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/*
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 "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;
}
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";
}
}
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
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