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87 lines
2.9 KiB
Plaintext
87 lines
2.9 KiB
Plaintext
/*
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Copyright 2021 Equinor ASA
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This file is part of the Open Porous Media project (OPM).
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OPM is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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OPM is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with OPM. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <config.h>
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#include <sstream>
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#include <opm/common/OpmLog/OpmLog.hpp>
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#include <amgcl/backend/cuda.hpp>
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#include <amgcl/relaxation/cusparse_ilu0.hpp>
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#include <opm/simulators/linalg/bda/amgclSolverBackend.hpp>
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/// This file is only compiled when both amgcl and CUDA are found by CMake
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namespace Opm::Accelerator {
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template<class Scalar, unsigned int block_size>
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void amgclSolverBackend<Scalar,block_size>::solve_cuda(Scalar* b)
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{
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using CUDA_Backend = amgcl::backend::cuda<Scalar>;
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using CUDA_Solver = amgcl::make_solver<amgcl::runtime::preconditioner<CUDA_Backend>,
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amgcl::runtime::solver::wrapper<CUDA_Backend>>;
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static typename CUDA_Backend::params CUDA_bprm; // amgcl backend parameters, only used for cusparseHandle
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// initialize cusparse handle for amgcl, cannot merge this call_once with 'print solver structure'
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std::call_once(cuda_initialize, [&](){
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cudaDeviceProp prop;
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cudaGetDeviceProperties(&prop, deviceID);
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std::ostringstream out;
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out << prop.name << std::endl;
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OpmLog::info(out.str());
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cusparseCreate(&CUDA_bprm.cusparse_handle);
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});
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// create matrix object
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auto A = std::tie(N, A_rows, A_cols, A_vals);
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// create solver and construct preconditioner
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// don't reuse this unless the preconditioner can be reused
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CUDA_Solver solve(A, prm, CUDA_bprm);
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// print solver structure (once)
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std::call_once(print_info, [&](){
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std::ostringstream out;
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out << solve << std::endl;
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OpmLog::info(out.str());
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});
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thrust::device_vector<Scalar> B(b, b + N);
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thrust::device_vector<Scalar> X(N, 0.0);
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// actually solve
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std::tie(iters, error) = solve(B, X);
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thrust::copy(X.begin(), X.end(), x.begin());
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}
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#define INSTANTIATE_TYPE(T) \
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template void amgclSolverBackend<T,1>::solve_cuda(T*); \
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template void amgclSolverBackend<T,2>::solve_cuda(T*); \
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template void amgclSolverBackend<T,3>::solve_cuda(T*); \
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template void amgclSolverBackend<T,4>::solve_cuda(T*); \
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template void amgclSolverBackend<T,5>::solve_cuda(T*); \
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template void amgclSolverBackend<T,6>::solve_cuda(T*);
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INSTANTIATE_TYPE(double)
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} // namespace Opm::Accelerator
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