From a1f84a3ab8e002159498814eaa7e48c33752b04b Mon Sep 17 00:00:00 2001
From: Mike Galbraith <efault@gmx.de>
Date: Tue, 27 Oct 2009 15:35:38 +0100
Subject: [PATCH] sched: Check for an idle shared cache in
 select_task_rq_fair()

When waking affine, check for an idle shared cache, and if
found, wake to that CPU/sibling instead of the waker's CPU.

This improves pgsql+oltp ramp up by roughly 8%. Possibly more
for other loads, depending on overlap. The trade-off is a
roughly 1% peak downturn if tasks are truly synchronous.

Signed-off-by: Mike Galbraith <efault@gmx.de>
Cc: Arjan van de Ven <arjan@infradead.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: <stable@kernel.org>
LKML-Reference: <1256654138.17752.7.camel@marge.simson.net>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
Reading git-format-patch failed