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solver_petsc.cc
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Wed, Aug 28, 20:22
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rAKA akantu
solver_petsc.cc
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/**
* @file solver_petsc.cc
*
* @author Alejandro M. Aragón <alejandro.aragon@epfl.ch>
* @author Aurelia Isabel Cuba Ramos <aurelia.cubaramos@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Tue May 13 2014
* @date last modification: Sun Aug 13 2017
*
* @brief Solver class implementation for the petsc solver
*
*
* Copyright (©) 2014-2018 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* Akantu is free software: you can redistribute it and/or modify it under the
* terms of the GNU Lesser General Public License as published by the Free
* Software Foundation, either version 3 of the License, or (at your option) any
* later version.
*
* Akantu 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 Lesser General Public License for more
* details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with Akantu. If not, see <http://www.gnu.org/licenses/>.
*
*/
/* -------------------------------------------------------------------------- */
#include "solver_petsc.hh"
#include "dof_manager_petsc.hh"
#include "mpi_communicator_data.hh"
#include "solver_vector_petsc.hh"
#include "sparse_matrix_petsc.hh"
/* -------------------------------------------------------------------------- */
#include <petscksp.h>
//#include <petscsys.h>
/* -------------------------------------------------------------------------- */
namespace
akantu
{
/* -------------------------------------------------------------------------- */
SolverPETSc
::
SolverPETSc
(
DOFManagerPETSc
&
dof_manager
,
const
ID
&
matrix_id
,
const
ID
&
id
)
:
SparseSolver
(
dof_manager
,
matrix_id
,
id
),
dof_manager
(
dof_manager
),
matrix
(
dof_manager
.
getMatrix
(
matrix_id
))
{
auto
&&
mpi_comm
=
dof_manager
.
getMPIComm
();
/// create a solver context
PETSc_call
(
KSPCreate
,
mpi_comm
,
&
this
->
ksp
);
}
/* -------------------------------------------------------------------------- */
SolverPETSc
::~
SolverPETSc
()
{
if
(
ksp
!=
nullptr
)
{
PETSc_call
(
KSPDestroy
,
&
ksp
);
}
}
/* -------------------------------------------------------------------------- */
void
SolverPETSc
::
setOperators
()
{
// set the matrix that defines the linear system and the matrix for
// preconditioning (here they are the same)
#if PETSC_VERSION_MAJOR >= 3 && PETSC_VERSION_MINOR >= 5
PETSc_call
(
KSPSetOperators
,
ksp
,
this
->
matrix
.
getMat
(),
this
->
matrix
.
getMat
());
#else
PETSc_call
(
KSPSetOperators
,
ksp
,
this
->
matrix
.
getMat
(),
this
->
matrix
.
getMat
(),
SAME_NONZERO_PATTERN
);
#endif
// If this is not called the solution vector is zeroed in the call to
// KSPSolve().
PETSc_call
(
KSPSetInitialGuessNonzero
,
ksp
,
PETSC_TRUE
);
PETSc_call
(
KSPSetFromOptions
,
ksp
);
AKANTU_DEBUG_OUT
();
}
/* -------------------------------------------------------------------------- */
void
SolverPETSc
::
solve
()
{
Vec
&
rhs
(
this
->
dof_manager
.
getResidual
());
Vec
&
solution
(
this
->
dof_manager
.
getSolution
());
PETSc_call
(
KSPSolve
,
ksp
,
rhs
,
solution
);
}
}
// namespace akantu
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