Belos Version of the Day
Belos::TFQMRSolMgr< ScalarType, MV, OP > Class Template Reference

The Belos::TFQMRSolMgr provides a powerful and fully-featured solver manager over the TFQMR linear solver. More...

#include <BelosTFQMRSolMgr.hpp>

Inheritance diagram for Belos::TFQMRSolMgr< ScalarType, MV, OP >:
Inheritance graph
[legend]

List of all members.

Public Member Functions

Constructors/Destructor
 TFQMRSolMgr ()
 Empty constructor for TFQMRSolMgr. This constructor takes no arguments and sets the default values for the solver. The linear problem must be passed in using setProblem() before solve() is called on this object. The solver values can be changed using setParameters().
 TFQMRSolMgr (const Teuchos::RCP< LinearProblem< ScalarType, MV, OP > > &problem, const Teuchos::RCP< Teuchos::ParameterList > &pl)
 Basic constructor for TFQMRSolMgr.
virtual ~TFQMRSolMgr ()
 Destructor.
Accessor methods
const LinearProblem
< ScalarType, MV, OP > & 
getProblem () const
 Return a reference to the linear problem being solved by this solver manager.
Teuchos::RCP< const
Teuchos::ParameterList
getValidParameters () const
 Get a parameter list containing the valid parameters for this object.
Teuchos::RCP< const
Teuchos::ParameterList
getCurrentParameters () const
 Get a parameter list containing the current parameters for this object.
Teuchos::Array< Teuchos::RCP
< Teuchos::Time > > 
getTimers () const
 Return the timers for this object.
MagnitudeType achievedTol () const
 Tolerance achieved by the last solve() invocation.
int getNumIters () const
 Get the iteration count for the most recent call to solve().
bool isLOADetected () const
 Whether loss of accuracy was detected during the last solve() invocation.
Set methods
void setProblem (const Teuchos::RCP< LinearProblem< ScalarType, MV, OP > > &problem)
 Set the linear problem that needs to be solved.
void setParameters (const Teuchos::RCP< Teuchos::ParameterList > &params)
 Set the parameters the solver manager should use to solve the linear problem.
Reset methods
void reset (const ResetType type)
 Performs a reset of the solver manager specified by the ResetType. This informs the solver manager that the solver should prepare for the next call to solve by resetting certain elements of the iterative solver strategy.
Solver application methods
ReturnType solve ()
 This method performs possibly repeated calls to the underlying linear solver's iterate() routine until the problem has been solved (as decided by the solver manager) or the solver manager decides to quit.
Overridden from Teuchos::Describable
std::string description () const
 Method to return description of the TFQMR solver manager.

Detailed Description

template<class ScalarType, class MV, class OP>
class Belos::TFQMRSolMgr< ScalarType, MV, OP >

The Belos::TFQMRSolMgr provides a powerful and fully-featured solver manager over the TFQMR linear solver.

Author:
Heidi Thornquist
Examples:

TFQMR/TFQMREpetraExFile.cpp.

Definition at line 104 of file BelosTFQMRSolMgr.hpp.


Constructor & Destructor Documentation

template<class ScalarType , class MV , class OP >
Belos::TFQMRSolMgr< ScalarType, MV, OP >::TFQMRSolMgr ( )

Empty constructor for TFQMRSolMgr. This constructor takes no arguments and sets the default values for the solver. The linear problem must be passed in using setProblem() before solve() is called on this object. The solver values can be changed using setParameters().

Definition at line 334 of file BelosTFQMRSolMgr.hpp.

template<class ScalarType , class MV , class OP >
Belos::TFQMRSolMgr< ScalarType, MV, OP >::TFQMRSolMgr ( const Teuchos::RCP< LinearProblem< ScalarType, MV, OP > > &  problem,
const Teuchos::RCP< Teuchos::ParameterList > &  pl 
)

Basic constructor for TFQMRSolMgr.

This constructor accepts the LinearProblem to be solved in addition to a parameter list of options for the solver manager. These options include the following:

  • "Maximum Iterations" - an int specifying the maximum number of iterations the underlying solver is allowed to perform. Default: 1000
  • "Convergence Tolerance" - a MagnitudeType specifying the level that residual norms must reach to decide convergence. Default: 1e-8.
  • "Verbosity" - a sum of MsgType specifying the verbosity. Default: Belos::Errors
  • "Output Style" - a OutputType specifying the style of output. Default: Belos::General
  • "Output Stream" - a reference-counted pointer to the output stream where all solver output is sent. Default: Teuchos::rcp(&std::cout,false)
  • "Output Frequency" - an int specifying how often convergence information should be outputted. Default: -1 (never)
  • "Timer Label" - a std::string to use as a prefix for the timer labels. Default: "Belos"

Definition at line 355 of file BelosTFQMRSolMgr.hpp.

template<class ScalarType , class MV , class OP >
virtual Belos::TFQMRSolMgr< ScalarType, MV, OP >::~TFQMRSolMgr ( ) [inline, virtual]

Destructor.

Definition at line 145 of file BelosTFQMRSolMgr.hpp.


Member Function Documentation

template<class ScalarType , class MV , class OP >
const LinearProblem<ScalarType,MV,OP>& Belos::TFQMRSolMgr< ScalarType, MV, OP >::getProblem ( ) const [inline, virtual]

Return a reference to the linear problem being solved by this solver manager.

Implements Belos::SolverManager< ScalarType, MV, OP >.

