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" |
5f9c39dc | 20 | #include "util/trace-event.h" |
7c6a1c65 | 21 | |
97124d5e | 22 | #include <unistd.h> |
de9ac07b | 23 | #include <sched.h> |
de9ac07b | 24 | |
0e9b20b8 IM |
25 | #define ALIGN(x, a) __ALIGN_MASK(x, (typeof(x))(a)-1) |
26 | #define __ALIGN_MASK(x, mask) (((x)+(mask))&~(mask)) | |
1a853e36 | 27 | |
de9ac07b | 28 | static int fd[MAX_NR_CPUS][MAX_COUNTERS]; |
a21ca2ca IM |
29 | |
30 | static long default_interval = 100000; | |
31 | ||
3cf165fc | 32 | static int nr_cpus = 0; |
de9ac07b | 33 | static unsigned int page_size; |
3cf165fc | 34 | static unsigned int mmap_pages = 128; |
cf1f4574 | 35 | static int freq = 0; |
de9ac07b | 36 | static int output; |
23ac9cbe | 37 | static const char *output_name = "perf.data"; |
de9ac07b | 38 | static int group = 0; |
16c8a109 | 39 | static unsigned int realtime_prio = 0; |
daac07b2 | 40 | static int raw_samples = 0; |
16c8a109 | 41 | static int system_wide = 0; |
0a5ac846 | 42 | static int profile_cpu = -1; |
1a853e36 | 43 | static pid_t target_pid = -1; |
16c8a109 | 44 | static int inherit = 1; |
97124d5e | 45 | static int force = 0; |
abaff32a | 46 | static int append_file = 0; |
3efa1cc9 | 47 | static int call_graph = 0; |
649c48a9 PZ |
48 | static int inherit_stat = 0; |
49 | static int no_samples = 0; | |
4bba828d | 50 | static int sample_address = 0; |
de9ac07b | 51 | |
a21ca2ca IM |
52 | static long samples; |
53 | static struct timeval last_read; | |
54 | static struct timeval this_read; | |
55 | ||
9cffa8d5 | 56 | static u64 bytes_written; |
a21ca2ca IM |
57 | |
58 | static struct pollfd event_array[MAX_NR_CPUS * MAX_COUNTERS]; | |
59 | ||
60 | static int nr_poll; | |
61 | static int nr_cpu; | |
62 | ||
f5970550 | 63 | static int file_new = 1; |
7c6a1c65 PZ |
64 | |
65 | struct perf_header *header; | |
f5970550 | 66 | |
de9ac07b | 67 | struct mmap_data { |
a21ca2ca IM |
68 | int counter; |
69 | void *base; | |
70 | unsigned int mask; | |
71 | unsigned int prev; | |
de9ac07b PZ |
72 | }; |
73 | ||
a21ca2ca IM |
74 | static struct mmap_data mmap_array[MAX_NR_CPUS][MAX_COUNTERS]; |
75 | ||
9d91a6f7 | 76 | static unsigned long mmap_read_head(struct mmap_data *md) |
de9ac07b PZ |
77 | { |
78 | struct perf_counter_mmap_page *pc = md->base; | |
9d91a6f7 | 79 | long head; |
de9ac07b PZ |
80 | |
81 | head = pc->data_head; | |
82 | rmb(); | |
83 | ||
84 | return head; | |
85 | } | |
86 | ||
9d91a6f7 PZ |
87 | static void mmap_write_tail(struct mmap_data *md, unsigned long tail) |
88 | { | |
89 | struct perf_counter_mmap_page *pc = md->base; | |
90 | ||
91 | /* | |
92 | * ensure all reads are done before we write the tail out. | |
93 | */ | |
94 | /* mb(); */ | |
95 | pc->data_tail = tail; | |
96 | } | |
97 | ||
f5970550 PZ |
98 | static void write_output(void *buf, size_t size) |
99 | { | |
100 | while (size) { | |
101 | int ret = write(output, buf, size); | |
102 | ||
103 | if (ret < 0) | |
