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
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
|
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*
** File: lockfile.c
** Purpose: test basic locking functions
** Just because this times stuff, don't think its a perforamnce
** test!!!
**
** Modification History:
** 19-May-97 AGarcia- Converted the test to accomodate the debug_mode flag.
** The debug mode will print all of the printfs associated with this test.
** The regress mode will be the default mode. Since the regress tool limits
** the output to a one line status:PASS or FAIL,all of the printf statements
** have been handled with an if (debug_mode) statement.
** 04-June-97 AGarcia removed the Test_Result function. Regress tool has been updated to
** recognize the return code from tha main program.
***********************************************************************/
/***********************************************************************
** Includes
***********************************************************************/
/* Used to get the command line option */
#include "plgetopt.h"
#include "prcmon.h"
#include "prerror.h"
#include "prinit.h"
#include "prinrval.h"
#include "prlock.h"
#include "prlog.h"
#include "prmon.h"
#include "prthread.h"
#include "prtypes.h"
#include "private/pprio.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
PRIntn failed_already=0;
PRIntn debug_mode;
const static PRIntervalTime contention_interval = 50;
typedef struct LockContentious_s {
PRLock *ml;
PRInt32 loops;
PRIntervalTime overhead;
PRIntervalTime interval;
} LockContentious_t;
#define LOCKFILE "prlock.fil"
static PRIntervalTime NonContentiousLock(PRInt32 loops)
{
PRFileDesc *_lockfile;
while (loops-- > 0)
{
_lockfile = PR_Open(LOCKFILE, PR_CREATE_FILE|PR_RDWR, 0666);
if (!_lockfile) {
if (debug_mode) printf(
"could not create lockfile: %d [%d]\n",
PR_GetError(), PR_GetOSError());
return PR_INTERVAL_NO_TIMEOUT;
}
PR_LockFile(_lockfile);
PR_UnlockFile(_lockfile);
PR_Close(_lockfile);
}
return 0;
} /* NonContentiousLock */
static void PR_CALLBACK LockContender(void *arg)
{
LockContentious_t *contention = (LockContentious_t*)arg;
PRFileDesc *_lockfile;
while (contention->loops-- > 0)
{
_lockfile = PR_Open(LOCKFILE, PR_CREATE_FILE|PR_RDWR, 0666);
if (!_lockfile) {
if (debug_mode) printf(
"could not create lockfile: %d [%d]\n",
PR_GetError(), PR_GetOSError());
break;
}
PR_LockFile(_lockfile);
PR_Sleep(contention->interval);
PR_UnlockFile(_lockfile);
PR_Close(_lockfile);
}
} /* LockContender */
/*
** Win16 requires things passed to Threads not be on the stack
*/
static LockContentious_t contention;
static PRIntervalTime ContentiousLock(PRInt32 loops)
{
PRStatus status;
PRThread *thread = NULL;
PRIntervalTime overhead, timein = PR_IntervalNow();
contention.loops = loops;
contention.overhead = 0;
contention.ml = PR_NewLock();
contention.interval = contention_interval;
thread = PR_CreateThread(
PR_USER_THREAD, LockContender, &contention,
PR_PRIORITY_LOW, PR_LOCAL_THREAD, PR_JOINABLE_THREAD, 0);
PR_ASSERT(thread != NULL);
overhead = PR_IntervalNow() - timein;
while (contention.loops > 0)
{
PR_Lock(contention.ml);
contention.overhead += contention.interval;
PR_Sleep(contention.interval);
PR_Unlock(contention.ml);
}
timein = PR_IntervalNow();
status = PR_JoinThread(thread);
PR_DestroyLock(contention.ml);
overhead += (PR_IntervalNow() - timein);
return overhead + contention.overhead;
} /* ContentiousLock */
static PRIntervalTime Test(
const char* msg, PRIntervalTime (*test)(PRInt32 loops),
PRInt32 loops, PRIntervalTime overhead)
{
/*
* overhead - overhead not measured by the test.
* duration - wall clock time it took to perform test.
* predicted - extra time test says should not be counted
*
* Time accountable to the test is duration - overhead - predicted
* All times are Intervals and accumulated for all iterations.
*/
PRFloat64 elapsed;
PRIntervalTime accountable, duration;
PRUintn spaces = strlen(msg);
PRIntervalTime timeout, timein = PR_IntervalNow();
PRIntervalTime predicted = test(loops);
timeout = PR_IntervalNow();
duration = timeout - timein;
accountable = duration - predicted;
accountable -= overhead;
elapsed = (PRFloat64)PR_IntervalToMicroseconds(accountable);
if (debug_mode) {
printf("%s:", msg);
}
while (spaces++ < 50) if (debug_mode) {
printf(" ");
}
if ((PRInt32)accountable < 0) {
if (debug_mode) {
printf("*****.** usecs/iteration\n");
}
} else {
if (debug_mode) {
printf("%8.2f usecs/iteration\n", elapsed/loops);
}
}
return duration;
} /* Test */
int main(int argc, char **argv)
{
PRIntervalTime duration;
PRUint32 cpu, cpus = 2;
PRInt32 loops = 100;
/* The command line argument: -d is used to determine if the test is being run
in debug mode. The regress tool requires only one line output:PASS or FAIL.
All of the printfs associated with this test has been handled with a if (debug_mode)
test.
Usage: test_name -d
*/
PLOptStatus os;
PLOptState *opt = PL_CreateOptState(argc, argv, "d:");
while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
{
if (PL_OPT_BAD == os) {
continue;
}
switch (opt->option)
{
case 'd': /* debug mode */
debug_mode = 1;
break;
default:
break;
}
}
PL_DestroyOptState(opt);
/* main test */
PR_Init(PR_USER_THREAD, PR_PRIORITY_NORMAL, 0);
PR_STDIO_INIT();
if (argc > 1) {
loops = atoi(argv[1]);
}
if (loops == 0) {
loops = 100;
}
if (debug_mode) {
printf("Lock: Using %d loops\n", loops);
}
cpus = (argc < 3) ? 2 : atoi(argv[2]);
if (cpus == 0) {
cpus = 2;
}
if (debug_mode) {
printf("Lock: Using %d cpu(s)\n", cpus);
}
for (cpu = 1; cpu <= cpus; ++cpu)
{
if (debug_mode) {
printf("\nLockFile: Using %d CPU(s)\n", cpu);
}
PR_SetConcurrency(cpu);
duration = Test("LockFile non-contentious locking/unlocking", NonContentiousLock, loops, 0);
(void)Test("LockFile contentious locking/unlocking", ContentiousLock, loops, duration);
}
PR_Delete(LOCKFILE); /* try to get rid of evidence */
if (debug_mode) {
printf("%s: test %s\n", "Lock(mutex) test", ((failed_already) ? "failed" : "passed"));
}
if(failed_already) {
return 1;
}
else {
return 0;
}
} /* main */
/* testlock.c */
|
