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DateSat, 17 Feb 2007 10:06:40 -0500
FromRik van Riel <>
SubjectRe: [Xen-devel] Re: [patch 14/21] Xen-paravirt: Add XEN config options and disableunsupported config options.
Dan Hecht wrote:

> Yes, and regardless of whether you run your periodic timer slower than
> HZ, calibrating time in a VM is always difficult due to the fact the
> kernel is time sharing the physical cpu. Why not just ask the
> underlying hypervisor?

Upstream Xen does just that.

I'm guessing we'll want something similar for KVM paravirt.

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