[Mesa-dev] Profiling video driver

[Michel Dänzer]

On Mit, 2011-10-12 at 22:54 +0200, Martin Stolpe wrote: 
> 
> I'm using the Gallium R300 driver with the Xorg state tracker on my system. 
> Everything is running very smoothly when I'm using OpenGL ES 2.0 composited 
> mode of kwin. Running for example Notepad++ in wine on the other hand is 
> painfully slow. I've tried to profile a Notepad++ session using oprofile but 
> it seems that the reason why for example scrolling is so slow is not catched 
> by oprofile. At least there is nothing which catches my eyes. I would have 
> expected that "r300_dri.so" or "r300_drv.so" would pop up in the profile log. 
> Is there a special way to profile graphics drivers?

Not really, but in the likely case that the slowness is relaeted to
software rendering fallbacks, a lot of cycles may be spent in X server
or libpixman code.

I prefer sysprof or perf over oprofile, YMMV.


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