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perf tools: Rename 'struct sample_data' to 'struct perf_sample'
[linux-2.6/btrfs-unstable.git] / tools / perf / builtin-record.c
blob5d3e4b32072bca18ac6469e3ed74219f9d29adb8
1 /*
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.
7 */
8 #define _FILE_OFFSET_BITS 64
9
10 #include "builtin.h"
11
12 #include "perf.h"
13
14 #include "util/build-id.h"
15 #include "util/util.h"
16 #include "util/parse-options.h"
17 #include "util/parse-events.h"
18
19 #include "util/header.h"
20 #include "util/event.h"
21 #include "util/evlist.h"
22 #include "util/evsel.h"
23 #include "util/debug.h"
24 #include "util/session.h"
25 #include "util/symbol.h"
26 #include "util/cpumap.h"
27 #include "util/thread_map.h"
28
29 #include <unistd.h>
30 #include <sched.h>
31 #include <sys/mman.h>
32
33 #define FD(e, x, y) (*(int *)xyarray__entry(e->fd, x, y))
34 #define SID(e, x, y) xyarray__entry(e->id, x, y)
35
36 enum write_mode_t {
37 WRITE_FORCE,
38 WRITE_APPEND
39 };
40
41 static u64 user_interval = ULLONG_MAX;
42 static u64 default_interval = 0;
43 static u64 sample_type;
44
45 static struct cpu_map *cpus;
46 static unsigned int page_size;
47 static unsigned int mmap_pages = 128;
48 static unsigned int user_freq = UINT_MAX;
49 static int freq = 1000;
50 static int output;
51 static int pipe_output = 0;
52 static const char *output_name = NULL;
53 static int group = 0;
54 static int realtime_prio = 0;
55 static bool nodelay = false;
56 static bool raw_samples = false;
57 static bool sample_id_all_avail = true;
58 static bool system_wide = false;
59 static pid_t target_pid = -1;
60 static pid_t target_tid = -1;
61 static struct thread_map *threads;
62 static pid_t child_pid = -1;
63 static bool no_inherit = false;
64 static enum write_mode_t write_mode = WRITE_FORCE;
65 static bool call_graph = false;
66 static bool inherit_stat = false;
67 static bool no_samples = false;
68 static bool sample_address = false;
69 static bool sample_time = false;
70 static bool no_buildid = false;
71 static bool no_buildid_cache = false;
72 static struct perf_evlist *evsel_list;
73
74 static long samples = 0;
75 static u64 bytes_written = 0;
76
77 static int file_new = 1;
78 static off_t post_processing_offset;
79
80 static struct perf_session *session;
81 static const char *cpu_list;
82
83 static void advance_output(size_t size)
84 {
85 bytes_written += size;
86 }
87
88 static void write_output(void *buf, size_t size)
89 {
90 while (size) {
91 int ret = write(output, buf, size);
92
93 if (ret < 0)
94 die("failed to write");
95
96 size -= ret;
97 buf += ret;
98
99 bytes_written += ret;
100 }
101 }
102
103 static int process_synthesized_event(event_t *event,
104 struct perf_sample *sample __used,
105 struct perf_session *self __used)
106 {
107 write_output(event, event->header.size);
108 return 0;
109 }
110
111 static void mmap_read(struct perf_mmap *md)
112 {
113 unsigned int head = perf_mmap__read_head(md);
114 unsigned int old = md->prev;
115 unsigned char *data = md->base + page_size;
116 unsigned long size;
117 void *buf;
118
119 if (old == head)
120 return;
121
122 samples++;
123
124 size = head - old;
125
126 if ((old & md->mask) + size != (head & md->mask)) {
127 buf = &data[old & md->mask];
128 size = md->mask + 1 - (old & md->mask);
129 old += size;
130
131 write_output(buf, size);
132 }
133
134 buf = &data[old & md->mask];
135 size = head - old;
136 old += size;
137
138 write_output(buf, size);
139
140 md->prev = old;
141 perf_mmap__write_tail(md, old);
142 }
143
144 static volatile int done = 0;
145 static volatile int signr = -1;
146
147 static void sig_handler(int sig)
148 {
149 done = 1;
150 signr = sig;
151 }
152
153 static void sig_atexit(void)
154 {
155 if (child_pid > 0)
