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[GitHub/mt8127/android_kernel_alcatel_ttab.git] / tools / perf / builtin-record.c
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
35 enum write_mode_t {
36 WRITE_FORCE,
37 WRITE_APPEND
38 };
39
40 static u64 user_interval = ULLONG_MAX;
41 static u64 default_interval = 0;
42
43 static unsigned int page_size;
44 static unsigned int mmap_pages = 128;
45 static unsigned int user_freq = UINT_MAX;
46 static int freq = 1000;
47 static int output;
48 static int pipe_output = 0;
49 static const char *output_name = NULL;
50 static int group = 0;
51 static int realtime_prio = 0;
52 static bool nodelay = false;
53 static bool raw_samples = false;
54 static bool sample_id_all_avail = true;
55 static bool system_wide = false;
56 static pid_t target_pid = -1;
57 static pid_t target_tid = -1;
58 static pid_t child_pid = -1;
59 static bool no_inherit = false;
60 static enum write_mode_t write_mode = WRITE_FORCE;
61 static bool call_graph = false;
62 static bool inherit_stat = false;
63 static bool no_samples = false;
64 static bool sample_address = false;
65 static bool sample_time = false;
66 static bool no_buildid = false;
67 static bool no_buildid_cache = false;
68 static struct perf_evlist *evsel_list;
69
70 static long samples = 0;
71 static u64 bytes_written = 0;
72
73 static int file_new = 1;
74 static off_t post_processing_offset;
75
76 static struct perf_session *session;
77 static const char *cpu_list;
78
79 static void advance_output(size_t size)
80 {
81 bytes_written += size;
82 }
83
84 static void write_output(void *buf, size_t size)
85 {
86 while (size) {
87 int ret = write(output, buf, size);
88
89 if (ret < 0)
90 die("failed to write");
91
92 size -= ret;
93 buf += ret;
94
95 bytes_written += ret;
96 }
97 }
98
99 static int process_synthesized_event(union perf_event *event,
100 struct perf_sample *sample __used,
101 struct perf_session *self __used)
102 {
103 write_output(event, event->header.size);
104 return 0;
105 }
106
107 static void mmap_read(struct perf_mmap *md)
108 {
109 unsigned int head = perf_mmap__read_head(md);
110 unsigned int old = md->prev;
111 unsigned char *data = md->base + page_size;
112 unsigned long size;
113 void *buf;
114
115 if (old == head)
116 return;
117
118 samples++;
119
120 size = head - old;
121
122 if ((old & md->mask) + size != (head & md->mask)) {
123 buf = &data[old & md->mask];
124 size = md->mask + 1 - (old & md->mask);
125 old += size;
126
127 write_output(buf, size);
128 }
129
130 buf = &data[old & md->mask];
131 size = head - old;
132 old += size;
133
134 write_output(buf, size);
135
136 md->prev = old;
137 perf_mmap__write_tail(md, old);
138 }
139
140 static volatile int done = 0;
141 static volatile int signr = -1;
142
143 static void sig_handler(int sig)
144 {
145 done = 1;
146 signr = sig;
147 }
148
149 static void sig_atexit(void)
150 {
151 if (child_pid > 0)
152 kill(child_pid, SIGTERM);
153
154 if (signr == -1 || signr == SIGUSR1)
155 return;
156
157 signal(signr, SIG_DFL);
158 kill(getpid(), signr);
159 }
160
161 static void config_attr(struct perf_evsel *evsel, struct perf_evlist *evlist)
162 {
163 struct perf_event_attr *attr = &evsel->attr;
164 int track = !evsel->idx; /* only the first counter needs these */
165
166 attr->read_format = PERF_FORMAT_TOTAL_TIME_ENABLED |
167 PERF_FORMAT_TOTAL_TIME_RUNNING |
168 PERF_FORMAT_ID;
169
170 attr->sample_type |= PERF_SAMPLE_IP | PERF_SAMPLE_TID;
171
172 if (evlist->nr_entries > 1)
173 attr->sample_type |= PERF_SAMPLE_ID;
174
175 /*
176 * We default some events to a 1 default interval. But keep
177 * it a weak assumption overridable by the user.
