#include <PreconditionerLinearWithBlock.h>

Inheritance diagram for Nektar::MultiRegions::PreconditionerLinearWithBlock:

Public Member Functions
	PreconditionerLinearWithBlock (const std::shared_ptr< GlobalLinSys > &plinsys, const AssemblyMapSharedPtr &pLocToGloMap)

	~PreconditionerLinearWithBlock () override

Public Member Functions inherited from Nektar::MultiRegions::Preconditioner
	Preconditioner (const std::shared_ptr< GlobalLinSys > &plinsys, const AssemblyMapSharedPtr &pLocToGloMap)

virtual	~Preconditioner ()

void	DoPreconditioner (const Array< OneD, NekDouble > &pInput, Array< OneD, NekDouble > &pOutput, const bool &IsLocal=false)

void	DoAssembleLoc (const Array< OneD, NekDouble > &pInput, Array< OneD, NekDouble > &pOutput, const bool &ZeroDir)
	Apply an assembly and scatter back to lcoal array. More...

void	DoPreconditionerWithNonVertOutput (const Array< OneD, NekDouble > &pInput, Array< OneD, NekDouble > &pOutput, const Array< OneD, NekDouble > &pNonVertOutput, Array< OneD, NekDouble > &pVertForce=NullNekDouble1DArray)

void	DoTransformBasisToLowEnergy (Array< OneD, NekDouble > &pInOut)

void	DoTransformCoeffsFromLowEnergy (Array< OneD, NekDouble > &pInOut)

void	DoTransformCoeffsToLowEnergy (const Array< OneD, NekDouble > &pInput, Array< OneD, NekDouble > &pOutput)

void	DoTransformBasisFromLowEnergy (const Array< OneD, NekDouble > &pInput, Array< OneD, NekDouble > &pOutput)

void	BuildPreconditioner ()

void	InitObject ()

Array< OneD, NekDouble >	AssembleStaticCondGlobalDiagonals ()
	Performs global assembly of diagonal entries to global Schur complement matrix. More...

const DNekScalBlkMatSharedPtr &	GetBlockTransformedSchurCompl () const

const DNekScalBlkMatSharedPtr &	GetBlockCMatrix () const

const DNekScalBlkMatSharedPtr &	GetBlockInvDMatrix () const

const DNekScalBlkMatSharedPtr &	GetBlockSchurCompl () const

const DNekScalBlkMatSharedPtr &	GetBlockTransformationMatrix () const

const DNekScalBlkMatSharedPtr &	GetBlockTransposedTransformationMatrix () const

DNekScalMatSharedPtr	TransformedSchurCompl (int offset, int bndoffset, const std::shared_ptr< DNekScalMat > &loc_mat)

Static Public Member Functions
static PreconditionerSharedPtr	create (const std::shared_ptr< GlobalLinSys > &plinsys, const std::shared_ptr< AssemblyMap > &pLocToGloMap)
	Creates an instance of this class. More...

Static Public Attributes
static std::string	className
	Name of class. More...

Protected Member Functions
void	v_InitObject () override

void	v_DoPreconditioner (const Array< OneD, NekDouble > &pInput, Array< OneD, NekDouble > &pOutput, const bool &isLocal=false) override
	Apply a preconditioner to the conjugate gradient method. More...

void	v_BuildPreconditioner () override

Protected Member Functions inherited from Nektar::MultiRegions::Preconditioner
virtual DNekScalMatSharedPtr	v_TransformedSchurCompl (int offset, int bndoffset, const std::shared_ptr< DNekScalMat > &loc_mat)
	Get block elemental transposed transformation matrix \(\mathbf{R}^{T}\). More...

virtual void	v_InitObject ()

virtual void	v_DoPreconditioner (const Array< OneD, NekDouble > &pInput, Array< OneD, NekDouble > &pOutput, const bool &isLocal=false)
	Apply a preconditioner to the conjugate gradient method. More...

virtual void	v_DoPreconditionerWithNonVertOutput (const Array< OneD, NekDouble > &pInput, Array< OneD, NekDouble > &pOutput, const Array< OneD, NekDouble > &pNonVertOutput, Array< OneD, NekDouble > &pVertForce)
	Apply a preconditioner to the conjugate gradient method with an output for non-vertex degrees of freedom. More...

virtual void	v_DoTransformBasisToLowEnergy (Array< OneD, NekDouble > &pInOut)
	Transform from original basis to low energy basis. More...

virtual void	v_DoTransformCoeffsFromLowEnergy (Array< OneD, NekDouble > &pInOut)
	Transform from low energy coeffs to orignal basis. More...

virtual void	v_DoTransformCoeffsToLowEnergy (const Array< OneD, NekDouble > &pInput, Array< OneD, NekDouble > &pOutput)
	Multiply by the block inverse transformation matrix. More...

virtual void	v_DoTransformBasisFromLowEnergy (const Array< OneD, NekDouble > &pInput, Array< OneD, NekDouble > &pOutput)
	Multiply by the block transposed inverse transformation matrix. More...

virtual void	v_BuildPreconditioner ()

Protected Attributes
PreconditionerSharedPtr	m_linSpacePrecon

PreconditionerSharedPtr	m_blockPrecon

Protected Attributes inherited from Nektar::MultiRegions::Preconditioner
const std::weak_ptr< GlobalLinSys >	m_linsys

std::string	m_preconType

DNekMatSharedPtr	m_preconditioner

std::weak_ptr< AssemblyMap >	m_locToGloMap

Detailed Description

This class implements preconditioning for the conjugate gradient matrix solver.

