1 // SPDX-License-Identifier: GPL-2.0
5 * Builtin record command: Record the profile of a workload
6 * (or a CPU, or a PID) into the perf.data output file - for
7 * later analysis via perf report.
13 #include "util/build-id.h"
14 #include "util/util.h"
15 #include <subcmd/parse-options.h>
16 #include "util/parse-events.h"
17 #include "util/config.h"
19 #include "util/callchain.h"
20 #include "util/cgroup.h"
21 #include "util/header.h"
22 #include "util/event.h"
23 #include "util/evlist.h"
24 #include "util/evsel.h"
25 #include "util/debug.h"
26 #include "util/drv_configs.h"
27 #include "util/session.h"
28 #include "util/tool.h"
29 #include "util/symbol.h"
30 #include "util/cpumap.h"
31 #include "util/thread_map.h"
32 #include "util/data.h"
33 #include "util/perf_regs.h"
34 #include "util/auxtrace.h"
36 #include "util/parse-branch-options.h"
37 #include "util/parse-regs-options.h"
38 #include "util/llvm-utils.h"
39 #include "util/bpf-loader.h"
40 #include "util/trigger.h"
41 #include "util/perf-hooks.h"
42 #include "util/time-utils.h"
43 #include "util/units.h"
55 #include <linux/time64.h>
57 struct switch_output {
67 struct perf_tool tool;
68 struct record_opts opts;
70 struct perf_data_file file;
71 struct auxtrace_record *itr;
72 struct perf_evlist *evlist;
73 struct perf_session *session;
78 bool no_buildid_cache;
79 bool no_buildid_cache_set;
81 bool timestamp_filename;
82 struct switch_output switch_output;
83 unsigned long long samples;
86 static volatile int auxtrace_record__snapshot_started;
87 static DEFINE_TRIGGER(auxtrace_snapshot_trigger);
88 static DEFINE_TRIGGER(switch_output_trigger);
90 static bool switch_output_signal(struct record *rec)
92 return rec->switch_output.signal &&
93 trigger_is_ready(&switch_output_trigger);
96 static bool switch_output_size(struct record *rec)
98 return rec->switch_output.size &&
99 trigger_is_ready(&switch_output_trigger) &&
100 (rec->bytes_written >= rec->switch_output.size);
103 static bool switch_output_time(struct record *rec)
105 return rec->switch_output.time &&
106 trigger_is_ready(&switch_output_trigger);
109 static int record__write(struct record *rec, void *bf, size_t size)
111 if (perf_data_file__write(rec->session->file, bf, size) < 0) {
112 pr_err("failed to write perf data, error: %m\n");
116 rec->bytes_written += size;
118 if (switch_output_size(rec))
119 trigger_hit(&switch_output_trigger);
124 static int process_synthesized_event(struct perf_tool *tool,
125 union perf_event *event,
126 struct perf_sample *sample __maybe_unused,
127 struct machine *machine __maybe_unused)
129 struct record *rec = container_of(tool, struct record, tool);
130 return record__write(rec, event, event->header.size);
134 backward_rb_find_range(void *buf, int mask, u64 head, u64 *start, u64 *end)
136 struct perf_event_header *pheader;
140 pr_debug2("backward_rb_find_range: buf=%p, head=%"PRIx64"\n", buf, head);
141 pheader = (struct perf_event_header *)(buf + (head & mask));
144 if (evt_head - head >= (unsigned int)size) {
145 pr_debug("Finished reading backward ring buffer: rewind\n");
146 if (evt_head - head > (unsigned int)size)
147 evt_head -= pheader->size;
152 pheader = (struct perf_event_header *)(buf + (evt_head & mask));
154 if (pheader->size == 0) {
155 pr_debug("Finished reading backward ring buffer: get start\n");
160 evt_head += pheader->size;
161 pr_debug3("move evt_head: %"PRIx64"\n", evt_head);
163 WARN_ONCE(1, "Shouldn't get here\n");
168 rb_find_range(void *data, int mask, u64 head, u64 old,
169 u64 *start, u64 *end, bool backward)
177 return backward_rb_find_range(data, mask, head, start, end);
181 record__mmap_read(struct record *rec, struct perf_mmap *md,
182 bool overwrite, bool backward)
184 u64 head = perf_mmap__read_head(md);
186 u64 end = head, start = old;
187 unsigned char *data = md->base + page_size;
192 if (rb_find_range(data, md->mask, head,
193 old, &start, &end, backward))
202 if (size > (unsigned long)(md->mask) + 1) {
203 WARN_ONCE(1, "failed to keep up with mmap data. (warn only once)\n");
206 perf_mmap__consume(md, overwrite || backward);
210 if ((start & md->mask) + size != (end & md->mask)) {
211 buf = &data[start & md->mask];
212 size = md->mask + 1 - (start & md->mask);
215 if (record__write(rec, buf, size) < 0) {
221 buf = &data[start & md->mask];
225 if (record__write(rec, buf, size) < 0) {
231 perf_mmap__consume(md, overwrite || backward);
236 static volatile int done;
237 static volatile int signr = -1;
238 static volatile int child_finished;
240 static void sig_handler(int sig)
250 static void sigsegv_handler(int sig)
252 perf_hooks__recover();
253 sighandler_dump_stack(sig);
256 static void record__sig_exit(void)
261 signal(signr, SIG_DFL);
265 #ifdef HAVE_AUXTRACE_SUPPORT
267 static int record__process_auxtrace(struct perf_tool *tool,
268 union perf_event *event, void *data1,
269 size_t len1, void *data2, size_t len2)
271 struct record *rec = container_of(tool, struct record, tool);
272 struct perf_data_file *file = &rec->file;
276 if (!perf_data_file__is_pipe(file)) {
278 int fd = perf_data_file__fd(file);
281 file_offset = lseek(fd, 0, SEEK_CUR);
282 if (file_offset == -1)
284 err = auxtrace_index__auxtrace_event(&rec->session->auxtrace_index,
290 /* event.auxtrace.size includes padding, see __auxtrace_mmap__read() */
