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 "util/parse-options.h"
15 #include "util/parse-events.h"
17 #include "util/callchain.h"
18 #include "util/cgroup.h"
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/tool.h"
26 #include "util/symbol.h"
27 #include "util/cpumap.h"
28 #include "util/thread_map.h"
29 #include "util/data.h"
30 #include "util/auxtrace.h"
31 #include "util/parse-branch-options.h"
39 struct perf_tool tool;
40 struct record_opts opts;
42 struct perf_data_file file;
43 struct auxtrace_record *itr;
44 struct perf_evlist *evlist;
45 struct perf_session *session;
49 bool no_buildid_cache;
53 static int record__write(struct record *rec, void *bf, size_t size)
55 if (perf_data_file__write(rec->session->file, bf, size) < 0) {
56 pr_err("failed to write perf data, error: %m\n");
60 rec->bytes_written += size;
64 static int process_synthesized_event(struct perf_tool *tool,
65 union perf_event *event,
66 struct perf_sample *sample __maybe_unused,
67 struct machine *machine __maybe_unused)
69 struct record *rec = container_of(tool, struct record, tool);
70 return record__write(rec, event, event->header.size);
73 static int record__mmap_read(struct record *rec, int idx)
75 struct perf_mmap *md = &rec->evlist->mmap[idx];
76 u64 head = perf_mmap__read_head(md);
78 unsigned char *data = md->base + page_size;
90 if ((old & md->mask) + size != (head & md->mask)) {
91 buf = &data[old & md->mask];
92 size = md->mask + 1 - (old & md->mask);
95 if (record__write(rec, buf, size) < 0) {
101 buf = &data[old & md->mask];
105 if (record__write(rec, buf, size) < 0) {
111 perf_evlist__mmap_consume(rec->evlist, idx);
116 static volatile int done;
117 static volatile int signr = -1;
118 static volatile int child_finished;
119 static volatile int auxtrace_snapshot_enabled;
120 static volatile int auxtrace_snapshot_err;
121 static volatile int auxtrace_record__snapshot_started;
123 static void sig_handler(int sig)
133 static void record__sig_exit(void)
138 signal(signr, SIG_DFL);
142 #ifdef HAVE_AUXTRACE_SUPPORT
144 static int record__process_auxtrace(struct perf_tool *tool,
145 union perf_event *event, void *data1,
146 size_t len1, void *data2, size_t len2)
148 struct record *rec = container_of(tool, struct record, tool);
149 struct perf_data_file *file = &rec->file;
153 if (!perf_data_file__is_pipe(file)) {
155 int fd = perf_data_file__fd(file);
158 file_offset = lseek(fd, 0, SEEK_CUR);
159 if (file_offset == -1)
161 err = auxtrace_index__auxtrace_event(&rec->session->auxtrace_index,
167 /* event.auxtrace.size includes padding, see __auxtrace_mmap__read() */
168 padding = (len1 + len2) & 7;
170 padding = 8 - padding;
172 record__write(rec, event, event->header.size);
173 record__write(rec, data1, len1);
175 record__write(rec, data2, len2);
176 record__write(rec, &pad, padding);
181 static int record__auxtrace_mmap_read(struct record *rec,
182 struct auxtrace_mmap *mm)
186 ret = auxtrace_mmap__read(mm, rec->itr, &rec->tool,
187 record__process_auxtrace);
197 static int record__auxtrace_mmap_read_snapshot(struct record *rec,
198 struct auxtrace_mmap *mm)
202 ret = auxtrace_mmap__read_snapshot(mm, rec->itr, &rec->tool,
203 record__process_auxtrace,
204 rec->opts.auxtrace_snapshot_size);
214 static int record__auxtrace_read_snapshot_all(struct record *rec)
219 for (i = 0; i < rec->evlist->nr_mmaps; i++) {
220 struct auxtrace_mmap *mm =
221 &rec->evlist->mmap[i].auxtrace_mmap;
