From: "Matt Sealey" <matt@genesi-usa•com>
To: "'Jon Loeliger'" <jdl@jdl•com>
Cc: linuxppc-dev@ozlabs•org
Subject: RE: cpu power "management" for non-dfs chips with no pmu (for instance, 750cxe and mpc7447 in pegasos)
Date: Fri, 23 Jun 2006 08:58:56 -0500 [thread overview]
Message-ID: <01ca01c696cd$2e453f30$99dfdfdf@bakuhatsu.net> (raw)
In-Reply-To: <E1FtlnK-0007Zt-Tx@jdl.com>
I have nothing real to contribute other than I would like to see it :)
Before I asked I checked Google (as is expected of anyone these days)
and found some discussions on debian-powerpc from 2002 but nobody
really did anything and nothing really came of it. I know 4 years later
all we have is powernowd which pokes up cpufreq which only supports
DFS and certain kinds of Mac PMU.
ICTC is such a simple thing to support and you can slow down the CPU
pretty comprehensively (from halving to 255x in theory) with an on and
off flag. I am surprised nobody implemented a cpufreq governer even if
it is totally useless and gives no perceivable benefits..
--
Matt Sealey <matt@genesi-usa•com>
Manager, Genesi, Developer Relations
> -----Original Message-----
> From: Jon Loeliger [mailto:jdl@jdl•com]
> Sent: Friday, June 23, 2006 8:34 AM
> To: matt@genesi-usa•com
> Cc: linuxppc-dev@ozlabs•org
> Subject: Re: cpu power "management" for non-dfs chips with no
> pmu (for instance, 750cxe and mpc7447 in pegasos)
>
> So, like, the other day "Matt Sealey" mumbled:
> >
> > I am basically trying to evaluate if we can do ANYTHING to reduce
> > power consumption of systems which are idle, as I have noticed that
> > ...
> >
> > Comments? :)
>
> Hi Matt,
>
> There is an effort afoot to revitalize some of the Linux
> Power Management issues, erm, currently going on over on the
> linux-pm list these days. No immediate results (yet), but
> there is some concerted effort. It should include some
> PowerPC presence.
>
> Please feel free to contribute, of course. :-)
>
> jdl
>
next prev parent reply other threads:[~2006-06-23 13:59 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-23 10:43 cpu power "management" for non-dfs chips with no pmu (for instance, 750cxe and mpc7447 in pegasos) Matt Sealey
2006-06-23 13:33 ` Jon Loeliger
2006-06-23 13:58 ` Matt Sealey [this message]
2006-06-23 14:26 ` Jon Loeliger
2006-06-23 14:31 ` Matt Sealey
2006-06-23 14:38 ` Raquel Velasco and Bill Buck
2006-06-23 23:49 ` Guennadi Liakhovetski
2006-06-24 16:16 ` Jon Loeliger
2006-06-24 17:29 ` Guennadi Liakhovetski
2006-06-27 22:47 ` Benjamin Herrenschmidt
2006-06-27 22:43 ` Benjamin Herrenschmidt
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