[gentoo-user] Kernel 2.6 and OpenGL

[marcin]

Hi

I've been comparing lately performance OpenGL apps against different
kernels 2.6.x and 2.4. Overall performance is comparable but a scheduler
of kernel 2.6 is very annoying (to say at least).

Simple test:

Kernel 2.6

"glxgears" gives 1320 fps but if I simultaneously execute (for example) "nbench"
which takes a lot of cpu then fps drop to 5!!! with "nice nbench" fps drop to 20

Kernel 2.4

"glxgears" gives 1340 fps but for nbench fps drop to 120 and
for nice nbench drop to 220 fps.

I've been testing against

* 2.6.16.14 Preemption Model: No Forced and also  Voluntary Kernel
* 2.6.16-ck9 is quite good at least scheduler don't starve but a drop
of fps is the same.
* 2.6.15.x
* 2.4.32

Graphics driver: nvidia (GeForce4 MX 440 AGP 8x) NV18

Can anyone tell me how to "increase priority" for OpenGL?

Thanks, Marcin

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