226 if (record__auxtrace_mmap_read_snapshot(rec, mm) != 0) {
235 static void record__read_auxtrace_snapshot(struct record *rec)
237 pr_debug("Recording AUX area tracing snapshot\n");
238 if (record__auxtrace_read_snapshot_all(rec) < 0) {
239 auxtrace_snapshot_err = -1;
241 auxtrace_snapshot_err = auxtrace_record__snapshot_finish(rec->itr);
242 if (!auxtrace_snapshot_err)
243 auxtrace_snapshot_enabled = 1;
250 int record__auxtrace_mmap_read(struct record *rec __maybe_unused,
251 struct auxtrace_mmap *mm __maybe_unused)
257 void record__read_auxtrace_snapshot(struct record *rec __maybe_unused)
262 int auxtrace_record__snapshot_start(struct auxtrace_record *itr __maybe_unused)
269 static int record__open(struct record *rec)
272 struct perf_evsel *pos;
273 struct perf_evlist *evlist = rec->evlist;
274 struct perf_session *session = rec->session;
275 struct record_opts *opts = &rec->opts;
278 perf_evlist__config(evlist, opts);
280 evlist__for_each(evlist, pos) {
282 if (perf_evsel__open(pos, evlist->cpus, evlist->threads) < 0) {
283 if (perf_evsel__fallback(pos, errno, msg, sizeof(msg))) {
285 ui__warning("%s\n", msg);
290 perf_evsel__open_strerror(pos, &opts->target,
291 errno, msg, sizeof(msg));
292 ui__error("%s\n", msg);
297 if (perf_evlist__apply_filters(evlist, &pos)) {
298 error("failed to set filter \"%s\" on event %s with %d (%s)\n",
299 pos->filter, perf_evsel__name(pos), errno,
300 strerror_r(errno, msg, sizeof(msg)));
305 if (perf_evlist__mmap_ex(evlist, opts->mmap_pages, false,
306 opts->auxtrace_mmap_pages,
307 opts->auxtrace_snapshot_mode) < 0) {
308 if (errno == EPERM) {
309 pr_err("Permission error mapping pages.\n"
310 "Consider increasing "
311 "/proc/sys/kernel/perf_event_mlock_kb,\n"
312 "or try again with a smaller value of -m/--mmap_pages.\n"
313 "(current value: %u,%u)\n",
314 opts->mmap_pages, opts->auxtrace_mmap_pages);
317 pr_err("failed to mmap with %d (%s)\n", errno,
318 strerror_r(errno, msg, sizeof(msg)));
324 session->evlist = evlist;
325 perf_session__set_id_hdr_size(session);
330 static int process_sample_event(struct perf_tool *tool,
331 union perf_event *event,
332 struct perf_sample *sample,
333 struct perf_evsel *evsel,
334 struct machine *machine)
336 struct record *rec = container_of(tool, struct record, tool);
340 return build_id__mark_dso_hit(tool, event, sample, evsel, machine);
343 static int process_buildids(struct record *rec)
345 struct perf_data_file *file = &rec->file;
346 struct perf_session *session = rec->session;
352 * During this process, it'll load kernel map and replace the
353 * dso->long_name to a real pathname it found. In this case
354 * we prefer the vmlinux path like
355 * /lib/modules/3.16.4/build/vmlinux
357 * rather than build-id path (in debug directory).
358 * $HOME/.debug/.build-id/f0/6e17aa50adf4d00b88925e03775de107611551
360 symbol_conf.ignore_vmlinux_buildid = true;
362 return perf_session__process_events(session);
365 static void perf_event__synthesize_guest_os(struct machine *machine, void *data)
368 struct perf_tool *tool = data;
370 *As for guest kernel when processing subcommand record&report,
371 *we arrange module mmap prior to guest kernel mmap and trigger
372 *a preload dso because default guest module symbols are loaded
373 *from guest kallsyms instead of /lib/modules/XXX/XXX. This
374 *method is used to avoid symbol missing when the first addr is
375 *in module instead of in guest kernel.
