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Re: [Xen-devel] Xen & I/O in clusters - Single Vs. Dual CPU issue

To: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Subject: Re: [Xen-devel] Xen & I/O in clusters - Single Vs. Dual CPU issue
From: Rune Johan Andresen <runejoha@xxxxxxxxxxx>
Date: Fri, 5 Nov 2004 18:33:09 +0100
Cc: Xen Virtual Machine Monitor <xen-devel@xxxxxxxxxxxxxxxxxxxxx>, br260@xxxxxxxxx, Rune Johan Andresen <Rune.Johan.Andresen@xxxxxxxxxxx>, H=E5vard_Bjerke <havard.bjerke@xxxxxxxxxxx>
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Yes, I am running on a SMP system with two CPUs. The nodes are running on different CPUs, but is this a problem? If the two guest OSs are unprivileged and run on separate CPUs, they should perform I/O just as good (or bad) anyway, no?


On Nov 5, 2004, at 5:47 PM, Keir Fraser wrote:

A and B are domain 0, A1,A2,B1,B2 are the guest OS systems. I think all
are privileged (?), They are
created with the same config file, exception of the file loopback
configuration and ip config.


Are you running on SMP systems? I would guess the performance differs
based on whether DOM0 and the unprivileged guest are runnign on the
same CPU or different CPUs...

 -- Keir

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