthesize_mmap_samples(pid_t pid) |
1a853e36 ACM |
277 | { |
278 | char filename[PATH_MAX]; | |
279 | FILE *fp; | |
280 | ||
281 | snprintf(filename, sizeof(filename), "/proc/%d/maps", pid); | |
282 | ||
283 | fp = fopen(filename, "r"); | |
284 | if (fp == NULL) { | |
613d8602 IM |
285 | /* |
286 | * We raced with a task exiting - just return: | |
287 | */ | |
288 | if (verbose) | |
289 | fprintf(stderr, "couldn't open %s\n", filename); | |
290 | return; | |
1a853e36 ACM |
291 | } |
292 | while (1) { | |
a0055ae2 | 293 | char bf[BUFSIZ], *pbf = bf; |
1a853e36 ACM |
294 | struct mmap_event mmap_ev = { |
295 | .header.type = PERF_EVENT_MMAP, | |
296 | }; | |
a0055ae2 | 297 | int n; |
1a853e36 ACM |
298 | size_t size; |
299 | if (fgets(bf, sizeof(bf), fp) == NULL) | |
300 | break; | |
301 | ||
302 | /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */ | |
a0055ae2 ACM |
303 | n = hex2u64(pbf, &mmap_ev.start); |
304 | if (n < 0) | |
305 | continue; | |
306 | pbf += n + 1; | |
307 | n = hex2u64(pbf, &mmap_ev.len); | |
308 | if (n < 0) | |
309 | continue; | |
310 | pbf += n + 3; | |
311 | if (*pbf == 'x') { /* vm_exec */ | |
76c64c5e | 312 | char *execname = strchr(bf, '/'); |
1a853e36 | 313 | |
76c64c5e | 314 | if (execname == NULL) |
1a853e36 ACM |
315 | continue; |
316 | ||
1a853e36 ACM |
317 | size = strlen(execname); |
318 | execname[size - 1] = '\0'; /* Remove \n */ | |
319 | memcpy(mmap_ev.filename, execname, size); | |
9cffa8d5 | 320 | size = ALIGN(size, sizeof(u64)); |
1a853e36 ACM |
321 | mmap_ev.len -= mmap_ev.start; |
322 | mmap_ev.header.size = (sizeof(mmap_ev) - | |
323 | (sizeof(mmap_ev.filename) - size)); | |
f70e87d7 | 324 | mmap_ev.pid = pid; |
1a853e36 ACM |
325 | mmap_ev.tid = pid; |
326 | ||
f5970550 | 327 | write_output(&mmap_ev, mmap_ev.header.size); |
1a853e36 ACM |
328 | } |
329 | } | |
330 | ||
331 | fclose(fp); | |
332 | } | |
333 | ||
7c6a1c65 | 334 | static void synthesize_all(void) |
f70e87d7 PZ |
335 | { |
336 | DIR *proc; | |
337 | struct dirent dirent, *next; | |
338 | ||
339 | proc = opendir("/proc"); | |
340 | ||
341 | while (!readdir_r(proc, &dirent, &next) && next) { | |
342 | char *end; | |
343 | pid_t pid; | |
344 | ||
345 | pid = strtol(dirent.d_name, &end, 10); | |
346 | if (*end) /* only interested in proper numerical dirents */ | |
347 | continue; | |
348 | ||
349 | pid_synthesize_comm_event(pid, 1); | |
2debbc83 | 350 | pid_synthesize_mmap_samples(pid); |
f70e87d7 PZ |
351 | } |
352 | ||
353 | closedir(proc); | |
354 | } | |
355 | ||
f250c030 IM |
356 | static int group_fd; |
357 | ||
7c6a1c65 PZ |
358 | static struct perf_header_attr *get_header_attr(struct perf_counter_attr *a, int nr) |
359 | { | |
360 | struct perf_header_attr *h_attr; | |
361 | ||
362 | if (nr < header->attrs) { | |
363 | h_attr = header->attr[nr]; | |
364 | } else { | |
365 | h_attr = perf_header_attr__new(a); | |
366 | perf_header__add_attr(header, h_attr); | |
367 | } | |
368 | ||
369 | return h_attr; | |
370 | } | |
371 | ||
f250c030 | 372 | static void create_counter(int counter, int cpu, pid_t pid) |
de9ac07b | 373 | { |
a21ca2ca | 374 | struct perf_counter_attr *attr = attrs + counter; |
7c6a1c65 PZ |
375 | struct perf_header_attr *h_attr; |
376 | int track = !counter; /* only the first counter needs these */ | |
377 | struct { | |
378 | u64 count; | |
379 | u64 time_enabled; | |
380 | u64 time_running; | |
