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.
12 #include "util/build-id.h"
13 #include "util/util.h"
14 #include <subcmd/parse-options.h>
15 #include "util/parse-events.h"
16 #include "util/config.h"
18 #include "util/callchain.h"
19 #include "util/cgroup.h"
20 #include "util/header.h"
21 #include "util/event.h"
22 #include "util/evlist.h"
23 #include "util/evsel.h"
24 #include "util/debug.h"
25 #include "util/drv_configs.h"
26 #include "util/session.h"
27 #include "util/tool.h"
28 #include "util/symbol.h"
29 #include "util/cpumap.h"
30 #include "util/thread_map.h"
31 #include "util/data.h"
32 #include "util/perf_regs.h"
33 #include "util/auxtrace.h"
35 #include "util/parse-branch-options.h"
36 #include "util/parse-regs-options.h"
37 #include "util/llvm-utils.h"
38 #include "util/bpf-loader.h"
39 #include "util/trigger.h"
40 #include "util/perf-hooks.h"
41 #include "util/time-utils.h"
42 #include "util/units.h"
54 #include <linux/time64.h>
56 struct switch_output {
66 struct perf_tool tool;
67 struct record_opts opts;
69 struct perf_data_file file;
70 struct auxtrace_record *itr;
71 struct perf_evlist *evlist;
72 struct perf_session *session;
77 bool no_buildid_cache;
78 bool no_buildid_cache_set;
80 bool timestamp_filename;
81 struct switch_output switch_output;
82 unsigned long long samples;
85 static volatile int auxtrace_record__snapshot_started;
86 static DEFINE_TRIGGER(auxtrace_snapshot_trigger);
87 static DEFINE_TRIGGER(switch_output_trigger);
89 static bool switch_output_signal(struct record *rec)
91 return rec->switch_output.signal &&
92 trigger_is_ready(&switch_output_trigger);
95 static bool switch_output_size(struct record *rec)
97 return rec->switch_output.size &&
98 trigger_is_ready(&switch_output_trigger) &&
99 (rec->bytes_written >= rec->switch_output.size);
102 static bool switch_output_time(struct record *rec)
104 return rec->switch_output.time &&
105 trigger_is_ready(&switch_output_trigger);
108 static int record__write(struct record *rec, void *bf, size_t size)
110 if (perf_data_file__write(rec->session->file, bf, size) < 0) {
111 pr_err("failed to write perf data, error: %m\n");
115 rec->bytes_written += size;
117 if (switch_output_size(rec))
118 trigger_hit(&switch_output_trigger);
123 static int process_synthesized_event(struct perf_tool *tool,
124 union perf_event *event,
125 struct perf_sample *sample __maybe_unused,
126 struct machine *machine __maybe_unused)
128 struct record *rec = container_of(tool, struct record, tool);
129 return record__write(rec, event, event->header.size);
133 backward_rb_find_range(void *buf, int mask, u64 head, u64 *start, u64 *end)
135 struct perf_event_header *pheader;
139 pr_debug2("backward_rb_find_range: buf=%p, head=%"PRIx64"\n", buf, head);
140 pheader = (struct perf_event_header *)(buf + (head & mask));
143 if (evt_head - head >= (unsigned int)size) {
144 pr_debug("Finished reading backward ring buffer: rewind\n");
145 if (evt_head - head > (unsigned int)size)
146 evt_head -= pheader->size;
151 pheader = (struct perf_event_header *)(buf + (evt_head & mask));
153 if (pheader->size == 0) {
154 pr_debug("Finished reading backward ring buffer: get start\n");
159 evt_head += pheader->size;
160 pr_debug3("move evt_head: %"PRIx64"\n", evt_head);
162 WARN_ONCE(1, "Shouldn't get here\n");
167 rb_find_range(void *data, int mask, u64 head, u64 old,
168 u64 *start, u64 *end, bool backward)
176 return backward_rb_find_range(data, mask, head, start, end);
180 record__mmap_read(struct record *rec, struct perf_mmap *md,
181 bool overwrite, bool backward)
183 u64 head = perf_mmap__read_head(md);
185 u64 end = head, start = old;
186 unsigned char *data = md->base + page_size;
191 if (rb_find_range(data, md->mask, head,
192 old, &start, &end, backward))
201 if (size > (unsigned long)(md->mask) + 1) {
202 WARN_ONCE(1, "failed to keep up with mmap data. (warn only once)\n");
205 perf_mmap__consume(md, overwrite || backward);
209 if ((start & md->mask) + size != (end & md->mask)) {
210 buf = &data[start & md->mask];
211 size = md->mask + 1 - (start & md->mask);
214 if (record__write(rec, buf, size) < 0) {
220 buf = &data[start & md->mask];
224 if (record__write(rec, buf, size) < 0) {
230 perf_mmap__consume(md, overwrite || backward);
235 static volatile int done;
236 static volatile int signr = -1;
237 static volatile int child_finished;
239 static void sig_handler(int sig)
249 static void sigsegv_handler(int sig)
251 perf_hooks__recover();
252 sighandler_dump_stack(sig);
255 static void record__sig_exit(void)
260 signal(signr, SIG_DFL);
264 #ifdef HAVE_AUXTRACE_SUPPORT
266 static int record__process_auxtrace(struct perf_tool *tool,
267 union perf_event *event, void *data1,
268 size_t len1, void *data2, size_t len2)
270 struct record *rec = container_of(tool, struct record, tool);
271 struct perf_data_file *file = &rec->file;
275 if (!perf_data_file__is_pipe(file)) {
277 int fd = perf_data_file__fd(file);
280 file_offset = lseek(fd, 0, SEEK_CUR);
281 if (file_offset == -1)
283 err = auxtrace_index__auxtrace_event(&rec->session->auxtrace_index,
289 /* event.auxtrace.size includes padding, see __auxtrace_mmap__read() */
290 padding = (len1 + len2) & 7;
292 padding = 8 - padding;
294 record__write(rec, event, event->header.size);
295 record__write(rec, data1, len1);
297 record__write(rec, data2, len2);
298 record__write(rec, &pad, padding);
303 static int record__auxtrace_mmap_read(struct record *rec,
304 struct auxtrace_mmap *mm)
308 ret = auxtrace_mmap__read(mm, rec->itr, &rec->tool,
309 record__process_auxtrace);
319 static int record__auxtrace_mmap_read_snapshot(struct record *rec,
320 struct auxtrace_mmap *mm)
324 ret = auxtrace_mmap__read_snapshot(mm, rec->itr, &rec->tool,
