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/header.h"
18 #include "util/event.h"
19 #include "util/evlist.h"
20 #include "util/evsel.h"
21 #include "util/debug.h"
22 #include "util/session.h"
23 #include "util/tool.h"
24 #include "util/symbol.h"
25 #include "util/cpumap.h"
26 #include "util/thread_map.h"
27 #include "util/data.h"
33 #ifndef HAVE_ON_EXIT_SUPPORT
37 static int __on_exit_count = 0;
38 typedef void (*on_exit_func_t) (int, void *);
39 static on_exit_func_t __on_exit_funcs[ATEXIT_MAX];
40 static void *__on_exit_args[ATEXIT_MAX];
41 static int __exitcode = 0;
42 static void __handle_on_exit_funcs(void);
43 static int on_exit(on_exit_func_t function, void *arg);
44 #define exit(x) (exit)(__exitcode = (x))
46 static int on_exit(on_exit_func_t function, void *arg)
48 if (__on_exit_count == ATEXIT_MAX)
50 else if (__on_exit_count == 0)
51 atexit(__handle_on_exit_funcs);
52 __on_exit_funcs[__on_exit_count] = function;
53 __on_exit_args[__on_exit_count++] = arg;
57 static void __handle_on_exit_funcs(void)
60 for (i = 0; i < __on_exit_count; i++)
61 __on_exit_funcs[i] (__exitcode, __on_exit_args[i]);
66 struct perf_tool tool;
67 struct perf_record_opts opts;
69 struct perf_data_file file;
70 struct perf_evlist *evlist;
71 struct perf_session *session;
75 bool no_buildid_cache;
77 off_t post_processing_offset;
80 static void advance_output(struct perf_record *rec, size_t size)
82 rec->bytes_written += size;
85 static int write_output(struct perf_record *rec, void *buf, size_t size)
87 struct perf_data_file *file = &rec->file;
90 int ret = write(file->fd, buf, size);
93 pr_err("failed to write perf data, error: %m\n");
100 rec->bytes_written += ret;
106 static int process_synthesized_event(struct perf_tool *tool,
107 union perf_event *event,
108 struct perf_sample *sample __maybe_unused,
109 struct machine *machine __maybe_unused)
111 struct perf_record *rec = container_of(tool, struct perf_record, tool);
112 if (write_output(rec, event, event->header.size) < 0)
118 static int perf_record__mmap_read(struct perf_record *rec,
119 struct perf_mmap *md)
121 unsigned int head = perf_mmap__read_head(md);
122 unsigned int old = md->prev;
123 unsigned char *data = md->base + page_size;
135 if ((old & md->mask) + size != (head & md->mask)) {
136 buf = &data[old & md->mask];
137 size = md->mask + 1 - (old & md->mask);
140 if (write_output(rec, buf, size) < 0) {
146 buf = &data[old & md->mask];
150 if (write_output(rec, buf, size) < 0) {
156 perf_mmap__write_tail(md, old);
162 static volatile int done = 0;
163 static volatile int signr = -1;
164 static volatile int child_finished = 0;
166 static void sig_handler(int sig)
175 static void perf_record__sig_exit(int exit_status __maybe_unused, void *arg)
177 struct perf_record *rec = arg;
180 if (rec->evlist->workload.pid > 0) {
182 kill(rec->evlist->workload.pid, SIGTERM);
185 if (WIFSIGNALED(status))
186 psignal(WTERMSIG(status), rec->progname);
189 if (signr == -1 || signr == SIGUSR1)
192 signal(signr, SIG_DFL);
195 static int perf_record__open(struct perf_record *rec)
198 struct perf_evsel *pos;
199 struct perf_evlist *evlist = rec->evlist;
200 struct perf_session *session = rec->session;
201 struct perf_record_opts *opts = &rec->opts;
204 perf_evlist__config(evlist, opts);
206 list_for_each_entry(pos, &evlist->entries, node) {
208 if (perf_evsel__open(pos, evlist->cpus, evlist->threads) < 0) {
209 if (perf_evsel__fallback(pos, errno, msg, sizeof(msg))) {
211 ui__warning("%s\n", msg);
216 perf_evsel__open_strerror(pos, &opts->target,
217 errno, msg, sizeof(msg));
218 ui__error("%s\n", msg);
223 if (perf_evlist__apply_filters(evlist)) {
224 error("failed to set filter with %d (%s)\n", errno,
