Amesos2 - Direct Sparse Solver Interfaces  Version of the Day
Public Types | Public Member Functions | Protected Member Functions | Protected Attributes | Private Member Functions | List of all members
Amesos2::SolverCore< ConcreteSolver, Matrix, Vector > Class Template Reference
Amesos2 Solver Framework

Amesos2::SolverCore: A templated interface for interaction with third-party direct sparse solvers. More...

#include <Amesos2_SolverCore_decl.hpp>

Inheritance diagram for Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >:
Inheritance graph
[legend]
Collaboration diagram for Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >:
Collaboration graph
[legend]

Public Types

typedef SolverCore
< ConcreteSolver, Matrix,
Vector > 		type
 
typedef Solver< Matrix, Vector > super_type
 
typedef ConcreteSolver< Matrix,
Vector > 		solver_type
 
typedef Matrix matrix_type
 
typedef Vector vector_type
 
typedef MatrixAdapter
< matrix_type >::scalar_t 		scalar_type
 
typedef MatrixAdapter
< matrix_type >
::local_ordinal_t 		local_ordinal_type
 
typedef MatrixAdapter
< matrix_type >
::global_ordinal_t 		global_ordinal_type
 
typedef MatrixAdapter
< matrix_type >::global_size_t 		global_size_type
 
typedef MatrixAdapter
< matrix_type >::node_t 		node_type
 

Public Member Functions

bool matrixShapeOK () override
 Returns true if the solver can handle this matrix shape. More...
 
void setA (const Teuchos::RCP< const Matrix > a, EPhase keep_phase=CLEAN) override
 Sets the matrix A of this solver. More...
 
void setA (const Matrix *a, EPhase keep_phase=CLEAN) override
 Sets the matrix A of this solver. More...
 
void setX (const Teuchos::RCP< Vector > x) override
 Sets the LHS vector X.
 
void setX (Vector *x) override
 Sets the LHS vector X using a raw pointer.
 
const Teuchos::RCP< Vector > getX () override
 Returns the vector that is the LHS of the linear system.
 
Vector * getXRaw () override
 Returns a raw pointer to the LHS of the linear system.
 
void setB (const Teuchos::RCP< const Vector > b) override
 Sets the RHS vector B.
 
void setB (const Vector *b) override
 Sets the RHS vector B using a raw pointer.
 
const Teuchos::RCP< const Vector > getB () override
 Returns the vector that is the RHS of the linear system.
 
const Vector * getBRaw () override
 Returns a raw pointer to the RHS of the linear system.
 
std::string description () const override
 Returns a short description of this Solver.
 
void describe (Teuchos::FancyOStream &out, const Teuchos::EVerbosityLevel verbLevel=Teuchos::Describable::verbLevel_default) const override
 
void printTiming (Teuchos::FancyOStream &out, const Teuchos::EVerbosityLevel verbLevel) const override
 Prints timing information about the current solver. More...
 
void getTiming (Teuchos::ParameterList &timingParameterList) const override
 Extracts timing information from the current solver. More...
 
std::string name () const override
 Return the name of this solver. More...
 
Constructor/Destructor methods
 SolverCore (Teuchos::RCP< const Matrix > A, Teuchos::RCP< Vector > X, Teuchos::RCP< const Vector > B)
 Initialize a Solver instance. More...
 
 ~SolverCore ()
 Destructor.
 
 SolverCore (const solver_type &rhs)
 Do not allow copying of this Solver object.
 
super_type & operator= (const solver_type *rhs)
 Do not allow copying of this Solver by assignment.
 
Mathematical functions
super_type & preOrdering () override
 Pre-orders the matrix A for minimal fill-in. More...
 
super_type & symbolicFactorization () override
 Performs symbolic factorization on the matrix A. More...
 
super_type & numericFactorization () override
 Performs numeric factorization on the matrix A. More...
 
void solve () override
 Solves $ A X = B$ (or $ A^T X = B$ ) More...
 
void solve (const Teuchos::Ptr< Vector > X, const Teuchos::Ptr< const Vector > B) const override
 Solve $ A X = B$ using the given X and B vectors. More...
 
void solve (Vector *X, const Vector *B) const override
 Solve $ A X = B$ using the given X and B vectors. More...
 
int solve_ir (const Teuchos::Ptr< Vector > X, const Teuchos::Ptr< const Vector > B, const int maxNumIters, const bool verbose) const
 
int solve_ir (Vector *X, const Vector *B, const int maxNumIters, const bool verbose) const
 
int solve_ir (const int maxNumIters, const bool verbose)
 
Parameter methods
super_type & setParameters (const Teuchos::RCP< Teuchos::ParameterList > &parameterList) override
 Set/update internal variables and solver options. More...
 
