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/*
* Copyright (C) 2010. See COPYRIGHT in top-level directory.
*/
/** ARMCI Mutex RMW Test -- James Dinan <dinan@mcs.anl.gov>
*
* A mutex and shared integer live on process 0. All processes lock, add a
* value to the integer, and unlock. Process 0 confirms the final result.
*/
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>
#include <mpi.h>
#include <armci.h>
#define NITER 1000
#define ADDIN 5
int main(int argc, char ** argv) {
int rank, nproc, val, i;
void **base_ptrs;
MPI_Init(&argc, &argv);
ARMCI_Init();
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &nproc);
if (rank == 0) printf("Starting ARMCI mutex read-modify-write test with %d processes\n", nproc);
base_ptrs = malloc(nproc*sizeof(void*));
ARMCI_Create_mutexes(rank == 0 ? 1 : 0);
ARMCI_Malloc(base_ptrs, (rank == 0) ? sizeof(int) : 0); // Proc 0 has a shared int
if (rank == 0) {
val = 0;
ARMCI_Put(&val, base_ptrs[0], sizeof(int), 0);
}
ARMCI_Barrier();
for (i = 0; i < NITER; i++) {
ARMCI_Lock(0, 0);
ARMCI_Get(base_ptrs[0], &val, sizeof(int), 0);
val += ADDIN;
ARMCI_Put(&val, base_ptrs[0], sizeof(int), 0);
ARMCI_Unlock(0, 0);
}
printf(" + %3d done\n", rank);
fflush(NULL);
ARMCI_Barrier();
if (rank == 0) {
ARMCI_Get(base_ptrs[0], &val, sizeof(int), 0);
if (val == ADDIN*nproc*NITER)
printf("Test complete: PASS.\n");
else
printf("Test complete: FAIL. Got %d, expected %d.\n", val, ADDIN*nproc*NITER);
}
ARMCI_Free(base_ptrs[rank]);
ARMCI_Destroy_mutexes();
free(base_ptrs);
ARMCI_Finalize();
MPI_Finalize();
return 0;
}
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