[Bug 27434] [rv710] low 3d perfomance in general

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=27434

--- Comment #6 from Stefan Dösinger <stefandoesinger at gmx.at> 2011-09-03 13:34:57 PDT ---
I get very bad GPU-side performance on my Radeon X1600 GPU with r300g as well.
For example, ut2004 with maxed out settings at 1440x900 runs at 5-20 fps, in
very intensive fighting down to 1-2 fps. On Windows XP(same settings, GL
renderer) it generally runs at 30-60 fps, in very intense fighting at 15-20.

The game is GPU limited with Mesa, the CPU utilization is about 20% on one
core, the other core is idle. On Windows the game may be CPU limited - 100% CPU
utilization on one core. It is also possible that the Windows driver uses busy
waiting when waiting for the GPU.

etracer is runs at 30 FPS at 1440x900 and otherwise default settings, it is
also GPU limited. This is unexpected as the game doesn't use any fancy fragment
processing - just plain texture mapping and some environment mapping.

I'm adding this here because there are a few bug reports about performance, but
none of is really useful. This bug report seems more reasonable.

Aside from performance r300g works really well. The slowness is the main issue
that prevents me from "productively" using it for games.

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