381 | u64 id; | |
382 | } read_data; | |
383 | ||
384 | attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | | |
385 | PERF_FORMAT_TOTAL_TIME_RUNNING | | |
386 | PERF_FORMAT_ID; | |
16c8a109 | 387 | |
ea1900e5 | 388 | attr->sample_type = PERF_SAMPLE_IP | PERF_SAMPLE_TID; |
3efa1cc9 | 389 | |
1dba15e7 | 390 | if (freq) { |
ea1900e5 | 391 | attr->sample_type |= PERF_SAMPLE_PERIOD; |
a21ca2ca IM |
392 | attr->freq = 1; |
393 | attr->sample_freq = freq; | |
1dba15e7 | 394 | } |
3efa1cc9 IM |
395 | |
396 | if (call_graph) | |
397 | attr->sample_type |= PERF_SAMPLE_CALLCHAIN; | |
398 | ||
a21ca2ca IM |
399 | attr->mmap = track; |
400 | attr->comm = track; | |
401 | attr->inherit = (cpu < 0) && inherit; | |
4502d77c | 402 | attr->disabled = 1; |
16c8a109 | 403 | |
3da297a6 | 404 | try_again: |
a21ca2ca | 405 | fd[nr_cpu][counter] = sys_perf_counter_open(attr, pid, cpu, group_fd, 0); |
16c8a109 | 406 | |
f250c030 IM |
407 | if (fd[nr_cpu][counter] < 0) { |
408 | int err = errno; | |
16c8a109 | 409 | |
f250c030 | 410 | if (err == EPERM) |
3da297a6 IM |
411 | die("Permission error - are you root?\n"); |
412 | ||
413 | /* | |
414 | * If it's cycles then fall back to hrtimer | |
415 | * based cpu-clock-tick sw counter, which | |
416 | * is always available even if no PMU support: | |
417 | */ | |
418 | if (attr->type == PERF_TYPE_HARDWARE | |
f4dbfa8f | 419 | && attr->config == PERF_COUNT_HW_CPU_CYCLES) { |
3da297a6 IM |
420 | |
421 | if (verbose) | |
422 | warning(" ... trying to fall back to cpu-clock-ticks\n"); | |
423 | attr->type = PERF_TYPE_SOFTWARE; | |
f4dbfa8f | 424 | attr->config = PERF_COUNT_SW_CPU_CLOCK; |
3da297a6 IM |
425 | goto try_again; |
426 | } | |
30c806a0 IM |
427 | printf("\n"); |
428 | error("perfcounter syscall returned with %d (%s)\n", | |
429 | fd[nr_cpu][counter], strerror(err)); | |
430 | die("No CONFIG_PERF_COUNTERS=y kernel support configured?\n"); | |
f250c030 IM |
431 | exit(-1); |
432 | } | |
3da297a6 | 433 | |
7c6a1c65 PZ |
434 | h_attr = get_header_attr(attr, counter); |
435 | ||
436 | if (!file_new) { | |
437 | if (memcmp(&h_attr->attr, attr, sizeof(*attr))) { | |
438 | fprintf(stderr, "incompatible append\n"); | |
439 | exit(-1); | |
440 | } | |
441 | } | |
442 | ||
443 | read(fd[nr_cpu][counter], &read_data, sizeof(read_data)); | |
444 | ||
445 | perf_header_attr__add_id(h_attr, read_data.id); | |
446 | ||
f250c030 IM |
447 | assert(fd[nr_cpu][counter] >= 0); |
448 | fcntl(fd[nr_cpu][counter], F_SETFL, O_NONBLOCK); | |
16c8a109 | 449 | |
f250c030 IM |
450 | /* |
451 | * First counter acts as the group leader: | |
452 | */ | |
453 | if (group && group_fd == -1) | |
454 | group_fd = fd[nr_cpu][counter]; | |
455 | ||
456 | event_array[nr_poll].fd = fd[nr_cpu][counter]; | |
457 | event_array[nr_poll].events = POLLIN; | |
458 | nr_poll++; | |
459 | ||
460 | mmap_array[nr_cpu][counter].counter = counter; | |
461 | mmap_array[nr_cpu][counter].prev = 0; | |
462 | mmap_array[nr_cpu][counter].mask = mmap_pages*page_size - 1; | |
463 | mmap_array[nr_cpu][counter].base = mmap(NULL, (mmap_pages+1)*page_size, | |
9d91a6f7 | 464 | PROT_READ|PROT_WRITE, MAP_SHARED, fd[nr_cpu][counter], 0); |
f250c030 IM |
465 | if (mmap_array[nr_cpu][counter].base == MAP_FAILED) { |
466 | error("failed to mmap with %d (%s)\n", errno, strerror(errno)); | |
467 | exit(-1); | |
468 | } | |
4502d77c PZ |
469 | |
