profiler_hash_func.h
Go to the documentation of this file.
// -*- 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_hash_func.h
* @brief Data structures to represent profiling traces.
*/
// Written by Lixia Liu and Silvius Rus.
#ifndef _GLIBCXX_PROFILE_PROFILER_HASH_FUNC_H
#define _GLIBCXX_PROFILE_PROFILER_HASH_FUNC_H 1
#include "profile/impl/profiler.h"
#include "profile/impl/profiler_node.h"
#include "profile/impl/profiler_trace.h"
namespace __gnu_profile
{
/** @brief A hash performance instrumentation line in the object table. */
class __hashfunc_info
: public __object_info_base
{
public:
__hashfunc_info(__stack_t __stack)
: __object_info_base(__stack), _M_longest_chain(0),
_M_accesses(0), _M_hops(0) { }
void
__merge(const __hashfunc_info& __o)
{
__object_info_base::__merge(__o);
_M_longest_chain = std::max(_M_longest_chain, __o._M_longest_chain);
_M_accesses += __o._M_accesses;
_M_hops += __o._M_hops;
}
void
__destruct(std::size_t __chain, std::size_t __accesses,
std::size_t __hops)
{
_M_longest_chain = std::max(_M_longest_chain, __chain);
_M_accesses += __accesses;
_M_hops += __hops;
}
void
__write(FILE* __f) const
{ std::fprintf(__f, "%Zu %Zu %Zu\n", _M_hops,
_M_accesses, _M_longest_chain); }
float
__magnitude() const
{ return static_cast<float>(_M_hops); }
std::string
__advice() const
{ return "change hash function"; }
private:
std::size_t _M_longest_chain;
std::size_t _M_accesses;
std::size_t _M_hops;
};
/** @brief A hash performance instrumentation line in the stack table. */
class __hashfunc_stack_info
: public __hashfunc_info
{
public:
__hashfunc_stack_info(const __hashfunc_info& __o)
: __hashfunc_info(__o) { }
};
/** @brief Hash performance instrumentation producer. */
class __trace_hash_func
: public __trace_base<__hashfunc_info, __hashfunc_stack_info>
{
public:
__trace_hash_func()
: __trace_base<__hashfunc_info, __hashfunc_stack_info>()
{ __id = "hash-distr"; }
~__trace_hash_func() {}
// Call at destruction/clean to set container final size.
void
__destruct(__hashfunc_info* __obj_info,
std::size_t __chain, std::size_t __accesses, std::size_t __hops)
{
if (!__obj_info)
return;
__obj_info->__destruct(__chain, __accesses, __hops);
__retire_object(__obj_info);
}
};
inline void
__trace_hash_func_init()
{ _GLIBCXX_PROFILE_DATA(_S_hash_func) = new __trace_hash_func(); }
inline void
__trace_hash_func_free()
{ delete _GLIBCXX_PROFILE_DATA(_S_hash_func); }
inline void
__trace_hash_func_report(FILE* __f, __warning_vector_t& __warnings)
{ __trace_report(_GLIBCXX_PROFILE_DATA(_S_hash_func), __f, __warnings); }
inline __hashfunc_info*
__trace_hash_func_construct()
{
if (!__profcxx_init())
return 0;
if (!__reentrance_guard::__get_in())
return 0;
__reentrance_guard __get_out;
return _GLIBCXX_PROFILE_DATA(_S_hash_func)->__add_object(__get_stack());
}
inline void
__trace_hash_func_destruct(__hashfunc_info* __obj_info,
std::size_t __chain, std::size_t __accesses,
std::size_t __hops)
{
_GLIBCXX_PROFILE_DATA(_S_hash_func)->__destruct(__obj_info, __chain,
__accesses, __hops);
}
} // namespace __gnu_profile
#endif /* _GLIBCXX_PROFILE_PROFILER_HASH_FUNC_H */
profiler_node.h
Data structures to represent a single profiling event.
profiler.h
Interface of the profiling runtime library.
std::basic_string< char >
__gnu_profile::__trace_hash_func
Hash performance instrumentation producer.
Definition: profiler_hash_func.h:95
__gnu_profile
GNU profile code for public use.
__gnu_profile::__reentrance_guard
Reentrance guard.
Definition: profiler.h:58
__gnu_profile::__trace_base
Base class for all trace producers.
Definition: profiler_trace.h:190
__gnu_profile::__hashfunc_stack_info
A hash performance instrumentation line in the stack table.
Definition: profiler_hash_func.h:86
__gnu_profile::__object_info_base
Base class for a line in the object table.
Definition: profiler_node.h:127
profiler_trace.h
Data structures to represent profiling traces.
__gnu_profile::__hashfunc_info
A hash performance instrumentation line in the object table.
Definition: profiler_hash_func.h:40
__gnu_profile::__profcxx_init
bool __profcxx_init()
This function must be called by each instrumentation point.
Definition: profiler_trace.h:653
std::max
_GLIBCXX14_CONSTEXPR const _Tp & max(const _Tp &, const _Tp &)
This does what you think it does.
Definition: stl_algobase.h:219