From: Daniel Walker <dwalker@mvista.com>
To: Dave Johnson <djohnson+linux-kernel@sw.starentnetworks.com>
Cc: linux-kernel@vger.kernel.org
Subject: Re: [PATCH] i386: fix TSC clock source calibration error
Date: Thu, 18 Oct 2007 13:43:34 -0700 [thread overview]
Message-ID: <1192740214.17527.185.camel@imap.mvista.com> (raw)
In-Reply-To: <18196.53154.100115.92459@zeus.sw.starentnetworks.com>
On Tue, 2007-10-16 at 10:50 -0400, Dave Johnson wrote:
>
> range of tsc_khz # of boots % of boots
> ----------------- ---------- ----------
> < 1999750 0 0.000%
> 1999750 - 1999800 21 3.048%
> 1999800 - 1999850 166 24.128%
> 1999850 - 1999900 241 35.029%
> 1999900 - 1999950 211 30.669%
> 1999950 - 2000000 42 6.105%
> 2000000 - 2000000 0 0.000%
> 2000050 - 2000100 0 0.000%
> [...]
> 2000100 - 2015000 1 0.145% << BAD
> 2015000 - 2030000 6 0.872% << BAD
> 2030000 - 2045000 1 0.145% << BAD
> 2045000 < 0 0.000%
>
> The worst boot was 2032.577 Mhz, over 1.5% off!
Can you tell us what type of machine this was? I've seen complaints
where the SMI's can cause some other funny stuff with calibration , be
no one can every reproduce anything..
Daniel
next prev parent reply other threads:[~2007-10-18 20:46 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-10-16 14:50 Dave Johnson
2007-10-16 15:11 ` Chuck Ebbert
2007-10-18 8:57 ` Ingo Molnar
2007-10-19 17:16 ` [PATCH] i386: fix TSC clock source calibration error [part 2] Dave Johnson
2007-10-19 18:01 ` Hiroshi Shimamoto
2007-10-19 18:34 ` Dave Johnson
2007-10-22 11:42 ` Ingo Molnar
2007-10-18 20:43 ` Daniel Walker [this message]
2007-10-19 17:31 ` [PATCH] i386: fix TSC clock source calibration error Dave Johnson
2007-10-19 18:45 Charles R Harris
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