230 if (perf_evlist__mmap(evlist, opts->mmap_pages, false) < 0) {
231 if (errno == EPERM) {
232 pr_err("Permission error mapping pages.\n"
233 "Consider increasing "
234 "/proc/sys/kernel/perf_event_mlock_kb,\n"
235 "or try again with a smaller value of -m/--mmap_pages.\n"
236 "(current value: %d)\n", opts->mmap_pages);
239 pr_err("failed to mmap with %d (%s)\n", errno, strerror(errno));
245 session->evlist = evlist;
246 perf_session__set_id_hdr_size(session);
251 static int process_buildids(struct perf_record *rec)
253 struct perf_data_file *file = &rec->file;
254 struct perf_session *session = rec->session;
256 u64 size = lseek(file->fd, 0, SEEK_CUR);
260 return __perf_session__process_events(session, rec->post_processing_offset,
261 size - rec->post_processing_offset,
262 size, &build_id__mark_dso_hit_ops);
265 static void perf_record__exit(int status, void *arg)
267 struct perf_record *rec = arg;
268 struct perf_data_file *file = &rec->file;
273 if (!file->is_pipe) {
274 rec->session->header.data_size += rec->bytes_written;
276 if (!rec->no_buildid)
277 process_buildids(rec);
278 perf_session__write_header(rec->session, rec->evlist,
280 perf_session__delete(rec->session);
281 perf_evlist__delete(rec->evlist);
286 static void perf_event__synthesize_guest_os(struct machine *machine, void *data)
289 struct perf_tool *tool = data;
291 *As for guest kernel when processing subcommand record&report,
292 *we arrange module mmap prior to guest kernel mmap and trigger
293 *a preload dso because default guest module symbols are loaded
294 *from guest kallsyms instead of /lib/modules/XXX/XXX. This
295 *method is used to avoid symbol missing when the first addr is
296 *in module instead of in guest kernel.
298 err = perf_event__synthesize_modules(tool, process_synthesized_event,
301 pr_err("Couldn't record guest kernel [%d]'s reference"
302 " relocation symbol.\n", machine->pid);
305 * We use _stext for guest kernel because guest kernel's /proc/kallsyms
306 * have no _text sometimes.
308 err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
311 err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
314 pr_err("Couldn't record guest kernel [%d]'s reference"
315 " relocation symbol.\n", machine->pid);
318 static struct perf_event_header finished_round_event = {
319 .size = sizeof(struct perf_event_header),
320 .type = PERF_RECORD_FINISHED_ROUND,
323 static int perf_record__mmap_read_all(struct perf_record *rec)
328 for (i = 0; i < rec->evlist->nr_mmaps; i++) {
329 if (rec->evlist->mmap[i].base) {
330 if (perf_record__mmap_read(rec, &rec->evlist->mmap[i]) != 0) {
337 if (perf_header__has_feat(&rec->session->header, HEADER_TRACING_DATA))
338 rc = write_output(rec, &finished_round_event,
339 sizeof(finished_round_event));
345 static int __cmd_record(struct perf_record *rec, int argc, const char **argv)
348 unsigned long waking = 0;
349 const bool forks = argc > 0;
350 struct machine *machine;
351 struct perf_tool *tool = &rec->tool;
352 struct perf_record_opts *opts = &rec->opts;
353 struct perf_evlist *evsel_list = rec->evlist;
354 struct perf_data_file *file = &rec->file;
355 struct perf_session *session;
356 bool disabled = false;
358 rec->progname = argv[0];
360 on_exit(perf_record__sig_exit, rec);
361 signal(SIGCHLD, sig_handler);
362 signal(SIGINT, sig_handler);
363 signal(SIGUSR1, sig_handler);
364 signal(SIGTERM, sig_handler);
366 session = perf_session__new(file, false, NULL);
367 if (session == NULL) {
368 pr_err("Not enough memory for reading perf file header\n");
372 rec->session = session;
374 for (feat = HEADER_FIRST_FEATURE; feat < HEADER_LAST_FEATURE; feat++)
375 perf_header__set_feat(&session->header, feat);
