* (C) 2001 by Argonne National Laboratory.
* See COPYRIGHT in top-level directory.
*/
-/*
+/*
* Test of reduce scatter.
*
- * Each processor contributes its rank + the index to the reduction,
+ * 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>
+#include "mpicolltest.h"
-int main( int argc, char **argv )
+int main(int argc, char **argv)
{
- int err = 0, toterr;
- int *sendbuf, recvbuf, *recvcounts;
- int size, rank, i, sumval;
+ int err = 0, toterr;
+ int *sendbuf, recvbuf, *recvcounts;
+ int size, rank, i, sumval;
MPI_Comm comm;
- MPI_Init( &argc, &argv );
+ 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) );
- for (i=0; i<size; i++)
- recvcounts[i] = 1;
+ 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));
+ for (i = 0; i < size; i++)
+ recvcounts[i] = 1;
- MPI_Reduce_scatter( sendbuf, &recvbuf, recvcounts, MPI_INT, MPI_SUM, comm );
+ MTest_Reduce_scatter(sendbuf, &recvbuf, recvcounts, MPI_INT, MPI_SUM, comm);
- sumval = size * rank + ((size - 1) * size)/2;
+ sumval = size * rank + ((size - 1) * size) / 2;
/* recvbuf should be size * (rank + i) */
if (recvbuf != sumval) {
- err++;
- fprintf( stdout, "Did not get expected value for reduce scatter\n" );
- fprintf( stdout, "[%d] Got %d expected %d\n", rank, recvbuf, sumval );
+ err++;
+ fprintf(stdout, "Did not get expected value for reduce scatter\n");
+ fprintf(stdout, "[%d] Got %d expected %d\n", rank, recvbuf, sumval);
}
- MPI_Allreduce( &err, &toterr, 1, MPI_INT, MPI_SUM, MPI_COMM_WORLD );
+ 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");
}
- MPI_Finalize( );
+
+ free(sendbuf);
+ free(recvcounts);
+ MPI_Finalize();
return toterr;
}