Re: OpenGL speed problems under bash vs. DOS on Dell m60

[Andre Bleau <bleau at igb dot umontreal dot ca>]

"Robert J. Bobrow" <rusty at bbn dot com> wrote:
> Cygwin OpenGL folks,
> I have been having problems with the latest version of Cygwin on a Dell 
> M60. I have a piece of Java (JOGL) based visualization code that works 
> fine (renders at ~14 frames/second) on other machines, both laptops and 
> desktops. On the M60 with the newest Cygwin the speed drops to 2 
> frames/second, when I run the code from bash. When I run the identical 
> code from a DOS prompt, the code runs 7 times faster. It is as if under 
> bash, the opengl does not realize that the nVidia card is there, and does 
> everything in software. A further test shows that if I run a command shell 
> (cmd) under bash, and then start up my code, the display runs as fast as 
> it does under the DOS prompt.
>
> Do you have any idea why this is likely to be the case. I would hate to 
> give up using bash for my work.
> --Rusty Bobrow
> Division Scientist
> BBN Technologies

Cygwin's OpenGL package just provides a way for programs compiled with 
Cygwin's gcc or g++ to call _native_ (Windows version) of OpenGL, GLU, or 
GLUT. These 3 libraries are not compiled with Cygwin, so it is likely that 
the slowdown origins in some other part of your code, maybe Java-related.

The only libs of the package compiled with Cygwin are GLUI and GLUIX; are 
you using these?

If you need further help, please provide the output of cygcheck as an 
attachment in your next mailing, as specified in 
<http://cygwin.com/problems.html>http://cygwin.com/problems.<http://cygwin.com/problems.html>html 
.



André Bleau, Cygwin's OpenGL package maintainer.

Please address all questions and problem reports about Cygwin's OpenGL 
package to cygwin@cygwin.com . 


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