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overlappingpreconditioner.hh
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// -*- mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
// vi: set et ts=4 sw=4 sts=4:
/*
This file is part of the Open Porous Media project (OPM).
OPM is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
OPM is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with OPM. If not, see <http://www.gnu.org/licenses/>.
Consult the COPYING file in the top-level source directory of this
module for the precise wording of the license and the list of
copyright holders.
*/
#ifndef EWOMS_OVERLAPPING_PRECONDITIONER_HH
#define EWOMS_OVERLAPPING_PRECONDITIONER_HH
#include "overlappingscalarproduct.hh"
#include <opm/common/Exceptions.hpp>
#include <opm/simulators/linalg/ilufirstelement.hh> //definitions needed in next header
#include <dune/istl/preconditioner.hh>
#include <dune/common/version.hh>
namespace Opm {
namespace Linear {
template <class SeqPreCond, class Overlap>
class OverlappingPreconditioner
: public Dune::Preconditioner<typename SeqPreCond::domain_type,
typename SeqPreCond::range_type>
{
public:
using domain_type = typename SeqPreCond::domain_type;
using range_type = typename SeqPreCond::range_type;
Dune::SolverCategory::Category category() const override
{ return Dune::SolverCategory::overlapping; }
OverlappingPreconditioner(SeqPreCond& seqPreCond, const Overlap& overlap)
: seqPreCond_(seqPreCond), overlap_(&overlap)
{}
void pre(domain_type& x, range_type& y) override
{
#if HAVE_MPI
short success;
try
{
seqPreCond_.pre(x, y);
short localSuccess = 1;
MPI_Allreduce(&localSuccess, // source buffer
&success, // destination buffer
1, // number of objects in buffers
MPI_SHORT, // data type
MPI_MIN, // operation
MPI_COMM_WORLD); // communicator
}
catch (...)
{
short localSuccess = 0;
MPI_Allreduce(&localSuccess, // source buffer
&success, // destination buffer
1, // number of objects in buffers
MPI_SHORT, // data type
MPI_MIN, // operation
MPI_COMM_WORLD); // communicator
}
if (success) {
x.sync();
}
else
throw NumericalProblem("Preconditioner threw an exception in pre() method on some process.");
#else
seqPreCond_.pre(x, y);
#endif
// communicate the results on the overlap
x.sync();
y.sync();
}
void apply(domain_type& x, const range_type& d) override
{
#if HAVE_MPI
if (overlap_->peerSet().size() > 0) {
// make sure that all processes react the same if the
// sequential preconditioner on one process throws an
// exception
short success;
try
{
// execute the sequential preconditioner
seqPreCond_.apply(x, d);
short localSuccess = 1;
MPI_Allreduce(&localSuccess, // source buffer
&success, // destination buffer
1, // number of objects in buffers
MPI_SHORT, // data type
MPI_MIN, // operation
MPI_COMM_WORLD); // communicator
}
catch (...)
{
short localSuccess = 0;
MPI_Allreduce(&localSuccess, // source buffer
&success, // destination buffer
1, // number of objects in buffers
MPI_SHORT, // data type
MPI_MIN, // operation
MPI_COMM_WORLD); // communicator
}
if (success) {
x.sync();
}
else
throw NumericalProblem("Preconditioner threw an exception on some process.");
}
else
#endif // HAVE_MPI
seqPreCond_.apply(x, d);
}
void post(domain_type& x) override
{
#if HAVE_MPI
short success;
try
{
seqPreCond_.post(x);
short localSuccess = 1;
MPI_Allreduce(&localSuccess, // source buffer
&success, // destination buffer
1, // number of objects in buffers
MPI_SHORT, // data type
MPI_MIN, // operation
MPI_COMM_WORLD); // communicator
}
catch (...)
{
short localSuccess = 0;
MPI_Allreduce(&localSuccess, // source buffer
&success, // destination buffer
1, // number of objects in buffers
MPI_SHORT, // data type
MPI_MIN, // operation
MPI_COMM_WORLD); // communicator
}
if (success) {
x.sync();
}
else
throw NumericalProblem("Preconditioner threw an exception in post() method on "
"some process.");
#else
seqPreCond_.post(x);
#endif
}
private:
SeqPreCond& seqPreCond_;
const Overlap *overlap_;
};
} // namespace Linear
} // namespace Opm
#endif
Opm::Linear::OverlappingPreconditioner
An overlap aware preconditioner for any ISTL linear solver.
Definition overlappingpreconditioner.hh:48
Opm::Linear::OverlappingPreconditioner::category
Dune::SolverCategory::Category category() const override
the kind of computations supported by the operator. Either overlapping or non-overlapping
Definition overlappingpreconditioner.hh:54
Opm
This file contains a set of helper functions used by VFPProd / VFPInj.
Definition blackoilbioeffectsmodules.hh:43
overlappingscalarproduct.hh
An overlap aware ISTL scalar product.