[fedora-virt] Slow Jerky Guests

[Justin M. Forbes]

On Mon, 2010-12-20 at 14:03 +0100, Michael Kuerschner wrote:
> Hello list,
> 
> On Tue, Dec 14, 2010 at 8:25 PM, Daniel P. Berrange <berrange at redhat.com> wrote:
> > On Tue, Dec 14, 2010 at 05:10:56PM +0000, Frank Murphy wrote:
> >> Hi Since reinstalling my virt-host to F14.
> >> My guest VM's are jerky, like as thought the screen is being refreshed
> >> after every action.
> >
> > Likely need to try this pending update
> >
> > https://admin.fedoraproject.org/updates/gtk-vnc-0.4.2-4.fc14
> 
> I install the package via the normal update service and test my ubuntu
> 10.04 virtual host. But on my PC, AMD Phenom + 4GB RAM, it runs still
> really slow. 1 CPU core of my host computer runs on 100% and the
> graphic display are so slow, that a normal work is not possible.
> 
> I think, the kvm environment on Fedora 13 runs very fast, so that I
> think: "No more VMWare", but with the actual version is depressing
> slow.
> 
> Hope you have some ideas to speed up the kvm system.

Which kernel are you running? The latest kernel update has some patches
which might help out here.  Specifically some timer fixes from
https://bugzilla.redhat.com/show_bug.cgi?id=644973

Justin