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
|
/* Copyright (C) 2003-2014 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<http://www.gnu.org/licenses/>. */
#include <errno.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <unistd.h>
#if defined _POSIX_THREAD_CPUTIME && _POSIX_THREAD_CPUTIME >= 0
static pthread_barrier_t b2;
static pthread_barrier_t bN;
static void *
tf (void *arg)
{
int e = pthread_barrier_wait (&b2);
if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
{
puts ("barrier_wait failed");
exit (1);
}
e = pthread_barrier_wait (&bN);
if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
{
puts ("barrier_wait failed");
exit (1);
}
return NULL;
}
#endif
int
do_test (void)
{
#if defined _POSIX_THREAD_CPUTIME && _POSIX_THREAD_CPUTIME >= 0
# define N 10
# if _POSIX_THREAD_CPUTIME == 0
if (sysconf (_SC_THREAD_CPUTIME) < 0)
{
puts ("_POSIX_THREAD_CPUTIME option not available");
return 0;
}
# endif
if (pthread_barrier_init (&b2, NULL, 2) != 0
|| pthread_barrier_init (&bN, NULL, N + 1) != 0)
{
puts ("barrier_init failed");
return 1;
}
struct timespec ts = { .tv_sec = 0, .tv_nsec = 100000000 };
TEMP_FAILURE_RETRY (nanosleep (&ts, &ts));
pthread_t th[N + 1];
clockid_t cl[N + 1];
# ifndef CLOCK_THREAD_CPUTIME_ID
if (pthread_getcpuclockid (pthread_self (), &cl[0]) != 0)
{
puts ("own pthread_getcpuclockid failed");
return 1;
}
# else
cl[0] = CLOCK_THREAD_CPUTIME_ID;
# endif
pthread_attr_t at;
if (pthread_attr_init (&at) != 0)
{
puts ("attr_init failed");
return 1;
}
if (pthread_attr_setstacksize (&at, 1 * 1024 * 1024) != 0)
{
puts ("attr_setstacksize failed");
return 1;
}
int i;
int e;
for (i = 0; i < N; ++i)
{
if (pthread_create (&th[i], &at, tf, NULL) != 0)
{
puts ("create failed");
return 1;
}
e = pthread_barrier_wait (&b2);
if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
{
puts ("barrier_wait failed");
return 1;
}
ts.tv_sec = 0;
ts.tv_nsec = 100000000;
TEMP_FAILURE_RETRY (nanosleep (&ts, &ts));
if (pthread_getcpuclockid (th[i], &cl[i + 1]) != 0)
{
puts ("pthread_getcpuclockid failed");
return 1;
}
}
if (pthread_attr_destroy (&at) != 0)
{
puts ("attr_destroy failed");
return 1;
}
struct timespec t[N + 1];
for (i = 0; i < N + 1; ++i)
if (clock_gettime (cl[i], &t[i]) != 0)
{
printf ("clock_gettime round %d failed\n", i);
return 1;
}
for (i = 0; i < N; ++i)
{
struct timespec diff;
diff.tv_sec = t[i].tv_sec - t[i + 1].tv_sec;
diff.tv_nsec = t[i].tv_nsec - t[i + 1].tv_nsec;
if (diff.tv_nsec < 0)
{
diff.tv_nsec += 1000000000;
--diff.tv_sec;
}
if (diff.tv_sec < 0 || (diff.tv_sec == 0 && diff.tv_nsec < 100000000))
{
printf ("\
difference between thread %d and %d too small (%ld.%09ld)\n",
i, i + 1, (long int) diff.tv_sec, (long int) diff.tv_nsec);
return 1;
}
printf ("diff %d->%d: %ld.%09ld\n",
i, i + 1, (long int) diff.tv_sec, (long int) diff.tv_nsec);
}
ts.tv_sec = 0;
ts.tv_nsec = 0;
for (i = 0; i < N + 1; ++i)
if (clock_settime (cl[i], &ts) != 0)
{
printf ("clock_settime(%d) round %d failed\n", cl[i], i);
return 1;
}
for (i = 0; i < N + 1; ++i)
{
if (clock_gettime (cl[i], &ts) != 0)
{
puts ("clock_gettime failed");
return 1;
}
if (ts.tv_sec > t[i].tv_sec
|| (ts.tv_sec == t[i].tv_sec && ts.tv_nsec > t[i].tv_nsec))
{
puts ("clock_settime didn't reset clock");
return 1;
}
}
#endif
return 0;
}
#define TEST_FUNCTION do_test ()
#include "../test-skeleton.c"
|