291 padding = (len1 + len2) & 7;
293 padding = 8 - padding;
295 record__write(rec, event, event->header.size);
296 record__write(rec, data1, len1);
298 record__write(rec, data2, len2);
299 record__write(rec, &pad, padding);
304 static int record__auxtrace_mmap_read(struct record *rec,
305 struct auxtrace_mmap *mm)
309 ret = auxtrace_mmap__read(mm, rec->itr, &rec->tool,
310 record__process_auxtrace);
320 static int record__auxtrace_mmap_read_snapshot(struct record *rec,
321 struct auxtrace_mmap *mm)
325 ret = auxtrace_mmap__read_snapshot(mm, rec->itr, &rec->tool,
326 record__process_auxtrace,
327 rec->opts.auxtrace_snapshot_size);
337 static int record__auxtrace_read_snapshot_all(struct record *rec)
342 for (i = 0; i < rec->evlist->nr_mmaps; i++) {
343 struct auxtrace_mmap *mm =
344 &rec->evlist->mmap[i].auxtrace_mmap;
349 if (record__auxtrace_mmap_read_snapshot(rec, mm) != 0) {
358 static void record__read_auxtrace_snapshot(struct record *rec)
360 pr_debug("Recording AUX area tracing snapshot\n");
361 if (record__auxtrace_read_snapshot_all(rec) < 0) {
362 trigger_error(&auxtrace_snapshot_trigger);
364 if (auxtrace_record__snapshot_finish(rec->itr))
365 trigger_error(&auxtrace_snapshot_trigger);
367 trigger_ready(&auxtrace_snapshot_trigger);
374 int record__auxtrace_mmap_read(struct record *rec __maybe_unused,
375 struct auxtrace_mmap *mm __maybe_unused)
381 void record__read_auxtrace_snapshot(struct record *rec __maybe_unused)
386 int auxtrace_record__snapshot_start(struct auxtrace_record *itr __maybe_unused)
393 static int record__mmap_evlist(struct record *rec,
394 struct perf_evlist *evlist)
396 struct record_opts *opts = &rec->opts;
399 if (perf_evlist__mmap_ex(evlist, opts->mmap_pages, false,
400 opts->auxtrace_mmap_pages,
401 opts->auxtrace_snapshot_mode) < 0) {
402 if (errno == EPERM) {
403 pr_err("Permission error mapping pages.\n"
404 "Consider increasing "
405 "/proc/sys/kernel/perf_event_mlock_kb,\n"
406 "or try again with a smaller value of -m/--mmap_pages.\n"
407 "(current value: %u,%u)\n",
408 opts->mmap_pages, opts->auxtrace_mmap_pages);
411 pr_err("failed to mmap with %d (%s)\n", errno,
412 str_error_r(errno, msg, sizeof(msg)));
422 static int record__mmap(struct record *rec)
424 return record__mmap_evlist(rec, rec->evlist);
427 static int record__open(struct record *rec)
430 struct perf_evsel *pos;
431 struct perf_evlist *evlist = rec->evlist;
432 struct perf_session *session = rec->session;
433 struct record_opts *opts = &rec->opts;
434 struct perf_evsel_config_term *err_term;
437 perf_evlist__config(evlist, opts, &callchain_param);
439 evlist__for_each_entry(evlist, pos) {
441 if (perf_evsel__open(pos, pos->cpus, pos->threads) < 0) {
442 if (perf_evsel__fallback(pos, errno, msg, sizeof(msg))) {
444 ui__warning("%s\n", msg);
449 perf_evsel__open_strerror(pos, &opts->target,
450 errno, msg, sizeof(msg));
451 ui__error("%s\n", msg);
456 if (perf_evlist__apply_filters(evlist, &pos)) {
457 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
458 pos->filter, perf_evsel__name(pos), errno,
459 str_error_r(errno, msg, sizeof(msg)));
464 if (perf_evlist__apply_drv_configs(evlist, &pos, &err_term)) {
465 pr_err("failed to set config \"%s\" on event %s with %d (%s)\n",
466 err_term->val.drv_cfg, perf_evsel__name(pos), errno,
467 str_error_r(errno, msg, sizeof(msg)));
472 rc = record__mmap(rec);
476 session->evlist = evlist;
477 perf_session__set_id_hdr_size(session);
482 static int process_sample_event(struct perf_tool *tool,
483 union perf_event *event,
484 struct perf_sample *sample,
485 struct perf_evsel *evsel,
486 struct machine *machine)
488 struct record *rec = container_of(tool, struct record, tool);
492 return build_id__mark_dso_hit(tool, event, sample, evsel, machine);
495 static int process_buildids(struct record *rec)
497 struct perf_data_file *file = &rec->file;
498 struct perf_session *session = rec->session;
504 * During this process, it'll load kernel map and replace the
505 * dso->long_name to a real pathname it found. In this case
506 * we prefer the vmlinux path like
507 * /lib/modules/3.16.4/build/vmlinux
509 * rather than build-id path (in debug directory).
510 * $HOME/.debug/.build-id/f0/6e17aa50adf4d00b88925e03775de107611551
512 symbol_conf.ignore_vmlinux_buildid = true;
515 * If --buildid-all is given, it marks all DSO regardless of hits,
516 * so no need to process samples.
518 if (rec->buildid_all)
519 rec->tool.sample = NULL;
521 return perf_session__process_events(session);
524 static void perf_event__synthesize_guest_os(struct machine *machine, void *data)
527 struct perf_tool *tool = data;
529 *As for guest kernel when processing subcommand record&report,
530 *we arrange module mmap prior to guest kernel mmap and trigger
531 *a preload dso because default guest module symbols are loaded
532 *from guest kallsyms instead of /lib/modules/XXX/XXX. This
533 *method is used to avoid symbol missing when the first addr is
534 *in module instead of in guest kernel.
536 err = perf_event__synthesize_modules(tool, process_synthesized_event,
539 pr_err("Couldn't record guest kernel [%d]'s reference"
540 " relocation symbol.\n", machine->pid);
543 * We use _stext for guest kernel because guest kernel's /proc/kallsyms
544 * have no _text sometimes.
