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// -*- C++ -*-
// Testing performance utilities for the C++ library testsuite.
//
// Copyright (C) 2003 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 2, 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.
//
// You should have received a copy of the GNU General Public License along
// with this library; see the file COPYING. If not, write to the Free
// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
// USA.
//
// As a special exception, you may use this file as part of a free software
// library without restriction. Specifically, if other files instantiate
// templates or use macros or inline functions from this file, or you compile
// this file and link it with other files to produce an executable, this
// file does not by itself cause the resulting executable to be covered by
// the GNU General Public License. This exception does not however
// invalidate any other reasons why the executable file might be covered by
// the GNU General Public License.
#ifndef _GLIBCXX_PERFORMANCE_H
#define _GLIBCXX_PERFORMANCE_H
#include <sys/times.h>
#include <sys/resource.h>
#include <cstdlib>
#include <string>
#include <fstream>
#include <iomanip>
#ifdef __linux__
#include <malloc.h>
#elif defined (__FreeBSD__)
extern "C"
{
struct mallinfo { int uordblks; };
struct mallinfo mallinfo(void)
{ struct mallinfo m = { (((size_t) sbrk (0) + 1023) / 1024) }; return m; }
}
#else
extern "C"
{
struct mallinfo { int uordblks; };
struct mallinfo empty = { 0 };
struct mallinfo mallinfo(void) { return empty; }
}
#endif
namespace __gnu_test
{
class time_counter
{
clock_t elapsed_begin;
clock_t elapsed_end;
tms tms_begin;
tms tms_end;
public:
time_counter()
{ this->clear(); }
void
clear()
{
elapsed_begin = 0;
elapsed_end = 0;
memset(&tms_begin, 0, sizeof(tms));
memset(&tms_end, 0, sizeof(tms));
}
void
start()
{ elapsed_begin = times(&tms_begin); }
void
stop()
{ elapsed_end = times(&tms_end); }
size_t
real_time() const
{ return elapsed_end - elapsed_begin; }
size_t
user_time() const
{ return tms_end.tms_utime - tms_begin.tms_utime; }
size_t
system_time() const
{ return tms_end.tms_stime - tms_begin.tms_stime; }
};
class resource_counter
{
int who;
rusage rusage_begin;
rusage rusage_end;
struct mallinfo allocation_begin;
struct mallinfo allocation_end;
public:
resource_counter(int i = RUSAGE_SELF) : who(i)
{ this->clear(); }
void
clear()
{
memset(&rusage_begin, 0, sizeof(rusage_begin));
memset(&rusage_end, 0, sizeof(rusage_end));
memset(&allocation_begin, 0, sizeof(allocation_begin));
memset(&allocation_end, 0, sizeof(allocation_end));
}
void
start()
{
if (getrusage(who, &rusage_begin) != 0 )
memset(&rusage_begin, 0, sizeof(rusage_begin));
malloc(0); // Needed for some implementations.
allocation_begin = mallinfo();
}
void
stop()
{
if (getrusage(who, &rusage_end) != 0 )
memset(&rusage_end, 0, sizeof(rusage_end));
allocation_end = mallinfo();
}
int
allocated_memory() const
{ return allocation_end.uordblks - allocation_begin.uordblks; }
long
hard_page_fault() const
{ return rusage_end.ru_majflt - rusage_begin.ru_majflt; }
long
swapped() const
{ return rusage_end.ru_nswap - rusage_begin.ru_nswap; }
};
void
start_counters(time_counter& t, resource_counter& r)
{
t.start();
r.start();
}
void
stop_counters(time_counter& t, resource_counter& r)
{
t.stop();
r.stop();
}
void
clear_counters(time_counter& t, resource_counter& r)
{
t.clear();
r.clear();
}
void
report_performance(const std::string file, const std::string comment,
const time_counter& t, const resource_counter& r)
{
const char space = ' ';
const char tab = '\t';
const char* name = "libstdc++-performance.sum";
std::string::const_iterator i = file.begin() + file.find_last_of('/') + 1;
std::string testname(i, file.end());
std::ofstream out(name, std::ios_base::app);
out.setf(std::ios_base::left);
out << std::setw(25) << testname << tab;
out << std::setw(10) << comment << tab;
out.setf(std::ios_base::right);
out << std::setw(4) << t.real_time() << "r" << space;
out << std::setw(4) << t.user_time() << "u" << space;
out << std::setw(4) << t.system_time() << "s" << space;
out << std::setw(4) << r.allocated_memory() << "mem" << space;
out << std::setw(4) << r.hard_page_fault() << "pf" << space;
out << std::endl;
out.close();
}
}; // namespace __gnu_test
#endif // _GLIBCXX_PERFORMANCE_H
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