Abstract base class for domain decomposition. More...

Inheritance diagram for decompositionMethod:

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Collaboration diagram for decompositionMethod:

Public Member Functions
	decompositionMethod (const decompositionMethod &)=delete
	No copy construct. More...

void	operator= (const decompositionMethod &)=delete
	No copy assignment. More...

	TypeName ("decompositionMethod")
	Runtime type information. More...

	declareRunTimeSelectionTable (autoPtr, decompositionMethod, dictionary,(const dictionary &decompDict, const word &regionName),(decompDict, regionName))

	decompositionMethod (const dictionary &decompDict, const word &regionName="")
	Construct given the decomposition dictionary, optionally region-specific. More...

virtual	~decompositionMethod ()=default
	Destructor. More...

label	nDomains () const noexcept
	Number of domains. More...

virtual bool	geometric () const
	True if the method is purely geometric, often using cell centre points. More...

virtual bool	parallelAware () const =0
	Is method parallel aware? More...

virtual labelList	decompose (const pointField &points, const scalarField &pointWeights=scalarField::null()) const
	Return the wanted processor number for every coordinate, using uniform or specified point weights. More...

virtual labelList	decompose (const polyMesh &mesh, const pointField &points, const scalarField &pointWeights=scalarField::null()) const =0
	Return for every coordinate the wanted processor number, using uniform or specified point weights. More...

virtual labelList	decompose (const polyMesh &mesh, const labelList &cellToRegion, const pointField &regionPoints, const scalarField &regionWeights=scalarField::null()) const
	Return for every coordinate the wanted processor number. More...

virtual labelList	decompose (const CompactListList< label > &globalCellCells, const pointField &cc, const scalarField &cWeights=scalarField::null()) const =0
	Return for every coordinate the wanted processor number. More...

virtual labelList	decompose (const labelListList &globalCellCells, const pointField &cc, const scalarField &cWeights=scalarField::null()) const =0
	Return for every coordinate the wanted processor number. More...

void	setConstraints (const polyMesh &mesh, boolList &blockedFace, PtrList< labelList > &specifiedProcessorFaces, labelList &specifiedProcessor, List< labelPair > &explicitConnections) const
	Helper: extract constraints: More...

void	applyConstraints (const polyMesh &mesh, const boolList &blockedFace, const PtrList< labelList > &specifiedProcessorFaces, const labelList &specifiedProcessor, const List< labelPair > &explicitConnections, labelList &finalDecomp) const
	Helper: apply constraints to a decomposition. More...

virtual labelList	decompose (const polyMesh &mesh, const scalarField &cellWeights, const boolList &blockedFace, const PtrList< labelList > &specifiedProcessorFaces, const labelList &specifiedProcessor, const List< labelPair > &explicitConnections) const

labelList	decompose (const polyMesh &mesh, const scalarField &cWeights) const
	Decompose a mesh. More...

Static Public Member Functions
static label	nDomains (const dictionary &decompDict, const word &regionName="")
	Return region-specific or top-level `numberOfSubdomains` entry. More...

static const dictionary &	optionalRegionDict (const dictionary &decompDict, const word &regionName)
	Return an optional region-specific dictionary from "regions" sub-dictionary, or dictionary::null on failure. More...

static autoPtr< decompositionMethod >	New (const dictionary &decompDict, const word &regionName="")
	Return a reference to the selected decomposition method, optionally region-specific. More...

static void	calcCellCells (const polyMesh &mesh, const labelList &agglom, const label nLocalCoarse, const bool parallel, CompactListList< label > &cellCells)
	Determine (local or global) cellCells from mesh agglomeration. More...

static void	calcCellCells (const polyMesh &mesh, const labelList &agglom, const label nLocalCoarse, const bool parallel, CompactListList< label > &cellCells, CompactListList< scalar > &cellCellWeights)
	Determine (local or global) cellCells and face weights from mesh agglomeration. More...

Protected Types
enum	selectionType { DEFAULT = 0, EXACT = 1, MANDATORY = 2, NULL_DICT = 4 }
	Selection type when handling the coefficients dictionary. More...