Definition at line 151 of file BelosTFQMRSolMgr.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP< const Teuchos::ParameterList > Belos::TFQMRSolMgr< ScalarType, MV, OP >::getValidParameters ( ) const [virtual]

Get a parameter list containing the valid parameters for this object.

Implements Belos::SolverManager< ScalarType, MV, OP >.

Definition at line 624 of file BelosTFQMRSolMgr.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::RCP<const Teuchos::ParameterList> Belos::TFQMRSolMgr< ScalarType, MV, OP >::getCurrentParameters ( ) const [inline, virtual]

Get a parameter list containing the current parameters for this object.

Implements Belos::SolverManager< ScalarType, MV, OP >.

Definition at line 161 of file BelosTFQMRSolMgr.hpp.

template<class ScalarType , class MV , class OP >
Teuchos::Array<Teuchos::RCP<Teuchos::Time> > Belos::TFQMRSolMgr< ScalarType, MV, OP >::getTimers ( ) const [inline]

Return the timers for this object.

The timers are ordered as follows:

Definition at line 168 of file BelosTFQMRSolMgr.hpp.

template<class ScalarType , class MV , class OP >
MagnitudeType Belos::TFQMRSolMgr< ScalarType, MV, OP >::achievedTol ( ) const [inline, virtual]

Tolerance achieved by the last solve() invocation.

This is the maximum over all right-hand sides' achieved convergence tolerances, and is set whether or not the solve actually managed to achieve the desired convergence tolerance.

Reimplemented from Belos::SolverManager< ScalarType, MV, OP >.

Definition at line 177 of file BelosTFQMRSolMgr.hpp.

template<class ScalarType , class MV , class OP >
int Belos::TFQMRSolMgr< ScalarType, MV, OP >::getNumIters ( ) const [inline, virtual]

Get the iteration count for the most recent call to solve().

Implements Belos::SolverManager< ScalarType, MV, OP >.

Definition at line 182 of file BelosTFQMRSolMgr.hpp.

template<class ScalarType , class MV , class OP >
bool Belos::TFQMRSolMgr< ScalarType, MV, OP >::isLOADetected ( ) const [inline, virtual]

Whether loss of accuracy was detected during the last solve() invocation.

In solvers that can detect a loss of accuracy, this method would say whether the solver detected it in the most recent solve() invocation. However, our TFQMR implementation does not currently detect a loss of accuracy, so this method always returns false.

Implements Belos::SolverManager< ScalarType, MV, OP >.

Definition at line 193 of file BelosTFQMRSolMgr.hpp.

template<class ScalarType , class MV , class OP >
void Belos::TFQMRSolMgr< ScalarType, MV, OP >::setProblem ( const Teuchos::RCP< LinearProblem< ScalarType, MV, OP > > &  problem) [inline, virtual]

Set the linear problem that needs to be solved.

Implements Belos::SolverManager< ScalarType, MV, OP >.

Definition at line 201 of file BelosTFQMRSolMgr.hpp.

template<class ScalarType , class MV , class OP >
void Belos::TFQMRSolMgr< ScalarType, MV, OP >::setParameters ( const Teuchos::RCP< Teuchos::ParameterList > &  params) [virtual]

Set the parameters the solver manager should use to solve the linear problem.

Implements Belos::SolverManager< ScalarType, MV, OP >.

Definition at line 384 of file BelosTFQMRSolMgr.hpp.

template<class ScalarType , class MV , class OP >
void Belos::TFQMRSolMgr< ScalarType, MV, OP >::reset ( const ResetType  type) [inline, virtual]

Performs a reset of the solver manager specified by the ResetType. This informs the solver manager that the solver should prepare for the next call to solve by resetting certain elements of the iterative solver strategy.

Implements Belos::SolverManager< ScalarType, MV, OP >.

Definition at line 214 of file BelosTFQMRSolMgr.hpp.

template<class ScalarType , class MV , class OP >
ReturnType Belos::TFQMRSolMgr< ScalarType, MV, OP >::solve ( ) [virtual]

This method performs possibly repeated calls to the underlying linear solver's iterate() routine until the problem has been solved (as decided by the solver manager) or the solver manager decides to quit.

This method calls TFQMRIter::iterate(), which will return either because a specially constructed status test evaluates to Passed or an std::exception is thrown.

A return from TFQMRIter::iterate() signifies one of the following scenarios:

  • the maximum number of iterations has been exceeded. In this scenario, the current solutions to the linear system will be placed in the linear problem and return Unconverged.
  • global convergence has been met. In this case, the current solutions to the linear system will be placed in the linear problem and the solver manager will return Converged
Returns:
ReturnType specifying:
  • Converged: the linear problem was solved to the specification required by the solver manager.
  • Unconverged: the linear problem was not solved to the specification desired by the solver manager.

Implements Belos::SolverManager< ScalarType, MV, OP >.

Definition at line 666 of file BelosTFQMRSolMgr.hpp.

template<class ScalarType , class MV , class OP >
std::string Belos::TFQMRSolMgr< ScalarType, MV, OP >::description ( ) const [virtual]

Method to return description of the TFQMR solver manager.

Reimplemented from Teuchos::Describable.

Definition at line 879 of file BelosTFQMRSolMgr.hpp.


The documentation for this class was generated from the following file:
 All Classes Namespaces Files Functions Variables Typedefs Enumerations Enumerator Friends Defines