Re: [Xen-users] Xen timekeeping best practices

[Remi Gacogne <rgacogne-xen@xxxxxxxxxxxx>]

Hi,

> I think you should run ntp on DomU anyway.
> Found this info from
> http://wiki.debian.org/Xen#A.27clocksource.2BAC8-0.3ATimewentbackwards.27
>
> xen.independent_wallclock sysctl setting is not available for newer
> squeeze kernels supporting pvops. If you have relied on it, you would
> have to run ntpd in dom0 and domUs. source
>
> If you do can you please post your results?
I am already running NTP in dom0 AND domUs.

We are currently thinking that our problem may be related to the fact that 
the ACPI of the related hardware does not advertise HPET support, and we 
are investigating whether booting the kernel with hpet=force and cpuidle 
would fix this issue.



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