Protected Member Functions
const dictionary &	findCoeffsDict (const word &coeffsName, int select=selectionType::DEFAULT) const
	Locate coeffsName dictionary or the fallback "coeffs" dictionary. More...

	decompositionMethod (const label numDomains)
	Construct with specified number of domains, no coefficients or constraints. More...

Static Protected Member Functions
static const dictionary &	findCoeffsDict (const dictionary &dict, const word &coeffsName, int select=selectionType::DEFAULT)
	Locate coeffsName dictionary or the fallback "coeffs" dictionary within an enclosing dictionary. More...

Protected Attributes
const dictionary &	decompDict_
	Top-level decomposition dictionary (eg, decomposeParDict) More...

const dictionary &	decompRegionDict_
	Region-specific decomposition dictionary information. More...

label	nDomains_
	Number of domains for the decomposition. More...

PtrList< decompositionConstraint >	constraints_
	Optional constraints. More...

Detailed Description

Abstract base class for domain decomposition.

Source files

Definition at line 47 of file decompositionMethod.H.

Member Enumeration Documentation

◆ selectionType

enum selectionType

protected

Selection type when handling the coefficients dictionary.

To be used as a bit-mask for findCoeffsDict

Enumerator
DEFAULT	Default request.
EXACT	No fallback to "coeffs" if main name not found.
MANDATORY	Fatal if dictionary could not be found.
NULL_DICT	On failure, return dictionary::null instead of the top-level enclosing dictionary.

Definition at line 74 of file decompositionMethod.H.

Constructor & Destructor Documentation

◆ decompositionMethod() [1/3]

decompositionMethod ( const label numDomains )

explicitprotected

Construct with specified number of domains, no coefficients or constraints.

Definition at line 328 of file decompositionMethod.C.

◆ decompositionMethod() [2/3]

decompositionMethod ( const decompositionMethod & )

delete

No copy construct.

◆ decompositionMethod() [3/3]

decompositionMethod	(	const dictionary &	decompDict,
		const word &	regionName = `""`
	)

explicit

Construct given the decomposition dictionary, optionally region-specific.

Definition at line 337 of file decompositionMethod.C.

◆ ~decompositionMethod()

virtual ~decompositionMethod ( )

virtualdefault

Destructor.

Member Function Documentation

◆ findCoeffsDict() [1/2]

const Foam::dictionary & findCoeffsDict	(	const dictionary &	dict,
		const word &	coeffsName,
		int	select = `selectionType::DEFAULT`
	)

staticprotected

Locate coeffsName dictionary or the fallback "coeffs" dictionary within an enclosing dictionary.

Parameters

select choose to include "coeffs" in the search, make failure a FatalError, return dictionary::null instead on failure.

Returns: the coefficients dictionary found. If nothing was found, return the enclosing dictionary or dictionary::null (depending on the select parameter).

Definition at line 248 of file decompositionMethod.C.

References Foam::abort(), Foam::cfindCoeffsDict(), dict, Foam::endl(), Foam::FatalIOError, dictionary::name(), dictionary::null, and Foam::BitOps::select().

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◆ findCoeffsDict() [2/2]

const Foam::dictionary & findCoeffsDict	(	const word &	coeffsName,
		int	select = `selectionType::DEFAULT`
	)		const

protected

Locate coeffsName dictionary or the fallback "coeffs" dictionary.

Searches both the region-specific decomposition dictionary and the top-level decomposition dictionary.

Parameters

select choose to include "coeffs" in the search, make failure a FatalError, return dictionary::null instead on failure.

Returns: the coefficients dictionary found. If nothing was found, return the top-level (non-region) dictionary or dictionary::null (depending on the select parameter).

Definition at line 283 of file decompositionMethod.C.

References Foam::abort(), Foam::cfindCoeffsDict(), Foam::endl(), Foam::FatalIOError, dictionary::null, and Foam::BitOps::select().

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◆ operator=()

void operator= ( const decompositionMethod & )

delete

No copy assignment.

◆ TypeName()

TypeName ( "decompositionMethod" )

Runtime type information.

