xf86-video-intel: Any 3D app is slow in resolution higher than 800x600 with UXA+DRI2

[Jesse Barnes]

On Monday, January 26, 2009 1:34 pm Vasily Khoruzhick wrote:
> On 26 January 2009 22:02:30 Jesse Barnes wrote:
> > On Sunday, January 25, 2009 12:33 pm Vasily Khoruzhick wrote:
> > > Hi, it seems I've found one more bug for gma950+uxa+dri2 configuration:
> > >
> > > Any 3D application is _really_ slow if it runs in window with size
> > > higher than 800x600.
> > >
> > > Steps to reproduce:
> > >
> > > 1. Use gma950 hardware with xf86-video-intel from git and mesa from
> > > git, xorg-server-1.5.99.901, libdrm from git, 2.6.28 kernel + 6 patches
> > > 2. Download and install secret maryo chronicles (or any game you like
> > > that uses 3D)
> > > 3. Disable fullscreen mode and set resolution to 800x600 - game should
> > > run smoothly
> > > 4. Disable fullscreen mode and set resolution to 1024x768 (or higher) -
> > > game should became unplayable.
> > >
> > > Same issue with compiz.
> >
> > The patchset I just posted to intel-gfx might help with this
> > (http://lists.freedesktop.org/archives/intel-gfx/2009-January/001172.html
> >); it allows for tiled rendering on 9xx chips w/DRI2.  On some machines it
> > makes a 10x difference.
>
> Sorry, but on which kernel I should apply first patch? It doesn't apply on
> 2.6.28 + 6 patches (2008 q4 :))

The kernel patch was against drm-intel-next of last week.

-- 
Jesse Barnes, Intel Open Source Technology Center