178 */
179 if (!attr->sample_period || (user_freq != UINT_MAX &&
180 user_interval != ULLONG_MAX)) {
181 if (freq) {
182 attr->sample_type |= PERF_SAMPLE_PERIOD;
183 attr->freq = 1;
184 attr->sample_freq = freq;
185 } else {
186 attr->sample_period = default_interval;
187 }
188 }
189
190 if (no_samples)
191 attr->sample_freq = 0;
192
193 if (inherit_stat)
194 attr->inherit_stat = 1;
195
196 if (sample_address) {
197 attr->sample_type |= PERF_SAMPLE_ADDR;
198 attr->mmap_data = track;
199 }
200
201 if (call_graph)
202 attr->sample_type |= PERF_SAMPLE_CALLCHAIN;
203
204 if (system_wide)
205 attr->sample_type |= PERF_SAMPLE_CPU;
206
207 if (sample_id_all_avail &&
208 (sample_time || system_wide || !no_inherit || cpu_list))
209 attr->sample_type |= PERF_SAMPLE_TIME;
210
211 if (raw_samples) {
212 attr->sample_type |= PERF_SAMPLE_TIME;
213 attr->sample_type |= PERF_SAMPLE_RAW;
214 attr->sample_type |= PERF_SAMPLE_CPU;
215 }
216
217 if (nodelay) {
218 attr->watermark = 0;
219 attr->wakeup_events = 1;
220 }
221
222 attr->mmap = track;
223 attr->comm = track;
224
225 if (target_pid == -1 && target_tid == -1 && !system_wide) {
226 attr->disabled = 1;
227 attr->enable_on_exec = 1;
228 }
229 }
230
231 static bool perf_evlist__equal(struct perf_evlist *evlist,
232 struct perf_evlist *other)
233 {
234 struct perf_evsel *pos, *pair;
235
236 if (evlist->nr_entries != other->nr_entries)
237 return false;
238
239 pair = list_entry(other->entries.next, struct perf_evsel, node);
240
241 list_for_each_entry(pos, &evlist->entries, node) {
242 if (memcmp(&pos->attr, &pair->attr, sizeof(pos->attr) != 0))
243 return false;
244 pair = list_entry(pair->node.next, struct perf_evsel, node);
245 }
246
247 return true;
248 }
249
250 static void open_counters(struct perf_evlist *evlist)
251 {
252 struct perf_evsel *pos;
253
254 list_for_each_entry(pos, &evlist->entries, node) {
255 struct perf_event_attr *attr = &pos->attr;
256 /*
257 * Check if parse_single_tracepoint_event has already asked for
258 * PERF_SAMPLE_TIME.
259 *
260 * XXX this is kludgy but short term fix for problems introduced by
261 * eac23d1c that broke 'perf script' by having different sample_types
262 * when using multiple tracepoint events when we use a perf binary
263 * that tries to use sample_id_all on an older kernel.
264 *
265 * We need to move counter creation to perf_session, support
266 * different sample_types, etc.