104 | die("failed to write"); | |
105 | ||
106 | size -= ret; | |
107 | buf += ret; | |
108 | ||
109 | bytes_written += ret; | |
110 | } | |
111 | } | |
112 | ||
de9ac07b PZ |
113 | static void mmap_read(struct mmap_data *md) |
114 | { | |
115 | unsigned int head = mmap_read_head(md); | |
116 | unsigned int old = md->prev; | |
117 | unsigned char *data = md->base + page_size; | |
118 | unsigned long size; | |
119 | void *buf; | |
120 | int diff; | |
121 | ||
122 | gettimeofday(&this_read, NULL); | |
123 | ||
124 | /* | |
125 | * If we're further behind than half the buffer, there's a chance | |
2debbc83 | 126 | * the writer will bite our tail and mess up the samples under us. |
de9ac07b PZ |
127 | * |
128 | * If we somehow ended up ahead of the head, we got messed up. | |
129 | * | |
130 | * In either case, truncate and restart at head. | |
131 | */ | |
132 | diff = head - old; | |
9d91a6f7 | 133 | if (diff < 0) { |
de9ac07b PZ |
134 | struct timeval iv; |
135 | unsigned long msecs; | |
136 | ||
137 | timersub(&this_read, &last_read, &iv); | |
138 | msecs = iv.tv_sec*1000 + iv.tv_usec/1000; | |
139 | ||
140 | fprintf(stderr, "WARNING: failed to keep up with mmap data." | |
141 | " Last read %lu msecs ago.\n", msecs); | |
142 | ||
143 | /* | |
144 | * head points to a known good entry, start there. | |
145 | */ | |
146 | old = head; | |
147 | } | |
148 | ||
149 | last_read = this_read; | |
150 | ||
151 | if (old != head) | |
2debbc83 | 152 | samples++; |
de9ac07b PZ |
153 | |
154 | size = head - old; | |
155 | ||
156 | if ((old & md->mask) + size != (head & md->mask)) { | |
157 | buf = &data[old & md->mask]; | |
158 | size = md->mask + 1 - (old & md->mask); | |
159 | old += size; | |
021e9f47 | 160 | |
f5970550 | 161 | write_output(buf, size); |
de9ac07b PZ |
162 | } |
163 | ||
164 | buf = &data[old & md->mask]; | |
165 | size = head - old; | |
166 | old += size; | |
021e9f47 | 167 | |
f5970550 | 168 | write_output(buf, size); |
de9ac07b PZ |
169 | |
170 | md->prev = old; | |
9d91a6f7 | 171 | mmap_write_tail(md, old); |
de9ac07b PZ |
172 | } |
173 | ||
174 | static volatile int done = 0; | |
f7b7c26e | 175 | static volatile int signr = -1; |
de9ac07b | 176 | |
16c8a109 | 177 | static void sig_handler(int sig) |
de9ac07b | 178 | { |
16c8a109 | 179 | done = 1; |
f7b7c26e PZ |
180 | signr = sig; |
181 | } | |
182 | ||
183 | static void sig_atexit(void) | |
184 | { | |
185 | if (signr == -1) | |
186 | return; | |
187 | ||
188 | signal(signr, SIG_DFL); | |
189 | kill(getpid(), signr); | |
de9ac07b PZ |
190 | } |
191 | ||
2a8083f0 | 192 | static pid_t pid_synthesize_comm_event(pid_t pid, int full) |
1a853e36 | 193 | { |
16f762a2 | 194 | struct comm_event comm_ev; |
1a853e36 ACM |
195 | char filename[PATH_MAX]; |
196 | char bf[BUFSIZ]; | |
2a8083f0 ACM |
197 | FILE *fp; |
198 | size_t size = 0; | |
f70e87d7 PZ |
199 | DIR *tasks; |
200 | struct dirent dirent, *next; | |
2a8083f0 | 201 | pid_t tgid = 0; |