325 record__process_auxtrace,
326 rec->opts.auxtrace_snapshot_size);
336 static int record__auxtrace_read_snapshot_all(struct record *rec)
341 for (i = 0; i < rec->evlist->nr_mmaps; i++) {
342 struct auxtrace_mmap *mm =
343 &rec->evlist->mmap[i].auxtrace_mmap;
348 if (record__auxtrace_mmap_read_snapshot(rec, mm) != 0) {
357 static void record__read_auxtrace_snapshot(struct record *rec)
359 pr_debug("Recording AUX area tracing snapshot\n");
360 if (record__auxtrace_read_snapshot_all(rec) < 0) {
361 trigger_error(&auxtrace_snapshot_trigger);
363 if (auxtrace_record__snapshot_finish(rec->itr))
364 trigger_error(&auxtrace_snapshot_trigger);
366 trigger_ready(&auxtrace_snapshot_trigger);
373 int record__auxtrace_mmap_read(struct record *rec __maybe_unused,
374 struct auxtrace_mmap *mm __maybe_unused)
380 void record__read_auxtrace_snapshot(struct record *rec __maybe_unused)
385 int auxtrace_record__snapshot_start(struct auxtrace_record *itr __maybe_unused)
392 static int record__mmap_evlist(struct record *rec,
393 struct perf_evlist *evlist)
395 struct record_opts *opts = &rec->opts;
398 if (perf_evlist__mmap_ex(evlist, opts->mmap_pages, false,
399 opts->auxtrace_mmap_pages,
400 opts->auxtrace_snapshot_mode) < 0) {
401 if (errno == EPERM) {
402 pr_err("Permission error mapping pages.\n"
403 "Consider increasing "
404 "/proc/sys/kernel/perf_event_mlock_kb,\n"
405 "or try again with a smaller value of -m/--mmap_pages.\n"
406 "(current value: %u,%u)\n",
407 opts->mmap_pages, opts->auxtrace_mmap_pages);
410 pr_err("failed to mmap with %d (%s)\n", errno,
411 str_error_r(errno, msg, sizeof(msg)));
421 static int record__mmap(struct record *rec)
423 return record__mmap_evlist(rec, rec->evlist);
426 static int record__open(struct record *rec)
429 struct perf_evsel *pos;
430 struct perf_evlist *evlist = rec->evlist;
431 struct perf_session *session = rec->session;
432 struct record_opts *opts = &rec->opts;
433 struct perf_evsel_config_term *err_term;
436 perf_evlist__config(evlist, opts, &callchain_param);
438 evlist__for_each_entry(evlist, pos) {
440 if (perf_evsel__open(pos, pos->cpus, pos->threads) < 0) {
441 if (perf_evsel__fallback(pos, errno, msg, sizeof(msg))) {
443 ui__warning("%s\n", msg);
448 perf_evsel__open_strerror(pos, &opts->target,
449 errno, msg, sizeof(msg));
450 ui__error("%s\n", msg);
455 if (perf_evlist__apply_filters(evlist, &pos)) {
456 pr_err("failed to set filter \"%s\" on event %s with %d (%s)\n",
457 pos->filter, perf_evsel__name(pos), errno,
458 str_error_r(errno, msg, sizeof(msg)));
463 if (perf_evlist__apply_drv_configs(evlist, &pos, &err_term)) {
464 pr_err("failed to set config \"%s\" on event %s with %d (%s)\n",
465 err_term->val.drv_cfg, perf_evsel__name(pos), errno,
466 str_error_r(errno, msg, sizeof(msg)));
471 rc = record__mmap(rec);
475 session->evlist = evlist;
476 perf_session__set_id_hdr_size(session);
481 static int process_sample_event(struct perf_tool *tool,
482 union perf_event *event,
483 struct perf_sample *sample,
484 struct perf_evsel *evsel,
485 struct machine *machine)
487 struct record *rec = container_of(tool, struct record, tool);
491 return build_id__mark_dso_hit(tool, event, sample, evsel, machine);
494 static int process_buildids(struct record *rec)
496 struct perf_data_file *file = &rec->file;
497 struct perf_session *session = rec->session;
503 * During this process, it'll load kernel map and replace the
504 * dso->long_name to a real pathname it found. In this case
505 * we prefer the vmlinux path like
506 * /lib/modules/3.16.4/build/vmlinux
508 * rather than build-id path (in debug directory).
509 * $HOME/.debug/.build-id/f0/6e17aa50adf4d00b88925e03775de107611551
511 symbol_conf.ignore_vmlinux_buildid = true;
514 * If --buildid-all is given, it marks all DSO regardless of hits,
515 * so no need to process samples.
517 if (rec->buildid_all)
518 rec->tool.sample = NULL;
520 return perf_session__process_events(session);
523 static void perf_event__synthesize_guest_os(struct machine *machine, void *data)
526 struct perf_tool *tool = data;
528 *As for guest kernel when processing subcommand record&report,
529 *we arrange module mmap prior to guest kernel mmap and trigger
530 *a preload dso because default guest module symbols are loaded
531 *from guest kallsyms instead of /lib/modules/XXX/XXX. This
532 *method is used to avoid symbol missing when the first addr is
533 *in module instead of in guest kernel.
535 err = perf_event__synthesize_modules(tool, process_synthesized_event,
538 pr_err("Couldn't record guest kernel [%d]'s reference"
539 " relocation symbol.\n", machine->pid);
542 * We use _stext for guest kernel because guest kernel's /proc/kallsyms
543 * have no _text sometimes.
545 err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
548 pr_err("Couldn't record guest kernel [%d]'s reference"
549 " relocation symbol.\n", machine->pid);
552 static struct perf_event_header finished_round_event = {
553 .size = sizeof(struct perf_event_header),
554 .type = PERF_RECORD_FINISHED_ROUND,
557 static int record__mmap_read_evlist(struct record *rec, struct perf_evlist *evlist,
560 u64 bytes_written = rec->bytes_written;
563 struct perf_mmap *maps;
568 maps = backward ? evlist->backward_mmap : evlist->mmap;
572 if (backward && evlist->bkw_mmap_state != BKW_MMAP_DATA_PENDING)
575 for (i = 0; i < evlist->nr_mmaps; i++) {
576 struct auxtrace_mmap *mm = &maps[i].auxtrace_mmap;
579 if (record__mmap_read(rec, &maps[i],
580 evlist->overwrite, backward) != 0) {
586 if (mm->base && !rec->opts.auxtrace_snapshot_mode &&
587 record__auxtrace_mmap_read(rec, mm) != 0) {
594 * Mark the round finished in case we wrote
595 * at least one event.
