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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
#include "mpi.h"
#include <stdio.h>
#include <stdlib.h>
#include "mpitest.h"
/*
static char MTEST_Descrip[] = "Test that freed datatypes have reference count semantics";
*/
#define VEC_NELM 128
#define VEC_STRIDE 8
int main(int argc, char *argv[])
{
int errs = 0;
int rank, size, source, dest, i;
MPI_Comm comm;
MPI_Status status;
MPI_Request req;
MPI_Datatype strideType;
MPI_Datatype tmpType[1024];
int *buf = 0;
MTest_Init(&argc, &argv);
comm = MPI_COMM_WORLD;
MPI_Comm_rank(comm, &rank);
MPI_Comm_size(comm, &size);
if (size < 2) {
fprintf(stderr, "This test requires at least two processes.");
MPI_Abort(MPI_COMM_WORLD, 1);
}
source = 0;
dest = size - 1;
/*
* The idea here is to create a simple but non-contig datatype,
* perform an irecv with it, free it, and then create
* many new datatypes. While not a complete test, if the datatype
* was freed and the space was reused, this test may detect
* that error
* A similar test for sends might work by sending a large enough message
* to force the use of rendezvous send.
*/
MPI_Type_vector(VEC_NELM, 1, VEC_STRIDE, MPI_INT, &strideType);
MPI_Type_commit(&strideType);
if (rank == dest) {
buf = (int *) malloc(VEC_NELM * VEC_STRIDE * sizeof(int));
for (i = 0; i < VEC_NELM * VEC_STRIDE; i++)
buf[i] = -i;
MPI_Irecv(buf, 1, strideType, source, 0, comm, &req);
MPI_Type_free(&strideType);
for (i = 0; i < 1024; i++) {
MPI_Type_vector(VEC_NELM, 1, 1, MPI_INT, &tmpType[i]);
MPI_Type_commit(&tmpType[i]);
}
MPI_Sendrecv(NULL, 0, MPI_INT, source, 1, NULL, 0, MPI_INT, source, 1, comm, &status);
MPI_Wait(&req, &status);
for (i = 0; i < VEC_NELM; i++) {
if (buf[VEC_STRIDE * i] != i) {
errs++;
if (errs < 10) {
printf("buf[%d] = %d, expected %d\n", VEC_STRIDE * i, buf[VEC_STRIDE * i], i);
}
}
}
for (i = 0; i < 1024; i++) {
MPI_Type_free(&tmpType[i]);
}
free(buf);
} else if (rank == source) {
buf = (int *) malloc(VEC_NELM * sizeof(int));
for (i = 0; i < VEC_NELM; i++)
buf[i] = i;
/* Synchronize with the receiver */
MPI_Sendrecv(NULL, 0, MPI_INT, dest, 1, NULL, 0, MPI_INT, dest, 1, comm, &status);
MPI_Send(buf, VEC_NELM, MPI_INT, dest, 0, comm);
free(buf);
}
/* Clean up the strideType */
if (rank != dest) {
MPI_Type_free(&strideType);
}
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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