ntptime.html revision 132451 
1132451Sroberto<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
2132451Sroberto
3132451Sroberto<html>
4132451Sroberto
5132451Sroberto    <head>
6132451Sroberto        <meta name="generator" content="HTML Tidy, see www.w3.org">
7132451Sroberto        <title>ntptime - read kernel time variables</title>
8132451Sroberto        <link href="scripts/style.css" type="text/css" rel="stylesheet">
9132451Sroberto    </head>
10132451Sroberto
11132451Sroberto    <body>
12132451Sroberto        <h3><tt>ntptime</tt> - read kernel time variables</h3>
13132451Sroberto        <img src="pic/pogo5.gif" alt="gif" align="left"><a href="http://www.eecis.udel.edu/~mills/pictures.html">from <i>Pogo</i>, Walt Kelly</a>
14132451Sroberto        <p>The turtle has been swimming in the kernel.</p>
15132451Sroberto        <p>Last update: <csobj format="ShortTime" h="24" locale="00000409" region="0" t="DateTime" w="50">20:19</csobj> UTC <csobj format="LongDate" h="24" locale="00000409" region="0" t="DateTime" w="257">Monday, December 02, 2002</csobj></p>
16132451Sroberto        <br clear="left">
17132451Sroberto        <hr>
18132451Sroberto        <h4>Synopsis</h4>
19132451Sroberto        <tt>ntptime [ -chr ] [ -e <i>est_error</i> ] [ -f <i>frequency</i> ] [ -m <i>max_error</i> ] [ -o <i>offset</i> ] [ -s <i>status</i> ] [ -t <i>time_constant</i>]</tt>
20132451Sroberto        <h4>Description</h4>
21132451Sroberto        <p>This program is useful only with special kernels described in the <a href="kern.html">A Kernel Model for Precision Timekeeping</a> page. It reads and displays time-related kernel variables using the <tt>ntp_gettime()</tt> system call. A similar display can be obtained using the <tt>ntpdc</tt> program and <tt>kerninfo</tt> command.</p>
22132451Sroberto        <h4>Options</h4>
23132451Sroberto        <dl>
24132451Sroberto            <dt><tt>-c</tt>
25132451Sroberto            <dd>Display the execution time of <tt>ntptime</tt> itself.
26132451Sroberto            <dt><tt>-e <i>est_error</i></tt>
27132451Sroberto            <dd>Specify estimated error, in microseconds.
28132451Sroberto            <dt><tt>-f <i>frequency</i></tt>
29132451Sroberto            <dd>Specify frequency offset, in parts per million.
30132451Sroberto            <dt><tt>-h</tt>
31132451Sroberto            <dd>Display help information.
32132451Sroberto            <dt><tt>-m <i>max_error</i></tt>
33132451Sroberto            <dd>Specify max possible errors, in microseconds.
34132451Sroberto            <dt><tt>-o <i>offset</i></tt>
35132451Sroberto            <dd>Specify clock offset, in microseconds.
36132451Sroberto            <dt><tt>-r</tt>
37132451Sroberto            <dd>Display Unix and NTP times in raw format.
38132451Sroberto            <dt><tt>-s <i>status</i></tt>
39132451Sroberto            <dd>Specify clock status. Better know what you are doing.
40132451Sroberto            <dt><tt>-t <i>time_constant</i></tt>
41132451Sroberto            <dd>Specify time constant, an integer in the range 0-10.
42132451Sroberto        </dl>
43132451Sroberto        <hr>
44132451Sroberto        <script type="text/javascript" language="javascript" src="scripts/footer.txt"></script>
45132451Sroberto    </body>
46132451Sroberto
47132451Sroberto</html>