1a853e36 | 202 | |
2a8083f0 | 203 | snprintf(filename, sizeof(filename), "/proc/%d/status", pid); |
1a853e36 | 204 | |
2a8083f0 | 205 | fp = fopen(filename, "r"); |
39e6dd73 | 206 | if (fp == NULL) { |
613d8602 IM |
207 | /* |
208 | * We raced with a task exiting - just return: | |
209 | */ | |
210 | if (verbose) | |
211 | fprintf(stderr, "couldn't open %s\n", filename); | |
2a8083f0 | 212 | return 0; |
1a853e36 | 213 | } |
1a853e36 | 214 | |
1a853e36 | 215 | memset(&comm_ev, 0, sizeof(comm_ev)); |
2a8083f0 ACM |
216 | while (!comm_ev.comm[0] || !comm_ev.pid) { |
217 | if (fgets(bf, sizeof(bf), fp) == NULL) | |
218 | goto out_failure; | |
219 | ||
220 | if (memcmp(bf, "Name:", 5) == 0) { | |
221 | char *name = bf + 5; | |
222 | while (*name && isspace(*name)) | |
223 | ++name; | |
224 | size = strlen(name) - 1; | |
225 | memcpy(comm_ev.comm, name, size++); | |
226 | } else if (memcmp(bf, "Tgid:", 5) == 0) { | |
227 | char *tgids = bf + 5; | |
228 | while (*tgids && isspace(*tgids)) | |
229 | ++tgids; | |
230 | tgid = comm_ev.pid = atoi(tgids); | |
231 | } | |
232 | } | |
233 | ||
1a853e36 | 234 | comm_ev.header.type = PERF_EVENT_COMM; |
9cffa8d5 | 235 | size = ALIGN(size, sizeof(u64)); |
1a853e36 | 236 | comm_ev.header.size = sizeof(comm_ev) - (sizeof(comm_ev.comm) - size); |
16f762a2 | 237 | |
f70e87d7 PZ |
238 | if (!full) { |
239 | comm_ev.tid = pid; | |
240 | ||
f5970550 | 241 | write_output(&comm_ev, comm_ev.header.size); |
2a8083f0 | 242 | goto out_fclose; |
f70e87d7 PZ |
243 | } |
244 | ||
245 | snprintf(filename, sizeof(filename), "/proc/%d/task", pid); | |
246 | ||
247 | tasks = opendir(filename); | |
248 | while (!readdir_r(tasks, &dirent, &next) && next) { | |
249 | char *end; | |
250 | pid = strtol(dirent.d_name, &end, 10); | |
251 | if (*end) | |
252 | continue; | |
253 | ||
254 | comm_ev.tid = pid; | |
255 | ||
f5970550 | 256 | write_output(&comm_ev, comm_ev.header.size); |
1a853e36 | 257 | } |
f70e87d7 | 258 | closedir(tasks); |
2a8083f0 ACM |
259 | |
260 | out_fclose: | |
261 | fclose(fp); | |
262 | return tgid; | |
f70e87d7 | 263 | |
a0055ae2 ACM |
264 | out_failure: |
265 | fprintf(stderr, "couldn't get COMM and pgid, malformed %s\n", | |
266 | filename); | |
267 | exit(EXIT_FAILURE); | |
1a853e36 ACM |
268 | } |
269 | ||
2a8083f0 | 270 | static void pid_synthesize_mmap_samples(pid_t pid, pid_t tgid) |
1a853e36 ACM |
271 | { |
272 | char filename[PATH_MAX]; | |
273 | FILE *fp; | |
274 | ||
275 | snprintf(filename, sizeof(filename), "/proc/%d/maps", pid); | |
276 | ||
277 | fp = fopen(filename, "r"); | |
278 | if (fp == NULL) { | |
613d8602 IM |
279 | /* |
280 | * We raced with a task exiting - just return: | |
281 | */ | |
282 | if (verbose) | |
283 | fprintf(stderr, "couldn't open %s\n", filename); | |
284 | return; | |
1a853e36 ACM |
285 | } |
286 | while (1) { | |
a0055ae2 | 287 | char bf[BUFSIZ], *pbf = bf; |
1a853e36 | 288 | struct mmap_event mmap_ev = { |
