-// Copyright (C) 2007-2019 CEA/DEN, EDF R&D
+// Copyright (C) 2007-2024 CEA, EDF
//
// This library is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
namespace MEDCoupling
{
- /*!
- \anchor StructuredCoincidentDEC-det
- \class StructuredCoincidentDEC
-
- This class aims at \ref interpolation "remapping fields" that have identical
- structured supports (=the same underlying mesh) but different parallel topologies
- (=different sub-domains in the structured mesh). It can be used to couple
- together multi-physics codes that operate on the same domain
- with different partitioning. This can be useful for example if one of
- the computation is much faster than the other. It can also be used
- to couple together codes that share an interface that was generated
- in the same manner (with identical global ids).
- Also, this \ref para-dec "DEC" can be used for fields that have component topologies,
- i.e., components that are scattered over several processors.
-
- The remapping between the two supports is based on identity of global
- ids, instead of geometrical considerations (as it is the case for
- \ref InterpKernelDEC-det "InterpKernelDEC").
- Therefore, beware that this \ref para-dec "DEC" can not be used
- for coincident meshes if they do *not* have the exact same numbering.
-
- With this %DEC no projection, and no interpolation of the field data is done, contrary
- to what happens in \ref InterpKernelDEC-det "InterpKernelDEC". It is just
- a matter of allocating the values from one side to the other, using directly the cell
- identifiers.
-
- As all the other DECs, its usage requires two phases :
- - a setup phase during which the topologies are exchanged so that
- the target side knows from which processors it should expect
- the data.
- - a send/recv phase during which the field data is actually transferred.
-
- This example illustrates the sending of a field with
- the \c StructuredCoincidentDEC :
- \code
- ...
- StructuredCoincidentDEC dec(groupA, groupB);
- dec.attachLocalField(field);
- dec.synchronize();
- if (groupA.containsMyRank())
- dec.recvData();
- else if (groupB.containsMyRank())
- dec.sendData();
- ...
- \endcode
-
- Creating a ParaFIELD to be attached to the %DEC is done in exactly the same way as for
- the other DECs, if only the partitioning of the support mesh differs.
- In the case where the
- fields have also different *component* topologies, creating the ParaFIELD
- requires some more effort. See the \ref para-over "parallelism" section for more details.
- */
-
-
- StructuredCoincidentDEC::StructuredCoincidentDEC():_topo_source(0),_topo_target(0),
- _send_counts(0),_recv_counts(0),
- _send_displs(0),_recv_displs(0),
- _recv_buffer(0),_send_buffer(0)
+ StructuredCoincidentDEC::StructuredCoincidentDEC():_topo_source(nullptr),_topo_target(nullptr),
+ _owns_topo_source(false), _owns_topo_target(false),
+ _send_counts(nullptr),_recv_counts(nullptr),
+ _send_displs(nullptr),_recv_displs(nullptr),
+ _recv_buffer(nullptr),_send_buffer(nullptr)
{
}
+ StructuredCoincidentDEC::StructuredCoincidentDEC(ProcessorGroup& local_group, ProcessorGroup& distant_group):
+ DisjointDEC(local_group,distant_group),
+ _topo_source(nullptr),_topo_target(nullptr),
+ _owns_topo_source(false), _owns_topo_target(false),
+ _send_counts(nullptr),_recv_counts(nullptr),
+ _send_displs(nullptr),_recv_displs(nullptr),
+ _recv_buffer(nullptr),_send_buffer(nullptr)
+ {
+ }
StructuredCoincidentDEC::~StructuredCoincidentDEC()
+ {
+ release();
+ }
+
+ /** Destructor involves MPI operations: make sure this is accessible from a proper
+ * method for Python wrapping.
+ */
+ void StructuredCoincidentDEC::release()
{
delete [] _send_buffer;
delete [] _recv_buffer;
- delete []_send_displs;
+ delete [] _send_displs;
delete [] _recv_displs;
delete [] _send_counts;
delete [] _recv_counts;
- if (! _source_group->containsMyRank())
+ _send_buffer = nullptr;
+ _recv_buffer = nullptr;
+ _send_displs = nullptr;
+ _recv_displs = nullptr;
+ _send_counts = nullptr;
+ _recv_counts = nullptr;
+
+ if (_owns_topo_source)
delete _topo_source;
- if(!_target_group->containsMyRank())
+ if (_owns_topo_target)
delete _topo_target;
- }
+ _topo_source = nullptr;
+ _topo_target = nullptr;
+ _owns_topo_source = false;
+ _owns_topo_target = false;
- StructuredCoincidentDEC::StructuredCoincidentDEC(ProcessorGroup& local_group, ProcessorGroup& distant_group):
- DisjointDEC(local_group,distant_group),
- _topo_source(0),_topo_target(0),
- _send_counts(0),_recv_counts(0),
- _send_displs(0),_recv_displs(0),
- _recv_buffer(0),_send_buffer(0)
- {
+ DisjointDEC::cleanInstance();
}
/*! Synchronization process for exchanging topologies
{
if (_source_group->containsMyRank())
_topo_source = dynamic_cast<BlockTopology*>(_local_field->getTopology());
+ else
+ _owns_topo_source = true; // _topo_source will be filled by broadcastTopology below
if (_target_group->containsMyRank())
_topo_target = dynamic_cast<BlockTopology*>(_local_field->getTopology());
+ else
+ _owns_topo_target = true; // _topo_target will be filled by broadcastTopology below
// Transmitting source topology to target code
+ MESSAGE ("Broadcast source topo ...");
broadcastTopology(_topo_source,1000);
+
// Transmitting target topology to source code
+ MESSAGE ("Broadcast target topo ...");
broadcastTopology(_topo_target,2000);
if (_topo_source->getNbElements() != _topo_target->getNbElements())
throw INTERP_KERNEL::Exception("Incompatible dimensions for target and source topologies");
-
}
/*! Creates the arrays necessary for the data transfer
MPIProcessorGroup* group=new MPIProcessorGroup(*_comm_interface);
- // The master proc creates a send buffer containing
- // a serialized topology
+ // The master proc creates a send buffer containing a serialized topology
int rank_master;
if (topo!=0 && topo->getProcGroup()->myRank()==0)
{
MESSAGE(" rank "<<group->myRank()<< " waiting ...");
_comm_interface->recv(&rank_master, 1,MPI_INT, MPI_ANY_SOURCE, tag+group->myRank(), *(group->getComm()),&status);
- MESSAGE(" rank "<<group->myRank()<< "received master rank"<<rank_master);
+ MESSAGE(" rank "<<group->myRank()<< " received master rank "<<rank_master);
}
// The topology is broadcasted to all processors in the group
_comm_interface->broadcast(&size, 1,MPI_ID_TYPE,rank_master,*(group->getComm()));
copy(serializer, serializer+size, buffer);
_comm_interface->broadcast(buffer,(int)size,MPI_ID_TYPE,rank_master,*(group->getComm()));
- // Processors which did not possess the source topology
- // unserialize it
-
+ // Processors which did not possess the source topology unserialize it
BlockTopology* topotemp=new BlockTopology();
topotemp->unserialize(buffer, *_comm_interface);
synchronizeTopology();
prepareTargetDE();
}
+ MESSAGE ("sync OK");
}
}
