Iterative solvers

Set of iterative solvers. More...

Functions
int	starsh_itersolvers__dcg_omp (STARSH_blrm *matrix, int nrhs, double *B, int ldb, double *X, int ldx, double tol, double *work)
	Conjugate gradient method for STARSH_blrm object. More...
int	starsh_itersolvers__dcg_mpi (STARSH_blrm *matrix, int nrhs, double *B, int ldb, double *X, int ldx, double tol, double *work)
	Conjugate gradient method for STARSH_blrm object on MPI nodes. More...

Detailed Description

Set of iterative solvers.

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Function Documentation

starsh_itersolvers__dcg_mpi()

int starsh_itersolvers__dcg_mpi	(	STARSH_blrm *	matrix,
		int	nrhs,
		double *	B,
		int	ldb,
		double *	X,
		int	ldx,
		double	tol,
		double *	work
	)

Conjugate gradient method for STARSH_blrm object on MPI nodes.

Parameters

[in]	matrix	Block-wise low-rank matrix.
[in]	nrhs	Number of right havd sides.
[in]	B	Right hand side.
[in]	ldb	Leading dimension of B.
[in,out]	X	Initial solution as input, total solution as output.
[in]	ldx	Leading dimension of X.
[in]	tol	Relative error threshold for residual.
[out]	work	Temporary array of size 3*n.

Returns

Number of iterations or -1 if not converged.

starsh_itersolvers__dcg_omp()

int starsh_itersolvers__dcg_omp	(	STARSH_blrm *	matrix,
		int	nrhs,
		double *	B,
		int	ldb,
		double *	X,
		int	ldx,
		double	tol,
		double *	work
	)

Conjugate gradient method for STARSH_blrm object.

Parameters

[in]	matrix	Block-wise low-rank matrix.
[in]	nrhs	Number of right havd sides.
[in]	B	Right hand side.
[in]	ldb	Leading dimension of B.
[in,out]	X	Initial solution as input, total solution as output.
[in]	ldx	Leading dimension of X.
[in]	tol	Relative error threshold for residual.
[out]	work	Temporary array of size 3*n.

Returns

Number of iterations or -1 if not converged.