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88 lines
2.5 KiB
Bash
Executable File
88 lines
2.5 KiB
Bash
Executable File
#!/bin/sh
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#
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# Copyright (c) 2013 EMC Corp.
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# All rights reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions
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# are met:
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# 1. Redistributions of source code must retain the above copyright
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# notice, this list of conditions and the following disclaimer.
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# 2. Redistributions in binary form must reproduce the above copyright
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# notice, this list of conditions and the following disclaimer in the
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# documentation and/or other materials provided with the distribution.
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#
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# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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# SUCH DAMAGE.
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#
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# A simplistic regression test for r200510:
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[ `sysctl -n kern.hz` -lt 1000 ] && exit 0
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. ../default.cfg
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here=`pwd`
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cd /tmp
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sed '1,/^EOF/d' < $here/$0 > nanosleep.c
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mycc -o nanosleep -Wall -Wextra nanosleep.c || exit 1
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rm -f nanosleep.c
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/tmp/nanosleep && s=0 || s=$?
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rm -f /tmp/nanosleep
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exit $s
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EOF
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#include <sys/limits.h>
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#include <sys/time.h>
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#include <err.h>
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#include <stdio.h>
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#include <strings.h>
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#include <time.h>
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#define N 20000
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int
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main(void)
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{
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struct timespec rmt, rqt;
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struct timespec finish, start, res;
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long m;
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int i;
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m = LONG_MAX;
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for (i = 0; i < 100; i++) {
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rqt.tv_sec = 0;
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rqt.tv_nsec = N;
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clock_gettime(CLOCK_REALTIME_PRECISE, &start);
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if (nanosleep(&rqt, &rmt) == -1)
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err(1, "nanosleep");
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clock_gettime(CLOCK_REALTIME_PRECISE, &finish);
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timespecsub(&finish, &start, &res);
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if (res.tv_nsec < N)
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errx(1, "Short sleep: %ld", res.tv_nsec);
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// fprintf(stderr, "asked for %f, got %f\n", (double)N / 1e9,
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// (double)res.tv_nsec / 1e9);
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if (m > res.tv_nsec)
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m = res.tv_nsec;
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}
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if (m > 2 * N) {
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fprintf(stderr, "nanosleep(%fs). Best value is %fs.\n",
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(double)N / 1e9, (double)m / 1e9);
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errx(1, "FAIL");
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}
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return (0);
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}
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