mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-11-30 05:23:49 +08:00
134 lines
3.1 KiB
C++
134 lines
3.1 KiB
C++
// timer.cc -- helper class for time accounting
|
|
|
|
// Copyright (C) 2009-2015 Free Software Foundation, Inc.
|
|
// Written by Rafael Avila de Espindola <espindola@google.com>.
|
|
|
|
// This file is part of gold.
|
|
|
|
// This program 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 of the License, or
|
|
// (at your option) any later version.
|
|
|
|
// This program 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 program; if not, write to the Free Software
|
|
// Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
|
|
// MA 02110-1301, USA.
|
|
|
|
#include "gold.h"
|
|
|
|
#include <unistd.h>
|
|
|
|
#ifdef HAVE_TIMES
|
|
#include <sys/times.h>
|
|
#endif
|
|
|
|
#include "libiberty.h"
|
|
|
|
#include "timer.h"
|
|
|
|
namespace gold
|
|
{
|
|
|
|
// Class Timer
|
|
|
|
Timer::Timer()
|
|
{
|
|
this->start_time_.wall = 0;
|
|
this->start_time_.user = 0;
|
|
this->start_time_.sys = 0;
|
|
}
|
|
|
|
// Start counting the time.
|
|
void
|
|
Timer::start()
|
|
{
|
|
this->get_time(&this->start_time_);
|
|
}
|
|
|
|
// Record the time used by pass N (0 <= N <= 2).
|
|
void
|
|
Timer::stamp(int n)
|
|
{
|
|
gold_assert(n >= 0 && n <= 2);
|
|
TimeStats& thispass = this->pass_times_[n];
|
|
this->get_time(&thispass);
|
|
}
|
|
|
|
#if HAVE_SYSCONF && defined _SC_CLK_TCK
|
|
# define TICKS_PER_SECOND sysconf (_SC_CLK_TCK) /* POSIX 1003.1-1996 */
|
|
#else
|
|
# ifdef CLK_TCK
|
|
# define TICKS_PER_SECOND CLK_TCK /* POSIX 1003.1-1988; obsolescent */
|
|
# else
|
|
# ifdef HZ
|
|
# define TICKS_PER_SECOND HZ /* traditional UNIX */
|
|
# else
|
|
# define TICKS_PER_SECOND 100 /* often the correct value */
|
|
# endif
|
|
# endif
|
|
#endif
|
|
|
|
// times returns statistics in clock_t units. This variable will hold the
|
|
// conversion factor to seconds. We use a variable that is initialized once
|
|
// because sysconf can be slow.
|
|
static long ticks_per_sec;
|
|
class Timer_init
|
|
{
|
|
public:
|
|
Timer_init()
|
|
{
|
|
ticks_per_sec = TICKS_PER_SECOND;
|
|
}
|
|
};
|
|
Timer_init timer_init;
|
|
|
|
// Write the current time information.
|
|
void
|
|
Timer::get_time(TimeStats *now)
|
|
{
|
|
#ifdef HAVE_TIMES
|
|
tms t;
|
|
now->wall = (times(&t) * 1000) / ticks_per_sec;
|
|
now->user = (t.tms_utime * 1000) / ticks_per_sec;
|
|
now->sys = (t.tms_stime * 1000) / ticks_per_sec;
|
|
#else
|
|
now->wall = get_run_time() / 1000;
|
|
now->user = 0;
|
|
now->sys = 0;
|
|
#endif
|
|
}
|
|
|
|
// Return the stats since start was called.
|
|
Timer::TimeStats
|
|
Timer::get_elapsed_time()
|
|
{
|
|
TimeStats now;
|
|
this->get_time(&now);
|
|
TimeStats delta;
|
|
delta.wall = now.wall - this->start_time_.wall;
|
|
delta.user = now.user - this->start_time_.user;
|
|
delta.sys = now.sys - this->start_time_.sys;
|
|
return delta;
|
|
}
|
|
|
|
// Return the stats for pass N (0 <= N <= 2).
|
|
Timer::TimeStats
|
|
Timer::get_pass_time(int n)
|
|
{
|
|
gold_assert(n >= 0 && n <= 2);
|
|
TimeStats thispass = this->pass_times_[n];
|
|
TimeStats& lastpass = n > 0 ? this->pass_times_[n-1] : this->start_time_;
|
|
thispass.wall -= lastpass.wall;
|
|
thispass.user -= lastpass.user;
|
|
thispass.sys -= lastpass.sys;
|
|
return thispass;
|
|
}
|
|
|
|
}
|