DUNE PDELab (git)

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

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

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

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.
 

Detailed Description

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

Nonoverlapping parallel BiCGSTAB solver preconditioned by block SSOR.

Template Parameters
GOThe type of the grid operator used for the spatial discretization (or the fakeGOTraits class for the old grid operator space). It is used to adjust the discretization matrix and extract the trial grid function 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

◆ ISTLBackend_NOVLP_BCGS_SSORk()

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

◆ apply()

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]Athe given matrix
[out]zthe solution vector to be computed
[in]rright hand side
[in]reductionto be achieved

◆ norm()

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]vthe given vector

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