378 perf_header__clear_feat(&session->header, HEADER_BUILD_ID);
380 if (!have_tracepoints(&evsel_list->entries))
381 perf_header__clear_feat(&session->header, HEADER_TRACING_DATA);
383 if (!rec->opts.branch_stack)
384 perf_header__clear_feat(&session->header, HEADER_BRANCH_STACK);
387 err = perf_evlist__prepare_workload(evsel_list, &opts->target,
391 pr_err("Couldn't run the workload!\n");
392 goto out_delete_session;
396 if (perf_record__open(rec) != 0) {
398 goto out_delete_session;
401 if (!evsel_list->nr_groups)
402 perf_header__clear_feat(&session->header, HEADER_GROUP_DESC);
405 * perf_session__delete(session) will be called at perf_record__exit()
407 on_exit(perf_record__exit, rec);
410 err = perf_header__write_pipe(file->fd);
412 goto out_delete_session;
414 err = perf_session__write_header(session, evsel_list,
417 goto out_delete_session;
421 && !perf_header__has_feat(&session->header, HEADER_BUILD_ID)) {
422 pr_err("Couldn't generate buildids. "
423 "Use --no-buildid to profile anyway.\n");
425 goto out_delete_session;
428 rec->post_processing_offset = lseek(file->fd, 0, SEEK_CUR);
430 machine = &session->machines.host;
433 err = perf_event__synthesize_attrs(tool, session,
434 process_synthesized_event);
436 pr_err("Couldn't synthesize attrs.\n");
437 goto out_delete_session;
440 if (have_tracepoints(&evsel_list->entries)) {
442 * FIXME err <= 0 here actually means that
443 * there were no tracepoints so its not really
444 * an error, just that we don't need to
445 * synthesize anything. We really have to
446 * return this more properly and also
447 * propagate errors that now are calling die()
449 err = perf_event__synthesize_tracing_data(tool, file->fd, evsel_list,
450 process_synthesized_event);
452 pr_err("Couldn't record tracing data.\n");
453 goto out_delete_session;
455 advance_output(rec, err);
459 err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
462 err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
465 pr_err("Couldn't record kernel reference relocation symbol\n"
466 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
467 "Check /proc/kallsyms permission or run as root.\n");
469 err = perf_event__synthesize_modules(tool, process_synthesized_event,
472 pr_err("Couldn't record kernel module information.\n"
473 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
474 "Check /proc/modules permission or run as root.\n");
477 machines__process_guests(&session->machines,
478 perf_event__synthesize_guest_os, tool);
481 if (perf_target__has_task(&opts->target))
482 err = perf_event__synthesize_thread_map(tool, evsel_list->threads,
483 process_synthesized_event,
485 else if (perf_target__has_cpu(&opts->target))
486 err = perf_event__synthesize_threads(tool, process_synthesized_event,
488 else /* command specified */
492 goto out_delete_session;
494 if (rec->realtime_prio) {
495 struct sched_param param;
497 param.sched_priority = rec->realtime_prio;
498 if (sched_setscheduler(0, SCHED_FIFO, ¶m)) {
499 pr_err("Could not set realtime priority.\n");
501 goto out_delete_session;
506 * When perf is starting the traced process, all the events
507 * (apart from group members) have enable_on_exec=1 set,
508 * so don't spoil it by prematurely enabling them.
510 if (!perf_target__none(&opts->target))
511 perf_evlist__enable(evsel_list);
517 perf_evlist__start_workload(evsel_list);
520 int hits = rec->samples;
522 if (perf_record__mmap_read_all(rec) < 0) {
524 goto out_delete_session;
527 if (hits == rec->samples) {
530 err = poll(evsel_list->pollfd, evsel_list->nr_fds, -1);
535 * When perf is starting the traced process, at the end events
536 * die with the process and we wait for that. Thus no need to
537 * disable events in this case.
