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[SOLVED] OpenCL GpuSoftBodySolvers (non-SIMD-aware) issue
Posted: Fri Sep 16, 2011 8:58 pm
by gjunker
When I try to disable the USE_SIMDAWARE_SOLVER flag in the OpenCLClothDemo code, I run into a problem with compiling shadesr, First, it appears that the non-SIMD-aware solvers do not actually call buildShaders() like the SIMD version does. Second, when I add a call in the non-SIMD-aware solver to call buildShaders() (in the same place as the SIMD-aware one does, at the end of optimize()), the shaders fail to build.
Is the OpenCL support in the soft-body solvers restricted only to "SIMD-aware" now? IOW, it looks like the non-SIMD-aware code paths no longer are tested -- is this the case?
Thanks
Greg
Re: OpenCL GpuSoftBodySolvers (non-SIMD-aware) issue
Posted: Fri Sep 16, 2011 9:30 pm
by gjunker
NM I think I found it -- I was wondering about this when I was looking through the non-SIMD-aware code and coulnd't find some of these kernel names. I added some additional error message generation code to CLFunctions::compileCLKernelFromString in btSoftBodySovler_OpenCL.cpp, and see
Code: Select all
compiling kernelName: m_prepareLinksKernel Error in clCreateKernel for kernel 'm_prepareLinksKernel', error is "kernel_name is not found in program.", Line 1529 in file /usr/pic1/gjunker/projects/bullet/src/BulletMultiThreaded/GpuSoftBodySolvers/OpenCL/btSoftBodySolver_OpenCL.cpp !!!
Fixing the kernel names in the calls to this method solves the problem. I'll do up a patch for it.
Re: [SOLVED] OpenCL GpuSoftBodySolvers (non-SIMD-aware) issu
Posted: Fri Sep 16, 2011 9:42 pm
by Erwin Coumans
Are you using Bullet 2.78 or a svn trunk version? I think this already was fixed in the latest trunk, but I'll double check and fix it.
Thanks for the report!
Erwin
Re: [SOLVED] OpenCL GpuSoftBodySolvers (non-SIMD-aware) issu
Posted: Fri Sep 16, 2011 9:45 pm
by gjunker
Latest (as of about 5 min ago) trunk. I didn't see a fix unless you had fixed it in ahother file? I was only looking in btSoftBodySolver_OpenCL.cpp.
About to send up the patch now.
[edit:
http://code.google.com/p/bullet/issues/detail?id=546]
Thanks!
Greg
Re: [SOLVED] OpenCL GpuSoftBodySolvers (non-SIMD-aware) issu
Posted: Fri Sep 16, 2011 9:58 pm
by Erwin Coumans
It is already fixed in trunk
Thanks for the report!
Erwin
Re: [SOLVED] OpenCL GpuSoftBodySolvers (non-SIMD-aware) issu
Posted: Fri Sep 16, 2011 9:59 pm
by Erwin Coumans
Ah, I missed your patch so I didn't apply the other changes.
Thanks,
Erwin
Re: [SOLVED] OpenCL GpuSoftBodySolvers (non-SIMD-aware) issu
Posted: Fri Sep 16, 2011 10:01 pm
by gjunker
Not a problem, sometimes fixes cross each other in the SCM.
