[Mesa-users] llvmpipe os mesa with my own llvm

[Brian Paul]

On 05/21/2013 04:43 PM, Burlen Loring wrote:
> I have recently built and installed llvmpipe os mesa using my own llvm
> build on a new server. Using my regression tests I've observed that
> varying LP_NUM_THREADS has no affect on performance with this build, but
> it had a dramatic affect on my workstation (60 sec w/ 1 thread down to
> 11 sec w/16 threads).  The threading performance should be even better
> on the new server since it has vastly better cpu's each with 8 physical
> cores vs the old 4 core cpus on my workstation. Also comparing outputs
> of run on my workstation and the server this pixels are ~40% different,
> but the result looks pretty close to the eye.
>
>   I'm wondering what can explain the pixel difference and also the
> performance difference?  Could it be that I'm not really using the
> llvmpipe driver? or llvm JIT compilation for my shaders? I am sure
> lvvmpipe and osmesa tracker is built and installed but I'm at a loss has
> to debug further. setting GALLIUM_PRINT_OPTIONS does nothing. Any advice
> greatly appreciated.

As a first step you can call/print glGetString(GL_RENDERER) to verify 
that you're using llvmpipe.  I'm assuming this is your own app.

-Brian