linux-kernel - Re: [PATCH 1/3]cpuidle take2: Core cpuidle infrastructure

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Message-ID: <20070228065932.GA23678@redhat.com>
Date:	Wed, 28 Feb 2007 01:59:32 -0500
From:	Dave Jones <davej@...hat.com>
To:	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>
Cc:	linux-kernel <linux-kernel@...r.kernel.org>,
	Andrew Morton <akpm@...l.org>, linux-acpi@...r.kernel.org,
	Adam Belay <abelay@...ell.com>,
	"Li, Shaohua" <shaohua.li@...el.com>,
	"Brown, Len" <len.brown@...el.com>
Subject: Re: [PATCH 1/3]cpuidle take2: Core cpuidle infrastructure

On Tue, Feb 27, 2007 at 08:47:55PM -0800, Pallipadi, Venkatesh wrote:

 > >I played with this a little, and got puzzled.
 > >My quad core box used exactly the same amount of power whether the
 > >'ladder' governer was loaded & in use or not.  In both situations
 > >it was exactly the same as a vanilla 2.6.20
 > >
 > >I'd have expected it to use more until I loaded up 'ladder' to bring it
 > >on par featurewise with 2.6.20.  What did I miss?
 > 
 > Quad core what platform?

Glenwood

 > How many C-states are supported in this platform?

Garg, only C1.  That explains a lot.

 > Current ladder is mostly like Policy embedded in ACPI today. But, Adam
 > has
 > been working on different policies that we want to experiment with as we
 > go along.

ok.

		Dave


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