Re: performance trouble

[Brian Jackson <iggy@theiggy.com>]

On Monday, January 30, 2012 09:36:55 AM David Cure wrote:
> Le Mon, Jan 23, 2012 at 09:28:37AM +0100, David Cure ecrivait :
> > 	I use several kvm box, and no problem at all except for 1
> > 
> > application that have bad response time.
> > 
> > 	The VM runs Windows 2008R2 and the application is an
> > 
> > client-server app develop with progress software and talk to an Oracle
> > databasei (on another server) and we access this app with RDS/TSE.
> > 
> > 	The physical server runs Debian testing to have qemu-kvm 1.0 and
> > 
> > linux kernel 3.1 and libvirt 0.9.8. We use virtio for disk and network
> > and use the last driver for Windows (from RH).
> > 
> > 	We have 2 references servers : one physical and one running
> > 
> > Vmware.
> > 
> > 	Response time :
> > 	o physical = 7s
> > 	o VM under vmware = 8s
> > 	o VM under KVM = 12s (to complete with qemu-kvm 0.12.5 and
> > 
> > kernel 2.6.32 we have 22s ...).
> > 
> > 	I attach the libvirt xml of my vm.
> > 	
> > 	How can I see what's append ? Do you have idea to increase
> > 
> > performance ?
> 
> 	no one interesting to try to track this issue where kvm is so
> slow ?
> 
> 	David.


Without more info or some way to reproduce the problem, it would be pointless 
for one of the devs to spend much time on it.