546 err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
549 pr_err("Couldn't record guest kernel [%d]'s reference"
550 " relocation symbol.\n", machine->pid);
553 static struct perf_event_header finished_round_event = {
554 .size = sizeof(struct perf_event_header),
555 .type = PERF_RECORD_FINISHED_ROUND,
558 static int record__mmap_read_evlist(struct record *rec, struct perf_evlist *evlist,
561 u64 bytes_written = rec->bytes_written;
564 struct perf_mmap *maps;
569 maps = backward ? evlist->backward_mmap : evlist->mmap;
573 if (backward && evlist->bkw_mmap_state != BKW_MMAP_DATA_PENDING)
576 for (i = 0; i < evlist->nr_mmaps; i++) {
577 struct auxtrace_mmap *mm = &maps[i].auxtrace_mmap;
580 if (record__mmap_read(rec, &maps[i],
581 evlist->overwrite, backward) != 0) {
587 if (mm->base && !rec->opts.auxtrace_snapshot_mode &&
588 record__auxtrace_mmap_read(rec, mm) != 0) {
595 * Mark the round finished in case we wrote
596 * at least one event.
598 if (bytes_written != rec->bytes_written)
599 rc = record__write(rec, &finished_round_event, sizeof(finished_round_event));
602 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY);
607 static int record__mmap_read_all(struct record *rec)
611 err = record__mmap_read_evlist(rec, rec->evlist, false);
615 return record__mmap_read_evlist(rec, rec->evlist, true);
618 static void record__init_features(struct record *rec)
620 struct perf_session *session = rec->session;
623 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
624 perf_header__set_feat(&session->header, feat);
627 perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
629 if (!have_tracepoints(&rec->evlist->entries))
630 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
632 if (!rec->opts.branch_stack)
633 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
635 if (!rec->opts.full_auxtrace)
636 perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
638 perf_header__clear_feat(&session->header, HEADER_STAT);
642 record__finish_output(struct record *rec)
644 struct perf_data_file *file = &rec->file;
645 int fd = perf_data_file__fd(file);
650 rec->session->header.data_size += rec->bytes_written;
651 file->size = lseek(perf_data_file__fd(file), 0, SEEK_CUR);
653 if (!rec->no_buildid) {
654 process_buildids(rec);
656 if (rec->buildid_all)
657 dsos__hit_all(rec->session);
659 perf_session__write_header(rec->session, rec->evlist, fd, true);
664 static int record__synthesize_workload(struct record *rec, bool tail)
667 struct thread_map *thread_map;
669 if (rec->opts.tail_synthesize != tail)
672 thread_map = thread_map__new_by_tid(rec->evlist->workload.pid);
673 if (thread_map == NULL)
676 err = perf_event__synthesize_thread_map(&rec->tool, thread_map,
677 process_synthesized_event,
678 &rec->session->machines.host,
679 rec->opts.sample_address,
680 rec->opts.proc_map_timeout);
681 thread_map__put(thread_map);
685 static int record__synthesize(struct record *rec, bool tail);
688 record__switch_output(struct record *rec, bool at_exit)
690 struct perf_data_file *file = &rec->file;
693 /* Same Size: "2015122520103046"*/
694 char timestamp[] = "InvalidTimestamp";
696 record__synthesize(rec, true);
697 if (target__none(&rec->opts.target))
698 record__synthesize_workload(rec, true);
701 record__finish_output(rec);
702 err = fetch_current_timestamp(timestamp, sizeof(timestamp));
704 pr_err("Failed to get current timestamp\n");
708 fd = perf_data_file__switch(file, timestamp,
709 rec->session->header.data_offset,
711 if (fd >= 0 && !at_exit) {
712 rec->bytes_written = 0;
713 rec->session->header.data_size = 0;
717 fprintf(stderr, "[ perf record: Dump %s.%s ]\n",
718 file->path, timestamp);
720 /* Output tracking events */
722 record__synthesize(rec, false);
725 * In 'perf record --switch-output' without -a,
726 * record__synthesize() in record__switch_output() won't
727 * generate tracking events because there's no thread_map
728 * in evlist. Which causes newly created perf.data doesn't
729 * contain map and comm information.
730 * Create a fake thread_map and directly call
731 * perf_event__synthesize_thread_map() for those events.
733 if (target__none(&rec->opts.target))
734 record__synthesize_workload(rec, false);
739 static volatile int workload_exec_errno;
742 * perf_evlist__prepare_workload will send a SIGUSR1
743 * if the fork fails, since we asked by setting its
744 * want_signal to true.
746 static void workload_exec_failed_signal(int signo __maybe_unused,
748 void *ucontext __maybe_unused)
750 workload_exec_errno = info->si_value.sival_int;
755 static void snapshot_sig_handler(int sig);
756 static void alarm_sig_handler(int sig);
759 perf_event__synth_time_conv(const struct perf_event_mmap_page *pc __maybe_unused,
760 struct perf_tool *tool __maybe_unused,
761 perf_event__handler_t process __maybe_unused,
762 struct machine *machine __maybe_unused)
767 static const struct perf_event_mmap_page *
768 perf_evlist__pick_pc(struct perf_evlist *evlist)
771 if (evlist->mmap && evlist->mmap[0].base)
772 return evlist->mmap[0].base;
773 if (evlist->backward_mmap && evlist->backward_mmap[0].base)
774 return evlist->backward_mmap[0].base;
779 static const struct perf_event_mmap_page *record__pick_pc(struct record *rec)
781 const struct perf_event_mmap_page *pc;
783 pc = perf_evlist__pick_pc(rec->evlist);
789 static int record__synthesize(struct record *rec, bool tail)
791 struct perf_session *session = rec->session;
792 struct machine *machine = &session->machines.host;
793 struct perf_data_file *file = &rec->file;
794 struct record_opts *opts = &rec->opts;
795 struct perf_tool *tool = &rec->tool;
796 int fd = perf_data_file__fd(file);
799 if (rec->opts.tail_synthesize != tail)
804 * We need to synthesize events first, because some
805 * features works on top of them (on report side).