Definition at line 47 of file PreconditionerLinearWithBlock.h.

Constructor & Destructor Documentation

◆ PreconditionerLinearWithBlock()

Nektar::MultiRegions::PreconditionerLinearWithBlock::PreconditionerLinearWithBlock	(	const std::shared_ptr< GlobalLinSys > &	plinsys,
		const AssemblyMapSharedPtr &	pLocToGloMap
	)

Definition at line 60 of file PreconditionerLinearWithBlock.cpp.

    : Preconditioner(plinsys, pLocToGloMap)
{
}

◆ ~PreconditionerLinearWithBlock()

Nektar::MultiRegions::PreconditionerLinearWithBlock::~PreconditionerLinearWithBlock ( )

inlineoverride

Definition at line 70 of file PreconditionerLinearWithBlock.h.

71 {

72 }

Member Function Documentation

◆ create()

static PreconditionerSharedPtr Nektar::MultiRegions::PreconditionerLinearWithBlock::create	(	const std::shared_ptr< GlobalLinSys > &	plinsys,
		const std::shared_ptr< AssemblyMap > &	pLocToGloMap
	)

inlinestatic

Creates an instance of this class.

Definition at line 51 of file PreconditionerLinearWithBlock.h.

    {
        PreconditionerSharedPtr p =
            MemoryManager<PreconditionerLinearWithBlock>::AllocateSharedPtr(
                plinsys, pLocToGloMap);
        p->InitObject();
        return p;
    }

References Nektar::MemoryManager< DataType >::AllocateSharedPtr(), and CellMLToNektar.cellml_metadata::p.

◆ v_BuildPreconditioner()

void Nektar::MultiRegions::PreconditionerLinearWithBlock::v_BuildPreconditioner ( )

overrideprotectedvirtual

Reimplemented from Nektar::MultiRegions::Preconditioner.

Definition at line 81 of file PreconditionerLinearWithBlock.cpp.

{
    m_linSpacePrecon->BuildPreconditioner();
    m_blockPrecon->BuildPreconditioner();
}

References m_blockPrecon, and m_linSpacePrecon.

◆ v_DoPreconditioner()

void Nektar::MultiRegions::PreconditionerLinearWithBlock::v_DoPreconditioner	(	const Array< OneD, NekDouble > &	pInput,
		Array< OneD, NekDouble > &	pOutput,
		const bool &	isLocal = `false`
	)

overrideprotectedvirtual

Apply a preconditioner to the conjugate gradient method.

Reimplemented from Nektar::MultiRegions::Preconditioner.

Definition at line 90 of file PreconditionerLinearWithBlock.cpp.

{
    ASSERTL0(isLocal == false, "PreconditionerLinearWithBlock is only set up "
                               "for Global iteratives sovles");
    int nGlobal = pInput.size();
 
    Array<OneD, NekDouble> OutputBlock(nGlobal, 0.0);
    Array<OneD, NekDouble> OutputLinear(nGlobal, 0.0);
    Array<OneD, NekDouble> InputLinear(nGlobal, 0.0);
 
    // Apply Low Energy preconditioner
    m_blockPrecon->DoPreconditioner(pInput, OutputBlock);
 
    // Apply linear space preconditioner
    m_linSpacePrecon->DoPreconditionerWithNonVertOutput(pInput, pOutput,
                                                        OutputBlock);
}

References ASSERTL0, m_blockPrecon, and m_linSpacePrecon.

◆ v_InitObject()

void Nektar::MultiRegions::PreconditionerLinearWithBlock::v_InitObject ( )

overrideprotectedvirtual

Reimplemented from Nektar::MultiRegions::Preconditioner.

Definition at line 70 of file PreconditionerLinearWithBlock.cpp.

{
    m_linSpacePrecon = GetPreconFactory().CreateInstance(
        "FullLinearSpace", m_linsys.lock(), m_locToGloMap.lock());
    m_blockPrecon = GetPreconFactory().CreateInstance("Block", m_linsys.lock(),
                                                      m_locToGloMap.lock());
}

References Nektar::LibUtilities::NekFactory< tKey, tBase, tParam >::CreateInstance(), Nektar::MultiRegions::GetPreconFactory(), m_blockPrecon, m_linSpacePrecon, Nektar::MultiRegions::Preconditioner::m_linsys, and Nektar::MultiRegions::Preconditioner::m_locToGloMap.

Member Data Documentation

◆ className

string Nektar::MultiRegions::PreconditionerLinearWithBlock::className

static

Initial value:

=
    GetPreconFactory().RegisterCreatorFunction(
        "FullLinearSpaceWithBlock", PreconditionerLinearWithBlock::create,
        "Full Linear space and block preconditioning")