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-rw-r--r--rt/tst-cpuclock2.c332
1 files changed, 0 insertions, 332 deletions
diff --git a/rt/tst-cpuclock2.c b/rt/tst-cpuclock2.c
deleted file mode 100644
index d1621f3..0000000
--- a/rt/tst-cpuclock2.c
+++ /dev/null
@@ -1,332 +0,0 @@
-/* Test program for process and thread CPU clocks.
- Copyright (C) 2005 Free Software Foundation, Inc.
- This file is part of the GNU C Library.
-
- 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 <unistd.h>
-
-#if (_POSIX_THREADS - 0) <= 0
-
-# define TEST_FUNCTION 0
-
-#else
-
-#include <stdio.h>
-#include <stdlib.h>
-#include <time.h>
-#include <fcntl.h>
-#include <string.h>
-#include <errno.h>
-#include <pthread.h>
-
-static pthread_barrier_t barrier;
-
-/* This function is intended to rack up both user and system time. */
-static void *
-chew_cpu (void *arg)
-{
- pthread_barrier_wait (&barrier);
-
- while (1)
- {
- static volatile char buf[4096];
- for (int i = 0; i < 100; ++i)
- for (size_t j = 0; j < sizeof buf; ++j)
- buf[j] = 0xaa;
- int nullfd = open ("/dev/null", O_WRONLY);
- for (int i = 0; i < 100; ++i)
- for (size_t j = 0; j < sizeof buf; ++j)
- buf[j] = 0xbb;
- write (nullfd, (char *) buf, sizeof buf);
- close (nullfd);
- }
-
- return NULL;
-}
-
-static unsigned long long int
-tsdiff (const struct timespec *before, const struct timespec *after)
-{
- struct timespec diff = { .tv_sec = after->tv_sec - before->tv_sec,
- .tv_nsec = after->tv_nsec - before->tv_nsec };
- while (diff.tv_nsec < 0)
- {
- --diff.tv_sec;
- diff.tv_nsec += 1000000000;
- }
- return diff.tv_sec * 1000000000ULL + diff.tv_nsec;
-}
-
-static unsigned long long int
-test_nanosleep (clockid_t clock, const char *which,
- const struct timespec *before, int *bad)
-{
- const struct timespec sleeptime = { .tv_nsec = 100000000 };
- int e = clock_nanosleep (clock, 0, &sleeptime, NULL);
- if (e == EINVAL || e == ENOTSUP || e == ENOSYS)
- {
- printf ("clock_nanosleep not supported for %s CPU clock: %s\n",
- which, strerror (e));
- return 0;
- }
- if (e != 0)
- {
- printf ("clock_nanosleep on %s CPU clock: %s\n", which, strerror (e));
- *bad = 1;
- return 0;
- }
-
- struct timespec after;
- if (clock_gettime (clock, &after) < 0)
- {
- printf ("clock_gettime on %s CPU clock %lx => %s\n",
- which, (unsigned long int) clock, strerror (errno));
- *bad = 1;
- return 0;
- }
-
- unsigned long long int diff = tsdiff (before, &after);
- if (diff < sleeptime.tv_nsec || diff > sleeptime.tv_nsec * 2)
- {
- printf ("clock_nanosleep on %s slept %llu (outside reasonable range)\n",
- which, diff);
- *bad = 1;
- return diff;
- }
-
- struct timespec sleeptimeabs = sleeptime;
- sleeptimeabs.tv_sec += after.tv_sec;
- sleeptimeabs.tv_nsec += after.tv_nsec;
- while (sleeptimeabs.tv_nsec > 1000000000)
- {
- ++sleeptimeabs.tv_sec;
- sleeptimeabs.tv_nsec -= 1000000000;
- }
- e = clock_nanosleep (clock, TIMER_ABSTIME, &sleeptimeabs, NULL);
- if (e != 0)
- {
- printf ("absolute clock_nanosleep on %s CPU clock: %s\n",
- which, strerror (e));
- *bad = 1;
- return diff;
- }
-
- struct timespec afterabs;
- if (clock_gettime (clock, &afterabs) < 0)
- {
- printf ("clock_gettime on %s CPU clock %lx => %s\n",
- which, (unsigned long int) clock, strerror (errno));
- *bad = 1;
- return diff;
- }
-
- unsigned long long int sleepdiff = tsdiff (&sleeptimeabs, &afterabs);
- if (sleepdiff > sleeptime.tv_nsec)
- {
- printf ("\
-absolute clock_nanosleep on %s %llu past target (outside reasonable range)\n",
- which, sleepdiff);
- *bad = 1;
- }
-
- unsigned long long int diffabs = tsdiff (&after, &afterabs);
- if (diffabs < sleeptime.tv_nsec || diffabs > sleeptime.tv_nsec * 2)
- {
- printf ("\
-absolute clock_nanosleep on %s slept %llu (outside reasonable range)\n",
- which, diffabs);
- *bad = 1;
- }
-
- return diff + diffabs;
-}
-
-
-
-static int
-do_test (void)
-{
- int result = 0;
- clockid_t process_clock, th_clock, my_thread_clock;
- int e;
- pthread_t th;
-
- e = clock_getcpuclockid (0, &process_clock);
- if (e != 0)
- {
- printf ("clock_getcpuclockid on self => %s\n", strerror (e));
- return 1;
- }
-
- e = pthread_getcpuclockid (pthread_self (), &my_thread_clock);
- if (e != 0)
- {
- printf ("pthread_getcpuclockid on self => %s\n", strerror (e));
- return 1;
- }
-
- /* This is a kludge. This test fails if the semantics of thread and
