Grid mesh partitioner. More...

Inheritance diagram for Arcane::SimpleGridMeshPartitioner:

Collaboration diagram for Arcane::SimpleGridMeshPartitioner:

Classes
class	GhostCellsBuilder
	Information about extra ghost cells. More...
class	GridInfo

Public Member Functions
	SimpleGridMeshPartitioner (const ServiceBuildInfo &sbi)
void	build () override
	Build-level construction of the service.
IPrimaryMesh *	primaryMesh () override
	Associated mesh.
void	partitionMesh (bool initial_partition) override
void	notifyEndPartition () override
	Notification when a re-partitioning finishes (after entity exchange).
void	setBoundingBox (Real3 min_val, Real3 max_val) override
	Positions the bounding box of our subdomain.
void	setPartIndex (Int32 i, Int32 j, Int32 k) override
	Index (i,j,k) of the part.
void	applyMeshPartitioning (IMesh *mesh) override
	Applies the repartitioning to the mesh mesh.
Public Member Functions inherited from Arcane::BasicService
	~BasicService () override
	Releases resources.
virtual ISubDomain *	subDomain ()
Public Member Functions inherited from Arcane::AbstractService
	~AbstractService () override
	Destructor.
IServiceInfo *	serviceInfo () const override
	Access to service information. See IServiceInfo for details.
IBase *	serviceParent () const override
	Access to the base interface of main Arcane objects.
IService *	serviceInterface () override
	Returns the low-level IService interface of the service.
Public Member Functions inherited from Arcane::TraceAccessor
	TraceAccessor (ITraceMng *m)
	Constructs an accessor via the trace manager m.
	TraceAccessor (const TraceAccessor &rhs)
	Copy constructor.
TraceAccessor &	operator= (const TraceAccessor &rhs)
	Copy assignment operator.
virtual	~TraceAccessor ()
	Frees resources.
ITraceMng *	traceMng () const
	Trace manager.
TraceMessage	info () const
	Flow for an information message.
TraceMessage	pinfo () const
	Flow for a parallel information message.
TraceMessage	info (char category) const
	Flow for an information message of a given category.
TraceMessage	pinfo (char category) const
	Flow for a parallel information message of a given category.
TraceMessage	info (bool v) const
	Flow for an information message.
TraceMessage	warning () const
	Flow for a warning message.
TraceMessage	pwarning () const
TraceMessage	error () const
	Flow for an error message.
TraceMessage	perror () const
TraceMessage	log () const
	Flow for a log message.
TraceMessage	plog () const
	Flow for a log message.
TraceMessage	logdate () const
	Flow for a log message preceded by the date.
TraceMessage	fatal () const
	Flow for a fatal error message.
TraceMessage	pfatal () const
	Flow for a parallel fatal error message.
TraceMessageDbg	debug (Trace::eDebugLevel=Trace::Medium) const
	Flow for a debug message.
Trace::eDebugLevel	configDbgLevel () const
	Debug level of the configuration file.
TraceMessage	info (Int32 verbose_level) const
	Flow for an information message of a given level.
TraceMessage	linfo () const
	Flow for an information message with the local information level of this instance.
TraceMessage	linfo (Int32 relative_level) const
	Flow for an information message with the local information level of this instance.
void	fatalMessage (const StandaloneTraceMessage &o) const
Public Member Functions inherited from Arcane::IService
virtual	~IService ()
	Releases resources.
Public Member Functions inherited from Arcane::MeshAccessor
	MeshAccessor (ISubDomain *sd)
	MeshAccessor (IMesh *mesh)
	MeshAccessor (const MeshHandle &mesh_handle)
Integer	nbCell () const
	Returns the number of cells in the mesh.
Integer	nbFace () const
	Returns the number of faces in the mesh.
Integer	nbEdge () const
	Returns the number of edges in the mesh.
Integer	nbNode () const
	Returns the number of nodes in the mesh.
VariableNodeReal3 &	nodesCoordinates () const
	Returns the coordinates of the mesh nodes.
NodeGroup	allNodes () const
	Returns the group containing all nodes.
EdgeGroup	allEdges () const
	Returns the group containing all edges.
FaceGroup	allFaces () const
	Returns the group containing all faces.
CellGroup	allCells () const
	Returns the group containing all cells.
FaceGroup	outerFaces () const
	Returns the group containing all boundary faces.
NodeGroup	ownNodes () const
	Returns the group containing all nodes specific to this domain.
CellGroup	ownCells () const
	Returns the group containing all cells specific to this domain.
FaceGroup	ownFaces () const
	Group containing all faces specific to this domain.
EdgeGroup	ownEdges () const
	Group containing all edges specific to this domain.
IMesh *	mesh () const
const MeshHandle &	meshHandle () const
Public Member Functions inherited from Arcane::CommonVariables
	CommonVariables (IModule *c)
	Constructs the references of the common variables for the module c.
	CommonVariables (IVariableMng *variable_mng)
	Constructs the references of the common variables for the manager variable_mng.
	CommonVariables (ISubDomain *sd)
	Constructs the references of the common variables for the subdomain sd.
virtual	~CommonVariables ()
	Releases resources.
Int32	globalIteration () const
	Current iteration number.
Real	globalTime () const
	Current time.
Real	globalOldTime () const
	Previous current time.
Real	globalFinalTime () const
	Final time of the simulation.
Real	globalDeltaT () const
	Current Delta T.
Real	globalCPUTime () const
	CPU time used (in seconds).
Real	globalOldCPUTime () const
	Previous CPU time used (in seconds).
Real	globalElapsedTime () const
	Clock time (elapsed) used (in seconds).
Real	globalOldElapsedTime () const
	Previous clock time (elapsed) used (in seconds).
Public Member Functions inherited from Arcane::IMeshPartitionerBase
virtual	~IMeshPartitionerBase ()=default
	Releases resources.

