1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
|
/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2013 CERN
* @author Tomasz Wlostowski <tomasz.wlostowski@cern.ch>
*
* 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, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
/**
* @file profile.h:
* @brief Simple profiling functions for measuring code execution time.
*/
#ifndef __TPROFILE_H
#define __TPROFILE_H
#include <sys/time.h>
#include <stdint.h>
/**
* Function get_tics
* Returns the number of microseconds that have elapsed since the system was started.
* @return uint64_t Number of microseconds.
*/
static inline uint64_t get_tics()
{
struct timeval tv;
gettimeofday( &tv, NULL );
return (uint64_t) tv.tv_sec * 1000000ULL + (uint64_t) tv.tv_usec;
}
/**
* Structure for storing data related to profiling counters.
*/
struct prof_counter
{
uint64_t start, end; // Stored timer value
uint64_t usecs() const
{
return end - start;
}
float msecs() const
{
return ( end - start ) / 1000.0;
}
};
/**
* Function prof_start
* Begins code execution time counting for a given profiling counter.
* @param aCnt is the counter which should be started.
* use_rdtsc tells if processor's time-stamp counter should be used for time counting.
* Otherwise is system tics method will be used. IMPORTANT: time-stamp counter should not
* be used on multicore machines executing threaded code.
*/
static inline void prof_start( prof_counter* aCnt )
{
aCnt->start = get_tics();
}
/**
* Function prof_stop
* Ends code execution time counting for a given profiling counter.
* @param aCnt is the counter which should be stopped.
*/
static inline void prof_end( prof_counter* aCnt )
{
aCnt->end = get_tics();
}
#endif
|