267 */
268 bool time_needed = attr->sample_type & PERF_SAMPLE_TIME;
269
270 config_attr(pos, evlist);
271 retry_sample_id:
272 attr->sample_id_all = sample_id_all_avail ? 1 : 0;
273 try_again:
274 if (perf_evsel__open(pos, evlist->cpus, evlist->threads, group,
275 !no_inherit) < 0) {
276 int err = errno;
277
278 if (err == EPERM || err == EACCES) {
279 ui__warning_paranoid();
280 exit(EXIT_FAILURE);
281 } else if (err == ENODEV && cpu_list) {
282 die("No such device - did you specify"
283 " an out-of-range profile CPU?\n");
284 } else if (err == EINVAL && sample_id_all_avail) {
285 /*
286 * Old kernel, no attr->sample_id_type_all field
287 */
288 sample_id_all_avail = false;
289 if (!sample_time && !raw_samples && !time_needed)
290 attr->sample_type &= ~PERF_SAMPLE_TIME;
291
292 goto retry_sample_id;
293 }
294
295 /*
296 * If it's cycles then fall back to hrtimer
297 * based cpu-clock-tick sw counter, which
298 * is always available even if no PMU support:
299 */
300 if (attr->type == PERF_TYPE_HARDWARE
301 && attr->config == PERF_COUNT_HW_CPU_CYCLES) {
302
303 if (verbose)
304 warning(" ... trying to fall back to cpu-clock-ticks\n");
305 attr->type = PERF_TYPE_SOFTWARE;
306 attr->config = PERF_COUNT_SW_CPU_CLOCK;
307 goto try_again;
308 }
309 printf("\n");
310 error("sys_perf_event_open() syscall returned with %d (%s). /bin/dmesg may provide additional information.\n",
311 err, strerror(err));
312
313 #if defined(__i386__) || defined(__x86_64__)
314 if (attr->type == PERF_TYPE_HARDWARE && err == EOPNOTSUPP)
315 die("No hardware sampling interrupt available."
316 " No APIC? If so then you can boot the kernel"
317 " with the \"lapic\" boot parameter to"
318 " force-enable it.\n");
319 #endif
320
321 die("No CONFIG_PERF_EVENTS=y kernel support configured?\n");
322 }
323 }
324
325 if (perf_evlist__set_filters(evlist)) {
326 error("failed to set filter with %d (%s)\n", errno,
327 strerror(errno));
328 exit(-1);
329 }
330
331 if (perf_evlist__mmap(evlist, mmap_pages, false) < 0)
332 die("failed to mmap with %d (%s)\n", errno, strerror(errno));
333
334 if (file_new)
335 session->evlist = evlist;
336 else {
337 if (!perf_evlist__equal(session->evlist, evlist)) {
338 fprintf(stderr, "incompatible append\n");
339 exit(-1);
340 }
341 }
342
343 perf_session__update_sample_type(session);
344 }
345
346 static int process_buildids(void)
347 {
348 u64 size = lseek(output, 0, SEEK_CUR);
349
350 if (size == 0)
351 return 0;
352
353 session->fd = output;
354 return __perf_session__process_events(session, post_processing_offset,
355 size - post_processing_offset,
356 size, &build_id__mark_dso_hit_ops);
357 }
358
359 static void atexit_header(void)
360 {
361 if (!pipe_output) {
362 session->header.data_size += bytes_written;
363
364 if (!no_buildid)
365 process_buildids();
366 perf_session__write_header(session, evsel_list, output, true);
367 perf_session__delete(session);
368 perf_evlist__delete(evsel_list);
369 symbol__exit();
370 }
371 }
372
373 static void perf_event__synthesize_guest_os(struct machine *machine, void *data)
374 {
375 int err;
376 struct perf_session *psession = data;
377
378 if (machine__is_host(machine))
379 return;
380
381 /*
382 *As for guest kernel when processing subcommand record&report,
383 *we arrange module mmap prior to guest kernel mmap and trigger
384 *a preload dso because default guest module symbols are loaded
385 *from guest kallsyms instead of /lib/modules/XXX/XXX. This
386 *method is used to avoid symbol missing when the first addr is
387 *in module instead of in guest kernel.
388 */
389 err = perf_event__synthesize_modules(process_synthesized_event,
390 psession, machine);
391 if (err < 0)
392 pr_err("Couldn't record guest kernel [%d]'s reference"
393 " relocation symbol.\n", machine->pid);
394
395 /*
396 * We use _stext for guest kernel because guest kernel's /proc/kallsyms
397 * have no _text sometimes.
