1 // Copyright (C) 2007-2016 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
20 #include "Topology.hxx"
21 #include "BlockTopology.hxx"
22 #include "ComponentTopology.hxx"
23 #include "ExplicitCoincidentDEC.hxx"
24 #include "StructuredCoincidentDEC.hxx"
25 #include "CommInterface.hxx"
26 #include "ProcessorGroup.hxx"
27 #include "MPIProcessorGroup.hxx"
28 #include "ParaFIELD.hxx"
29 #include "ParaMESH.hxx"
30 #include "InterpKernelUtilities.hxx"
31 #include "InterpolationMatrix.hxx"
41 This class encapsulates parallel fields.
43 It gathers a \ref fields "MEDCouplingField" with some extra information related to the parallel
46 It is most conveniently created by giving a pointer to a MEDCouplingFieldDouble
47 object and a ProcessorGroup.
48 By default, a ParaFIELD object will be constructed with all field components
49 located on the same processors. In some specific cases, it might be necessary to scatter components over
50 several processors. In this case, the constructor using a ComponentTopology is required.
56 \brief Constructing a \c ParaFIELD from a \c ParaMESH and a \c ComponentTopology.
58 This constructor creates an empty field based on the ParaMESH description
59 and the partitioning of components described in \a component_topology.
60 It takes ownership over the \c _field object that it creates.
62 Here come the three ComponentTopology constructors :
64 ComponentTopology c; // one component in the field
65 ComponentTopology c(6); //six components, all of them on the same processor
66 ComponentTopology c(6, proc_group); // six components, evenly distributed over the processors of procgroup
70 ParaFIELD::ParaFIELD(TypeOfField type, TypeOfTimeDiscretization td, ParaMESH* para_support, const ComponentTopology& component_topology)
72 _component_topology(component_topology),_topology(0),_own_support(false),
73 _support(para_support)
75 if (para_support->isStructured() || (para_support->getTopology()->getProcGroup()->size()==1 && component_topology.nbBlocks()!=1))
77 const BlockTopology* source_topo = dynamic_cast<const BlockTopology*>(para_support->getTopology());
78 _topology=new BlockTopology(*source_topo,component_topology);
82 if (component_topology.nbBlocks()!=1 && para_support->getTopology()->getProcGroup()->size()!=1)
83 throw INTERP_KERNEL::Exception(LOCALIZED("ParaFIELD constructor : Unstructured Support not taken into account with component topology yet"));
86 const BlockTopology* source_topo=dynamic_cast<const BlockTopology*> (para_support->getTopology());
87 int nb_local_comp=component_topology.nbLocalComponents();
88 _topology=new BlockTopology(*source_topo,nb_local_comp);
91 int nb_components = component_topology.nbLocalComponents();
94 _field=MEDCouplingFieldDouble::New(type,td);
95 _field->setMesh(_support->getCellMesh());
96 DataArrayDouble *array=DataArrayDouble::New();
97 array->alloc(_field->getNumberOfTuples(),nb_components);
98 _field->setArray(array);
103 _field->setName("Default ParaFIELD name");
104 _field->setDescription("Default ParaFIELD description");
107 /*! \brief Constructor creating the ParaFIELD
108 from a given FIELD and a processor group.
110 This constructor supposes that support underlying \a subdomain_field has no ParaMESH
111 attached and it therefore recreates one. It therefore takes ownership over _support. The component topology associated with the field is a basic one (all components on the same processor).
113 ParaFIELD::ParaFIELD(MEDCouplingFieldDouble* subdomain_field, ParaMESH *sup, const ProcessorGroup& proc_group):
114 _field(subdomain_field),
115 _component_topology(ComponentTopology(_field->getNumberOfComponents())),_topology(0),_own_support(false),
120 const BlockTopology* source_topo=dynamic_cast<const BlockTopology*> (_support->getTopology());
121 _topology=new BlockTopology(*source_topo,_component_topology.nbLocalComponents());
124 ParaFIELD::~ParaFIELD()
133 void ParaFIELD::synchronizeTarget(ParaFIELD* source_field)
135 DisjointDEC* data_channel;
136 if (dynamic_cast<BlockTopology*>(_topology)!=0)
138 data_channel=new StructuredCoincidentDEC;
142 data_channel=new ExplicitCoincidentDEC;
144 data_channel->attachLocalField(this);
145 data_channel->synchronize();
146 data_channel->prepareTargetDE();
147 data_channel->recvData();
152 void ParaFIELD::synchronizeSource(ParaFIELD* target_field)
154 DisjointDEC* data_channel;
155 if (dynamic_cast<BlockTopology*>(_topology)!=0)
157 data_channel=new StructuredCoincidentDEC;
161 data_channel=new ExplicitCoincidentDEC;
163 data_channel->attachLocalField(this);
164 data_channel->synchronize();
165 data_channel->prepareSourceDE();
166 data_channel->sendData();
172 * This method returns, if it exists, an array with only one component and as many as tuples as _field has.
173 * This array gives for every element on which this->_field lies, its global number, if this->_field is nodal.
174 * For example if _field is a nodal field : returned array will be the nodal global numbers.
175 * The content of this method is used to inform Working side to accumulate data received by lazy side.
177 DataArrayInt* ParaFIELD::returnCumulativeGlobalNumbering() const
181 TypeOfField type=_field->getTypeOfField();
187 return _support->getGlobalNumberingNodeDA();
193 DataArrayInt* ParaFIELD::returnGlobalNumbering() const
197 TypeOfField type=_field->getTypeOfField();
201 return _support->getGlobalNumberingCellDA();
203 return _support->getGlobalNumberingNodeDA();
209 int ParaFIELD::nbComponents() const
211 return _component_topology.nbComponents();
215 /*! This method retrieves the integral of component \a icomp
216 over the all domain. */
217 double ParaFIELD::getVolumeIntegral(int icomp, bool isWAbs) const
219 CommInterface comm_interface = _topology->getProcGroup()->getCommInterface();
220 double integral=_field->integral(icomp,isWAbs);
222 const MPI_Comm* comm = (dynamic_cast<const MPIProcessorGroup*>(_topology->getProcGroup()))->getComm();
223 comm_interface.allReduce(&integral, &total, 1, MPI_DOUBLE, MPI_SUM, *comm);