perf_counter: PERF_RECORD_TIME

By popular request, provide means to log a timestamp along with the
counter overflow event.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090406094518.024173282@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 2 insertions, 0 deletions

diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index ca2d4df29e0c..928a7fae0961 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -102,6 +102,7 @@ enum perf_counter_record_format {
         PERF_RECORD_TID         = 1U << 1,
         PERF_RECORD_GROUP       = 1U << 2,
         PERF_RECORD_CALLCHAIN   = 1U << 3,
+        PERF_RECORD_TIME        = 1U << 4,
 };
 
 /*
@@ -221,6 +222,7 @@ enum perf_event_type {
         __PERF_EVENT_TID                = PERF_RECORD_TID,
         __PERF_EVENT_GROUP              = PERF_RECORD_GROUP,
         __PERF_EVENT_CALLCHAIN          = PERF_RECORD_CALLCHAIN,
+        __PERF_EVENT_TIME               = PERF_RECORD_TIME,
 };
 
 #ifdef __KERNEL__