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rAKA/src/model/common/dof_manager/dof_manager_petsc.cc
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dof_manager_petsc.cc
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/**
* @file dof_manager_petsc.cc
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Wed Oct 07 2015
* @date last modification: Tue Feb 20 2018
*
* @brief DOFManaterPETSc is the PETSc implementation of the DOFManager
*
* @section LICENSE
*
* Copyright (©) 2015-2018 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 "dof_manager_petsc.hh"
#include "communicator.hh"
#include "cppargparse.hh"
#include "sparse_matrix_petsc.hh"
#include "non_linear_solver_petsc.hh"
#include "time_step_solver_default.hh"
#if defined(AKANTU_USE_MPI)
#include "mpi_communicator_data.hh"
#endif
/* -------------------------------------------------------------------------- */
#include <petscsys.h>
/* -------------------------------------------------------------------------- */
namespace akantu {
int DOFManagerPETSc::petsc_dof_manager_instances = 0;
/* -------------------------------------------------------------------------- */
DOFManagerPETSc::DOFManagerPETSc(const ID & id, const MemoryID & memory_id)
: DOFManager(id, memory_id) {
init();
}
/* -------------------------------------------------------------------------- */
DOFManagerPETSc::DOFManagerPETSc(Mesh & mesh, const ID & id,
const MemoryID & memory_id)
: DOFManager(mesh, id, memory_id) {
init();
}
/* -------------------------------------------------------------------------- */
void DOFManagerPETSc::init() {
// check if the akantu types and PETSc one are consistant
#if __cplusplus > 199711L
static_assert(sizeof(Int) == sizeof(PetscInt),
"The integer type of Akantu does not match the one from PETSc");
static_assert(sizeof(Real) == sizeof(PetscReal),
"The integer type of Akantu does not match the one from PETSc");
#else
AKANTU_DEBUG_ASSERT(
sizeof(Int) == sizeof(PetscInt),
"The integer type of Akantu does not match the one from PETSc");
AKANTU_DEBUG_ASSERT(
sizeof(Real) == sizeof(PetscReal),
"The integer type of Akantu does not match the one from PETSc");
#endif
#if defined(AKANTU_USE_MPI)
const auto & mpi_data = dynamic_cast<const MPICommunicatorData &>(
communicator.getCommunicatorData());
MPI_Comm mpi_comm = mpi_data.getMPICommunicator();
this->mpi_communicator = mpi_comm;
#else
this->mpi_communicator = PETSC_COMM_SELF;
#endif
PetscBool isInitialized;
PETSc_call(PetscInitialized, &isInitialized);
if (isInitialized) {
cppargparse::ArgumentParser & argparser = getStaticArgumentParser();
int & argc = argparser.getArgC();
char **& argv = argparser.getArgV();
PETSc_call(PetscInitialize, &argc, &argv, NULL, NULL);
PETSc_call(PetscPushErrorHandler, PetscIgnoreErrorHandler, NULL);
}
this->petsc_dof_manager_instances++;
PETSc_call(VecCreate, mpi_communicator, &this->residual);
PETSc_call(VecCreate, mpi_communicator, &this->solution);
}
/* -------------------------------------------------------------------------- */
DOFManagerPETSc::~DOFManagerPETSc() {
PETSc_call(VecDestroy, &(this->residual));
PETSc_call(VecDestroy, &(this->solution));
this->petsc_dof_manager_instances--;
if (this->petsc_dof_manager_instances == 0) {
PetscFinalize();
}
}
/* -------------------------------------------------------------------------- */
void DOFManagerPETSc::registerDOFs(const ID & dof_id, Array<Real> & dofs_array,
DOFSupportType & support_type) {
DOFManager::registerDOFs(dof_id, dofs_array, support_type);
PetscInt current_size;
PETSc_call(VecGetSize, this->residual, &current_size);
PetscInt local_size = this->pure_local_system_size;
PETSc_call(VecSetSizes, this->residual, local_size, system_size);
PetscInt start_dof, end_dof;
VecGetOwnershipRange(this->residual, &start_dof, &end_dof);
std::vector<PetscInt> global_indices(local_size);
global_indices[0] = start_dof;
for (PetscInt d = 0; d < local_size; d++)
global_indices[d + 1] = global_indices[d] + 1;
// To be change if we switch to a block definition
#if PETSC_VERSION_MAJOR >= 3 && PETSC_VERSION_MINOR >= 5
