You were 100% correct Andrew. The problem was with how I configured XP,
though I seriously thought I knew better. I sysprepped my image and redid
it with the "multi-processor" hal and voila I now see and utilize both
cores. The odd part, however, is that the time required to complete a
processor intensive operation seems to remain almost the same. Instead of
using 50% of the available host CPU it now using 100% but estimates only a
tem minute savings in processing time. Whaaaaat?
I still feel like I'm missing something rather important, but at least
both CPUs are now available for use.
d
_____
From: Andrew Cathrow [mailto:acathrow@redhat.com]
Sent: Sunday, April 20, 2008 11:12 AM
To: David Levinger
Cc: fedora-xen(a)redhat.com
Subject: Re: [Fedora-xen] Unable to use multiple CPUs inside an HVM
When Windows installed selects the HAL library appropriate the the
hardware. If you install on a single CPU system then the uniprocessor HAL
is installed.
If you then add a second vcpu to the guest then the windows HAL won't see
it.
You'll need to replace Window's hal. See links below for some background.
I don't think there is a Microsoft *supported* way to do this but I've
done this a number of times without issue on XP and 2000, but I've not
tried this on 2003, 2008 or Vista
http://support.microsoft.com/kb/309283/en-us
http://support.microsoft.com/default.aspx?scid=kb;EN-US;237556
On Sat, 2008-04-19 at 10:40 -0700, David Levinger wrote:
Hey Guys,
I have a fully virtualized XP guest that is set to have 2 VCPUs and in the
guest I see 2 CPUs but when it is under heavy load it only utilizes 1 of
the physical cores.
Both xm and virsh show that the guest only has 1 CPU, but my config file
and the guest show it should have 2.
What am I missing? How can I get this guest to have access to both cores?
Thanks!
David
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