Teuchos::RCP< const
Teuchos::ParameterList > 		getValidParameters () const override
 Return a const parameter list of all of the valid parameters that this->setParameterList(...) will accept. More...
 
void setParameterList (const Teuchos::RCP< Teuchos::ParameterList > &parameterList)
 Set or update internal variables and solver options. More...
 
Teuchos::RCP
< Teuchos::ParameterList > 		getNonconstParameterList ()
 This is a empty stub. More...
 
Teuchos::RCP
< Teuchos::ParameterList > 		unsetParameterList ()
 This is an empty stub. More...
 
Accessor methods
Teuchos::RCP< const
Teuchos::Comm< int > > 		getComm () const override
 Returns a pointer to the Teuchos::Comm communicator with this operator.
 
Status & getStatus () const override
 Returns a reference to this solver's internal status object.
 

Protected Member Functions

void setNnzLU (size_t nnz)
 Set the number of non-zero values in the $L$ and $U$ factors. More...
 

Protected Attributes

Teuchos::RCP< const
MatrixAdapter< Matrix > > 		matrixA_
 The LHS operator.
 
bool matrix_loaded_
 
Teuchos::RCP< Vector > multiVecX_
 The LHS vector/multi-vector.
 
Teuchos::RCP< const Vector > multiVecB_
 The RHS vector/multi-vector. More...
 
global_size_type globalNumRows_
 Number of global rows in matrixA_.
 
global_size_type globalNumCols_
 Number of global columns in matrixA_.
 
global_size_type globalNumNonZeros_
 Number of global non-zero values in matrixA_.
 
global_size_type rowIndexBase_
 Index base of rowmap of matrixA_.
 
global_size_type columnIndexBase_
 Index base of column map of matrixA_.
 
Status status_
 Holds status information about a solver.
 
Control control_
 Parameters for solving.
 
Timers timers_
 Various timing statistics.
 
int rank_
 The MPI rank of this image.
 
bool root_
 If true, then this is the root processor.
 
int nprocs_
 Number of process images in the matrix communicator.
 

Private Member Functions

void loadA (EPhase current_phase)
 Refresh this solver's internal data about A. More...
 

Detailed Description

template<template< class, class > class ConcreteSolver, class Matrix, class Vector>
class Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >

Amesos2::SolverCore: A templated interface for interaction with third-party direct sparse solvers.

Templated core-functionality class for Amesos2 solvers. Definitions.

The Amesos2::SolverCore class is the statically polymorphic parent class of each Amesos2 class named Amesos2_SolverName which interfaces with the third-party solver named SolverName.

Each concrete solver interface implements several private "sub-functions" that are called within common code for that function.

This static base class also provides a convenient way to handle the template parameters and private typedef'ing (with the help of the Matrix and MultiVector adapter classes) of the ordinal and scalar types that can be used elsewhere in the concrete solver code.

Author
Eric T Bavier etbav.nosp@m.ie@s.nosp@m.andia.nosp@m..gov
Date
Thu May 27 14:02:35 CDT 2010

Constructor & Destructor Documentation

template<template< class, class > class ConcreteSolver, class Matrix, class Vector>
Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::SolverCore ( Teuchos::RCP< const Matrix >  A,
Teuchos::RCP< Vector >  X,
Teuchos::RCP< const Vector >  B 
)

Initialize a Solver instance.

A single constructor is supported, which accepts Teuchos::RCP objects that point to a matrix-esque A, and vector-esque LHS object and RHS object B. This is the only constructor used by Amesos2::create.

Exceptions
std::invalid_argumentThe shape of the matrix A is not supported by the underlying solver.

References Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::matrixShapeOK().