- process clocks are wrong. The old code using hp-timing without kernel
- support has bogus semantics if there are context switches. We don't
- fail to report failure when the proper functionality is not available
- in the kernel. It so happens that Linux kernels without correct CPU
- clock support also lack CPU timer support, so we use use that to guess
- that we are using the bogus code and not test it. */
- timer_t t;
- if (timer_create (my_thread_clock, NULL, &t) != 0)
- {
- printf ("timer_create: %m\n");
- puts ("No support for CPU clocks with good semantics, skipping test");
- return 0;
- }
- timer_delete (t);
-
-
- pthread_barrier_init (&barrier, NULL, 2);
-
- e = pthread_create (&th, NULL, chew_cpu, NULL);
- if (e != 0)
- {
- printf ("pthread_create: %s\n", strerror (e));
- return 1;
- }
-
- e = pthread_getcpuclockid (th, &th_clock);
- if (e == ENOENT || e == ENOSYS || e == ENOTSUP)
- {
- puts ("pthread_getcpuclockid does not support other threads");
- return 1;
- }
-
- pthread_barrier_wait (&barrier);
-
- struct timespec res;
- if (clock_getres (th_clock, &res) < 0)
- {
- printf ("clock_getres on thread clock %lx => %s\n",
- (unsigned long int) th_clock, strerror (errno));
- result = 1;
- return 1;
- }
- printf ("live thread clock %lx resolution %lu.%.9lu\n",
- (unsigned long int) th_clock, res.tv_sec, res.tv_nsec);
-
- struct timespec process_before, process_after;
- if (clock_gettime (process_clock, &process_before) < 0)
- {
- printf ("clock_gettime on process clock %lx => %s\n",
- (unsigned long int) th_clock, strerror (errno));
- return 1;
- }
-
- struct timespec before, after;
- if (clock_gettime (th_clock, &before) < 0)
- {
- printf ("clock_gettime on live thread clock %lx => %s\n",
- (unsigned long int) th_clock, strerror (errno));
- return 1;
- }
- printf ("live thread before sleep => %lu.%.9lu\n",
- before.tv_sec, before.tv_nsec);
-
- struct timespec me_before, me_after;
- if (clock_gettime (my_thread_clock, &me_before) < 0)
- {
- printf ("clock_gettime on live thread clock %lx => %s\n",
- (unsigned long int) th_clock, strerror (errno));
- return 1;
- }
- printf ("self thread before sleep => %lu.%.9lu\n",
- me_before.tv_sec, me_before.tv_nsec);
-
- struct timespec sleeptime = { .tv_nsec = 500000000 };
- nanosleep (&sleeptime, NULL);
-
- if (clock_gettime (th_clock, &after) < 0)
- {
- printf ("clock_gettime on live thread clock %lx => %s\n",
- (unsigned long int) th_clock, strerror (errno));
- return 1;
- }
- printf ("live thread after sleep => %lu.%.9lu\n",
- after.tv_sec, after.tv_nsec);
-
- if (clock_gettime (process_clock, &process_after) < 0)
- {
- printf ("clock_gettime on process clock %lx => %s\n",
- (unsigned long int) th_clock, strerror (errno));
- return 1;
- }
-
- if (clock_gettime (my_thread_clock, &me_after) < 0)
- {
- printf ("clock_gettime on live thread clock %lx => %s\n",
- (unsigned long int) th_clock, strerror (errno));
- return 1;
- }
- printf ("self thread after sleep => %lu.%.9lu\n",
- me_after.tv_sec, me_after.tv_nsec);
-
- unsigned long long int th_diff = tsdiff (&before, &after);
- unsigned long long int pdiff = tsdiff (&process_before, &process_after);
- unsigned long long int my_diff = tsdiff (&me_before, &me_after);
-
- if (th_diff < 100000000 || th_diff > 600000000)
- {
- printf ("thread before - after %llu outside reasonable range\n",
- th_diff);
- result = 1;
- }
-
- if (my_diff > 100000000)
- {
- printf ("self thread before - after %llu outside reasonable range\n",
- my_diff);
- result = 1;
- }
-
- if (pdiff < th_diff)
- {
- printf ("process before - after %llu outside reasonable range (%llu)\n",
- pdiff, th_diff);
- result = 1;
- }
-
- process_after.tv_nsec += test_nanosleep (th_clock, "thread",
- &after, &result);
- process_after.tv_nsec += test_nanosleep (process_clock, "process",
- &process_after, &result);
- test_nanosleep (CLOCK_PROCESS_CPUTIME_ID,
- "PROCESS_CPUTIME_ID", &process_after, &result);
-
- pthread_cancel (th);
-
- e = clock_nanosleep (CLOCK_THREAD_CPUTIME_ID, 0, &sleeptime, NULL);
- if (e != EINVAL)
- {
- printf ("clock_nanosleep CLOCK_THREAD_CPUTIME_ID: %s\n",
- strerror (e));
- result = 1;
- }
-
- return result;
-}
-# define TIMEOUT 8
-# define TEST_FUNCTION do_test ()
-#endif
-
-#include "../test-skeleton.c"
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