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"
36 static int __on_exit_count
= 0;
37 typedef void (*on_exit_func_t
) (int, void *);
38 static on_exit_func_t __on_exit_funcs
[ATEXIT_MAX
];
39 static void *__on_exit_args
[ATEXIT_MAX
];
40 static int __exitcode
= 0;
41 static void __handle_on_exit_funcs(void);
42 static int on_exit(on_exit_func_t function
, void *arg
);
43 #define exit(x) (exit)(__exitcode = (x))
45 static int on_exit(on_exit_func_t function
, void *arg
)
47 if (__on_exit_count
== ATEXIT_MAX
)
49 else if (__on_exit_count
== 0)
50 atexit(__handle_on_exit_funcs
);
51 __on_exit_funcs
[__on_exit_count
] = function
;
52 __on_exit_args
[__on_exit_count
++] = arg
;
56 static void __handle_on_exit_funcs(void)
59 for (i
= 0; i
< __on_exit_count
; i
++)
60 __on_exit_funcs
[i
] (__exitcode
, __on_exit_args
[i
]);
65 struct perf_tool tool
;
66 struct perf_record_opts opts
;
68 const char *output_name
;
69 struct perf_evlist
*evlist
;
70 struct perf_session
*session
;
73 unsigned int page_size
;
76 bool no_buildid_cache
;
78 off_t post_processing_offset
;
81 static void advance_output(struct perf_record
*rec
, size_t size
)
83 rec
->bytes_written
+= size
;
86 static int write_output(struct perf_record
*rec
, void *buf
, size_t size
)
89 int ret
= write(rec
->output
, buf
, size
);
92 pr_err("failed to write\n");
99 rec
->bytes_written
+= ret
;
105 static int process_synthesized_event(struct perf_tool
*tool
,
106 union perf_event
*event
,
107 struct perf_sample
*sample __maybe_unused
,
108 struct machine
*machine __maybe_unused
)
110 struct perf_record
*rec
= container_of(tool
, struct perf_record
, tool
);
111 if (write_output(rec
, event
, event
->header
.size
) < 0)
117 static int perf_record__mmap_read(struct perf_record
*rec
,
118 struct perf_mmap
*md
)
120 unsigned int head
= perf_mmap__read_head(md
);
121 unsigned int old
= md
->prev
;
122 unsigned char *data
= md
->base
+ rec
->page_size
;
134 if ((old
& md
->mask
) + size
!= (head
& md
->mask
)) {
135 buf
= &data
[old
& md
->mask
];
136 size
= md
->mask
+ 1 - (old
& md
->mask
);
139 if (write_output(rec
, buf
, size
) < 0) {
145 buf
= &data
[old
& md
->mask
];
149 if (write_output(rec
, buf
, size
) < 0) {
155 perf_mmap__write_tail(md
, old
);
161 static volatile int done
= 0;
162 static volatile int signr
= -1;
163 static volatile int child_finished
= 0;
165 static void sig_handler(int sig
)
174 static void perf_record__sig_exit(int exit_status __maybe_unused
, void *arg
)
176 struct perf_record
*rec
= arg
;
179 if (rec
->evlist
->workload
.pid
> 0) {
181 kill(rec
->evlist
->workload
.pid
, SIGTERM
);
184 if (WIFSIGNALED(status
))
185 psignal(WTERMSIG(status
), rec
->progname
);
188 if (signr
== -1 || signr
== SIGUSR1
)
191 signal(signr
, SIG_DFL
);
194 static int perf_record__open(struct perf_record
