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Date: Thu, 11 Dec 2003 19:10:49 +0100
To: Nate Lawson <nate@root.org>
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From: Ducrot Bruno <ducrot@poupinou.org>
cc: acpi-jp@jp.freebsd.org
cc: current@freebsd.org
cc: Lukas Ertl <l.ertl@univie.ac.at>
Subject: Re: ACPI throttling changes
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On Wed, Dec 10, 2003 at 10:06:45AM -0800, Nate Lawson wrote:
> On Wed, 10 Dec 2003, Lukas Ertl wrote:
> > On Tue, 9 Dec 2003, Nate Lawson wrote:
> > > I'm working on a shared CPU frequency control driver.  One step is to
> > > remove some of the autonomy of the throttling portion of acpi_cpu.
> > > Please test this patch if you have a machine which supports throttling.
> >
> > Apropos CPU frequency: is there a way to find out at what frequency the
> > CPU is running?  And shouldn't SpeedStep have an influence on that?  (Or
> > is SpeedStep not supported?)
> 
> This is getting a bit off-topic.  It's too early to discuss how all the
> different parts of cpufreq work.  The answer is "yes and no", depending on
> which underlying technologies your laptop has available.  ACPI throttling:
> yes, SpeedStep: mostly yes, ACPI performance states: no.

ACPI performance states (IO only though) should be ok, no?

-- 
Ducrot Bruno

--  Which is worse:  ignorance or apathy?
--  Don't know.  Don't care.