f37a291c | 289 | .header = { .type = PERF_EVENT_MMAP }, |
1a853e36 | 290 | }; |
a0055ae2 | 291 | int n; |
1a853e36 ACM |
292 | size_t size; |
293 | if (fgets(bf, sizeof(bf), fp) == NULL) | |
294 | break; | |
295 | ||
296 | /* 00400000-0040c000 r-xp 00000000 fd:01 41038 /bin/cat */ | |
a0055ae2 ACM |
297 | n = hex2u64(pbf, &mmap_ev.start); |
298 | if (n < 0) | |
299 | continue; | |
300 | pbf += n + 1; | |
301 | n = hex2u64(pbf, &mmap_ev.len); | |
302 | if (n < 0) | |
303 | continue; | |
304 | pbf += n + 3; | |
305 | if (*pbf == 'x') { /* vm_exec */ | |
76c64c5e | 306 | char *execname = strchr(bf, '/'); |
1a853e36 | 307 | |
11b5f81e AB |
308 | /* Catch VDSO */ |
309 | if (execname == NULL) | |
310 | execname = strstr(bf, "[vdso]"); | |
311 | ||
76c64c5e | 312 | if (execname == NULL) |
1a853e36 ACM |
313 | continue; |
314 | ||
1a853e36 ACM |
315 | size = strlen(execname); |
316 | execname[size - 1] = '\0'; /* Remove \n */ | |
317 | memcpy(mmap_ev.filename, execname, size); | |
9cffa8d5 | 318 | size = ALIGN(size, sizeof(u64)); |
1a853e36 ACM |
319 | mmap_ev.len -= mmap_ev.start; |
320 | mmap_ev.header.size = (sizeof(mmap_ev) - | |
321 | (sizeof(mmap_ev.filename) - size)); | |
2a8083f0 | 322 | mmap_ev.pid = tgid; |
1a853e36 ACM |
323 | mmap_ev.tid = pid; |
324 | ||
f5970550 | 325 | write_output(&mmap_ev, mmap_ev.header.size); |
1a853e36 ACM |
326 | } |
327 | } | |
328 | ||
329 | fclose(fp); | |
330 | } | |
331 | ||
7c6a1c65 | 332 | static void synthesize_all(void) |
f70e87d7 PZ |
333 | { |
334 | DIR *proc; | |
335 | struct dirent dirent, *next; | |
336 | ||
337 | proc = opendir("/proc"); | |
338 | ||
339 | while (!readdir_r(proc, &dirent, &next) && next) { | |
340 | char *end; | |
2a8083f0 | 341 | pid_t pid, tgid; |
f70e87d7 PZ |
342 | |
343 | pid = strtol(dirent.d_name, &end, 10); | |
344 | if (*end) /* only interested in proper numerical dirents */ | |
345 | continue; | |
346 | ||
2a8083f0 ACM |
347 | tgid = pid_synthesize_comm_event(pid, 1); |
348 | pid_synthesize_mmap_samples(pid, tgid); | |
f70e87d7 PZ |
349 | } |
350 | ||
351 | closedir(proc); | |
352 | } | |
353 | ||
f250c030 IM |
354 | static int group_fd; |
355 | ||
7c6a1c65 PZ |
356 | static struct perf_header_attr *get_header_attr(struct perf_counter_attr *a, int nr) |
357 | { | |
358 | struct perf_header_attr *h_attr; | |
359 | ||
360 | if (nr < header->attrs) { | |
361 | h_attr = header->attr[nr]; | |
362 | } else { | |
363 | h_attr = perf_header_attr__new(a); | |
364 | perf_header__add_attr(header, h_attr); | |
365 | } | |
366 | ||
367 | return h_attr; | |
368 | } | |
369 | ||
f250c030 | 370 | static void create_counter(int counter, int cpu, pid_t pid) |
de9ac07b | 371 | { |
a21ca2ca | 372 | struct perf_counter_attr *attr = attrs + counter; |
7c6a1c65 PZ |
373 | struct perf_header_attr *h_attr; |
374 | int track = !counter; /* only the first counter needs these */ | |
375 | struct { | |
376 | u64 count; | |
377 | u64 time_enabled; | |
378 | u64 time_running; | |