*rec
)
197 struct perf_evsel
*pos
;
198 struct perf_evlist
*evlist
= rec
->evlist
;
199 struct perf_session
*session
= rec
->session
;
200 struct perf_record_opts
*opts
= &rec
->opts
;
203 perf_evlist__config(evlist
, opts
);
205 list_for_each_entry(pos
, &evlist
->entries
, node
) {
207 if (perf_evsel__open(pos
, evlist
->cpus
, evlist
->threads
) < 0) {
208 if (perf_evsel__fallback(pos
, errno
, msg
, sizeof(msg
))) {
210 ui__warning("%s\n", msg
);
215 perf_evsel__open_strerror(pos
, &opts
->target
,
216 errno
, msg
, sizeof(msg
));
217 ui__error("%s\n", msg
);
222 if (perf_evlist__apply_filters(evlist
)) {
223 error("failed to set filter with %d (%s)\n", errno
,
229 if (perf_evlist__mmap(evlist
, opts
->mmap_pages
, false) < 0) {
230 if (errno
== EPERM
) {
231 pr_err("Permission error mapping pages.\n"
232 "Consider increasing "
233 "/proc/sys/kernel/perf_event_mlock_kb,\n"
234 "or try again with a smaller value of -m/--mmap_pages.\n"
235 "(current value: %d)\n", opts
->mmap_pages
);
237 } else if (!is_power_of_2(opts
->mmap_pages
) &&
238 (opts
->mmap_pages
!= UINT_MAX
)) {
239 pr_err("--mmap_pages/-m value must be a power of two.");
242 pr_err("failed to mmap with %d (%s)\n", errno
, strerror(errno
));
248 session
->evlist
= evlist
;
249 perf_session__set_id_hdr_size(session
);
254 static int process_buildids(struct perf_record
*rec
)
256 u64 size
= lseek(rec
->output
, 0, SEEK_CUR
);
261 rec
->session
->fd
= rec
->output
;
262 return __perf_session__process_events(rec
->session
, rec
->post_processing_offset
,
263 size
- rec
->post_processing_offset
,
264 size
, &build_id__mark_dso_hit_ops
);
267 static void perf_record__exit(int status
, void *arg
)
269 struct perf_record
*rec
= arg
;
274 if (!rec
->opts
.pipe_output
) {
275 rec
->session
->header
.data_size
+= rec
->bytes_written
;
277 if (!rec
->no_buildid
)
278 process_buildids(rec
);
279 perf_session__write_header(rec
->session
, rec
->evlist
,
281 perf_session__delete(rec
->session
);
282 perf_evlist__delete(rec
->evlist
);
287 static void perf_event__synthesize_guest_os(struct machine
*machine
, void *data
)
290 struct perf_tool
*tool
= data
;
292 *As for guest kernel when processing subcommand record&report,
293 *we arrange module mmap prior to guest kernel mmap and trigger
294 *a preload dso because default guest module symbols are loaded
295 *from guest kallsyms instead of /lib/modules/XXX/XXX. This
296 *method is used to avoid symbol missing when the first addr is
297 *in module instead of in guest kernel.
299 err
= perf_event__synthesize_modules(tool
, process_synthesized_event
,
302 pr_err("Couldn't record guest kernel [%d]'s reference"
303 " relocation symbol.\n", machine
->pid
);
306 * We use _stext for guest kernel because guest kernel's /proc/kallsyms
307 * have no _text sometimes.
