1 /*
2 * benchtest3.c
3 *
4 *
5 * --------------------------------------------------------------------------
6 *
7 * Pthreads-win32 - POSIX Threads Library for Win32
8 * Copyright(C) 1998 John E. Bossom
9 * Copyright(C) 1999,2005 Pthreads-win32 contributors
10 *
11 * Contact Email: rpj@callisto.canberra.edu.au
12 *
13 * The current list of contributors is contained
14 * in the file CONTRIBUTORS included with the source
15 * code distribution. The list can also be seen at the
16 * following World Wide Web location:
17 * http://sources.redhat.com/pthreads-win32/contributors.html
18 *
19 * This library is free software; you can redistribute it and/or
20 * modify it under the terms of the GNU Lesser General Public
21 * License as published by the Free Software Foundation; either
22 * version 2 of the License, or (at your option) any later version.
23 *
24 * This library is distributed in the hope that it will be useful,
25 * but WITHOUT ANY WARRANTY; without even the implied warranty of
26 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
27 * Lesser General Public License for more details.
28 *
29 * You should have received a copy of the GNU Lesser General Public
30 * License along with this library in the file COPYING.LIB;
31 * if not, write to the Free Software Foundation, Inc.,
32 * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
33 *
34 * --------------------------------------------------------------------------
35 *
36 * Measure time taken to complete an elementary operation.
37 *
38 * - Mutex
39 * Single thread iteration over a trylock on a locked mutex for each mutex type.
40 */
41
42 #include "test.h"
43 #include <sys/timeb.h>
44
45 #ifdef __GNUC__
46 #include <stdlib.h>
47 #endif
48
49 #include "benchtest.h"
50
51 #define PTW32_MUTEX_TYPES
52 #define ITERATIONS 10000000L
53
54 pthread_mutex_t mx;
55 old_mutex_t ox;
56 pthread_mutexattr_t ma;
57 struct _timeb currSysTimeStart;
58 struct _timeb currSysTimeStop;
59 long durationMilliSecs;
60 long overHeadMilliSecs = 0;
61
62 #define GetDurationMilliSecs(_TStart, _TStop) ((_TStop.time*1000+_TStop.millitm) \
63 - (_TStart.time*1000+_TStart.millitm))
64
65 /*
66 * Dummy use of j, otherwise the loop may be removed by the optimiser
67 * when doing the overhead timing with an empty loop.
68 */
69 #define TESTSTART \
70 { int i, j = 0, k = 0; _ftime(&currSysTimeStart); for (i = 0; i < ITERATIONS; i++) { j++;
71
72 #define TESTSTOP \
73 }; _ftime(&currSysTimeStop); if (j + k == i) j++; }
74
75
76 void *
trylockThread(void * arg)77 trylockThread (void * arg)
78 {
79 TESTSTART
80 (void) pthread_mutex_trylock(&mx);
81 TESTSTOP
82
83 return NULL;
84 }
85
86
87 void *
oldTrylockThread(void * arg)88 oldTrylockThread (void * arg)
89 {
90 TESTSTART
91 (void) old_mutex_trylock(&ox);
92 TESTSTOP
93
94 return NULL;
95 }
96
97
98 void
runTest(char * testNameString,int mType)99 runTest (char * testNameString, int mType)
100 {
101 pthread_t t;
102
103 #ifdef PTW32_MUTEX_TYPES
104 (void) pthread_mutexattr_settype(&ma, mType);
105 #endif
106 assert(pthread_mutex_init(&mx, &ma) == 0);
107 assert(pthread_mutex_lock(&mx) == 0);
108 assert(pthread_create(&t, NULL, trylockThread, 0) == 0);
109 assert(pthread_join(t, NULL) == 0);
110 assert(pthread_mutex_unlock(&mx) == 0);
111 assert(pthread_mutex_destroy(&mx) == 0);
112
113 durationMilliSecs = GetDurationMilliSecs(currSysTimeStart, currSysTimeStop) - overHeadMilliSecs;
114
115 printf( "%-45s %15ld %15.3f\n",
116 testNameString,
117 durationMilliSecs,
118 (float) durationMilliSecs * 1E3 / ITERATIONS);
119 }
120
121
122 int
main(int argc,char * argv[])123 main (int argc, char *argv[])
124 {
125 pthread_t t;
126
127 assert(pthread_mutexattr_init(&ma) == 0);
128
129 printf( "=============================================================================\n");
130 printf( "\nTrylock on a locked mutex.\n");
131 printf( "%ld iterations.\n\n", ITERATIONS);
132 printf( "%-45s %15s %15s\n",
133 "Test",
134 "Total(msec)",
135 "average(usec)");
136 printf( "-----------------------------------------------------------------------------\n");
137
138 /*
139 * Time the loop overhead so we can subtract it from the actual test times.
140 */
141
142 TESTSTART
143 TESTSTOP
144
145 durationMilliSecs = GetDurationMilliSecs(currSysTimeStart, currSysTimeStop) - overHeadMilliSecs;
146 overHeadMilliSecs = durationMilliSecs;
147
148
149 old_mutex_use = OLD_WIN32CS;
150 assert(old_mutex_init(&ox, NULL) == 0);
151 assert(old_mutex_lock(&ox) == 0);
152 assert(pthread_create(&t, NULL, oldTrylockThread, 0) == 0);
153 assert(pthread_join(t, NULL) == 0);
154 assert(old_mutex_unlock(&ox) == 0);
155 assert(old_mutex_destroy(&ox) == 0);
156 durationMilliSecs = GetDurationMilliSecs(currSysTimeStart, currSysTimeStop) - overHeadMilliSecs;
157 printf( "%-45s %15ld %15.3f\n",
158 "Old PT Mutex using a Critical Section (WNT)",
159 durationMilliSecs,
160 (float) durationMilliSecs * 1E3 / ITERATIONS);
161
162 old_mutex_use = OLD_WIN32MUTEX;
163 assert(old_mutex_init(&ox, NULL) == 0);
164 assert(old_mutex_lock(&ox) == 0);
165 assert(pthread_create(&t, NULL, oldTrylockThread, 0) == 0);
166 assert(pthread_join(t, NULL) == 0);
167 assert(old_mutex_unlock(&ox) == 0);
168 assert(old_mutex_destroy(&ox) == 0);
169 durationMilliSecs = GetDurationMilliSecs(currSysTimeStart, currSysTimeStop) - overHeadMilliSecs;
170 printf( "%-45s %15ld %15.3f\n",
171 "Old PT Mutex using a Win32 Mutex (W9x)",
172 durationMilliSecs,
173 (float) durationMilliSecs * 1E3 / ITERATIONS);
174
175 printf( ".............................................................................\n");
176
177 /*
178 * Now we can start the actual tests
179 */
180 #ifdef PTW32_MUTEX_TYPES
181 runTest("PTHREAD_MUTEX_DEFAULT (W9x,WNT)", PTHREAD_MUTEX_DEFAULT);
182
183 runTest("PTHREAD_MUTEX_NORMAL (W9x,WNT)", PTHREAD_MUTEX_NORMAL);
184
185 runTest("PTHREAD_MUTEX_ERRORCHECK (W9x,WNT)", PTHREAD_MUTEX_ERRORCHECK);
186
187 runTest("PTHREAD_MUTEX_RECURSIVE (W9x,WNT)", PTHREAD_MUTEX_RECURSIVE);
188 #else
189 runTest("Non-blocking lock", 0);
190 #endif
191
192 printf( "=============================================================================\n");
193
194 /*
195 * End of tests.
196 */
197
198 pthread_mutexattr_destroy(&ma);
199
200 return 0;
201 }
202