597 if (bytes_written != rec->bytes_written)
598 rc = record__write(rec, &finished_round_event, sizeof(finished_round_event));
601 perf_evlist__toggle_bkw_mmap(evlist, BKW_MMAP_EMPTY);
606 static int record__mmap_read_all(struct record *rec)
610 err = record__mmap_read_evlist(rec, rec->evlist, false);
614 return record__mmap_read_evlist(rec, rec->evlist, true);
617 static void record__init_features(struct record *rec)
619 struct perf_session *session = rec->session;
622 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
623 perf_header__set_feat(&session->header, feat);
626 perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
628 if (!have_tracepoints(&rec->evlist->entries))
629 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
631 if (!rec->opts.branch_stack)
632 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
634 if (!rec->opts.full_auxtrace)
635 perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
637 perf_header__clear_feat(&session->header, HEADER_STAT);
641 record__finish_output(struct record *rec)
643 struct perf_data_file *file = &rec->file;
644 int fd = perf_data_file__fd(file);
649 rec->session->header.data_size += rec->bytes_written;
650 file->size = lseek(perf_data_file__fd(file), 0, SEEK_CUR);
652 if (!rec->no_buildid) {
653 process_buildids(rec);
655 if (rec->buildid_all)
656 dsos__hit_all(rec->session);
658 perf_session__write_header(rec->session, rec->evlist, fd, true);
663 static int record__synthesize_workload(struct record *rec, bool tail)
666 struct thread_map *thread_map;
668 if (rec->opts.tail_synthesize != tail)
671 thread_map = thread_map__new_by_tid(rec->evlist->workload.pid);
672 if (thread_map == NULL)
675 err = perf_event__synthesize_thread_map(&rec->tool, thread_map,
676 process_synthesized_event,
677 &rec->session->machines.host,
678 rec->opts.sample_address,
679 rec->opts.proc_map_timeout);
680 thread_map__put(thread_map);
684 static int record__synthesize(struct record *rec, bool tail);
687 record__switch_output(struct record *rec, bool at_exit)
689 struct perf_data_file *file = &rec->file;
692 /* Same Size: "2015122520103046"*/
693 char timestamp[] = "InvalidTimestamp";
695 record__synthesize(rec, true);
696 if (target__none(&rec->opts.target))
697 record__synthesize_workload(rec, true);
700 record__finish_output(rec);
701 err = fetch_current_timestamp(timestamp, sizeof(timestamp));
703 pr_err("Failed to get current timestamp\n");
707 fd = perf_data_file__switch(file, timestamp,
708 rec->session->header.data_offset,
710 if (fd >= 0 && !at_exit) {
711 rec->bytes_written = 0;
712 rec->session->header.data_size = 0;
716 fprintf(stderr, "[ perf record: Dump %s.%s ]\n",
717 file->path, timestamp);
719 /* Output tracking events */
721 record__synthesize(rec, false);
724 * In 'perf record --switch-output' without -a,
725 * record__synthesize() in record__switch_output() won't
726 * generate tracking events because there's no thread_map
727 * in evlist. Which causes newly created perf.data doesn't
728 * contain map and comm information.
729 * Create a fake thread_map and directly call
730 * perf_event__synthesize_thread_map() for those events.
732 if (target__none(&rec->opts.target))
733 record__synthesize_workload(rec, false);
738 static volatile int workload_exec_errno;
741 * perf_evlist__prepare_workload will send a SIGUSR1
742 * if the fork fails, since we asked by setting its
743 * want_signal to true.
745 static void workload_exec_failed_signal(int signo __maybe_unused,
747 void *ucontext __maybe_unused)
749 workload_exec_errno = info->si_value.sival_int;
754 static void snapshot_sig_handler(int sig);
755 static void alarm_sig_handler(int sig);
758 perf_event__synth_time_conv(const struct perf_event_mmap_page *pc __maybe_unused,
759 struct perf_tool *tool __maybe_unused,
760 perf_event__handler_t process __maybe_unused,
761 struct machine *machine __maybe_unused)
766 static const struct perf_event_mmap_page *
767 perf_evlist__pick_pc(struct perf_evlist *evlist)
770 if (evlist->mmap && evlist->mmap[0].base)
771 return evlist->mmap[0].base;
772 if (evlist->backward_mmap && evlist->backward_mmap[0].base)
773 return evlist->backward_mmap[0].base;
778 static const struct perf_event_mmap_page *record__pick_pc(struct record *rec)
780 const struct perf_event_mmap_page *pc;
782 pc = perf_evlist__pick_pc(rec->evlist);
788 static int record__synthesize(struct record *rec, bool tail)
790 struct perf_session *session = rec->session;
791 struct machine *machine = &session->machines.host;
792 struct perf_data_file *file = &rec->file;
793 struct record_opts *opts = &rec->opts;
794 struct perf_tool *tool = &rec->tool;
795 int fd = perf_data_file__fd(file);
798 if (rec->opts.tail_synthesize != tail)
802 err = perf_event__synthesize_attrs(tool, session,
803 process_synthesized_event);
805 pr_err("Couldn't synthesize attrs.\n");
809 if (have_tracepoints(&rec->evlist->entries)) {
811 * FIXME err <= 0 here actually means that
812 * there were no tracepoints so its not really
813 * an error, just that we don't need to
814 * synthesize anything. We really have to
815 * return this more properly and also
816 * propagate errors that now are calling die()
818 err = perf_event__synthesize_tracing_data(tool, fd, rec->evlist,
819 process_synthesized_event);
821 pr_err("Couldn't record tracing data.\n");
824 rec->bytes_written += err;
828 err = perf_event__synth_time_conv(record__pick_pc(rec), tool,
829 process_synthesized_event, machine);
833 if (rec->opts.full_auxtrace) {
834 err = perf_event__synthesize_auxtrace_info(rec->itr, tool,
835 session, process_synthesized_event);
840 err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
