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mesh_utils_distribution.cc
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Thu, Dec 12, 13:03

mesh_utils_distribution.cc
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/**
* Copyright (©) 2016-2023 EPFL (Ecole Polytechnique Fédérale de Lausanne)
* Laboratory (LSMS - Laboratoire de Simulation en Mécanique des Solides)
*
* This file is part of Akantu
*
* 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 "mesh_utils_distribution.hh"
#include "element_info_per_processor.hh"
#include "element_synchronizer.hh"
#include "mesh.hh"
#include "mesh_accessor.hh"
#include "mesh_partition.hh"
#include "mesh_utils.hh"
#include "node_info_per_processor.hh"
#include "node_synchronizer.hh"
/* -------------------------------------------------------------------------- */
namespace akantu {
namespace MeshUtilsDistribution {
/* ------------------------------------------------------------------------ */
void distributeMeshCentralized(Mesh & mesh, Int /*unused*/,
const MeshPartition & partition) {
MeshAccessor mesh_accessor(mesh);
auto & element_synchronizer = mesh_accessor.getElementSynchronizer();
auto & node_synchronizer = mesh_accessor.getNodeSynchronizer();
const auto & comm = element_synchronizer.getCommunicator();
auto nb_proc = comm.getNbProc();
auto my_rank = comm.whoAmI();
mesh_accessor.setNbGlobalNodes(mesh.getNbNodes());
auto & gids = mesh_accessor.getNodesGlobalIds();
if (nb_proc == 1) {
return;
}
gids.resize(0);
mesh.synchronizeGroupNames();
AKANTU_DEBUG_ASSERT(
partition.getNbPartition() == nb_proc,
"The number of partition does not match the number of processors: "
<< partition.getNbPartition() << " != " << nb_proc);
/**
* connectivity and communications scheme construction
*/
Int count = 0;
/* --- MAIN LOOP ON TYPES --- */
for (auto && type :
mesh.elementTypes(_all_dimensions, _not_ghost, _ek_not_defined)) {
/// \todo change this ugly way to avoid a problem if an element
/// type is present in the mesh but not in the partitions
try {
auto && partiton [[maybe_unused]] =
partition.getPartition(type, _not_ghost);
} catch (...) {
continue;
}
MasterElementInfoPerProc proc_infos(element_synchronizer, count, my_rank,
type, partition);
proc_infos.synchronize();
++count;
}
{ /// Ending the synchronization of elements by sending a stop message
MasterElementInfoPerProc proc_infos(element_synchronizer, count, my_rank,
_not_defined, partition);
proc_infos.synchronize();
++count;
}
/**
* Nodes synchronization
*/
MasterNodeInfoPerProc node_proc_infos(node_synchronizer, count, my_rank);
node_proc_infos.synchronize();
MeshUtils::fillElementToSubElementsData(mesh);
mesh_accessor.setDistributed();
AKANTU_DEBUG_OUT();
}
/* ------------------------------------------------------------------------ */
void distributeMeshCentralized(Mesh & mesh, Int root) {
MeshAccessor mesh_accessor(mesh);
auto & element_synchronizer = mesh_accessor.getElementSynchronizer();
auto & node_synchronizer = mesh_accessor.getNodeSynchronizer();
const auto & comm = element_synchronizer.getCommunicator();
auto nb_proc = comm.getNbProc();
mesh_accessor.getNodesGlobalIds().resize(0);
if (nb_proc == 1) {
return;
}
mesh.synchronizeGroupNames();
/**
* connectivity and communications scheme construction on distant
* processors
*/
Int count = 0;
bool need_synchronize = true;
do {
/* --------<<<<-SIZE--------------------------------------------------- */
SlaveElementInfoPerProc proc_infos(element_synchronizer, count, root);
need_synchronize = proc_infos.synchronize();
++count;
} while (need_synchronize);
/**
* Nodes synchronization
*/
SlaveNodeInfoPerProc node_proc_infos(node_synchronizer, count, root);
node_proc_infos.synchronize();
MeshUtils::fillElementToSubElementsData(mesh);
mesh_accessor.setDistributed();
}
} // namespace MeshUtilsDistribution
} // namespace akantu

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