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/*
* Copyright (C) by Argonne National Laboratory
* See COPYRIGHT in top-level directory
*/
/* One-Sided MPI 2-D Strided Put Test
*
* Author: James Dinan <dinan@mcs.anl.gov>
* Date : March, 2011
*
* This code performs N strided put operations into a 2d patch of a shared
* array. The array has dimensions [X, Y] and the subarray has dimensions
* [SUB_X, SUB_Y] and begins at index [0, 0]. The input and output buffers are
* specified using an MPI datatype.
*
* This test generates a datatype that is relative to an arbitrary base address
* in memory and tests the RMA implementation's ability to perform the correct
* transfer.
*/
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <mpi.h>
#include "mpitest.h"
#include "squelch.h"
#define XDIM 1024
#define YDIM 1024
#define SUB_XDIM 1024
#define SUB_YDIM 1024
#define ITERATIONS 10
int main(int argc, char **argv)
{
int i, j, rank, nranks, peer, bufsize, errs;
double *win_buf, *src_buf, *dst_buf;
MPI_Win buf_win;
MTest_Init(&argc, &argv);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &nranks);
bufsize = XDIM * YDIM * sizeof(double);
MPI_Alloc_mem(bufsize, MPI_INFO_NULL, &win_buf);
/* Alloc_mem is not required for the origin buffers for RMA operations -
* just for the Win_create memory */
MPI_Alloc_mem(bufsize, MPI_INFO_NULL, &src_buf);
MPI_Alloc_mem(bufsize, MPI_INFO_NULL, &dst_buf);
for (i = 0; i < XDIM * YDIM; i++) {
*(win_buf + i) = 1.0 + rank;
*(src_buf + i) = 1.0 + rank;
}
MPI_Win_create(win_buf, bufsize, 1, MPI_INFO_NULL, MPI_COMM_WORLD, &buf_win);
peer = (rank + 1) % nranks;
/* Perform ITERATIONS strided put operations */
for (i = 0; i < ITERATIONS; i++) {
MPI_Aint idx_loc[SUB_YDIM];
int idx_rem[SUB_YDIM];
int blk_len[SUB_YDIM];
MPI_Datatype src_type, dst_type;
void *base_ptr = dst_buf;
MPI_Aint base_int;
MPI_Get_address(base_ptr, &base_int);
for (j = 0; j < SUB_YDIM; j++) {
MPI_Get_address(&src_buf[j * XDIM], &idx_loc[j]);
idx_loc[j] = idx_loc[j] - base_int;
idx_rem[j] = j * XDIM * sizeof(double);
blk_len[j] = SUB_XDIM * sizeof(double);
}
MPI_Type_create_hindexed(SUB_YDIM, blk_len, idx_loc, MPI_BYTE, &src_type);
MPI_Type_create_indexed_block(SUB_YDIM, SUB_XDIM * sizeof(double), idx_rem, MPI_BYTE,
&dst_type);
MPI_Type_commit(&src_type);
MPI_Type_commit(&dst_type);
MPI_Win_lock(MPI_LOCK_EXCLUSIVE, peer, 0, buf_win);
MPI_Put(base_ptr, 1, src_type, peer, 0, 1, dst_type, buf_win);
MPI_Win_unlock(peer, buf_win);
MPI_Type_free(&src_type);
MPI_Type_free(&dst_type);
}
MPI_Barrier(MPI_COMM_WORLD);
/* Verify that the results are correct */
MPI_Win_lock(MPI_LOCK_EXCLUSIVE, rank, 0, buf_win);
errs = 0;
for (i = 0; i < SUB_XDIM; i++) {
for (j = 0; j < SUB_YDIM; j++) {
const double actual = *(win_buf + i + j * XDIM);
const double expected = (1.0 + ((rank + nranks - 1) % nranks));
if (actual - expected > 1e-10) {
SQUELCH(printf("%d: Data validation failed at [%d, %d] expected=%f actual=%f\n",
rank, j, i, expected, actual););
errs++;
fflush(stdout);
}
}
}
for (i = SUB_XDIM; i < XDIM; i++) {
for (j = 0; j < SUB_YDIM; j++) {
const double actual = *(win_buf + i + j * XDIM);
const double expected = 1.0 + rank;
if (actual - expected > 1e-10) {
SQUELCH(printf("%d: Data validation failed at [%d, %d] expected=%f actual=%f\n",
rank, j, i, expected, actual););
errs++;
fflush(stdout);
}
}
}
for (i = 0; i < XDIM; i++) {
for (j = SUB_YDIM; j < YDIM; j++) {
const double actual = *(win_buf + i + j * XDIM);
const double expected = 1.0 + rank;
if (actual - expected > 1e-10) {
SQUELCH(printf("%d: Data validation failed at [%d, %d] expected=%f actual=%f\n",
rank, j, i, expected, actual););
errs++;
fflush(stdout);
}
}
}
MPI_Win_unlock(rank, buf_win);
MPI_Win_free(&buf_win);
MPI_Free_mem(win_buf);
MPI_Free_mem(src_buf);
MPI_Free_mem(dst_buf);
MTest_Finalize(errs);
return MTestReturnValue(errs);
}
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