Dune::PDELab::ISTLBackend_NOVLP_BCGS_SSORk< GO > Class Template Reference

Nonoverlapping parallel BiCGSTAB solver preconditioned by block SSOR. More...

#include <dune/pdelab/backend/novlpistlsolverbackend.hh>

Inheritance diagram for Dune::PDELab::ISTLBackend_NOVLP_BCGS_SSORk< GO >:

Public Member Functions
	ISTLBackend_NOVLP_BCGS_SSORk (const GO &grid_operator, unsigned maxiter_=5000, int steps_=5, int verbose_=1)
	make a linear solver object More...
Vector::ElementType	norm (const Vector &v) const
	Compute global norm of a vector. More...
void	apply (M &A, V &z, W &r, typename V::ElementType reduction)
	Solve the given linear system. More...
const Dune::PDELab::LinearSolverResult < double > &	result () const
	Return access to result data. More...

Detailed Description

template<class GO>
class Dune::PDELab::ISTLBackend_NOVLP_BCGS_SSORk< GO >

Nonoverlapping parallel BiCGSTAB solver preconditioned by block SSOR.

Template Parameters

GO	The type of the grid operator (or the fakeGOTraits class for the old grid operator space).

The solver uses a NonoverlappingBlockPreconditioner with underlying sequential SSOR preconditioner. The crucial step is to add up the matrix entries corresponding to the border vertices on each process. This is achieved by performing a VertexExchanger::sumEntries(Matrix&) before constructing the sequential SSOR.

Constructor & Destructor Documentation

template<class GO >

Dune::PDELab::ISTLBackend_NOVLP_BCGS_SSORk< GO >::ISTLBackend_NOVLP_BCGS_SSORk ( const GO &  grid_operator, unsigned  maxiter_ = 5000, int  steps_ = 5, int  verbose_ = 1  )

inlineexplicit

make a linear solver object

Parameters

[in]	gfs_	a grid function space
[in]	maxiter_	maximum number of iterations to do
[in]	steps_	number of SSOR steps to apply as inner iteration
[in]	verbose_	print messages if true

Member Function Documentation

void Dune::PDELab::ISTLBackend_NOVLP_BASE_PREC< GO, Dune::SeqSSOR , Dune::BiCGSTABSolver >::apply ( M &  A, V &  z, W &  r, typename V::ElementType  reduction  )

inlineinherited

Solve the given linear system.

Parameters

[in]	A	the given matrix
[out]	z	the solution vector to be computed
[in]	r	right hand side
[in]	reduction	to be achieved

References Dune::PDELab::LinearSolverResult< RFType >::conv_rate, Dune::PDELab::LinearSolverResult< RFType >::converged, Dune::PDELab::istl::ParallelHelper< GFS >::createIndexSetAndProjectForAMG(), Dune::PDELab::LinearSolverResult< RFType >::elapsed, Dune::PDELab::LinearSolverResult< RFType >::iterations, Dune::PDELab::istl::raw(), and Dune::PDELab::LinearSolverResult< RFType >::reduction.

Vector::ElementType Dune::PDELab::ISTLBackend_NOVLP_BASE_PREC< GO, Dune::SeqSSOR , Dune::BiCGSTABSolver >::norm ( const Vector &  v ) const

inlineinherited

Compute global norm of a vector.

Parameters

[in]

v

the given vector

const Dune::PDELab::LinearSolverResult<double>& Dune::PDELab::ISTLBackend_NOVLP_BASE_PREC< GO, Dune::SeqSSOR , Dune::BiCGSTABSolver >::result ( ) const

inlineinherited

Return access to result data.

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

• novlpistlsolverbackend.hh