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Commit 43adec95 authored by Arnaldo Carvalho de Melo's avatar Arnaldo Carvalho de Melo
Browse files

perf evlist: New command to list the names of events present in a perf.data file 



[root@emilia ~]# perf record -a -e sched:* -e timer:timer* sleep 5
[ perf record: Woken up 1 times to write data ]
[ perf record: Captured and wrote 0.172 MB perf.data (~7530 samples) ]
[root@emilia ~]# perf evlist
sched:sched_kthread_stop
sched:sched_kthread_stop_ret
sched:sched_wakeup
sched:sched_wakeup_new
sched:sched_switch
sched:sched_migrate_task
sched:sched_process_free
sched:sched_process_exit
sched:sched_wait_task
sched:sched_process_wait
sched:sched_process_fork
sched:sched_stat_wait
sched:sched_stat_sleep
sched:sched_stat_iowait
sched:sched_stat_runtime
sched:sched_pi_setprio
timer:timer_init
timer:timer_start
timer:timer_expire_entry
timer:timer_expire_exit
timer:timer_cancel
[root@emilia ~]#

Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Mike Galbraith <efault@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Cc: Tom Zanussi <tzanussi@gmail.com>
LKML-Reference: <new-submission>
Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 1424dc96

tools/perf/Documentation/perf-evlist.txt

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perf-evlist(1)

==============



NAME

----

perf-evlist - List the event names in a perf.data file



SYNOPSIS

--------

[verse]

'perf evlist <options>'



DESCRIPTION

-----------

This command displays the names of events sampled in a perf.data file.



OPTIONS

-------

-i::

--input=::

        Input file name. (default: perf.data)



SEE ALSO

--------

linkperf:perf-record[1], linkperf:perf-list[1],

linkperf:perf-report[1]

tools/perf/Makefile

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@@ -338,6 +338,7 @@ endif 
BUILTIN_OBJS += $(OUTPUT)bench/mem-memcpy.o



BUILTIN_OBJS += $(OUTPUT)builtin-diff.o

BUILTIN_OBJS += $(OUTPUT)builtin-evlist.o

BUILTIN_OBJS += $(OUTPUT)builtin-help.o

BUILTIN_OBJS += $(OUTPUT)builtin-sched.o

BUILTIN_OBJS += $(OUTPUT)builtin-buildid-list.o

tools/perf/builtin-evlist.c

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/*

 * Builtin evlist command: Show the list of event selectors present

 * in a perf.data file.

 */

#include "builtin.h"



#include "util/util.h"



#include <linux/list.h>



#include "perf.h"

#include "util/evlist.h"

#include "util/evsel.h"

#include "util/parse-events.h"

#include "util/parse-options.h"

#include "util/session.h"



static char const *input_name = "perf.data";



static int __cmd_evlist(void)

{

	struct perf_session *session;

	struct perf_evsel *pos;



	session = perf_session__new(input_name, O_RDONLY, 0, false, NULL);

	if (session == NULL)

		return -ENOMEM;



	list_for_each_entry(pos, &session->evlist->entries, node)

		printf("%s\n", event_name(pos));



	perf_session__delete(session);

	return 0;

}



static const char * const evlist_usage[] = {

	"perf evlist [<options>]",

	NULL

};



static const struct option options[] = {

	OPT_STRING('i', "input", &input_name, "file",

		    "input file name"),

	OPT_END()

};



int cmd_evlist(int argc, const char **argv, const char *prefix __used)

{

	argc = parse_options(argc, argv, options, evlist_usage, 0);

	if (argc)

		usage_with_options(evlist_usage, options);



	return __cmd_evlist();

}

tools/perf/builtin.h

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@@ -19,6 +19,7 @@ extern int cmd_bench(int argc, const char **argv, const char *prefix); 
extern int cmd_buildid_cache(int argc, const char **argv, const char *prefix);

extern int cmd_buildid_list(int argc, const char **argv, const char *prefix);

extern int cmd_diff(int argc, const char **argv, const char *prefix);

extern int cmd_evlist(int argc, const char **argv, const char *prefix);

extern int cmd_help(int argc, const char **argv, const char *prefix);

extern int cmd_sched(int argc, const char **argv, const char *prefix);

extern int cmd_list(int argc, const char **argv, const char *prefix);

tools/perf/command-list.txt

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@@ -8,6 +8,7 @@ perf-bench mainporcelain common 
perf-buildid-cache		mainporcelain common

perf-buildid-list		mainporcelain common

perf-diff			mainporcelain common

perf-evlist			mainporcelain common

perf-inject			mainporcelain common

perf-list			mainporcelain common

perf-sched			mainporcelain common