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Re: [Xen-users] Time Synchronization

from [Urs Thuermann]

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Subject:	Re: [Xen-users] Time Synchronization
From:	Urs Thuermann <urs@xxxxxxxxxxxxxxxxx>
Date:	08 Apr 2006 22:58:36 +0200
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Jan Philipp Giel <mail@xxxxxxxxxxx> writes:

> Am Freitag, 7. April 2006 09:10 schrieb Stephan AustermÃ¼hle:
> > Do all the domU's get the
> > time from dom0 meaning it is sufficient to run an ntpd there or do I have
> > it to setup in every domU?
> 
> Yes.

How does that work?  I thought every domU has its own software system
clock updated by regular interrupts e.g. at 100Hz or 1000Hz.  This
would require running ntpd to synchronize the clock to some external
reference clock.  Or is the gettimeofday system call modified in domU
so that it communicates to dom0 to get the time, i.e. no more
interrupt driven software clock in the domU?

urs

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