Private Member Functions
Int32	_findPart (RealConstArrayView coords, Real center)
	Returns the index in coords of the value immediately lower than position.
void	_addGhostCell (Int32 rank, Cell cell)
void	_buildGridInfo ()
void	_computeSpecificGhostLayer ()
void	_addCellToIntersectedParts (Cell cell, std::array< Int32, 3 > min_part, std::array< Int32, 3 > nb_part)

Private Attributes
Real3	m_min_box
Real3	m_max_box
std::array< Int32, 3 >	m_ijk_part
bool	m_is_bounding_box_set = false
bool	m_is_ijk_set = false
bool	m_is_verbose = false
GhostCellsBuilder *	m_ghost_cells_builder = nullptr
ScopedPtrT< GridInfo >	m_grid_info

Additional Inherited Members
Public Attributes inherited from Arcane::CommonVariables
VariableScalarInt32	m_global_iteration
	Current iteration.
VariableScalarReal	m_global_time
	Current time.
VariableScalarReal	m_global_deltat
	Global Delta T.
VariableScalarReal	m_global_old_time
	Time previous to the current time.
VariableScalarReal	m_global_old_deltat
	Delta T at the time previous to the global time.
VariableScalarReal	m_global_final_time
	Final time of the case.
VariableScalarReal	m_global_old_cpu_time
	Previous CPU time used (in seconds).
VariableScalarReal	m_global_cpu_time
	CPU time used (in seconds).
VariableScalarReal	m_global_old_elapsed_time
	Previous clock time used (in seconds).
VariableScalarReal	m_global_elapsed_time
	Clock time used (in seconds).
Protected Member Functions inherited from Arcane::BasicService
	BasicService (const ServiceBuildInfo &)
Protected Member Functions inherited from Arcane::AbstractService
	AbstractService (const ServiceBuildInfo &)
	Constructor from a ServiceBuildInfo.
Protected Member Functions inherited from Arcane::TraceAccessor
void	_setLocalVerboseLevel (Int32 v)
Int32	_localVerboseLevel () const
Protected Member Functions inherited from Arcane::IService
	IService ()
	Constructor.

Detailed Description

Grid mesh partitioner.

Definition at line 45 of file SimpleGridMeshPartitioner.cc.

Constructor & Destructor Documentation

◆ SimpleGridMeshPartitioner()

Arcane::SimpleGridMeshPartitioner::SimpleGridMeshPartitioner ( const ServiceBuildInfo & sbi )

explicit

Definition at line 159 of file SimpleGridMeshPartitioner.cc.