539 if (done && !disabled && !perf_target__none(&opts->target)) {
540 perf_evlist__disable(evsel_list);
545 if (quiet || signr == SIGUSR1)
548 fprintf(stderr, "[ perf record: Woken up %ld times to write data ]\n", waking);
551 * Approximate RIP event size: 24 bytes.
554 "[ perf record: Captured and wrote %.3f MB %s (~%" PRIu64 " samples) ]\n",
555 (double)rec->bytes_written / 1024.0 / 1024.0,
557 rec->bytes_written / 24);
562 perf_session__delete(session);
566 #define BRANCH_OPT(n, m) \
567 { .name = n, .mode = (m) }
569 #define BRANCH_END { .name = NULL }
576 static const struct branch_mode branch_modes[] = {
577 BRANCH_OPT("u", PERF_SAMPLE_BRANCH_USER),
578 BRANCH_OPT("k", PERF_SAMPLE_BRANCH_KERNEL),
579 BRANCH_OPT("hv", PERF_SAMPLE_BRANCH_HV),
580 BRANCH_OPT("any", PERF_SAMPLE_BRANCH_ANY),
581 BRANCH_OPT("any_call", PERF_SAMPLE_BRANCH_ANY_CALL),
582 BRANCH_OPT("any_ret", PERF_SAMPLE_BRANCH_ANY_RETURN),
583 BRANCH_OPT("ind_call", PERF_SAMPLE_BRANCH_IND_CALL),
584 BRANCH_OPT("abort_tx", PERF_SAMPLE_BRANCH_ABORT_TX),
585 BRANCH_OPT("in_tx", PERF_SAMPLE_BRANCH_IN_TX),
586 BRANCH_OPT("no_tx", PERF_SAMPLE_BRANCH_NO_TX),
591 parse_branch_stack(const struct option *opt, const char *str, int unset)
594 (PERF_SAMPLE_BRANCH_USER |\
595 PERF_SAMPLE_BRANCH_KERNEL |\
596 PERF_SAMPLE_BRANCH_HV)
598 uint64_t *mode = (uint64_t *)opt->value;
599 const struct branch_mode *br;
600 char *s, *os = NULL, *p;
607 * cannot set it twice, -b + --branch-filter for instance
612 /* str may be NULL in case no arg is passed to -b */
614 /* because str is read-only */
615 s = os = strdup(str);
624 for (br = branch_modes; br->name; br++) {
625 if (!strcasecmp(s, br->name))
629 ui__warning("unknown branch filter %s,"
630 " check man page\n", s);
644 /* default to any branch */
645 if ((*mode & ~ONLY_PLM) == 0) {
646 *mode = PERF_SAMPLE_BRANCH_ANY;
653 #ifdef HAVE_LIBUNWIND_SUPPORT
654 static int get_stack_size(char *str, unsigned long *_size)
658 unsigned long max_size = round_down(USHRT_MAX, sizeof(u64));
660 size = strtoul(str, &endptr, 0);
666 size = round_up(size, sizeof(u64));
667 if (!size || size > max_size)
675 pr_err("callchain: Incorrect stack dump size (max %ld): %s\n",
679 #endif /* HAVE_LIBUNWIND_SUPPORT */
681 int record_parse_callchain_opt(const struct option *opt,
682 const char *arg, int unset)
684 struct perf_record_opts *opts = opt->value;
685 char *tok, *name, *saveptr = NULL;
689 /* --no-call-graph */
693 /* We specified default option if none is provided. */
696 /* We need buffer that we know we can write to. */
697 buf = malloc(strlen(arg) + 1);
703 tok = strtok_r((char *)buf, ",", &saveptr);
704 name = tok ? : (char *)buf;
707 /* Framepointer style */
708 if (!strncmp(name, "fp", sizeof("fp"))) {
709 if (!strtok_r(NULL, ",", &saveptr)) {
710 opts->call_graph = CALLCHAIN_FP;
713 pr_err("callchain: No more arguments "
714 "needed for -g fp\n");
717 #ifdef HAVE_LIBUNWIND_SUPPORT
719 } else if (!strncmp(name, "dwarf", sizeof("dwarf"))) {
720 const unsigned long default_stack_dump_size = 8192;
723 opts->call_graph = CALLCHAIN_DWARF;
724 opts->stack_dump_size = default_stack_dump_size;
726 tok = strtok_r(NULL, ",", &saveptr);
728 unsigned long size = 0;
730 ret = get_stack_size(tok, &size);
731 opts->stack_dump_size = size;
735 pr_debug("callchain: stack dump size %d\n",
736 opts->stack_dump_size);
737 #endif /* HAVE_LIBUNWIND_SUPPORT */
739 pr_err("callchain: Unknown -g option "
749 pr_debug("callchain: type %d\n", opts->call_graph);
754 static const char * const record_usage[] = {
755 "perf record [<options>] [<command>]",
756 "perf record [<options>] -- <command> [<options>]",
761 * XXX Ideally would be local to cmd_record() and passed to a perf_record__new
762 * because we need to have access to it in perf_record__exit, that is called
763 * after cmd_record() exits, but since record_options need to be accessible to
764 * builtin-script, leave it here.