ISLocalToGlobalMappingCreate(this->mpi_communicator, 1, local_size,
global_indices.data(), PETSC_COPY_VALUES,
&this->is_ltog_map);
#else
ISLocalToGlobalMappingCreate(this->mpi_communicator, local_size,
global_indices, PETSC_COPY_VALUES,
&this->is_ltog_map);
#endif
VecSetLocalToGlobalMapping(this->residual, this->is_ltog_map);
}
/* -------------------------------------------------------------------------- */
void DOFManagerPETSc::assembleToResidual(const ID & dof_id,
const Array<Real> & array_to_assemble,
Real scale_factor) {
const auto & is = getDOFDataTyped<DOFDataPETSc>(dof_id).is;
Vec y;
PETSc_call(VecGetLocalVector, this->residual, y);
Vec x;
PETSc_call(VecCreateSeqWithArray, PETSC_COMM_SELF, 1,
array_to_assemble.size(), array_to_assemble.storage(), &x);
PETSc_call(VecISAXPY, y, is, scale_factor, x);
PETSc_call(VecRestoreLocalVector, y, this->residual);
PETSc_call(VecDestroy, &y);
PETSc_call(VecDestroy, &x);
}
/* -------------------------------------------------------------------------- */
void DOFManagerPETSc::clearResidual() {
PETSc_call(VecZeroEntries, this->residual);
}
/* -------------------------------------------------------------------------- */
void DOFManagerPETSc::clearMatrix(const ID & mtx) {
auto & matrix = this->getMatrix(mtx);
matrix.clear();
}
/* -------------------------------------------------------------------------- */
void DOFManagerPETSc::clearLumpedMatrix(const ID & mtx) {
auto & global_lumped = this->getLumpedMatrix(mtx);
PETSc_call(VecZeroEntries, global_lumped);
}
/* -------------------------------------------------------------------------- */
static void getLocalValues(Vec & garray, Array<Real> & larray,
Array<Int> & lidx) {
PetscInt n = lidx.size();
Array<PetscInt> global_idx(n);
ISLocalToGlobalMapping mapping;
PETSc_call(VecGetLocalToGlobalMapping, garray, &mapping);
PETSc_call(ISLocalToGlobalMappingApply, mapping, n, lidx.storage(),
global_idx.storage());
PETSc_call(VecAssemblyBegin, garray);
PETSc_call(VecAssemblyEnd, garray);
PETSc_call(VecGetValues, garray, n, global_idx.storage(), larray.storage());
}
/* -------------------------------------------------------------------------- */
void DOFManagerPETSc::getLumpedMatrixPerDOFs(const ID & dof_id,
const ID & lumped_mtx,
Array<Real> & lumped) {
auto & dof_data = this->getDOFData(dof_id);
auto & global_lumped = this->getLumpedMatrix(lumped_mtx);
getLocalValues(global_lumped, lumped, dof_data.local_equation_number);
}
/* -------------------------------------------------------------------------- */
void DOFManagerPETSc::getSolutionPerDOFs(const ID & dof_id,
Array<Real> & solution_array) {
auto & dof_data = this->getDOFData(dof_id);
getLocalValues(this->solution, solution_array,
dof_data.local_equation_number);
}
/* -------------------------------------------------------------------------- */
NonLinearSolver & DOFManagerPETSc::getNewNonLinearSolver(
const ID & id,
const NonLinearSolverType & type) {
ID non_linear_solver_id = this->id + ":nls:" + id;
std::unique_ptr<NonLinearSolver> nls = std::make_unique<NonLinearSolverPETSc>(
*this, type, non_linear_solver_id, this->memory_id);
return this->registerNonLinearSolver(non_linear_solver_id, nls);
}
/* -------------------------------------------------------------------------- */
TimeStepSolver &
DOFManagerPETSc::getNewTimeStepSolver(const ID & id,
const TimeStepSolverType & type,
NonLinearSolver & non_linear_solver) {
ID time_step_solver_id = this->id + ":tss:" + id;
std::unique_ptr<TimeStepSolver> tss = std::make_unique<TimeStepSolverDefault>(
*this, type, non_linear_solver, time_step_solver_id, this->memory_id);
return this->registerTimeStepSolver(time_step_solver_id, tss);
}
/* -------------------------------------------------------------------------- */
static bool dof_manager_is_registered[[gnu::unused]] =
DOFManagerFactory::getInstance().registerAllocator(
"petsc", [](Mesh & mesh, const ID & id,
const MemoryID & mem_id) -> std::unique_ptr<DOFManager> {
return std::make_unique<DOFManagerPETSc>(mesh, id, mem_id);
});
} // akantu
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