156 kill(child_pid, SIGTERM);
157
158 if (signr == -1 || signr == SIGUSR1)
159 return;
160
161 signal(signr, SIG_DFL);
162 kill(getpid(), signr);
163 }
164
165 static struct perf_header_attr *get_header_attr(struct perf_event_attr *a, int nr)
166 {
167 struct perf_header_attr *h_attr;
168
169 if (nr < session->header.attrs) {
170 h_attr = session->header.attr[nr];
171 } else {
172 h_attr = perf_header_attr__new(a);
173 if (h_attr != NULL)
174 if (perf_header__add_attr(&session->header, h_attr) < 0) {
175 perf_header_attr__delete(h_attr);
176 h_attr = NULL;
177 }
178 }
179
180 return h_attr;
181 }
182
183 static void create_counter(struct perf_evsel *evsel, int cpu)
184 {
185 char *filter = evsel->filter;
186 struct perf_event_attr *attr = &evsel->attr;
187 struct perf_header_attr *h_attr;
188 struct perf_sample_id *sid;
189 int thread_index;
190 int ret;
191
192 for (thread_index = 0; thread_index < threads->nr; thread_index++) {
193 h_attr = get_header_attr(attr, evsel->idx);
194 if (h_attr == NULL)
195 die("nomem\n");
196
197 if (!file_new) {
198 if (memcmp(&h_attr->attr, attr, sizeof(*attr))) {
199 fprintf(stderr, "incompatible append\n");
200 exit(-1);
201 }
202 }
203
204 sid = SID(evsel, cpu, thread_index);
205 if (perf_header_attr__add_id(h_attr, sid->id) < 0) {
206 pr_warning("Not enough memory to add id\n");
207 exit(-1);
208 }
209
210 if (filter != NULL) {
211 ret = ioctl(FD(evsel, cpu, thread_index),
212 PERF_EVENT_IOC_SET_FILTER, filter);
213 if (ret) {
214 error("failed to set filter with %d (%s)\n", errno,
215 strerror(errno));
216 exit(-1);
217 }
218 }
219 }
220
221 if (!sample_type)
222 sample_type = attr->sample_type;
223 }
224
225 static void config_attr(struct perf_evsel *evsel, struct perf_evlist *evlist)
226 {
227 struct perf_event_attr *attr = &evsel->attr;
228 int track = !evsel->idx; /* only the first counter needs these */
229
230 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
231 PERF_FORMAT_TOTAL_TIME_RUNNING |
232 PERF_FORMAT_ID;
233
234 attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID;
235
236 if (evlist->nr_entries > 1)
237 attr->sample_type |= PERF_SAMPLE_ID;
238
239 /*
240 * We default some events to a 1 default interval. But keep
241 * it a weak assumption overridable by the user.
242 */
243 if (!attr->sample_period || (user_freq != UINT_MAX &&
244 user_interval != ULLONG_MAX)) {
245 if (freq) {
246 attr->sample_type |= PERF_SAMPLE_PERIOD;
247 attr->freq = 1;
248 attr->sample_freq = freq;
249 } else {
250 attr->sample_period = default_interval;
251 }
252 }
253
254 if (no_samples)
255 attr->sample_freq = 0;
256
257 if (inherit_stat)
258 attr->inherit_stat = 1;
259
260 if (sample_address) {
261 attr->sample_type |= PERF_SAMPLE_ADDR;
262 attr->mmap_data = track;
263 }
264
265 if (call_graph)
266 attr->sample_type |= PERF_SAMPLE_CALLCHAIN;
267
268 if (system_wide)
269 attr->sample_type |= PERF_SAMPLE_CPU;
270
271 if (sample_id_all_avail &&
272 (sample_time || system_wide || !no_inherit || cpu_list))
273 attr->sample_type |= PERF_SAMPLE_TIME;
274
275 if (raw_samples) {
276 attr->sample_type |= PERF_SAMPLE_TIME;
277 attr->sample_type |= PERF_SAMPLE_RAW;
278 attr->sample_type |= PERF_SAMPLE_CPU;
279 }
280
281 if (nodelay) {
282 attr->watermark = 0;
283 attr->wakeup_events = 1;
284 }
285
286 attr->mmap = track;
287 attr->comm = track;
288
289 if (target_pid == -1 && target_tid == -1 && !system_wide) {
290 attr->disabled = 1;
291 attr->enable_on_exec = 1;
292 }
293 }
294
295 static void open_counters(struct perf_evlist *evlist)
296 {
297 struct perf_evsel *pos;
298 int cpu;
299
300 list_for_each_entry(pos, &evlist->entries, node) {
301 struct perf_event_attr *attr = &pos->attr;
302 /*
303 * Check if parse_single_tracepoint_event has already asked for
304 * PERF_SAMPLE_TIME.
