1#!/bin/sh 2 3# 4# Copyright (c) 2013 EMC Corp. 5# All rights reserved. 6# 7# Redistribution and use in source and binary forms, with or without 8# modification, are permitted provided that the following conditions 9# are met: 10# 1. Redistributions of source code must retain the above copyright 11# notice, this list of conditions and the following disclaimer. 12# 2. Redistributions in binary form must reproduce the above copyright 13# notice, this list of conditions and the following disclaimer in the 14# documentation and/or other materials provided with the distribution. 15# 16# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 17# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 18# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19# ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 20# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26# SUCH DAMAGE. 27# 28 29# A simplistic regression test for r200510: 30 31[ `sysctl -n kern.hz` -lt 1000 ] && exit 0 32 33. ../default.cfg 34 35here=`pwd` 36cd /tmp 37sed '1,/^EOF/d' < $here/$0 > nanosleep.c 38mycc -o nanosleep -Wall -Wextra nanosleep.c || exit 1 39rm -f nanosleep.c 40 41/tmp/nanosleep && s=0 || s=$? 42 43rm -f /tmp/nanosleep 44exit $s 45EOF 46#include <sys/limits.h> 47#include <sys/time.h> 48 49#include <err.h> 50#include <stdio.h> 51#include <strings.h> 52#include <time.h> 53 54#define N 20000 55 56int 57main(void) 58{ 59 struct timespec rmt, rqt; 60 struct timespec finish, start, res; 61 long m; 62 int i; 63 64 m = LONG_MAX; 65 for (i = 0; i < 100; i++) { 66 rqt.tv_sec = 0; 67 rqt.tv_nsec = N; 68 clock_gettime(CLOCK_REALTIME_PRECISE, &start); 69 if (nanosleep(&rqt, &rmt) == -1) 70 err(1, "nanosleep"); 71 clock_gettime(CLOCK_REALTIME_PRECISE, &finish); 72 timespecsub(&finish, &start, &res); 73 if (res.tv_nsec < N) 74 errx(1, "Short sleep: %ld", res.tv_nsec); 75// fprintf(stderr, "asked for %f, got %f\n", (double)N / 1e9, 76// (double)res.tv_nsec / 1e9); 77 if (m > res.tv_nsec) 78 m = res.tv_nsec; 79 } 80 if (m > 2 * N) { 81 fprintf(stderr, "nanosleep(%fs). Best value is %fs.\n", 82 (double)N / 1e9, (double)m / 1e9); 83 errx(1, "FAIL"); 84 } 85 86 return (0); 87} 88