377 err = perf_event__synthesize_modules(tool, process_synthesized_event,
380 pr_err("Couldn't record guest kernel [%d]'s reference"
381 " relocation symbol.\n", machine->pid);
384 * We use _stext for guest kernel because guest kernel's /proc/kallsyms
385 * have no _text sometimes.
387 err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
390 pr_err("Couldn't record guest kernel [%d]'s reference"
391 " relocation symbol.\n", machine->pid);
394 static struct perf_event_header finished_round_event = {
395 .size = sizeof(struct perf_event_header),
396 .type = PERF_RECORD_FINISHED_ROUND,
399 static int record__mmap_read_all(struct record *rec)
401 u64 bytes_written = rec->bytes_written;
405 for (i = 0; i < rec->evlist->nr_mmaps; i++) {
406 struct auxtrace_mmap *mm = &rec->evlist->mmap[i].auxtrace_mmap;
408 if (rec->evlist->mmap[i].base) {
409 if (record__mmap_read(rec, i) != 0) {
415 if (mm->base && !rec->opts.auxtrace_snapshot_mode &&
416 record__auxtrace_mmap_read(rec, mm) != 0) {
423 * Mark the round finished in case we wrote
424 * at least one event.
426 if (bytes_written != rec->bytes_written)
427 rc = record__write(rec, &finished_round_event, sizeof(finished_round_event));
433 static void record__init_features(struct record *rec)
435 struct perf_session *session = rec->session;
438 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
439 perf_header__set_feat(&session->header, feat);
442 perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
444 if (!have_tracepoints(&rec->evlist->entries))
445 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
447 if (!rec->opts.branch_stack)
448 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
450 if (!rec->opts.full_auxtrace)
451 perf_header__clear_feat(&session->header, HEADER_AUXTRACE);
454 static volatile int workload_exec_errno;
457 * perf_evlist__prepare_workload will send a SIGUSR1
458 * if the fork fails, since we asked by setting its
459 * want_signal to true.
461 static void workload_exec_failed_signal(int signo __maybe_unused,
463 void *ucontext __maybe_unused)
465 workload_exec_errno = info->si_value.sival_int;
470 static void snapshot_sig_handler(int sig);
472 static int __cmd_record(struct record *rec, int argc, const char **argv)
476 unsigned long waking = 0;
477 const bool forks = argc > 0;
478 struct machine *machine;
479 struct perf_tool *tool = &rec->tool;
480 struct record_opts *opts = &rec->opts;
481 struct perf_data_file *file = &rec->file;
482 struct perf_session *session;
483 bool disabled = false, draining = false;
486 rec->progname = argv[0];
488 atexit(record__sig_exit);
489 signal(SIGCHLD, sig_handler);
490 signal(SIGINT, sig_handler);
491 signal(SIGTERM, sig_handler);
492 if (rec->opts.auxtrace_snapshot_mode)
493 signal(SIGUSR2, snapshot_sig_handler);
495 signal(SIGUSR2, SIG_IGN);
497 session = perf_session__new(file, false, tool);
498 if (session == NULL) {
499 pr_err("Perf session creation failed.\n");
503 fd = perf_data_file__fd(file);
504 rec->session = session;
506 record__init_features(rec);
509 err = perf_evlist__prepare_workload(rec->evlist, &opts->target,
511 workload_exec_failed_signal);
513 pr_err("Couldn't run the workload!\n");
515 goto out_delete_session;
519 if (record__open(rec) != 0) {
525 * Normally perf_session__new would do this, but it doesn't have the
528 if (rec->tool.ordered_events && !perf_evlist__sample_id_all(rec->evlist)) {
529 pr_warning("WARNING: No sample_id_all support, falling back to unordered processing\n");
530 rec->tool.ordered_events = false;