807 err = perf_event__synthesize_attrs(tool, session,
808 process_synthesized_event);
810 pr_err("Couldn't synthesize attrs.\n");
814 err = perf_event__synthesize_features(tool, session, rec->evlist,
815 process_synthesized_event);
817 pr_err("Couldn't synthesize features.\n");
821 if (have_tracepoints(&rec->evlist->entries)) {
823 * FIXME err <= 0 here actually means that
824 * there were no tracepoints so its not really
825 * an error, just that we don't need to
826 * synthesize anything. We really have to
827 * return this more properly and also
828 * propagate errors that now are calling die()
830 err = perf_event__synthesize_tracing_data(tool, fd, rec->evlist,
831 process_synthesized_event);
833 pr_err("Couldn't record tracing data.\n");
836 rec->bytes_written += err;
840 err = perf_event__synth_time_conv(record__pick_pc(rec), tool,
841 process_synthesized_event, machine);
845 if (rec->opts.full_auxtrace) {
846 err = perf_event__synthesize_auxtrace_info(rec->itr, tool,
847 session, process_synthesized_event);
852 err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
854 WARN_ONCE(err < 0, "Couldn't record kernel reference relocation symbol\n"
855 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
856 "Check /proc/kallsyms permission or run as root.\n");
858 err = perf_event__synthesize_modules(tool, process_synthesized_event,
860 WARN_ONCE(err < 0, "Couldn't record kernel module information.\n"
861 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
862 "Check /proc/modules permission or run as root.\n");
865 machines__process_guests(&session->machines,
866 perf_event__synthesize_guest_os, tool);
869 err = __machine__synthesize_threads(machine, tool, &opts->target, rec->evlist->threads,
870 process_synthesized_event, opts->sample_address,
871 opts->proc_map_timeout);
876 static int __cmd_record(struct record *rec, int argc, const char **argv)
880 unsigned long waking = 0;
881 const bool forks = argc > 0;
882 struct machine *machine;
883 struct perf_tool *tool = &rec->tool;
884 struct record_opts *opts = &rec->opts;
885 struct perf_data_file *file = &rec->file;
886 struct perf_session *session;
887 bool disabled = false, draining = false;
890 rec->progname = argv[0];
892 atexit(record__sig_exit);
893 signal(SIGCHLD, sig_handler);
894 signal(SIGINT, sig_handler);
895 signal(SIGTERM, sig_handler);
896 signal(SIGSEGV, sigsegv_handler);
898 if (rec->opts.record_namespaces)
899 tool->namespace_events = true;
901 if (rec->opts.auxtrace_snapshot_mode || rec->switch_output.enabled) {
902 signal(SIGUSR2, snapshot_sig_handler);
903 if (rec->opts.auxtrace_snapshot_mode)
904 trigger_on(&auxtrace_snapshot_trigger);
905 if (rec->switch_output.enabled)
906 trigger_on(&switch_output_trigger);
908 signal(SIGUSR2, SIG_IGN);
911 session = perf_session__new(file, false, tool);
912 if (session == NULL) {
913 pr_err("Perf session creation failed.\n");
917 fd = perf_data_file__fd(file);
918 rec->session = session;
920 record__init_features(rec);
923 err = perf_evlist__prepare_workload(rec->evlist, &opts->target,
925 workload_exec_failed_signal);
927 pr_err("Couldn't run the workload!\n");
929 goto out_delete_session;
933 if (record__open(rec) != 0) {
938 err = bpf__apply_obj_config();
942 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
943 pr_err("ERROR: Apply config to BPF failed: %s\n",
949 * Normally perf_session__new would do this, but it doesn't have the
952 if (rec->tool.ordered_events && !perf_evlist__sample_id_all(rec->evlist)) {
953 pr_warning("WARNING: No sample_id_all support, falling back to unordered processing\n");
954 rec->tool.ordered_events = false;
957 if (!rec->evlist->nr_groups)
958 perf_header__clear_feat(&session->header, HEADER_GROUP_DESC);
961 err = perf_header__write_pipe(fd);
965 err = perf_session__write_header(session, rec->evlist, fd, false);
971 && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) {
972 pr_err("Couldn't generate buildids. "
973 "Use --no-buildid to profile anyway.\n");
978 machine = &session->machines.host;
980 err = record__synthesize(rec, false);
984 if (rec->realtime_prio) {
985 struct sched_param param;
987 param.sched_priority = rec->realtime_prio;
988 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
989 pr_err("Could not set realtime priority.\n");
996 * When perf is starting the traced process, all the events
997 * (apart from group members) have enable_on_exec=1 set,
998 * so don't spoil it by prematurely enabling them.
1000 if (!target__none(&opts->target) && !opts->initial_delay)
1001 perf_evlist__enable(rec->evlist);
1007 union perf_event *event;
1010 event = malloc(sizeof(event->comm) + machine->id_hdr_size);
1011 if (event == NULL) {
1017 * Some H/W events are generated before COMM event
1018 * which is emitted during exec(), so perf script
1019 * cannot see a correct process name for those events.
1020 * Synthesize COMM event to prevent it.
1022 tgid = perf_event__synthesize_comm(tool, event,
1023 rec->evlist->workload.pid,
1024 process_synthesized_event,
1031 event = malloc(sizeof(event->namespaces) +
1032 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
1033 machine->id_hdr_size);
1034 if (event == NULL) {
1040 * Synthesize NAMESPACES event for the command specified.
1042 perf_event__synthesize_namespaces(tool, event,
1043 rec->evlist->workload.pid,
1044 tgid, process_synthesized_event,
1048 perf_evlist__start_workload(rec->evlist);
1051 if (opts->initial_delay) {
1052 usleep(opts->initial_delay * USEC_PER_MSEC);
1053 perf_evlist__enable(rec->evlist);
1056 trigger_ready(&auxtrace_snapshot_trigger);
1057 trigger_ready(&switch_output_trigger);
1058 perf_hooks__invoke_record_start();
1060 unsigned long long hits = rec->samples;
1063 * rec->evlist->bkw_mmap_state is possible to be
1064 * BKW_MMAP_EMPTY here: when done == true and
1065 * hits != rec->samples in previous round.
1067 * perf_evlist__toggle_bkw_mmap ensure we never
1068 * convert BKW_MMAP_EMPTY to BKW_MMAP_DATA_PENDING.
1070 if (trigger_is_hit(&switch_output_trigger) || done || draining)
1071 perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_DATA_PENDING);
1073 if (record__mmap_read_all(rec) < 0) {
1074 trigger_error(&auxtrace_snapshot_trigger);
1075 trigger_error(&switch_output_trigger);
1080 if (auxtrace_record__snapshot_started) {
1081 auxtrace_record__snapshot_started = 0;
1082 if (!trigger_is_error(&auxtrace_snapshot_trigger))
1083 record__read_auxtrace_snapshot(rec);
1084 if (trigger_is_error(&auxtrace_snapshot_trigger)) {
1085 pr_err("AUX area tracing snapshot failed\n");
1091 if (trigger_is_hit(&switch_output_trigger)) {
1093 * If switch_output_trigger is hit, the data in
1094 * overwritable ring buffer should have been collected,
1095 * so bkw_mmap_state should be set to BKW_MMAP_EMPTY.
