Metis domain decomposition. More...

#include <metisDecomp.H>

Inheritance diagram for metisDecomp:

Collaboration diagram for metisDecomp:

Public Member Functions
	metisDecomp (const metisDecomp &)=delete
	No copy construct.
void	operator= (const metisDecomp &)=delete
	No copy assignment.
	TypeName ("metis")
	Runtime type information.
	metisDecomp (const label numDomains)
	Construct with number of domains (no coefficients or constraints).
	metisDecomp (const dictionary &decompDict, const word &regionName="")
	Construct given decomposition dictionary and optional region name.
virtual	~metisDecomp ()=default
	Destructor.
virtual bool	parallelAware () const
	Knows about coupled boundaries.
Public Member Functions inherited from metisLikeDecomp
virtual	~metisLikeDecomp ()=default
	Destructor.
virtual labelList	decompose (const polyMesh &mesh, const pointField &points=pointField::null(), const scalarField &pointWeights=scalarField::null()) const
	Return for every coordinate the wanted processor number.
virtual labelList	decompose (const polyMesh &mesh, const labelList &agglom, const pointField &agglomPoints, const scalarField &agglomWeights=scalarField::null()) const
	Return for every coordinate the wanted processor number.
virtual labelList	decompose (const CompactListList< label > &globalCellCells, const pointField &cellCentres=pointField::null(), const scalarField &cellWeights=scalarField::null()) const
	Return for every coordinate the wanted processor number.
virtual labelList	decompose (const labelListList &globalCellCells, const pointField &cellCentres=pointField::null(), const scalarField &cellWeights=scalarField::null()) const
	Return for every coordinate the wanted processor number.
virtual labelList	decompose (const pointField &points, const scalarField &pointWeights=scalarField::null()) const
	Inherit decompose from decompositionMethod.
virtual labelList	decompose (const polyMesh &mesh, const scalarField &cellWeights, const boolList &blockedFace, const PtrList< labelList > &specifiedProcessorFaces, const labelList &specifiedProcessor, const List< labelPair > &explicitConnections) const
	Inherit decompose from decompositionMethod.
labelList	decompose (const polyMesh &mesh, const scalarField &cWeights) const
	Inherit decompose from decompositionMethod.
Public Member Functions inherited from decompositionMethod
	decompositionMethod (const decompositionMethod &)=delete
	No copy construct.
void	operator= (const decompositionMethod &)=delete
	No copy assignment.
	TypeName ("decompositionMethod")
	Runtime type information.
	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.
virtual	~decompositionMethod ()=default
	Destructor.
label	nDomains () const noexcept
	Number of domains.
label	nDomains (const label n)
	Set number of domains. Return old value.
virtual bool	geometric () const
	True if the method is purely geometric, often using cell centre points.
void	setConstraints (const polyMesh &mesh, boolList &blockedFace, PtrList< labelList > &specifiedProcessorFaces, labelList &specifiedProcessor, List< labelPair > &explicitConnections) const
	Helper: extract constraints:
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.
labelList	decompose (const polyMesh &mesh, const scalarField &cWeights) const
	Decompose a mesh.

Protected Member Functions
virtual label	decomposeSerial (const labelList &adjncy, const labelList &xadj, const List< scalar > &cellWeights, labelList &decomp) const
	Decompose non-parallel.
Protected Member Functions inherited from metisLikeDecomp
virtual label	decomposeGeneral (const labelList &adjncy, const labelList &xadj, const List< scalar > &cellWeights, labelList &decomp) const
	Serial and/or collect/distribute for parallel operation.
	metisLikeDecomp (const metisLikeDecomp &)=delete
	No copy construct.
void	operator= (const metisLikeDecomp &)=delete
	No copy assignment.
	metisLikeDecomp (const label numDomains)
	Construct with number of domains (no coefficients or constraints).
	metisLikeDecomp (const word &derivedType, const dictionary &decompDict, int select=selectionType::NULL_DICT)
	Construct for derived type name and decomposition dictionary.
	metisLikeDecomp (const word &derivedType, const dictionary &decompDict, const word &regionName, int select=selectionType::NULL_DICT)
	Construct for derived type name, decomposition dictionary and (optional) region name.
Protected Member Functions inherited from decompositionMethod
FOAM_NO_DANGLING_REFERENCE const dictionary &	findCoeffsDict (const word &coeffsName, int select=selectionType::DEFAULT) const
	Locate coeffsName dictionary or the fallback "coeffs" dictionary.
	decompositionMethod (const label numDomains)
	Construct with specified number of domains, no coefficients or constraints.

Additional Inherited Members
Static Public Member Functions inherited from decompositionMethod
static label	nDomains (const dictionary &decompDict, const word &regionName="")
	Return region-specific or top-level `numberOfSubdomains` entry.
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.
static autoPtr< decompositionMethod >	New (const dictionary &decompDict, const word &regionName="")
	Return a reference to the selected decomposition method, optionally region-specific.
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.
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.
Protected Types inherited from decompositionMethod
enum	selectionType { DEFAULT = 0 , EXACT = 1 , MANDATORY = 2 , NULL_DICT = 4 }
	Selection type when handling the coefficients dictionary. More...
Static Protected Member Functions inherited from decompositionMethod
static FOAM_NO_DANGLING_REFERENCE 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.
Protected Attributes inherited from metisLikeDecomp
const dictionary &	coeffsDict_
	Coefficients for all derived methods.
Protected Attributes inherited from decompositionMethod
const dictionary &	decompDict_
	Top-level decomposition dictionary (eg, decomposeParDict).
const dictionary &	decompRegionDict_
	Region-specific decomposition dictionary information.
label	nDomains_
	Number of domains for the decomposition.
PtrList< decompositionConstraint >	constraints_
	Optional constraints.

Detailed Description

Metis domain decomposition.

When run in parallel will collect the entire graph on to the master, decompose and send back.

Coefficients dictionary: metisCoeffs, coeffs.

numberOfSubdomains   N;
method               metis;

metisCoeffs
{
    method           recursive;  // k-way
    options          ( ...);
    processorWeights ( ... );
}

Method coefficients: