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/*****************************************************************************\
* test1.116.prog.c - Extended ping test of operation with Slurm.
*****************************************************************************
* Copyright (C) 2019 SchedMD LLC.
*
* This file is part of Slurm, a resource management program.
* For details, see <https://slurm.schedmd.com/>.
* Please also read the included file: DISCLAIMER.
*
* Slurm is free software; you can redistribute it and/or modify it under
* the terms of the GNU General Public License as published by the Free
* Software Foundation; either version 2 of the License, or (at your option)
* any later version.
*
* Slurm is distributed in the hope that it will be useful, but WITHOUT ANY
* WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
* FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License along
* with Slurm; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
\*****************************************************************************/
#include <mpi.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <sys/utsname.h>
#define _DEBUG 0
#define ARRAY_LEN 4
int main(int argc, char * argv[])
{
int i;
int size, rank;
int local_sum = 0, global_sum = 0;
int array[ARRAY_LEN];
MPI_Init(&argc, &argv);
MPI_Comm_size(MPI_COMM_WORLD, &size);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
if (rank == 0) {
for (i = 0; i < ARRAY_LEN; i++)
array[i] = rank + i;
}
MPI_Bcast(array, ARRAY_LEN, MPI_INT, 0, MPI_COMM_WORLD);
for (i = 0; i < ARRAY_LEN; i++)
local_sum += array[i];
#if _DEBUG
for (i = 0; i < ARRAY_LEN; i++)
printf("Rank[%d] Array[%d]=%d\n", rank, i, array[i]);
printf("Rank[%d] LocalSum=%d\n", rank, local_sum);
#endif
MPI_Reduce(&local_sum, &global_sum, 1, MPI_INT, MPI_SUM, 0,
MPI_COMM_WORLD);
if (rank == 0)
printf("Rank[%d] GlobalSum=%d\n", rank, global_sum);
MPI_Finalize();
return 0;
}
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