perf tools: Add some comments to the event definitions

Just to make it clear that these are _not_ generic event
structures but do rely on the counter configuration.

Signed-off-by: Peter Zijlstra <[email protected]>
Cc: Corey J Ashford <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: stephane eranian <[email protected]>
LKML-Reference: <20090813103655.334194326@chello.nl>
Signed-off-by: Ingo Molnar <[email protected]>

diff --git a/tools/perf/util/event.h b/tools/perf/util/event.h
index d26dc887ce52c5a65c1345906d62ffdaa7260103..fa7c50b654e144ae4cc44c407891b798937f43a2 100644 (file)
--- a/tools/perf/util/event.h
+++ b/tools/perf/util/event.h
@@ -4,6 +4,9 @@
 #include "util.h"
 #include <linux/list.h>
 
+/*
+ * PERF_SAMPLE_IP | PERF_SAMPLE_TID | *
+ */
 struct ip_event {
        struct perf_event_header header;
        u64 ip;
@@ -38,6 +41,9 @@ struct lost_event {
        u64 lost;
 };
 
+/*
+ * PERF_FORMAT_ENABLED | PERF_FORMAT_RUNNING | PERF_FORMAT_ID
+ */
 struct read_event {
        struct perf_event_header header;
        u32 pid,tid;