From mboxrd@z Thu Jan  1 00:00:00 1970
From: Erik Rull <erik.rull@rdsoftware.de>
Subject: Re: XP smp using a lot of CPU
Date: Wed, 13 May 2009 22:23:51 +0200
Message-ID: <4A0B2C57.10900@rdsoftware.de>
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Hi all,

very very interesting.

I have a similar problem but the other way round.
If my XP runs up tp 100% CPU usage "top" on the linux host reports "only" 
33% cpu usage. I would expect around 50% because I only provide one core 
for the guest. I already increased the process priority of qemu and the io 
priority, nothing helped. The rest of the CPU is nearly idle, no excessive 
disk access this time :-)

Any Idea what this could be?

Best regards,

Erik


Ross Boylan wrote:
> I just installed XP into a new VM, specifying -smp 2 for the machine.
> According to top, it's using nearly 200% of a cpu even when I'm not
> doing anything.
> 
> Is this real CPU useage, or just a reporting problem (just as my disk
> image is big according to ls, but isn't really)?
> 
> If it's real, is there anything I can do about it?
> 
> kvm 0.7.2 on Debian Lenny (but 2.6.29 kernel), amd64.  Xeon chips; 32
> bit version of XP pro installed, now fully patched (including the
> Windows Genuine Advantage stuff, though I cancelled it when it wanted to
> run).  
> 
> Task manager in XP shows virtually no CPU useage.
> 
> Please cc me on responses.
> 
> Thanks for any assistance.