842 WARN_ONCE(err < 0, "Couldn't record kernel reference relocation symbol\n"
843 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
844 "Check /proc/kallsyms permission or run as root.\n");
846 err = perf_event__synthesize_modules(tool, process_synthesized_event,
848 WARN_ONCE(err < 0, "Couldn't record kernel module information.\n"
849 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
850 "Check /proc/modules permission or run as root.\n");
853 machines__process_guests(&session->machines,
854 perf_event__synthesize_guest_os, tool);
857 err = __machine__synthesize_threads(machine, tool, &opts->target, rec->evlist->threads,
858 process_synthesized_event, opts->sample_address,
859 opts->proc_map_timeout);
864 static int __cmd_record(struct record *rec, int argc, const char **argv)
868 unsigned long waking = 0;
869 const bool forks = argc > 0;
870 struct machine *machine;
871 struct perf_tool *tool = &rec->tool;
872 struct record_opts *opts = &rec->opts;
873 struct perf_data_file *file = &rec->file;
874 struct perf_session *session;
875 bool disabled = false, draining = false;
878 rec->progname = argv[0];
880 atexit(record__sig_exit);
881 signal(SIGCHLD, sig_handler);
882 signal(SIGINT, sig_handler);
883 signal(SIGTERM, sig_handler);
884 signal(SIGSEGV, sigsegv_handler);
886 if (rec->opts.record_namespaces)
887 tool->namespace_events = true;
889 if (rec->opts.auxtrace_snapshot_mode || rec->switch_output.enabled) {
890 signal(SIGUSR2, snapshot_sig_handler);
891 if (rec->opts.auxtrace_snapshot_mode)
892 trigger_on(&auxtrace_snapshot_trigger);
893 if (rec->switch_output.enabled)
894 trigger_on(&switch_output_trigger);
896 signal(SIGUSR2, SIG_IGN);
899 session = perf_session__new(file, false, tool);
900 if (session == NULL) {
901 pr_err("Perf session creation failed.\n");
905 fd = perf_data_file__fd(file);
906 rec->session = session;
908 record__init_features(rec);
911 err = perf_evlist__prepare_workload(rec->evlist, &opts->target,
913 workload_exec_failed_signal);
915 pr_err("Couldn't run the workload!\n");
917 goto out_delete_session;
921 if (record__open(rec) != 0) {
926 err = bpf__apply_obj_config();
930 bpf__strerror_apply_obj_config(err, errbuf, sizeof(errbuf));
931 pr_err("ERROR: Apply config to BPF failed: %s\n",
937 * Normally perf_session__new would do this, but it doesn't have the
940 if (rec->tool.ordered_events && !perf_evlist__sample_id_all(rec->evlist)) {
941 pr_warning("WARNING: No sample_id_all support, falling back to unordered processing\n");
942 rec->tool.ordered_events = false;
945 if (!rec->evlist->nr_groups)
946 perf_header__clear_feat(&session->header, HEADER_GROUP_DESC);
949 err = perf_header__write_pipe(fd);
953 err = perf_session__write_header(session, rec->evlist, fd, false);
959 && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) {
960 pr_err("Couldn't generate buildids. "
961 "Use --no-buildid to profile anyway.\n");
966 machine = &session->machines.host;
968 err = record__synthesize(rec, false);
972 if (rec->realtime_prio) {
973 struct sched_param param;
975 param.sched_priority = rec->realtime_prio;
976 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
977 pr_err("Could not set realtime priority.\n");
984 * When perf is starting the traced process, all the events
985 * (apart from group members) have enable_on_exec=1 set,
986 * so don't spoil it by prematurely enabling them.
988 if (!target__none(&opts->target) && !opts->initial_delay)
989 perf_evlist__enable(rec->evlist);
995 union perf_event *event;
998 event = malloc(sizeof(event->comm) + machine->id_hdr_size);
1005 * Some H/W events are generated before COMM event
1006 * which is emitted during exec(), so perf script
1007 * cannot see a correct process name for those events.
1008 * Synthesize COMM event to prevent it.
1010 tgid = perf_event__synthesize_comm(tool, event,
1011 rec->evlist->workload.pid,
1012 process_synthesized_event,
1019 event = malloc(sizeof(event->namespaces) +
1020 (NR_NAMESPACES * sizeof(struct perf_ns_link_info)) +
1021 machine->id_hdr_size);
1022 if (event == NULL) {
1028 * Synthesize NAMESPACES event for the command specified.
1030 perf_event__synthesize_namespaces(tool, event,
1031 rec->evlist->workload.pid,
1032 tgid, process_synthesized_event,
1036 perf_evlist__start_workload(rec->evlist);
1039 if (opts->initial_delay) {
1040 usleep(opts->initial_delay * USEC_PER_MSEC);
1041 perf_evlist__enable(rec->evlist);
1044 trigger_ready(&auxtrace_snapshot_trigger);
1045 trigger_ready(&switch_output_trigger);
1046 perf_hooks__invoke_record_start();
1048 unsigned long long hits = rec->samples;
1051 * rec->evlist->bkw_mmap_state is possible to be
1052 * BKW_MMAP_EMPTY here: when done == true and
1053 * hits != rec->samples in previous round.
1055 * perf_evlist__toggle_bkw_mmap ensure we never
1056 * convert BKW_MMAP_EMPTY to BKW_MMAP_DATA_PENDING.
1058 if (trigger_is_hit(&switch_output_trigger) || done || draining)
1059 perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_DATA_PENDING);
1061 if (record__mmap_read_all(rec) < 0) {
1062 trigger_error(&auxtrace_snapshot_trigger);
1063 trigger_error(&switch_output_trigger);
1068 if (auxtrace_record__snapshot_started) {
1069 auxtrace_record__snapshot_started = 0;
1070 if (!trigger_is_error(&auxtrace_snapshot_trigger))
1071 record__read_auxtrace_snapshot(rec);
1072 if (trigger_is_error(&auxtrace_snapshot_trigger)) {
1073 pr_err("AUX area tracing snapshot failed\n");
1079 if (trigger_is_hit(&switch_output_trigger)) {
1081 * If switch_output_trigger is hit, the data in
1082 * overwritable ring buffer should have been collected,
1083 * so bkw_mmap_state should be set to BKW_MMAP_EMPTY.
