1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 2 3<html> 4 5 <head> 6 <meta http-equiv="content-type" content="text/html;charset=iso-8859-1"> 7 <meta name="generator" content="HTML Tidy, see www.w3.org"> 8 <title>ntptime - read kernel time variables</title> 9 <link href="scripts/style.css" type="text/css" rel="stylesheet"> 10 </head> 11 12 <body> 13 <h3><tt>ntptime</tt> - read kernel time variables</h3> 14 <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> 15 <p>The turtle has been swimming in the kernel.</p> 16 <p>Last update: <csobj format="ShortTime" h="25" locale="00000409" region="0" t="DateTime" w="61">18:46</csobj> UTC <csobj format="LongDate" h="25" locale="00000409" region="0" t="DateTime" w="246">Thursday, July 28, 2005</csobj></p> 17 <br clear="left"> 18 <hr> 19 <h4>Synopsis</h4> 20 <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> 21 <h4>Description</h4> 22 <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> 23 <h4>Options</h4> 24 <dl> 25 <dt><tt>-c</tt> 26 <dd>Display the execution time of <tt>ntptime</tt> itself. 27 <dt><tt>-e <i>est_error</i></tt> 28 <dd>Specify estimated error, in microseconds. 29 <dt><tt>-f <i>frequency</i></tt> 30 <dd>Specify frequency offset, in parts per million. 31 <dt><tt>-h</tt> 32 <dd>Display help information. 33 <dt><tt>-m <i>max_error</i></tt> 34 <dd>Specify max possible errors, in microseconds. 35 <dt><tt>-o <i>offset</i></tt> 36 <dd>Specify clock offset, in microseconds. 37 <dt><tt>-r</tt> 38 <dd>Display Unix and NTP times in raw format. 39 <dt><tt>-s <i>status</i></tt> 40 <dd>Specify clock status. Better know what you are doing. 41 <dt><tt>-t <i>time_constant</i></tt> 42 <dd>Specify time constant, an integer in the range 0-10. 43 </dl> 44 <hr> 45 <script type="text/javascript" language="javascript" src="scripts/footer.txt"></script> 46 </body> 47 48</html>
