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"
30 float CycleTimer::cycles_per_usec = 0;
37 if ((f = fopen("/proc/cpuinfo", "r")) == 0) {
38 fatal << _("CycleTimer::get_mhz(): can't open /proc/cpuinfo") << endmsg;
49 if (fgets (buf, sizeof(buf), f) == 0) {
50 fatal << _("CycleTimer::get_mhz(): cannot locate cpu MHz in /proc/cpuinfo") << endmsg;
59 /* why can't the PPC crew standardize their /proc/cpuinfo format ? */
60 ret = sscanf (buf, "clock\t: %dMHz", &imhz);
63 #else /* XXX don't assume its x86 just because its not power pc */
64 ret = sscanf (buf, "cpu MHz : %f", &mhz);
73 fatal << _("cannot locate cpu MHz in /proc/cpuinfo") << endmsg;
78 StoringTimer::StoringTimer (int N)
81 _value = new cycles_t[N];
82 _ref = new cycles_t[N];
89 StoringTimer::dump (string const & file)
91 ofstream f (file.c_str ());
93 f << min (_points, _max_points) << "\n";
94 f << get_mhz () << "\n";
95 for (int i = 0; i < min (_points, _max_points); ++i) {
96 f << _point[i] << " " << _ref[i] << " " << _value[i] << "\n";
103 _current_ref = get_cycles ();
107 StoringTimer::check (int p)
109 if (_points == _max_points) {
112 } else if (_points > _max_points) {
117 _value[_points] = get_cycles ();
118 _ref[_points] = _current_ref;
124 StoringTimer ST (64 * 1024);