309 err
= perf_event__synthesize_kernel_mmap(tool
, process_synthesized_event
,
312 err
= perf_event__synthesize_kernel_mmap(tool
, process_synthesized_event
,
315 pr_err("Couldn't record guest kernel [%d]'s reference"
316 " relocation symbol.\n", machine
->pid
);
319 static struct perf_event_header finished_round_event
= {
320 .size
= sizeof(struct perf_event_header
),
321 .type
= PERF_RECORD_FINISHED_ROUND
,
324 static int perf_record__mmap_read_all(struct perf_record
*rec
)
329 for (i
= 0; i
< rec
->evlist
->nr_mmaps
; i
++) {
330 if (rec
->evlist
->mmap
[i
].base
) {
331 if (perf_record__mmap_read(rec
, &rec
->evlist
->mmap
[i
]) != 0) {
338 if (perf_header__has_feat(&rec
->session
->header
, HEADER_TRACING_DATA
))
339 rc
= write_output(rec
, &finished_round_event
,
340 sizeof(finished_round_event
));
346 static int __cmd_record(struct perf_record
*rec
, int argc
, const char **argv
)
350 int err
, output
, feat
;
351 unsigned long waking
= 0;
352 const bool forks
= argc
> 0;
353 struct machine
*machine
;
354 struct perf_tool
*tool
= &rec
->tool
;
355 struct perf_record_opts
*opts
= &rec
->opts
;
356 struct perf_evlist
*evsel_list
= rec
->evlist
;
357 const char *output_name
= rec
->output_name
;
358 struct perf_session
*session
;
359 bool disabled
= false;
361 rec
->progname
= argv
[0];
363 rec
->page_size
= sysconf(_SC_PAGE_SIZE
);
365 on_exit(perf_record__sig_exit
, rec
);
366 signal(SIGCHLD
, sig_handler
);
367 signal(SIGINT
, sig_handler
);
368 signal(SIGUSR1
, sig_handler
);
369 signal(SIGTERM
, sig_handler
);
372 if (!fstat(STDOUT_FILENO
, &st
) && S_ISFIFO(st
.st_mode
))
373 opts
->pipe_output
= true;
375 rec
->output_name
= output_name
= "perf.data";
378 if (!strcmp(output_name
, "-"))
379 opts
->pipe_output
= true;
380 else if (!stat(output_name
, &st
) && st
.st_size
) {
381 char oldname
[PATH_MAX
];
382 snprintf(oldname
, sizeof(oldname
), "%s.old",
385 rename(output_name
, oldname
);
389 flags
= O_CREAT
|O_RDWR
|O_TRUNC
;
391 if (opts
->pipe_output
)
392 output
= STDOUT_FILENO
;
394 output
= open(output_name
, flags
, S_IRUSR
| S_IWUSR
);
396 perror("failed to create output file");
400 rec
->output
= output
;
402 session
= perf_session__new(output_name
, O_WRONLY
,
404 if (session
== NULL
) {
405 pr_err("Not enough memory for reading perf file header\n");
409 rec
->session
= session
;
411 for (feat
= HEADER_FIRST_FEATURE
; feat
< HEADER_LAST_FEATURE
; feat
++)
412 perf_header__set_feat(&session
->header
, feat
);
415 perf_header__clear_feat(&session
->header
, HEADER_BUILD_ID
);
417 if (!have_tracepoints(&evsel_list
->entries
))
418 perf_header__clear_feat(&session
->header
, HEADER_TRACING_DATA
);
420 if (!rec
->opts
.branch_stack
)
421 perf_header__clear_feat(&session
->header
, HEADER_BRANCH_STACK
);
424 err
= perf_evlist__prepare_workload(evsel_list
, &opts
->target
,
425 argv
, opts
->pipe_output
,
428 pr_err("Couldn't run the workload!\n");
429 goto out_delete_session
;
433 if (perf_record__open(rec
) != 0) {
435 goto out_delete_session
;
438 if (!evsel_list
->nr_groups
)
439 perf_header__clear_feat(&session
->header
, HEADER_GROUP_DESC
);
442 * perf_session__delete(session) will be called at perf_record__exit()
444 on_exit(perf_record__exit
, rec
);
446 if (opts
->pipe_output
) {
447 err
= perf_header__write_pipe(output
);
449 goto out_delete_session
;
451 err
= perf_session__write_header(session
, evsel_list
,
454 goto out_delete_session
;
458 && !perf_header__has_feat(&session
->header
, HEADER_BUILD_ID
)) {
459 pr_err("Couldn't generate buildids. "
460 "Use --no-buildid to profile anyway.\n");
