cusp::default_block_monitor< ValueType > Class Template Reference

#include <block_monitor.h>

Public Types
typedef norm_type< ValueType > ::type	Real

Public Member Functions
template<typename MV >
	default_block_monitor (const MV &b, size_t iteration_limit=500, Real absolute_tolerance=1e-6, Real relative_tolerance=1e-6, bool verbose=true)
void	operator++ (void)
template<typename MV >
bool	finished (const MV &r)
template<typename MV >
bool	converged (MV &r) const
size_t	iteration_count () const
size_t	iteration_limit () const
Real	relative_tolerance () const
Real	absolute_tolerance () const
Real	tolerance (int i) const

Protected Attributes
Real	relative_tolerance_
Real	absolute_tolerance_
bool	verbose_
size_t	numRHS
size_t	iteration_limit_
size_t	iteration_count_
cusp::array1d< ValueType, cusp::host_memory >	b_norm

Detailed Description

template<typename ValueType>
class cusp::default_block_monitor< ValueType >

default_monitor : Implements standard convergence criteria and reporting for iterative solvers.

Template Parameters

ValueType

scalar type used in the solver (e.g. float or cusp::complex<double>).

See Also

verbose_monitor

Constructor & Destructor Documentation

template<typename ValueType>

template<typename MV >

cusp::default_block_monitor< ValueType >::default_block_monitor ( const MV &  b, size_t  iteration_limit = 500, Real  absolute_tolerance = 1e-6, Real  relative_tolerance = 1e-6, bool  verbose = true  )

inline

Construct a default_monitor for a given right-hand-side b

The default_monitor terminates iteration when the residual norm satisfies the condition ||b - A x|| <= absolute_tolerance + relative_tolerance * ||b|| or when the iteration limit is reached.

Parameters

b	right-hand-side of the linear system A x = b
iteration_limit	maximum number of solver iterations to allow
relative_tolerance	determines convergence criteria
absolute_tolerance	determines convergence criteria

Template Parameters

VectorType

vector

Member Function Documentation

template<typename ValueType>

Real cusp::default_block_monitor< ValueType >::absolute_tolerance ( ) const

inline

absolute tolerance

Referenced by cusp::default_block_monitor< ValueType >::tolerance().

template<typename ValueType>

template<typename MV >

bool cusp::default_block_monitor< ValueType >::converged ( MV &  r ) const

inline

whether the last tested residual satifies the convergence tolerance

References cusp::default_block_monitor< ValueType >::tolerance().

Referenced by cusp::default_block_monitor< ValueType >::finished().

template<typename ValueType>

template<typename MV >

bool cusp::default_block_monitor< ValueType >::finished ( const MV &  r )

inline

applies convergence criteria to determine whether iteration is finished

Parameters

r	residual vector of the linear system (r = b - A x)

Template Parameters

Vector

vector

References cusp::default_block_monitor< ValueType >::converged(), cusp::default_block_monitor< ValueType >::iteration_count(), cusp::default_block_monitor< ValueType >::iteration_limit(), and cusp::default_block_monitor< ValueType >::tolerance().

template<typename ValueType>

size_t cusp::default_block_monitor< ValueType >::iteration_count ( ) const

inline

number of iterations

Referenced by cusp::default_block_monitor< ValueType >::finished().

template<typename ValueType>

size_t cusp::default_block_monitor< ValueType >::iteration_limit ( ) const

inline

maximum number of iterations

Referenced by cusp::default_block_monitor< ValueType >::finished().

template<typename ValueType>

void cusp::default_block_monitor< ValueType >::operator++ ( void  )

inline

increment the iteration count

template<typename ValueType>

Real cusp::default_block_monitor< ValueType >::relative_tolerance ( ) const

inline

relative tolerance

Referenced by cusp::default_block_monitor< ValueType >::tolerance().

template<typename ValueType>

Real cusp::default_block_monitor< ValueType >::tolerance ( int  i ) const

inline

tolerance

Equal to absolute_tolerance() + relative_tolerance() * ||b||

References cusp::default_block_monitor< ValueType >::absolute_tolerance(), and cusp::default_block_monitor< ValueType >::relative_tolerance().

Referenced by cusp::default_block_monitor< ValueType >::converged(), and cusp::default_block_monitor< ValueType >::finished().

---

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

• block_monitor.h