Member Function Documentation

template<template< class, class > class ConcreteSolver, class Matrix , class Vector >
Solver< Matrix, Vector > & Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::preOrdering ( void  )
overridevirtual

Pre-orders the matrix A for minimal fill-in.

Rearranges the rows and columns of the matrix A to minimize the amount of fill-in of the non-zero entries of the matrix. Pre-ordering may or may not be supported by the underlying solver. If not supported, a call to this method simply does nothing.

Returns
a reference to this .
See Also
symbolicFactorization(), numericFactorization(), and solve()

Implements Amesos2::Solver< Matrix, Vector >.

template<template< class, class > class ConcreteSolver, class Matrix , class Vector >
Solver< Matrix, Vector > & Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::symbolicFactorization ( void  )
overridevirtual

Performs symbolic factorization on the matrix A.

In addition to performing symbolic factorization on the matrix A, the call to symbolicFactorization() implies that no change will be made to the non-zero structure of the underlying matrix without a subsequent call to symbolicFactorization().

Precondition
Postcondition
Returns
a reference to this .
See Also
preOrdering(), numericFactorization(), and solve()

Implements Amesos2::Solver< Matrix, Vector >.

template<template< class, class > class ConcreteSolver, class Matrix , class Vector >
Solver< Matrix, Vector > & Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::numericFactorization ( void  )
overridevirtual

Performs numeric factorization on the matrix A.

In addition to performing numeric factorization on the matrix A, the call to numericFactorization() implies that no change will be made to the underlying matrix values without a subsequent call to numericFactorization().

Precondition
  • The non-zero structure of the matrix should not have changed since the last call to symbolicFactorization(). Other changes can have arbitrary consequences.
  • The distribution of the matrix should not have changed since the last call to symbolicFactorization().
Postcondition
Numeric factorization will be performed (or marked to be performed) allowing solve() to be performed correctly despite a potential change in the matrix values (though not in the non-zero structure).
Returns
a reference to this
See Also
preOrdering(), symbolicFactorization(), and solve()

Implements Amesos2::Solver< Matrix, Vector >.

template<template< class, class > class ConcreteSolver, class Matrix , class Vector >
void Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::solve ( void  )
overridevirtual

Solves $ A X = B$ (or $ A^T X = B$ )

Precondition
Postcondition
X will be set such that $ A X = B$ (or $ A^T X = B$ ), within the limits of the accuracy of the underlying solver.
Returns
void
See Also
preOrdering(), symbolicFactorization(), and numericFactorization()

Implements Amesos2::Solver< Matrix, Vector >.

template<template< class, class > class ConcreteSolver, class Matrix , class Vector>
void Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::solve ( const Teuchos::Ptr< Vector >  X,
const Teuchos::Ptr< const Vector >  B 
) const
overridevirtual

Solve $ A X = B$ using the given X and B vectors.

This overload of solve uses the given X and B vectors when solving. This X and B are used in place of any X and B that were given upon construction of the Amesos2 solver instance and are used only for this solve.

If a permanent change of X and B are required, see the setX() and setB() methods.

Postcondition
  • The (multi)vector X contains the solution to the system
  • The X and B given at construction time (if any) are unchanged.

Implements Amesos2::Solver< Matrix, Vector >.

References Amesos2::Solver< Matrix, Vector >::numericFactorization().

template<template< class, class > class ConcreteSolver, class Matrix , class Vector>
void Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::solve ( Vector *  X,
const Vector *  B 
) const
overridevirtual

Solve $ A X = B$ using the given X and B vectors.

This overload of solve uses the given X and B vectors when solving. This X and B are used in place of any X and B that were given upon construction of the Amesos2 solver instance and are used only for this solve.

If a permanent change of X and B are required, see the setX() and setB() methods.

Postcondition
  • The (multi)vector X contains the solution to the system
  • The X and B given at construction time (if any) are unchanged.

Implements Amesos2::Solver< Matrix, Vector >.

template<template< class, class > class ConcreteSolver, class Matrix , class Vector >
bool Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::matrixShapeOK ( void  )
overridevirtual

Returns true if the solver can handle this matrix shape.

Returns true if the matrix shape is one that the underlying concrete sparse direct solver can handle. Classes that work only on square matrices should return false for rectangular matrices. Classes that work only on symmetric matrices would return false for non-symmetric matrices. etc.

