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88 lines
3.5 KiB
C++
88 lines
3.5 KiB
C++
/*
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Copyright 2020 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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#ifndef CHOW_PATEL_ILU_HEADER_INCLUDED
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#define CHOW_PATEL_ILU_HEADER_INCLUDED
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#include <mutex>
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#include <opm/simulators/linalg/bda/opencl.hpp>
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namespace bda
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{
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// This class implements a blocked version on GPU of the Fine-Grained Parallel ILU (FGPILU) by Chow and Patel 2015:
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// FINE-GRAINED PARALLEL INCOMPLETE LU FACTORIZATION, E. Chow and A. Patel, SIAM 2015, https://doi.org/10.1137/140968896
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// only blocksize == 3 is supported
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// decomposition() allocates the cl::Buffers on the first call, these are C++ objects that deallocate automatically
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class ChowPatelIlu
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{
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private:
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cl::Buffer d_Ut_vals, d_L_vals, d_LU_vals;
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cl::Buffer d_Ut_ptrs, d_Ut_idxs;
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cl::Buffer d_L_rows, d_L_cols;
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cl::Buffer d_LU_rows, d_LU_cols;
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cl::Buffer d_Ltmp, d_Utmp;
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cl::Event event;
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std::vector<cl::Event> events;
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cl_int err;
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std::once_flag initialize_flag;
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std::unique_ptr<cl::make_kernel<cl::Buffer&, cl::Buffer&, cl::Buffer&,
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cl::Buffer&, cl::Buffer&, cl::Buffer&,
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cl::Buffer&, cl::Buffer&, cl::Buffer&,
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cl::Buffer&, cl::Buffer&,
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const int, cl::LocalSpaceArg, cl::LocalSpaceArg> > chow_patel_ilu_sweep_k;
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public:
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/// Executes the ChowPatelIlu sweeps
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/// also copies data from CPU to GPU and GPU to CPU
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/// \param[in] queue OpenCL commandqueue
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/// \param[in] context OpenCL context
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/// \param[in] Ut_ptrs BSC columnpointers
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/// \param[in] Ut_idxs BSC rowindices
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/// \param[inout] Ut_vals actual nonzeros for U
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/// \param[in] Ut_nnzbs number of blocks in U
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/// \param[in] L_rows BSR rowpointers
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/// \param[in] L_cols BSR columnindices
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/// \param[inout] L_vals actual nonzeroes for L
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/// \param[in] L_nnzbs number of blocks in L
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/// \param[in] LU_rows BSR rowpointers
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/// \param[in] LU_cols BSR columnindices
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/// \param[in] LU_vals actual nonzeroes for LU (original matrix)
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/// \param[in] LU_nnzbs number of blocks in LU
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/// \param[in] Nb number of blockrows
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/// \param[in] num_sweeps number of sweeps to be done
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/// \param[in] verbosity print verbosity
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void decomposition(
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cl::CommandQueue *queue, cl::Context *context,
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int *Ut_ptrs, int *Ut_idxs, double *Ut_vals, int Ut_nnzbs,
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int *L_rows, int *L_cols, double *L_vals, int L_nnzbs,
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int *LU_rows, int *LU_cols, double *LU_vals, int LU_nnzbs,
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int Nb, int num_sweeps, int verbosity);
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};
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} // end namespace bda
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#endif // CHOW_PATEL_ILU_HEADER_INCLUDED
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