KmlScaissCgFactorize?I

Interface Definition

C interface:

int KmlScaissCgFactorizeSI(KmlScasolverTask **handle);

int KmlScaissCgFactorizeDI(KmlScasolverTask **handle);

Parameters

Return Value

Dependencies

#include "kml_scaiss.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 ID.

int n = 8 / size;
int n_beg = n * rank;
if (n * size != 8 && rank == (size - 1)) {
    n = 8 - n * rank;
}
int ja[26] = { 0, 3, 4, 1, 2, 3, 5, 1, 2, 7, 0, 1, 3, 6, 0, 4, 5, 1, 4, 5, 7, 3, 6, 2, 5, 7 };
double a[26] = { 1.0, 1.0, 2.0, 9.0, 2.0, 1.0, -3.0, 2.0, 3.0, 2.0, 1.0, 1.0, 9.0, -5.0, 2.0, 6.0, 1.0, -3.0, 1.0, 4.0, 1.0, -5.0, 2.0, 1.0, 2.0 };
int ia[9] = { 0, 3, 7, 10, 14, 17, 21, 23, 26 };
int a_beg = ia[n_beg];
for (int i = n_beg; i < 9; i++) {
    ia[i] -= a_beg;
}

/* Internal KML_SCAISS structure */
KmlScasolverTask *handle;

/* KML_SCAISS control parameters */
int nrhs = 1;         /* Number of right-hand sides */
int ldx = 8, ldb = 8; /*!Leading dimension of B and X */
int error;            /* Output error handle */

/* Create data structures */
const double *a_holder = &a[a_beg];
const int *ja_holder = &ja[a_beg];
const int *ia_holder = &ia[n_beg];
error = KmlScaissCgInitStripesDI(&handle, 8, 1, &n, &n_beg, &a_holder, &ja_holder, &ia_holder, MPI_COMM_WORLD);

ierr = KmlScaissCgAnalyzeDI(&handle);
ierr = KmlScaissCgFactorizeDI(&handle);
if (error != 0) {
    printf("\nERROR in KmlScaissCgFactorizeDI: %d", error);
    return 1;
    }