linux-kernel - Re: TSC calibration sometimes not correct with RT patch.

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Message-ID: <e9f486400707250439k432d8b6dwb9c3066d7152f0dd@mail.gmail.com>
Date:	Wed, 25 Jul 2007 13:39:07 +0200
From:	"Henri Hunnekens" <henrihunnekens@...il.com>
To:	"Joachim Deguara" <joachim.deguara@....com>
Cc:	"Ingo Molnar" <mingo@...e.hu>,
	linux-kernel <linux-kernel@...r.kernel.org>,
	"Thomas Gleixner" <tglx@...utronix.de>
Subject: Re: TSC calibration sometimes not correct with RT patch.

That was also my first idea, however the local_irq_disable() routine
disables the interrupts according to Ingo, so an SMI is not possible.


2007/7/25, Joachim Deguara <joachim.deguara@....com>:
> On Wednesday 25 July 2007 09:56:38 Henri Hunnekens wrote:
> > Some more information, the problems occurs on a SMP machine. I've
> > added the system logging which displays the CPU speed. The last line
> > shows an inaccurate processor speed! I'll try an update, but I expect
> > this has something to do with the TSC calibration and that hasn't
> > changed, If I'm correct.
>
> Could it just be that an SMI happened during the calibration?
>
> -Joachim
>
>
>
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