398 */
399 err = perf_event__synthesize_kernel_mmap(process_synthesized_event,
400 psession, machine, "_text");
401 if (err < 0)
402 err = perf_event__synthesize_kernel_mmap(process_synthesized_event,
403 psession, machine,
404 "_stext");
405 if (err < 0)
406 pr_err("Couldn't record guest kernel [%d]'s reference"
407 " relocation symbol.\n", machine->pid);
408 }
409
410 static struct perf_event_header finished_round_event = {
411 .size = sizeof(struct perf_event_header),
412 .type = PERF_RECORD_FINISHED_ROUND,
413 };
414
415 static void mmap_read_all(void)
416 {
417 int i;
418
419 for (i = 0; i < evsel_list->cpus->nr; i++) {
420 if (evsel_list->mmap[i].base)
421 mmap_read(&evsel_list->mmap[i]);
422 }
423
424 if (perf_header__has_feat(&session->header, HEADER_TRACE_INFO))
425 write_output(&finished_round_event, sizeof(finished_round_event));
426 }
427
428 static int __cmd_record(int argc, const char **argv)
429 {
430 int i;
431 struct stat st;
432 int flags;
433 int err;
434 unsigned long waking = 0;
435 int child_ready_pipe[2], go_pipe[2];
436 const bool forks = argc > 0;
437 char buf;
438 struct machine *machine;
439
440 page_size = sysconf(_SC_PAGE_SIZE);
441
442 atexit(sig_atexit);
443 signal(SIGCHLD, sig_handler);
444 signal(SIGINT, sig_handler);
445 signal(SIGUSR1, sig_handler);
446
447 if (forks && (pipe(child_ready_pipe) < 0 || pipe(go_pipe) < 0)) {
448 perror("failed to create pipes");
449 exit(-1);
450 }
451
452 if (!output_name) {
453 if (!fstat(STDOUT_FILENO, &st) && S_ISFIFO(st.st_mode))
454 pipe_output = 1;
455 else
456 output_name = "perf.data";
457 }
458 if (output_name) {
459 if (!strcmp(output_name, "-"))
460 pipe_output = 1;
461 else if (!stat(output_name, &st) && st.st_size) {
462 if (write_mode == WRITE_FORCE) {
463 char oldname[PATH_MAX];
464 snprintf(oldname, sizeof(oldname), "%s.old",
465 output_name);
466 unlink(oldname);
467 rename(output_name, oldname);
468 }
469 } else if (write_mode == WRITE_APPEND) {
470 write_mode = WRITE_FORCE;
471 }
472 }
473
474 flags = O_CREAT|O_RDWR;
475 if (write_mode == WRITE_APPEND)
476 file_new = 0;
477 else
478 flags |= O_TRUNC;
479
480 if (pipe_output)
481 output = STDOUT_FILENO;
482 else
483 output = open(output_name, flags, S_IRUSR | S_IWUSR);
484 if (output < 0) {
485 perror("failed to create output file");
486 exit(-1);
487 }
488
489 session = perf_session__new(output_name, O_WRONLY,
490 write_mode == WRITE_FORCE, false, NULL);
491 if (session == NULL) {
492 pr_err("Not enough memory for reading perf file header\n");
493 return -1;
494 }
495
496 if (!no_buildid)
497 perf_header__set_feat(&session->header, HEADER_BUILD_ID);
498
499 if (!file_new) {
500 err = perf_session__read_header(session, output);
501 if (err < 0)
502 goto out_delete_session;
503 }
504
505 if (have_tracepoints(&evsel_list->entries))
506 perf_header__set_feat(&session->header, HEADER_TRACE_INFO);
507
508 if (forks) {
509 child_pid = fork();
510 if (child_pid < 0) {
511 perror("failed to fork");
512 exit(-1);
513 }
514
515 if (!child_pid) {
516 if (pipe_output)
517 dup2(2, 1);
518 close(child_ready_pipe[0]);
519 close(go_pipe[1]);
520 fcntl(go_pipe[0], F_SETFD, FD_CLOEXEC);
521
522 /*
523 * Do a dummy execvp to get the PLT entry resolved,
524 * so we avoid the resolver overhead on the real
525 * execvp call.