Implements Amesos2::Solver< Matrix, Vector >.

Referenced by Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::SolverCore().

template<template< class, class > class ConcreteSolver, class Matrix, class Vector >
void Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::setA ( const Teuchos::RCP< const Matrix >  a,
EPhase  keep_phase = CLEAN 
)
overridevirtual

Sets the matrix A of this solver.

Parameters
[in]aAn RCP to a matrix will will be used for future computation steps
[in]keep_phaseThis parameter tells the solver what state it should keep. For example, you may want to replace the matrix but keep the symbolic factorization because you know the structure of the new matrix is the same as the structure of the old matrix. In this case you would pass Amesos2::SYMBFACT as this parameter.

The default value for the second parameter is Amesos2::CLEAN, which means that the internal state of the solver will be completely reset. It will be as if no previous computational steps were performed.

Implements Amesos2::Solver< Matrix, Vector >.

template<template< class, class > class ConcreteSolver, class Matrix, class Vector>
void Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::setA ( const Matrix *  a,
EPhase  keep_phase = CLEAN 
)
inlineoverridevirtual

Sets the matrix A of this solver.

Parameters
[in]aAn raw C pointer to a matrix will will be used for future computation steps.
[in]keep_phaseThis parameter tells the solver what state it should keep. For example, you may want to replace the matrix but keep the symbolic factorization because you know the structure of the new matrix is the same as the structure of the old matrix. In this case you would pass Amesos2::SYMBFACT as this parameter.

The default value for the second parameter is Amesos2::CLEAN, which means that the internal state of the solver will be completely reset. It will be as if no previous computational steps were performed.

Implements Amesos2::Solver< Matrix, Vector >.

Referenced by Amesos2::SolverCore< Amesos2::Umfpack, Matrix, Vector >::setA().

template<template< class, class > class ConcreteSolver, class Matrix , class Vector >
Solver< Matrix, Vector > & Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::setParameters ( const Teuchos::RCP< Teuchos::ParameterList > &  parameterList)
overridevirtual

Set/update internal variables and solver options.

The setParameters method is consistent over all concrete solvers. It accepts general status and control parameters, as well as parameters specific to a given solver. If the solver does not recognize the parameter, then it will simply be ignored

Note
The ParameterList must be named "Amesos2". A list with any other name will be ignored.
Postcondition
  • Internal variables controlling the factorization and solve will be updated and take effect on all subsequent calls to numericFactorization() and solve().
  • All parameters whose value is to differ from the default values must be included in parameterList. Parameters not specified in parameterList revert to their default values.
Returns
a reference to this

Implements Amesos2::Solver< Matrix, Vector >.

Referenced by Amesos2::Lapack< Matrix, Vector >::Lapack(), Amesos2::SolverCore< Amesos2::Umfpack, Matrix, Vector >::setParameterList(), Amesos2::STRUMPACK< Matrix, Vector >::STRUMPACK(), Amesos2::Superludist< Matrix, Vector >::Superludist(), and Amesos2::Superlumt< Matrix, Vector >::Superlumt().

template<template< class, class > class ConcreteSolver, class Matrix , class Vector >
Teuchos::RCP< const Teuchos::ParameterList > Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::getValidParameters ( void  ) const
overridevirtual

Return a const parameter list of all of the valid parameters that this->setParameterList(...) will accept.

Note
Check the documentation for your concrete solver to see a complete list of the values that each parameter may take. A solver may also recognize multiple data types as arguments for a particular parameters (eg. recognizing "YES" and "NO" as well as true and false ).

Implements Amesos2::Solver< Matrix, Vector >.

Referenced by Amesos2::Lapack< Matrix, Vector >::Lapack(), Amesos2::STRUMPACK< Matrix, Vector >::STRUMPACK(), Amesos2::Superludist< Matrix, Vector >::Superludist(), and Amesos2::Superlumt< Matrix, Vector >::Superlumt().

template<template< class, class > class ConcreteSolver, class Matrix, class Vector>
void Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::setParameterList ( const Teuchos::RCP< Teuchos::ParameterList > &  parameterList)
inline

Set or update internal variables and solver options.

