Opm::Accelerator::FpgaSolverBackend< block_size > Class Template Reference

This class implements an ilu0-bicgstab solver on FPGA. More...

#include <FPGASolverBackend.hpp>

Inheritance diagram for Opm::Accelerator::FpgaSolverBackend< block_size >:

Public Member Functions
	FpgaSolverBackend (std::string fpga_bitstream, int linear_solver_verbosity, int maxit, double tolerance, ILUReorder opencl_ilu_reorder)
	Construct an fpgaSolver. More...
	~FpgaSolverBackend ()
	Destroy an fpgaSolver, and free memory.
SolverStatus	solve_system (std::shared_ptr< BlockedMatrix > matrix, double *b, std::shared_ptr< BlockedMatrix > jacMatrix, WellContributions &wellContribs, BdaResult &res) override
	Solve linear system, A*x = b, matrix A must be in blocked-CSR format. More...
void	get_result (double *x) override
	Get result after linear solve, and peform postprocessing if necessary. More...
Public Member Functions inherited from Opm::Accelerator::BdaSolver< block_size >
	BdaSolver (int linear_solver_verbosity, int max_it, double tolerance_)
	Construct a BdaSolver, can be cusparseSolver, openclSolver, fpgaSolver. More...
	BdaSolver (int linear_solver_verbosity, int max_it, double tolerance_, unsigned int deviceID_)
	BdaSolver (int linear_solver_verbosity, int max_it, double tolerance_, unsigned int platformID_, unsigned int deviceID_)
	BdaSolver (std::string fpga_bitstream, int linear_solver_verbosity, int max_it, double tolerance_)
virtual	~BdaSolver ()
	Define virtual destructor, so that the derivedclass destructor will be called.
virtual SolverStatus	solve_system (std::shared_ptr< BlockedMatrix > matrix, double *b, std::shared_ptr< BlockedMatrix > jacMatrix, WellContributions &wellContribs, BdaResult &res)=0
	Define as pure virtual functions, so derivedclass must implement them. More...
virtual void	get_result (double *x)=0

Additional Inherited Members
Protected Attributes inherited from Opm::Accelerator::BdaSolver< block_size >
int	verbosity = 0
int	maxit = 200
double	tolerance = 1e-2
std::string	bitstream
int	N
int	Nb
int	nnz
int	nnzb
unsigned int	platformID = 0
unsigned int	deviceID = 0
bool	initialized = false

Detailed Description

template<unsigned int block_size>
class Opm::Accelerator::FpgaSolverBackend< block_size >

This class implements an ilu0-bicgstab solver on FPGA.

Constructor & Destructor Documentation

FpgaSolverBackend()

template<unsigned int block_size>

Opm::Accelerator::FpgaSolverBackend< block_size >::FpgaSolverBackend	(	std::string	fpga_bitstream,
		int	linear_solver_verbosity,
		int	maxit,
		double	tolerance,
		ILUReorder	opencl_ilu_reorder
	)

Construct an fpgaSolver.

Parameters

[in]	fpga_bitstream	FPGA bitstream file name
[in]	linear_solver_verbosity	verbosity of fpgaSolver
[in]	maxit	maximum number of iterations for fpgaSolver
[in]	tolerance	required relative tolerance for fpgaSolver
[in]	opencl_ilu_reorder	select either level_scheduling or graph_coloring, see ILUReorder.hpp for explanation

Member Function Documentation

get_result()

template<unsigned int block_size>

void Opm::Accelerator::FpgaSolverBackend< block_size >::get_result ( double *  x )

overridevirtual

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

Parameters

[in,out]

x

resulting x vector, caller must guarantee that x points to a valid array

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

solve_system()

template<unsigned int block_size>

SolverStatus Opm::Accelerator::FpgaSolverBackend< block_size >::solve_system ( std::shared_ptr< BlockedMatrix >  matrix, double *  b, std::shared_ptr< BlockedMatrix >  jacMatrix, WellContributions &  wellContribs, BdaResult &  res  )

overridevirtual

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

Parameters

[in]	matrix	matrix A
[in]	b	input vector, contains N values
[in]	jacMatrix	matrix for preconditioner
[in]	wellContribs	WellContributions, not used in FPGA solver because it requires them already added to matrix A
[in,out]	res	summary of solver result

Returns

status code

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

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

• opm/simulators/linalg/bda/FPGASolverBackend.hpp
• opm/simulators/linalg/bda/FPGASolverBackend.cpp