1 // -*- C++ -*- 2 // 3 // Copyright (C) 2009-2019 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the 7 // terms of the GNU General Public License as published by the 8 // Free Software Foundation; either version 3, or (at your option) 9 // any later version. 10 // 11 // This library is distributed in the hope that it will be useful, 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 // GNU General Public License for more details. 15 16 // Under Section 7 of GPL version 3, you are granted additional 17 // permissions described in the GCC Runtime Library Exception, version 18 // 3.1, as published by the Free Software Foundation. 19 20 // You should have received a copy of the GNU General Public License along 21 // with this library; see the file COPYING3. If not see 22 // <http://www.gnu.org/licenses/>. 23 24 /** @file profile/impl/profiler_list_to_vector.h 25 * @brief diagnostics for list to vector. 26 */ 27 28 // Written by Changhee Jung. 29 30 #ifndef _GLIBCXX_PROFILE_PROFILER_LIST_TO_VECTOR_H 31 #define _GLIBCXX_PROFILE_PROFILER_LIST_TO_VECTOR_H 1 32 33 #include <sstream> 34 35 #include "profile/impl/profiler.h" 36 #include "profile/impl/profiler_node.h" 37 #include "profile/impl/profiler_trace.h" 38 39 namespace __gnu_profile 40 { 41 /** @brief A list-to-vector instrumentation line in the object table. */ 42 class __list2vector_info 43 : public __object_info_base 44 { 45 public: 46 __list2vector_info(__stack_t __stack) 47 : __object_info_base(__stack), _M_shift_count(0), _M_iterate(0), 48 _M_resize(0), _M_list_cost(0), _M_vector_cost(0), 49 _M_max_size(0) { } 50 51 void 52 __merge(const __list2vector_info& __o) 53 { 54 __object_info_base::__merge(__o); 55 _M_shift_count += __o._M_shift_count; 56 _M_iterate += __o._M_iterate; 57 _M_vector_cost += __o._M_vector_cost; 58 _M_list_cost += __o._M_list_cost; 59 _M_resize += __o._M_resize; 60 _M_max_size = std::max( _M_max_size, __o._M_max_size); 61 } 62 63 void 64 __write(FILE* __f) const 65 { 66 std::fprintf(__f, "%Zu %Zu %Zu %.0f %.0f\n", _M_shift_count, 67 _M_resize, _M_iterate, _M_vector_cost, _M_list_cost); 68 } 69 70 float 71 __magnitude() const 72 { return _M_list_cost - _M_vector_cost; } 73 74 std::string 75 __advice() const 76 { 77 std::stringstream __sstream; 78 __sstream 79 << "change std::list to std::vector and its initial size from 0 to " 80 << _M_max_size; 81 return __sstream.str(); 82 } 83 84 std::size_t 85 __shift_count() 86 { return _M_shift_count; } 87 88 std::size_t 89 __iterate() 90 { return _M_iterate; } 91 92 float 93 __list_cost() 94 { return _M_list_cost; } 95 96 std::size_t 97 __resize() 98 { return _M_resize; } 99 100 void 101 __set_list_cost(float __lc) 102 { _M_list_cost = __lc; } 103 104 void 105 __set_vector_cost(float __vc) 106 { _M_vector_cost = __vc; } 107 108 void 109 __opr_insert(std::size_t __shift, std::size_t __size) 110 { 111 _M_shift_count += __shift; 112 _M_max_size = std::max(_M_max_size, __size); 113 } 114 115 void 116 __opr_iterate(int __num) 117 { __gnu_cxx::__atomic_add(&_M_iterate, __num); } 118 119 void 120 __resize(std::size_t __from, std::size_t) 121 { _M_resize += __from; } 122 123 private: 124 std::size_t _M_shift_count; 125 mutable _Atomic_word _M_iterate; 126 std::size_t _M_resize; 127 float _M_list_cost; 128 float _M_vector_cost; 129 std::size_t _M_max_size; 130 }; 131 132 class __list2vector_stack_info 133 : public __list2vector_info 