131 lines
2.6 KiB
C++
131 lines
2.6 KiB
C++
/*
|
|
Copyright (C) 2002 Andrew Morton
|
|
|
|
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 2 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., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
|
|
*/
|
|
|
|
#include <cstdio>
|
|
#include <fstream>
|
|
#include "pbd/error.h"
|
|
#include "ardour/cycle_timer.h"
|
|
|
|
#include "ardour/libardour_visibility.h"
|
|
|
|
#include "pbd/i18n.h"
|
|
|
|
using namespace std;
|
|
using namespace PBD;
|
|
|
|
float CycleTimer::cycles_per_usec = 0;
|
|
|
|
float
|
|
get_mhz()
|
|
{
|
|
FILE *f;
|
|
|
|
if ((f = fopen("/proc/cpuinfo", "r")) == 0) {
|
|
fatal << _("CycleTimer::get_mhz(): can't open /proc/cpuinfo") << endmsg;
|
|
abort(); /*NOTREACHED*/
|
|
return 0.0f;
|
|
}
|
|
|
|
while (true) {
|
|
|
|
float mhz;
|
|
int ret;
|
|
char buf[1000];
|
|
|
|
if (fgets (buf, sizeof(buf), f) == 0) {
|
|
fatal << _("CycleTimer::get_mhz(): cannot locate cpu MHz in /proc/cpuinfo") << endmsg;
|
|
abort(); /*NOTREACHED*/
|
|
return 0.0f;
|
|
}
|
|
|
|
#ifdef __powerpc__
|
|
|
|
int imhz;
|
|
|
|
/* why can't the PPC crew standardize their /proc/cpuinfo format ? */
|
|
ret = sscanf (buf, "clock\t: %dMHz", &imhz);
|
|
mhz = (float) imhz;
|
|
|
|
#else /* XXX don't assume its x86 just because its not power pc */
|
|
ret = sscanf (buf, "cpu MHz : %f", &mhz);
|
|
|
|
#endif
|
|
if (ret == 1) {
|
|
fclose(f);
|
|
return mhz;
|
|
}
|
|
}
|
|
|
|
fatal << _("cannot locate cpu MHz in /proc/cpuinfo") << endmsg;
|
|
abort(); /*NOTREACHED*/
|
|
return 0.0f;
|
|
}
|
|
|
|
StoringTimer::StoringTimer (int N)
|
|
{
|
|
_point = new int[N];
|
|
_value = new cycles_t[N];
|
|
_ref = new cycles_t[N];
|
|
_max_points = N;
|
|
_points = 0;
|
|
}
|
|
|
|
#ifndef NDEBUG
|
|
void
|
|
StoringTimer::dump (string const & file)
|
|
{
|
|
ofstream f (file.c_str ());
|
|
|
|
f << min (_points, _max_points) << "\n";
|
|
f << get_mhz () << "\n";
|
|
for (int i = 0; i < min (_points, _max_points); ++i) {
|
|
f << _point[i] << " " << _ref[i] << " " << _value[i] << "\n";
|
|
}
|
|
}
|
|
#endif
|
|
|
|
void
|
|
StoringTimer::ref ()
|
|
{
|
|
_current_ref = get_cycles ();
|
|
}
|
|
|
|
void
|
|
StoringTimer::check (int p)
|
|
{
|
|
if (_points == _max_points) {
|
|
++_points;
|
|
return;
|
|
} else if (_points > _max_points) {
|
|
return;
|
|
}
|
|
|
|
_point[_points] = p;
|
|
_value[_points] = get_cycles ();
|
|
_ref[_points] = _current_ref;
|
|
|
|
++_points;
|
|
}
|
|
|
|
#ifdef PT_TIMING
|
|
StoringTimer ST (64 * 1024);
|
|
#endif
|
|
|
|
|