1085 * If SIGUSR2 raise after or during record__mmap_read_all(),
1086 * record__mmap_read_all() didn't collect data from
1087 * overwritable ring buffer. Read again.
1089 if (rec->evlist->bkw_mmap_state == BKW_MMAP_RUNNING)
1091 trigger_ready(&switch_output_trigger);
1094 * Reenable events in overwrite ring buffer after
1095 * record__mmap_read_all(): we should have collected
1098 perf_evlist__toggle_bkw_mmap(rec->evlist, BKW_MMAP_RUNNING);
1101 fprintf(stderr, "[ perf record: dump data: Woken up %ld times ]\n",
1104 fd = record__switch_output(rec, false);
1106 pr_err("Failed to switch to new file\n");
1107 trigger_error(&switch_output_trigger);
1112 /* re-arm the alarm */
1113 if (rec->switch_output.time)
1114 alarm(rec->switch_output.time);
1117 if (hits == rec->samples) {
1118 if (done || draining)
1120 err = perf_evlist__poll(rec->evlist, -1);
1122 * Propagate error, only if there's any. Ignore positive
1123 * number of returned events and interrupt error.
1125 if (err > 0 || (err < 0 && errno == EINTR))
1129 if (perf_evlist__filter_pollfd(rec->evlist, POLLERR | POLLHUP) == 0)
1134 * When perf is starting the traced process, at the end events
1135 * die with the process and we wait for that. Thus no need to
1136 * disable events in this case.
1138 if (done && !disabled && !target__none(&opts->target)) {
1139 trigger_off(&auxtrace_snapshot_trigger);
1140 perf_evlist__disable(rec->evlist);
1144 trigger_off(&auxtrace_snapshot_trigger);
1145 trigger_off(&switch_output_trigger);
1147 if (forks && workload_exec_errno) {
1148 char msg[STRERR_BUFSIZE];
1149 const char *emsg = str_error_r(workload_exec_errno, msg, sizeof(msg));
1150 pr_err("Workload failed: %s\n", emsg);
1156 fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking);
1158 if (target__none(&rec->opts.target))
1159 record__synthesize_workload(rec, true);
1165 if (!child_finished)
1166 kill(rec->evlist->workload.pid, SIGTERM);
1172 else if (WIFEXITED(exit_status))
1173 status = WEXITSTATUS(exit_status);
1174 else if (WIFSIGNALED(exit_status))
1175 signr = WTERMSIG(exit_status);
1179 record__synthesize(rec, true);
1180 /* this will be recalculated during process_buildids() */
1184 if (!rec->timestamp_filename) {
1185 record__finish_output(rec);
1187 fd = record__switch_output(rec, true);
1190 goto out_delete_session;
1195 perf_hooks__invoke_record_end();
1197 if (!err && !quiet) {
1199 const char *postfix = rec->timestamp_filename ?
1200 ".<timestamp>" : "";
1202 if (rec->samples && !rec->opts.full_auxtrace)
1203 scnprintf(samples, sizeof(samples),
1204 " (%" PRIu64 " samples)", rec->samples);
1208 fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s%s%s ]\n",
1209 perf_data_file__size(file) / 1024.0 / 1024.0,
1210 file->path, postfix, samples);
1214 perf_session__delete(session);
1218 static void callchain_debug(struct callchain_param *callchain)
1220 static const char *str[CALLCHAIN_MAX] = { "NONE", "FP", "DWARF", "LBR" };
1222 pr_debug("callchain: type %s\n", str[callchain->record_mode]);
1224 if (callchain->record_mode == CALLCHAIN_DWARF)
1225 pr_debug("callchain: stack dump size %d\n",
1226 callchain->dump_size);
1229 int record_opts__parse_callchain(struct record_opts *record,
1230 struct callchain_param *callchain,
1231 const char *arg, bool unset)
1234 callchain->enabled = !unset;
1236 /* --no-call-graph */
1238 callchain->record_mode = CALLCHAIN_NONE;
1239 pr_debug("callchain: disabled\n");
1243 ret = parse_callchain_record_opt(arg, callchain);
1245 /* Enable data address sampling for DWARF unwind. */
1246 if (callchain->record_mode == CALLCHAIN_DWARF)
1247 record->sample_address = true;
1248 callchain_debug(callchain);
1254 int record_parse_callchain_opt(const struct option *opt,
1258 return record_opts__parse_callchain(opt->value, &callchain_param, arg, unset);
1261 int record_callchain_opt(const struct option *opt,
1262 const char *arg __maybe_unused,
1263 int unset __maybe_unused)
1265 struct callchain_param *callchain = opt->value;
1267 callchain->enabled = true;
1269 if (callchain->record_mode == CALLCHAIN_NONE)
1270 callchain->record_mode = CALLCHAIN_FP;
1272 callchain_debug(callchain);
1276 static int perf_record_config(const char *var, const char *value, void *cb)
1278 struct record *rec = cb;
1280 if (!strcmp(var, "record.build-id")) {
1281 if (!strcmp(value, "cache"))
1282 rec->no_buildid_cache = false;
1283 else if (!strcmp(value, "no-cache"))
1284 rec->no_buildid_cache = true;
1285 else if (!strcmp(value, "skip"))
1286 rec->no_buildid = true;
1291 if (!strcmp(var, "record.call-graph"))
1292 var = "call-graph.record-mode"; /* fall-through */
1294 return perf_default_config(var, value, cb);
1297 struct clockid_map {
1302 #define CLOCKID_MAP(n, c) \
1303 { .name = n, .clockid = (c), }
1305 #define CLOCKID_END { .name = NULL, }
1309 * Add the missing ones, we need to build on many distros...
