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/* StarPU --- Runtime system for heterogeneous multicore architectures.
*
* Copyright (C) 2009, 2010 Université de Bordeaux 1
* Copyright (C) 2010, 2011 Centre National de la Recherche Scientifique
*
* StarPU is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or (at
* your option) any later version.
*
* StarPU is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* See the GNU Lesser General Public License in COPYING.LGPL for more details.
*/
#include <starpu_mpi.h>
#include <stdlib.h>
#include "helper.h"
#define NITER 2048
#define BIGSIZE 128
#define SIZE 64
int main(int argc, char **argv)
{
int ret, rank, size;
MPI_Init(NULL, NULL);
MPI_Comm_rank(MPI_COMM_WORLD, &rank);
MPI_Comm_size(MPI_COMM_WORLD, &size);
if (size < 2)
{
if (rank == 0)
FPRINTF(stderr, "We need at least processes.\n");
MPI_Finalize();
return STARPU_TEST_SKIPPED;
}
/* We only use 2 nodes for that test */
if (rank >= 2)
{
MPI_Finalize();
return STARPU_TEST_SKIPPED;
}
ret = starpu_init(NULL);
STARPU_CHECK_RETURN_VALUE(ret, "starpu_init");
ret = starpu_mpi_initialize();
STARPU_CHECK_RETURN_VALUE(ret, "starpu_mpi_initialize");
/* Node 0 will allocate a big block and only register an inner part of
* it as the block data, Node 1 will allocate a block of small size and
* register it directly. Node 0 and 1 will then exchange the content of
* their blocks. */
float *block;
starpu_data_handle_t block_handle;
if (rank == 0)
{
block = calloc(BIGSIZE*BIGSIZE*BIGSIZE, sizeof(float));
assert(block);
/* fill the inner block */
unsigned i, j, k;
for (k = 0; k < SIZE; k++)
for (j = 0; j < SIZE; j++)
for (i = 0; i < SIZE; i++)
{
block[i + j*BIGSIZE + k*BIGSIZE*BIGSIZE] = 1.0f;
}
starpu_block_data_register(&block_handle, 0,
(uintptr_t)block, BIGSIZE, BIGSIZE*BIGSIZE,
SIZE, SIZE, SIZE, sizeof(float));
}
else /* rank == 1 */
{
block = calloc(SIZE*SIZE*SIZE, sizeof(float));
assert(block);
starpu_block_data_register(&block_handle, 0,
(uintptr_t)block, SIZE, SIZE*SIZE,
SIZE, SIZE, SIZE, sizeof(float));
}
if (rank == 0)
{
ret = starpu_mpi_send(block_handle, 1, 0x42, MPI_COMM_WORLD);
STARPU_CHECK_RETURN_VALUE(ret, "starpu_mpi_send");
MPI_Status status;
ret = starpu_mpi_recv(block_handle, 1, 0x1337, MPI_COMM_WORLD, &status);
STARPU_CHECK_RETURN_VALUE(ret, "starpu_mpi_recv");
/* check the content of the block */
ret = starpu_data_acquire(block_handle, STARPU_R);
STARPU_CHECK_RETURN_VALUE(ret, "starpu_data_acquire");
unsigned i, j, k;
for (k = 0; k < SIZE; k++)
for (j = 0; j < SIZE; j++)
for (i = 0; i < SIZE; i++)
{
assert(block[i + j*BIGSIZE + k*BIGSIZE*BIGSIZE] == 33.0f);
}
starpu_data_release(block_handle);
}
else /* rank == 1 */
{
MPI_Status status;
ret = starpu_mpi_recv(block_handle, 0, 0x42, MPI_COMM_WORLD, &status);
STARPU_CHECK_RETURN_VALUE(ret, "starpu_mpi_recv");
/* check the content of the block and modify it */
ret = starpu_data_acquire(block_handle, STARPU_RW);
STARPU_CHECK_RETURN_VALUE(ret, "starpu_data_acquire");
unsigned i, j, k;
for (k = 0; k < SIZE; k++)
for (j = 0; j < SIZE; j++)
for (i = 0; i < SIZE; i++)
{
assert(block[i + j*SIZE + k*SIZE*SIZE] == 1.0f);
block[i + j*SIZE + k*SIZE*SIZE] = 33.0f;
}
starpu_data_release(block_handle);
ret = starpu_mpi_send(block_handle, 0, 0x1337, MPI_COMM_WORLD);
STARPU_CHECK_RETURN_VALUE(ret, "starpu_mpi_send");
}
FPRINTF(stdout, "Rank %d is done\n", rank);
fflush(stdout);
starpu_mpi_shutdown();
starpu_shutdown();
MPI_Finalize();
return 0;
}
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