1097 * If SIGUSR2 raise after or during record__mmap_read_all(),
1098 * record__mmap_read_all() didn't collect data from
1099 * overwritable ring buffer. Read again.
1101 if (rec->evlist->bkw_mmap_state == BKW_MMAP_RUNNING)
1103 trigger_ready(&switch_output_trigger);
1106 * Reenable events in overwrite ring buffer after
1107 * record__mmap_read_all(): we should have collected
1110 perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_RUNNING);
1113 fprintf(stderr, "[ perf record: dump data: Woken up %ld times ]\n",
1116 fd = record__switch_output(rec, false);
1118 pr_err("Failed to switch to new file\n");
1119 trigger_error(&switch_output_trigger);
1124 /* re-arm the alarm */
1125 if (rec->switch_output.time)
1126 alarm(rec->switch_output.time);
1129 if (hits == rec->samples) {
1130 if (done || draining)
1132 err = perf_evlist__poll(rec->evlist, -1);
1134 * Propagate error, only if there's any. Ignore positive
1135 * number of returned events and interrupt error.
1137 if (err > 0 || (err < 0 && errno == EINTR))
1141 if (perf_evlist__filter_pollfd(rec->evlist, POLLERR | POLLHUP) == 0)
1146 * When perf is starting the traced process, at the end events
1147 * die with the process and we wait for that. Thus no need to
1148 * disable events in this case.
1150 if (done && !disabled && !target__none(&opts->target)) {
1151 trigger_off(&auxtrace_snapshot_trigger);
1152 perf_evlist__disable(rec->evlist);
1156 trigger_off(&auxtrace_snapshot_trigger);
1157 trigger_off(&switch_output_trigger);
1159 if (forks && workload_exec_errno) {
1160 char msg[STRERR_BUFSIZE];
1161 const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
1162 pr_err("Workload failed: %s\n", emsg);
1168 fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking);
1170 if (target__none(&rec->opts.target))
1171 record__synthesize_workload(rec, true);
1177 if (!child_finished)
1178 kill(rec->evlist->workload.pid, SIGTERM);
1184 else if (WIFEXITED(exit_status))
1185 status = WEXITSTATUS(exit_status);
1186 else if (WIFSIGNALED(exit_status))
1187 signr = WTERMSIG(exit_status);
1191 record__synthesize(rec, true);
1192 /* this will be recalculated during process_buildids() */
1196 if (!rec->timestamp_filename) {
1197 record__finish_output(rec);
1199 fd = record__switch_output(rec, true);
1202 goto out_delete_session;
1207 perf_hooks__invoke_record_end();
1209 if (!err && !quiet) {
1211 const char *postfix = rec->timestamp_filename ?
1212 ".<timestamp>" : "";
1214 if (rec->samples && !rec->opts.full_auxtrace)
1215 scnprintf(samples, sizeof(samples),
1216 " (%" PRIu64 " samples)", rec->samples);
1220 fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s%s%s ]\n",
1221 perf_data_file__size(file) / 1024.0 / 1024.0,
1222 file->path, postfix, samples);
1226 perf_session__delete(session);
1230 static void callchain_debug(struct callchain_param *callchain)
1232 static const char *str[CALLCHAIN_MAX] = { "NONE", "FP", "DWARF", "LBR" };
1234 pr_debug("callchain: type %s\n", str[callchain->record_mode]);
1236 if (callchain->record_mode == CALLCHAIN_DWARF)
1237 pr_debug("callchain: stack dump size %d\n",
1238 callchain->dump_size);
1241 int record_opts__parse_callchain(struct record_opts *record,
1242 struct callchain_param *callchain,
1243 const char *arg, bool unset)
1246 callchain->enabled = !unset;
1248 /* --no-call-graph */
1250 callchain->record_mode = CALLCHAIN_NONE;
1251 pr_debug("callchain: disabled\n");
1255 ret = parse_callchain_record_opt(arg, callchain);
1257 /* Enable data address sampling for DWARF unwind. */
1258 if (callchain->record_mode == CALLCHAIN_DWARF)
1259 record->sample_address = true;
1260 callchain_debug(callchain);
1266 int record_parse_callchain_opt(const struct option *opt,
1270 return record_opts__parse_callchain(opt->value, &callchain_param, arg, unset);
1273 int record_callchain_opt(const struct option *opt,
1274 const char *arg __maybe_unused,
1275 int unset __maybe_unused)
1277 struct callchain_param *callchain = opt->value;
1279 callchain->enabled = true;
1281 if (callchain->record_mode == CALLCHAIN_NONE)
1282 callchain->record_mode = CALLCHAIN_FP;
1284 callchain_debug(callchain);
1288 static int perf_record_config(const char *var, const char *value, void *cb)
1290 struct record *rec = cb;
1292 if (!strcmp(var, "record.build-id")) {
1293 if (!strcmp(value, "cache"))
1294 rec->no_buildid_cache = false;
1295 else if (!strcmp(value, "no-cache"))
1296 rec->no_buildid_cache = true;
1297 else if (!strcmp(value, "skip"))
1298 rec->no_buildid = true;
1303 if (!strcmp(var, "record.call-graph"))
1304 var = "call-graph.record-mode"; /* fall-through */
1306 return perf_default_config(var, value, cb);
1309 struct clockid_map {
1314 #define CLOCKID_MAP(n, c) \
1315 { .name = n, .clockid = (c), }
1317 #define CLOCKID_END { .name = NULL, }
1321 * Add the missing ones, we need to build on many distros...