1311 #ifndef CLOCK_MONOTONIC_RAW
1312 #define CLOCK_MONOTONIC_RAW 4
1314 #ifndef CLOCK_BOOTTIME
1315 #define CLOCK_BOOTTIME 7
1318 #define CLOCK_TAI 11
1321 static const struct clockid_map clockids[] = {
1322 /* available for all events, NMI safe */
1323 CLOCKID_MAP("monotonic", CLOCK_MONOTONIC),
1324 CLOCKID_MAP("monotonic_raw", CLOCK_MONOTONIC_RAW),
1326 /* available for some events */
1327 CLOCKID_MAP("realtime", CLOCK_REALTIME),
1328 CLOCKID_MAP("boottime", CLOCK_BOOTTIME),
1329 CLOCKID_MAP("tai", CLOCK_TAI),
1331 /* available for the lazy */
1332 CLOCKID_MAP("mono", CLOCK_MONOTONIC),
1333 CLOCKID_MAP("raw", CLOCK_MONOTONIC_RAW),
1334 CLOCKID_MAP("real", CLOCK_REALTIME),
1335 CLOCKID_MAP("boot", CLOCK_BOOTTIME),
1340 static int parse_clockid(const struct option *opt, const char *str, int unset)
1342 struct record_opts *opts = (struct record_opts *)opt->value;
1343 const struct clockid_map *cm;
1344 const char *ostr = str;
1347 opts->use_clockid = 0;
1355 /* no setting it twice */
1356 if (opts->use_clockid)
1359 opts->use_clockid = true;
1361 /* if its a number, we're done */
1362 if (sscanf(str, "%d", &opts->clockid) == 1)
1365 /* allow a "CLOCK_" prefix to the name */
1366 if (!strncasecmp(str, "CLOCK_", 6))
1369 for (cm = clockids; cm->name; cm++) {
1370 if (!strcasecmp(str, cm->name)) {
1371 opts->clockid = cm->clockid;
1376 opts->use_clockid = false;
1377 ui__warning("unknown clockid %s, check man page\n", ostr);
1381 static int record__parse_mmap_pages(const struct option *opt,
1383 int unset __maybe_unused)
1385 struct record_opts *opts = opt->value;
1387 unsigned int mmap_pages;
1402 ret = __perf_evlist__parse_mmap_pages(&mmap_pages, s);
1405 opts->mmap_pages = mmap_pages;
1413 ret = __perf_evlist__parse_mmap_pages(&mmap_pages, p + 1);
1417 opts->auxtrace_mmap_pages = mmap_pages;
1424 static void switch_output_size_warn(struct record *rec)
1426 u64 wakeup_size = perf_evlist__mmap_size(rec->opts.mmap_pages);
1427 struct switch_output *s = &rec->switch_output;
1431 if (s->size < wakeup_size) {
1434 unit_number__scnprintf(buf, sizeof(buf), wakeup_size);
1435 pr_warning("WARNING: switch-output data size lower than "
1436 "wakeup kernel buffer size (%s) "
1437 "expect bigger perf.data sizes\n", buf);
1441 static int switch_output_setup(struct record *rec)
1443 struct switch_output *s = &rec->switch_output;
1444 static struct parse_tag tags_size[] = {
1445 { .tag = 'B', .mult = 1 },
1446 { .tag = 'K', .mult = 1 << 10 },
1447 { .tag = 'M', .mult = 1 << 20 },
1448 { .tag = 'G', .mult = 1 << 30 },
1451 static struct parse_tag tags_time[] = {
1452 { .tag = 's', .mult = 1 },
1453 { .tag = 'm', .mult = 60 },
1454 { .tag = 'h', .mult = 60*60 },
1455 { .tag = 'd', .mult = 60*60*24 },
1463 if (!strcmp(s->str, "signal")) {
1465 pr_debug("switch-output with SIGUSR2 signal\n");
1469 val = parse_tag_value(s->str, tags_size);
1470 if (val != (unsigned long) -1) {
1472 pr_debug("switch-output with %s size threshold\n", s->str);
1476 val = parse_tag_value(s->str, tags_time);
1477 if (val != (unsigned long) -1) {
1479 pr_debug("switch-output with %s time threshold (%lu seconds)\n",
1487 rec->timestamp_filename = true;
1490 if (s->size && !rec->opts.no_buffering)
1491 switch_output_size_warn(rec);
1496 static const char * const __record_usage[] = {
1497 "perf record [<options>] [<command>]",
1498 "perf record [<options>] -- <command> [<options>]",
1501 const char * const *record_usage = __record_usage;
1504 * XXX Ideally would be local to cmd_record() and passed to a record__new
1505 * because we need to have access to it in record__exit, that is called
1506 * after cmd_record() exits, but since record_options need to be accessible to
1507 * builtin-script, leave it here.
1509 * At least we don't ouch it in all the other functions here directly.
1511 * Just say no to tons of global variables, sigh.
1513 static struct record record = {
1515 .sample_time = true,
1516 .mmap_pages = UINT_MAX,
1517 .user_freq = UINT_MAX,
1518 .user_interval = ULLONG_MAX,
1522 .default_per_cpu = true,
1524 .proc_map_timeout = 500,
1527 .sample = process_sample_event,
1528 .fork = perf_event__process_fork,
1529 .exit = perf_event__process_exit,
1530 .comm = perf_event__process_comm,
1531 .namespaces = perf_event__process_namespaces,
1532 .mmap = perf_event__process_mmap,
1533 .mmap2 = perf_event__process_mmap2,
1534 .ordered_events = true,
1538 const char record_callchain_help[] = CALLCHAIN_RECORD_HELP
1539 "\n\t\t\t\tDefault: fp";
1541 static bool dry_run;
1544 * XXX Will stay a global variable till we fix builtin-script.c to stop messing
1545 * with it and switch to use the library functions in perf_evlist that came
1546 * from builtin-record.c, i.e. use record_opts,
1547 * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record',
1550 static struct option __record_options[] = {
1551 OPT_CALLBACK('e', "event", &record.evlist, "event",
1552 "event selector. use 'perf list' to list available events",
1553 parse_events_option),
1554 OPT_CALLBACK(0, "filter", &record.evlist, "filter",
1555 "event filter", parse_filter),
1556 OPT_CALLBACK_NOOPT(0, "exclude-perf", &record.evlist,
1557 NULL, "don't record events from perf itself",
1559 OPT_STRING('p', "pid", &record.opts.target.pid, "pid",
1560 "record events on existing process id"),
1561 OPT_STRING('t', "tid", &record.opts.target.tid, "tid",
1562 "record events on existing thread id"),
1563 OPT_INTEGER('r', "realtime", &record.realtime_prio,
1564 "collect data with this RT SCHED_FIFO priority"),