462 goto out_delete_session
;
465 rec
->post_processing_offset
= lseek(output
, 0, SEEK_CUR
);
467 machine
= &session
->machines
.host
;
469 if (opts
->pipe_output
) {
470 err
= perf_event__synthesize_attrs(tool
, session
,
471 process_synthesized_event
);
473 pr_err("Couldn't synthesize attrs.\n");
474 goto out_delete_session
;
477 if (have_tracepoints(&evsel_list
->entries
)) {
479 * FIXME err <= 0 here actually means that
480 * there were no tracepoints so its not really
481 * an error, just that we don't need to
482 * synthesize anything. We really have to
483 * return this more properly and also
484 * propagate errors that now are calling die()
486 err
= perf_event__synthesize_tracing_data(tool
, output
, evsel_list
,
487 process_synthesized_event
);
489 pr_err("Couldn't record tracing data.\n");
490 goto out_delete_session
;
492 advance_output(rec
, err
);
496 err
= perf_event__synthesize_kernel_mmap(tool
, process_synthesized_event
,
499 err
= perf_event__synthesize_kernel_mmap(tool
, process_synthesized_event
,
502 pr_err("Couldn't record kernel reference relocation symbol\n"
503 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
504 "Check /proc/kallsyms permission or run as root.\n");
506 err
= perf_event__synthesize_modules(tool
, process_synthesized_event
,
509 pr_err("Couldn't record kernel module information.\n"
510 "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
511 "Check /proc/modules permission or run as root.\n");
514 machines__process_guests(&session
->machines
,
515 perf_event__synthesize_guest_os
, tool
);
518 if (perf_target__has_task(&opts
->target
))
519 err
= perf_event__synthesize_thread_map(tool
, evsel_list
->threads
,
520 process_synthesized_event
,
522 else if (perf_target__has_cpu(&opts
->target
))
523 err
= perf_event__synthesize_threads(tool
, process_synthesized_event
,
525 else /* command specified */
529 goto out_delete_session
;
531 if (rec
->realtime_prio
) {
532 struct sched_param param
;
534 param
.sched_priority
= rec
->realtime_prio
;
535 if (sched_setscheduler(0, SCHED_FIFO
, ¶m
)) {
536 pr_err("Could not set realtime priority.\n");
538 goto out_delete_session
;
543 * When perf is starting the traced process, all the events
544 * (apart from group members) have enable_on_exec=1 set,
545 * so don't spoil it by prematurely enabling them.
547 if (!perf_target__none(&opts
->target
))
548 perf_evlist__enable(evsel_list
);
554 perf_evlist__start_workload(evsel_list
);
557 int hits
= rec
->samples
;
559 if (perf_record__mmap_read_all(rec
) < 0) {
561 goto out_delete_session
;
564 if (hits
== rec
->samples
) {
567 err
= poll(evsel_list
->pollfd
, evsel_list
->nr_fds
, -1);
572 * When perf is starting the traced process, at the end events
573 * die with the process and we wait for that. Thus no need to
574 * disable events in this case.
576 if (done
&& !disabled
&& !perf_target__none(&opts
->target
)) {
577 perf_evlist__disable(evsel_list
);
582 if (quiet
|| signr
== SIGUSR1
)
585 fprintf(stderr
, "[ perf record: Woken up %ld times to write data ]\n", waking
);
588 * Approximate RIP event size: 24 bytes.
591 "[ perf record: Captured and wrote %.3f MB %s (~%" PRIu64
" samples) ]\n",
592 (double)rec
->bytes_written
/ 1024.0 / 1024.0,
594 rec
->bytes_written
/ 24);
599 perf_session__delete(session
);
603 #define BRANCH_OPT(n, m) \
604 { .name = n, .mode = (m) }
606 #define BRANCH_END { .name = NULL }
613 static const struct branch_mode branch_modes
[] = {
614 BRANCH_OPT("u", PERF_SAMPLE_BRANCH_USER
),
615 BRANCH_OPT("k", PERF_SAMPLE_BRANCH_KERNEL
),
616 BRANCH_OPT("hv", PERF_SAMPLE_BRANCH_HV
),
