Radeon M9000 glxgears performance strangeness.

[Marek Wawrzyczny]

Hi all,

I know that glxgears is not the best tool to analyse the 3D performance but I 
have been trying to setup my Radeon M9000 card to take full advantage of 
hardware acceleration. I do understand that the drivers are in development, 
but having to compile my system... I sometimes wonder if my setting are not 
affecting the performance adversely. 

Specs:
Toshiba Tecra S1
Radeon M9000
XOrg 6.8.2 
xorg-x11 opengl implementation
radeon, dri, drm extensions loaded

Linux kernel 2.6.11-r2
Radeon kernel support compiled module.

Tests run in KDE 3.4 (RC).

The strangeness is that glxgears outputs:

localhost lib # glxgears
3382 frames in 5.0 seconds = 676.400 FPS
4038 frames in 5.0 seconds = 807.600 FPS
4037 frames in 5.0 seconds = 807.400 FPS
26068 frames in 5.0 seconds = 5213.600 FPS
49539 frames in 5.0 seconds = 9907.800 FPS
50223 frames in 5.0 seconds = 10044.600 FPS
50381 frames in 5.0 seconds = 10076.200 FPS
50044 frames in 5.0 seconds = 10008.800 FPS
 
The rather drastic jump in performance happens when the glxgears window goes 
into background and is fully covered by another window.

Also, what kind of performance can I expect under Linux? I have found 
references to Radeon M7000 (?) users getting ~1500 fps under similar setup...

-- 
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Marek Wawrzyczny

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"Terrorism is the war of the poor, 
and, war is terrorism of the rich."

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