Edit File: profiler_container_size.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_container_size.h * @brief Diagnostics for container sizes. */ // Written by Lixia Liu and Silvius Rus. #ifndef _GLIBCXX_PROFILE_PROFILER_CONTAINER_SIZE_H #define _GLIBCXX_PROFILE_PROFILER_CONTAINER_SIZE_H 1 #include <sstream> #include "profile/impl/profiler.h" #include "profile/impl/profiler_node.h" #include "profile/impl/profiler_trace.h" namespace __gnu_profile { /** @brief A container size instrumentation line in the object table. */ class __container_size_info : public __object_info_base { public: __container_size_info(__stack_t __stack) : __object_info_base(__stack), _M_init(0), _M_max(0), _M_min(0), _M_total(0), _M_item_min(0), _M_item_max(0), _M_item_total(0), _M_count(0), _M_resize(0), _M_cost(0) { } void __write(FILE* __f) const { std::fprintf(__f, "%Zu %Zu %Zu %Zu %Zu %Zu %Zu %Zu %Zu %Zu\n", _M_init, _M_count, _M_cost, _M_resize, _M_min, _M_max, _M_total, _M_item_min, _M_item_max, _M_item_total); } float __magnitude() const { return static_cast<float>(_M_cost); } std::string __advice() const { std::stringstream __message; if (_M_init < _M_item_max) __message << "change initial container size from " << _M_init << " to " << _M_item_max; return __message.str(); } void __init(std::size_t __num) { _M_init = __num; _M_max = __num; } void __merge(const __container_size_info& __o) { __object_info_base::__merge(__o); _M_init = std::max(_M_init, __o._M_init); _M_max = std::max(_M_max, __o._M_max); _M_item_max = std::max(_M_item_max, __o._M_item_max); _M_min = std::min(_M_min, __o._M_min); _M_item_min = std::min(_M_item_min, __o._M_item_min); _M_total += __o._M_total; _M_item_total += __o._M_item_total; _M_count += __o._M_count; _M_cost += __o._M_cost; _M_resize += __o._M_resize; } // Call if a container is destructed or cleaned. void __destruct(std::size_t __num, std::size_t __inum) { _M_max = std::max(_M_max, __num); _M_item_max = std::max(_M_item_max, __inum); if (_M_min == 0) { _M_min = __num; _M_item_min = __inum; } else { _M_min = std::min(_M_min, __num); _M_item_min = std::min(_M_item_min, __inum); } _M_total += __num; _M_item_total += __inum; _M_count += 1; } // Estimate the cost of resize/rehash. float __resize_cost(std::size_t __from, std::size_t) { return __from; } // Call if container is resized. void __resize(std::size_t __from, std::size_t __to) { _M_cost += this->__resize_cost(__from, __to); _M_resize += 1; _M_max = std::max(_M_max, __to); } private: std::size_t _M_init; std::size_t _M_max; // range of # buckets std::size_t _M_min; std::size_t _M_total; std::size_t _M_item_min; // range of # items std::size_t _M_item_max; std::size_t _M_item_total; std::size_t _M_count; std::size_t _M_resize; std::size_t _M_cost; }; /** @brief A container size instrumentation line in the stack table. */ class __container_size_stack_info : public __container_size_info { public: __container_size_stack_info(const __container_size_info& __o) : __container_size_info(__o) { } }; /** @brief Container size instrumentation trace producer. */ class __trace_container_size : public __trace_base<__container_size_info, __container_size_stack_info> { public: ~__trace_container_size() { } __trace_container_size() : __trace_base<__container_size_info, __container_size_stack_info>() { }; // Insert a new node at construct with object, callstack and initial size. __container_size_info* __insert(__stack_t __stack, std::size_t __num) { __container_size_info* __ret = __add_object(__stack); if (__ret) __ret->__init(__num); return __ret; } // Call at destruction/clean to set container final size. void __destruct(__container_size_info* __obj_info, std::size_t __num, std::size_t __inum) { __obj_info->__destruct(__num, __inum); __retire_object(__obj_info); } }; } // namespace __gnu_profile #endif /* _GLIBCXX_PROFILE_PROFILER_CONTAINER_SIZE_H */
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