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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[] = "A simple test of MPI_Reduce_local";
*/
#define MAX_BUF_ELEMENTS (65000)
static int uop_errs = 0;
/* prototype to keep the compiler happy */
static void user_op(void *invec, void *inoutvec, int *len, MPI_Datatype * datatype);
static void user_op(void *invec, void *inoutvec, int *len, MPI_Datatype * datatype)
{
int i;
int *invec_int = (int *) invec;
int *inoutvec_int = (int *) inoutvec;
if (*datatype != MPI_INT) {
++uop_errs;
printf("invalid datatype passed to user_op");
return;
}
for (i = 0; i < *len; ++i) {
inoutvec_int[i] = invec_int[i] * 2 + inoutvec_int[i];
}
}
int main(int argc, char *argv[])
{
int errs = 0;
int i;
int *inbuf = NULL;
int *inoutbuf = NULL;
int count = -1;
MPI_Op uop = MPI_OP_NULL;
MTest_Init(&argc, &argv);
#if MTEST_HAVE_MIN_MPI_VERSION(2,2)
/* this function was added in MPI-2.2 */
inbuf = malloc(sizeof(int) * MAX_BUF_ELEMENTS);
inoutbuf = malloc(sizeof(int) * MAX_BUF_ELEMENTS);
for (count = 0; count < MAX_BUF_ELEMENTS; count > 0 ? count *= 2 : count++) {
for (i = 0; i < count; ++i) {
inbuf[i] = i;
inoutbuf[i] = i;
}
MPI_Reduce_local(inbuf, inoutbuf, count, MPI_INT, MPI_SUM);
for (i = 0; i < count; ++i)
if (inbuf[i] != i) {
++errs;
if (inoutbuf[i] != (2 * i))
++errs;
}
}
/* make sure that user-define ops work too */
MPI_Op_create(&user_op, 0 /*!commute */ , &uop);
for (count = 0; count < MAX_BUF_ELEMENTS; count > 0 ? count *= 2 : count++) {
for (i = 0; i < count; ++i) {
inbuf[i] = i;
inoutbuf[i] = i;
}
MPI_Reduce_local(inbuf, inoutbuf, count, MPI_INT, uop);
errs += uop_errs;
for (i = 0; i < count; ++i)
if (inbuf[i] != i) {
++errs;
if (inoutbuf[i] != (3 * i))
++errs;
}
}
MPI_Op_free(&uop);
free(inbuf);
free(inoutbuf);
#endif
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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