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distributed_synchronizer.hh
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/**
* @file distributed_synchronizer.hh
*
* @author Guillaume Anciaux <guillaume.anciaux@epfl.ch>
* @author Nicolas Richart <nicolas.richart@epfl.ch>
*
* @date Thu Jun 16 16:36:52 2011
*
* @brief wrapper to the static communicator
*
* @section LICENSE
*
* Copyright (©) 2010-2011 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/>.
*
*/
/* -------------------------------------------------------------------------- */
#ifndef __AKANTU_DISTRIBUTED_SYNCHRONIZER_HH__
#define __AKANTU_DISTRIBUTED_SYNCHRONIZER_HH__
/* -------------------------------------------------------------------------- */
#include "aka_common.hh"
#include "aka_vector.hh"
#include "static_communicator.hh"
#include "synchronizer.hh"
#include "mesh.hh"
#include "mesh_partition.hh"
#include "communication_buffer.hh"
/* -------------------------------------------------------------------------- */
__BEGIN_AKANTU__
class DistributedSynchronizer : public Synchronizer, public MeshEventHandler {
/* ------------------------------------------------------------------------ */
/* Constructors/Destructors */
/* ------------------------------------------------------------------------ */
public:
DistributedSynchronizer(Mesh & mesh,
SynchronizerID id = "distributed_synchronizer",
MemoryID memory_id = 0);
public:
virtual ~DistributedSynchronizer();
/* ------------------------------------------------------------------------ */
/* Methods */
/* ------------------------------------------------------------------------ */
public:
/// get a mesh and a partition and create the local mesh and the associated
/// DistributedSynchronizer
static DistributedSynchronizer *
createDistributedSynchronizerMesh(Mesh & mesh,
const MeshPartition * partition,
UInt root = 0,
SynchronizerID id = "distributed_synchronizer",
MemoryID memory_id = 0);
/* ------------------------------------------------------------------------ */
/* Inherited from Synchronizer */
/* ------------------------------------------------------------------------ */
/// asynchronous synchronization of ghosts
void asynchronousSynchronize(DataAccessor & data_accessor,SynchronizationTag tag);
/// wait end of asynchronous synchronization of ghosts
void waitEndSynchronize(DataAccessor & data_accessor,SynchronizationTag tag);
/// build processor to element corrispondance
void buildPrankToElement(ByElementTypeUInt & prank_to_element);
virtual void printself(std::ostream & stream, int indent = 0) const;
/// mesh event handler onRemovedElement
virtual void onElementsRemoved(const Array<Element> & element_list,
const ByElementTypeUInt & new_numbering,
const RemovedElementsEvent & event);
protected:
/// fill the nodes type vector
void fillNodesType(Mesh & mesh);
void fillNodesType(const MeshData & mesh_data,
DynamicCommunicationBuffer * buffers,
const std::string & tag_name,
const ElementType & el_type,
const UInt * partition_num);
template<typename T>
void fillTagBufferTemplated(const MeshData & mesh_data,
DynamicCommunicationBuffer * buffers,
const std::string & tag_name,
const ElementType & el_type,
const UInt * partition_num,
const UInt * ghost_partition,
const UInt * ghost_partition_offset);
void fillTagBuffer(const MeshData & mesh_data,
DynamicCommunicationBuffer * buffers,
const std::string & tag_name,
const ElementType & el_type,
const UInt * partition_num,
const UInt * ghost_partition,
const UInt * ghost_partition_offset);
template<typename T, typename BufferType>
void populateMeshDataTemplated(MeshData & mesh_data,
BufferType & buffer,
const std::string & tag_name,
const ElementType & el_type,
UInt nb_component,
UInt nb_local_element,
UInt nb_ghost_element);
template <typename BufferType>
void populateMeshData(MeshData & mesh_data,
BufferType & buffer,
const std::string & tag_name,
const ElementType & el_type,
const MeshDataTypeCode & type_code,
UInt nb_component,
UInt nb_local_element,
UInt nb_ghost_element);
/// fill the communications array of a distributedSynchronizer based on a partition array
void fillCommunicationScheme(UInt * partition,
UInt nb_local_element,
UInt nb_ghost_element,
ElementType type);
/// compute buffer size for a given tag and data accessor
void computeBufferSize(DataAccessor & data_accessor, SynchronizationTag tag);
/* ------------------------------------------------------------------------ */
/* Accessors */
/* ------------------------------------------------------------------------ */
public:
/* ------------------------------------------------------------------------ */
/* Class Members */
/* ------------------------------------------------------------------------ */
private:
enum CommTags {
TAG_SIZES = 0,
TAG_CONNECTIVITY = 1,
TAG_DATA = 2,
TAG_PARTITIONS = 3,
TAG_NB_NODES = 4,
TAG_NODES = 5,
TAG_COORDINATES = 6,
TAG_NODES_TYPE = 7,
TAG_MESH_DATA = 8
};
protected:
/// reference to the underlying mesh
Mesh & mesh;
/// the static memory instance
StaticCommunicator * static_communicator;
class Communication {
public:
void resize(UInt size) {
send_buffer.resize(size);
recv_buffer.resize(size);
size_to_send .resize(size);
size_to_receive.resize(size);
}
public:
/// size of data to send to each processor
std::vector<UInt> size_to_send;
/// size of data to recv to each processor
std::vector<UInt> size_to_receive;
std::vector< CommunicationBuffer > send_buffer;
std::vector< CommunicationBuffer > recv_buffer;
std::vector<CommunicationRequest *> send_requests;
std::vector<CommunicationRequest *> recv_requests;
};
std::map<SynchronizationTag, Communication> communications;
/// list of element to send to proc p
Array<Element> * send_element;
/// list of element to receive from proc p
Array<Element> * recv_element;
UInt nb_proc;
UInt rank;
friend class FacetSynchronizer;
};
/* -------------------------------------------------------------------------- */
/* inline functions */
/* -------------------------------------------------------------------------- */
template<typename T>
void DistributedSynchronizer::fillTagBufferTemplated(const MeshData & mesh_data,
DynamicCommunicationBuffer * buffers,
const std::string & tag_name,
const ElementType & el_type,
const UInt * partition_num,
const UInt * ghost_partition,
const UInt * ghost_partition_offset) {
const Array<T> & data = mesh_data.getElementalDataArray<T>(tag_name, el_type);
// Not possible to use the iterator because it potentially triggers the creation of complex
// type templates (such as akantu::Vector< std::vector<Element> > which don't implement the right interface
// (e.g. operator<< in that case).