526 */
527 execvp("", (char **)argv);
528
529 /*
530 * Tell the parent we're ready to go
531 */
532 close(child_ready_pipe[1]);
533
534 /*
535 * Wait until the parent tells us to go.
536 */
537 if (read(go_pipe[0], &buf, 1) == -1)
538 perror("unable to read pipe");
539
540 execvp(argv[0], (char **)argv);
541
542 perror(argv[0]);
543 kill(getppid(), SIGUSR1);
544 exit(-1);
545 }
546
547 if (!system_wide && target_tid == -1 && target_pid == -1)
548 evsel_list->threads->map[0] = child_pid;
549
550 close(child_ready_pipe[1]);
551 close(go_pipe[0]);
552 /*
553 * wait for child to settle
554 */
555 if (read(child_ready_pipe[0], &buf, 1) == -1) {
556 perror("unable to read pipe");
557 exit(-1);
558 }
559 close(child_ready_pipe[0]);
560 }
561
562 open_counters(evsel_list);
563
564 /*
565 * perf_session__delete(session) will be called at atexit_header()
566 */
567 atexit(atexit_header);
568
569 if (pipe_output) {
570 err = perf_header__write_pipe(output);
571 if (err < 0)
572 return err;
573 } else if (file_new) {
574 err = perf_session__write_header(session, evsel_list,
575 output, false);
576 if (err < 0)
577 return err;
578 }
579
580 post_processing_offset = lseek(output, 0, SEEK_CUR);
581
582 if (pipe_output) {
583 err = perf_session__synthesize_attrs(session,
584 process_synthesized_event);
585 if (err < 0) {
586 pr_err("Couldn't synthesize attrs.\n");
587 return err;
588 }
589
590 err = perf_event__synthesize_event_types(process_synthesized_event,
591 session);
592 if (err < 0) {
593 pr_err("Couldn't synthesize event_types.\n");
594 return err;
595 }
596
597 if (have_tracepoints(&evsel_list->entries)) {
598 /*
599 * FIXME err <= 0 here actually means that
600 * there were no tracepoints so its not really
601 * an error, just that we don't need to
602 * synthesize anything. We really have to
603 * return this more properly and also
604 * propagate errors that now are calling die()
605 */
606 err = perf_event__synthesize_tracing_data(output, evsel_list,
607 process_synthesized_event,
608 session);
609 if (err <= 0) {
610 pr_err("Couldn't record tracing data.\n");
611 return err;
612 }
613 advance_output(err);
614 }
615 }
616
617 machine = perf_session__find_host_machine(session);
618 if (!machine) {
619 pr_err("Couldn't find native kernel information.\n");
620 return -1;
621 }
622
623 err = perf_event__synthesize_kernel_mmap(process_synthesized_event,
624 session, machine, "_text");
625 if (err < 0)
626 err = perf_event__synthesize_kernel_mmap(process_synthesized_event,
627 session, machine, "_stext");
628 if (err < 0)
629 pr_err("Couldn't record kernel reference relocation symbol\n"
630 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
631 "Check /proc/kallsyms permission or run as root.\n");
632
633 err = perf_event__synthesize_modules(process_synthesized_event,
634 session, machine);
635 if (err < 0)
636 pr_err("Couldn't record kernel module information.\n"
637 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
638 "Check /proc/modules permission or run as root.\n");
639
640 if (perf_guest)
641 perf_session__process_machines(session,
642 perf_event__synthesize_guest_os);
643
644 if (!system_wide)
645 perf_event__synthesize_thread_map(evsel_list->threads,