◆ declareRunTimeSelectionTable()

declareRunTimeSelectionTable	(	autoPtr	,
		decompositionMethod	,
		dictionary	,
		(const dictionary &decompDict, const word &regionName)	,
		(decompDict, regionName)
	)

◆ nDomains() [1/2]

Foam::label nDomains	(	const dictionary &	decompDict,
		const word &	regionName = `""`
	)

static

Return region-specific or top-level numberOfSubdomains entry.

The region-specific version is found within the "regions" sub-dictionary.

Definition at line 76 of file decompositionMethod.C.

References Foam::endl(), Foam::nl, dictionary::readEntry(), dictionary::readIfPresent(), regionName, and WarningInFunction.

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◆ optionalRegionDict()

const Foam::dictionary & optionalRegionDict	(	const dictionary &	decompDict,
		const word &	regionName
	)

static

Return an optional region-specific dictionary from "regions" sub-dictionary, or dictionary::null on failure.

Definition at line 120 of file decompositionMethod.C.

References dictionary::findDict(), and regionName.

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◆ New()

Foam::autoPtr< Foam::decompositionMethod > New	(	const dictionary &	decompDict,
		const word &	regionName = `""`
	)

static

Return a reference to the selected decomposition method, optionally region-specific.

Definition at line 356 of file decompositionMethod.C.

References Foam::endl(), Foam::exit(), Foam::FatalIOError, FatalIOErrorInLookup, dictionary::get(), Foam::Info, dictionary::readIfPresent(), and regionName.

Referenced by decompositionModel::decomposer().

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◆ nDomains() [2/2]

label nDomains ( ) const

inlinenoexcept

Number of domains.

Definition at line 258 of file decompositionMethod.H.

References decompositionMethod::nDomains_.

◆ geometric()

virtual bool geometric ( ) const

inlinevirtual

True if the method is purely geometric, often using cell centre points.

Reimplemented in geomDecomp.

Definition at line 267 of file decompositionMethod.H.

◆ parallelAware()

virtual bool parallelAware ( ) const

pure virtual

Is method parallel aware?

(i.e. does it synchronize domains across proc boundaries)

Implemented in scotchDecomp, hierarchGeomDecomp, kahipDecomp, metisDecomp, multiLevelDecomp, simpleGeomDecomp, ptscotchDecomp, randomDecomp, manualDecomp, structuredDecomp, and noDecomp.

◆ decompose() [1/7]

Foam::labelList decompose	(	const pointField &	points,
		const scalarField &	pointWeights = `scalarField::null()`
	)		const

virtual

Return the wanted processor number for every coordinate, using uniform or specified point weights.

Reimplemented in hierarchGeomDecomp, geomDecomp, simpleGeomDecomp, randomDecomp, and noDecomp.

Definition at line 941 of file decompositionMethod.C.

References NotImplemented.

Referenced by meshRefinement::balance().

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◆ decompose() [2/7]

virtual labelList decompose	(	const polyMesh &	mesh,
		const pointField &	points,
		const scalarField &	pointWeights = `scalarField::null()`
	)		const

pure virtual

Return for every coordinate the wanted processor number, using uniform or specified point weights.

Use the mesh connectivity (if needed)

Implemented in scotchDecomp, hierarchGeomDecomp, multiLevelDecomp, simpleGeomDecomp, ptscotchDecomp, metisLikeDecomp, randomDecomp, manualDecomp, noDecomp, and structuredDecomp.

◆ decompose() [3/7]

Foam::labelList decompose	(	const polyMesh &	mesh,
		const labelList &	cellToRegion,
		const pointField &	regionPoints,
		const scalarField &	regionWeights = `scalarField::null()`
	)		const

virtual

Return for every coordinate the wanted processor number.

Gets passed agglomeration map (from fine to coarse cells) and coarse cell location. Can be overridden by decomposers that provide this functionality natively. Coarse cells are local to the processor (if in parallel). If you want to have coarse cells spanning processors use the globalCellCells instead.

Reimplemented in scotchDecomp, ptscotchDecomp, and metisLikeDecomp.

Definition at line 396 of file decompositionMethod.C.

References globalMeshData::calcCellCells(), mesh, and UList< T >::size().

