MFEM v4.7.0
Finite element discretization library
Loading...
Searching...
No Matches
mfem::Ginkgo::IRSolver Class Reference

#include <ginkgo.hpp>

Inheritance diagram for mfem::Ginkgo::IRSolver:
[legend]
Collaboration diagram for mfem::Ginkgo::IRSolver:
[legend]

Public Member Functions

 IRSolver (GinkgoExecutor &exec)
 
 IRSolver (GinkgoExecutor &exec, const GinkgoIterativeSolver &inner_solver)
 
- Public Member Functions inherited from mfem::Ginkgo::EnableGinkgoSolver< gko::solver::Ir< real_t > >
 EnableGinkgoSolver (GinkgoExecutor &exec, bool use_implicit_res_norm)
 
void SetRelTol (real_t rtol)
 
void SetAbsTol (real_t atol)
 
void SetMaxIter (int max_it)
 
- Public Member Functions inherited from mfem::Ginkgo::GinkgoIterativeSolver
const std::shared_ptr< gko::LinOpFactory > GetFactory () const
 
void SetPrintLevel (int print_lvl)
 
int GetNumIterations () const
 
int GetConverged () const
 
real_t GetFinalNorm () const
 
virtual void SetOperator (const Operator &op)
 
virtual void Mult (const Vector &x, Vector &y) const
 
bool UsesVectorWrappers () const
 
virtual ~GinkgoIterativeSolver ()=default
 
- Public Member Functions inherited from mfem::Solver
 Solver (int s=0, bool iter_mode=false)
 Initialize a square Solver with size s.
 
 Solver (int h, int w, bool iter_mode=false)
 Initialize a Solver with height h and width w.
 
- Public Member Functions inherited from mfem::Operator
void InitTVectors (const Operator *Po, const Operator *Ri, const Operator *Pi, Vector &x, Vector &b, Vector &X, Vector &B) const
 Initializes memory for true vectors of linear system.
 
 Operator (int s=0)
 Construct a square Operator with given size s (default 0).
 
 Operator (int h, int w)
 Construct an Operator with the given height (output size) and width (input size).
 
int Height () const
 Get the height (size of output) of the Operator. Synonym with NumRows().
 
int NumRows () const
 Get the number of rows (size of output) of the Operator. Synonym with Height().
 
int Width () const
 Get the width (size of input) of the Operator. Synonym with NumCols().
 
int NumCols () const
 Get the number of columns (size of input) of the Operator. Synonym with Width().
 
virtual MemoryClass GetMemoryClass () const
 Return the MemoryClass preferred by the Operator.
 
virtual void MultTranspose (const Vector &x, Vector &y) const
 Action of the transpose operator: y=A^t(x). The default behavior in class Operator is to generate an error.
 
virtual void AddMult (const Vector &x, Vector &y, const real_t a=1.0) const
 Operator application: y+=A(x) (default) or y+=a*A(x).
 
virtual void AddMultTranspose (const Vector &x, Vector &y, const real_t a=1.0) const
 Operator transpose application: y+=A^t(x) (default) or y+=a*A^t(x).
 
virtual void ArrayMult (const Array< const Vector * > &X, Array< Vector * > &Y) const
 Operator application on a matrix: Y=A(X).
 
virtual void ArrayMultTranspose (const Array< const Vector * > &X, Array< Vector * > &Y) const
 Action of the transpose operator on a matrix: Y=A^t(X).
 
virtual void ArrayAddMult (const Array< const Vector * > &X, Array< Vector * > &Y, const real_t a=1.0) const
 Operator application on a matrix: Y+=A(X) (default) or Y+=a*A(X).
 
virtual void ArrayAddMultTranspose (const Array< const Vector * > &X, Array< Vector * > &Y, const real_t a=1.0) const
 Operator transpose application on a matrix: Y+=A^t(X) (default) or Y+=a*A^t(X).
 
virtual OperatorGetGradient (const Vector &x) const
 Evaluate the gradient operator at the point x. The default behavior in class Operator is to generate an error.
 
virtual void AssembleDiagonal (Vector &diag) const
 Computes the diagonal entries into diag. Typically, this operation only makes sense for linear Operators. In some cases, only an approximation of the diagonal is computed.
 
virtual const OperatorGetProlongation () const
 Prolongation operator from linear algebra (linear system) vectors, to input vectors for the operator. NULL means identity.
 
virtual const OperatorGetRestriction () const
 Restriction operator from input vectors for the operator to linear algebra (linear system) vectors. NULL means identity.
 
virtual const OperatorGetOutputProlongation () const
 Prolongation operator from linear algebra (linear system) vectors, to output vectors for the operator. NULL means identity.
 
virtual const OperatorGetOutputRestrictionTranspose () const
 Transpose of GetOutputRestriction, directly available in this form to facilitate matrix-free RAP-type operators.
 
virtual const OperatorGetOutputRestriction () const
 Restriction operator from output vectors for the operator to linear algebra (linear system) vectors. NULL means identity.
 
void FormLinearSystem (const Array< int > &ess_tdof_list, Vector &x, Vector &b, Operator *&A, Vector &X, Vector &B, int copy_interior=0)
 Form a constrained linear system using a matrix-free approach.
 