646 process_synthesized_event,
647 session);
648 else
649 perf_event__synthesize_threads(process_synthesized_event,
650 session);
651
652 if (realtime_prio) {
653 struct sched_param param;
654
655 param.sched_priority = realtime_prio;
656 if (sched_setscheduler(0, SCHED_FIFO, &param)) {
657 pr_err("Could not set realtime priority.\n");
658 exit(-1);
659 }
660 }
661
662 /*
663 * Let the child rip
664 */
665 if (forks)
666 close(go_pipe[1]);
667
668 for (;;) {
669 int hits = samples;
670 int thread;
671
672 mmap_read_all();
673
674 if (hits == samples) {
675 if (done)
676 break;
677 err = poll(evsel_list->pollfd, evsel_list->nr_fds, -1);
678 waking++;
679 }
680
681 if (done) {
682 for (i = 0; i < evsel_list->cpus->nr; i++) {
683 struct perf_evsel *pos;
684
685 list_for_each_entry(pos, &evsel_list->entries, node) {
686 for (thread = 0;
687 thread < evsel_list->threads->nr;
688 thread++)
689 ioctl(FD(pos, i, thread),
690 PERF_EVENT_IOC_DISABLE);
691 }
692 }
693 }
694 }
695
696 if (quiet || signr == SIGUSR1)
697 return 0;
698
699 fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking);
700
701 /*
702 * Approximate RIP event size: 24 bytes.
703 */
704 fprintf(stderr,
705 "[ perf record: Captured and wrote %.3f MB %s (~%" PRIu64 " samples) ]\n",
706 (double)bytes_written / 1024.0 / 1024.0,
707 output_name,
708 bytes_written / 24);
709
710 return 0;
711
712 out_delete_session:
713 perf_session__delete(session);
714 return err;
715 }
716
717 static const char * const record_usage[] = {
718 "perf record [<options>] [<command>]",
719 "perf record [<options>] -- <command> [<options>]",
720 NULL
721 };
722
723 static bool force, append_file;
724
725 const struct option record_options[] = {
726 OPT_CALLBACK('e', "event", &evsel_list, "event",
727 "event selector. use 'perf list' to list available events",
728 parse_events),
729 OPT_CALLBACK(0, "filter", &evsel_list, "filter",
730 "event filter", parse_filter),
731 OPT_INTEGER('p', "pid", &target_pid,
732 "record events on existing process id"),
733 OPT_INTEGER('t', "tid", &target_tid,
734 "record events on existing thread id"),
735 OPT_INTEGER('r', "realtime", &realtime_prio,
736 "collect data with this RT SCHED_FIFO priority"),
737 OPT_BOOLEAN('D', "no-delay", &nodelay,
738 "collect data without buffering"),
739 OPT_BOOLEAN('R', "raw-samples", &raw_samples,
740 "collect raw sample records from all opened counters"),
741 OPT_BOOLEAN('a', "all-cpus", &system_wide,
742 "system-wide collection from all CPUs"),
743 OPT_BOOLEAN('A', "append", &append_file,
744 "append to the output file to do incremental profiling"),
745 OPT_STRING('C', "cpu", &cpu_list, "cpu",
746 "list of cpus to monitor"),
747 OPT_BOOLEAN('f', "force", &force,
748 "overwrite existing data file (deprecated)"),
749 OPT_U64('c', "count", &user_interval, "event period to sample"),
750 OPT_STRING('o', "output", &output_name, "file",
751 "output file name"),
752 OPT_BOOLEAN('i', "no-inherit", &no_inherit,
753 "child tasks do not inherit counters"),
754 OPT_UINTEGER('F', "freq", &user_freq, "profile at this frequency"),
755 OPT_UINTEGER('m', "mmap-pages", &mmap_pages, "number of mmap data pages"),
756 OPT_BOOLEAN('g', "call-graph", &call_graph,
757 "do call-graph (stack chain/backtrace) recording"),
