perf_counter tools: Add 'perf list' to list available events

perf list: List all the available event types which can be used in
-e (--event) options.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 3 insertions, 6 deletions

diff --git a/Documentation/perf_counter/builtin-stat.c b/Documentation/perf_counter/builtin-stat.c
index 9711e5524233..2cbf5a189589 100644
--- a/Documentation/perf_counter/builtin-stat.c
+++ b/Documentation/perf_counter/builtin-stat.c
@@ -293,18 +293,17 @@ static const char * const stat_usage[] = {
         NULL
 };
 
-static char events_help_msg[EVENTS_HELP_MAX];
-
 static const struct option options[] = {
         OPT_CALLBACK('e', "event", NULL, "event",
-                     events_help_msg, parse_events),
+                     "event selector. use 'perf list' to list available events",
+                     parse_events),
         OPT_BOOLEAN('i', "inherit", &inherit,
                     "child tasks inherit counters"),
         OPT_INTEGER('p', "pid", &target_pid,
                     "stat events on existing pid"),
         OPT_BOOLEAN('a', "all-cpus", &system_wide,
                             "system-wide collection from all CPUs"),
-        OPT_BOOLEAN('l', "scale", &scale,
+        OPT_BOOLEAN('S', "scale", &scale,
                             "scale/normalize counters"),
         OPT_END()
 };
@@ -313,8 +312,6 @@ int cmd_stat(int argc, const char **argv, const char *prefix)
 {
         page_size = sysconf(_SC_PAGE_SIZE);
 
-        create_events_help(events_help_msg);
-
         memcpy(attrs, default_attrs, sizeof(attrs));
 
         argc = parse_options(argc, argv, options, stat_usage, 0);