766 * At least we don't ouch it in all the other functions here directly.
768 * Just say no to tons of global variables, sigh.
770 static struct perf_record record = {
772 .mmap_pages = UINT_MAX,
773 .user_freq = UINT_MAX,
774 .user_interval = ULLONG_MAX,
782 #define CALLCHAIN_HELP "do call-graph (stack chain/backtrace) recording: "
784 #ifdef HAVE_LIBUNWIND_SUPPORT
785 const char record_callchain_help[] = CALLCHAIN_HELP "[fp] dwarf";
787 const char record_callchain_help[] = CALLCHAIN_HELP "[fp]";
791 * XXX Will stay a global variable till we fix builtin-script.c to stop messing
792 * with it and switch to use the library functions in perf_evlist that came
793 * from builtin-record.c, i.e. use perf_record_opts,
794 * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record',
797 const struct option record_options[] = {
798 OPT_CALLBACK('e', "event", &record.evlist, "event",
799 "event selector. use 'perf list' to list available events",
800 parse_events_option),
801 OPT_CALLBACK(0, "filter", &record.evlist, "filter",
802 "event filter", parse_filter),
803 OPT_STRING('p', "pid", &record.opts.target.pid, "pid",
804 "record events on existing process id"),
805 OPT_STRING('t', "tid", &record.opts.target.tid, "tid",
806 "record events on existing thread id"),
807 OPT_INTEGER('r', "realtime", &record.realtime_prio,
808 "collect data with this RT SCHED_FIFO priority"),
809 OPT_BOOLEAN('D', "no-delay", &record.opts.no_delay,
810 "collect data without buffering"),
811 OPT_BOOLEAN('R', "raw-samples", &record.opts.raw_samples,
812 "collect raw sample records from all opened counters"),
813 OPT_BOOLEAN('a', "all-cpus", &record.opts.target.system_wide,
814 "system-wide collection from all CPUs"),
815 OPT_STRING('C', "cpu", &record.opts.target.cpu_list, "cpu",
816 "list of cpus to monitor"),
817 OPT_U64('c', "count", &record.opts.user_interval, "event period to sample"),
818 OPT_STRING('o', "output", &record.file.path, "file",
820 OPT_BOOLEAN('i', "no-inherit", &record.opts.no_inherit,
821 "child tasks do not inherit counters"),
822 OPT_UINTEGER('F', "freq", &record.opts.user_freq, "profile at this frequency"),
823 OPT_CALLBACK('m', "mmap-pages", &record.opts.mmap_pages, "pages",
824 "number of mmap data pages",
825 perf_evlist__parse_mmap_pages),
826 OPT_BOOLEAN(0, "group", &record.opts.group,
827 "put the counters into a counter group"),
828 OPT_CALLBACK_DEFAULT('g', "call-graph", &record.opts,
829 "mode[,dump_size]", record_callchain_help,
830 &record_parse_callchain_opt, "fp"),
831 OPT_INCR('v', "verbose", &verbose,
832 "be more verbose (show counter open errors, etc)"),
833 OPT_BOOLEAN('q', "quiet", &quiet, "don't print any message"),
834 OPT_BOOLEAN('s', "stat", &record.opts.inherit_stat,
835 "per thread counts"),
836 OPT_BOOLEAN('d', "data", &record.opts.sample_address,
838 OPT_BOOLEAN('T', "timestamp", &record.opts.sample_time, "Sample timestamps"),
839 OPT_BOOLEAN('P', "period", &record.opts.period, "Sample period"),
840 OPT_BOOLEAN('n', "no-samples", &record.opts.no_samples,
842 OPT_BOOLEAN('N', "no-buildid-cache", &record.no_buildid_cache,
843 "do not update the buildid cache"),