1323 #ifndef CLOCK_MONOTONIC_RAW
1324 #define CLOCK_MONOTONIC_RAW 4
1326 #ifndef CLOCK_BOOTTIME
1327 #define CLOCK_BOOTTIME 7
1330 #define CLOCK_TAI 11
1333 static const struct clockid_map clockids[] = {
1334 /* available for all events, NMI safe */
1335 CLOCKID_MAP("monotonic", CLOCK_MONOTONIC),
1336 CLOCKID_MAP("monotonic_raw", CLOCK_MONOTONIC_RAW),
1338 /* available for some events */
1339 CLOCKID_MAP("realtime", CLOCK_REALTIME),
1340 CLOCKID_MAP("boottime", CLOCK_BOOTTIME),
1341 CLOCKID_MAP("tai", CLOCK_TAI),
1343 /* available for the lazy */
1344 CLOCKID_MAP("mono", CLOCK_MONOTONIC),
1345 CLOCKID_MAP("raw", CLOCK_MONOTONIC_RAW),
1346 CLOCKID_MAP("real", CLOCK_REALTIME),
1347 CLOCKID_MAP("boot", CLOCK_BOOTTIME),
1352 static int parse_clockid(const struct option *opt, const char *str, int unset)
1354 struct record_opts *opts = (struct record_opts *)opt->value;
1355 const struct clockid_map *cm;
1356 const char *ostr = str;
1359 opts->use_clockid = 0;
1367 /* no setting it twice */
1368 if (opts->use_clockid)
1371 opts->use_clockid = true;
1373 /* if its a number, we're done */
1374 if (sscanf(str, "%d", &opts->clockid) == 1)
1377 /* allow a "CLOCK_" prefix to the name */
1378 if (!strncasecmp(str, "CLOCK_", 6))
1381 for (cm = clockids; cm->name; cm++) {
1382 if (!strcasecmp(str, cm->name)) {
1383 opts->clockid = cm->clockid;
1388 opts->use_clockid = false;
1389 ui__warning("unknown clockid %s, check man page\n", ostr);
1393 static int record__parse_mmap_pages(const struct option *opt,
1395 int unset __maybe_unused)
1397 struct record_opts *opts = opt->value;
1399 unsigned int mmap_pages;
1414 ret = __perf_evlist__parse_mmap_pages(&mmap_pages, s);
1417 opts->mmap_pages = mmap_pages;
1425 ret = __perf_evlist__parse_mmap_pages(&mmap_pages, p + 1);
1429 opts->auxtrace_mmap_pages = mmap_pages;
1436 static void switch_output_size_warn(struct record *rec)
1438 u64 wakeup_size = perf_evlist__mmap_size(rec->opts.mmap_pages);
1439 struct switch_output *s = &rec->switch_output;
1443 if (s->size < wakeup_size) {
1446 unit_number__scnprintf(buf, sizeof(buf), wakeup_size);
1447 pr_warning("WARNING: switch-output data size lower than "
1448 "wakeup kernel buffer size (%s) "
1449 "expect bigger perf.data sizes\n", buf);
1453 static int switch_output_setup(struct record *rec)
1455 struct switch_output *s = &rec->switch_output;
1456 static struct parse_tag tags_size[] = {
1457 { .tag = 'B', .mult = 1 },
1458 { .tag = 'K', .mult = 1 << 10 },
1459 { .tag = 'M', .mult = 1 << 20 },
1460 { .tag = 'G', .mult = 1 << 30 },
1463 static struct parse_tag tags_time[] = {
1464 { .tag = 's', .mult = 1 },
1465 { .tag = 'm', .mult = 60 },
1466 { .tag = 'h', .mult = 60*60 },
1467 { .tag = 'd', .mult = 60*60*24 },
1475 if (!strcmp(s->str, "signal")) {
1477 pr_debug("switch-output with SIGUSR2 signal\n");
1481 val = parse_tag_value(s->str, tags_size);
1482 if (val != (unsigned long) -1) {
1484 pr_debug("switch-output with %s size threshold\n", s->str);
1488 val = parse_tag_value(s->str, tags_time);
1489 if (val != (unsigned long) -1) {
1491 pr_debug("switch-output with %s time threshold (%lu seconds)\n",
1499 rec->timestamp_filename = true;
1502 if (s->size && !rec->opts.no_buffering)
1503 switch_output_size_warn(rec);
1508 static const char * const __record_usage[] = {
1509 "perf record [<options>] [<command>]",
1510 "perf record [<options>] -- <command> [<options>]",
1513 const char * const *record_usage = __record_usage;
1516 * XXX Ideally would be local to cmd_record() and passed to a record__new
1517 * because we need to have access to it in record__exit, that is called
1518 * after cmd_record() exits, but since record_options need to be accessible to
1519 * builtin-script, leave it here.
1521 * At least we don't ouch it in all the other functions here directly.
1523 * Just say no to tons of global variables, sigh.
1525 static struct record record = {
1527 .sample_time = true,
1528 .mmap_pages = UINT_MAX,
1529 .user_freq = UINT_MAX,
1530 .user_interval = ULLONG_MAX,
1534 .default_per_cpu = true,
1536 .proc_map_timeout = 500,
1539 .sample = process_sample_event,
1540 .fork = perf_event__process_fork,
1541 .exit = perf_event__process_exit,
1542 .comm = perf_event__process_comm,
1543 .namespaces = perf_event__process_namespaces,
1544 .mmap = perf_event__process_mmap,
1545 .mmap2 = perf_event__process_mmap2,
1546 .ordered_events = true,
1550 const char record_callchain_help[] = CALLCHAIN_RECORD_HELP
1551 "\n\t\t\t\tDefault: fp";
1553 static bool dry_run;
1556 * XXX Will stay a global variable till we fix builtin-script.c to stop messing
1557 * with it and switch to use the library functions in perf_evlist that came
1558 * from builtin-record.c, i.e. use record_opts,
1559 * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record',
1562 static struct option __record_options[] = {
1563 OPT_CALLBACK('e', "event", &record.evlist, "event",
1564 "event selector. use 'perf list' to list available events",
1565 parse_events_option),
1566 OPT_CALLBACK(0, "filter", &record.evlist, "filter",
1567 "event filter", parse_filter),
1568 OPT_CALLBACK_NOOPT(0, "exclude-perf", &record.evlist,
1569 NULL, "don't record events from perf itself",
1571 OPT_STRING('p', "pid", &record.opts.target.pid, "pid",
1572 "record events on existing process id"),
1573 OPT_STRING('t', "tid", &record.opts.target.tid, "tid",
1574 "record events on existing thread id"),
1575 OPT_INTEGER('r', "realtime", &record.realtime_prio,
1576 "collect data with this RT SCHED_FIFO priority"),
1577 OPT_BOOLEAN(0, "no-buffering", &record.opts.no_buffering,
