| //===================================================== |
| // File : action_lu_solve.hh |
| // Author : L. Plagne <laurent.plagne@edf.fr)> |
| // Copyright (C) EDF R&D, lun sep 30 14:23:19 CEST 2002 |
| //===================================================== |
| // |
| // 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_LU_SOLVE |
| #define ACTION_LU_SOLVE |
| #include "utilities.h" |
| #include "STL_interface.hh" |
| #include <string> |
| #include "init/init_function.hh" |
| #include "init/init_vector.hh" |
| #include "init/init_matrix.hh" |
| |
| using namespace std; |
| |
| template<class Interface> |
| class Action_lu_solve |
| { |
| |
| public : |
| |
| static inline std::string name( void ) |
| { |
| return "lu_solve_"+Interface::name(); |
| } |
| |
| static double nb_op_base(int size){ |
| return 2.0*size*size*size/3.0; // questionable but not really important |
| } |
| |
| |
| static double calculate( int nb_calc, int size ) { |
| |
| // STL matrix and vector initialization |
| |
| typename Interface::stl_matrix A_stl; |
| typename Interface::stl_vector B_stl; |
| typename Interface::stl_vector X_stl; |
| |
| init_matrix<pseudo_random>(A_stl,size); |
| init_vector<pseudo_random>(B_stl,size); |
| init_vector<null_function>(X_stl,size); |
| |
| // generic matrix and vector initialization |
| |
| typename Interface::gene_matrix A; |
| typename Interface::gene_vector B; |
| typename Interface::gene_vector X; |
| |
| typename Interface::gene_matrix LU; |
| |
| Interface::matrix_from_stl(A,A_stl); |
| Interface::vector_from_stl(B,B_stl); |
| Interface::vector_from_stl(X,X_stl); |
| Interface::matrix_from_stl(LU,A_stl); |
| |
| // local variable : |
| |
| typename Interface::Pivot_Vector pivot; // pivot vector |
| Interface::new_Pivot_Vector(pivot,size); |
| |
| // timer utilities |
| |
| Portable_Timer chronos; |
| |
| // time measurement |
| |
| chronos.start(); |
| |
| for (int ii=0;ii<nb_calc;ii++){ |
| |
| // LU factorization |
| Interface::copy_matrix(A,LU,size); |
| Interface::LU_factor(LU,pivot,size); |
| |
| // LU solve |
| |
| Interface::LU_solve(LU,pivot,B,X,size); |
| |
| } |
| |
| // Time stop |
| |
| chronos.stop(); |
| |
| double time=chronos.user_time(); |
| |
| // check result : |
| |
| typename Interface::stl_vector B_new_stl(size); |
| Interface::vector_to_stl(X,X_stl); |
| |
| STL_interface<typename Interface::real_type>::matrix_vector_product(A_stl,X_stl,B_new_stl,size); |
| |
| typename Interface::real_type error= |
| STL_interface<typename Interface::real_type>::norm_diff(B_stl,B_new_stl); |
| |
| if (error>1.e-5){ |
| INFOS("WRONG CALCULATION...residual=" << error); |
| STL_interface<typename Interface::real_type>::display_vector(B_stl); |
| STL_interface<typename Interface::real_type>::display_vector(B_new_stl); |
| exit(0); |
| } |
| |
| // deallocation and return time |
| |
| Interface::free_matrix(A,size); |
| Interface::free_vector(B); |
| Interface::free_vector(X); |
| Interface::free_Pivot_Vector(pivot); |
| |
| return time; |
| } |
| |
| }; |
| |
| |
| #endif |
| |
| |
| |