617 BRANCH_OPT("any", PERF_SAMPLE_BRANCH_ANY
),
618 BRANCH_OPT("any_call", PERF_SAMPLE_BRANCH_ANY_CALL
),
619 BRANCH_OPT("any_ret", PERF_SAMPLE_BRANCH_ANY_RETURN
),
620 BRANCH_OPT("ind_call", PERF_SAMPLE_BRANCH_IND_CALL
),
625 parse_branch_stack(const struct option
*opt
, const char *str
, int unset
)
628 (PERF_SAMPLE_BRANCH_USER |\
629 PERF_SAMPLE_BRANCH_KERNEL |\
630 PERF_SAMPLE_BRANCH_HV)
632 uint64_t *mode
= (uint64_t *)opt
->value
;
633 const struct branch_mode
*br
;
634 char *s
, *os
= NULL
, *p
;
641 * cannot set it twice, -b + --branch-filter for instance
646 /* str may be NULL in case no arg is passed to -b */
648 /* because str is read-only */
649 s
= os
= strdup(str
);
658 for (br
= branch_modes
; br
->name
; br
++) {
659 if (!strcasecmp(s
, br
->name
))
663 ui__warning("unknown branch filter %s,"
664 " check man page\n", s
);
678 /* default to any branch */
679 if ((*mode
& ~ONLY_PLM
) == 0) {
680 *mode
= PERF_SAMPLE_BRANCH_ANY
;
687 #ifdef LIBUNWIND_SUPPORT
688 static int get_stack_size(char *str
, unsigned long *_size
)
692 unsigned long max_size
= round_down(USHRT_MAX
, sizeof(u64
));
694 size
= strtoul(str
, &endptr
, 0);
700 size
= round_up(size
, sizeof(u64
));
701 if (!size
|| size
> max_size
)
709 pr_err("callchain: Incorrect stack dump size (max %ld): %s\n",
713 #endif /* LIBUNWIND_SUPPORT */
715 int record_parse_callchain(const char *arg
, struct perf_record_opts
*opts
)
717 char *tok
, *name
, *saveptr
= NULL
;
721 /* We need buffer that we know we can write to. */
722 buf
= malloc(strlen(arg
) + 1);
728 tok
= strtok_r((char *)buf
, ",", &saveptr
);
729 name
= tok
? : (char *)buf
;
732 /* Framepointer style */
733 if (!strncmp(name
, "fp", sizeof("fp"))) {
734 if (!strtok_r(NULL
, ",", &saveptr
)) {
735 opts
->call_graph
= CALLCHAIN_FP
;
738 pr_err("callchain: No more arguments "
739 "needed for -g fp\n");
742 #ifdef LIBUNWIND_SUPPORT
744 } else if (!strncmp(name
, "dwarf", sizeof("dwarf"))) {
745 const unsigned long default_stack_dump_size
= 8192;
748 opts
->call_graph
= CALLCHAIN_DWARF
;
749 opts
->stack_dump_size
= default_stack_dump_size
;
751 tok
= strtok_r(NULL
, ",", &saveptr
);
753 unsigned long size
= 0;
755 ret
= get_stack_size(tok
, &size
);
756 opts
->stack_dump_size
= size
;
758 #endif /* LIBUNWIND_SUPPORT */
760 pr_err("callchain: Unknown --call-graph option "
771 static void callchain_debug(struct perf_record_opts
*opts
)
773 pr_debug("callchain: type %d\n", opts
->call_graph
);
775 if (opts
->call_graph
== CALLCHAIN_DWARF
)
776 pr_debug("callchain: stack dump size %d\n",
777 opts
->stack_dump_size
);
780 int record_parse_callchain_opt(const struct option
*opt
,
784 struct perf_record_opts
*opts
= opt
->value
;
787 /* --no-call-graph */
789 opts
->call_graph
= CALLCHAIN_NONE
;
790 pr_debug("callchain: disabled\n");
794 ret
= record_parse_callchain(arg
, opts
);
796 callchain_debug(opts
);
801 int record_callchain_opt(const struct option
*opt
,
802 const char *arg __maybe_unused
,
803 int unset __maybe_unused
)
805 struct perf_record_opts
*opts
= opt
->value
;
807 if (opts
->call_graph
== CALLCHAIN_NONE
)
808 opts
->call_graph
= CALLCHAIN_FP
;
810 callchain_debug(opts
);
814 static const char * const record_usage
[] = {
815 "perf record [<options>] [<command>]",
816 "perf record [<options>] -- <command> [<options>]",
821 * XXX Ideally would be local to cmd_record() and passed to a perf_record__new
822 * because we need to have access to it in perf_record__exit, that is called
823 * after cmd_record() exits, but since record_options need to be accessible to
824 * builtin-script, leave it here.
