linux-kernel - [PATCH 0/2] sched: Reduce contention on tg's load_avg & runnable

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Message-Id: <1379965163-18440-1-git-send-email-Waiman.Long@hp.com>
Date:	Mon, 23 Sep 2013 15:39:21 -0400
From:	Waiman Long <Waiman.Long@...com>
To:	Ingo Molnar <mingo@...hat.com>,
	Peter Zijlstra <peterz@...radead.org>
Cc:	Waiman Long <Waiman.Long@...com>, linux-kernel@...r.kernel.org,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	"Eric W. Biederman" <ebiederm@...ssion.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Serge Hallyn <serge.hallyn@...onical.com>,
	"Chandramouleeswaran, Aswin" <aswin@...com>,
	"Norton, Scott J" <scott.norton@...com>
Subject: [PATCH 0/2] sched: Reduce contention on tg's load_avg & runnable_avg

These 2 patches try to reduce contention on the load_avg and
runnable_avg values of the task_group structure in large NUMA
machine by:

patch 1: Move them into their own cacheline & reduce actual read/write
	 to them.

patch 2: Reduce the frequecy of doing the average computation.

Waiman Long (2):
  sched: reduce contention on tg's load_avg & runnable_avg
  sched, numa: reduce load/runnable_avg computation frequency

 init/Kconfig         |   13 ++++++++
 kernel/sched/core.c  |    1 +
 kernel/sched/fair.c  |   84 +++++++++++++++++++++++++++++++++++++++++++++-----
 kernel/sched/sched.h |   29 ++++++++++++++++-
 4 files changed, 117 insertions(+), 10 deletions(-)

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