305 *
306 * XXX this is kludgy but short term fix for problems introduced by
307 * eac23d1c that broke 'perf script' by having different sample_types
308 * when using multiple tracepoint events when we use a perf binary
309 * that tries to use sample_id_all on an older kernel.
310 *
311 * We need to move counter creation to perf_session, support
312 * different sample_types, etc.
313 */
314 bool time_needed = attr->sample_type & PERF_SAMPLE_TIME;
315
316 config_attr(pos, evlist);
317 retry_sample_id:
318 attr->sample_id_all = sample_id_all_avail ? 1 : 0;
319 try_again:
320 if (perf_evsel__open(pos, cpus, threads, group, !no_inherit) < 0) {
321 int err = errno;
322
323 if (err == EPERM || err == EACCES)
324 die("Permission error - are you root?\n"
325 "\t Consider tweaking"
326 " /proc/sys/kernel/perf_event_paranoid.\n");
327 else if (err == ENODEV && cpu_list) {
328 die("No such device - did you specify"
329 " an out-of-range profile CPU?\n");
330 } else if (err == EINVAL && sample_id_all_avail) {
331 /*
332 * Old kernel, no attr->sample_id_type_all field
333 */
334 sample_id_all_avail = false;
335 if (!sample_time && !raw_samples && !time_needed)
336 attr->sample_type &= ~PERF_SAMPLE_TIME;
337
338 goto retry_sample_id;
339 }
340
341 /*
342 * If it's cycles then fall back to hrtimer
343 * based cpu-clock-tick sw counter, which
344 * is always available even if no PMU support:
345 */
346 if (attr->type == PERF_TYPE_HARDWARE
347 && attr->config == PERF_COUNT_HW_CPU_CYCLES) {
348
349 if (verbose)
350 warning(" ... trying to fall back to cpu-clock-ticks\n");
351 attr->type = PERF_TYPE_SOFTWARE;
352 attr->config = PERF_COUNT_SW_CPU_CLOCK;
353 goto try_again;
354 }
355 printf("\n");
356 error("sys_perf_event_open() syscall returned with %d (%s). /bin/dmesg may provide additional information.\n",
357 err, strerror(err));
358
359 #if defined(__i386__) || defined(__x86_64__)
360 if (attr->type == PERF_TYPE_HARDWARE && err == EOPNOTSUPP)
361 die("No hardware sampling interrupt available."