void FormRectangularLinearSystem (const Array< int > &trial_tdof_list, const Array< int > &test_tdof_list, Vector &x, Vector &b, Operator *&A, Vector &X, Vector &B)
 Form a column-constrained linear system using a matrix-free approach.
 
virtual void RecoverFEMSolution (const Vector &X, const Vector &b, Vector &x)
 Reconstruct a solution vector x (e.g. a GridFunction) from the solution X of a constrained linear system obtained from Operator::FormLinearSystem() or Operator::FormRectangularLinearSystem().
 
void FormSystemOperator (const Array< int > &ess_tdof_list, Operator *&A)
 Return in A a parallel (on truedofs) version of this square operator.
 
void FormRectangularSystemOperator (const Array< int > &trial_tdof_list, const Array< int > &test_tdof_list, Operator *&A)
 Return in A a parallel (on truedofs) version of this rectangular operator (including constraints).
 
void FormDiscreteOperator (Operator *&A)
 Return in A a parallel (on truedofs) version of this rectangular operator.
 
void PrintMatlab (std::ostream &out, int n, int m=0) const
 Prints operator with input size n and output size m in Matlab format.
 
virtual void PrintMatlab (std::ostream &out) const
 Prints operator in Matlab format.
 
virtual ~Operator ()
 Virtual destructor.
 
Type GetType () const
 Return the type ID of the Operator class.
 

Additional Inherited Members

- Public Types inherited from mfem::Operator
enum  DiagonalPolicy { DIAG_ZERO , DIAG_ONE , DIAG_KEEP }
 Defines operator diagonal policy upon elimination of rows and/or columns. More...
 
enum  Type {
  ANY_TYPE , MFEM_SPARSEMAT , Hypre_ParCSR , PETSC_MATAIJ ,
  PETSC_MATIS , PETSC_MATSHELL , PETSC_MATNEST , PETSC_MATHYPRE ,
  PETSC_MATGENERIC , Complex_Operator , MFEM_ComplexSparseMat , Complex_Hypre_ParCSR ,
  Complex_DenseMat , MFEM_Block_Matrix , MFEM_Block_Operator
}
 Enumeration defining IDs for some classes derived from Operator. More...
 
- Public Attributes inherited from mfem::Solver
bool iterative_mode
 If true, use the second argument of Mult() as an initial guess.
 
- Protected Member Functions inherited from mfem::Ginkgo::GinkgoIterativeSolver
 GinkgoIterativeSolver (GinkgoExecutor &exec, bool use_implicit_res_norm)
 
void update_stop_factory ()
 
- Protected Member Functions inherited from mfem::Operator
void FormConstrainedSystemOperator (const Array< int > &ess_tdof_list, ConstrainedOperator *&Aout)
 see FormSystemOperator()
 
void FormRectangularConstrainedSystemOperator (const Array< int > &trial_tdof_list, const Array< int > &test_tdof_list, RectangularConstrainedOperator *&Aout)
 see FormRectangularSystemOperator()
 
OperatorSetupRAP (const Operator *Pi, const Operator *Po)
 Returns RAP Operator of this, using input/output Prolongation matrices Pi corresponds to "P", Po corresponds to "Rt".
 
- Protected Attributes inherited from mfem::Ginkgo::GinkgoIterativeSolver
bool use_implicit_res_norm
 
int print_level
 
int max_iter
 
real_t rel_tol
 
real_t abs_tol
 
real_t final_norm
 
int final_iter
 
int converged
 
std::shared_ptr< gko::LinOpFactory > solver_gen
 
std::shared_ptr< gko::LinOp > solver
 
std::shared_ptr< gko::stop::ResidualNorm<>::Factory > rel_criterion
 
std::shared_ptr< gko::stop::ResidualNorm<>::Factory > abs_criterion
 
std::shared_ptr< gko::stop::ImplicitResidualNorm<>::Factory > imp_rel_criterion
 
std::shared_ptr< gko::stop::ImplicitResidualNorm<>::Factory > imp_abs_criterion
 
std::shared_ptr< gko::log::Convergence<> > convergence_logger
 
std::shared_ptr< ResidualLogger<> > residual_logger
 
std::shared_ptr< gko::stop::Combined::Factory > combined_factory
 
std::shared_ptr< gko::Executor > executor
 
bool needs_wrapped_vecs
 
bool sub_op_needs_wrapped_vecs
 
- Protected Attributes inherited from mfem::Operator
int height
 Dimension of the output / number of rows in the matrix.
 
int width
 Dimension of the input / number of columns in the matrix.
 

Detailed Description

An implementation of the solver interface using the Ginkgo IR solver.

Iterative refinement (IR) is an iterative method that uses another coarse method to approximate the error of the current solution via the current residual.

Definition at line 1129 of file ginkgo.hpp.

Constructor & Destructor Documentation

◆ IRSolver() [1/2]

mfem::Ginkgo::IRSolver::IRSolver ( GinkgoExecutor & exec)

Constructor.

Parameters
[in]execThe execution paradigm for the solver.

Definition at line 1054 of file ginkgo.cpp.

◆ IRSolver() [2/2]

mfem::Ginkgo::IRSolver::IRSolver ( GinkgoExecutor & exec,
const GinkgoIterativeSolver & inner_solver )

Constructor.

Parameters
[in]execThe execution paradigm for the solver.
[in]inner_solverThe inner solver for the main solver.

Definition at line 1062 of file ginkgo.cpp.


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