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On 5/7/06, Eugene Rosenzweig <eugene259@××××××××××××.net> wrote: |
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> marcin wrote: |
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> > Hi |
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> > |
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> > I've been comparing lately performance OpenGL apps against different |
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> > kernels 2.6.x and 2.4. Overall performance is comparable but a scheduler |
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> > of kernel 2.6 is very annoying (to say at least). |
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> > |
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> > Simple test: |
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> > |
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> > Kernel 2.6 |
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> > |
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> > "glxgears" gives 1320 fps but if I simultaneously execute (for |
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> > example) "nbench" |
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> > which takes a lot of cpu then fps drop to 5!!! with "nice nbench" fps |
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> > drop to 20 |
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> > |
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> > Kernel 2.4 |
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> > |
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> > "glxgears" gives 1340 fps but for nbench fps drop to 120 and |
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> > for nice nbench drop to 220 fps. |
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> > |
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> > I've been testing against |
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> > |
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> > * 2.6.16.14 Preemption Model: No Forced and also Voluntary Kernel |
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> > * 2.6.16-ck9 is quite good at least scheduler don't starve but a drop |
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> > of fps is the same. |
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> > * 2.6.15.x |
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> > * 2.4.32 |
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> > |
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> > Graphics driver: nvidia (GeForce4 MX 440 AGP 8x) NV18 |
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> > |
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> > Can anyone tell me how to "increase priority" for OpenGL? |
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> > |
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> > Thanks, Marcin |
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> Is it any better if you are more agressive with nice? Like 'nice nbench' |
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> and 'nice -n -10 glxgears' or even more? |
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> |
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|
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In fact it is better. For example for nice -n 19 nbench |
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I got 50 fps increase. |
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|
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Marcin |
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|
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-- |
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