826 * At least we don't ouch it in all the other functions here directly.
828 * Just say no to tons of global variables, sigh.
830 static struct perf_record record
= {
832 .mmap_pages
= UINT_MAX
,
833 .user_freq
= UINT_MAX
,
834 .user_interval
= ULLONG_MAX
,
842 #define CALLCHAIN_HELP "setup and enables call-graph (stack chain/backtrace) recording: "
844 #ifdef LIBUNWIND_SUPPORT
845 const char record_callchain_help
[] = CALLCHAIN_HELP
"fp dwarf";
847 const char record_callchain_help
[] = CALLCHAIN_HELP
"fp";
851 * XXX Will stay a global variable till we fix builtin-script.c to stop messing
852 * with it and switch to use the library functions in perf_evlist that came
853 * from builtin-record.c, i.e. use perf_record_opts,
854 * perf_evlist__prepare_workload, etc instead of fork+exec'in 'perf record',
857 const struct option record_options
[] = {
858 OPT_CALLBACK('e', "event", &record
.evlist
, "event",
859 "event selector. use 'perf list' to list available events",
860 parse_events_option
),
861 OPT_CALLBACK(0, "filter", &record
.evlist
, "filter",
862 "event filter", parse_filter
),
863 OPT_STRING('p', "pid", &record
.opts
.target
.pid
, "pid",
864 "record events on existing process id"),
865 OPT_STRING('t', "tid", &record
.opts
.target
.tid
, "tid",
866 "record events on existing thread id"),
867 OPT_INTEGER('r', "realtime", &record
.realtime_prio
,
868 "collect data with this RT SCHED_FIFO priority"),
869 OPT_BOOLEAN('D', "no-delay", &record
.opts
.no_delay
,
870 "collect data without buffering"),
871 OPT_BOOLEAN('R', "raw-samples", &record
.opts
.raw_samples
,
872 "collect raw sample records from all opened counters"),
873 OPT_BOOLEAN('a', "all-cpus", &record
.opts
.target
.system_wide
,
874 "system-wide collection from all CPUs"),
875 OPT_STRING('C', "cpu", &record
.opts
.target
.cpu_list
, "cpu",
876 "list of cpus to monitor"),
877 OPT_U64('c', "count", &record
.opts
.user_interval
, "event period to sample"),
878 OPT_STRING('o', "output", &record
.output_name
, "file",
880 OPT_BOOLEAN('i', "no-inherit", &record
.opts
.no_inherit
,
881 "child tasks do not inherit counters"),
882 OPT_UINTEGER('F', "freq", &record
.opts
.user_freq
, "profile at this frequency"),
883 OPT_UINTEGER('m', "mmap-pages", &record
.opts
.mmap_pages
,
884 "number of mmap data pages"),
885 OPT_BOOLEAN(0, "group", &record
.opts
.group
,
886 "put the counters into a counter group"),
887 OPT_CALLBACK_NOOPT('g', NULL
, &record
.opts
,
888 NULL
, "enables call-graph recording" ,
889 &record_callchain_opt
),
890 OPT_CALLBACK(0, "call-graph", &record
.opts
,
891 "mode[,dump_size]", record_callchain_help
,
892 &record_parse_callchain_opt
),
893 OPT_INCR('v', "verbose", &verbose
,
894 "be more verbose (show counter open errors, etc)"),
895 OPT_BOOLEAN('q', "quiet", &quiet
, "don't print any message"),
896 OPT_BOOLEAN('s', "stat", &record
.opts
.inherit_stat
,
897 "per thread counts"),
898 OPT_BOOLEAN('d', "data", &record
.opts
.sample_address
,
900 OPT_BOOLEAN('T', "timestamp", &record
.opts
.sample_time
, "Sample timestamps"),
901 OPT_BOOLEAN('P', "period", &record
.opts
.period
, "Sample period"),
902 OPT_BOOLEAN('n', "no-samples", &record
.opts
.no_samples
,
904 OPT_BOOLEAN('N', "no-buildid-cache", &record
