+++ /dev/null
-
-/*
- * Based on a program from James Clippinger (james@cs.dartmouth.edu),
- * http://www.cs.dartmouth.edu/~james/.
- *
- */
-#include "test.h"
-#include <stdlib.h>
-#include <stdio.h>
-#include "mpi.h"
-
-int main( int argc, char **argv )
-{
- MPI_Status status;
- int count, rank, size, dest, source, i, err = 0, toterr;
- long *buf;
-
- /* Initialize MPI and get my rank and total number of
- processors */
-
- MPI_Init(&argc, &argv);
- MPI_Comm_rank(MPI_COMM_WORLD, &rank);
- MPI_Comm_size(MPI_COMM_WORLD, &size);
-
- /* Send-receive-replace the buffer */
- count = 1 << 14;
- buf = (long *)malloc( count * sizeof(long) );
- for (i=0; i<count; i++)
- buf[i] = rank + size*i;
- dest = (rank + 1) % size;
- source = (rank + size - 1) % size;
-
-/*
- fprintf(stderr, "Proc %d: About to SRR, dest proc %d, source proc
-%d\n",
- rank, dest, source);
- */
- MPI_Sendrecv_replace( buf, count, MPI_LONG, dest,
- 1, source, 1, MPI_COMM_WORLD, &status );
-
- for (i=0; i<count; i++) {
- if (buf[i] != source + size*i) {
- if (err++ > 10) break;
- printf( "Received %ld in buf[%d]; expected %d\n",
- buf[i], i, source + size*i );
- }
- }
-/*
- fprintf(stderr, "Done with SRR on proc %d\n", rank);
- */
-
- /* Finalize everything */
- MPI_Allreduce( &err, &toterr, 1, MPI_INT, MPI_SUM, MPI_COMM_WORLD );
- if (rank == 0) {
- if (toterr == 0)
- printf( " No Errors\n" );
- else
- printf( "Test failed with %d errors!\n", toterr );
- }
- free( buf );
-
- MPI_Finalize();
- return 0;
-}