Member Function Documentation

◆ _addCellToIntersectedParts()

void Arcane::SimpleGridMeshPartitioner::_addCellToIntersectedParts	(	Cell	cell,
		std::array< Int32, 3 >	min_part,
		std::array< Int32, 3 >	nb_part )

private

Iterates over all parts that intersect the cell cell and sends this cell as a ghost cell.

Definition at line 352 of file SimpleGridMeshPartitioner.cc.

References Arcane::Item::owner().

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◆ _addGhostCell()

void Arcane::SimpleGridMeshPartitioner::_addGhostCell	(	Int32	rank,
		Cell	cell )

private

Definition at line 204 of file SimpleGridMeshPartitioner.cc.

◆ _buildGridInfo()

void Arcane::SimpleGridMeshPartitioner::_buildGridInfo ( )

private

Definition at line 213 of file SimpleGridMeshPartitioner.cc.

◆ _computeSpecificGhostLayer()

void Arcane::SimpleGridMeshPartitioner::_computeSpecificGhostLayer ( )

private

Definition at line 375 of file SimpleGridMeshPartitioner.cc.

◆ _findPart()

Int32 Arcane::SimpleGridMeshPartitioner::_findPart	(	RealConstArrayView	coords,
		Real	position )

private

Returns the index in coords of the value immediately lower than position.

The array coords must be sorted in ascending order. // TODO: use a dichotomy.

Definition at line 177 of file SimpleGridMeshPartitioner.cc.

References Arcane::TraceAccessor::info(), Arcane::math::isNearlyEqual(), and Arcane::ConstArrayView< T >::size().

Referenced by partitionMesh().

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◆ applyMeshPartitioning()

void Arcane::SimpleGridMeshPartitioner::applyMeshPartitioning ( IMesh * mesh )

overridevirtual

Applies the repartitioning to the mesh mesh.

The setPartIndex() and setBoundingBox() methods must have been called previously. This method can only be called once per instance.

The partitioning uses a specific algorithm for calculating ghost cells to ensure that every cell in mesh that intersects the part specified in setBoundingBox() will be in this subdomain, possibly as a ghost cell.

Implements Arcane::IGridMeshPartitioner.

Definition at line 456 of file SimpleGridMeshPartitioner.cc.

References ARCANE_FATAL, and Arcane::PtrT< T >::get().

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◆ build()

void Arcane::SimpleGridMeshPartitioner::build ( void )

inlineoverridevirtual

Build-level construction of the service.

This method is called right after the constructor.

Reimplemented from Arcane::AbstractService.

Definition at line 112 of file SimpleGridMeshPartitioner.cc.

◆ notifyEndPartition()

void Arcane::SimpleGridMeshPartitioner::notifyEndPartition ( )

inlineoverridevirtual

Notification when a re-partitioning finishes (after entity exchange).

Implements Arcane::IMeshPartitionerBase.

Definition at line 115 of file SimpleGridMeshPartitioner.cc.

◆ partitionMesh()

void Arcane::SimpleGridMeshPartitioner::partitionMesh ( bool initial_partition )

overridevirtual

Re-partitions the mesh mesh

This method changes the owners of the entities and fills the IItemFamily::itemsNewOwner() variable of each entity family of the mesh mesh with the number of the new owning subdomain.

Note: This method is reserved for Arcane developers. If a module wishes to perform a re-partitioning, it must call the method IMeshUtilities::partitionAndExchangeMeshWithReplication() which handles both the partitioning and the exchange of information and supports domain replication.

Implements Arcane::IMeshPartitionerBase.

Definition at line 289 of file SimpleGridMeshPartitioner.cc.

References _findPart(), ARCANE_FATAL, Arcane::IParallelMng::commSize(), ENUMERATE_, Arcane::IK_Cell, Arcane::TraceAccessor::info(), Arcane::ItemWithNodes::nbNode(), Arcane::ItemWithNodes::node(), Arcane::IMesh::toPrimaryMesh(), and Arcane::Item::uniqueId().

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