Bug#359328: direct rendering performance drop after 6.9.0 -> 7.0 upgrade

[Michel Dänzer]

On Tue, 2006-06-06 at 10:00 -0700, Slaven wrote:
> 
> In order to make it work again I had to install 2.6.16 kernel from unstable 
> and 6.5 Mesa packages from experimental. That restored direct rendering, 
> however it seems that performance is much worse than before the upgrade. 
> glxgears would report around 700 fps for the 7.0 version compared to 1100 fps 
> for 6.9.0. Also the cpu load is now about 70% when running glxgears as 
> opposed to less than 10% before the upgrade. 

First of all, glxgears is not a benchmark.

That said, there were some performance regressions when rotation support
was added that have only been fixed recently in CVS. Not sure that the
fixes are in the experimental packages yet.


> I personally don't need dri, but this and other problems reported here may 
> suggest that more caution is needed when patching debian xorg packages. 

The incompatibility is purely an upstream issue. The only thing specific
to Debian is the combination of upstream versions.


-- 
Earthling Michel Dänzer           |          http://tungstengraphics.com
Libre software enthusiast         |          Debian, X and DRI developer