perf: Reorder & optimize perf_event_context to remove alignment padding on 64 bit...
authorRichard Kennedy <richard@rsk.demon.co.uk>
Mon, 7 Mar 2011 15:46:59 +0000 (15:46 +0000)
committerIngo Molnar <mingo@elte.hu>
Wed, 16 Mar 2011 13:04:14 +0000 (14:04 +0100)
Remove 8 bytes of alignment padding from perf_event_context on 64 bit
builds which shrinks its size to 192 bytes allowing it to fit into one
fewer cache lines and into a smaller slab.

Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1299512819.2039.5.camel@castor.rsk>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
include/linux/perf_event.h

index 614615b..f495c01 100644 (file)
@@ -878,8 +878,8 @@ enum perf_event_context_type {
  * Used as a container for task events and CPU events as well:
  */
 struct perf_event_context {
-       enum perf_event_context_type    type;
        struct pmu                      *pmu;
+       enum perf_event_context_type    type;
        /*
         * Protect the states of the events in the list,
         * nr_active, and the list: