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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpi.h"
#include <stdio.h>
#include <stdlib.h>
#include "mpitest.h"
/*
static char MTEST_Descrip[] = "Test survivability from faults with point to point communication";
*/
int main(int argc, char *argv[])
{
int wrank, wsize, rank, size, color;
int j, tmp;
MPI_Comm newcomm;
MTest_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &wsize);
MPI_Comm_rank(MPI_COMM_WORLD, &wrank);
/* Color is 0 or 1; 1 will be the processes that "fault" */
color = (wrank > 0) && (wrank <= wsize / 2);
MPI_Comm_split(MPI_COMM_WORLD, color, wrank, &newcomm);
MPI_Barrier(MPI_COMM_WORLD);
if (color) {
/* Simulate a fault on some processes */
exit(1);
}
/* Can we still use newcomm? */
MPI_Comm_size(newcomm, &size);
MPI_Comm_rank(newcomm, &rank);
for (j = 0; j < rank; j++) {
MPI_Recv(&tmp, 1, MPI_INT, j, 0, newcomm, MPI_STATUS_IGNORE);
}
for (j = rank + 1; j < size; j++) {
MPI_Send(&rank, 1, MPI_INT, j, 0, newcomm);
}
MPI_Comm_free(&newcomm);
MTest_Finalize(0);
return 0;
}
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