1 /* Copyright (C) 2003-2023 Free Software Foundation, Inc.
2 This file is part of the GNU C Library.
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.
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.
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/>. */
26 #if defined _POSIX_THREAD_CPUTIME && _POSIX_THREAD_CPUTIME >= 0
27 static pthread_barrier_t b2;
28 static pthread_barrier_t bN;
34 int e = pthread_barrier_wait (&b2);
35 if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
37 puts ("barrier_wait failed");
41 e = pthread_barrier_wait (&bN);
42 if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
44 puts ("barrier_wait failed");
56 #if defined _POSIX_THREAD_CPUTIME && _POSIX_THREAD_CPUTIME >= 0
59 # if _POSIX_THREAD_CPUTIME == 0
60 if (sysconf (_SC_THREAD_CPUTIME) < 0)
62 puts ("_POSIX_THREAD_CPUTIME option not available");
67 if (pthread_barrier_init (&b2, NULL, 2) != 0
68 || pthread_barrier_init (&bN, NULL, N + 1) != 0)
70 puts ("barrier_init failed");
74 struct timespec ts = { .tv_sec = 0, .tv_nsec = 100000000 };
75 TEMP_FAILURE_RETRY (nanosleep (&ts, &ts));
79 # ifndef CLOCK_THREAD_CPUTIME_ID
80 if (pthread_getcpuclockid (pthread_self (), &cl[0]) != 0)
82 puts ("own pthread_getcpuclockid failed");
86 cl[0] = CLOCK_THREAD_CPUTIME_ID;
91 if (pthread_attr_init (&at) != 0)
93 puts ("attr_init failed");
97 if (pthread_attr_setstacksize (&at, 1 * 1024 * 1024) != 0)
99 puts ("attr_setstacksize failed");
105 for (i = 0; i < N; ++i)
107 if (pthread_create (&th[i], &at, tf, NULL) != 0)
109 puts ("create failed");
113 e = pthread_barrier_wait (&b2);
114 if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
116 puts ("barrier_wait failed");
121 ts.tv_nsec = 100000000;
122 TEMP_FAILURE_RETRY (nanosleep (&ts, &ts));
124 if (pthread_getcpuclockid (th[i], &cl[i + 1]) != 0)
126 puts ("pthread_getcpuclockid failed");
131 if (pthread_attr_destroy (&at) != 0)
133 puts ("attr_destroy failed");
137 struct timespec t[N + 1];
138 for (i = 0; i < N + 1; ++i)
139 if (clock_gettime (cl[i], &t[i]) != 0)
141 printf ("clock_gettime round %d failed\n", i);
145 for (i = 0; i < N; ++i)
147 struct timespec diff;
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)
153 diff.tv_nsec += 1000000000;
157 if (diff.tv_sec < 0 || (diff.tv_sec == 0 && diff.tv_nsec < 100000000))
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);
165 printf ("diff %d->%d: %ld.%09ld\n",
166 i, i + 1, (long int) diff.tv_sec, (long int) diff.tv_nsec);
171 for (i = 0; i < N + 1; ++i)
172 if (clock_settime (cl[i], &ts) != 0)
174 printf ("clock_settime(%d) round %d failed\n", cl[i], i);
178 for (i = 0; i < N + 1; ++i)
180 if (clock_gettime (cl[i], &ts) != 0)
182 puts ("clock_gettime failed");
186 if (ts.tv_sec > t[i].tv_sec
187 || (ts.tv_sec == t[i].tv_sec && ts.tv_nsec > t[i].tv_nsec))
189 puts ("clock_settime didn't reset clock");
199 #define TEST_FUNCTION do_test ()
200 #include "../test-skeleton.c"