Commit ee643c41 authored Mar 07, 2011 by Richard Kennedy Committed by Ingo Molnar Mar 16, 2011

perf: Reorder & optimize perf_event_context to remove alignment padding on 64 bit builds



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>

parent a0f7d0f7

include/linux/perf_event.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -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: