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Message-ID: <1345041897.31459.95.camel@twins>
Date: Wed, 15 Aug 2012 16:44:57 +0200
From: Peter Zijlstra <a.p.zijlstra@...llo.nl>
To: Arjan van de Ven <arjan@...ux.intel.com>
Cc: Alex Shi <alex.shi@...el.com>,
Suresh Siddha <suresh.b.siddha@...el.com>,
vincent.guittot@...aro.org, svaidy@...ux.vnet.ibm.com,
Ingo Molnar <mingo@...nel.org>,
Andrew Morton <akpm@...ux-foundation.org>,
Linus Torvalds <torvalds@...ux-foundation.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
Thomas Gleixner <tglx@...utronix.de>,
Paul Turner <pjt@...gle.com>
Subject: Re: [discussion]sched: a rough proposal to enable power saving in
scheduler
On Wed, 2012-08-15 at 07:19 -0700, Arjan van de Ven wrote:
> Ideally the scheduler builds up some history of the typical run
> duration of the task (with a bias to more recent runs).
> But... even then, the past is only a poor predictor for the future.
PJTs patches do this. But yes, a crystal-ball instruction which
completes in a single cycle would be most appreciated :-)
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