KmlScaissBicgstabClean?I
释放内部数据结构。
接口定义
C Interface:
int KmlScaissBicgstabCleanSI(KmlScaSolverTask **handle);
int KmlScaissBicgstabCleanDI(KmlScaSolverTask **handle);
参数
参数名 |
类型 |
描述 |
输入/输出 |
---|---|---|---|
handle |
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 |
handle为空参数。 |
依赖
#include "kml_scaiss.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 mat_size = 8; int n = mat_size / size; int n_beg = n * rank; if (n * size != mat_size && rank == (size - 1)) { n = mat_size - 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, 7.0, 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 < (n_beg + n + 1); i++) { ia[i] -= a_beg; } /* Internal KML_SCAISS structure */ KmlScasolverTask *handle; /* KML_SCAISS control parameters */ 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 = KmlScaissBicgstabInitStripesDI(&handle, mat_size, 1, &n, &n_beg, &a_holder, &ja_holder, &ia_holder, MPI_COMM_WORLD); double eps = 1e-4; error = KmlScaissBicgstabSetDID(&handle, KMLSS_THRESHOLD, &eps, 1); if (error != 0) { printf("\nERROR in KmlScaissBicgstabSetDID with KMLSS_THRESHOLD: %d", error); return 1; } int max_iters = 2000; error = KmlScaissBicgstabSetDII(&handle, KMLSS_MAX_ITERATION_COUNT, &max_iters, 1); if (error != 0) { printf("\nERROR in KmlScaissBicgstabSetDII with KMLSS_MAX_ITERATION_COUNT: %d", error); return 1; } int precond = KMLSS_BJACOBI; error = KmlScaissBicgstabSetDII(&handle, KMLSS_PRECONDITIONER_TYPE, &precond, 1); if (error != 0) { printf("\nERROR in KmlScaissBicgstabSetDII with KMLSS_PRECONDITIONER_TYPE: %d", error); return 1; } int num_blocks = 1; error = KmlScaissBicgstabPcSetDII(&handle, KMLSS_NUM_BLOCKS, &num_blocks, 1); if (error != 0) { printf("ERROR in KmlScaissBicgstabPcSetDII: %d\n", error); return 1; } int subprecond = KMLSS_ILU; error = KmlScaissBicgstabPcSetDII(&handle, KMLSS_BLOCK_METHOD, &subprecond, 1); if (error != 0) { printf("ERROR in KmlScaissBicgstabPcSetDII: %d\n", error); return 1; } error = KmlScaissBicgstabAnalyzeDI(&handle); if (error != 0) { printf("ERROR in KmlScaissBicgstabAnalyzeDI: %d\n", error); return 1; } error = KmlScaissBicgstabFactorizeDI(&handle); if (error != 0) { printf("ERROR in KmlScaissBicgstabFactorizeDI: %d\n", error); return 1; } int nrhs = 1; int ldx = n, ldb = n; double b[8] = { 4.0, 9.0, 7.0, 6.0, 9.0, 3.0, 2.0, 5.0 }; double x[8] = { 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0 }; error = KmlScaissBicgstabSolveDxDI(&handle, nrhs, &x[n_beg], ldx, &b[n_beg], ldb); if (error != 0) { printf("ERROR in KmlScaissBicgstabSolveDI: %d\n", error); return 1; } int idata[] = {0}; error = KmlScaissBicgstabGetDII(&handle, KMLSS_ITERATION_COUNT, idata, 1); if (error != 0) { printf("\nERROR in KmlScaissBicgstabGetDII: %d", error); return 1; } double ddata[] = {0.0}; error = KmlScaissBicgstabGetDID(&handle, KMLSS_TOLERANCE, ddata, 1); if (error != 0) { printf("\nERROR in KmlScaissBicgstabGetDID: %d", error); return 1; } if (rank == 0) printf("[Solve info] Res= \t%.12g\t, iteration = \t%d\t\n", sqrt(ddata[0]), idata[0]); error = KmlScaissBicgstabCleanDI(&handle); if (error != 0) { printf("\nERROR in KmlScaissBicgstabCleanDI: %d", error); return 1; }
父主题: SCAISS-BICGSTAB