[Nouveau] Bad performace for NV18 driver

[Carlos Garces]

Hi!

I have some strange results on my test with nouveau drivers

I'm using a old GeForce4 MX 4000 (NV18) with 128 MB.

I have made 2 test.

-The default configuration, using nomodeset without nouveau_vieux_dri.so

$inxi -G
Graphics:  Card: NVIDIA NV18 [GeForce4 MX 4000]
           X.Org: 1.12.4 drivers: vesa,nouveau (unloaded: fbdev)
Resolution: 1024x768 at 0.0hz
           GLX Renderer: N/A GLX Version: N/A

-The "optimized" configuration, after removing nomodeset, installing
the 3d driver (nouveau_vieux_dri.so, package libgl1-mesa-dri) and
configure the xorg to use only nouveau

$inxi -G
Graphics:  Card: NVIDIA NV18 [GeForce4 MX 4000] X.Org: 1.12.4 driver:
nouveau Resolution: 800x600 at 85.1hz
           GLX Renderer: Mesa DRI nv18 x86/MMX+/3DNow!+/SSE GLX
Version: 1.2 Mesa 8.0.5

The resolution is 800x600 because was impossible for me set up  1024x768

There is the full xorg log
http://pastebin.com/2ZbMwyRK

The results are strange for me. I expect better performance on
"optimized" configuration but some test using Cairo are very bad (0,54
vs  5,38).

The test are available at
http://openbenchmarking.org/result/1306076-UT-2DGPUTEST63

Any idea to improve the performace of NV18?
Any know issue with nouveau_vieux_dri.so and NV18?