533 if (!rec->evlist->nr_groups)
534 perf_header__clear_feat(&session->header, HEADER_GROUP_DESC);
537 err = perf_header__write_pipe(fd);
541 err = perf_session__write_header(session, rec->evlist, fd, false);
547 && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) {
548 pr_err("Couldn't generate buildids. "
549 "Use --no-buildid to profile anyway.\n");
554 machine = &session->machines.host;
557 err = perf_event__synthesize_attrs(tool, session,
558 process_synthesized_event);
560 pr_err("Couldn't synthesize attrs.\n");
564 if (have_tracepoints(&rec->evlist->entries)) {
566 * FIXME err <= 0 here actually means that
567 * there were no tracepoints so its not really
568 * an error, just that we don't need to
569 * synthesize anything. We really have to
570 * return this more properly and also
571 * propagate errors that now are calling die()
573 err = perf_event__synthesize_tracing_data(tool, fd, rec->evlist,
574 process_synthesized_event);
576 pr_err("Couldn't record tracing data.\n");
579 rec->bytes_written += err;
583 if (rec->opts.full_auxtrace) {
584 err = perf_event__synthesize_auxtrace_info(rec->itr, tool,
585 session, process_synthesized_event);
587 goto out_delete_session;
590 err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
593 pr_err("Couldn't record kernel reference relocation symbol\n"
594 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
595 "Check /proc/kallsyms permission or run as root.\n");
597 err = perf_event__synthesize_modules(tool, process_synthesized_event,
600 pr_err("Couldn't record kernel module information.\n"
601 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
602 "Check /proc/modules permission or run as root.\n");
605 machines__process_guests(&session->machines,
606 perf_event__synthesize_guest_os, tool);
609 err = __machine__synthesize_threads(machine, tool, &opts->target, rec->evlist->threads,
610 process_synthesized_event, opts->sample_address,
611 opts->proc_map_timeout);
615 if (rec->realtime_prio) {
616 struct sched_param param;
618 param.sched_priority = rec->realtime_prio;
619 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
620 pr_err("Could not set realtime priority.\n");
627 * When perf is starting the traced process, all the events
628 * (apart from group members) have enable_on_exec=1 set,
629 * so don't spoil it by prematurely enabling them.
631 if (!target__none(&opts->target) && !opts->initial_delay)
632 perf_evlist__enable(rec->evlist);
638 perf_evlist__start_workload(rec->evlist);
640 if (opts->initial_delay) {
641 usleep(opts->initial_delay * 1000);
642 perf_evlist__enable(rec->evlist);
645 auxtrace_snapshot_enabled = 1;
647 int hits = rec->samples;
649 if (record__mmap_read_all(rec) < 0) {
650 auxtrace_snapshot_enabled = 0;
655 if (auxtrace_record__snapshot_started) {
656 auxtrace_record__snapshot_started = 0;
657 if (!auxtrace_snapshot_err)
658 record__read_auxtrace_snapshot(rec);
659 if (auxtrace_snapshot_err) {
660 pr_err("AUX area tracing snapshot failed\n");
666 if (hits == rec->samples) {
667 if (done || draining)
669 err = perf_evlist__poll(rec->evlist, -1);
671 * Propagate error, only if there's any. Ignore positive
672 * number of returned events and interrupt error.
674 if (err > 0 || (err < 0 && errno == EINTR))
678 if (perf_evlist__filter_pollfd(rec->evlist, POLLERR | POLLHUP) == 0)
683 * When perf is starting the traced process, at the end events
684 * die with the process and we wait for that. Thus no need to
685 * disable events in this case.