379 | u64 id; | |
380 | } read_data; | |
381 | ||
382 | attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED | | |
383 | PERF_FORMAT_TOTAL_TIME_RUNNING | | |
384 | PERF_FORMAT_ID; | |
16c8a109 | 385 | |
3a9f131f | 386 | attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID; |
3efa1cc9 | 387 | |
1dba15e7 | 388 | if (freq) { |
ea1900e5 | 389 | attr->sample_type |= PERF_SAMPLE_PERIOD; |
a21ca2ca IM |
390 | attr->freq = 1; |
391 | attr->sample_freq = freq; | |
1dba15e7 | 392 | } |
3efa1cc9 | 393 | |
649c48a9 PZ |
394 | if (no_samples) |
395 | attr->sample_freq = 0; | |
396 | ||
397 | if (inherit_stat) | |
398 | attr->inherit_stat = 1; | |
399 | ||
4bba828d AB |
400 | if (sample_address) |
401 | attr->sample_type |= PERF_SAMPLE_ADDR; | |
402 | ||
3efa1cc9 IM |
403 | if (call_graph) |
404 | attr->sample_type |= PERF_SAMPLE_CALLCHAIN; | |
405 | ||
daac07b2 FW |
406 | if (raw_samples) |
407 | attr->sample_type |= PERF_SAMPLE_RAW; | |
f413cdb8 | 408 | |
a21ca2ca IM |
409 | attr->mmap = track; |
410 | attr->comm = track; | |
411 | attr->inherit = (cpu < 0) && inherit; | |
4502d77c | 412 | attr->disabled = 1; |
16c8a109 | 413 | |
3da297a6 | 414 | try_again: |
a21ca2ca | 415 | fd[nr_cpu][counter] = sys_perf_counter_open(attr, pid, cpu, group_fd, 0); |
16c8a109 | 416 | |
f250c030 IM |
417 | if (fd[nr_cpu][counter] < 0) { |
418 | int err = errno; | |
16c8a109 | 419 | |
f250c030 | 420 | if (err == EPERM) |
3da297a6 | 421 | die("Permission error - are you root?\n"); |
0a5ac846 JA |
422 | else if (err == ENODEV && profile_cpu != -1) |
423 | die("No such device - did you specify an out-of-range profile CPU?\n"); | |
3da297a6 IM |
424 | |
425 | /* | |
426 | * If it's cycles then fall back to hrtimer | |
427 | * based cpu-clock-tick sw counter, which | |
428 | * is always available even if no PMU support: | |
429 | */ | |
430 | if (attr->type == PERF_TYPE_HARDWARE | |
f4dbfa8f | 431 | && attr->config == PERF_COUNT_HW_CPU_CYCLES) { |
3da297a6 IM |
432 | |
433 | if (verbose) | |
434 | warning(" ... trying to fall back to cpu-clock-ticks\n"); | |
435 | attr->type = PERF_TYPE_SOFTWARE; | |
f4dbfa8f | 436 | attr->config = PERF_COUNT_SW_CPU_CLOCK; |
3da297a6 IM |
437 | goto try_again; |
438 | } | |
30c806a0 IM |
439 | printf("\n"); |
440 | error("perfcounter syscall returned with %d (%s)\n", | |
441 | fd[nr_cpu][counter], strerror(err)); | |
442 | die("No CONFIG_PERF_COUNTERS=y kernel support configured?\n"); | |
f250c030 IM |
443 | exit(-1); |
444 | } | |
3da297a6 | 445 | |
7c6a1c65 PZ |
446 | h_attr = get_header_attr(attr, counter); |
447 | ||
448 | if (!file_new) { | |
449 | if (memcmp(&h_attr->attr, attr, sizeof(*attr))) { | |
450 | fprintf(stderr, "incompatible append\n"); | |
451 | exit(-1); | |
452 | } | |
453 | } | |
454 | ||
3928ddbe FW |
455 | if (read(fd[nr_cpu][counter], &read_data, sizeof(read_data)) == -1) { |
456 | perror("Unable to read perf file descriptor\n"); | |
457 | exit(-1); | |