362 " No APIC? If so then you can boot the kernel"
363 " with the \"lapic\" boot parameter to"
364 " force-enable it.\n");
365 #endif
366
367 die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
368 }
369 }
370
371 if (perf_evlist__mmap(evlist, cpus, threads, mmap_pages, false) < 0)
372 die("failed to mmap with %d (%s)\n", errno, strerror(errno));
373
374 for (cpu = 0; cpu < cpus->nr; ++cpu) {
375 list_for_each_entry(pos, &evlist->entries, node)
376 create_counter(pos, cpu);
377 }
378 }
379
380 static int process_buildids(void)
381 {
382 u64 size = lseek(output, 0, SEEK_CUR);
383
384 if (size == 0)
385 return 0;
386
387 session->fd = output;
388 return __perf_session__process_events(session, post_processing_offset,
389 size - post_processing_offset,
390 size, &build_id__mark_dso_hit_ops);
391 }
392
393 static void atexit_header(void)
394 {
395 if (!pipe_output) {
396 session->header.data_size += bytes_written;
397
398 if (!no_buildid)
399 process_buildids();
400 perf_header__write(&session->header, evsel_list, output, true);
401 perf_session__delete(session);
402 perf_evlist__delete(evsel_list);
403 symbol__exit();
404 }
405 }
406
407 static void event__synthesize_guest_os(struct machine *machine, void *data)
408 {
409 int err;
410 struct perf_session *psession = data;
411
412 if (machine__is_host(machine))
413 return;
414
415 /*
416 *As for guest kernel when processing subcommand record&report,
417 *we arrange module mmap prior to guest kernel mmap and trigger
418 *a preload dso because default guest module symbols are loaded
419 *from guest kallsyms instead of /lib/modules/XXX/XXX. This
420 *method is used to avoid symbol missing when the first addr is
421 *in module instead of in guest kernel.
422 */
423 err = event__synthesize_modules(process_synthesized_event,
424 psession, machine);
425 if (err < 0)
426 pr_err("Couldn't record guest kernel [%d]'s reference"
427 " relocation symbol.\n", machine->pid);
428
429 /*
430 * We use _stext for guest kernel because guest kernel's /proc/kallsyms
431 * have no _text sometimes.
432 */
433 err = event__synthesize_kernel_mmap(process_synthesized_event,
434 psession, machine, "_text");
435 if (err < 0)
436 err = event__synthesize_kernel_mmap(process_synthesized_event,
437 psession, machine, "_stext");
438 if (err < 0)
439 pr_err("Couldn't record guest kernel [%d]'s reference"
440 " relocation symbol.\n", machine->pid);
441 }
442
443 static struct perf_event_header finished_round_event = {
444 .size = sizeof(struct perf_event_header),
445 .type = PERF_RECORD_FINISHED_ROUND,
446 };
447
448 static void mmap_read_all(void)
449 {
450 int i;
451
452 for (i = 0; i < cpus->nr; i++) {
453 if (evsel_list->mmap[i].base)
454 mmap_read(&evsel_list->mmap[i]);
455 }
456
457 if (perf_header__has_feat(&session->header, HEADER_TRACE_INFO))
458 write_output(&finished_round_event, sizeof(finished_round_event));
459 }
460
461 static int __cmd_record(int argc, const char **argv)
462 {
463 int i;
464 struct stat st;
465 int flags;
466 int err;
467 unsigned long waking = 0;
468 int child_ready_pipe[2], go_pipe[2];
469 const bool forks = argc > 0;
470 char buf;
471 struct machine *machine;
472
473 page_size = sysconf(_SC_PAGE_SIZE);
474
475 atexit(sig_atexit);
476 signal(SIGCHLD, sig_handler);
477 signal(SIGINT, sig_handler);
478 signal(SIGUSR1, sig_handler);
479
480 if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
481 perror("failed to create pipes");
482 exit(-1);
483 }
484
485 if (!output_name) {
486 if (!fstat(STDOUT_FILENO, &st) && S_ISFIFO(st.st_mode))
487 pipe_output = 1;
488 else
489 output_name = "perf.data";
490 }
491 if (output_name) {
492 if (!strcmp(output_name, "-"))
493 pipe_output = 1;
494 else if (!stat(output_name, &st) && st.st_size) {
