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KmlScadssGENInit?I

初始化数据结构,并将用户提供的系数矩阵关联到求解系统中,初始化集群版的LU方法时使用上三角的CSR格式。

接口定义

C Interface:

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

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

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

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

参数

参数名

类型

描述

输入/输出

pHandle

KmlScasolverTask **

求解器句柄,传入之前步骤的变量。

输入/输出

返回值

返回值

类型

描述

KMLSS_NO_ERROR

int

正常执行。

KMLSS_NULL_ARGUMENT

int

无效的参数。

KMLSS_BAD_HANDLE

int

pHandle格式存在问题。

依赖

#include "kml_scadss.h"

示例

C Interface:

MPI_Init(NULL, NULL);
int size, rank;
MPI_Comm_size(MPI_COMM_WORLD, &size);//获取总进程数
MPI_Comm_rank(MPI_COMM_WORLD, &rank);//获取当前进程标识

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};
double b[8] = {4.0, 9.0, 7.0, 6.0, 9.0, 3.0, 2.0, 5.0};
double x[8];
KmlScasolverTask* matrix_handle = NULL;
int ierr = KmlScadssGenInitDI(&matrix_handle, n, a, ja, ia, MPI_COMM_WORLD);
ierr = KmlScadssGenAnalyzeDI(&matrix_handle);
ierr = KmlScadssGenFactorizeDI(&matrix_handle);
int nrhs = 1;
int ldx=n, ldb=n;
ierr = KmlScadssGenSolveDI(&matrix_handle, nrhs, x, ldx, b, ldb);
ierr = KmlScadssGenCleanDI(&matrix_handle);
if (ierr != 0) {
    printf("\nERROR in KmlScadssGencleanDI: %d", ierr);
}