1 /* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
3 * (C) 2001 by Argonne National Laboratory.
4 * See COPYRIGHT in top-level directory.
11 /* transposes a matrix using put, fence, and derived datatypes. Uses
12 vector and hvector (Example 3.32 from MPI 1.1 Standard). Run on
18 int main(int argc, char *argv[])
20 int rank, nprocs, **A, *A_data, i, j;
23 MPI_Datatype column, xpose;
26 MTest_Init(&argc,&argv);
27 MPI_Comm_size(MPI_COMM_WORLD,&nprocs);
28 MPI_Comm_rank(MPI_COMM_WORLD,&rank);
31 printf("Run this program with 2 or more processes\n");
32 MPI_Abort(MPI_COMM_WORLD, 1);
35 MPI_Comm_split(MPI_COMM_WORLD, (rank < 2), rank, &CommDeuce);
38 A_data = (int *) malloc(NROWS * NCOLS * sizeof(int));
39 A = (int **) malloc(NROWS * sizeof(int *));
42 for (i=1; i<NROWS; i++)
43 A[i] = A[i-1] + NCOLS;
47 for (i=0; i<NROWS; i++)
48 for (j=0; j<NCOLS; j++)
49 A[i][j] = i*NCOLS + j;
51 /* create datatype for one column */
52 MPI_Type_vector(NROWS, 1, NCOLS, MPI_INT, &column);
53 /* create datatype for matrix in column-major order */
54 MPI_Type_hvector(NCOLS, 1, sizeof(int), column, &xpose);
55 MPI_Type_commit(&xpose);
57 MPI_Win_create(NULL, 0, 1, MPI_INFO_NULL, CommDeuce, &win);
59 MPI_Win_fence(0, win);
61 MPI_Put(&A[0][0], NROWS*NCOLS, MPI_INT, 1, 0, 1, xpose, win);
63 MPI_Type_free(&column);
64 MPI_Type_free(&xpose);
66 MPI_Win_fence(0, win);
70 for (i=0; i<NROWS; i++)
71 for (j=0; j<NCOLS; j++)
73 MPI_Win_create(&A[0][0], NROWS*NCOLS*sizeof(int), sizeof(int), MPI_INFO_NULL, CommDeuce, &win);
74 MPI_Win_fence(0, win);
76 MPI_Win_fence(0, win);
78 for (j=0; j<NCOLS; j++)
80 for (i=0; i<NROWS; i++)
82 if (A[j][i] != i*NCOLS + j)
86 printf("Error: A[%d][%d]=%d should be %d\n", j, i,
87 A[j][i], i*NCOLS + j);
95 printf("Total number of errors: %d\n", errs);
105 MPI_Comm_free(&CommDeuce);
106 MTest_Finalize(errs);