[Spice-devel] Very poor performance on KVM with Ubuntu 12.10 guest

David Jaša djasa at redhat.com
Fri Nov 16 03:00:33 PST 2012

In addition to what Christophe writes, you can try to disable surfaces
in the guest driver:

# cat /etc/X11/xorg.conf.d/qxl.conf 
Section "Device"
         Identifier  "qxl"
         Driver      "qxl"
         #Option  "DPI"   "96 x 96"
         #Option "ENABLE_IMAGE_CACHE" "True"
         #Option "ENABLE_FALLBACK_CACHE" "False"
         Option "ENABLE_SURFACES" "False"

they are known pain point in linux guests.


Christophe Fergeau píše v Pá 16. 11. 2012 v 11:52 +0100:
> Hey,
> On Fri, Nov 16, 2012 at 01:14:39AM +0000, Jodi Curtis wrote:
> > Having fought my way through getting used to KVM, I have installed a
> > development desktop along side some servers, and the performance is
> > unusable.
> > 
> > The Ubuntu GUI seems very slow and not very responsive. It was not as bad
> > as VGA but it is still unusable, all I need is to work in a development gui
> > and do the things developers do, but if I can't even get text entered in at
> > normal speed, and have menu's responsive enough to use, it's not much good
> > to me.
> Have you tried other desktop environments than Ubuntu GUI? (I assume this is
> Unity3d?) The 3d rendering has to be done in software, and I'm not sure
> how Unity behaves in such setups, so worth checking with another desktop
> environment not relying on 3d.
> Christophe
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> Spice-devel at lists.freedesktop.org
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David Jaša, RHCE

SPICE QE based in Brno
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