1 | /* Copyright (C) 2003-2022 Free Software Foundation, Inc. |
2 | This file is part of the GNU C Library. |
3 | |
4 | The GNU C Library is free software; you can redistribute it and/or |
5 | modify it under the terms of the GNU Lesser General Public |
6 | License as published by the Free Software Foundation; either |
7 | version 2.1 of the License, or (at your option) any later version. |
8 | |
9 | The GNU C Library is distributed in the hope that it will be useful, |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
12 | Lesser General Public License for more details. |
13 | |
14 | You should have received a copy of the GNU Lesser General Public |
15 | License along with the GNU C Library; if not, see |
16 | <https://www.gnu.org/licenses/>. */ |
17 | |
18 | #include <errno.h> |
19 | #include <pthread.h> |
20 | #include <stdio.h> |
21 | #include <stdlib.h> |
22 | #include <time.h> |
23 | #include <unistd.h> |
24 | |
25 | |
26 | #if defined _POSIX_THREAD_CPUTIME && _POSIX_THREAD_CPUTIME >= 0 |
27 | static pthread_barrier_t b2; |
28 | static pthread_barrier_t bN; |
29 | |
30 | |
31 | static void * |
32 | tf (void *arg) |
33 | { |
34 | int e = pthread_barrier_wait (barrier: &b2); |
35 | if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) |
36 | { |
37 | puts (s: "barrier_wait failed" ); |
38 | exit (1); |
39 | } |
40 | |
41 | e = pthread_barrier_wait (barrier: &bN); |
42 | if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) |
43 | { |
44 | puts (s: "barrier_wait failed" ); |
45 | exit (1); |
46 | } |
47 | |
48 | return NULL; |
49 | } |
50 | #endif |
51 | |
52 | |
53 | int |
54 | do_test (void) |
55 | { |
56 | #if defined _POSIX_THREAD_CPUTIME && _POSIX_THREAD_CPUTIME >= 0 |
57 | # define N 10 |
58 | |
59 | # if _POSIX_THREAD_CPUTIME == 0 |
60 | if (sysconf (_SC_THREAD_CPUTIME) < 0) |
61 | { |
62 | puts (s: "_POSIX_THREAD_CPUTIME option not available" ); |
63 | return 0; |
64 | } |
65 | # endif |
66 | |
67 | if (pthread_barrier_init (barrier: &b2, NULL, count: 2) != 0 |
68 | || pthread_barrier_init (barrier: &bN, NULL, N + 1) != 0) |
69 | { |
70 | puts (s: "barrier_init failed" ); |
71 | return 1; |
72 | } |
73 | |
74 | struct timespec ts = { .tv_sec = 0, .tv_nsec = 100000000 }; |
75 | TEMP_FAILURE_RETRY (nanosleep (&ts, &ts)); |
76 | |
77 | pthread_t th[N + 1]; |
78 | clockid_t cl[N + 1]; |
79 | # ifndef CLOCK_THREAD_CPUTIME_ID |
80 | if (pthread_getcpuclockid (pthread_self (), &cl[0]) != 0) |
81 | { |
82 | puts ("own pthread_getcpuclockid failed" ); |
83 | return 1; |
84 | } |
85 | # else |
86 | cl[0] = CLOCK_THREAD_CPUTIME_ID; |
87 | # endif |
88 | |
89 | pthread_attr_t at; |
90 | |
91 | if (pthread_attr_init (attr: &at) != 0) |
92 | { |
93 | puts (s: "attr_init failed" ); |
94 | return 1; |
95 | } |
96 | |
97 | if (pthread_attr_setstacksize (attr: &at, stacksize: 1 * 1024 * 1024) != 0) |
98 | { |
99 | puts (s: "attr_setstacksize failed" ); |
100 | return 1; |
101 | } |
102 | |
103 | int i; |
104 | int e; |
105 | for (i = 0; i < N; ++i) |
106 | { |
107 | if (pthread_create (newthread: &th[i], attr: &at, start_routine: tf, NULL) != 0) |
108 | { |
109 | puts (s: "create failed" ); |
110 | return 1; |
111 | } |
112 | |
113 | e = pthread_barrier_wait (barrier: &b2); |
114 | if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD) |
115 | { |
116 | puts (s: "barrier_wait failed" ); |
117 | return 1; |
118 | } |
119 | |
120 | ts.tv_sec = 0; |
121 | ts.tv_nsec = 100000000; |
122 | TEMP_FAILURE_RETRY (nanosleep (&ts, &ts)); |
123 | |
124 | if (pthread_getcpuclockid (thread_id: th[i], clock_id: &cl[i + 1]) != 0) |
125 | { |
126 | puts (s: "pthread_getcpuclockid failed" ); |
127 | return 1; |
128 | } |
129 | } |
130 | |
131 | if (pthread_attr_destroy (attr: &at) != 0) |
132 | { |
133 | puts (s: "attr_destroy failed" ); |
134 | return 1; |
135 | } |
136 | |
137 | struct timespec t[N + 1]; |
138 | for (i = 0; i < N + 1; ++i) |
139 | if (clock_gettime (clock_id: cl[i], tp: &t[i]) != 0) |
140 | { |
141 | printf (format: "clock_gettime round %d failed\n" , i); |
142 | return 1; |
143 | } |
144 | |
145 | for (i = 0; i < N; ++i) |
146 | { |
147 | struct timespec diff; |
148 | |
149 | diff.tv_sec = t[i].tv_sec - t[i + 1].tv_sec; |
150 | diff.tv_nsec = t[i].tv_nsec - t[i + 1].tv_nsec; |
151 | if (diff.tv_nsec < 0) |
152 | { |
153 | diff.tv_nsec += 1000000000; |
154 | --diff.tv_sec; |
155 | } |
156 | |
157 | if (diff.tv_sec < 0 || (diff.tv_sec == 0 && diff.tv_nsec < 100000000)) |
158 | { |
159 | printf (format: "\ |
160 | difference between thread %d and %d too small (%ld.%09ld)\n" , |
161 | i, i + 1, (long int) diff.tv_sec, (long int) diff.tv_nsec); |
162 | return 1; |
163 | } |
164 | |
165 | printf (format: "diff %d->%d: %ld.%09ld\n" , |
166 | i, i + 1, (long int) diff.tv_sec, (long int) diff.tv_nsec); |
167 | } |
168 | |
169 | ts.tv_sec = 0; |
170 | ts.tv_nsec = 0; |
171 | for (i = 0; i < N + 1; ++i) |
172 | if (clock_settime (clock_id: cl[i], tp: &ts) != 0) |
173 | { |
174 | printf (format: "clock_settime(%d) round %d failed\n" , cl[i], i); |
175 | return 1; |
176 | } |
177 | |
178 | for (i = 0; i < N + 1; ++i) |
179 | { |
180 | if (clock_gettime (clock_id: cl[i], tp: &ts) != 0) |
181 | { |
182 | puts (s: "clock_gettime failed" ); |
183 | return 1; |
184 | } |
185 | |
186 | if (ts.tv_sec > t[i].tv_sec |
187 | || (ts.tv_sec == t[i].tv_sec && ts.tv_nsec > t[i].tv_nsec)) |
188 | { |
189 | puts (s: "clock_settime didn't reset clock" ); |
190 | return 1; |
191 | } |
192 | } |
193 | #endif |
194 | |
195 | return 0; |
196 | } |
197 | |
198 | |
199 | #define TEST_FUNCTION do_test () |
200 | #include "../test-skeleton.c" |
201 | |