SF::abstract_linear_solver< T, S > Struct Template Reference

#include <SF_abstract_lin_solver.h>

Collaboration diagram for SF::abstract_linear_solver< T, S >:

Public Types
enum	norm_t {   absPreResidual, absUnpreResidual, relResidual, absPreRelResidual,   norm_unset }

Public Member Functions
virtual void	operator() (abstract_vector< T, S > &x, const abstract_vector< T, S > &b)=0
virtual	~abstract_linear_solver ()=default
virtual void	setup_solver (abstract_matrix< T, S > &mat, double tol, int max_it, short norm, std::string name, bool has_nullspace, void *logger, const char *solver_opts_file, const char *default_opts)=0

Public Attributes
std::string	name
	the solver name More...
const char *	options_file
	the file containing the solver options More...
norm_t	norm = norm_unset
SF_real	final_residual = -1.0
	Holds the residual after convergence. More...
SF_real	time = 0.0
	solver runtime More...
SF_int	niter = -1
	number of iterations More...
SF_int	max_it = 0
	max number of iterations More...
SF_int	reason = 0
	number of iterations More...

Protected Member Functions
virtual void	set_stopping_criterion (norm_t normtype, double tol, int max_it, bool verbose, void *logger)=0
norm_t	convert_param_norm_type (short param_norm_type) const

Detailed Description

template<class T, class S>
struct SF::abstract_linear_solver< T, S >

Simple struct holding informations and operations related to linear solvers.

Template Parameters

T	Integer type (indices).
S	Floating point type (values).

See also

ginkgo_solver

petsc_solver

Note

The initialization of solvers varies hugely, so we provide a generic setup function containing redundant information for some solvers.

Definition at line 40 of file SF_abstract_lin_solver.h.

Member Enumeration Documentation

norm_t

template<class T, class S>

enum SF::abstract_linear_solver::norm_t

Enum representing the residual norm stopping criterion type.

Enumerator
absPreResidual
absUnpreResidual
relResidual
absPreRelResidual
norm_unset

Definition at line 46 of file SF_abstract_lin_solver.h.

Constructor & Destructor Documentation

~abstract_linear_solver()

template<class T, class S>

virtual SF::abstract_linear_solver< T, S >::~abstract_linear_solver ( )

virtualdefault

Default destructor.

Member Function Documentation

convert_param_norm_type()

template<class T, class S>

norm_t SF::abstract_linear_solver< T, S >::convert_param_norm_type ( short  param_norm_type ) const

inlineprotected

Simple helper function converting a short (number) to norm_t

Parameters

param_norm_type

a short number representing the norm type

Returns

the norm type as a norm_t enum

Definition at line 104 of file SF_abstract_lin_solver.h.

operator()()

template<class T, class S>

virtual void SF::abstract_linear_solver< T, S >::operator() ( abstract_vector< T, S > &  x, const abstract_vector< T, S > &  b  )

pure virtual

Solve the system Ax=b.

Parameters

x	The solution vector
b	The right hand side

set_stopping_criterion()

template<class T, class S>

virtual void SF::abstract_linear_solver< T, S >::set_stopping_criterion ( norm_t  normtype, double  tol, int  max_it, bool  verbose, void *  logger  )

protectedpure virtual

Set the stopping criterion parameters for the solver.

Parameters

normtype	The type of residual norm.
tol	The tolerance to which the solver should converge.
mat_it	The maximum number of iterations for the solver.
verbose	Whether to print detailed informations.
logger	A generic pointer to the logger object.

setup_solver()

template<class T, class S>

virtual void SF::abstract_linear_solver< T, S >::setup_solver ( abstract_matrix< T, S > &  mat, double  tol, int  max_it, short  norm, std::string  name, bool  has_nullspace, void *  logger, const char *  solver_opts_file, const char *  default_opts  )

pure virtual

Setup the solver characteristics.

Parameters

mat	The system matrix.
tol	The tolerance to which the solver should converge.
mat_it	The maximum number of iterations for the solver.
name	The solver name.
has_nullspace	Whether there is a constant nullspace or not.
logger	A generic pointer to the logger object.
default_opts	A string representing default PETSc options. Used by petsc only.

Member Data Documentation

final_residual

template<class T, class S>

SF_real SF::abstract_linear_solver< T, S >::final_residual = -1.0

Holds the residual after convergence.

Definition at line 50 of file SF_abstract_lin_solver.h.

max_it

template<class T, class S>

SF_int SF::abstract_linear_solver< T, S >::max_it = 0

max number of iterations

Definition at line 53 of file SF_abstract_lin_solver.h.

name

template<class T, class S>

std::string SF::abstract_linear_solver< T, S >::name

the solver name

Definition at line 42 of file SF_abstract_lin_solver.h.

niter

template<class T, class S>

SF_int SF::abstract_linear_solver< T, S >::niter = -1

number of iterations

Definition at line 52 of file SF_abstract_lin_solver.h.

norm

template<class T, class S>

norm_t SF::abstract_linear_solver< T, S >::norm = norm_unset

Definition at line 47 of file SF_abstract_lin_solver.h.

options_file

template<class T, class S>

const char* SF::abstract_linear_solver< T, S >::options_file

the file containing the solver options

Definition at line 43 of file SF_abstract_lin_solver.h.

reason

template<class T, class S>

SF_int SF::abstract_linear_solver< T, S >::reason = 0

number of iterations

Definition at line 54 of file SF_abstract_lin_solver.h.

time

template<class T, class S>

SF_real SF::abstract_linear_solver< T, S >::time = 0.0

solver runtime

Definition at line 51 of file SF_abstract_lin_solver.h.

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

• fem/slimfem/src/SF_abstract_lin_solver.h