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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include <stdio.h>
#include <stdlib.h>
#include <mpi.h>
#include "mpitest.h"
#define DATA_NELTS 1000
#define NUM_WIN 1000
#define DATA_SZ (DATA_NELTS*sizeof(int))
int main(int argc, char **argv)
{
int rank, nproc, i;
void *base_ptrs[NUM_WIN];
MPI_Win window;
MTest_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &nproc);
if (rank == 0)
MTestPrintfMsg(1, "Starting MPI dynamic window attach test with %d processes\n", nproc);
MPI_Info info = MPI_INFO_NULL;
#ifdef USE_INFO_COLL_ATTACH
MPI_Info_create(&info);
MPI_Info_set(info, "coll_attach", "true");
#endif
MPI_Win_create_dynamic(info, MPI_COMM_WORLD, &window);
#ifdef USE_INFO_COLL_ATTACH
MPI_Info_free(&info);
#endif
for (i = 0; i < NUM_WIN; i++) {
MPI_Alloc_mem(DATA_SZ, MPI_INFO_NULL, &base_ptrs[i]);
if (rank == 0)
MTestPrintfMsg(1, " + Attaching segment %d to window\n", i);
MPI_Win_attach(window, base_ptrs[i], DATA_SZ);
}
MPI_Barrier(MPI_COMM_WORLD);
for (i = 0; i < NUM_WIN; i++) {
if (rank == 0)
MTestPrintfMsg(1, " + Detaching segment %d to window\n", i);
MPI_Win_detach(window, base_ptrs[i]);
MPI_Free_mem(base_ptrs[i]);
}
MPI_Win_free(&window);
MTest_Finalize(0);
return 0;
}
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