From: tip-bot for Richard Kennedy <richard@rsk.demon.co.uk>
To: linux-tip-commits@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, hpa@zytor.com, mingo@redhat.com,
a.p.zijlstra@chello.nl, richard@rsk.demon.co.uk,
tglx@linutronix.de, mingo@elte.hu
Subject: [tip:perf/urgent] perf: Reorder & optimize perf_event_context to remove alignment padding on 64 bit builds
Date: Wed, 16 Mar 2011 13:59:17 GMT [thread overview]
Message-ID: <tip-ee643c4179c3a18b018de3a4c07a7bb3a75c8e4e@git.kernel.org> (raw)
In-Reply-To: <1299512819.2039.5.camel@castor.rsk>
Commit-ID: ee643c4179c3a18b018de3a4c07a7bb3a75c8e4e
Gitweb: http://git.kernel.org/tip/ee643c4179c3a18b018de3a4c07a7bb3a75c8e4e
Author: Richard Kennedy <richard@rsk.demon.co.uk>
AuthorDate: Mon, 7 Mar 2011 15:46:59 +0000
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Wed, 16 Mar 2011 14:04:14 +0100
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>
---
include/linux/perf_event.h | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 614615b..f495c01 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -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:
prev parent reply other threads:[~2011-03-16 13:59 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-03-07 15:46 [PATCH] trace: reorder perf_event_context to remove alignment padding on 64 bit builds Richard Kennedy
2011-03-16 13:59 ` tip-bot for Richard Kennedy [this message]
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