From a334319f6530564d22e775935d9c91663623a1b4 Mon Sep 17 00:00:00 2001 From: Ulrich Drepper Date: Wed, 22 Dec 2004 20:10:10 +0000 Subject: (CFLAGS-tst-align.c): Add -mpreferred-stack-boundary=4. --- rt/tst-cpuclock2.c | 332 ----------------------------------------------------- 1 file changed, 332 deletions(-) delete mode 100644 rt/tst-cpuclock2.c (limited to 'rt/tst-cpuclock2.c') diff --git a/rt/tst-cpuclock2.c b/rt/tst-cpuclock2.c deleted file mode 100644 index d1621f3d01..0000000000 --- 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 - -#if (_POSIX_THREADS - 0) <= 0 - -# define TEST_FUNCTION 0 - -#else - -#include -#include -#include -#include -#include -#include -#include - -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" -- cgit v1.2.3