Radeon M9000 glxgears performance strangeness.

[Michel Dänzer]

On Thu, 2005-03-10 at 16:24 +1100, Marek Wawrzyczny wrote:
> 
> 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 

Mobility Radeon 9000 aka M9?


> 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.

The driver realizes that it doesn't need to render anything and just
sleeps a bit instead.

Anyway, glxgears scores can only be compared at the default window size,
but even then their significance is rather limited.


> Also, what kind of performance can I expect under Linux? I have found 
> references to Radeon M7000 (?) 

I guess you mean Mobility Radeon 7500 aka M7?

> users getting ~1500 fps under similar setup...

I can get up to almost 3000 fps with an M9 by running current X.org,
Mesa and DRM CVS and making sure that page flipping, HyperZ and colour
tiling are enabled.


-- 
Earthling Michel Dänzer      |     Debian (powerpc), X and DRI developer
Libre software enthusiast    |   http://svcs.affero.net/rm.php?r=daenzer