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Opm::Accelerator::amgclSolverBackend< Scalar, block_size > Class Template Reference

This class does not implement a solver, but converts the BCSR format to normal CSR and uses amgcl for solving Note amgcl also implements blocked solvers, but looks like it needs unblocked input data. More...

#include <amgclSolverBackend.hpp>

Inheritance diagram for Opm::Accelerator::amgclSolverBackend< Scalar, block_size >:
Opm::Accelerator::BdaSolver< Scalar, block_size >

Public Member Functions

 amgclSolverBackend (int linear_solver_verbosity, int maxit, Scalar tolerance, unsigned int platformID, unsigned int deviceID)
 Construct an amgcl solver.
 
 ~amgclSolverBackend ()
 Destroy a openclSolver, and free memory.
 
SolverStatus solve_system (std::shared_ptr< BlockedMatrix< Scalar > > matrix, Scalar *b, std::shared_ptr< BlockedMatrix< Scalar > > jacMatrix, WellContributions< Scalar > &wellContribs, BdaResult &res) override
 Solve linear system, A*x = b, matrix A must be in blocked-CSR format.
 
void get_result (Scalar *x) override
 Get result after linear solve, and peform postprocessing if necessary.
 
- Public Member Functions inherited from Opm::Accelerator::BdaSolver< Scalar, block_size >
 BdaSolver (int linear_solver_verbosity, int max_it, Scalar tolerance_)
 Construct a BdaSolver.
 
 BdaSolver (int linear_solver_verbosity, int max_it, Scalar tolerance_, unsigned int deviceID_)
 
 BdaSolver (int linear_solver_verbosity, int max_it, double tolerance_, unsigned int platformID_, unsigned int deviceID_)
 
virtual ~BdaSolver ()=default
 Define virtual destructor, so that the derivedclass destructor will be called.
 

Additional Inherited Members

- Protected Attributes inherited from Opm::Accelerator::BdaSolver< Scalar, block_size >
int verbosity = 0
 
int maxit = 200
 
Scalar tolerance = 1e-2
 
int N
 
int Nb
 
int nnz
 
int nnzb
 
unsigned int platformID = 0
 
unsigned int deviceID = 0
 
bool initialized = false
 

Detailed Description

template<class Scalar, unsigned int block_size>
class Opm::Accelerator::amgclSolverBackend< Scalar, block_size >

This class does not implement a solver, but converts the BCSR format to normal CSR and uses amgcl for solving Note amgcl also implements blocked solvers, but looks like it needs unblocked input data.

Constructor & Destructor Documentation

◆ amgclSolverBackend()

template<class Scalar , unsigned int block_size>
Opm::Accelerator::amgclSolverBackend< Scalar, block_size >::amgclSolverBackend ( int  linear_solver_verbosity,
int  maxit,
Scalar  tolerance,
unsigned int  platformID,
unsigned int  deviceID 
)

Construct an amgcl solver.

Parameters
[in]linear_solver_verbosityverbosity of amgclSolver
[in]maxitmaximum number of iterations for amgclSolver
[in]tolerancerequired relative tolerance for amgclSolver
[in]platformIDthe OpenCL platform to be used
[in]deviceIDthe device to be used

Member Function Documentation

◆ get_result()

template<class Scalar , unsigned int block_size>
void Opm::Accelerator::amgclSolverBackend< Scalar, block_size >::get_result ( Scalar *  x)
overridevirtual

Get result after linear solve, and peform postprocessing if necessary.

Parameters
[in,out]xresulting x vector, caller must guarantee that x points to a valid array

Implements Opm::Accelerator::BdaSolver< Scalar, block_size >.

◆ solve_system()

template<class Scalar , unsigned int block_size>
SolverStatus Opm::Accelerator::amgclSolverBackend< Scalar, block_size >::solve_system ( std::shared_ptr< BlockedMatrix< Scalar > >  matrix,
Scalar *  b,
std::shared_ptr< BlockedMatrix< Scalar > >  jacMatrix,
WellContributions< Scalar > &  wellContribs,
BdaResult res 
)
overridevirtual

Solve linear system, A*x = b, matrix A must be in blocked-CSR format.

Parameters
[in]matrixmatrix A
[in]binput vector, contains N values
[in]jacMatrixmatrix for preconditioner
[in]wellContribsWellContributions, to apply them separately, instead of adding them to matrix A
[in,out]ressummary of solver result
Returns
status code

Implements Opm::Accelerator::BdaSolver< Scalar, block_size >.


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