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/* Copyright (C) 2003, 2004 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2003.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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#if defined _POSIX_THREAD_CPUTIME && _POSIX_THREAD_CPUTIME >= 0
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static pthread_barrier_t b2;
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static pthread_barrier_t bN;
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int e = pthread_barrier_wait (&b2);
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if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
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puts ("barrier_wait failed");
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e = pthread_barrier_wait (&bN);
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if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
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puts ("barrier_wait failed");
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#if defined _POSIX_THREAD_CPUTIME && _POSIX_THREAD_CPUTIME >= 0
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# if _POSIX_THREAD_CPUTIME == 0
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if (sysconf (_SC_THREAD_CPUTIME) < 0)
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puts ("_POSIX_THREAD_CPUTIME option not available");
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if (pthread_barrier_init (&b2, NULL, 2) != 0
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|| pthread_barrier_init (&bN, NULL, N + 1) != 0)
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puts ("barrier_init failed");
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struct timespec ts = { .tv_sec = 0, .tv_nsec = 100000000 };
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TEMP_FAILURE_RETRY (nanosleep (&ts, &ts));
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# ifndef CLOCK_THREAD_CPUTIME_ID
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if (pthread_getcpuclockid (pthread_self (), &cl[0]) != 0)
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puts ("own pthread_getcpuclockid failed");
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cl[0] = CLOCK_THREAD_CPUTIME_ID;
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if (pthread_attr_init (&at) != 0)
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puts ("attr_init failed");
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if (pthread_attr_setstacksize (&at, 1 * 1024 * 1024) != 0)
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puts ("attr_setstacksize failed");
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for (i = 0; i < N; ++i)
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if (pthread_create (&th[i], &at, tf, NULL) != 0)
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puts ("create failed");
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e = pthread_barrier_wait (&b2);
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if (e != 0 && e != PTHREAD_BARRIER_SERIAL_THREAD)
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puts ("barrier_wait failed");
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ts.tv_nsec = 100000000;
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TEMP_FAILURE_RETRY (nanosleep (&ts, &ts));
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if (pthread_getcpuclockid (th[i], &cl[i + 1]) != 0)
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puts ("pthread_getcpuclockid failed");
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if (pthread_attr_destroy (&at) != 0)
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puts ("attr_destroy failed");
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struct timespec t[N + 1];
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for (i = 0; i < N + 1; ++i)
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if (clock_gettime (cl[i], &t[i]) != 0)
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printf ("clock_gettime round %d failed\n", i);
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for (i = 0; i < N; ++i)
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struct timespec diff;
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diff.tv_sec = t[i].tv_sec - t[i + 1].tv_sec;
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diff.tv_nsec = t[i].tv_nsec - t[i + 1].tv_nsec;
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if (diff.tv_nsec < 0)
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diff.tv_nsec += 1000000000;
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if (diff.tv_sec < 0 || (diff.tv_sec == 0 && diff.tv_nsec < 100000000))
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difference between thread %d and %d too small (%ld.%09ld)\n",
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i, i + 1, (long int) diff.tv_sec, (long int) diff.tv_nsec);
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printf ("diff %d->%d: %ld.%09ld\n",
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i, i + 1, (long int) diff.tv_sec, (long int) diff.tv_nsec);
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for (i = 0; i < N + 1; ++i)
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if (clock_settime (cl[i], &ts) != 0)
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printf ("clock_settime(%d) round %d failed\n", cl[i], i);
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for (i = 0; i < N + 1; ++i)
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if (clock_gettime (cl[i], &ts) != 0)
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puts ("clock_gettime failed");
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if (ts.tv_sec > t[i].tv_sec
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|| (ts.tv_sec == t[i].tv_sec && ts.tv_nsec > t[i].tv_nsec))
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puts ("clock_settime didn't reset clock");
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#define TEST_FUNCTION do_test ()
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#include "../test-skeleton.c"