495 if (write_mode == WRITE_FORCE) {
496 char oldname[PATH_MAX];
497 snprintf(oldname, sizeof(oldname), "%s.old",
498 output_name);
499 unlink(oldname);
500 rename(output_name, oldname);
501 }
502 } else if (write_mode == WRITE_APPEND) {
503 write_mode = WRITE_FORCE;
504 }
505 }
506
507 flags = O_CREAT|O_RDWR;
508 if (write_mode == WRITE_APPEND)
509 file_new = 0;
510 else
511 flags |= O_TRUNC;
512
513 if (pipe_output)
514 output = STDOUT_FILENO;
515 else
516 output = open(output_name, flags, S_IRUSR | S_IWUSR);
517 if (output < 0) {
518 perror("failed to create output file");
519 exit(-1);
520 }
521
522 session = perf_session__new(output_name, O_WRONLY,
523 write_mode == WRITE_FORCE, false, NULL);
524 if (session == NULL) {
525 pr_err("Not enough memory for reading perf file header\n");
526 return -1;
527 }
528
529 if (!no_buildid)
530 perf_header__set_feat(&session->header, HEADER_BUILD_ID);
531
532 if (!file_new) {
533 err = perf_header__read(session, output);
534 if (err < 0)
535 goto out_delete_session;
536 }
537
538 if (have_tracepoints(&evsel_list->entries))
539 perf_header__set_feat(&session->header, HEADER_TRACE_INFO);
540
541 /*
542 * perf_session__delete(session) will be called at atexit_header()
543 */
544 atexit(atexit_header);
545
546 if (forks) {
547 child_pid = fork();
548 if (child_pid < 0) {
549 perror("failed to fork");
550 exit(-1);
551 }
552
553 if (!child_pid) {
554 if (pipe_output)
555 dup2(2, 1);
556 close(child_ready_pipe[0]);
557 close(go_pipe[1]);
558 fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
559
560 /*
561 * Do a dummy execvp to get the PLT entry resolved,
562 * so we avoid the resolver overhead on the real
563 * execvp call.
564 */
565 execvp("", (char **)argv);
566
567 /*
568 * Tell the parent we're ready to go
569 */
570 close(child_ready_pipe[1]);
571
572 /*
573 * Wait until the parent tells us to go.
574 */
575 if (read(go_pipe[0], &buf, 1) == -1)
576 perror("unable to read pipe");
577
578 execvp(argv[0], (char **)argv);
579
580 perror(argv[0]);
581 kill(getppid(), SIGUSR1);
582 exit(-1);
583 }
584
585 if (!system_wide && target_tid == -1 && target_pid == -1)
586 threads->map[0] = child_pid;
587
588 close(child_ready_pipe[1]);
589 close(go_pipe[0]);
590 /*
591 * wait for child to settle
592 */
593 if (read(child_ready_pipe[0], &buf, 1) == -1) {
594 perror("unable to read pipe");
595 exit(-1);
596 }
597 close(child_ready_pipe[0]);
598 }
599
600 open_counters(evsel_list);
601
602 perf_session__set_sample_type(session, sample_type);
603
604 if (pipe_output) {
605 err = perf_header__write_pipe(output);
606 if (err < 0)
607 return err;
608 } else if (file_new) {
609 err = perf_header__write(&session->header, evsel_list,
610 output, false);
611 if (err < 0)
612 return err;
613 }
614
615 post_processing_offset = lseek(output, 0, SEEK_CUR);
616
617 perf_session__set_sample_id_all(session, sample_id_all_avail);
618
619 if (pipe_output) {
620 err = event__synthesize_attrs(&session->header,
621 process_synthesized_event,
622 session);
623 if (err < 0) {
624 pr_err("Couldn't synthesize attrs.\n");
625 return err;
626 }
627
628 err = event__synthesize_event_types(process_synthesized_event,
629 session);
630 if (err < 0) {
631 pr_err("Couldn't synthesize event_types.\n");
632 return err;
633 }
634
635 if (have_tracepoints(&evsel_list->entries)) {
636 /*
637 * FIXME err <= 0 here actually means that
638 * there were no tracepoints so its not really
639 * an error, just that we don't need to
640 * synthesize anything. We really have to
641 * return this more properly and also
642 * propagate errors that now are calling die()
643 */
644 err = event__synthesize_tracing_data(output, evsel_list,
645 process_synthesized_event,
646 session);
647 if (err <= 0) {
