Bug#396117: ITP: cpufreq-detect -- detect CPU frequency control driver
- To: Anthony DeRobertis <anthony@derobert.net>
- Cc: debian-devel@lists.debian.org, Per Olofsson <pelle@debian.org>, Chris Hanson <cph@csail.mit.edu>, 396117@bugs.debian.org
- Subject: Bug#396117: ITP: cpufreq-detect -- detect CPU frequency control driver
- From: Peter Palfrader <peter@palfrader.org>
- Date: Wed, 1 Nov 2006 13:26:20 +0100
- Message-id: <[🔎] 20061101122620.GT6867@asteria.noreply.org>
- Mail-followup-to: Peter Palfrader <peter@palfrader.org>, Anthony DeRobertis <anthony@derobert.net>, debian-devel@lists.debian.org, Per Olofsson <pelle@debian.org>, Chris Hanson <cph@csail.mit.edu>, 396117@bugs.debian.org
- Reply-to: Peter Palfrader <peter@palfrader.org>, 396117@bugs.debian.org
- In-reply-to: <[🔎] 454821CA.9090902@derobert.net>
- References: <20061029214432.GA16843@tiger> <45453BDF.6080307@debian.org> <20061030100415.GA3450@wonderland.linux.it> <20061030104505.GI3440@tiger> <454618BC.30503@csail.mit.edu> <20061030160938.GS3440@tiger> <20061030200332.GK6867@asteria.noreply.org> <[🔎] 454821CA.9090902@derobert.net>
On Tue, 31 Oct 2006, Anthony DeRobertis wrote:
> Peter Palfrader wrote:
> > How come it never outputs p4_clockmod? I use that happily on several
> > different machines.
> >
>
> I can confirm I've tried it on a machine. The performance impact was
> substantial (at least if I allowed it to go to its lowest speed); the
> power consumption difference was immeasurable[0].
>
> Have you actually measured the power savings?
With 2.8GHz IPMI claims the machine is using 88+96 Watts (two
powersupplies), when I let ondemand take down the CPUs to 700MHz it's
usually 76+88 Watts. Not a huge difference but it adds up.
--
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