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RE: [Xen-users] hvm performance

To: "Tony Hoyle" <tmh@xxxxxxxxxxxx>, xen-users@xxxxxxxxxxxxxxxxxxx
Subject: RE: [Xen-users] hvm performance
From: "Petersson, Mats" <Mats.Petersson@xxxxxxx>
Date: Tue, 29 May 2007 12:34:19 +0200
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Thread-topic: [Xen-users] hvm performance

> -----Original Message-----
> From: xen-users-bounces@xxxxxxxxxxxxxxxxxxx 
> [mailto:xen-users-bounces@xxxxxxxxxxxxxxxxxxx] On Behalf Of Tony Hoyle
> Sent: 28 May 2007 22:42
> To: xen-users@xxxxxxxxxxxxxxxxxxx
> Subject: [Xen-users] hvm performance
> Hi
> I've been running xen with linux guests for a while now and 
> thought I'd 
> try windows as I have a new server.  All seemed to go fine except 
> performance is *horrible* - I'm currently installing Win2003 SP2 and 
> it's been running over 12 hours (thank god for vnc) - each individual 
> file is taking between 3 and 4 seconds each.

I can install Vista in about 20-30 minutes. XP or 2K3 is roughly the
same amount of time - not much different from the native install. 

> Server is an intel E6600 with plenty of memory so should be 
> pretty fast.
> I had a look around and it is apparently the performance of qemu-dm 
> that's critical.  That's currently pinned at 1% CPU usage and using 
> 332MB of memory (pushing dom0 into swap as I only gave it 256MB) - is 
> this normal?  CPU load apart from that is:

Doesn't seem like the normal behaviour I see. I use 256MB in Dom0, but
installing Windows works just fine in this setup. 

What version of Xen are you using? What is the host?


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