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/*
* Copyright (C) 2010. See COPYRIGHT in top-level directory.
*/
#include <stdio.h>
#include <stdlib.h>
#include <mpi.h>
#if defined(__CRAYXT) || defined(__CRAYXE) || defined(__CRAYXC) || defined(__CRAYXT_COMPUTE_LINUX_TARGET)
#define NUM_WIN 300 // Cray MPI supports ~900 accordig to Nathan...
#else
#define NUM_WIN 1000 // Error starts at 17. Up to 16 is ok.
#endif
#define DATA_NELTS 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 windows[NUM_WIN];
MPI_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &nproc);
if (rank == 0) printf("Starting MPI window creation test with %d processes\n", nproc);
// Perform a pile of window creations
for (i = 0; i < NUM_WIN; i++) {
if (rank == 0) printf(" + Creating window %d\n", i);
MPI_Alloc_mem(DATA_SZ, MPI_INFO_NULL, &base_ptrs[i]);
MPI_Win_create(base_ptrs[i], DATA_SZ, 1, MPI_INFO_NULL, MPI_COMM_WORLD, &windows[i]);
}
MPI_Barrier(MPI_COMM_WORLD);
// Free all the windows
for (i = 0; i < NUM_WIN; i++) {
if (rank == 0) printf(" + Freeing window %d\n", i);
MPI_Win_free(&windows[i]);
MPI_Free_mem(base_ptrs[i]);
}
if (rank == 0) printf("Test complete: PASS.\n");
MPI_Finalize();
return 0;
}
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