From mboxrd@z Thu Jan  1 00:00:00 1970
From: Keir Fraser <keir@xen.org>
Subject: Re: common time reference between domU and dom0
Date: Fri, 10 Dec 2010 07:19:53 +0000
Message-ID: <C9278519.C560%keir@xen.org>
References: <AEC6C66638C05B468B556EA548C1A77D01BB896C@trantor>
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To: James Harper <james.harper@bendigoit.com.au>, xen-devel@lists.xensource.com
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System time, as exposed to guests by Xen, should be good enough.

 -- Keir


On 10/12/2010 05:23, "James Harper" <james.harper@bendigoit.com.au> wrote:

> I would like to be able to measure front/back ring message latency
> between a Windows DomU and Dom0. To do this I need a common time
> reference between the two, preferably with at least microsecond
> precision (latency <1us is irrelevant for my purposes). Does such a
> thing exist? A small amount of overhead in measuring this latency is
> acceptable.
> 
> Thanks
> 
> James
> 
> 
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