linux-kernel - Re: AMD Quad Core clock problem?

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Message-ID: <m3lk3fj3gd.fsf@maximus.localdomain>
Date:	Tue, 15 Apr 2008 03:45:38 +0200
From:	Krzysztof Halasa <khc@...waw.pl>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	Lennart Sorensen <lsorense@...lub.uwaterloo.ca>,
	Marc Perkel <mperkel@...oo.com>,
	Chris Snook <csnook@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: AMD Quad Core clock problem?

"H. Peter Anvin" <hpa@...or.com> writes:

> It shouldn't really matter, since "below" produces a similar spectrum
> at a slightly lower frequency.

Sure for CPU/TSC and similar clocks but in case of well-known (not
calibrated) frequency it could be a problem. Not sure if there are
such cases.

I wonder if spread spectrum could affect calibration of (various)
timers - unlike NTP calibration is a short process.
-- 
Krzysztof Halasa
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