KmlScadss(SPD/HPD)Init?I

Initialize the data structure and associate a user-provided coefficient matrix with the solver system. The upper triangular part of the matrix in CSR format is used when the LL^T or LL^H method for multi-process environments is initialized.

Interface Definition

C interfaces:

int KmlScadssSpdInitSI(KmlScasolverTask **pHandle, int n, float *a, int *ja, int *ia, MPI_Comm comm);

int KmlScadssSpdInitDI(KmlScasolverTask **pHandle, int n, double *a, int *ja, int *ia, MPI_Comm comm);

int KmlScadssHpdInitCI(KmlScasolverTask **pHandle, int n, kml_complex_float *a, int *ja, int *ia, MPI_Comm comm);

int KmlScadssHpdInitZI(KmlScasolverTask **pHandle, int n, kml_complex_double *a, int *ja, int *ia, MPI_Comm comm);

Parameters

Parameter	Type	Description	Input/Output
pHandle	KmlScasolverTask **	Solver handle. pHandle cannot be a null pointer.	Output
n	int	Dimension of matrix A.	Input
a	float * in KmlScadssSpdInitSI double * in KmlScadssSpdInitDI kml_complex_float * in KmlScadssHpdInitCI kml_complex_double * in KmlScadssHpdInitZI	Array whose dimension is the quantity of non-zero elements. a[i] is the value of the i-th non-zero element. The lifecycle of this array is the same as that of pHandle.	Input
ja	int	Array whose dimension is the quantity of non-zero elements. ja[i] is the column number of the i-th non-zero element. The lifecycle of this array is the same as that of pHandle.	Input
ia	int	(n+1)-dimensional array. ia[i] is the index of the first non-zero element in the i-th row in all non-zero elements. The lifecycle of this array is the same as that of pHandle.	Input
comm	MPI_Comm	Communicator of the MPI process.	Input

Return Value

Return Value	Type	Description
KMLSS_NO_ERROR	int	The execution is successful.
KMLSS_NULL_ARGUMENT	int	A null parameter exists in {pHandle, a, ja, ia}.
KMLSS_BAD_N	int	The input matrix dimension is less than or equal to 0.
KMLSS_NO_MEMORY	int	Memory allocation failed.

Dependencies

#include "kml_scadss.h"

Examples

C interface:

MPI_Init(NULL, NULL);
int size, rank;
MPI_Comm_size(MPI_COMM_WORLD, &size);// Obtain the total number of processes.
MPI_Comm_rank(MPI_COMM_WORLD, &rank);// Obtain the current process rank.

int n = 8;
int ia[9] = {0, 3, 7, 9, 11, 13, 15, 16, 17};
int ja[17] = {0, 3, 4, 1, 2, 3, 5, 2, 7, 3, 6, 4, 5, 5, 7, 6, 7};
double a[17] = {1.0, 1.0, 2.0, 9.0, 2.0, 1.0, -3.0, 3.0, 2.0, 9.0, -5.0, 6.0, 1.0, 4.0, 1.0, 7.0, 2.0};
KmlScasolverTask* matrix_handle = NULL;
int ierr = KmlScadssSpdInitDI(&matrix_handle, n, a, ja, ia, MPI_COMM_WORLD);
if (ierr != 0) {
    printf("\nERROR in KmlScadssSpdInitDI: %d", ierr);
}

Parent topic: SCADSS-LLT/LLH (DEPRECATED)