Dune::PDELab::ISTLBackend_NOVLP_CG_AMG_SSOR< GO, s > Class Template Reference

Nonoverlapping parallel CG solver preconditioned with AMG smoothed by SSOR. More...

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

Public Member Functions
void	setParameters (const Parameters &params_)
	set AMG parameters More...
const Parameters &	parameters () const
	Get the parameters describing the behaviuour of AMG. More...
void	setReuse (bool reuse_)
	Set whether the AMG should be reused again during call to apply().
bool	getReuse () const
	Return whether the AMG is reused during call to apply()
V::ElementType	norm (const V &v) const
	compute global norm of a vector More...
const ISTLAMGStatistics &	statistics () const
	Get statistics of the AMG solver (no of levels, timings). More...
const Dune::PDELab::LinearSolverResult< double > &	result () const
	Return access to result data.

Detailed Description

template<class GO, int s = 96>
class Dune::PDELab::ISTLBackend_NOVLP_CG_AMG_SSOR< GO, s >

Nonoverlapping parallel CG solver preconditioned with AMG smoothed by SSOR.

Template Parameters

GO	The type of the grid operator (or the fakeGOTraits class for the old grid operator space). This class will be used to adjust the discretization matrix. and extract the trial grid function space.
s	The bits to use for the global index.

The solver uses AMG 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&).

Member Function Documentation

norm()

template<class GO , int s, template< class, class, class, int > class Preconditioner, template< class > class Solver>

V::ElementType Dune::PDELab::ISTLBackend_AMG_NOVLP< GO, s, Preconditioner, Solver >::norm ( const V &  v ) const

inlineinherited

compute global norm of a vector

Parameters

[in]

v

the given vector

parameters()

template<class GO , int s, template< class, class, class, int > class Preconditioner, template< class > class Solver>

const Parameters & Dune::PDELab::ISTLBackend_AMG_NOVLP< GO, s, Preconditioner, Solver >::parameters ( ) const

inlineinherited

Get the parameters describing the behaviuour of AMG.

The returned object can be adjusted to ones needs and then can be reset using setParameters.

Returns

The object holding the parameters of AMG.

setParameters()

template<class GO , int s, template< class, class, class, int > class Preconditioner, template< class > class Solver>

void Dune::PDELab::ISTLBackend_AMG_NOVLP< GO, s, Preconditioner, Solver >::setParameters ( const Parameters &  params_ )

inlineinherited

set AMG parameters

Parameters

[in]

params_

a parameter object of Type Dune::Amg::Parameters

statistics()

template<class GO , int s, template< class, class, class, int > class Preconditioner, template< class > class Solver>

const ISTLAMGStatistics & Dune::PDELab::ISTLBackend_AMG_NOVLP< GO, s, Preconditioner, Solver >::statistics ( ) const

inlineinherited

Get statistics of the AMG solver (no of levels, timings).

Returns

statistis of the AMG solver.

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

• dune/pdelab/backend/istl/novlpistlsolverbackend.hh