linux-kernel - Re: sched: deep power-saving states

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Message-ID: <20081022131218.14a1b686@infradead.org>
Date:	Wed, 22 Oct 2008 13:12:18 -0700
From:	Arjan van de Ven <arjan@...radead.org>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Gregory Haskins <ghaskins@...ell.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	Ingo Molnar <mingo@...e.hu>,
	LKML <linux-kernel@...r.kernel.org>,
	Jon Masters <jonathan@...masters.org>
Subject: Re: sched: deep power-saving states

On Wed, 22 Oct 2008 22:05:25 +0200
Peter Zijlstra <peterz@...radead.org> wrote:

> > 
> > in fact you already have this *exactly* today; this isn't future
> > technology.
> 
> Interesting, what knob do I turn to get idle=poll dynamically?

you ask PMQOS for a 0 usec latency, and you just get idle=poll behavior;
you can do this from the kernel, or, as root, from userland.


-- 
Arjan van de Ven 	Intel Open Source Technology Centre
For development, discussion and tips for power savings, 
visit http://www.lesswatts.org
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