[Bf-cycles] Cuda on OSX broken

[Thomas Dinges]

Hi,
please also keep in mind that we officially don't support sm_12 and 
older! It's possible that there are issues or limitations due to 
hardware or recent code additions in Blender.

Regards,
Thomas

Am 30.10.2012 15:10, schrieb Sebastian Röthlisberger:
> Hi there,
>
> since some weeks (at least) me and Lúthien Merilin are not able to build the CUDA Kernels anymore. Always the same Error.
>
> Code:
> ptxas info    : Compiling entry function 'kernel_cuda_shader' for 'sm_12'
> ptxas info    : Used 24 registers, 4300+0 bytes lmem, 24+16 bytes smem, 1152 bytes cmem[0], 5876 bytes cmem[1]
> ptxas info    : Compiling entry function 'kernel_cuda_tonemap' for 'sm_12'
> ptxas info    : Used 7 registers, 48+16 bytes smem, 1152 bytes cmem[0], 20 bytes cmem[1]
> ptxas info    : Compiling entry function 'kernel_cuda_path_trace' for 'sm_12'
> ptxas(19657) malloc: *** mmap(size=266240) failed (error code=12)
> *** error: can't allocate region
> *** set a breakpoint in malloc_error_break to debug
> ptxas fatal   : Memory allocation failure
> scons: *** [/blender-build/build/darwin/intern/cycles/kernel/kernel_sm_12.cubin] Error 255
> scons: building terminated because of errors.
>
>
> tried with osx 10.7.5 - XCode 4.2 - 4.5.1 - CUDA Dev Tools + Driver from 4.0, 4.1, 4.2, 5.0.24, 5.0.36
> then reinstalled the complete system to osx 10.8.5, same error with all possible combinations.
>
> As i remember correctly, the issue began with upgrade CUDA Dev tools to 5.0.24 + GPU Driver 8.0.61 295.30.20f02
> unfortunately, since the os already upgraded i can't downgrade the GPU Driver. (And i'm not entirely sure it is causing the Problem.)
>
> it seems like an ordinary Out of Memory issue, but the Point is i've got 1.29Gb (from 8) free Memory while this is happening...
>
> tried to find anything about either ptxas Error code 12 or scons Error 255, found nothing.
>
> Strange thing as well is, with CUDA dev tools 4.0 if i start Blender without the kernels it's able to build it, without error..
>
> So my questions:
>
> Is there something wrong in the sourcefiles?
> Does it seem possible that this GPU Driver is causing the Error?
> Is there a difference from building from scons to building Blender "internally"?
> Anyone able to build CUDA Kernels on OSX? if yes, which GPU Driver Version?
>
> thanks for any idea
>
> bashi
>
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-- 
Thomas Dinges
Blender Developer, Artist and Musician

www.dingto.org