Problem compiling deal.II with CUDA

[Sean Johnson]

Hey everyone,

Sorry I have been working on this problem for a few day. I believe the problem is with the mating of deal.II and CUDA because after installing CUDA it passed all the post installation tests. The error mentions the atomicAdd() function for doubles which is only for compute capability 6.x+ according to CUDA and my gpu is 5.0 but deal.II says it only needs compute capability of 3.2+ so I figure the problem isn't that simple. Below is the error code and attached are the log files.

Thanks for any help ahead of time! And sorry if there is anything I missed to include as this is my first post on here. I will correct it as soon as I can when notified. Thank you again!

Building CUDA object source/lac/CMakeFiles/obj_lac_release.dir/cuda_kernels.cu.o
nvcc warning : The 'compute_35', 'compute_37', 'compute_50', 'sm_35', 'sm_37' and 'sm_50' architectures are deprecated, and may be removed in a future release (Use -Wno-deprecated-gpu-targets to suppress warning).
/home/sjohnson/Downloads/dealii-9.4.1/include/deal.II/lac/cuda_atomic.h(54): error: no instance of overloaded function "atomicAdd" matches the argument list
            argument types are: (double *, double)

/home/sjohnson/Downloads/dealii-9.4.1/include/deal.II/lac/cuda_kernels.templates.h(96): error: no instance of overloaded function "atomicAdd" matches the argument list
            argument types are: (double *, const double)
          detected during instantiation of "Number dealii::LinearAlgebra::CUDAWrappers::kernel::ElemSum<Number>::atomic_op(Number *, Number) [with Number=double]"
/home/sjohnson/Downloads/dealii-9.4.1/source/lac/cuda_kernels.cu(160): here

/home/sjohnson/Downloads/dealii-9.4.1/include/deal.II/lac/cuda_kernels.templates.h(132): error: no instance of overloaded function "atomicAdd" matches the argument list
            argument types are: (double *, const double)
          detected during instantiation of "Number dealii::LinearAlgebra::CUDAWrappers::kernel::L1Norm<Number>::atomic_op(Number *, Number) [with Number=double]"
/home/sjohnson/Downloads/dealii-9.4.1/source/lac/cuda_kernels.cu(161): here

/home/sjohnson/Downloads/dealii-9.4.1/include/deal.II/lac/cuda_kernels.templates.h(272): error: no instance of overloaded function "atomicAdd" matches the argument list
            argument types are: (double *, const double)
          detected during instantiation of "Number dealii::LinearAlgebra::CUDAWrappers::kernel::DotProduct<Number>::atomic_op(Number *, Number) [with Number=double]"
/home/sjohnson/Downloads/dealii-9.4.1/source/lac/cuda_kernels.cu(175): here

4 errors detected in the compilation of "/home/sjohnson/Downloads/dealii-9.4.1/source/lac/cuda_kernels.cu".
make[2]: *** [source/lac/CMakeFiles/obj_lac_release.dir/build.make:583: source/lac/CMakeFiles/obj_lac_release.dir/cuda_kernels.cu.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:3790: source/lac/CMakeFiles/obj_lac_release.dir/all] Error 2
make: *** [Makefile:130: all] Error 2

[Daniel Arndt]

Sean,

we removed the implementation for atomic add for doubles for nvcc < 8 and compute capability < 6 in https://github.com/dealii/dealii/pull/10298 (maybe in error). I would expect that you could the code in that pull request as a patch.

Best,

Daniel

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[Bruno Turcksin]

Hello,

It looks like the documentation is not up to date. We do not support GPU your GPU, deal.II requires compute capability of at least 6.0. Sorry about that.

Best,

Bruno

[Sean Johnson]

Thanks! No problem with the documentation not being changed on the compute capability. With all the changes being made this is really just the smallest thing. Do I need to mark this solved or anything?

[Bruno Turcksin]

No, there is nothing to do.

Best,

Bruno

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