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solver_vector_petsc.cc
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solver_vector_petsc.cc
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/**
* @file solver_vector_petsc.cc
*
* @author Nicolas Richart
*
* @date creation Tue Jan 01 2019
*
* @brief A Documented file.
*
* @section LICENSE
*
* Copyright (©) 2010-2011 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_vector_petsc.hh"
#include "dof_manager_petsc.hh"
#include "mpi_communicator_data.hh"
/* -------------------------------------------------------------------------- */
#include <petscvec.h>
/* -------------------------------------------------------------------------- */
namespace akantu {
/* -------------------------------------------------------------------------- */
SolverVectorPETSc::SolverVectorPETSc(DOFManagerPETSc & dof_manager,
const ID & id)
: SolverVector(dof_manager, id), dof_manager(dof_manager) {}
/* -------------------------------------------------------------------------- */
SolverVectorPETSc::SolverVectorPETSc(const SolverVectorPETSc & vector,
const ID & id)
: SolverVector(vector, id), dof_manager(vector.dof_manager) {
if (vector.x) {
PETSc_call(VecDuplicate, vector.x, &x);
PETSc_call(VecCopy, vector.x, x);
detail::PETScSetName(x, id);
}
}
/* -------------------------------------------------------------------------- */
SolverVectorPETSc::SolverVectorPETSc(Vec x, DOFManagerPETSc & dof_manager,
const ID & id)
: SolverVector(dof_manager, id), dof_manager(dof_manager) {
PETSc_call(VecDuplicate, x, &this->x);
PETSc_call(VecCopy, x, this->x);
detail::PETScSetName(x, id);
}
/* -------------------------------------------------------------------------- */
SolverVectorPETSc::~SolverVectorPETSc() {
if (x) {
PETSc_call(VecDestroy, &x);
}
}
/* -------------------------------------------------------------------------- */
void SolverVectorPETSc::resize() {
if (not x) {
auto && mpi_comm = dof_manager.getMPIComm();
PETSc_call(VecCreate, mpi_comm, &x);
detail::PETScSetName(x, id);
}
auto local_system_size = dof_manager.getLocalSystemSize();
auto nb_local_dofs = dof_manager.getPureLocalSystemSize();
PETSc_call(VecSetSizes, x, nb_local_dofs, PETSC_DECIDE);
VecType vec_type;
PETSc_call(VecGetType, x, &vec_type);
if (vec_type == VECMPI) {
std::vector<PetscInt> idx;
idx.reserve(local_system_size - nb_local_dofs);
for (auto && d : arange(dof_manager.getLocalSystemSize())) {
if (not dof_manager.isLocalOrMasterDOF(d)) {
idx.push_back(dof_manager.localToGlobalEquationNumber(d));
}
}
AKANTU_DEBUG_ASSERT(
idx.size() == (local_system_size - nb_local_dofs),
"One developer that I will not name does not know how to count");
PETSc_call(VecMPISetGhost, x, idx.size(), idx.data());
}
auto & is_ltog_mapping = dof_manager.getISLocalToGlobalMapping();
PETSc_call(VecSetLocalToGlobalMapping, x, is_ltog_mapping);
}
/* -------------------------------------------------------------------------- */
void SolverVectorPETSc::clear() {
PETSc_call(VecSet, x, 0.);
applyModifications();
}
/* -------------------------------------------------------------------------- */
void SolverVectorPETSc::applyModifications() {
PETSc_call(VecAssemblyBegin, x);
PETSc_call(VecAssemblyEnd, x);
}
/* -------------------------------------------------------------------------- */
SolverVectorPETSc::operator const Array<Real> &() const {
const_cast<Array<Real> &>(cache).resize(local_size());
auto xl = internal::make_petsc_local_vector(x);
auto cachep = internal::make_petsc_wraped_vector(this->cache);
PETSc_call(VecCopy, cachep, xl);
return cache;
}
} // namespace akantu

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