Re: [Xen-devel] (XEN) Platform timer appears to have unexpectedly wrapped 10 or more times.

[Andreas Kinzler <ml-xen-devel@xxxxxx>]

I have the same problem. Do you use ntpd? Which version? I suspect some 
link between the problem and ntpd.
Andreas

On 05.01.2012 10:39, Philippe.Simonet@xxxxxxxxxxxx wrote:
> Hi
>
> I have the same problem with 4 machines (hp dl385, AMD), the problem appears 
> one time per machine and per month ...
> No chance to re-produce it faster. On some other machine with another AMD 
> processor, I never had this problem. Olivier Hanesse
> reported the problem on some Intel CPU and not on other processor.
>
> I'm using debian squeeze, with
>
> xen-hypervisor-4.0-amd64                4.0.1-4
> linux-image-2.6.32-5-xen-amd64          2.6.32-38 (dom0)
>
> that last changes that I have done is to add cpuidle=0 to hypervisor command 
> line. stable since 3-4 weeks (...)
>
> I have e test system that runs 20 paravirt. domus, with wheezy, with same 
> problematic HW, with
> xen-hypervisor-4.1-amd64                4.1.2-2
> linux-image-3.1.0-1-amd64               3.1.6-1 (dom0)
> and this system never had the TSC jump problem. but test system are test system 
> ....
>
> I would be happy if you could reproduce the problem faster a me, so testing new 
> xen / dom0 version could be
> easier ...
>
> thanks and regards
>
> Philippe
>
>
>
>
> > -----Original Message-----
> > From: xen-devel-bounces@xxxxxxxxxxxxxxxxxxx [mailto:xen-devel-
> > bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Josip Rodin
> > Sent: Wednesday, January 04, 2012 6:24 PM
> > To: xen-devel@xxxxxxxxxxxxxxxxxxx
> > Subject: [Xen-devel] (XEN) Platform timer appears to have unexpectedly
> > wrapped 10 or more times.
> >
> > Hi,
> >
> > Sometimes, seemingly randomly, long-running Xen domains, using
> > clocksource xen, have their clock shift by ~3000 or ~36000 seconds, often
> > with the dom0 complaining about clocksource tsc. The number changes if the
> > hypervisor is explicitly told to use clocksource=pit, but it still happens. It
> > doesn't seem to be particularly hardware-specific.
> >
> > See also http://bugs.debian.org/599161
> >
> > I see from the archives that others have reported this problem here in
> > February last year, but I couldn't find a resolution. Can anyone help?
> >
> > (Please Cc: responses, I'm not subscribed.)
> >
> > --
> >       2. That which causes joy or happiness.
> >
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