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profiler_map_to_unordered_map.h
// -*- C++ -*- // // Copyright (C) 2009-2018 Free Software Foundation, Inc. // // This file is part of the GNU ISO C++ Library. This library 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 3, or (at your option) // any later version. // // This library 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. // Under Section 7 of GPL version 3, you are granted additional // permissions described in the GCC Runtime Library Exception, version // 3.1, as published by the Free Software Foundation. // You should have received a copy of the GNU General Public License along // with this library; see the file COPYING3. If not see // <http://www.gnu.org/licenses/>. /** @file profile/impl/profiler_map_to_unordered_map.h * @brief Diagnostics for map to unordered_map. */ // Written by Silvius Rus. #ifndef _GLIBCXX_PROFILE_PROFILER_MAP_TO_UNORDERED_MAP_H #define _GLIBCXX_PROFILE_PROFILER_MAP_TO_UNORDERED_MAP_H 1 #include "profile/impl/profiler.h" #include "profile/impl/profiler_node.h" #include "profile/impl/profiler_trace.h" namespace __gnu_profile { inline int __log2(std::size_t __size) { for (int __bit_count = sizeof(std::size_t) - 1; __bit_count >= 0; -- __bit_count) if ((2 << __bit_count) & __size) return __bit_count; return 0; } inline float __map_insert_cost(std::size_t __size) { return (_GLIBCXX_PROFILE_DATA(__map_insert_cost_factor).__value * static_cast<float>(__log2(__size))); } inline float __map_erase_cost(std::size_t __size) { return (_GLIBCXX_PROFILE_DATA(__map_erase_cost_factor).__value * static_cast<float>(__log2(__size))); } inline float __map_find_cost(std::size_t __size) { return (_GLIBCXX_PROFILE_DATA(__map_find_cost_factor).__value * static_cast<float>(__log2(__size))); } /** @brief A map-to-unordered_map instrumentation line in the object table. */ class __map2umap_info : public __object_info_base { public: __map2umap_info(__stack_t __stack) : __object_info_base(__stack), _M_insert(0), _M_erase(0), _M_find(0), _M_iterate(0), _M_umap_cost(0.0), _M_map_cost(0.0) { } void __merge(const __map2umap_info& __o) { __object_info_base::__merge(__o); _M_insert += __o._M_insert; _M_erase += __o._M_erase; _M_find += __o._M_find; _M_iterate += __o._M_iterate; _M_umap_cost += __o._M_umap_cost; _M_map_cost += __o._M_map_cost; } void __write(FILE* __f) const { std::fprintf(__f, "%Zu %Zu %Zu %Zu %.0f %.0f\n", _M_insert, _M_erase, _M_find, _M_iterate, _M_map_cost, _M_umap_cost); } float __magnitude() const { return _M_map_cost - _M_umap_cost; } std::string __advice() const { return "prefer an unordered container"; } void __record_insert(std::size_t __size, std::size_t __count) { ++_M_insert; if (__count) { _M_map_cost += __count * __map_insert_cost(__size); _M_umap_cost += (__count * _GLIBCXX_PROFILE_DATA(__umap_insert_cost_factor).__value); } } void __record_erase(std::size_t __size, std::size_t __count) { ++_M_erase; if (__count) { _M_map_cost += __count * __map_erase_cost(__size); _M_umap_cost += (__count * _GLIBCXX_PROFILE_DATA(__umap_erase_cost_factor).__value); } } void __record_find(std::size_t __size) { ++_M_find; _M_map_cost += __map_find_cost(__size); _M_umap_cost += _GLIBCXX_PROFILE_DATA(__umap_find_cost_factor).__value; } void __record_iterate(int __count) { __gnu_cxx::__atomic_add(&_M_iterate, __count); } void __set_iterate_costs() { _M_umap_cost += (_M_iterate * _GLIBCXX_PROFILE_DATA(__umap_iterate_cost_factor).__value); _M_map_cost += (_M_iterate * _GLIBCXX_PROFILE_DATA(__map_iterate_cost_factor).__value); } private: std::size_t _M_insert; std::size_t _M_erase; std::size_t _M_find; mutable _Atomic_word _M_iterate; float _M_umap_cost; float _M_map_cost; }; /** @brief A map-to-unordered_map instrumentation line in the stack table. */ class __map2umap_stack_info : public __map2umap_info { public: __map2umap_stack_info(const __map2umap_info& __o) : __map2umap_info(__o) { } }; /** @brief Map-to-unordered_map instrumentation producer. */ class __trace_map2umap : public __trace_base<__map2umap_info, __map2umap_stack_info> { public: __trace_map2umap() : __trace_base<__map2umap_info, __map2umap_stack_info>() { __id = "ordered-to-unordered"; } // Call at destruction/clean to set container final size. void __destruct(__map2umap_info* __obj_info) { __obj_info->__set_iterate_costs(); __retire_object(__obj_info); } }; inline void __trace_map_to_unordered_map_init() { _GLIBCXX_PROFILE_DATA(_S_map2umap) = new __trace_map2umap(); } inline void __trace_map_to_unordered_map_free() { delete _GLIBCXX_PROFILE_DATA(_S_map2umap); } inline void __trace_map_to_unordered_map_report(FILE* __f, __warning_vector_t& __warnings) { __trace_report(_GLIBCXX_PROFILE_DATA(_S_map2umap), __f, __warnings); } inline __map2umap_info* __trace_map_to_unordered_map_construct() { if (!__profcxx_init()) return 0; if (!__reentrance_guard::__get_in()) return 0; __reentrance_guard __get_out; return _GLIBCXX_PROFILE_DATA(_S_map2umap)->__add_object(__get_stack()); } inline void __trace_map_to_unordered_map_insert(__map2umap_info* __info, std::size_t __size, std::size_t __count) { if (!__info) return; __info->__record_insert(__size, __count); } inline void __trace_map_to_unordered_map_erase(__map2umap_info* __info, std::size_t __size, std::size_t __count) { if (!__info) return; __info->__record_erase(__size, __count); } inline void __trace_map_to_unordered_map_find(__map2umap_info* __info, std::size_t __size) { if (!__info) return; __info->__record_find(__size); } inline void __trace_map_to_unordered_map_iterate(__map2umap_info* __info, int) { if (!__info) return; // We only collect if an iteration took place no matter in what side. __info->__record_iterate(1); } inline void __trace_map_to_unordered_map_invalidate(__map2umap_info* __info) { if (!__info) return; __info->__set_invalid(); } inline void __trace_map_to_unordered_map_destruct(__map2umap_info* __info) { if (!__info) return; _GLIBCXX_PROFILE_DATA(_S_map2umap)->__destruct(__info); } } // namespace __gnu_profile #endif /* _GLIBCXX_PROFILE_PROFILER_MAP_TO_UNORDERED_MAP_H */