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Old 01-04-12, 02:24 PM   #1
cervo
Registered User
 
Join Date: Jun 2006
Posts: 34
Unhappy Linux is too slow??(FreeBSD vs Linux)

Hello,

I have developed 3D CG software on Ubuntu and FreeBSD.
I use OpenGL and GLSL on recent nvidia driver.

I have a trouble.
Linux is too slow in comparison with FreeBSD (or Windows).

Probably I think that it is independent of linux distribution and driver version.

I have examined Ubuntu 11.04, 11.10, Scientific linux 6.1, Cent OS 6.1 and Fedora 15 on some version of nvidia driver.


Does anyone know the reason?
I need the increase of the performance of our system on Linux.

I make benchmark software.

http://www2.nagano.ac.jp/n-tanaka/te...b-oglbench.tgz

<How to use>
% tar -zxvf ntlab-oglbench.tgz ; make
% ./ogl-bench 'division_level'

i.e.) division_level is 100
% ./ogl-bench 100


<results>
*** GeForce GTX580 ***
division_level 100
FreeBSD is 1724 fps
Linux is 690 fps

division_level 1000
FreeBSD is 317 fps
Linux is 20 fps

*** Quadro 2000 ***
division_level 100
FreeBSD is 1721 fps
Linux is 920 fps

division_level 1000
FreeBSD is 317 fps
Linux is 41 fps

<Our System>
OS:
FreeBSD 8.2-STABLE 64bit
Ubuntu Linux 11.10 64bit
Driver:
FreeBSD: nvidia driver 280.13
Linux: nvidia driver 290.10
CPU:
Intel Core i7 950 3.06GHz
MEM:
24GB
GPU:
NVIDIA Quadro 2000
NVIDIA GeForce GTX 580

Other setting information(Linux).
1. disable nouveau
2. disable Sync to VBlank
3. disable 3D desktop(compiz) setting
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