687 if (done && !disabled && !target__none(&opts->target)) {
688 auxtrace_snapshot_enabled = 0;
689 perf_evlist__disable(rec->evlist);
693 auxtrace_snapshot_enabled = 0;
695 if (forks && workload_exec_errno) {
696 char msg[STRERR_BUFSIZE];
697 const char *emsg = strerror_r(workload_exec_errno, msg, sizeof(msg));
698 pr_err("Workload failed: %s\n", emsg);
704 fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking);
711 kill(rec->evlist->workload.pid, SIGTERM);
717 else if (WIFEXITED(exit_status))
718 status = WEXITSTATUS(exit_status);
719 else if (WIFSIGNALED(exit_status))
720 signr = WTERMSIG(exit_status);
724 /* this will be recalculated during process_buildids() */
727 if (!err && !file->is_pipe) {
728 rec->session->header.data_size += rec->bytes_written;
729 file->size = lseek(perf_data_file__fd(file), 0, SEEK_CUR);
731 if (!rec->no_buildid) {
732 process_buildids(rec);
734 * We take all buildids when the file contains
735 * AUX area tracing data because we do not decode the
736 * trace because it would take too long.
738 if (rec->opts.full_auxtrace)
739 dsos__hit_all(rec->session);
741 perf_session__write_header(rec->session, rec->evlist, fd, true);
744 if (!err && !quiet) {
747 if (rec->samples && !rec->opts.full_auxtrace)
748 scnprintf(samples, sizeof(samples),
749 " (%" PRIu64 " samples)", rec->samples);
753 fprintf(stderr, "[ perf record: Captured and wrote %.3f MB %s%s ]\n",
754 perf_data_file__size(file) / 1024.0 / 1024.0,
755 file->path, samples);
759 perf_session__delete(session);
763 static void callchain_debug(void)
765 static const char *str[CALLCHAIN_MAX] = { "NONE", "FP", "DWARF", "LBR" };
767 pr_debug("callchain: type %s\n", str[callchain_param.record_mode]);
769 if (callchain_param.record_mode == CALLCHAIN_DWARF)
770 pr_debug("callchain: stack dump size %d\n",
771 callchain_param.dump_size);
774 int record_parse_callchain_opt(const struct option *opt,
779 struct record_opts *record = (struct record_opts *)opt->value;
781 record->callgraph_set = true;
782 callchain_param.enabled = !unset;
784 /* --no-call-graph */
786 callchain_param.record_mode = CALLCHAIN_NONE;
787 pr_debug("callchain: disabled\n");
791 ret = parse_callchain_record_opt(arg, &callchain_param);
798 int record_callchain_opt(const struct option *opt,
799 const char *arg __maybe_unused,
800 int unset __maybe_unused)
802 struct record_opts *record = (struct record_opts *)opt->value;
804 record->callgraph_set = true;
805 callchain_param.enabled = true;
807 if (callchain_param.record_mode == CALLCHAIN_NONE)
808 callchain_param.record_mode = CALLCHAIN_FP;
814 static int perf_record_config(const char *var, const char *value, void *cb)
816 if (!strcmp(var, "record.call-graph"))
817 var = "call-graph.record-mode"; /* fall-through */
819 return perf_default_config(var, value, cb);
827 #define CLOCKID_MAP(n, c) \
828 { .name = n, .clockid = (c), }
830 #define CLOCKID_END { .name = NULL, }
834 * Add the missing ones, we need to build on many distros...
