+++ /dev/null
-/* Copyright (c) 2013-2014. The SimGrid Team.
- * All rights reserved. */
-
-/* This program is free software; you can redistribute it and/or modify it
- * under the terms of the license (GNU LGPL) which comes with this package. */
-
-/*
- * Test of reduce scatter.
- *
- * Each processor contributes its rank + the index to the reduction,
- * then receives the ith sum
- *
- * Can be called with any number of processors.
- */
-
-#include "mpi.h"
-#include <stdio.h>
-#include <stdlib.h>
-
-int main( int argc, char **argv )
-{
- int err = 0, toterr;
- int *sendbuf, *recvbuf, *recvcounts;
- int size, rank, i, sumval;
- MPI_Comm comm;
-
-
- MPI_Init( &argc, &argv );
- comm = MPI_COMM_WORLD;
-
- MPI_Comm_size( comm, &size );
- MPI_Comm_rank( comm, &rank );
- sendbuf = (int *) malloc( size * sizeof(int) );
- for (i=0; i<size; 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;
- MPI_Reduce_scatter( sendbuf, recvbuf, recvcounts, MPI_INT, MPI_SUM, comm );
- sumval = size * rank + ((size - 1) * size)/2;
-/* 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 );
- }
-
- MPI_Allreduce( &err, &toterr, 1, MPI_INT, MPI_SUM, MPI_COMM_WORLD );
- if (rank == 0 && toterr == 0) {
- printf( " No Errors\n" );
- }
- free(sendbuf);
- free(recvcounts);
- free(recvbuf);
-
- MPI_Finalize( );
-
- return toterr;
-}