1565 OPT_BOOLEAN(0, "no-buffering", &record.opts.no_buffering,
1566 "collect data without buffering"),
1567 OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples,
1568 "collect raw sample records from all opened counters"),
1569 OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide,
1570 "system-wide collection from all CPUs"),
1571 OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu",
1572 "list of cpus to monitor"),
1573 OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"),
1574 OPT_STRING('o', "output", &record.file.path, "file",
1575 "output file name"),
1576 OPT_BOOLEAN_SET('i', "no-inherit", &record.opts.no_inherit,
1577 &record.opts.no_inherit_set,
1578 "child tasks do not inherit counters"),
1579 OPT_BOOLEAN(0, "tail-synthesize", &record.opts.tail_synthesize,
1580 "synthesize non-sample events at the end of output"),
1581 OPT_BOOLEAN(0, "overwrite", &record.opts.overwrite, "use overwrite mode"),
1582 OPT_UINTEGER('F', "freq", &record.opts.user_freq, "profile at this frequency"),
1583 OPT_CALLBACK('m', "mmap-pages", &record.opts, "pages[,pages]",
1584 "number of mmap data pages and AUX area tracing mmap pages",
1585 record__parse_mmap_pages),
1586 OPT_BOOLEAN(0, "group", &record.opts.group,
1587 "put the counters into a counter group"),
1588 OPT_CALLBACK_NOOPT('g', NULL, &callchain_param,
1589 NULL, "enables call-graph recording" ,
1590 &record_callchain_opt),
1591 OPT_CALLBACK(0, "call-graph", &record.opts,
1592 "record_mode[,record_size]", record_callchain_help,
1593 &record_parse_callchain_opt),
1594 OPT_INCR('v', "verbose", &verbose,
1595 "be more verbose (show counter open errors, etc)"),
1596 OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"),
1597 OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat,
1598 "per thread counts"),
1599 OPT_BOOLEAN('d', "data", &record.opts.sample_address, "Record the sample addresses"),
1600 OPT_BOOLEAN(0, "sample-cpu", &record.opts.sample_cpu, "Record the sample cpu"),
1601 OPT_BOOLEAN_SET('T', "timestamp", &record.opts.sample_time,
1602 &record.opts.sample_time_set,
1603 "Record the sample timestamps"),
1604 OPT_BOOLEAN('P', "period", &record.opts.period, "Record the sample period"),
1605 OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples,
1607 OPT_BOOLEAN_SET('N', "no-buildid-cache", &record.no_buildid_cache,
1608 &record.no_buildid_cache_set,
1609 "do not update the buildid cache"),
1610 OPT_BOOLEAN_SET('B', "no-buildid", &record.no_buildid,
1611 &record.no_buildid_set,
1612 "do not collect buildids in perf.data"),
1613 OPT_CALLBACK('G', "cgroup", &record.evlist, "name",
1614 "monitor event in cgroup name only",
1616 OPT_UINTEGER('D', "delay", &record.opts.initial_delay,
1617 "ms to wait before starting measurement after program start"),
1618 OPT_STRING('u', "uid", &record.opts.target.uid_str, "user",
1621 OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack,
1622 "branch any", "sample any taken branches",
1623 parse_branch_stack),
1625 OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack,
1626 "branch filter mask", "branch stack filter modes",
1627 parse_branch_stack),
1628 OPT_BOOLEAN('W', "weight", &record.opts.sample_weight,
1629 "sample by weight (on special events only)"),
1630 OPT_BOOLEAN(0, "transaction", &record.opts.sample_transaction,
1631 "sample transaction flags (special events only)"),
1632 OPT_BOOLEAN(0, "per-thread", &record.opts.target.per_thread,
1633 "use per-thread mmaps"),
1634 OPT_CALLBACK_OPTARG('I', "intr-regs", &record.opts.sample_intr_regs, NULL, "any register",
1635 "sample selected machine registers on interrupt,"
1636 " use -I ? to list register names", parse_regs),
1637 OPT_BOOLEAN(0, "running-time", &record.opts.running_time,
1638 "Record running/enabled time of read (:S) events"),
1639 OPT_CALLBACK('k', "clockid", &record.opts,
1640 "clockid", "clockid to use for events, see clock_gettime()",
1642 OPT_STRING_OPTARG('S', "snapshot", &record.opts.auxtrace_snapshot_opts,
1643 "opts", "AUX area tracing Snapshot Mode", ""),
1644 OPT_UINTEGER(0, "proc-map-timeout", &record.opts.proc_map_timeout,
1645 "per thread proc mmap processing timeout in ms"),
1646 OPT_BOOLEAN(0, "namespaces", &record.opts.record_namespaces,
1647 "Record namespaces events"),
1648 OPT_BOOLEAN(0, "switch-events", &record.opts.record_switch_events,
1649 "Record context switch events"),
1650 OPT_BOOLEAN_FLAG(0, "all-kernel", &record.opts.all_kernel,
1651 "Configure all used events to run in kernel space.",
1652 PARSE_OPT_EXCLUSIVE),
1653 OPT_BOOLEAN_FLAG(0, "all-user", &record.opts.all_user,
1654 "Configure all used events to run in user space.",
1655 PARSE_OPT_EXCLUSIVE),
1656 OPT_STRING(0, "clang-path", &llvm_param.clang_path, "clang path",
1657 "clang binary to use for compiling BPF scriptlets"),
1658 OPT_STRING(0, "clang-opt", &llvm_param.clang_opt, "clang options",
1659 "options passed to clang when compiling BPF scriptlets"),
1660 OPT_STRING(0, "vmlinux", &symbol_conf.vmlinux_name,
1661 "file", "vmlinux pathname"),
1662 OPT_BOOLEAN(0, "buildid-all", &record.buildid_all,
1663 "Record build-id of all DSOs regardless of hits"),
1664 OPT_BOOLEAN(0, "timestamp-filename", &record.timestamp_filename,
1665 "append timestamp to output filename"),
1666 OPT_STRING_OPTARG_SET(0, "switch-output", &record.switch_output.str,
1667 &record.switch_output.set, "signal,size,time",
1668 "Switch output when receive SIGUSR2 or cross size,time threshold",
1670 OPT_BOOLEAN(0, "dry-run", &dry_run,
1671 "Parse options then exit"),
1675 struct option *record_options = __record_options;
