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
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
|
/*
* benchtest1.c
*
* Measure time taken to complete an elementary operation.
*
* - Mutex
* Single thread iteration over lock/unlock for each mutex type.
*/
#include "test.h"
#include <sys/timeb.h>
#ifdef __GNUC__
#include <stdlib.h>
#endif
#include "benchtest.h"
#define PTW32_MUTEX_TYPES
#define ITERATIONS 10000000L
pthread_mutex_t mx;
pthread_mutexattr_t ma;
struct _timeb currSysTimeStart;
struct _timeb currSysTimeStop;
long durationMilliSecs;
long overHeadMilliSecs = 0;
#define GetDurationMilliSecs(_TStart, _TStop) ((_TStop.time*1000+_TStop.millitm) \
- (_TStart.time*1000+_TStart.millitm))
/*
* Dummy use of j, otherwise the loop may be removed by the optimiser
* when doing the overhead timing with an empty loop.
*/
#define TESTSTART \
{ int i, j = 0, k = 0; _ftime(&currSysTimeStart); for (i = 0; i < ITERATIONS; i++) { j++;
#define TESTSTOP \
}; _ftime(&currSysTimeStop); if (j + k == i) j++; }
void
runTest (char * testNameString, int mType)
{
#ifdef PTW32_MUTEX_TYPES
assert(pthread_mutexattr_settype(&ma, mType) == 0);
#endif
assert(pthread_mutex_init(&mx, &ma) == 0);
TESTSTART
assert(pthread_mutex_lock(&mx) == 0);
assert(pthread_mutex_unlock(&mx) == 0);
TESTSTOP
assert(pthread_mutex_destroy(&mx) == 0);
durationMilliSecs = GetDurationMilliSecs(currSysTimeStart, currSysTimeStop) - overHeadMilliSecs;
printf( "%-40s %15ld %15.3f\n",
testNameString,
durationMilliSecs,
(float) durationMilliSecs * 1E3 / ITERATIONS);
}
int
main (int argc, char *argv[])
{
CRITICAL_SECTION cs;
old_mutex_t ox;
pthread_mutexattr_init(&ma);
printf( "========================================================================\n");
printf( "\nLock plus unlock on an unlocked mutex.\n%ld iterations\n\n",
ITERATIONS);
printf( "%-40s %15s %15s\n",
"Test",
"Total(msec)",
"average(usec)");
printf( "------------------------------------------------------------------------\n");
/*
* Time the loop overhead so we can subtract it from the actual test times.
*/
TESTSTART
assert(1 == 1);
assert(1 == 1);
TESTSTOP
durationMilliSecs = GetDurationMilliSecs(currSysTimeStart, currSysTimeStop) - overHeadMilliSecs;
overHeadMilliSecs = durationMilliSecs;
InitializeCriticalSection(&cs);
TESTSTART
assert((EnterCriticalSection(&cs), 1) == 1);
assert((LeaveCriticalSection(&cs), 1) == 1);
TESTSTOP
DeleteCriticalSection(&cs);
durationMilliSecs = GetDurationMilliSecs(currSysTimeStart, currSysTimeStop) - overHeadMilliSecs;
printf( "%-40s %15ld %15.3f\n",
"Simple Critical Section",
durationMilliSecs,
(float) durationMilliSecs * 1E3 / ITERATIONS);
old_mutex_use = OLD_WIN32CS;
assert(old_mutex_init(&ox, NULL) == 0);
TESTSTART
assert(old_mutex_lock(&ox) == 0);
assert(old_mutex_unlock(&ox) == 0);
TESTSTOP
assert(old_mutex_destroy(&ox) == 0);
durationMilliSecs = GetDurationMilliSecs(currSysTimeStart, currSysTimeStop) - overHeadMilliSecs;
printf( "%-40s %15ld %15.3f\n",
"PT Mutex using a Critical Section (WNT)",
durationMilliSecs,
(float) durationMilliSecs * 1E3 / ITERATIONS);
old_mutex_use = OLD_WIN32MUTEX;
assert(old_mutex_init(&ox, NULL) == 0);
TESTSTART
assert(old_mutex_lock(&ox) == 0);
assert(old_mutex_unlock(&ox) == 0);
TESTSTOP
assert(old_mutex_destroy(&ox) == 0);
durationMilliSecs = GetDurationMilliSecs(currSysTimeStart, currSysTimeStop) - overHeadMilliSecs;
printf( "%-40s %15ld %15.3f\n",
"PT Mutex using a Win32 Mutex (W9x)",
durationMilliSecs,
(float) durationMilliSecs * 1E3 / ITERATIONS);
printf( "........................................................................\n");
/*
* Now we can start the actual tests
*/
#ifdef PTW32_MUTEX_TYPES
runTest("PTHREAD_MUTEX_DEFAULT (W9x,WNT)", PTHREAD_MUTEX_DEFAULT);
runTest("PTHREAD_MUTEX_NORMAL (W9x,WNT)", PTHREAD_MUTEX_NORMAL);
runTest("PTHREAD_MUTEX_ERRORCHECK (W9x,WNT)", PTHREAD_MUTEX_ERRORCHECK);
runTest("PTHREAD_MUTEX_RECURSIVE (W9x,WNT)", PTHREAD_MUTEX_RECURSIVE);
#else
runTest("Non-blocking lock", 0);
#endif
printf( "========================================================================\n");
/*
* End of tests.
*/
pthread_mutexattr_destroy(&ma);
return 0;
}
|
