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| ISTLBackend_NOVLP_BCGS_SSORk (const GO &grid_operator, unsigned maxiter_=5000, int steps_=5, int verbose_=1) |
| make a linear solver object
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Vector::ElementType | norm (const Vector &v) const |
| Compute global norm of a vector.
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void | apply (M &A, V &z, W &r, typename V::ElementType reduction) |
| Solve the given linear system.
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const Dune::PDELab::LinearSolverResult< double > & | result () const |
| Return access to result data.
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template<class GO>
class Dune::PDELab::ISTLBackend_NOVLP_BCGS_SSORk< GO >
Nonoverlapping parallel BiCGSTAB solver preconditioned by block SSOR.
- Template Parameters
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GO | The 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.