[Xen-users] hvm performance

[Tony Hoyle <tmh@xxxxxxxxxxxx>]

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.
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:
dom0 8.7%
linux domu 0.3%
windows domu 5.6%

Load average of dom0 is 1.03.. but I can't for the life of me see why as 
the cpu is nearly idle.
So the CPU has buckets of spare capacity and xen isn't using it.  I 
expect I've configured something very wrong.  Any ideas?
Tony

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