Redefined from Teuchos::ParameterListAcceptor

Note
Alias for setParameters()
Parameters
[in]parameterList
template<template< class, class > class ConcreteSolver, class Matrix, class Vector>
Teuchos::RCP<Teuchos::ParameterList> Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::getNonconstParameterList ( )
inline

This is a empty stub.

Returns
template<template< class, class > class ConcreteSolver, class Matrix, class Vector>
Teuchos::RCP<Teuchos::ParameterList> Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::unsetParameterList ( )
inline

This is an empty stub.

Returns
template<template< class, class > class ConcreteSolver, class Matrix , class Vector >
void Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::describe ( Teuchos::FancyOStream &  out,
const Teuchos::EVerbosityLevel  verbLevel = Teuchos::Describable::verbLevel_default 
) const
overridevirtual

Prints the status information about the current solver with some level of verbosity

Implements Amesos2::Solver< Matrix, Vector >.

References Amesos2::Util::printLine().

template<template< class, class > class ConcreteSolver, class Matrix , class Vector >
void Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::printTiming ( Teuchos::FancyOStream &  out,
const Teuchos::EVerbosityLevel  verbLevel 
) const
overridevirtual

Prints timing information about the current solver.

The Amesos2::SolverCore base class takes care of tracking total time spent in the Amesos2 interface. Concrete solver interface class are responsible for reporting other timing statistics, which include time spent in:

  • Redistribution of matrix objects,
  • Conversion of matrix objects to solver-specific formats,
  • Redistribution of multi-vector objects,
  • Conversion of multi-vector objects to solver formats,
  • TPL symbolic factorizations,
  • TPL numeric factorizations, and
  • TPL solves

Implements Amesos2::Solver< Matrix, Vector >.

References Amesos2::Util::printLine().

template<template< class, class > class ConcreteSolver, class Matrix , class Vector >
void Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::getTiming ( Teuchos::ParameterList &  timingParameterList) const
overridevirtual

Extracts timing information from the current solver.

Results are placed into the parameter list timingParameterList.

Parameters
[out]timingParameterListAccepts timing information from the current solver

Implements Amesos2::Solver< Matrix, Vector >.

template<template< class, class > class ConcreteSolver, class Matrix , class Vector >
std::string Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::name ( void  ) const
overridevirtual

Return the name of this solver.

The name is given by the underlying concrete solver instance

Returns
A std::string which is the name of this solver

Implements Amesos2::Solver< Matrix, Vector >.

template<template< class, class > class ConcreteSolver, class Matrix , class Vector >
void Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::loadA ( EPhase  current_phase)
private

Refresh this solver's internal data about A.

Called whenever it would be necessary to refresh a solver's internal storage of the matrix A, which is whenever a phase is called that is equal to or below the current call.

For example, say a user has just previously called solve(), then calls numericFactorization(). Since the solve phase is greater than the numericFactorization phase, this is an indication that the internal store of A needs refreshing, since the user (assuming the user know what she's doing) wouldn't otherwise need to call numericFactorization following a solve.

template<template< class, class > class ConcreteSolver, class Matrix, class Vector>
void Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::setNnzLU ( size_t  nnz)
inlineprotected

Set the number of non-zero values in the $L$ and $U$ factors.

Concrete solver classes may call this method if they wish to (or are able to) report the number of conbined non-zero count for the $L$ and $U$ factors.

Member Data Documentation

template<template< class, class > class ConcreteSolver, class Matrix, class Vector>
bool Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::matrix_loaded_
protected

If true indicates that the current matrix A has been loaded into internal solver structures.

template<template< class, class > class ConcreteSolver, class Matrix, class Vector>
Teuchos::RCP<const Vector> Amesos2::SolverCore< ConcreteSolver, Matrix, Vector >::multiVecB_
protected

The RHS vector/multi-vector.

We point to a const Vector because Amesos2 should never directly modify B.

Referenced by Amesos2::SolverCore< Amesos2::Umfpack, Matrix, Vector >::getB(), Amesos2::SolverCore< Amesos2::Umfpack, Matrix, Vector >::getBRaw(), and Amesos2::SolverCore< Amesos2::Umfpack, Matrix, Vector >::setB().

The documentation for this class was generated from the following files:
Generated on Fri Nov 22 2024 09:16:50 for Amesos2 - Direct Sparse Solver Interfaces by   doxygen 1.8.5