470 | ioctl(fd[nr_cpu][counter], PERF_COUNTER_IOC_ENABLE); | |
f250c030 | 471 | } |
f2521b6e | 472 | |
f250c030 IM |
473 | static void open_counters(int cpu, pid_t pid) |
474 | { | |
475 | int counter; | |
16c8a109 | 476 | |
f250c030 IM |
477 | group_fd = -1; |
478 | for (counter = 0; counter < nr_counters; counter++) | |
479 | create_counter(counter, cpu, pid); | |
480 | ||
16c8a109 PZ |
481 | nr_cpu++; |
482 | } | |
483 | ||
f5970550 PZ |
484 | static void atexit_header(void) |
485 | { | |
7c6a1c65 | 486 | header->data_size += bytes_written; |
f5970550 | 487 | |
7c6a1c65 | 488 | perf_header__write(header, output); |
f5970550 PZ |
489 | } |
490 | ||
0e9b20b8 | 491 | static int __cmd_record(int argc, const char **argv) |
16c8a109 PZ |
492 | { |
493 | int i, counter; | |
abaff32a | 494 | struct stat st; |
7c6a1c65 | 495 | pid_t pid = 0; |
abaff32a | 496 | int flags; |
de9ac07b PZ |
497 | int ret; |
498 | ||
499 | page_size = sysconf(_SC_PAGE_SIZE); | |
de9ac07b PZ |
500 | nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
501 | assert(nr_cpus <= MAX_NR_CPUS); | |
502 | assert(nr_cpus >= 0); | |
503 | ||
f5970550 PZ |
504 | atexit(sig_atexit); |
505 | signal(SIGCHLD, sig_handler); | |
506 | signal(SIGINT, sig_handler); | |
507 | ||
abaff32a IM |
508 | if (!stat(output_name, &st) && !force && !append_file) { |
509 | fprintf(stderr, "Error, output file %s exists, use -A to append or -f to overwrite.\n", | |
97124d5e PZ |
510 | output_name); |
511 | exit(-1); | |
512 | } | |
513 | ||
abaff32a IM |
514 | flags = O_CREAT|O_RDWR; |
515 | if (append_file) | |
f5970550 | 516 | file_new = 0; |
abaff32a IM |
517 | else |
518 | flags |= O_TRUNC; | |
519 | ||
520 | output = open(output_name, flags, S_IRUSR|S_IWUSR); | |
de9ac07b PZ |
521 | if (output < 0) { |
522 | perror("failed to create output file"); | |
523 | exit(-1); | |
524 | } | |
525 | ||
7c6a1c65 PZ |
526 | if (!file_new) |
527 | header = perf_header__read(output); | |
528 | else | |
529 | header = perf_header__new(); | |
f5970550 PZ |
530 | |
531 | atexit(atexit_header); | |
532 | ||
1a853e36 | 533 | if (!system_wide) { |
7c6a1c65 PZ |
534 | pid = target_pid; |
535 | if (pid == -1) | |
536 | pid = getpid(); | |
537 | ||
538 | open_counters(-1, pid); | |
1a853e36 ACM |
539 | } else for (i = 0; i < nr_cpus; i++) |
540 | open_counters(i, target_pid); | |
de9ac07b | 541 | |
7c6a1c65 PZ |
542 | if (file_new) |
543 | perf_header__write(header, output); | |
544 | ||
545 | if (!system_wide) { | |
546 | pid_synthesize_comm_event(pid, 0); | |
547 | pid_synthesize_mmap_samples(pid); | |
548 | } else | |
549 | synthesize_all(); | |
550 | ||
ef65b2a0 | 551 | if (target_pid == -1 && argc) { |
1a853e36 ACM |
552 | pid = fork(); |
553 | if (pid < 0) | |
554 | perror("failed to fork"); | |
de9ac07b | 555 | |
1a853e36 | 556 | if (!pid) { |
0e9b20b8 | 557 | if (execvp(argv[0], (char **)argv)) { |
1a853e36 ACM |
558 | perror(argv[0]); |
559 | exit(-1); | |
560 | } | |
de9ac07b PZ |
561 | } |
562 | } | |
563 | ||
564 | if (realtime_prio) { | |
565 | struct sched_param param; | |
566 | ||
567 | param.sched_priority = realtime_prio; | |
568 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { | |
569 | printf("Could not set realtime priority.\n"); | |
570 | exit(-1); | |
571 | } | |
572 | } | |
573 | ||
de9ac07b | 574 | while (!done) { |
2debbc83 | 575 | int hits = samples; |
de9ac07b | 576 | |
