kahipDecomp.H

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License
    This file is part of OpenFOAM.
 
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Class
    Foam::kahipDecomp
 
Description
    Domain decomposition using KaHIP
    http://algo2.iti.kit.edu/documents/kahip/
 
    When run in parallel will collect the entire graph on to the master,
    decompose and send back.
 
    Coefficients dictionary: \a kahipCoeffs, \a coeffs.
 
    \verbatim
    numberOfSubdomains   N;
    method               kahip;
 
    kahipCoeffs
    {
        config          fast;
        imbalance       0.01;
    }
    \endverbatim
 
    Method coefficients:
    \table
        Property  | Description                          | Required | Default
        config    | fast / eco / strong                  | no       | fast
        imbalance | imbalance on cells between domains   | no       | 0.01
        seed      | initial value for random number generator | no  | 0
    \endtable
 
SourceFiles
    kahipDecomp.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef kahipDecomp_H
#define kahipDecomp_H
 
#include "metisLikeDecomp.H"
#include "Enum.H"
 
namespace Foam
{
 
/*---------------------------------------------------------------------------*\
                         Class kahipDecomp Declaration
\*---------------------------------------------------------------------------*/
 
class kahipDecomp
:
    public metisLikeDecomp
{
protected:
 
    // Protected Member Functions
 
        //- Call kahip with options from dictionary.
        virtual label decomposeSerial
        (
            const labelList& adjncy,
            const labelList& xadj,
            const List<scalar>& cellWeights,
            labelList& decomp
        ) const;
 
 
        //- No copy construct
        kahipDecomp(const kahipDecomp&) = delete;
 
        //- No copy assignment
        void operator=(const kahipDecomp&) = delete;
 
 
public:
 
    //- The predefined KaHIP configuration types
    enum class configs
    {
        FAST = 0, 
        ECO = 1,
        STRONG = 2,
        FASTSOCIAL = 3,
        ECOSOCIAL = 4,
        STRONGSOCIAL = 5,
    };
 
 
    //- The selection names for predefined KaHIP configurations
    static const Enum<configs> configNames;
 
 
    //- Runtime type information
    TypeName("kahip");
 
 
    // Constructors
 
        //- Construct given decomposition dictionary and optional region name
        explicit kahipDecomp
        (
            const dictionary& decompDict,
            const word& regionName = ""
        );
 
 
    //- Destructor
    virtual ~kahipDecomp() = default;
 
 
    // Member Functions
 
        virtual bool parallelAware() const
        {
            return true;
        }
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //