linux-kernel - Re: [discussion]sched: a rough proposal to enable power saving in scheduler

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Date:	Wed, 15 Aug 2012 16:39:08 +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 06:45 -0700, Arjan van de Ven wrote:
> On 8/15/2012 4:05 AM, Peter Zijlstra wrote:
> > Yay, ideally we'd also provide a 3rd option: auto, which simply switches
> > between the two based on AC/BAT, UPS 
> 
> nooooooo!
> 
> anything but this.
> if anyone thinks that AC/Battery matters for power sensitivity... they
> need to go talk to a datacenter operator ;-)

Servers in a datacenter have battery?

> seriously, there are possibly many ways to have a power/performance
> preference..,. but AC/battery is a very very poor one.
> 
Do expand..
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