int main(int argc, char *argv[])
{
- int rank, size, i;
- MPI_Datatype type, type2;
- int blocklen[3] = { 2, 3, 1 };
- int displacement[3] = { 0, 3, 8 };
- int buffer[27];
- MPI_Status status;
-
- MPI_Init(&argc, &argv);
- MPI_Comm_size(MPI_COMM_WORLD, &size);
- if (size < 2) {
- printf("Please run with 2 processes.\n");
- MPI_Finalize();
- return 1;
- }
- MPI_Comm_rank(MPI_COMM_WORLD, &rank);
-
- MPI_Type_contiguous(3, MPI_INT, &type2);
- MPI_Type_commit(&type2);
- MPI_Type_indexed(3, blocklen, displacement, type2, &type);
- MPI_Type_commit(&type);
-
- if (rank == 0) {
- for (i=0; i<27; i++)
- buffer[i] = i;
- MPI_Send(buffer, 1, type, 1, 123, MPI_COMM_WORLD);
- }
-
- if (rank == 1) {
- for (i=0; i<27; i++)
- buffer[i] = -1;
- MPI_Recv(buffer, 1, type, 0, 123, MPI_COMM_WORLD, &status);
- for (i=0; i<27; i++)
- printf("buffer[%d] = %d\n", i, buffer[i]);
- fflush(stdout);
- }
-
- MPI_Type_free(&type);
- MPI_Type_free(&type2);
+ int rank;
+ int size;
+ MPI_Datatype type;
+ MPI_Datatype type2;
+ int blocklen[3] = {2, 3, 1};
+ int displacement[3] = {0, 3, 8};
+ int buffer[27];
+ MPI_Status status;
+
+ MPI_Init(&argc, &argv);
+ MPI_Comm_size(MPI_COMM_WORLD, &size);
+ if (size < 2) {
+ printf("Please run with 2 processes.\n");
MPI_Finalize();
- return 0;
+ return 1;
+ }
+ MPI_Comm_rank(MPI_COMM_WORLD, &rank);
+
+ MPI_Type_contiguous(3, MPI_INT, &type2);
+ MPI_Type_commit(&type2);
+ MPI_Type_indexed(3, blocklen, displacement, type2, &type);
+ MPI_Type_commit(&type);
+
+ if (rank == 0) {
+ for (int i = 0; i < 27; i++)
+ buffer[i] = i;
+ MPI_Send(buffer, 1, type, 1, 123, MPI_COMM_WORLD);
+ }
+
+ if (rank == 1) {
+ for (int i = 0; i < 27; i++)
+ buffer[i] = -1;
+ MPI_Recv(buffer, 1, type, 0, 123, MPI_COMM_WORLD, &status);
+ for (int i = 0; i < 27; i++)
+ printf("buffer[%d] = %d\n", i, buffer[i]);
+ fflush(stdout);
+ }
+
+ MPI_Type_free(&type);
+ MPI_Type_free(&type2);
+ MPI_Finalize();
+ return 0;
}
-