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◆ decompose() [4/7]

virtual labelList decompose	(	const CompactListList< label > &	globalCellCells,
		const pointField &	cc,
		const scalarField &	cWeights = `scalarField::null()`
	)		const

pure virtual

Return for every coordinate the wanted processor number.

The connectivity is equal to mesh.cellCells() except for

in parallel the cell numbers are global cell numbers (starting from 0 at processor0 and then incrementing all through the processors)
the connections are across coupled patches

Implemented in scotchDecomp, hierarchGeomDecomp, metisLikeDecomp, ptscotchDecomp, multiLevelDecomp, simpleGeomDecomp, randomDecomp, manualDecomp, noDecomp, and structuredDecomp.

◆ decompose() [5/7]

virtual labelList decompose	(	const labelListList &	globalCellCells,
		const pointField &	cc,
		const scalarField &	cWeights = `scalarField::null()`
	)		const

pure virtual

Return for every coordinate the wanted processor number.

The connectivity is equal to mesh.cellCells() except for

in parallel the cell numbers are global cell numbers (starting from 0 at processor0 and then incrementing all through the processors)
the connections are across coupled patches

Implemented in scotchDecomp, hierarchGeomDecomp, metisLikeDecomp, ptscotchDecomp, multiLevelDecomp, simpleGeomDecomp, randomDecomp, manualDecomp, structuredDecomp, and noDecomp.

◆ setConstraints()

void setConstraints	(	const polyMesh &	mesh,
		boolList &	blockedFace,
		PtrList< labelList > &	specifiedProcessorFaces,
		labelList &	specifiedProcessor,
		List< labelPair > &	explicitConnections
	)		const

Helper: extract constraints:

blockedface: existing faces where owner and neighbour on same proc explicitConnections: sets of boundary faces ,, ,, specifiedProcessorFaces: groups of faces with all cells on same processor.

Definition at line 833 of file decompositionMethod.C.

References PtrList< T >::clear(), List< T >::clear(), mesh, primitiveMesh::nFaces(), and List< T >::resize_nocopy().

Referenced by meshRefinement::balance().

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◆ applyConstraints()

void applyConstraints	(	const polyMesh &	mesh,
		const boolList &	blockedFace,
		const PtrList< labelList > &	specifiedProcessorFaces,
		const labelList &	specifiedProcessor,
		const List< labelPair > &	explicitConnections,
		labelList &	finalDecomp
	)		const

Helper: apply constraints to a decomposition.

This gives constraints opportunity to modify decomposition in case the native decomposition method has not obeyed all constraints

Definition at line 862 of file decompositionMethod.C.

References mesh.

◆ decompose() [6/7]

Foam::labelList decompose	(	const polyMesh &	mesh,
		const scalarField &	cellWeights,
		const boolList &	blockedFace,
		const PtrList< labelList > &	specifiedProcessorFaces,
		const labelList &	specifiedProcessor,
		const List< labelPair > &	explicitConnections
	)		const

virtual

Parameters

blockedFace Whether owner and neighbour should be on same processor

(takes priority over explicitConnections)

Parameters

specifiedProcessorFaces Whether whole sets of faces (and point neighbours) need to be kept

on single processor

Parameters

explicitConnections Additional connections between boundary faces

Definition at line 476 of file decompositionMethod.C.

References Foam::BitOps::all(), polyMesh::boundaryMesh(), primitiveMesh::cellCentres(), Foam::BitOps::count(), UList< T >::data(), Foam::ensightOutput::debug, UList< T >::empty(), Foam::endl(), Foam::exit(), f(), primitiveMesh::faceCentres(), polyMesh::faceNeighbour(), polyMesh::faceOwner(), polyMesh::faces(), Foam::FatalError, FatalErrorInFunction, forAll, polyMesh::globalData(), Foam::Info, primitiveMesh::isInternalFace(), Foam::max(), mesh, primitiveMesh::nCells(), primitiveMesh::nFaces(), primitiveMesh::nInternalFaces(), Foam::nl, regionSplit::nLocalRegions(), globalMeshData::nTotalCells(), UPstream::parRun(), patches, pFaces, primitiveMesh::pointFaces(), pp(), Foam::reduce(), Foam::returnReduce(), Foam::returnReduceOr(), UList< T >::size(), syncTools::swapBoundaryCellList(), and Foam::Zero.

