Re: [Xen-devel] clock drift in Xen 4.0.0

[Keir Fraser <keir.fraser@xxxxxxxxxxxxx>]

On 25/05/2010 08:01, "James Harper" <james.harper@xxxxxxxxxxxxxxxx> wrote:

>> Are you running NTP? 100ppm drift isn't unbelievable without external
>> synchronisation.
>> 
> 
> That's 7 minutes in front of the Dom0 that it's sitting on. The Dom0
> runs ntp. Another DomU on the same system is ahead by a similar amount
> (9 minutes over 74 days). I thought that with independent_wallclock=0
> that they should stay in step.
> 
> I actually just noticed that I'm running 4.0.0-rc6, not 4.0.0 proper...
> d'oh. I think I should probably update before thinking about it much
> more.

It probably depends on your dom0 and domU kernels also. Have they both been
observed to behave 'properly' before? In particular I'm not sure pv_ops
behaves same as ealrier kernels.

 -- Keir




_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxxxxxxxx
http://lists.xensource.com/xen-devel