//typename Array<T>::template const_iterator< Vector<T> > data_it = data.begin(data.getNbComponent());
//typename Array<T>::template const_iterator< Vector<T> > data_end = data.end(data.getNbComponent());
const T * data_it = data.storage();
const T * data_end = data.storage() + data.getSize()*data.getNbComponent();
const UInt * part = partition_num;
/// copying the data, element by element
for (; data_it != data_end; ++part) {
for(UInt j(0); j < data.getNbComponent(); ++j, ++data_it) {
buffers[*part] << *data_it;
}
}
data_it = data.storage();
const UInt * offset = ghost_partition_offset;
/// copying the data for the ghost element
for (; data_it != data_end; data_it+=data.getNbComponent(), ++offset) {
for (UInt p = *offset; p < *(offset + 1); ++p) {
UInt proc = ghost_partition[p];
for(UInt j(0); j < data.getNbComponent(); ++j) {
buffers[proc] << data_it[j];
}
}
}
}
/* -------------------------------------------------------------------------- */
template <typename BufferType>
void DistributedSynchronizer::populateMeshData(MeshData & mesh_data,
BufferType & buffer,
const std::string & tag_name,
const ElementType & el_type,
const MeshDataTypeCode & type_code,
UInt nb_component,
UInt nb_local_element,
UInt nb_ghost_element) {
#define AKANTU_DISTRIBUTED_SYNHRONIZER_TAG_DATA(r, extra_param, elem) \
case BOOST_PP_TUPLE_ELEM(2, 0, elem) : { \
populateMeshDataTemplated<BOOST_PP_TUPLE_ELEM(2, 1, elem)>(mesh_data, buffer, tag_name, el_type, nb_component, nb_local_element, nb_ghost_element); \
break; \
} \
switch(type_code) {
BOOST_PP_SEQ_FOR_EACH(AKANTU_DISTRIBUTED_SYNHRONIZER_TAG_DATA, , AKANTU_MESH_DATA_TYPES)
default : AKANTU_DEBUG_ERROR("Could not determine the type of tag" << tag_name << "!"); break;
}
#undef AKANTU_DISTRIBUTED_SYNHRONIZER_TAG_DATA
}
/* -------------------------------------------------------------------------- */
template<typename T, typename BufferType>
void DistributedSynchronizer::populateMeshDataTemplated(MeshData & mesh_data,
BufferType & buffer,
const std::string & tag_name,
const ElementType & el_type,
UInt nb_component,
UInt nb_local_element,
UInt nb_ghost_element) {
if(nb_local_element != 0) {
mesh_data.registerElementalData<T>(tag_name);
Array<T> & data = mesh_data.getElementalDataArrayAlloc<T>(tag_name, el_type, _not_ghost, nb_component);
data.resize(nb_local_element);
/// unpacking the data, element by element
for (UInt i(0); i < nb_local_element; ++i) {
for(UInt j(0); j < nb_component; ++j) {
buffer >> data(i,j);
}
}
}
if(nb_ghost_element != 0) {
mesh_data.registerElementalData<T>(tag_name);
Array<T> & data_ghost = mesh_data.getElementalDataArrayAlloc<T>(tag_name, el_type, _ghost, nb_component);
data_ghost.resize(nb_ghost_element);
/// unpacking the ghost data, element by element
for (UInt j(0); j < nb_ghost_element; ++j) {
for(UInt k(0); k < nb_component; ++k) {
buffer >> data_ghost(j, k);
}
}
}
}
//#include "distributedSynchronizer_inline_impl.cc"
__END_AKANTU__
#endif /* __AKANTU_DISTRIBUTED_SYNCHRONIZER_HH__ */

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