134 { 135 public: 136 __list2vector_stack_info(const __list2vector_info& __o) 137 : __list2vector_info(__o) {} 138 }; 139 140 class __trace_list_to_vector 141 : public __trace_base<__list2vector_info, __list2vector_stack_info> 142 { 143 public: 144 __trace_list_to_vector() 145 : __trace_base<__list2vector_info, __list2vector_stack_info>() 146 { __id = "list-to-vector"; } 147 148 ~__trace_list_to_vector() { } 149 150 // Call at destruction/clean to set container final size. 151 void 152 __destruct(__list2vector_info* __obj_info) 153 { 154 float __vc = __vector_cost(__obj_info->__shift_count(), 155 __obj_info->__iterate()); 156 float __lc = __list_cost(__obj_info->__shift_count(), 157 __obj_info->__iterate()); 158 __obj_info->__set_vector_cost(__vc); 159 __obj_info->__set_list_cost(__lc); 160 __retire_object(__obj_info); 161 } 162 163 // Collect cost of operations. 164 float 165 __vector_cost(std::size_t __shift, std::size_t __iterate) 166 { 167 // The resulting vector will use a 'reserve' method. 168 return (__shift 169 * _GLIBCXX_PROFILE_DATA(__vector_shift_cost_factor).__value 170 + __iterate 171 * _GLIBCXX_PROFILE_DATA(__vector_iterate_cost_factor).__value); 172 } 173 174 float 175 __list_cost(std::size_t __shift, std::size_t __iterate) 176 { 177 return (__shift 178 * _GLIBCXX_PROFILE_DATA(__list_shift_cost_factor).__value 179 + __iterate 180 * _GLIBCXX_PROFILE_DATA(__list_iterate_cost_factor).__value); 181 } 182 }; 183 184 185 inline void 186 __trace_list_to_vector_init() 187 { _GLIBCXX_PROFILE_DATA(_S_list_to_vector) = new __trace_list_to_vector(); } 188 189 inline void 190 __trace_list_to_vector_free() 191 { delete _GLIBCXX_PROFILE_DATA(_S_list_to_vector); } 192 193 inline void 194 __trace_list_to_vector_report(FILE* __f, __warning_vector_t& __warnings) 195 { __trace_report(_GLIBCXX_PROFILE_DATA(_S_list_to_vector), __f, __warnings); } 196 197 inline __list2vector_info* 198 __trace_list_to_vector_construct() 199 { 200 if (!__profcxx_init()) 201 return 0; 202 203 if (!__reentrance_guard::__get_in()) 204 return 0; 205 206 __reentrance_guard __get_out; 207 return _GLIBCXX_PROFILE_DATA(_S_list_to_vector) 208 ->__add_object(__get_stack()); 209 } 210 211 inline void 212 __trace_list_to_vector_insert(__list2vector_info* __obj_info, 213 std::size_t __shift, std::size_t __size) 214 { 215 if (!__obj_info) 216 return; 217 218 __obj_info->__opr_insert(__shift, __size); 219 } 220 221 inline void 222 __trace_list_to_vector_iterate(__list2vector_info* __obj_info, 223 int) 224 { 225 if (!__obj_info) 226 return; 227 228 // We only collect if an iteration took place no matter in what side. 229 __obj_info->__opr_iterate(1); 230 } 231 232 inline void 233 __trace_list_to_vector_invalid_operator(__list2vector_info* __obj_info) 234 { 235 if (!__obj_info) 236 return; 237 238 __obj_info->__set_invalid(); 239 } 240 241 inline void 242 __trace_list_to_vector_resize(__list2vector_info* __obj_info, 243 std::size_t __from, std::size_t __to) 244 { 245 if (!__obj_info) 246 return; 247 248 __obj_info->__resize(__from, __to); 249 } 250 251 inline void 252 __trace_list_to_vector_destruct(__list2vector_info* __obj_info) 253 { 254 if (!__obj_info) 255 return; 256 257 _GLIBCXX_PROFILE_DATA(_S_list_to_vector)->__destruct(__obj_info); 258 } 259 260 } // namespace __gnu_profile 261 #endif /* _GLIBCXX_PROFILE_PROFILER_LIST_TO_VECTOR_H__ */ 262
Indexes created Wed Sep 16 00:24:39 UTC 2026