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/* StarPU --- Runtime system for heterogeneous multicore architectures.
*
* Copyright (C) 2012 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.h>
#include <mpi.h>
#define _DISPLAY(fmt, args ...) do { \
int _display_rank; MPI_Comm_rank(MPI_COMM_WORLD, &_display_rank); \
fprintf(stderr, "[%d][%s] " fmt , _display_rank, __func__ ,##args); \
fflush(stderr); } while(0)
/*
* Codelet to create a neutral element
*/
void init_cpu_func(void *descr[], void *cl_arg)
{
long int *dot = (long int *)STARPU_VARIABLE_GET_PTR(descr[0]);
*dot = 0;
_DISPLAY("Init dot\n");
}
/*
* Codelet to perform the reduction of two elements
*/
void redux_cpu_func(void *descr[], void *cl_arg)
{
long int *dota = (long int *)STARPU_VARIABLE_GET_PTR(descr[0]);
long int *dotb = (long int *)STARPU_VARIABLE_GET_PTR(descr[1]);
*dota = *dota + *dotb;
_DISPLAY("Calling redux %ld=%ld+%ld\n", *dota, *dota-*dotb, *dotb);
}
/*
* Dot product codelet
*/
void dot_cpu_func(void *descr[], void *cl_arg)
{
long int *local_x = (long int *)STARPU_VECTOR_GET_PTR(descr[0]);
unsigned n = STARPU_VECTOR_GET_NX(descr[0]);
long int *dot = (long int *)STARPU_VARIABLE_GET_PTR(descr[1]);
// _DISPLAY("Before dot=%ld (adding %d elements...)\n", *dot, n);
unsigned i;
for (i = 0; i < n; i++)
{
// _DISPLAY("Adding %ld\n", local_x[i]);
*dot += local_x[i];
}
// _DISPLAY("After dot=%ld\n", *dot);
}
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