1 // Copyright (C) 2007-2020 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()
74 if (_interpolation_matrix !=0)
75 delete _interpolation_matrix;
79 \brief Synchronization process for exchanging topologies.
81 This method prepares all the structures necessary for sending data from a processor group to the other. It uses the mesh
82 underlying the fields that have been set with attachLocalField method.
83 It works in four steps :
84 -# Bounding boxes are computed for each sub-domain,
85 -# The lazy side mesh parts that are likely to intersect the working side local processor are sent to the working side,
86 -# The working side calls the interpolation kernel to compute the intersection between local and imported mesh.
87 -# The lazy side is updated so that it knows the structure of the data that will be sent by
88 the working side during a \a sendData() call.
91 void InterpKernelDEC::synchronize()
95 delete _interpolation_matrix;
96 _interpolation_matrix = new InterpolationMatrix (_local_field, *_source_group,*_target_group,*this,*this);
98 //setting up the communication DEC on both sides
99 if (_source_group->containsMyRank())
101 //locate the distant meshes
102 ElementLocator locator(*_local_field, *_target_group, *_source_group);
103 //transferring option from InterpKernelDEC to ElementLocator
104 locator.copyOptions(*this);
105 MEDCouplingPointSet* distant_mesh=0;
106 mcIdType* distant_ids=0;
107 std::string distantMeth;
108 for (int i=0; i<_target_group->size(); i++)
110 // int idistant_proc = (i+_source_group->myRank())%_target_group->size();
113 //gathers pieces of the target meshes that can intersect the local mesh
114 locator.exchangeMesh(idistant_proc,distant_mesh,distant_ids);
115 if (distant_mesh !=0)
117 locator.exchangeMethod(_method,idistant_proc,distantMeth);
118 //adds the contribution of the distant mesh on the local one
119 int idistant_proc_in_union=_union_group->translateRank(_target_group,idistant_proc);
120 //std::cout <<"add contribution from proc "<<idistant_proc_in_union<<" to proc "<<_union_group->myRank()<<std::endl;
121 _interpolation_matrix->addContribution(*distant_mesh,idistant_proc_in_union,distant_ids,_method,distantMeth);
122 distant_mesh->decrRef();
123 delete [] distant_ids;
128 _interpolation_matrix->finishContributionW(locator);
131 if (_target_group->containsMyRank())
133 ElementLocator locator(*_local_field, *_source_group, *_target_group);
134 //transferring option from InterpKernelDEC to ElementLocator
135 locator.copyOptions(*this);
136 MEDCouplingPointSet* distant_mesh=0;
137 mcIdType* distant_ids=0;
138 for (int i=0; i<_source_group->size(); i++)
140 // int idistant_proc = (i+_target_group->myRank())%_source_group->size();
142 //gathers pieces of the target meshes that can intersect the local mesh
143 locator.exchangeMesh(idistant_proc,distant_mesh,distant_ids);
144 //std::cout << " Data sent from "<<_union_group->myRank()<<" to source proc "<< idistant_proc<<std::endl;
147 std::string distantMeth;
148 locator.exchangeMethod(_method,idistant_proc,distantMeth);
149 distant_mesh->decrRef();
150 delete [] distant_ids;
155 _interpolation_matrix->finishContributionL(locator);
157 _interpolation_matrix->prepare();
162 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.
164 void InterpKernelDEC::recvData()
166 if (_source_group->containsMyRank())
167 _interpolation_matrix->transposeMultiply(*_local_field->getField());
168 else if (_target_group->containsMyRank())
170 _interpolation_matrix->multiply(*_local_field->getField());
171 if (getForcedRenormalization())
172 renormalizeTargetField(getMeasureAbsStatus());
178 Receives the data at time \a time in asynchronous mode. The value of the field
179 will be time-interpolated from the field values received.
180 \param time time at which the value is desired
182 void InterpKernelDEC::recvData( double time )
184 _interpolation_matrix->getAccessDEC()->setTime(time);
189 Sends the data whether the processor is on the working side or on the lazy side.
190 It must match a recvData() call on the other side.
192 void InterpKernelDEC::sendData()
194 if (_source_group->containsMyRank())
197 _interpolation_matrix->multiply(*_local_field->getField());
198 if (getForcedRenormalization())
199 renormalizeTargetField(getMeasureAbsStatus());
202 else if (_target_group->containsMyRank())
203 _interpolation_matrix->transposeMultiply(*_local_field->getField());
207 Sends the data available at time \a time in asynchronous mode.
208 \param time time at which the value is available
209 \param deltatime time interval between the value presently sent and the next one.
211 void InterpKernelDEC::sendData( double time , double deltatime )
213 _interpolation_matrix->getAccessDEC()->setTime(time,deltatime);