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Diffstat (limited to 'linuxthreads/tst-clock1.c')
| -rw-r--r-- | linuxthreads/tst-clock1.c | 202 |
1 files changed, 202 insertions, 0 deletions
diff --git a/linuxthreads/tst-clock1.c b/linuxthreads/tst-clock1.c new file mode 100644 index 0000000000..bca40956e2 --- /dev/null +++ b/linuxthreads/tst-clock1.c @@ -0,0 +1,202 @@ +/* Copyright (C) 2003, 2004 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, write to the Free + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA + 02111-1307 USA. */ + +#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" |