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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <mpi.h>
#include "mpitest.h"
#define ELEM_PER_PROC 10000
const int verbose = 0;
int main(int argc, char **argv)
{
int i, j, rank, nproc;
int shm_rank, shm_nproc;
MPI_Aint size;
int errors = 0;
int *base, *my_base;
int disp_unit;
MPI_Win shm_win;
MPI_Comm shm_comm;
MTest_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &nproc);
MPI_Comm_split_type(MPI_COMM_WORLD, MPI_COMM_TYPE_SHARED, rank, MPI_INFO_NULL, &shm_comm);
MPI_Comm_rank(shm_comm, &shm_rank);
MPI_Comm_size(shm_comm, &shm_nproc);
/* Allocate ELEM_PER_PROC integers for each process */
MPI_Win_allocate_shared(sizeof(int) * ELEM_PER_PROC, sizeof(int), MPI_INFO_NULL,
shm_comm, &my_base, &shm_win);
/* Locate absolute base */
MPI_Win_shared_query(shm_win, MPI_PROC_NULL, &size, &disp_unit, &base);
/* make sure the query returned the right values */
if (disp_unit != sizeof(int))
errors++;
if (size != ELEM_PER_PROC * sizeof(int))
errors++;
if ((shm_rank == 0) && (base != my_base))
errors++;
if (shm_rank && (base == my_base))
errors++;
if (verbose)
printf("%d -- size = %d baseptr = %p my_baseptr = %p\n", shm_rank,
(int) size, (void *) base, (void *) my_base);
MPI_Win_lock_all(MPI_MODE_NOCHECK, shm_win);
/* Write to all my data */
for (i = 0; i < ELEM_PER_PROC; i++) {
my_base[i] = i;
}
MPI_Win_sync(shm_win);
MPI_Barrier(shm_comm);
MPI_Win_sync(shm_win);
/* Read and verify everyone's data */
for (i = 0; i < shm_nproc; i++) {
for (j = 0; j < ELEM_PER_PROC; j++) {
if (base[i * ELEM_PER_PROC + j] != j) {
errors++;
printf("%d -- Got %d at rank %d index %d, expected %d\n", shm_rank,
base[i * ELEM_PER_PROC + j], i, j, j);
}
}
}
MPI_Win_unlock_all(shm_win);
MPI_Win_free(&shm_win);
MPI_Comm_free(&shm_comm);
MTest_Finalize(errors);
return MTestReturnValue(errors);
}
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