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Date: Wed, 10 Dec 2003 10:06:45 -0800 (PST)
From: Nate Lawson <nate@root.org>
To: Lukas Ertl <l.ertl@univie.ac.at>
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cc: acpi-jp@jp.freebsd.org
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Subject: Re: ACPI throttling changes
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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.

-Nate