458 | } | |
7c6a1c65 PZ |
459 | |
460 | perf_header_attr__add_id(h_attr, read_data.id); | |
461 | ||
f250c030 IM |
462 | assert(fd[nr_cpu][counter] >= 0); |
463 | fcntl(fd[nr_cpu][counter], F_SETFL, O_NONBLOCK); | |
16c8a109 | 464 | |
f250c030 IM |
465 | /* |
466 | * First counter acts as the group leader: | |
467 | */ | |
468 | if (group && group_fd == -1) | |
469 | group_fd = fd[nr_cpu][counter]; | |
470 | ||
471 | event_array[nr_poll].fd = fd[nr_cpu][counter]; | |
472 | event_array[nr_poll].events = POLLIN; | |
473 | nr_poll++; | |
474 | ||
475 | mmap_array[nr_cpu][counter].counter = counter; | |
476 | mmap_array[nr_cpu][counter].prev = 0; | |
477 | mmap_array[nr_cpu][counter].mask = mmap_pages*page_size - 1; | |
478 | mmap_array[nr_cpu][counter].base = mmap(NULL, (mmap_pages+1)*page_size, | |
9d91a6f7 | 479 | PROT_READ|PROT_WRITE, MAP_SHARED, fd[nr_cpu][counter], 0); |
f250c030 IM |
480 | if (mmap_array[nr_cpu][counter].base == MAP_FAILED) { |
481 | error("failed to mmap with %d (%s)\n", errno, strerror(errno)); | |
482 | exit(-1); | |
483 | } | |
4502d77c PZ |
484 | |
485 | ioctl(fd[nr_cpu][counter], PERF_COUNTER_IOC_ENABLE); | |
f250c030 | 486 | } |
f2521b6e | 487 | |
f250c030 IM |
488 | static void open_counters(int cpu, pid_t pid) |
489 | { | |
490 | int counter; | |
16c8a109 | 491 | |
f250c030 IM |
492 | group_fd = -1; |
493 | for (counter = 0; counter < nr_counters; counter++) | |
494 | create_counter(counter, cpu, pid); | |
495 | ||
16c8a109 PZ |
496 | nr_cpu++; |
497 | } | |
498 | ||
f5970550 PZ |
499 | static void atexit_header(void) |
500 | { | |
7c6a1c65 | 501 | header->data_size += bytes_written; |
f5970550 | 502 | |
7c6a1c65 | 503 | perf_header__write(header, output); |
f5970550 PZ |
504 | } |
505 | ||
0e9b20b8 | 506 | static int __cmd_record(int argc, const char **argv) |
16c8a109 PZ |
507 | { |
508 | int i, counter; | |
abaff32a | 509 | struct stat st; |
7c6a1c65 | 510 | pid_t pid = 0; |
abaff32a | 511 | int flags; |
de9ac07b PZ |
512 | int ret; |
513 | ||
514 | page_size = sysconf(_SC_PAGE_SIZE); | |
de9ac07b PZ |
515 | nr_cpus = sysconf(_SC_NPROCESSORS_ONLN); |
516 | assert(nr_cpus <= MAX_NR_CPUS); | |
517 | assert(nr_cpus >= 0); | |
518 | ||
f5970550 PZ |
519 | atexit(sig_atexit); |
520 | signal(SIGCHLD, sig_handler); | |
521 | signal(SIGINT, sig_handler); | |
522 | ||
5f9c39dc FW |
523 | if (raw_samples) |
524 | read_tracing_data(); | |
525 | ||
266e0e21 PH |
526 | if (!stat(output_name, &st) && st.st_size) { |
527 | if (!force && !append_file) { | |
528 | fprintf(stderr, "Error, output file %s exists, use -A to append or -f to overwrite.\n", | |
529 | output_name); | |
530 | exit(-1); | |
531 | } | |
532 | } else { | |
533 | append_file = 0; | |
97124d5e PZ |
534 | } |
535 | ||
abaff32a IM |
536 | flags = O_CREAT|O_RDWR; |
537 | if (append_file) | |
f5970550 | 538 | file_new = 0; |
abaff32a IM |
539 | else |
540 | flags |= O_TRUNC; | |
541 | ||
542 | output = open(output_name, flags, S_IRUSR|S_IWUSR); | |
