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Date: Mon, 3 Feb 2003 20:09:20 +0100
From: Martin Hermanowski <martin@martin.mh57.de>
To: Valdis.Kletnieks@vt.edu
Cc: John Bradford <john@grabjohn.com>, Seamus <assembly@gofree.indigo.ie>,
       linux-kernel@vger.kernel.org
Subject: Re: CPU throttling??
Message-ID: <20030203190920.GO1472@martin.mh57.de>
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On Mon, Feb 03, 2003 at 01:57:17PM -0500, Valdis.Kletnieks@vt.edu wrote:
> On Mon, 03 Feb 2003 17:13:02 GMT, John Bradford said:
>=20
> > Incidently, Linux has always halted the processor, rather than spun in
> > an idle loop, which saves power.
>=20
> It's conceivable that a CPU halted at 1.2Gz takes less power than one
> at 1.6Gz - anybody have any actual data on this?  Alternately phrased,
> does CPU throttling save power over and above what the halt does?

If I slow down my 1GHz CPU to 732MHz, I get 15min more (195min total).
So it is not much, but noticeable.

Regards,
Martin

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