1578 "collect data without buffering"),
1579 OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples,
1580 "collect raw sample records from all opened counters"),
1581 OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide,
1582 "system-wide collection from all CPUs"),
1583 OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu",
1584 "list of cpus to monitor"),
1585 OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"),
1586 OPT_STRING('o', "output", &record.file.path, "file",
1587 "output file name"),
1588 OPT_BOOLEAN_SET('i', "no-inherit", &record.opts.no_inherit,
1589 &record.opts.no_inherit_set,
1590 "child tasks do not inherit counters"),
1591 OPT_BOOLEAN(0, "tail-synthesize", &record.opts.tail_synthesize,
1592 "synthesize non-sample events at the end of output"),
1593 OPT_BOOLEAN(0, "overwrite", &record.opts.overwrite, "use overwrite mode"),
1594 OPT_UINTEGER('F', "freq", &record.opts.user_freq, "profile at this frequency"),
1595 OPT_CALLBACK('m', "mmap-pages", &record.opts, "pages[,pages]",
1596 "number of mmap data pages and AUX area tracing mmap pages",
1597 record__parse_mmap_pages),
1598 OPT_BOOLEAN(0, "group", &record.opts.group,
1599 "put the counters into a counter group"),
1600 OPT_CALLBACK_NOOPT('g', NULL, &callchain_param,
1601 NULL, "enables call-graph recording" ,
1602 &record_callchain_opt),
1603 OPT_CALLBACK(0, "call-graph", &record.opts,
1604 "record_mode[,record_size]", record_callchain_help,
1605 &record_parse_callchain_opt),
1606 OPT_INCR('v', "verbose", &verbose,
1607 "be more verbose (show counter open errors, etc)"),
1608 OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"),
1609 OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat,
1610 "per thread counts"),
1611 OPT_BOOLEAN('d', "data", &record.opts.sample_address, "Record the sample addresses"),
1612 OPT_BOOLEAN(0, "phys-data", &record.opts.sample_phys_addr,
1613 "Record the sample physical addresses"),
1614 OPT_BOOLEAN(0, "sample-cpu", &record.opts.sample_cpu, "Record the sample cpu"),
1615 OPT_BOOLEAN_SET('T', "timestamp", &record.opts.sample_time,
1616 &record.opts.sample_time_set,
1617 "Record the sample timestamps"),
1618 OPT_BOOLEAN_SET('P', "period", &record.opts.period, &record.opts.period_set,
1619 "Record the sample period"),
1620 OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples,
1622 OPT_BOOLEAN_SET('N', "no-buildid-cache", &record.no_buildid_cache,
1623 &record.no_buildid_cache_set,
1624 "do not update the buildid cache"),
1625 OPT_BOOLEAN_SET('B', "no-buildid", &record.no_buildid,
1626 &record.no_buildid_set,
1627 "do not collect buildids in perf.data"),
1628 OPT_CALLBACK('G', "cgroup", &record.evlist, "name",
1629 "monitor event in cgroup name only",
1631 OPT_UINTEGER('D', "delay", &record.opts.initial_delay,
1632 "ms to wait before starting measurement after program start"),
1633 OPT_STRING('u', "uid", &record.opts.target.uid_str, "user",
1636 OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack,
1637 "branch any", "sample any taken branches",
1638 parse_branch_stack),
1640 OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack,
1641 "branch filter mask", "branch stack filter modes",
1642 parse_branch_stack),
1643 OPT_BOOLEAN('W', "weight", &record.opts.sample_weight,
1644 "sample by weight (on special events only)"),
1645 OPT_BOOLEAN(0, "transaction", &record.opts.sample_transaction,
1646 "sample transaction flags (special events only)"),
1647 OPT_BOOLEAN(0, "per-thread", &record.opts.target.per_thread,
1648 "use per-thread mmaps"),
1649 OPT_CALLBACK_OPTARG('I', "intr-regs", &record.opts.sample_intr_regs, NULL, "any register",
1650 "sample selected machine registers on interrupt,"
1651 " use -I ? to list register names", parse_regs),
1652 OPT_BOOLEAN(0, "running-time", &record.opts.running_time,
1653 "Record running/enabled time of read (:S) events"),
1654 OPT_CALLBACK('k', "clockid", &record.opts,
1655 "clockid", "clockid to use for events, see clock_gettime()",
1657 OPT_STRING_OPTARG('S', "snapshot", &record.opts.auxtrace_snapshot_opts,
1658 "opts", "AUX area tracing Snapshot Mode", ""),
1659 OPT_UINTEGER(0, "proc-map-timeout", &record.opts.proc_map_timeout,
1660 "per thread proc mmap processing timeout in ms"),
1661 OPT_BOOLEAN(0, "namespaces", &record.opts.record_namespaces,
1662 "Record namespaces events"),
1663 OPT_BOOLEAN(0, "switch-events", &record.opts.record_switch_events,
1664 "Record context switch events"),
1665 OPT_BOOLEAN_FLAG(0, "all-kernel", &record.opts.all_kernel,
1666 "Configure all used events to run in kernel space.",
1667 PARSE_OPT_EXCLUSIVE),
1668 OPT_BOOLEAN_FLAG(0, "all-user", &record.opts.all_user,
1669 "Configure all used events to run in user space.",
1670 PARSE_OPT_EXCLUSIVE),
1671 OPT_STRING(0, "clang-path", &llvm_param.clang_path, "clang path",
1672 "clang binary to use for compiling BPF scriptlets"),
1673 OPT_STRING(0, "clang-opt", &llvm_param.clang_opt, "clang options",
1674 "options passed to clang when compiling BPF scriptlets"),
1675 OPT_STRING(0, "vmlinux", &symbol_conf.vmlinux_name,
1676 "file", "vmlinux pathname"),
1677 OPT_BOOLEAN(0, "buildid-all", &record.buildid_all,
1678 "Record build-id of all DSOs regardless of hits"),
1679 OPT_BOOLEAN(0, "timestamp-filename", &record.timestamp_filename,
1680 "append timestamp to output filename"),
1681 OPT_STRING_OPTARG_SET(0, "switch-output", &record.switch_output.str,
1682 &record.switch_output.set, "signal,size,time",
1683 "Switch output when receive SIGUSR2 or cross size,time threshold",
1685 OPT_BOOLEAN(0, "dry-run", &dry_run,
1686 "Parse options then exit"),