1677 int cmd_record(int argc, const char **argv)
1680 struct record *rec = &record;
1681 char errbuf[BUFSIZ];
1683 #ifndef HAVE_LIBBPF_SUPPORT
1684 # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, "NO_LIBBPF=1", c)
1685 set_nobuild('\0', "clang-path", true);
1686 set_nobuild('\0', "clang-opt", true);
1690 #ifndef HAVE_BPF_PROLOGUE
1691 # if !defined (HAVE_DWARF_SUPPORT)
1692 # define REASON "NO_DWARF=1"
1693 # elif !defined (HAVE_LIBBPF_SUPPORT)
1694 # define REASON "NO_LIBBPF=1"
1696 # define REASON "this architecture doesn't support BPF prologue"
1698 # define set_nobuild(s, l, c) set_option_nobuild(record_options, s, l, REASON, c)
1699 set_nobuild('\0', "vmlinux", true);
1704 rec->evlist = perf_evlist__new();
1705 if (rec->evlist == NULL)
1708 err = perf_config(perf_record_config, rec);
1712 argc = parse_options(argc, argv, record_options, record_usage,
1713 PARSE_OPT_STOP_AT_NON_OPTION);
1715 perf_quiet_option();
1717 /* Make system wide (-a) the default target. */
1718 if (!argc && target__none(&rec->opts.target))
1719 rec->opts.target.system_wide = true;
1721 if (nr_cgroups && !rec->opts.target.system_wide) {
1722 usage_with_options_msg(record_usage, record_options,
1723 "cgroup monitoring only available in system-wide mode");
1726 if (rec->opts.record_switch_events &&
1727 !perf_can_record_switch_events()) {
1728 ui__error("kernel does not support recording context switch events\n");
1729 parse_options_usage(record_usage, record_options, "switch-events", 0);
1733 if (switch_output_setup(rec)) {
1734 parse_options_usage(record_usage, record_options, "switch-output", 0);
1738 if (rec->switch_output.time) {
1739 signal(SIGALRM, alarm_sig_handler);
1740 alarm(rec->switch_output.time);
1744 rec->itr = auxtrace_record__init(rec->evlist, &err);
1749 err = auxtrace_parse_snapshot_options(rec->itr, &rec->opts,
1750 rec->opts.auxtrace_snapshot_opts);
1755 * Allow aliases to facilitate the lookup of symbols for address
1756 * filters. Refer to auxtrace_parse_filters().
1758 symbol_conf.allow_aliases = true;
1762 err = auxtrace_parse_filters(rec->evlist);
1769 err = bpf__setup_stdout(rec->evlist);
1771 bpf__strerror_setup_stdout(rec->evlist, err, errbuf, sizeof(errbuf));
1772 pr_err("ERROR: Setup BPF stdout failed: %s\n",
1779 if (symbol_conf.kptr_restrict)
1781 "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n"
1782 "check /proc/sys/kernel/kptr_restrict.\n\n"
1783 "Samples in kernel functions may not be resolved if a suitable vmlinux\n"
1784 "file is not found in the buildid cache or in the vmlinux path.\n\n"
1785 "Samples in kernel modules won't be resolved at all.\n\n"
1786 "If some relocation was applied (e.g. kexec) symbols may be misresolved\n"
1787 "even with a suitable vmlinux or kallsyms file.\n\n");
1789 if (rec->no_buildid_cache || rec->no_buildid) {
1790 disable_buildid_cache();
1791 } else if (rec->switch_output.enabled) {
1793 * In 'perf record --switch-output', disable buildid
1794 * generation by default to reduce data file switching
1795 * overhead. Still generate buildid if they are required
1798 * perf record --switch-output --no-no-buildid \
1799 * --no-no-buildid-cache
1801 * Following code equals to:
1803 * if ((rec->no_buildid || !rec->no_buildid_set) &&
1804 * (rec->no_buildid_cache || !rec->no_buildid_cache_set))
1805 * disable_buildid_cache();
1807 bool disable = true;
1809 if (rec->no_buildid_set && !rec->no_buildid)
1811 if (rec->no_buildid_cache_set && !rec->no_buildid_cache)
1814 rec->no_buildid = true;
1815 rec->no_buildid_cache = true;
1816 disable_buildid_cache();
1820 if (record.opts.overwrite)
1821 record.opts.tail_synthesize = true;
1823 if (rec->evlist->nr_entries == 0 &&
1824 perf_evlist__add_default(rec->evlist) < 0) {
1825 pr_err("Not enough memory for event selector list\n");
1829 if (rec->opts.target.tid && !rec->opts.no_inherit_set)
1830 rec->opts.no_inherit = true;
1832 err = target__validate(&rec->opts.target);
1834 target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
1835 ui__warning("%s", errbuf);
1838 err = target__parse_uid(&rec->opts.target);
1840 int saved_errno = errno;
1842 target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
1843 ui__error("%s", errbuf);
1849 /* Enable ignoring missing threads when -u option is defined. */
1850 rec->opts.ignore_missing_thread = rec->opts.target.uid != UINT_MAX;
1853 if (perf_evlist__create_maps(rec->evlist, &rec->opts.target) < 0)
1854 usage_with_options(record_usage, record_options);
1856 err = auxtrace_record__options(rec->itr, rec->evlist, &rec->opts);
1861 * We take all buildids when the file contains
1862 * AUX area tracing data because we do not decode the
1863 * trace because it would take too long.
1865 if (rec->opts.full_auxtrace)
1866 rec->buildid_all = true;
1868 if (record_opts__config(&rec->opts)) {
1873 err = __cmd_record(&record, argc, argv);
1875 perf_evlist__delete(rec->evlist);
1877 auxtrace_record__free(rec->itr);
1881 static void snapshot_sig_handler(int sig __maybe_unused)
1883 struct record *rec = &record;
1885 if (trigger_is_ready(&auxtrace_snapshot_trigger)) {
1886 trigger_hit(&auxtrace_snapshot_trigger);
1887 auxtrace_record__snapshot_started = 1;
1888 if (auxtrace_record__snapshot_start(record.itr))
1889 trigger_error(&auxtrace_snapshot_trigger);
1892 if (switch_output_signal(rec))
1893 trigger_hit(&switch_output_trigger);
1896 static void alarm_sig_handler(int sig __maybe_unused)
1898 struct record *rec = &record;
1900 if (switch_output_time(rec))
1901 trigger_hit(&switch_output_trigger);