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element_info_per_processor.cc
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Sun, Nov 3, 21:09

element_info_per_processor.cc
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/**
* @file element_info_per_processor.cc
*
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date creation: Wed Mar 16 2016
* @date last modification: Fri Jul 24 2020
*
* @brief Helper class to distribute a mesh
*
*
* @section LICENSE
*
* Copyright (©) 2016-2021 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 "element_info_per_processor.hh"
#include "communicator.hh"
#include "element_synchronizer.hh"
/* -------------------------------------------------------------------------- */
#include <algorithm>
#include <iostream>
#include <map>
/* -------------------------------------------------------------------------- */
namespace akantu {
/* -------------------------------------------------------------------------- */
ElementInfoPerProc::ElementInfoPerProc(ElementSynchronizer & synchronizer,
UInt message_cnt, UInt root,
ElementType type)
: MeshAccessor(synchronizer.getMesh()), synchronizer(synchronizer),
rank(synchronizer.getCommunicator().whoAmI()),
nb_proc(synchronizer.getCommunicator().getNbProc()), root(root),
type(type), message_count(message_cnt), mesh(synchronizer.getMesh()),
comm(synchronizer.getCommunicator()) {}
/* -------------------------------------------------------------------------- */
bool ElementInfoPerProc::synchronize() {
auto need_synchronize = needSynchronize();
if (need_synchronize) {
synchronizeConnectivities();
synchronizePartitions();
synchronizeTags();
synchronizeGroups();
}
return need_synchronize;
}
/* -------------------------------------------------------------------------- */
void ElementInfoPerProc::fillCommunicationScheme(
const Array<UInt> & partition) {
AKANTU_DEBUG_IN();
Element element;
element.type = this->type;
auto & communications = this->synchronizer.getCommunications();
auto part = partition.begin();
std::map<UInt, Array<Element>> send_array_per_proc;
for (UInt lel = 0; lel < nb_local_element; ++lel) {
UInt nb_send = *part;
++part;
element.element = lel;
element.ghost_type = _not_ghost;
for (UInt p = 0; p < nb_send; ++p, ++part) {
UInt proc = *part;
AKANTU_DEBUG(dblAccessory,
"Must send : " << element << " to proc " << proc);
send_array_per_proc[proc].push_back(element);
}
}
for (auto & send_schemes : send_array_per_proc) {
if (send_schemes.second.empty()) {
continue;
}
auto & scheme = communications.createSendScheme(send_schemes.first);
scheme.append(send_schemes.second);
}
std::map<UInt, Array<Element>> recv_array_per_proc;
for (UInt gel = 0; gel < nb_ghost_element; ++gel, ++part) {
UInt proc = *part;
element.element = gel;
element.ghost_type = _ghost;
AKANTU_DEBUG(dblAccessory,
"Must recv : " << element << " from proc " << proc);
recv_array_per_proc[proc].push_back(element);
}
for (auto & recv_schemes : recv_array_per_proc) {
if (recv_schemes.second.empty()) {
continue;
}
auto & scheme = communications.createRecvScheme(recv_schemes.first);
scheme.append(recv_schemes.second);
}
AKANTU_DEBUG_OUT();
}
/* -------------------------------------------------------------------------- */
} // namespace akantu

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