758 OPT_INCR('v', "verbose", &verbose,
759 "be more verbose (show counter open errors, etc)"),
760 OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"),
761 OPT_BOOLEAN('s', "stat", &inherit_stat,
762 "per thread counts"),
763 OPT_BOOLEAN('d', "data", &sample_address,
764 "Sample addresses"),
765 OPT_BOOLEAN('T', "timestamp", &sample_time, "Sample timestamps"),
766 OPT_BOOLEAN('n', "no-samples", &no_samples,
767 "don't sample"),
768 OPT_BOOLEAN('N', "no-buildid-cache", &no_buildid_cache,
769 "do not update the buildid cache"),
770 OPT_BOOLEAN('B', "no-buildid", &no_buildid,
771 "do not collect buildids in perf.data"),
772 OPT_CALLBACK('G', "cgroup", &evsel_list, "name",
773 "monitor event in cgroup name only",
774 parse_cgroups),
775 OPT_END()
776 };
777
778 int cmd_record(int argc, const char **argv, const char *prefix __used)
779 {
780 int err = -ENOMEM;
781 struct perf_evsel *pos;
782
783 evsel_list = perf_evlist__new(NULL, NULL);
784 if (evsel_list == NULL)
785 return -ENOMEM;
786
787 argc = parse_options(argc, argv, record_options, record_usage,
788 PARSE_OPT_STOP_AT_NON_OPTION);
789 if (!argc && target_pid == -1 && target_tid == -1 &&
790 !system_wide && !cpu_list)
791 usage_with_options(record_usage, record_options);
792
793 if (force && append_file) {
794 fprintf(stderr, "Can't overwrite and append at the same time."
795 " You need to choose between -f and -A");
796 usage_with_options(record_usage, record_options);
797 } else if (append_file) {
798 write_mode = WRITE_APPEND;
799 } else {
800 write_mode = WRITE_FORCE;
801 }
802
803 if (nr_cgroups && !system_wide) {
804 fprintf(stderr, "cgroup monitoring only available in"
805 " system-wide mode\n");
806 usage_with_options(record_usage, record_options);
807 }
808
809 symbol__init();
810
811 if (no_buildid_cache || no_buildid)
812 disable_buildid_cache();
813
814 if (evsel_list->nr_entries == 0 &&
815 perf_evlist__add_default(evsel_list) < 0) {
816 pr_err("Not enough memory for event selector list\n");
817 goto out_symbol_exit;
818 }
819
820 if (target_pid != -1)
821 target_tid = target_pid;
822
823 if (perf_evlist__create_maps(evsel_list, target_pid,
824 target_tid, cpu_list) < 0)
825 usage_with_options(record_usage, record_options);
826
827 list_for_each_entry(pos, &evsel_list->entries, node) {
828 if (perf_evsel__alloc_fd(pos, evsel_list->cpus->nr,
829 evsel_list->threads->nr) < 0)
830 goto out_free_fd;
831 if (perf_header__push_event(pos->attr.config, event_name(pos)))
832 goto out_free_fd;
833 }
834
835 if (perf_evlist__alloc_pollfd(evsel_list) < 0)
836 goto out_free_fd;
837
838 if (user_interval != ULLONG_MAX)
839 default_interval = user_interval;
840 if (user_freq != UINT_MAX)
841 freq = user_freq;
842
843 /*
844 * User specified count overrides default frequency.
845 */
846 if (default_interval)
847 freq = 0;
848 else if (freq) {
849 default_interval = freq;
850 } else {
851 fprintf(stderr, "frequency and count are zero, aborting\n");
852 err = -EINVAL;
853 goto out_free_fd;
854 }
855
856 err = __cmd_record(argc, argv);
857 out_free_fd:
858 perf_evlist__delete_maps(evsel_list);
859 out_symbol_exit:
860 symbol__exit();
861 return err;
862 }
kernel source for telekom puls (alcatel/mediatek)