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RE: [Xen-users] Win2k8 X64 R2 HVM - Timer_mode and HPET?

To: Pasi Kärkkäinen <pasik@xxxxxx>
Subject: RE: [Xen-users] Win2k8 X64 R2 HVM - Timer_mode and HPET?
From: "Robert Dunkley" <Robert@xxxxxxxxx>
Date: Mon, 24 May 2010 08:42:35 +0100
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Thread-topic: [Xen-users] Win2k8 X64 R2 HVM - Timer_mode and HPET?
Hi Pasi,


Looks like there is indeed no Viridian support in 3.3.0. Do you think 
timer_mode=2 might help? Is HPET a good idea for Server 2008 R2 X64?


Thanks,

Rob

-----Original Message-----
From: Pasi Kärkkäinen [mailto:pasik@xxxxxx] 
Sent: 24 May 2010 08:29
To: Robert Dunkley
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: Re: [Xen-users] Win2k8 X64 R2 HVM - Timer_mode and HPET?

On Mon, May 24, 2010 at 08:18:14AM +0100, Robert Dunkley wrote:
> Hi Pasi,
> 
> 
> I do not have Viridian set at all, I'm on Xen V3.3.0 so I'm not even sure if 
> it is supported by that version (?).
> 

Xen 3.3.0 is probably too old to run Win2008 R2 x64 HVM guest.

-- Pasi

> 
> Thanks,
> 
> Rob
> 
> -----Original Message-----
> From: Pasi Kärkkäinen [mailto:pasik@xxxxxx] 
> Sent: 22 May 2010 12:31
> To: Robert Dunkley
> Cc: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: Re: [Xen-users] Win2k8 X64 R2 HVM - Timer_mode and HPET?
> 
> On Fri, May 21, 2010 at 12:11:12PM +0100, Robert Dunkley wrote:
> > I currently have HPET=1 and timer_mode is not set. The system has 2
> > VCPUs each pinned to a physical core, both pinned CPUs are on the same
> > NUMA node. The dmesg log on the Dom0 has long since overflowed but I
> > seem to remember the Dom0 detects an HPET clock too.
> > 
> > I'm getting some Exchange errors to do with performance of the DB giving
> > ridiculous times, I'm also getting domain time synch errors. Seems like
> > the problem is a timing issue but what are the correct setting for a
> > Windows 2008 R2 X64 HVM?
> > 
> 
> Do you have viridian=1 ? 
> 
> -- Pasi
> 
> 
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