.no_buildid_cache
,
905 "do not update the buildid cache"),
906 OPT_BOOLEAN('B', "no-buildid", &record
.no_buildid
,
907 "do not collect buildids in perf.data"),
908 OPT_CALLBACK('G', "cgroup", &record
.evlist
, "name",
909 "monitor event in cgroup name only",
911 OPT_STRING('u', "uid", &record
.opts
.target
.uid_str
, "user",
914 OPT_CALLBACK_NOOPT('b', "branch-any", &record
.opts
.branch_stack
,
915 "branch any", "sample any taken branches",
918 OPT_CALLBACK('j', "branch-filter", &record
.opts
.branch_stack
,
919 "branch filter mask", "branch stack filter modes",
921 OPT_BOOLEAN('W', "weight", &record
.opts
.sample_weight
,
922 "sample by weight (on special events only)"),
926 int cmd_record(int argc
, const char **argv
, const char *prefix __maybe_unused
)
929 struct perf_evlist
*evsel_list
;
930 struct perf_record
*rec
= &record
;
933 evsel_list
= perf_evlist__new();
934 if (evsel_list
== NULL
)
937 rec
->evlist
= evsel_list
;
939 argc
= parse_options(argc
, argv
, record_options
, record_usage
,
940 PARSE_OPT_STOP_AT_NON_OPTION
);
941 if (!argc
&& perf_target__none(&rec
->opts
.target
))
942 usage_with_options(record_usage
, record_options
);
944 if (nr_cgroups
&& !rec
->opts
.target
.system_wide
) {
945 ui__error("cgroup monitoring only available in"
946 " system-wide mode\n");
947 usage_with_options(record_usage
, record_options
);
952 if (symbol_conf
.kptr_restrict
)
954 "WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n"
955 "check /proc/sys/kernel/kptr_restrict.\n\n"
956 "Samples in kernel functions may not be resolved if a suitable vmlinux\n"
957 "file is not found in the buildid cache or in the vmlinux path.\n\n"
958 "Samples in kernel modules won't be resolved at all.\n\n"
959 "If some relocation was applied (e.g. kexec) symbols may be misresolved\n"
960 "even with a suitable vmlinux or kallsyms file.\n\n");
962 if (rec
->no_buildid_cache
|| rec
->no_buildid
)
963 disable_buildid_cache();
965 if (evsel_list
->nr_entries
== 0 &&
966 perf_evlist__add_default(evsel_list
) < 0) {
967 pr_err("Not enough memory for event selector list\n");
968 goto out_symbol_exit
;
971 err
= perf_target__validate(&rec
->opts
.target
);
973 perf_target__strerror(&rec
->opts
.target
, err
, errbuf
, BUFSIZ
);
974 ui__warning("%s", errbuf
);
977 err
= perf_target__parse_uid(&rec
->opts
.target
);
979 int saved_errno
= errno
;
981 perf_target__strerror(&rec
->opts
.target
, err
, errbuf
, BUFSIZ
);
982 ui__error("%s", errbuf
);
985 goto out_symbol_exit
;
989 if (perf_evlist__create_maps(evsel_list
, &rec
->opts
.target
) < 0)
990 usage_with_options(record_usage
, record_options
);
992 if (rec
->opts
.user_interval
!= ULLONG_MAX
)
993 rec
->opts
.default_interval
= rec
->opts
.user_interval
;
994 if (rec
->opts
.user_freq
!= UINT_MAX
)
995 rec
->opts
.freq
= rec
->opts
.user_freq
;
998 * User specified count overrides default frequency.
1000 if (rec
->opts
.default_interval
)
1002 else if (rec
->opts
.freq
) {
1003 rec
->opts
.default_interval
= rec
->opts
.freq
;
1005 ui__error("frequency and count are zero, aborting\n");
1010 err
= __cmd_record(&record
, argc
, argv
);
1012 perf_evlist__munmap(evsel_list
);
1013 perf_evlist__close(evsel_list
);
1015 perf_evlist__delete_maps(evsel_list
);