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Date: Tue, 19 Feb 2002 09:30:53 +0000
From: Pavel Machek <pavel@suse.cz>
To: "H. Peter Anvin" <hpa@zytor.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: Missed jiffies
Message-ID: <20020219093052.B37@toy.ucw.cz>
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Hi!

> > lap tops), is the fact that TSC is NOT clocked at a fixed rate.  It is
> > affected by throttling (reduced in 12.5% increments) and by power
> > management.
> 
> If the TSC is affected by HLT, throttling, or C2 power management, the
> TSC is broken (as it is on Cyrix chips, for example.)  The TSC usually
> *is* affected by C3 power management, but the OS should be aware of
> C3.

Add thinkpad 560X (pentium/MMX) and toshiba 4030cdt (celeron) to your
blacklist, then. I believe that by your definition *many* sstems are
broken.
								Pavel
-- 
Philips Velo 1: 1"x4"x8", 300gram, 60, 12MB, 40bogomips, linux, mutt,
details at http://atrey.karlin.mff.cuni.cz/~pavel/velo/index.html.

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