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84 lines
2.7 KiB
C++
84 lines
2.7 KiB
C++
/*
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Copyright 2024 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 OPM_PRECONDITIONER_HEADER_INCLUDED
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#define OPM_PRECONDITIONER_HEADER_INCLUDED
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#if HAVE_OPENCL
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#include <opm/simulators/linalg/bda/opencl/opencl.hpp>
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#endif
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namespace Opm::Accelerator {
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enum PreconditionerType {
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BILU0,
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CPR,
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BISAI
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};
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template<class Scalar> class BlockedMatrix;
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template<class Scalar, unsigned int block_size>
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class Preconditioner
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{
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protected:
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int N = 0; // number of rows of the matrix
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int Nb = 0; // number of blockrows of the matrix
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int nnz = 0; // number of nonzeroes of the matrix (scalar)
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int nnzb = 0; // number of blocks of the matrix
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int verbosity = 0;
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Preconditioner(int verbosity_) :
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verbosity(verbosity_)
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{};
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public:
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virtual ~Preconditioner() = default;
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static std::unique_ptr<Preconditioner> create(PreconditionerType type,
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bool opencl_ilu_parallel,
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int verbosity);
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#if HAVE_OPENCL
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// apply preconditioner, x = prec(y)
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virtual void apply(const cl::Buffer& y, cl::Buffer& x) = 0;
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#endif
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// apply preconditioner, x = prec(y)
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virtual void apply(Scalar& y, Scalar& x) = 0;
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// analyze matrix, e.g. the sparsity pattern
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// probably only called once
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// the version with two params can be overloaded, if not, it will default to using the one param version
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virtual bool analyze_matrix(BlockedMatrix<Scalar>* mat) = 0;
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virtual bool analyze_matrix(BlockedMatrix<Scalar>* mat,
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BlockedMatrix<Scalar>* jacMat) = 0;
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// create/update preconditioner, probably used every linear solve
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// the version with two params can be overloaded, if not, it will default to using the one param version
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virtual bool create_preconditioner(BlockedMatrix<Scalar>* mat) = 0;
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virtual bool create_preconditioner(BlockedMatrix<Scalar>* mat,
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BlockedMatrix<Scalar>* jacMat) = 0;
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};
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} // namespace Opm::Accelerator
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#endif
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