TNL::Solvers::Linear::HyprePCG Class Reference

Wrapper for the PCG solver in Hypre. More...

#include <TNL/Solvers/Linear/Hypre.h>

Inheritance diagram for TNL::Solvers::Linear::HyprePCG:

Collaboration diagram for TNL::Solvers::Linear::HyprePCG:

Public Member Functions
	HyprePCG (const Matrices::HypreParCSRMatrix &A)
	HyprePCG (MPI_Comm comm)
HYPRE_Int	getNumIterations () const
void	setAbsTol (double atol)
void	setMatrix (const Matrices::HypreParCSRMatrix &op, bool reuse_setup=false) override
	Set the matrix of the linear system to be solved.
void	setMaxIter (int max_iter)
void	setPreconditioner (HypreSolver &precond)
	Set the Hypre solver to be used as a preconditioner.
void	setPrintLevel (int print_level)
void	setResidualConvergenceOptions (int res_frequency=-1, double rtol=0.0)
	Use the L2 norm of the residual for measuring PCG convergence, plus (optionally) 1) periodically recompute true residuals from scratch; and 2) enable residual-based stopping criteria.
void	setTol (double tol)
HYPRE_PtrToParSolverFcn	setupFcn () const override
	Hypre's internal setup function.
HYPRE_PtrToParSolverFcn	solveFcn () const override
	Hypre's internal solve function.
Public Member Functions inherited from TNL::Solvers::Linear::HypreSolver
	HypreSolver (const Matrices::HypreParCSRMatrix &A)
virtual	operator HYPRE_Solver () const
	Type-cast to HYPRE_Solver.
void	setErrorMode (ErrorMode err_mode) const
	Set the behavior for treating Hypre errors, see the ErrorMode enum. The default mode in the base class is ABORT_HYPRE_ERRORS.
virtual void	setup (const Containers::HypreParVector &b, Containers::HypreParVector &x) const
	Setup the solver for solving the linear system Ax=b.
virtual void	solve (const Containers::HypreParVector &b, Containers::HypreParVector &x) const
	Solve the linear system Ax=b.

Protected Member Functions
void	postSolveHook () const override
	Hook function that is called at the end of solve.

Additional Inherited Members
Public Types inherited from TNL::Solvers::Linear::HypreSolver
enum	ErrorMode { IGNORE_HYPRE_ERRORS , WARN_HYPRE_ERRORS , ABORT_HYPRE_ERRORS }
	How to treat errors returned by Hypre function calls. More...
Protected Attributes inherited from TNL::Solvers::Linear::HypreSolver
const Matrices::HypreParCSRMatrix *	A = nullptr
	The linear system matrix.
ErrorMode	error_mode = ABORT_HYPRE_ERRORS
	How to treat Hypre errors.
bool	setup_called = false
	Indicates if Hypre's setup function was already called.
HYPRE_Solver	solver = nullptr
	Handle for the Hypre solver.

Detailed Description

Wrapper for the PCG solver in Hypre.

Parameters can be set using native Hypre functions, e.g.

TNL::Solvers::Linear::HyprePCG solver;
HYPRE_PCGSetTol(solver, 1e-7);

See the Hypre Reference Manual for the available parameters.

Member Function Documentation

postSolveHook()

void TNL::Solvers::Linear::HyprePCG::postSolveHook ( ) const

overrideprotectedvirtual

Hook function that is called at the end of solve.

Reimplemented from TNL::Solvers::Linear::HypreSolver.

setMatrix()

void TNL::Solvers::Linear::HyprePCG::setMatrix ( const Matrices::HypreParCSRMatrix & op, bool reuse_setup = false )

overridevirtual

Set the matrix of the linear system to be solved.

This function also resets the internal flag indicating whether the Hypre setup function was called for the current matrix.

Parameters

op	The input matrix.
reuse_setup	When true, the result of the previous setup phase will be preserved, i.e., the solver (and preconditioner) will not be updated for the new matrix when calling the solve method.

Reimplemented from TNL::Solvers::Linear::HypreSolver.

setupFcn()

HYPRE_PtrToParSolverFcn TNL::Solvers::Linear::HyprePCG::setupFcn ( ) const

inlineoverridevirtual

Hypre's internal setup function.

Implements TNL::Solvers::Linear::HypreSolver.

solveFcn()

HYPRE_PtrToParSolverFcn TNL::Solvers::Linear::HyprePCG::solveFcn ( ) const

inlineoverridevirtual

Hypre's internal solve function.

Implements TNL::Solvers::Linear::HypreSolver.

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

• src/TNL/Solvers/Linear/Hypre.h
• src/TNL/Solvers/Linear/Hypre.hpp