/*
* Test of reduce scatter.
- *
- * Each processor contributes its rank + the index to the reduction,
- * then receives the ith sum
- *
+ * Each processor contributes its rank + the index to the reduction, then receives the ith sum
* Can be called with any number of processors.
*/
int size, rank, i, sumval;
MPI_Comm comm;
-
MPI_Init( &argc, &argv );
comm = MPI_COMM_WORLD;
MPI_Comm_rank( comm, &rank );
sendbuf = (int *) malloc( size * sizeof(int) );
for (i=0; i<size; i++)
- sendbuf[i] = rank + i;
+ sendbuf[i] = rank + i;
recvcounts = (int *)malloc( size * sizeof(int) );
recvbuf = (int *)malloc( size * sizeof(int) );
for (i=0; i<size; i++)
- recvcounts[i] = 1;
+ recvcounts[i] = 1;
MPI_Reduce_scatter( sendbuf, recvbuf, recvcounts, MPI_INT, MPI_SUM, comm );
sumval = size * rank + ((size - 1) * size)/2;
-/* recvbuf should be size * (rank + i) */
+ /* recvbuf should be size * (rank + i) */
if (recvbuf[0] != sumval) {
- err++;
- fprintf( stdout, "Did not get expected value for reduce scatter\n" );
- fprintf( stdout, "[%d] Got %d expected %d\n", rank, recvbuf[0], sumval );
+ err++;
+ fprintf( stdout, "Did not get expected value for reduce scatter\n" );
+ fprintf( stdout, "[%d] Got %d expected %d\n", rank, recvbuf[0], sumval );
}
MPI_Allreduce( &err, &toterr, 1, MPI_INT, MPI_SUM, MPI_COMM_WORLD );
if (rank == 0 && toterr == 0) {
- printf( " No Errors\n" );
+ printf( " No Errors\n" );
}
free(sendbuf);
free(recvcounts);
free(recvbuf);
-
- MPI_Finalize( );
+
+ MPI_Finalize();
return toterr;
}