Commit 44d742e0 authored by David Ahern's avatar David Ahern Committed by Arnaldo Carvalho de Melo
Browse files

perf list: Add usage 



Currently 'perf list' is not very helpful if you forget the syntax:

  $ perf list -h

  List of pre-defined events (to be used in -e):

After:
  $ perf list -h

   usage: perf list [hw|sw|cache|tracepoint|pmu|event_glob]

Signed-off-by: default avatarDavid Ahern <dsahern@gmail.com>
Acked-by: default avatarIngo Molnar <mingo@kernel.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Jiri Olsa <jolsa@redhat.com>
Cc: Namhyung Kim <namhyung@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Stephane Eranian <eranian@google.com>
Link: http://lkml.kernel.org/r/527133AD.4030003@gmail.com


Signed-off-by: default avatarArnaldo Carvalho de Melo <acme@redhat.com>
parent 8e00ddc9

tools/perf/builtin-list.c

+14 −3
Original line number Diff line number Diff line
@@ -14,20 +14,31 @@ 
#include "util/parse-events.h"

#include "util/cache.h"

#include "util/pmu.h"

#include "util/parse-options.h"



int cmd_list(int argc, const char **argv, const char *prefix __maybe_unused)

{

	int i;

	const struct option list_options[] = {

		OPT_END()

	};

	const char * const list_usage[] = {

		"perf list [hw|sw|cache|tracepoint|pmu|event_glob]",

		NULL

	};



	argc = parse_options(argc, argv, list_options, list_usage,

			     PARSE_OPT_STOP_AT_NON_OPTION);



	setup_pager();



	if (argc == 1) {

	if (argc == 0) {

		print_events(NULL, false);

		return 0;

	}



	for (i = 1; i < argc; ++i) {

		if (i > 2)

	for (i = 0; i < argc; ++i) {

		if (i)

			putchar('\n');

		if (strncmp(argv[i], "tracepoint", 10) == 0)

			print_tracepoint_events(NULL, NULL, false);

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