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Re: [Xen-devel] Xen 4 TSC problems

from [Jan Beulich] [Permanent Link][Original]
To: "Olivier Hanesse" <olivier.hanesse@xxxxxxxxx>
Subject: Re: [Xen-devel] Xen 4 TSC problems
From: "Jan Beulich" <JBeulich@xxxxxxxxxx>
Date: Thu, 24 Feb 2011 10:59:30 +0000
Cc: Dan Magenheimer <dan.magenheimer@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxx, Jeremy Fitzhardinge <jeremy@xxxxxxxx>, Keir Fraser <keir.xen@xxxxxxxxx>, Xen Users <xen-users@xxxxxxxxxxxxxxxxxxx>, Mark Adams <mark@xxxxxxxxxxxxxxxxxx>
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>>> On 24.02.11 at 10:59, Olivier Hanesse <olivier.hanesse@xxxxxxxxx> wrote:
> (XEN) Platform timer appears to have unexpectedly wrapped 10 or more times.
> 
> Output of xm debug-key s :
> 
> (XEN) TSC has constant rate, deep Cstates possible, so not reliable,
> warp=2684 (count=4)

Did you try turning of use of C states ("cpuidle=0" on the Xen
command line)?

Jan


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