648 pr_err("Couldn't record tracing data.\n");
649 return err;
650 }
651 advance_output(err);
652 }
653 }
654
655 machine = perf_session__find_host_machine(session);
656 if (!machine) {
657 pr_err("Couldn't find native kernel information.\n");
658 return -1;
659 }
660
661 err = event__synthesize_kernel_mmap(process_synthesized_event,
662 session, machine, "_text");
663 if (err < 0)
664 err = event__synthesize_kernel_mmap(process_synthesized_event,
665 session, machine, "_stext");
666 if (err < 0)
667 pr_err("Couldn't record kernel reference relocation symbol\n"
668 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
669 "Check /proc/kallsyms permission or run as root.\n");
670
671 err = event__synthesize_modules(process_synthesized_event,
672 session, machine);
673 if (err < 0)
674 pr_err("Couldn't record kernel module information.\n"
675 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
676 "Check /proc/modules permission or run as root.\n");
677
678 if (perf_guest)
679 perf_session__process_machines(session, event__synthesize_guest_os);
680
681 if (!system_wide)
682 event__synthesize_thread(target_tid, process_synthesized_event,
683 session);
684 else
685 event__synthesize_threads(process_synthesized_event, session);
686
687 if (realtime_prio) {
688 struct sched_param param;
689
690 param.sched_priority = realtime_prio;
691 if (sched_setscheduler(0, SCHED_FIFO, &param)) {
692 pr_err("Could not set realtime priority.\n");
693 exit(-1);
694 }
695 }
696
697 /*
698 * Let the child rip
699 */
700 if (forks)
701 close(go_pipe[1]);
702
703 for (;;) {
704 int hits = samples;
705 int thread;
706
707 mmap_read_all();
708
709 if (hits == samples) {
710 if (done)
711 break;
712 err = poll(evsel_list->pollfd, evsel_list->nr_fds, -1);
713 waking++;
714 }
715
716 if (done) {
717 for (i = 0; i < cpus->nr; i++) {
718 struct perf_evsel *pos;
719
720 list_for_each_entry(pos, &evsel_list->entries, node) {
721 for (thread = 0;
722 thread < threads->nr;
723 thread++)
724 ioctl(FD(pos, i, thread),
725 PERF_EVENT_IOC_DISABLE);
726 }
727 }
728 }
729 }
730
731 if (quiet || signr == SIGUSR1)
732 return 0;
733
734 fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking);
735
736 /*
737 * Approximate RIP event size: 24 bytes.
738 */
739 fprintf(stderr,
740 "[ perf record: Captured and wrote %.3f MB %s (~%" PRIu64 " samples) ]\n",
741 (double)bytes_written / 1024.0 / 1024.0,
742 output_name,
743 bytes_written / 24);
744
745 return 0;
746
747 out_delete_session:
748 perf_session__delete(session);
749 return err;
750 }
751
752 static const char * const record_usage[] = {
753 "perf record [<options>] [<command>]",
754 "perf record [<options>] -- <command> [<options>]",
755 NULL
756 };
757
758 static bool force, append_file;
759
760 const struct option record_options[] = {
761 OPT_CALLBACK('e', "event", &evsel_list, "event",
762 "event selector. use 'perf list' to list available events",
763 parse_events),
764 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
765 "event filter", parse_filter),
766 OPT_INTEGER('p', "pid", &target_pid,
767 "record events on existing process id"),
768 OPT_INTEGER('t', "tid", &target_tid,
769 "record events on existing thread id"),
770 OPT_INTEGER('r', "realtime", &realtime_prio,
771 "collect data with this RT SCHED_FIFO priority"),
772 OPT_BOOLEAN('D', "no-delay", &nodelay,
773 "collect data without buffering"),
774 OPT_BOOLEAN('R', "raw-samples", &raw_samples,
775 "collect raw sample records from all opened counters"),
776 OPT_BOOLEAN('a', "all-cpus", &system_wide,
777 "system-wide collection from all CPUs"),
778 OPT_BOOLEAN('A', "append", &append_file,
779 "append to the output file to do incremental profiling"),
780 OPT_STRING('C', "cpu", &cpu_list, "cpu",
