The following reply was made to PR port-amd64/34550; it has been noted by GNATS.

From: Pavel Cahyna <pavel@NetBSD.org>
To: gnats-bugs@NetBSD.org
Cc: 
Subject: Re: port-amd64/34550: system clock is drifting when amd64 Cool'n'Quiet is used
Date: Mon, 18 Sep 2006 11:21:12 +0200

 On Mon, Sep 18, 2006 at 07:45:02AM +0000, Martin Husemann wrote:
 > The following reply was made to PR port-amd64/34550; it has been noted by GNATS.
 > 
 > From: Martin Husemann <martin@duskware.de>
 > To: gnats-bugs@NetBSD.org
 > Cc: 
 > Subject: Re: port-amd64/34550: system clock is drifting when amd64 Cool'n'Quiet is used
 > Date: Mon, 18 Sep 2006 09:41:31 +0200
 > 
 >  You need to select a different timecounter source if you change CPU
 >  frequency (via sysctl).
 
 the kernel should do it automatically IMO.
 
 the "TSC and Power Management Events on AMD Processors" document could be
 helpful:
 
 http://lkml.org/lkml/2005/11/4/173
 
 Pavel