de9ac07b PZ |
543 | if (output < 0) { |
544 | perror("failed to create output file"); | |
545 | exit(-1); | |
546 | } | |
547 | ||
7c6a1c65 PZ |
548 | if (!file_new) |
549 | header = perf_header__read(output); | |
550 | else | |
551 | header = perf_header__new(); | |
f5970550 PZ |
552 | |
553 | atexit(atexit_header); | |
554 | ||
1a853e36 | 555 | if (!system_wide) { |
7c6a1c65 PZ |
556 | pid = target_pid; |
557 | if (pid == -1) | |
558 | pid = getpid(); | |
559 | ||
0a5ac846 JA |
560 | open_counters(profile_cpu, pid); |
561 | } else { | |
562 | if (profile_cpu != -1) { | |
563 | open_counters(profile_cpu, target_pid); | |
564 | } else { | |
565 | for (i = 0; i < nr_cpus; i++) | |
566 | open_counters(i, target_pid); | |
567 | } | |
568 | } | |
de9ac07b | 569 | |
7c6a1c65 PZ |
570 | if (file_new) |
571 | perf_header__write(header, output); | |
572 | ||
573 | if (!system_wide) { | |
2a8083f0 ACM |
574 | pid_t tgid = pid_synthesize_comm_event(pid, 0); |
575 | pid_synthesize_mmap_samples(pid, tgid); | |
7c6a1c65 PZ |
576 | } else |
577 | synthesize_all(); | |
578 | ||
ef65b2a0 | 579 | if (target_pid == -1 && argc) { |
1a853e36 ACM |
580 | pid = fork(); |
581 | if (pid < 0) | |
582 | perror("failed to fork"); | |
de9ac07b | 583 | |
1a853e36 | 584 | if (!pid) { |
0e9b20b8 | 585 | if (execvp(argv[0], (char **)argv)) { |
1a853e36 ACM |
586 | perror(argv[0]); |
587 | exit(-1); | |
588 | } | |
de9ac07b PZ |
589 | } |
590 | } | |
591 | ||
592 | if (realtime_prio) { | |
593 | struct sched_param param; | |
594 | ||
595 | param.sched_priority = realtime_prio; | |
596 | if (sched_setscheduler(0, SCHED_FIFO, ¶m)) { | |
597 | printf("Could not set realtime priority.\n"); | |
598 | exit(-1); | |
599 | } | |
600 | } | |
601 | ||
649c48a9 | 602 | for (;;) { |
2debbc83 | 603 | int hits = samples; |
de9ac07b | 604 | |
16c8a109 | 605 | for (i = 0; i < nr_cpu; i++) { |
de9ac07b PZ |
606 | for (counter = 0; counter < nr_counters; counter++) |
607 | mmap_read(&mmap_array[i][counter]); | |
608 | } | |
609 | ||
649c48a9 PZ |
610 | if (hits == samples) { |
611 | if (done) | |
612 | break; | |
de9ac07b | 613 | ret = poll(event_array, nr_poll, 100); |
649c48a9 | 614 | } |
de9ac07b PZ |
615 | } |
616 | ||
021e9f47 IM |
617 | /* |
618 | * Approximate RIP event size: 24 bytes. | |
619 | */ | |
620 | fprintf(stderr, | |
2debbc83 | 621 | "[ perf record: Captured and wrote %.3f MB %s (~%lld samples) ]\n", |
021e9f47 IM |
622 | (double)bytes_written / 1024.0 / 1024.0, |
623 | output_name, | |
624 | bytes_written / 24); | |
addc2785 | 625 | |
de9ac07b PZ |
626 | return 0; |
627 | } | |
0e9b20b8 | 628 | |
0e9b20b8 | 629 | static const char * const record_usage[] = { |
9e096753 MG |
630 | "perf record [<options>] [<command>]", |
631 | "perf record [<options>] -- <command> [<options>]", | |
0e9b20b8 IM |
632 | NULL |
633 | }; | |
634 | ||
5242519b | 635 | static const struct option options[] = { |