781 "list of cpus to monitor"),
782 OPT_BOOLEAN('f', "force", &force,
783 "overwrite existing data file (deprecated)"),
784 OPT_U64('c', "count", &user_interval, "event period to sample"),
785 OPT_STRING('o', "output", &output_name, "file",
786 "output file name"),
787 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
788 "child tasks do not inherit counters"),
789 OPT_UINTEGER('F', "freq", &user_freq, "profile at this frequency"),
790 OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"),
791 OPT_BOOLEAN('g', "call-graph", &call_graph,
792 "do call-graph (stack chain/backtrace) recording"),
793 OPT_INCR('v', "verbose", &verbose,
794 "be more verbose (show counter open errors, etc)"),
795 OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"),
796 OPT_BOOLEAN('s', "stat", &inherit_stat,
797 "per thread counts"),
798 OPT_BOOLEAN('d', "data", &sample_address,
799 "Sample addresses"),
800 OPT_BOOLEAN('T', "timestamp", &sample_time, "Sample timestamps"),
801 OPT_BOOLEAN('n', "no-samples", &no_samples,
802 "don't sample"),
803 OPT_BOOLEAN('N', "no-buildid-cache", &no_buildid_cache,
804 "do not update the buildid cache"),
805 OPT_BOOLEAN('B', "no-buildid", &no_buildid,
806 "do not collect buildids in perf.data"),
807 OPT_END()
808 };
809
810 int cmd_record(int argc, const char **argv, const char *prefix __used)
811 {
812 int err = -ENOMEM;
813 struct perf_evsel *pos;
814
815 evsel_list = perf_evlist__new();
816 if (evsel_list == NULL)
817 return -ENOMEM;
818
819 argc = parse_options(argc, argv, record_options, record_usage,
820 PARSE_OPT_STOP_AT_NON_OPTION);
821 if (!argc && target_pid == -1 && target_tid == -1 &&
822 !system_wide && !cpu_list)
823 usage_with_options(record_usage, record_options);
824
825 if (force && append_file) {
826 fprintf(stderr, "Can't overwrite and append at the same time."
827 " You need to choose between -f and -A");
828 usage_with_options(record_usage, record_options);
829 } else if (append_file) {
830 write_mode = WRITE_APPEND;
831 } else {
832 write_mode = WRITE_FORCE;
833 }
834
835 symbol__init();
836
837 if (no_buildid_cache || no_buildid)
838 disable_buildid_cache();
839
840 if (evsel_list->nr_entries == 0 &&
841 perf_evlist__add_default(evsel_list) < 0) {
842 pr_err("Not enough memory for event selector list\n");
843 goto out_symbol_exit;
844 }
845
846 if (target_pid != -1)
847 target_tid = target_pid;
848
849 threads = thread_map__new(target_pid, target_tid);
850 if (threads == NULL) {
851 pr_err("Problems finding threads of monitor\n");
852 usage_with_options(record_usage, record_options);
853 }
854
855 if (target_tid != -1)
856 cpus = cpu_map__dummy_new();
857 else
858 cpus = cpu_map__new(cpu_list);
859
860 if (cpus == NULL)
861 usage_with_options(record_usage, record_options);
862
863 list_for_each_entry(pos, &evsel_list->entries, node) {
864 if (perf_evsel__alloc_fd(pos, cpus->nr, threads->nr) < 0)
865 goto out_free_fd;
866 if (perf_header__push_event(pos->attr.config, event_name(pos)))
867 goto out_free_fd;
868 }
869
870 if (perf_evlist__alloc_pollfd(evsel_list, cpus->nr, threads->nr) < 0)
871 goto out_free_fd;
872
873 if (user_interval != ULLONG_MAX)
874 default_interval = user_interval;
875 if (user_freq != UINT_MAX)
876 freq = user_freq;
877
878 /*
879 * User specified count overrides default frequency.
880 */
881 if (default_interval)
882 freq = 0;
883 else if (freq) {
884 default_interval = freq;
885 } else {
886 fprintf(stderr, "frequency and count are zero, aborting\n");
887 err = -EINVAL;
888 goto out_free_fd;
889 }
890
891 err = __cmd_record(argc, argv);
892
893 out_free_fd:
894 thread_map__delete(threads);
895 threads = NULL;
896 out_symbol_exit:
897 symbol__exit();
898 return err;
899 }
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