836 #ifndef CLOCK_MONOTONIC_RAW
837 #define CLOCK_MONOTONIC_RAW 4
839 #ifndef CLOCK_BOOTTIME
840 #define CLOCK_BOOTTIME 7
846 static const struct clockid_map clockids[] = {
847 /* available for all events, NMI safe */
848 CLOCKID_MAP("monotonic", CLOCK_MONOTONIC),
849 CLOCKID_MAP("monotonic_raw", CLOCK_MONOTONIC_RAW),
851 /* available for some events */
852 CLOCKID_MAP("realtime", CLOCK_REALTIME),
853 CLOCKID_MAP("boottime", CLOCK_BOOTTIME),
854 CLOCKID_MAP("tai", CLOCK_TAI),
856 /* available for the lazy */
857 CLOCKID_MAP("mono", CLOCK_MONOTONIC),
858 CLOCKID_MAP("raw", CLOCK_MONOTONIC_RAW),
859 CLOCKID_MAP("real", CLOCK_REALTIME),
860 CLOCKID_MAP("boot", CLOCK_BOOTTIME),
865 static int parse_clockid(const struct option *opt, const char *str, int unset)
867 struct record_opts *opts = (struct record_opts *)opt->value;
868 const struct clockid_map *cm;
869 const char *ostr = str;
872 opts->use_clockid = 0;
880 /* no setting it twice */
881 if (opts->use_clockid)
884 opts->use_clockid = true;
886 /* if its a number, we're done */
887 if (sscanf(str, "%d", &opts->clockid) == 1)
890 /* allow a "CLOCK_" prefix to the name */
891 if (!strncasecmp(str, "CLOCK_", 6))
894 for (cm = clockids; cm->name; cm++) {
895 if (!strcasecmp(str, cm->name)) {
896 opts->clockid = cm->clockid;
901 opts->use_clockid = false;
902 ui__warning("unknown clockid %s, check man page\n", ostr);
906 static int record__parse_mmap_pages(const struct option *opt,
908 int unset __maybe_unused)
910 struct record_opts *opts = opt->value;
912 unsigned int mmap_pages;
927 ret = __perf_evlist__parse_mmap_pages(&mmap_pages, s);
930 opts->mmap_pages = mmap_pages;
938 ret = __perf_evlist__parse_mmap_pages(&mmap_pages, p + 1);
942 opts->auxtrace_mmap_pages = mmap_pages;
949 static const char * const __record_usage[] = {
950 "perf record [<options>] [<command>]",
951 "perf record [<options>] -- <command> [<options>]",
954 const char * const *record_usage = __record_usage;
957 * XXX Ideally would be local to cmd_record() and passed to a record__new
958 * because we need to have access to it in record__exit, that is called
959 * after cmd_record() exits, but since record_options need to be accessible to
960 * builtin-script, leave it here.
962 * At least we don't ouch it in all the other functions here directly.
964 * Just say no to tons of global variables, sigh.
966 static struct record record = {
969 .mmap_pages = UINT_MAX,
970 .user_freq = UINT_MAX,
971 .user_interval = ULLONG_MAX,
975 .default_per_cpu = true,
977 .proc_map_timeout = 500,
980 .sample = process_sample_event,
981 .fork = perf_event__process_fork,
982 .exit = perf_event__process_exit,
983 .comm = perf_event__process_comm,
984 .mmap = perf_event__process_mmap,
985 .mmap2 = perf_event__process_mmap2,
986 .ordered_events = true,
990 #define CALLCHAIN_HELP "setup and enables call-graph (stack chain/backtrace) recording: "
992 #ifdef HAVE_DWARF_UNWIND_SUPPORT
993 const char record_callchain_help[] = CALLCHAIN_HELP "fp dwarf lbr";
995 const char record_callchain_help[] = CALLCHAIN_HELP "fp lbr";
999 * XXX Will stay a global variable till we fix builtin-script.c to stop messing
1000 * with it and switch to use the library functions in perf_evlist that came
1001 * from builtin-record.c, i.e. use record_opts,
1002 * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record',
1005 struct option __record_options[] = {
1006 OPT_CALLBACK('e', "event", &record.evlist, "event",
1007 "event selector. use 'perf list' to list available events",
1008 parse_events_option),
1009 OPT_CALLBACK(0, "filter", &record.evlist, "filter",
