xref: /freebsd/tools/test/stress2/misc/nanosleep.sh (revision 8a272653d9fbd9fc37691c9aad6a05089b4ecb4d)
1*8a272653SPeter Holm#!/bin/sh
2*8a272653SPeter Holm
3*8a272653SPeter Holm#
4*8a272653SPeter Holm# Copyright (c) 2013 EMC Corp.
5*8a272653SPeter Holm# All rights reserved.
6*8a272653SPeter Holm#
7*8a272653SPeter Holm# Redistribution and use in source and binary forms, with or without
8*8a272653SPeter Holm# modification, are permitted provided that the following conditions
9*8a272653SPeter Holm# are met:
10*8a272653SPeter Holm# 1. Redistributions of source code must retain the above copyright
11*8a272653SPeter Holm#    notice, this list of conditions and the following disclaimer.
12*8a272653SPeter Holm# 2. Redistributions in binary form must reproduce the above copyright
13*8a272653SPeter Holm#    notice, this list of conditions and the following disclaimer in the
14*8a272653SPeter Holm#    documentation and/or other materials provided with the distribution.
15*8a272653SPeter Holm#
16*8a272653SPeter Holm# THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
17*8a272653SPeter Holm# ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18*8a272653SPeter Holm# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
19*8a272653SPeter Holm# ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
20*8a272653SPeter Holm# FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
21*8a272653SPeter Holm# DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
22*8a272653SPeter Holm# OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
23*8a272653SPeter Holm# HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
24*8a272653SPeter Holm# LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
25*8a272653SPeter Holm# OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
26*8a272653SPeter Holm# SUCH DAMAGE.
27*8a272653SPeter Holm#
28*8a272653SPeter Holm
29*8a272653SPeter Holm# A simplistic regression test for r200510:
30*8a272653SPeter Holm
31*8a272653SPeter Holm[ `sysctl -n kern.hz` -lt 1000 ] && exit 0
32*8a272653SPeter Holm
33*8a272653SPeter Holm. ../default.cfg
34*8a272653SPeter Holm
35*8a272653SPeter Holmhere=`pwd`
36*8a272653SPeter Holmcd /tmp
37*8a272653SPeter Holmsed '1,/^EOF/d' < $here/$0 > nanosleep.c
38*8a272653SPeter Holmmycc -o nanosleep -Wall -Wextra nanosleep.c || exit 1
39*8a272653SPeter Holmrm -f nanosleep.c
40*8a272653SPeter Holm
41*8a272653SPeter Holm/tmp/nanosleep && s=0 || s=$?
42*8a272653SPeter Holm
43*8a272653SPeter Holmrm -f /tmp/nanosleep
44*8a272653SPeter Holmexit $s
45*8a272653SPeter HolmEOF
46*8a272653SPeter Holm#include <sys/limits.h>
47*8a272653SPeter Holm#include <sys/time.h>
48*8a272653SPeter Holm
49*8a272653SPeter Holm#include <err.h>
50*8a272653SPeter Holm#include <stdio.h>
51*8a272653SPeter Holm#include <strings.h>
52*8a272653SPeter Holm#include <time.h>
53*8a272653SPeter Holm
54*8a272653SPeter Holm#define N 20000
55*8a272653SPeter Holm
56*8a272653SPeter Holmint
57*8a272653SPeter Holmmain(void)
58*8a272653SPeter Holm{
59*8a272653SPeter Holm	struct timespec rmt, rqt;
60*8a272653SPeter Holm	struct timespec finish, start, res;
61*8a272653SPeter Holm	long m;
62*8a272653SPeter Holm	int i;
63*8a272653SPeter Holm
64*8a272653SPeter Holm	m = LONG_MAX;
65*8a272653SPeter Holm	for (i = 0; i < 100; i++) {
66*8a272653SPeter Holm		rqt.tv_sec  = 0;
67*8a272653SPeter Holm		rqt.tv_nsec = N;
68*8a272653SPeter Holm		clock_gettime(CLOCK_REALTIME_PRECISE, &start);
69*8a272653SPeter Holm		if (nanosleep(&rqt, &rmt) == -1)
70*8a272653SPeter Holm			err(1, "nanosleep");
71*8a272653SPeter Holm		clock_gettime(CLOCK_REALTIME_PRECISE, &finish);
72*8a272653SPeter Holm		timespecsub(&finish, &start, &res);
73*8a272653SPeter Holm		if (res.tv_nsec < N)
74*8a272653SPeter Holm			errx(1, "Short sleep: %ld", res.tv_nsec);
75*8a272653SPeter Holm//		fprintf(stderr, "asked for %f, got %f\n", (double)N / 1e9,
76*8a272653SPeter Holm//		    (double)res.tv_nsec / 1e9);
77*8a272653SPeter Holm		if (m > res.tv_nsec)
78*8a272653SPeter Holm			m = res.tv_nsec;
79*8a272653SPeter Holm	}
80*8a272653SPeter Holm	if (m > 2 * N) {
81*8a272653SPeter Holm		fprintf(stderr, "nanosleep(%fs). Best value is %fs.\n",
82*8a272653SPeter Holm		    (double)N / 1e9, (double)m / 1e9);
83*8a272653SPeter Holm		errx(1, "FAIL");
84*8a272653SPeter Holm	}
85*8a272653SPeter Holm
86*8a272653SPeter Holm	return (0);
87*8a272653SPeter Holm}
88