OLPC and GLX

[M. Edward (Ed) Borasky]

Bryan Duff wrote:
> After compiling in mesa source to get GLX working on the FC7-based
> builds.  Running `glxgears -fullscreen` I get ~25 fps.  Compared to
> Ubuntu which gets 65 fps, this is rather poor.
> 
> I think the Ubuntu performance shows that 3D (albeit simple 3D) is very
> possible and worthwhile.
> 
> I've tried the amd and fbdev drivers - they make no performance
> difference.  Neither does i386 versus i586 (w/ mmx and 3dnow! included
> in cflags).
> 
> I haven't tried DRI.  I don't understand how it would help if I
> understand DRI correctly, but perhaps I'm missing something.  I have no
> idea if processes that are re-niced automatically, or  have some sort of
> resource limitation.
> 
> I'm using the default xorg.conf.  I hope the problem is something simple
> that I'm not seeing.
> 
> Thanks.
> 
> -Bryan Duff
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Have you profiled any of the code? Compiled it with gcc flags for the 
architecture (mmx and 3dnow)? Then again, maybe the AMD libraries have 
some assembler kernels for this.