1010 "event filter", parse_filter),
1011 OPT_CALLBACK_NOOPT(0, "exclude-perf", &record.evlist,
1012 NULL, "don't record events from perf itself",
1014 OPT_STRING('p', "pid", &record.opts.target.pid, "pid",
1015 "record events on existing process id"),
1016 OPT_STRING('t', "tid", &record.opts.target.tid, "tid",
1017 "record events on existing thread id"),
1018 OPT_INTEGER('r', "realtime", &record.realtime_prio,
1019 "collect data with this RT SCHED_FIFO priority"),
1020 OPT_BOOLEAN(0, "no-buffering", &record.opts.no_buffering,
1021 "collect data without buffering"),
1022 OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples,
1023 "collect raw sample records from all opened counters"),
1024 OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide,
1025 "system-wide collection from all CPUs"),
1026 OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu",
1027 "list of cpus to monitor"),
1028 OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"),
1029 OPT_STRING('o', "output", &record.file.path, "file",
1030 "output file name"),
1031 OPT_BOOLEAN_SET('i', "no-inherit", &record.opts.no_inherit,
1032 &record.opts.no_inherit_set,
1033 "child tasks do not inherit counters"),
1034 OPT_UINTEGER('F', "freq", &record.opts.user_freq, "profile at this frequency"),
1035 OPT_CALLBACK('m', "mmap-pages", &record.opts, "pages[,pages]",
1036 "number of mmap data pages and AUX area tracing mmap pages",
1037 record__parse_mmap_pages),
1038 OPT_BOOLEAN(0, "group", &record.opts.group,
1039 "put the counters into a counter group"),
1040 OPT_CALLBACK_NOOPT('g', NULL, &record.opts,
1041 NULL, "enables call-graph recording" ,
1042 &record_callchain_opt),
1043 OPT_CALLBACK(0, "call-graph", &record.opts,
1044 "mode[,dump_size]", record_callchain_help,
1045 &record_parse_callchain_opt),
1046 OPT_INCR('v', "verbose", &verbose,
1047 "be more verbose (show counter open errors, etc)"),
1048 OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"),
1049 OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat,
1050 "per thread counts"),
1051 OPT_BOOLEAN('d', "data", &record.opts.sample_address, "Record the sample addresses"),
1052 OPT_BOOLEAN_SET('T', "timestamp", &record.opts.sample_time,
1053 &record.opts.sample_time_set,
1054 "Record the sample timestamps"),
1055 OPT_BOOLEAN('P', "period", &record.opts.period, "Record the sample period"),
1056 OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples,
1058 OPT_BOOLEAN('N', "no-buildid-cache", &record.no_buildid_cache,
1059 "do not update the buildid cache"),
1060 OPT_BOOLEAN('B', "no-buildid", &record.no_buildid,
1061 "do not collect buildids in perf.data"),
1062 OPT_CALLBACK('G', "cgroup", &record.evlist, "name",
1063 "monitor event in cgroup name only",
1065 OPT_UINTEGER('D', "delay", &record.opts.initial_delay,
1066 "ms to wait before starting measurement after program start"),
1067 OPT_STRING('u', "uid", &record.opts.target.uid_str, "user",
1070 OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack,
1071 "branch any", "sample any taken branches",
1072 parse_branch_stack),
1074 OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack,
1075 "branch filter mask", "branch stack filter modes",
1076 parse_branch_stack),
1077 OPT_BOOLEAN('W', "weight", &record.opts.sample_weight,
1078 "sample by weight (on special events only)"),
1079 OPT_BOOLEAN(0, "transaction", &record.opts.sample_transaction,
1080 "sample transaction flags (special events only)"),
1081 OPT_BOOLEAN(0, "per-thread", &record.opts.target.per_thread,
1082 "use per-thread mmaps"),
1083 OPT_BOOLEAN('I', "intr-regs", &record.opts.sample_intr_regs,