16c8a109 | 577 | for (i = 0; i < nr_cpu; i++) { |
de9ac07b PZ |
578 | for (counter = 0; counter < nr_counters; counter++) |
579 | mmap_read(&mmap_array[i][counter]); | |
580 | } | |
581 | ||
2debbc83 | 582 | if (hits == samples) |
de9ac07b PZ |
583 | ret = poll(event_array, nr_poll, 100); |
584 | } | |
585 | ||
021e9f47 IM |
586 | /* |
587 | * Approximate RIP event size: 24 bytes. | |
588 | */ | |
589 | fprintf(stderr, | |
2debbc83 | 590 | "[ perf record: Captured and wrote %.3f MB %s (~%lld samples) ]\n", |
021e9f47 IM |
591 | (double)bytes_written / 1024.0 / 1024.0, |
592 | output_name, | |
593 | bytes_written / 24); | |
addc2785 | 594 | |
de9ac07b PZ |
595 | return 0; |
596 | } | |
0e9b20b8 | 597 | |
0e9b20b8 | 598 | static const char * const record_usage[] = { |
9e096753 MG |
599 | "perf record [<options>] [<command>]", |
600 | "perf record [<options>] -- <command> [<options>]", | |
0e9b20b8 IM |
601 | NULL |
602 | }; | |
603 | ||
5242519b | 604 | static const struct option options[] = { |
0e9b20b8 | 605 | OPT_CALLBACK('e', "event", NULL, "event", |
86847b62 TG |
606 | "event selector. use 'perf list' to list available events", |
607 | parse_events), | |
0e9b20b8 IM |
608 | OPT_INTEGER('p', "pid", &target_pid, |
609 | "record events on existing pid"), | |
610 | OPT_INTEGER('r', "realtime", &realtime_prio, | |
611 | "collect data with this RT SCHED_FIFO priority"), | |
612 | OPT_BOOLEAN('a', "all-cpus", &system_wide, | |
613 | "system-wide collection from all CPUs"), | |
abaff32a IM |
614 | OPT_BOOLEAN('A', "append", &append_file, |
615 | "append to the output file to do incremental profiling"), | |
97124d5e PZ |
616 | OPT_BOOLEAN('f', "force", &force, |
617 | "overwrite existing data file"), | |
e61078a0 | 618 | OPT_LONG('c', "count", &default_interval, |
abaff32a IM |
619 | "event period to sample"), |
620 | OPT_STRING('o', "output", &output_name, "file", | |
621 | "output file name"), | |
622 | OPT_BOOLEAN('i', "inherit", &inherit, | |
623 | "child tasks inherit counters"), | |
cf1f4574 IM |
624 | OPT_INTEGER('F', "freq", &freq, |
625 | "profile at this frequency"), | |
abaff32a IM |
626 | OPT_INTEGER('m', "mmap-pages", &mmap_pages, |
627 | "number of mmap data pages"), | |
3efa1cc9 IM |
628 | OPT_BOOLEAN('g', "call-graph", &call_graph, |
629 | "do call-graph (stack chain/backtrace) recording"), | |
3da297a6 IM |
630 | OPT_BOOLEAN('v', "verbose", &verbose, |
631 | "be more verbose (show counter open errors, etc)"), | |
0e9b20b8 IM |
632 | OPT_END() |
633 | }; | |
634 | ||
635 | int cmd_record(int argc, const char **argv, const char *prefix) | |
636 | { | |
637 | int counter; | |
638 | ||
0e9b20b8 | 639 | argc = parse_options(argc, argv, options, record_usage, 0); |
ef65b2a0 | 640 | if (!argc && target_pid == -1 && !system_wide) |
0e9b20b8 IM |
641 | usage_with_options(record_usage, options); |
642 | ||
bbd36e5e PZ |
643 | if (!nr_counters) { |
644 | nr_counters = 1; | |
645 | attrs[0].type = PERF_TYPE_HARDWARE; | |
646 | attrs[0].config = PERF_COUNT_HW_CPU_CYCLES; | |
647 | } | |
0e9b20b8 IM |
648 | |
649 | for (counter = 0; counter < nr_counters; counter++) { | |
a21ca2ca | 650 | if (attrs[counter].sample_period) |
0e9b20b8 IM |
651 | continue; |
652 | ||
a21ca2ca | 653 | attrs[counter].sample_period = default_interval; |
0e9b20b8 IM |
654 | } |
655 | ||
656 | return __cmd_record(argc, argv); | |
657 | } |