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Hello,

Currently I would like to use H2Opus to accelerate my home made 3D electrostatic BEM solver (Boundary Element Method) which runs on the GPU. The N cells data used to build an NxN non symmetric dense matrix are stored in the GPU memory and the matrix elements are thus computed on the GPU. I would like to know if H2Opus has a method to construct a non symmetric HMatrix directly on the GPU.

Thanks a lot for any answer/clue and for this very promising library.

Hi,

Up to now I managed to compile H2Opus on a laptop running Ubuntu 22.04 LTS with Cuda 11.5 and with a Quadro RTX 5000 (16 GB). However, when trying to compile the examples, there are some missing functions or other bugs.

For eig:
/opt/nvidia/hpc_sdk/Linux_x86_64/22.5/cuda//bin/nvcc -I/home/quemener/local/h2opus/include -I/opt/intel/oneapi/mkl/include -I/include -I/home/quemener/local/kblas-gpu/include -I/home/quemener/local/magma-2.6.0/include -I//include -I/include -I/home/quemener/install/include -I/home/quemener/PETSc/petsc//include -I/home/quemener/PETSc/petsc/include -x cu -m64 -O3 -std=c++14 --expt-relaxed-constexpr -ccbin g++ -gencode arch=compute_75,code=sm_75 -Xcompiler -Wall -Xcompiler -fPIC -Xcompiler -fopenmp -Xcompiler -O3 -Xcompiler -std=c++14 -Xcompiler -pthread -Xcompiler -DH2OPUS_PROFILING_ENABLED -o obj/test_eig_slepc.o -c test_eig_slepc.cpp

test_eig_slepc.cpp(64): error: identifier "MatCreateH2OpusFromKernel" is undefined
test_eig_slepc.cpp(72): error: identifier "MatH2OpusSetNativeMult" is undefined

For hara:
/opt/nvidia/hpc_sdk/Linux_x86_64/22.5/cuda//bin/nvcc -I/home/quemener/local/h2opus/include -I/opt/intel/oneapi/mkl/include -I/include -I/home/quemener/local/kblas-gpu/include -I/home/quemener/local/magma-2.6.0/include -x cu -m64 -O3 -std=c++14 --expt-relaxed-constexpr -ccbin g++ -gencode arch=compute_75,code=sm_75 -Xcompiler -Wall -Xcompiler -fPIC -Xcompiler -fopenmp -Xcompiler -O3 -Xcompiler -std=c++14 -Xcompiler -pthread -Xcompiler -DH2OPUS_PROFILING_ENABLED -o obj/test_hara.o -c test_hara.cpp
test_hara.cpp(189): error: identifier "ReconstructSampler" is undefined

test_hara.cpp(189): error: identifier "gpu_reconstruct_sampler" is undefined

For spatialstatistics:
spatial_statistics.cpp(73): error: identifier "MatCreateH2OpusFromKernel" is undefined
spatial_statistics.cpp(95): error: identifier "MatH2OpusCompress" is undefined
spatial_statistics.cpp(125): error: identifier "MatH2OpusSetNativeMult" is undefined

For tlr:
$ test_tlr
Tile Size = 512. ARA Block size = 32
Construction threshold = 1.000000e-06. Cholesky threshold = 1.000000e-06. Diagonal shift s = 0.000000e+00
Erreur de segmentation (core dumped)

Where could I get the missing functions which are not included in the repository files ?

Thanks a lot for any help,

Gilles