1084 "Sample machine registers on interrupt"),
1085 OPT_BOOLEAN(0, "running-time", &record.opts.running_time,
1086 "Record running/enabled time of read (:S) events"),
1087 OPT_CALLBACK('k', "clockid", &record.opts,
1088 "clockid", "clockid to use for events, see clock_gettime()",
1090 OPT_STRING_OPTARG('S', "snapshot", &record.opts.auxtrace_snapshot_opts,
1091 "opts", "AUX area tracing Snapshot Mode", ""),
1092 OPT_UINTEGER(0, "proc-map-timeout", &record.opts.proc_map_timeout,
1093 "per thread proc mmap processing timeout in ms"),
1094 OPT_BOOLEAN(0, "switch-events", &record.opts.record_switch_events,
1095 "Record context switch events"),
1099 struct option *record_options = __record_options;
1101 int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
1104 struct record *rec = &record;
1105 char errbuf[BUFSIZ];
1107 rec->evlist = perf_evlist__new();
1108 if (rec->evlist == NULL)
1111 perf_config(perf_record_config, rec);
1113 argc = parse_options(argc, argv, record_options, record_usage,
1114 PARSE_OPT_STOP_AT_NON_OPTION);
1115 if (!argc && target__none(&rec->opts.target))
1116 usage_with_options(record_usage, record_options);
1118 if (nr_cgroups && !rec->opts.target.system_wide) {
1119 ui__error("cgroup monitoring only available in"
1120 " system-wide mode\n");
1121 usage_with_options(record_usage, record_options);
1123 if (rec->opts.record_switch_events &&
1124 !perf_can_record_switch_events()) {
1125 ui__error("kernel does not support recording context switch events (--switch-events option)\n");
1126 usage_with_options(record_usage, record_options);
1130 rec->itr = auxtrace_record__init(rec->evlist, &err);
1135 err = auxtrace_parse_snapshot_options(rec->itr, &rec->opts,
1136 rec->opts.auxtrace_snapshot_opts);
1144 if (symbol_conf.kptr_restrict)
1146 "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n"
1147 "check /proc/sys/kernel/kptr_restrict.\n\n"
1148 "Samples in kernel functions may not be resolved if a suitable vmlinux\n"
1149 "file is not found in the buildid cache or in the vmlinux path.\n\n"
1150 "Samples in kernel modules won't be resolved at all.\n\n"
1151 "If some relocation was applied (e.g. kexec) symbols may be misresolved\n"
1152 "even with a suitable vmlinux or kallsyms file.\n\n");
1154 if (rec->no_buildid_cache || rec->no_buildid)
1155 disable_buildid_cache();
1157 if (rec->evlist->nr_entries == 0 &&
1158 perf_evlist__add_default(rec->evlist) < 0) {
1159 pr_err("Not enough memory for event selector list\n");
1160 goto out_symbol_exit;
1163 if (rec->opts.target.tid && !rec->opts.no_inherit_set)
1164 rec->opts.no_inherit = true;
1166 err = target__validate(&rec->opts.target);
1168 target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
1169 ui__warning("%s", errbuf);
1172 err = target__parse_uid(&rec->opts.target);
1174 int saved_errno = errno;
1176 target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
1177 ui__error("%s", errbuf);
1180 goto out_symbol_exit;
1184 if (perf_evlist__create_maps(rec->evlist, &rec->opts.target) < 0)
1185 usage_with_options(record_usage, record_options);
1187 err = auxtrace_record__options(rec->itr, rec->evlist, &rec->opts);
1189 goto out_symbol_exit;
1191 if (record_opts__config(&rec->opts)) {
1193 goto out_symbol_exit;
1196 err = __cmd_record(&record, argc, argv);
1198 perf_evlist__delete(rec->evlist);
1200 auxtrace_record__free(rec->itr);
1204 static void snapshot_sig_handler(int sig __maybe_unused)
1206 if (!auxtrace_snapshot_enabled)
1208 auxtrace_snapshot_enabled = 0;
1209 auxtrace_snapshot_err = auxtrace_record__snapshot_start(record.itr);
1210 auxtrace_record__snapshot_started = 1;