1690 struct option *record_options = __record_options;
1692 int cmd_record(int argc, const char **argv)
1695 struct record *rec = &record;
1696 char errbuf[BUFSIZ];
1698 #ifndef HAVE_LIBBPF_SUPPORT
1699 # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, "NO_LIBBPF=1", c)
1700 set_nobuild('\0', "clang-path", true);
1701 set_nobuild('\0', "clang-opt", true);
1705 #ifndef HAVE_BPF_PROLOGUE
1706 # if !defined (HAVE_DWARF_SUPPORT)
1707 # define REASON "NO_DWARF=1"
1708 # elif !defined (HAVE_LIBBPF_SUPPORT)
1709 # define REASON "NO_LIBBPF=1"
1711 # define REASON "this architecture doesn't support BPF prologue"
1713 # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, REASON, c)
1714 set_nobuild('\0', "vmlinux", true);
1719 rec->evlist = perf_evlist__new();
1720 if (rec->evlist == NULL)
1723 err = perf_config(perf_record_config, rec);
1727 argc = parse_options(argc, argv, record_options, record_usage,
1728 PARSE_OPT_STOP_AT_NON_OPTION);
1730 perf_quiet_option();
1732 /* Make system wide (-a) the default target. */
1733 if (!argc && target__none(&rec->opts.target))
1734 rec->opts.target.system_wide = true;
1736 if (nr_cgroups && !rec->opts.target.system_wide) {
1737 usage_with_options_msg(record_usage, record_options,
1738 "cgroup monitoring only available in system-wide mode");
1741 if (rec->opts.record_switch_events &&
1742 !perf_can_record_switch_events()) {
1743 ui__error("kernel does not support recording context switch events\n");
1744 parse_options_usage(record_usage, record_options, "switch-events", 0);
1748 if (switch_output_setup(rec)) {
1749 parse_options_usage(record_usage, record_options, "switch-output", 0);
1753 if (rec->switch_output.time) {
1754 signal(SIGALRM, alarm_sig_handler);
1755 alarm(rec->switch_output.time);
1759 rec->itr = auxtrace_record__init(rec->evlist, &err);
1764 err = auxtrace_parse_snapshot_options(rec->itr, &rec->opts,
1765 rec->opts.auxtrace_snapshot_opts);
1770 * Allow aliases to facilitate the lookup of symbols for address
1771 * filters. Refer to auxtrace_parse_filters().
1773 symbol_conf.allow_aliases = true;
1777 err = auxtrace_parse_filters(rec->evlist);
1784 err = bpf__setup_stdout(rec->evlist);
1786 bpf__strerror_setup_stdout(rec->evlist, err, errbuf, sizeof(errbuf));
1787 pr_err("ERROR: Setup BPF stdout failed: %s\n",
1794 if (symbol_conf.kptr_restrict)
1796 "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n"
1797 "check /proc/sys/kernel/kptr_restrict.\n\n"
1798 "Samples in kernel functions may not be resolved if a suitable vmlinux\n"
1799 "file is not found in the buildid cache or in the vmlinux path.\n\n"
1800 "Samples in kernel modules won't be resolved at all.\n\n"
1801 "If some relocation was applied (e.g. kexec) symbols may be misresolved\n"
1802 "even with a suitable vmlinux or kallsyms file.\n\n");
1804 if (rec->no_buildid_cache || rec->no_buildid) {
1805 disable_buildid_cache();
1806 } else if (rec->switch_output.enabled) {
1808 * In 'perf record --switch-output', disable buildid
1809 * generation by default to reduce data file switching
1810 * overhead. Still generate buildid if they are required
1813 * perf record --switch-output --no-no-buildid \
1814 * --no-no-buildid-cache
1816 * Following code equals to:
1818 * if ((rec->no_buildid || !rec->no_buildid_set) &&
1819 * (rec->no_buildid_cache || !rec->no_buildid_cache_set))
1820 * disable_buildid_cache();
1822 bool disable = true;
1824 if (rec->no_buildid_set && !rec->no_buildid)
1826 if (rec->no_buildid_cache_set && !rec->no_buildid_cache)
1829 rec->no_buildid = true;
1830 rec->no_buildid_cache = true;
1831 disable_buildid_cache();
1835 if (record.opts.overwrite)
1836 record.opts.tail_synthesize = true;
1838 if (rec->evlist->nr_entries == 0 &&
1839 __perf_evlist__add_default(rec->evlist, !record.opts.no_samples) < 0) {
1840 pr_err("Not enough memory for event selector list\n");
1844 if (rec->opts.target.tid && !rec->opts.no_inherit_set)
1845 rec->opts.no_inherit = true;
1847 err = target__validate(&rec->opts.target);
1849 target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
1850 ui__warning("%s", errbuf);
1853 err = target__parse_uid(&rec->opts.target);
1855 int saved_errno = errno;
1857 target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
1858 ui__error("%s", errbuf);
1864 /* Enable ignoring missing threads when -u/-p option is defined. */
1865 rec->opts.ignore_missing_thread = rec->opts.target.uid != UINT_MAX || rec->opts.target.pid;
1868 if (perf_evlist__create_maps(rec->evlist, &rec->opts.target) < 0)
1869 usage_with_options(record_usage, record_options);
1871 err = auxtrace_record__options(rec->itr, rec->evlist, &rec->opts);
1876 * We take all buildids when the file contains
1877 * AUX area tracing data because we do not decode the
1878 * trace because it would take too long.
1880 if (rec->opts.full_auxtrace)
1881 rec->buildid_all = true;
1883 if (record_opts__config(&rec->opts)) {
1888 err = __cmd_record(&record, argc, argv);
1890 perf_evlist__delete(rec->evlist);
1892 auxtrace_record__free(rec->itr);
1896 static void snapshot_sig_handler(int sig __maybe_unused)
1898 struct record *rec = &record;
1900 if (trigger_is_ready(&auxtrace_snapshot_trigger)) {
1901 trigger_hit(&auxtrace_snapshot_trigger);
1902 auxtrace_record__snapshot_started = 1;
1903 if (auxtrace_record__snapshot_start(record.itr))
1904 trigger_error(&auxtrace_snapshot_trigger);
1907 if (switch_output_signal(rec))
1908 trigger_hit(&switch_output_trigger);
1911 static void alarm_sig_handler(int sig __maybe_unused)
1913 struct record *rec = &record;
1915 if (switch_output_time(rec))
1916 trigger_hit(&switch_output_trigger);