From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Jan Beulich" <JBeulich@novell.com>
Subject: Re: Xen 4 TSC problems
Date: Thu, 24 Feb 2011 10:59:30 +0000
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To: Olivier Hanesse <olivier.hanesse@gmail.com>
Cc: Dan Magenheimer <dan.magenheimer@oracle.com>, xen-devel@lists.xensource.com, Jeremy Fitzhardinge <jeremy@goop.org>, Keir Fraser <keir.xen@gmail.com>, Xen Users <xen-users@lists.xensource.com>, Mark Adams <mark@campbell-lange.net>
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>>> On 24.02.11 at 10:59, Olivier Hanesse <olivier.hanesse@gmail.com> =
wrote:
> (XEN) Platform timer appears to have unexpectedly wrapped 10 or more =
times.
>=20
> Output of xm debug-key s :
>=20
> (XEN) TSC has constant rate, deep Cstates possible, so not reliable,
> warp=3D2684 (count=3D4)

Did you try turning of use of C states ("cpuidle=3D0" on the Xen
command line)?

Jan