1 //===================================================== 2 // File : action_lu_solve.hh 3 // Author : L. Plagne <laurent.plagne (at) edf.fr)> 4 // Copyright (C) EDF R&D, lun sep 30 14:23:19 CEST 2002 5 //===================================================== 6 // 7 // This program is free software; you can redistribute it and/or 8 // modify it under the terms of the GNU General Public License 9 // as published by the Free Software Foundation; either version 2 10 // of the License, or (at your option) any later version. 11 // 12 // This program is distributed in the hope that it will be useful, 13 // but WITHOUT ANY WARRANTY; without even the implied warranty of 14 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 // GNU General Public License for more details. 16 // You should have received a copy of the GNU General Public License 17 // along with this program; if not, write to the Free Software 18 // Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. 19 // 20 #ifndef ACTION_LU_SOLVE 21 #define ACTION_LU_SOLVE 22 #include "utilities.h" 23 #include "STL_interface.hh" 24 #include <string> 25 #include "init/init_function.hh" 26 #include "init/init_vector.hh" 27 #include "init/init_matrix.hh" 28 29 using namespace std; 30 31 template<class Interface> 32 class Action_lu_solve 33 { 34 35 public : 36 37 static inline std::string name( void ) 38 { 39 return "lu_solve_"+Interface::name(); 40 } 41 42 static double nb_op_base(int size){ 43 return 2.0*size*size*size/3.0; // questionable but not really important 44 } 45 46 47 static double calculate( int nb_calc, int size ) { 48 49 // STL matrix and vector initialization 50 51 typename Interface::stl_matrix A_stl; 52 typename Interface::stl_vector B_stl; 53 typename Interface::stl_vector X_stl; 54 55 init_matrix<pseudo_random>(A_stl,size); 56 init_vector<pseudo_random>(B_stl,size); 57 init_vector<null_function>(X_stl,size); 58 59 // generic matrix and vector initialization 60 61 typename Interface::gene_matrix A; 62 typename Interface::gene_vector B; 63 typename Interface::gene_vector X; 64 65 typename Interface::gene_matrix LU; 66 67 Interface::matrix_from_stl(A,A_stl); 68 Interface::vector_from_stl(B,B_stl); 69 Interface::vector_from_stl(X,X_stl); 70 Interface::matrix_from_stl(LU,A_stl); 71 72 // local variable : 73 74 typename Interface::Pivot_Vector pivot; // pivot vector 75 Interface::new_Pivot_Vector(pivot,size); 76 77 // timer utilities 78 79 Portable_Timer chronos; 80 81 // time measurement 82 83 chronos.start(); 84 85 for (int ii=0;ii<nb_calc;ii++){ 86 87 // LU factorization 88 Interface::copy_matrix(A,LU,size); 89 Interface::LU_factor(LU,pivot,size); 90 91 // LU solve 92 93 Interface::LU_solve(LU,pivot,B,X,size); 94 95 } 96 97 // Time stop 98 99 chronos.stop(); 100 101 double time=chronos.user_time(); 102 103 // check result : 104 105 typename Interface::stl_vector B_new_stl(size); 106 Interface::vector_to_stl(X,X_stl); 107 108 STL_interface<typename Interface::real_type>::matrix_vector_product(A_stl,X_stl,B_new_stl,size); 109 110 typename Interface::real_type error= 111 STL_interface<typename Interface::real_type>::norm_diff(B_stl,B_new_stl); 112 113 if (error>1.e-5){ 114 INFOS("WRONG CALCULATION...residual=" << error); 115 STL_interface<typename Interface::real_type>::display_vector(B_stl); 116 STL_interface<typename Interface::real_type>::display_vector(B_new_stl); 117 exit(0); 118 } 119 120 // deallocation and return time 121 122 Interface::free_matrix(A,size); 123 Interface::free_vector(B); 124 Interface::free_vector(X); 125 Interface::free_Pivot_Vector(pivot); 126 127 return time; 128 } 129 130 }; 131 132 133 #endif 134 135 136 137
