2 Copyright (C) 2002 Andrew Morton
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 #include "pbd/error.h"
23 #include "ardour/cycle_timer.h"
25 #include "ardour/libardour_visibility.h"
32 float CycleTimer::cycles_per_usec = 0;
39 if ((f = fopen("/proc/cpuinfo", "r")) == 0) {
40 fatal << _("CycleTimer::get_mhz(): can't open /proc/cpuinfo") << endmsg;
51 if (fgets (buf, sizeof(buf), f) == 0) {
52 fatal << _("CycleTimer::get_mhz(): cannot locate cpu MHz in /proc/cpuinfo") << endmsg;
61 /* why can't the PPC crew standardize their /proc/cpuinfo format ? */
62 ret = sscanf (buf, "clock\t: %dMHz", &imhz);
65 #else /* XXX don't assume its x86 just because its not power pc */
66 ret = sscanf (buf, "cpu MHz : %f", &mhz);
75 fatal << _("cannot locate cpu MHz in /proc/cpuinfo") << endmsg;
80 StoringTimer::StoringTimer (int N)
83 _value = new cycles_t[N];
84 _ref = new cycles_t[N];
91 StoringTimer::dump (string const & file)
93 ofstream f (file.c_str ());
95 f << min (_points, _max_points) << "\n";
96 f << get_mhz () << "\n";
97 for (int i = 0; i < min (_points, _max_points); ++i) {
98 f << _point[i] << " " << _ref[i] << " " << _value[i] << "\n";
105 _current_ref = get_cycles ();
109 StoringTimer::check (int p)
111 if (_points == _max_points) {
114 } else if (_points > _max_points) {
119 _value[_points] = get_cycles ();
120 _ref[_points] = _current_ref;
126 StoringTimer ST (64 * 1024);