Re: [RFC][PATCH 2.6] PM Timer as primary timing source on i386

From: john stultz (
Date: Mon Jul 21 2003 - 12:35:18 EST

On Sat, 2003-07-19 at 01:14, Dominik Brodowski wrote:
> This patch implements support for a different timing source for the i386
> architecture, the Power Management Timer (PMTMR). It offers correct results
> with a ~3.6MHz resolution even during aggressive Powermanagement like ACPI
> C-State transitions, throttling and/or frequency scaling. It is based partly
> on Arjan's patch for 2.4.

Very cool! I had actually been working on a version of the same thing
bug got stalled on the duplicated ACPI parsing. I like your trick of
having it as a module to avoid the ACPI early boot parsing, but it could
cause problems with alternate time sources. Maybe later in the 2.6/2.7
time frame we can do some sort of delayed registering and time

I'll play around with it and let you know if I have any other feedback.

Very nice work!

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