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◆ decompose() [7/7]

Foam::labelList decompose	(	const polyMesh &	mesh,
		const scalarField &	cWeights
	)		const

Decompose a mesh.

Apply all constraints from decomposeParDict ('preserveFaceZones' etc). Calls either

no constraints, empty weights: decompose(mesh, cellCentres())
no constraints, set weights: decompose(mesh, cellCentres(), cellWeights)
valid constraints: decompose(mesh, cellToRegion, regionPoints, regionWeights)

Definition at line 887 of file decompositionMethod.C.

References mesh.

◆ calcCellCells() [1/2]

void calcCellCells	(	const polyMesh &	mesh,
		const labelList &	agglom,
		const label	nLocalCoarse,
		const bool	parallel,
		CompactListList< label > &	cellCells
	)

static

Determine (local or global) cellCells from mesh agglomeration.

Agglomeration is local to the processor. local : connections are in local indices. Coupled across cyclics but not processor patches. global : connections are in global indices. Coupled across cyclics and processor patches.

Parameters

parallel Use global cell ids in parallel

Definition at line 430 of file decompositionMethod.C.

References globalMeshData::calcCellCells(), and mesh.

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◆ calcCellCells() [2/2]

void calcCellCells	(	const polyMesh &	mesh,
		const labelList &	agglom,
		const label	nLocalCoarse,
		const bool	parallel,
		CompactListList< label > &	cellCells,
		CompactListList< scalar > &	cellCellWeights
	)

static

Determine (local or global) cellCells and face weights from mesh agglomeration.

Uses mag of faceArea as weights

Parameters

parallel Use global cell ids in parallel

Definition at line 450 of file decompositionMethod.C.

References globalMeshData::calcCellCells(), and mesh.

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Member Data Documentation

◆ decompDict_

const dictionary& decompDict_

protected

Top-level decomposition dictionary (eg, decomposeParDict)

Definition at line 89 of file decompositionMethod.H.

◆ decompRegionDict_

const dictionary& decompRegionDict_

protected

Region-specific decomposition dictionary information.

Definition at line 94 of file decompositionMethod.H.

◆ nDomains_

label nDomains_

protected

Number of domains for the decomposition.

Definition at line 99 of file decompositionMethod.H.

Referenced by decompositionMethod::nDomains().

◆ constraints_

PtrList<decompositionConstraint> constraints_

protected

Optional constraints.

Definition at line 104 of file decompositionMethod.H.

The documentation for this class was generated from the following files:

src/parallel/decompose/decompositionMethods/decompositionMethod/decompositionMethod.H
src/parallel/decompose/decompositionMethods/decompositionMethod/decompositionMethod.C

Public Member Functions

Static Public Member Functions

Protected Types

Protected Member Functions

Static Protected Member Functions

Protected Attributes

Detailed Description

Member Enumeration Documentation

◆ selectionType

Constructor & Destructor Documentation

◆ decompositionMethod() [1/3]

◆ decompositionMethod() [2/3]

◆ decompositionMethod() [3/3]

◆ ~decompositionMethod()

Member Function Documentation

◆ findCoeffsDict() [1/2]

◆ findCoeffsDict() [2/2]

◆ operator=()

◆ TypeName()

◆ declareRunTimeSelectionTable()

◆ nDomains() [1/2]

◆ optionalRegionDict()

◆ New()

◆ nDomains() [2/2]

◆ geometric()

◆ parallelAware()

◆ decompose() [1/7]

◆ decompose() [2/7]

◆ decompose() [3/7]

◆ decompose() [4/7]

◆ decompose() [5/7]

◆ setConstraints()

◆ applyConstraints()

◆ decompose() [6/7]

◆ decompose() [7/7]

◆ calcCellCells() [1/2]

◆ calcCellCells() [2/2]

Member Data Documentation

◆ decompDict_

◆ decompRegionDict_

◆ nDomains_

◆ constraints_