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//=====================================================
// Copyright (C) 2011 Andrea Arteaga <andyspiros@gmail.com>
//=====================================================
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program 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 General Public License for more details.
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//
#ifndef ACTION_PARALLEL_LU_DECOMP_HH_
#define ACTION_PARALLEL_LU_DECOMP_HH_
#include "utilities.h"
#include "init/init_function.hh"
#include "init/init_vector.hh"
#include "lapack_interface.hh"
#include "STL_interface.hh"
#include <string>
template<class Interface>
class Action_parallel_lu_decomp {
public :
// Constructor
BTL_DONT_INLINE Action_parallel_lu_decomp( int size ) : _size(size)
{
MESSAGE("Action_parallel_lu_decomp Ctor");
int myid, procnum;
blacs_pinfo_(&myid, &procnum);
iamroot = (myid == 0);
// STL matrix and vector initialization
if (iamroot) {
/* Using a constant seed */
const unsigned seed = 3;
init_matrix(Global_A_stl, size, seed);
}
const int blocksize = std::max(std::min(size/4, 64), 2);
scatter_matrix(Global_A_stl, Local_A_stl, desc, size, size, blocksize, blocksize);
LocalRows = desc[8];
LocalCols = Local_A_stl.size()/desc[8];
// Generic local matrix and vectors initialization
Interface::matrix_from_stl(Local_A , Local_A_stl);
_cost = 2.0*size*size*size/3.0 + static_cast<double>(size*size);
}
// Invalidate copy constructor
Action_parallel_lu_decomp(const Action_parallel_lu_decomp&)
{
INFOS("illegal call to Action_parallel_lu_decomp copy constructor");
exit(1);
}
// Destructor
~Action_parallel_lu_decomp()
{
MESSAGE("Action_parallel_lu_decomp destructor");
// Deallocation
Interface::free_matrix(Local_A , Local_A_stl.size());
}
// Action name
static inline std::string name()
{
return "lu_decomp_" + Interface::name();
}
double nb_op_base()
{
return _cost;
}
BTL_DONT_INLINE void initialize()
{
}
BTL_DONT_INLINE void calculate()
{
Interface::copy_matrix(&Local_A_stl[0], Local_A, Local_A_stl.size());
Interface::parallel_lu_decomp(Local_A, ipiv_stl, desc);
}
BTL_DONT_INLINE void check_result()
{
// /* Gather */
// typename Interface::stl_matrix Global_Y;
// typename Interface::stl_matrix Local_Y(Local_A_stl.size());
// Interface::matrix_to_stl(Local_A, Local_Y);
// Interface::gather_matrix(Global_Y, Local_Y, desc);
//
// if (iamroot) {
//
// typename Interface::gene_matrix A;
// Interface::matrix_from_stl(A, Global_A_stl);
// lapack_interface<typename Interface::real_type>::lu_decomp(&Global_A_stl[0], A, _size);
// typename Interface::stl_vector correct(A, A+_size*_size);
// typename Interface::real_type error = STL_interface<typename Interface::real_type>::norm_diff(Global_Y, correct);
// if (error > 10e-5)
// cerr << " { !! error : " << error << " !! } ";
//
// Interface::free_matrix(A, _size*_size);
// }
// if (_size > 2) {
// double error = Interface::test_LU(Global_A_stl, Local_A, desc);
// if (iamroot)
// cout << " {error: " << error << "} ";
// }
}
private:
int _size, desc[9], LocalRows, LocalCols;
double _cost;
bool iamroot;
typename Interface::stl_matrix Global_A_stl;
typename Interface::stl_matrix Local_A_stl;
typename Interface::gene_matrix Local_A;
std::vector<int> ipiv_stl;
};
#endif /* ACTION_PARALLEL_LU_DECOMP_HH_ */
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