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