844 OPT_BOOLEAN('B', "no-buildid", &record.no_buildid,
845 "do not collect buildids in perf.data"),
846 OPT_CALLBACK('G', "cgroup", &record.evlist, "name",
847 "monitor event in cgroup name only",
849 OPT_STRING('u', "uid", &record.opts.target.uid_str, "user",
852 OPT_CALLBACK_NOOPT('b', "branch-any", &record.opts.branch_stack,
853 "branch any", "sample any taken branches",
856 OPT_CALLBACK('j', "branch-filter", &record.opts.branch_stack,
857 "branch filter mask", "branch stack filter modes",
859 OPT_BOOLEAN('W', "weight", &record.opts.sample_weight,
860 "sample by weight (on special events only)"),
861 OPT_BOOLEAN(0, "transaction", &record.opts.sample_transaction,
862 "sample transaction flags (special events only)"),
866 int cmd_record(int argc, const char **argv, const char *prefix __maybe_unused)
869 struct perf_evlist *evsel_list;
870 struct perf_record *rec = &record;
873 evsel_list = perf_evlist__new();
874 if (evsel_list == NULL)
877 rec->evlist = evsel_list;
879 argc = parse_options(argc, argv, record_options, record_usage,
880 PARSE_OPT_STOP_AT_NON_OPTION);
881 if (!argc && perf_target__none(&rec->opts.target))
882 usage_with_options(record_usage, record_options);
884 if (nr_cgroups && !rec->opts.target.system_wide) {
885 ui__error("cgroup monitoring only available in"
886 " system-wide mode\n");
887 usage_with_options(record_usage, record_options);
892 if (symbol_conf.kptr_restrict)
894 "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n"
895 "check /proc/sys/kernel/kptr_restrict.\n\n"
896 "Samples in kernel functions may not be resolved if a suitable vmlinux\n"
897 "file is not found in the buildid cache or in the vmlinux path.\n\n"
898 "Samples in kernel modules won't be resolved at all.\n\n"
899 "If some relocation was applied (e.g. kexec) symbols may be misresolved\n"
900 "even with a suitable vmlinux or kallsyms file.\n\n");
902 if (rec->no_buildid_cache || rec->no_buildid)
903 disable_buildid_cache();
905 if (evsel_list->nr_entries == 0 &&
906 perf_evlist__add_default(evsel_list) < 0) {
907 pr_err("Not enough memory for event selector list\n");
908 goto out_symbol_exit;
911 err = perf_target__validate(&rec->opts.target);
913 perf_target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
914 ui__warning("%s", errbuf);
917 err = perf_target__parse_uid(&rec->opts.target);
919 int saved_errno = errno;
921 perf_target__strerror(&rec->opts.target, err, errbuf, BUFSIZ);
922 ui__error("%s", errbuf);
925 goto out_symbol_exit;
929 if (perf_evlist__create_maps(evsel_list, &rec->opts.target) < 0)
930 usage_with_options(record_usage, record_options);
932 if (rec->opts.user_interval != ULLONG_MAX)
933 rec->opts.default_interval = rec->opts.user_interval;
934 if (rec->opts.user_freq != UINT_MAX)
935 rec->opts.freq = rec->opts.user_freq;
938 * User specified count overrides default frequency.
940 if (rec->opts.default_interval)
942 else if (rec->opts.freq) {
943 rec->opts.default_interval = rec->opts.freq;
945 ui__error("frequency and count are zero, aborting\n");
950 err = __cmd_record(&record, argc, argv);
952 perf_evlist__munmap(evsel_list);
953 perf_evlist__close(evsel_list);
955 perf_evlist__delete_maps(evsel_list);