0e9b20b8 | 636 | OPT_CALLBACK('e', "event", NULL, "event", |
86847b62 TG |
637 | "event selector. use 'perf list' to list available events", |
638 | parse_events), | |
0e9b20b8 IM |
639 | OPT_INTEGER('p', "pid", &target_pid, |
640 | "record events on existing pid"), | |
641 | OPT_INTEGER('r', "realtime", &realtime_prio, | |
642 | "collect data with this RT SCHED_FIFO priority"), | |
daac07b2 FW |
643 | OPT_BOOLEAN('R', "raw-samples", &raw_samples, |
644 | "collect raw sample records from all opened counters"), | |
0e9b20b8 IM |
645 | OPT_BOOLEAN('a', "all-cpus", &system_wide, |
646 | "system-wide collection from all CPUs"), | |
abaff32a IM |
647 | OPT_BOOLEAN('A', "append", &append_file, |
648 | "append to the output file to do incremental profiling"), | |
0a5ac846 JA |
649 | OPT_INTEGER('C', "profile_cpu", &profile_cpu, |
650 | "CPU to profile on"), | |
97124d5e PZ |
651 | OPT_BOOLEAN('f', "force", &force, |
652 | "overwrite existing data file"), | |
e61078a0 | 653 | OPT_LONG('c', "count", &default_interval, |
abaff32a IM |
654 | "event period to sample"), |
655 | OPT_STRING('o', "output", &output_name, "file", | |
656 | "output file name"), | |
657 | OPT_BOOLEAN('i', "inherit", &inherit, | |
658 | "child tasks inherit counters"), | |
cf1f4574 IM |
659 | OPT_INTEGER('F', "freq", &freq, |
660 | "profile at this frequency"), | |
abaff32a IM |
661 | OPT_INTEGER('m', "mmap-pages", &mmap_pages, |
662 | "number of mmap data pages"), | |
3efa1cc9 IM |
663 | OPT_BOOLEAN('g', "call-graph", &call_graph, |
664 | "do call-graph (stack chain/backtrace) recording"), | |
3da297a6 IM |
665 | OPT_BOOLEAN('v', "verbose", &verbose, |
666 | "be more verbose (show counter open errors, etc)"), | |
649c48a9 PZ |
667 | OPT_BOOLEAN('s', "stat", &inherit_stat, |
668 | "per thread counts"), | |
4bba828d AB |
669 | OPT_BOOLEAN('d', "data", &sample_address, |
670 | "Sample addresses"), | |
649c48a9 PZ |
671 | OPT_BOOLEAN('n', "no-samples", &no_samples, |
672 | "don't sample"), | |
0e9b20b8 IM |
673 | OPT_END() |
674 | }; | |
675 | ||
f37a291c | 676 | int cmd_record(int argc, const char **argv, const char *prefix __used) |
0e9b20b8 IM |
677 | { |
678 | int counter; | |
679 | ||
a0541234 AB |
680 | argc = parse_options(argc, argv, options, record_usage, |
681 | PARSE_OPT_STOP_AT_NON_OPTION); | |
ef65b2a0 | 682 | if (!argc && target_pid == -1 && !system_wide) |
0e9b20b8 IM |
683 | usage_with_options(record_usage, options); |
684 | ||
bbd36e5e PZ |
685 | if (!nr_counters) { |
686 | nr_counters = 1; | |
687 | attrs[0].type = PERF_TYPE_HARDWARE; | |
688 | attrs[0].config = PERF_COUNT_HW_CPU_CYCLES; | |
689 | } | |
0e9b20b8 IM |
690 | |
691 | for (counter = 0; counter < nr_counters; counter++) { | |
a21ca2ca | 692 | if (attrs[counter].sample_period) |
0e9b20b8 IM |
693 | continue; |
694 | ||
a21ca2ca | 695 | attrs[counter].sample_period = default_interval; |
0e9b20b8 IM |
696 | } |
697 | ||
698 | return __cmd_record(argc, argv); | |
699 | } |