Convergence criterion which looks at the absolute value of the residual and fails if the linear solver stagnates. More...

#include <combinedcriterion.hh>

Inheritance diagram for Opm::Linear::CombinedCriterion< Vector, CollectiveCommunication >:

Public Member Functions
	CombinedCriterion (const CollectiveCommunication &comm)

	CombinedCriterion (const CollectiveCommunication &comm, Scalar residualReductionTolerance, Scalar absResidualTolerance=0.0, Scalar maxResidual=0.0)

void	setResidualReductionTolerance (Scalar tol)
	Sets the residual reduction tolerance.

Scalar	residualReductionTolerance () const
	Returns the tolerance of the residual reduction of the solution.

Scalar	residualReduction () const
	Returns the reduction of the maximum of the residual compared to the initial solution.

void	setAbsResidualTolerance (Scalar tol)
	Sets the maximum absolute tolerated residual.

Scalar	absResidualTolerance () const
	Returns the tolerated maximum of the the infinity norm of the absolute residual.

Scalar	absResidual () const
	Returns the infinity norm of the absolute residual.

void	setInitial (const Vector &curSol, const Vector &curResid) override
	Set the initial solution of the linear system of equations.

void	update (const Vector &curSol, const Vector &changeIndicator, const Vector &curResid) override
	Update the internal members of the convergence criterion with the current solution.

bool	converged () const override
	Returns true if and only if the convergence criterion is met.

bool	failed () const override
	Returns true if the convergence criterion cannot be met anymore because the solver has broken down.

Scalar	accuracy () const override
	Returns the accuracy of the solution at the last update.

void	printInitial (std::ostream &os=std::cout) const override
	Prints the initial information about the convergence behaviour.

void	print (Scalar iter, std::ostream &os=std::cout) const override
	Prints the information about the convergence behaviour for the current iteration.

Public Member Functions inherited from Opm::Linear::ConvergenceCriterion< Vector >
virtual	~ConvergenceCriterion ()
	Destructor.

virtual void	print (Scalar, std::ostream &=std::cout) const
	Prints the information about the convergence behaviour for the current iteration.

Detailed Description

template<class Vector, class CollectiveCommunication>
class Opm::Linear::CombinedCriterion< Vector, CollectiveCommunication >

Convergence criterion which looks at the absolute value of the residual and fails if the linear solver stagnates.

For the CombinedCriterion, the error of the solution is defined as

$e^k = \max_i\{ \left| r^k_i \right| \}\;,$

where $r^k = \mathbf{A} x^k - b$ is the residual for the k-th iterative solution vector $x^k$ .

In addition, to the reduction of the maximum residual, the linear solver is aborted early if the residual goes below or above absolute limits.

Member Function Documentation

◆ accuracy()

template<class Vector , class CollectiveCommunication >

Scalar Opm::Linear::CombinedCriterion< Vector, CollectiveCommunication >::accuracy ( ) const

inlineoverridevirtual

Returns the accuracy of the solution at the last update.

A value of zero means that the solution was exact.

For the accuracy we only take the residual into account,

Implements Opm::Linear::ConvergenceCriterion< Vector >.

◆ converged()

template<class Vector , class CollectiveCommunication >

bool Opm::Linear::CombinedCriterion< Vector, CollectiveCommunication >::converged ( ) const

inlineoverridevirtual

Returns true if and only if the convergence criterion is met.

Implements Opm::Linear::ConvergenceCriterion< Vector >.

◆ failed()

template<class Vector , class CollectiveCommunication >

bool Opm::Linear::CombinedCriterion< Vector, CollectiveCommunication >::failed ( ) const

inlineoverridevirtual

Returns true if the convergence criterion cannot be met anymore because the solver has broken down.

Reimplemented from Opm::Linear::ConvergenceCriterion< Vector >.

◆ print()

template<class Vector , class CollectiveCommunication >

void Opm::Linear::CombinedCriterion< Vector, CollectiveCommunication >::print	(	Scalar	iter,
		std::ostream &	os = `std::cout`
	)		const

inlineoverride

Prints the information about the convergence behaviour for the current iteration.

Parameters

iter	The iteration number. The semantics of this parameter are chosen by the linear solver.
os	The output stream to which the message gets written.

◆ printInitial()

template<class Vector , class CollectiveCommunication >

void Opm::Linear::CombinedCriterion< Vector, CollectiveCommunication >::printInitial ( std::ostream & os = std::cout ) const

inlineoverridevirtual

Prints the initial information about the convergence behaviour.

This method is called after setInitial() if the solver thinks it's a good idea to be verbose. In practice, "printing the initial information" means printing column headers and the initial state.

Parameters

os	The output stream to which the message gets written.

Reimplemented from Opm::Linear::ConvergenceCriterion< Vector >.

◆ setInitial()

template<class Vector , class CollectiveCommunication >

void Opm::Linear::CombinedCriterion< Vector, CollectiveCommunication >::setInitial	(	const Vector &	curSol,
		const Vector &	curResid
	)

inlineoverridevirtual

Set the initial solution of the linear system of equations.

This version of the method does NOT take the two-norm of the residual as argument. If the two-norm of the defect is available for the linear solver, the version of the update() method with it should be called.

Parameters

curSol	The current iterative solution of the linear system of equations
curResid	The residual vector of the current iterative solution of the linear system of equations

Implements Opm::Linear::ConvergenceCriterion< Vector >.

◆ update()

template<class Vector , class CollectiveCommunication >

void Opm::Linear::CombinedCriterion< Vector, CollectiveCommunication >::update	(	const Vector &	curSol,
		const Vector &	changeIndicator,
		const Vector &	curResid
	)

inlineoverridevirtual

Update the internal members of the convergence criterion with the current solution.

This version of the method does NOT take the two-norm of the residual as argument. If the two-norm of the defect is available for the linear solver, the version of the update() method with it should be called.

Parameters

curSol	The current iterative solution of the linear system of equations
changeIndicator	A vector where all non-zero values indicate that the solution has changed since the last iteration.
curResid	The residual vector of the current iterative solution of the linear system of equations

Implements Opm::Linear::ConvergenceCriterion< Vector >.

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

opm/simulators/linalg/combinedcriterion.hh

Public Member Functions

Detailed Description

Member Function Documentation

◆ accuracy()

◆ converged()

◆ failed()

◆ print()

◆ printInitial()

◆ setInitial()

◆ update()