From: "Siddha, Suresh B" <suresh.b.siddha@intel.com>
To: akpm@linux-foundation.org
Cc: mingo@elte.hu, nickpiggin@yahoo.com.au,
linux-kernel@vger.kernel.org, suresh.b.siddha@intel.com
Subject: [patch] sched: align rq to cacheline boundary
Date: Mon, 9 Apr 2007 11:08:53 -0700 [thread overview]
Message-ID: <20070409180853.GC3948@linux-os.sc.intel.com> (raw)
Align the per cpu runqueue to the cacheline boundary. This will minimize the
number of cachelines touched during remote wakeup.
Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com>
---
diff --git a/kernel/sched.c b/kernel/sched.c
index b9a6837..eca33c5 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -278,7 +278,7 @@ struct rq {
struct lock_class_key rq_lock_key;
};
-static DEFINE_PER_CPU(struct rq, runqueues);
+static DEFINE_PER_CPU(struct rq, runqueues) ____cacheline_aligned_in_smp;
static inline int cpu_of(struct rq *rq)
{
next reply other threads:[~2007-04-09 18:10 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-04-09 18:08 Siddha, Suresh B [this message]
2007-04-09 20:40 ` [patch] sched: align rq to cacheline boundary Andrew Morton
2007-04-09 21:53 ` Ravikiran G Thirumalai
2007-04-09 22:17 ` Siddha, Suresh B
2007-04-10 5:00 ` Ravikiran G Thirumalai
2007-04-10 6:36 ` Ingo Molnar
2007-04-10 23:47 ` Siddha, Suresh B
2007-04-10 7:37 ` Andi Kleen
2007-04-10 6:24 ` Ingo Molnar
2007-04-10 16:40 ` Siddha, Suresh B
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