1 // Copyright (C) 2007-2021 CEA/DEN, EDF R&D
3 // This library is free software; you can redistribute it and/or
4 // modify it under the terms of the GNU Lesser General Public
5 // License as published by the Free Software Foundation; either
6 // version 2.1 of the License, or (at your option) any later version.
8 // This library is distributed in the hope that it will be useful,
9 // but WITHOUT ANY WARRANTY; without even the implied warranty of
10 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11 // Lesser General Public License for more details.
13 // You should have received a copy of the GNU Lesser General Public
14 // License along with this library; if not, write to the Free Software
15 // Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
17 // See http://www.salome-platform.org/ or email : webmaster.salome@opencascade.com
21 #include "CommInterface.hxx"
22 #include "Topology.hxx"
23 #include "BlockTopology.hxx"
24 #include "ComponentTopology.hxx"
25 #include "ParaFIELD.hxx"
26 #include "MPIProcessorGroup.hxx"
27 #include "ParaMESH.hxx"
29 #include "InterpolationMatrix.hxx"
30 #include "InterpKernelDEC.hxx"
31 #include "ElementLocator.hxx"
35 InterpKernelDEC::InterpKernelDEC():
37 _interpolation_matrix(0)
42 This constructor creates an InterpKernelDEC which has \a source_group as a working side
43 and \a target_group as an idle side. All the processors will actually participate, but intersection computations will be performed on the working side during the \a synchronize() phase.
44 The constructor must be called synchronously on all processors of both processor groups.
45 The source group and target group MUST form a partition of all the procs within the communicator passed as 'world_comm'
46 when building the group.
48 \param source_group working side ProcessorGroup
49 \param target_group lazy side ProcessorGroup
52 InterpKernelDEC::InterpKernelDEC(ProcessorGroup& source_group, ProcessorGroup& target_group):
53 DisjointDEC(source_group, target_group),
54 _interpolation_matrix(0)
61 * Creates an InterpKernelDEC from a set of source procs IDs and target group IDs.
62 * The difference with the ctor using groups is that the set of procs might not cover entirely MPI_COMM_WORLD
63 * (a sub-communicator holding the union of source and target procs is recreated internally).
65 InterpKernelDEC::InterpKernelDEC(const std::set<int>& src_ids, const std::set<int>& trg_ids,
66 const MPI_Comm& world_comm):
67 DisjointDEC(src_ids,trg_ids,world_comm),
68 _interpolation_matrix(0)
72 InterpKernelDEC::~InterpKernelDEC()
77 void InterpKernelDEC::release()
79 if (_interpolation_matrix != nullptr)
80 delete _interpolation_matrix;
81 _interpolation_matrix = nullptr;
82 DisjointDEC::cleanInstance();
87 \brief Synchronization process for exchanging topologies.
89 This method prepares all the structures necessary for sending data from a processor group to the other. It uses the mesh
90 underlying the fields that have been set with attachLocalField method.
91 It works in four steps :
92 -# Bounding boxes are computed for each sub-domain,
93 -# The lazy side mesh parts that are likely to intersect the working side local processor are sent to the working side,
94 -# The working side calls the interpolation kernel to compute the intersection between local and imported mesh.
95 -# The lazy side is updated so that it knows the structure of the data that will be sent by
96 the working side during a \a sendData() call.
99 void InterpKernelDEC::synchronize()
103 delete _interpolation_matrix;
104 _interpolation_matrix = new InterpolationMatrix (_local_field, *_source_group,*_target_group,*this,*this);
106 //setting up the communication DEC on both sides
107 if (_source_group->containsMyRank())
109 //locate the distant meshes
110 ElementLocator locator(*_local_field, *_target_group, *_source_group);
111 //transferring option from InterpKernelDEC to ElementLocator
112 locator.copyOptions(*this);
113 MEDCouplingPointSet* distant_mesh=0;
114 mcIdType* distant_ids=0;
115 std::string distantMeth;
116 for (int i=0; i<_target_group->size(); i++)
118 // int idistant_proc = (i+_source_group->myRank())%_target_group->size();
121 //gathers pieces of the target meshes that can intersect the local mesh
122 locator.exchangeMesh(idistant_proc,distant_mesh,distant_ids);
123 if (distant_mesh !=0)
125 locator.exchangeMethod(_method,idistant_proc,distantMeth);
126 //adds the contribution of the distant mesh on the local one
127 int idistant_proc_in_union=_union_group->translateRank(_target_group,idistant_proc);
128 //std::cout <<"add contribution from proc "<<idistant_proc_in_union<<" to proc "<<_union_group->myRank()<<std::endl;
129 _interpolation_matrix->addContribution(*distant_mesh,idistant_proc_in_union,distant_ids,_method,distantMeth);
130 distant_mesh->decrRef();
131 delete [] distant_ids;
136 _interpolation_matrix->finishContributionW(locator);
139 if (_target_group->containsMyRank())
141 ElementLocator locator(*_local_field, *_source_group, *_target_group);
142 //transferring option from InterpKernelDEC to ElementLocator
143 locator.copyOptions(*this);
144 MEDCouplingPointSet* distant_mesh=0;
145 mcIdType* distant_ids=0;
146 for (int i=0; i<_source_group->size(); i++)
148 // int idistant_proc = (i+_target_group->myRank())%_source_group->size();
150 //gathers pieces of the target meshes that can intersect the local mesh
151 locator.exchangeMesh(idistant_proc,distant_mesh,distant_ids);
152 //std::cout << " Data sent from "<<_union_group->myRank()<<" to source proc "<< idistant_proc<<std::endl;
155 std::string distantMeth;
156 locator.exchangeMethod(_method,idistant_proc,distantMeth);
157 distant_mesh->decrRef();
158 delete [] distant_ids;
163 _interpolation_matrix->finishContributionL(locator);
165 _interpolation_matrix->prepare();
170 Receives the data whether the processor is on the working side or on the lazy side. It must match a \a sendData() call on the other side.
172 void InterpKernelDEC::recvData()
174 if (_source_group->containsMyRank())
175 _interpolation_matrix->transposeMultiply(*_local_field->getField());
176 else if (_target_group->containsMyRank())
178 _interpolation_matrix->multiply(*_local_field->getField());
179 if (getForcedRenormalization())
180 renormalizeTargetField(getMeasureAbsStatus());
186 Receives the data at time \a time in asynchronous mode. The value of the field
187 will be time-interpolated from the field values received.
188 \param time time at which the value is desired
190 void InterpKernelDEC::recvData( double time )
192 _interpolation_matrix->getAccessDEC()->setTime(time);
197 Sends the data whether the processor is on the working side or on the lazy side.
198 It must match a recvData() call on the other side.
200 void InterpKernelDEC::sendData()
202 if (_source_group->containsMyRank())
205 _interpolation_matrix->multiply(*_local_field->getField());
206 if (getForcedRenormalization())
207 renormalizeTargetField(getMeasureAbsStatus());
210 else if (_target_group->containsMyRank())
211 _interpolation_matrix->transposeMultiply(*_local_field->getField());
215 Sends the data available at time \a time in asynchronous mode.
216 \param time time at which the value is available
217 \param deltatime time interval between the value presently sent and the next one.
219 void InterpKernelDEC::sendData( double time , double deltatime )
221 _interpolation_matrix->getAccessDEC()->setTime(time,deltatime);