47 lines
2.5 KiB
HTML
47 lines
2.5 KiB
HTML
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
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<html>
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<head>
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<meta name="generator" content="HTML Tidy, see www.w3.org">
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<title>ntptime - read kernel time variables</title>
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<link href="scripts/style.css" type="text/css" rel="stylesheet">
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</head>
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<body>
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<h3><tt>ntptime</tt> - read kernel time variables</h3>
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<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>
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<p>The turtle has been swimming in the kernel.</p>
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<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>
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<br clear="left">
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<hr>
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<h4>Synopsis</h4>
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<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>
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<h4>Description</h4>
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<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>
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<h4>Options</h4>
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<dl>
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<dt><tt>-c</tt>
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<dd>Display the execution time of <tt>ntptime</tt> itself.
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<dt><tt>-e <i>est_error</i></tt>
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<dd>Specify estimated error, in microseconds.
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<dt><tt>-f <i>frequency</i></tt>
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<dd>Specify frequency offset, in parts per million.
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<dt><tt>-h</tt>
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<dd>Display help information.
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<dt><tt>-m <i>max_error</i></tt>
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<dd>Specify max possible errors, in microseconds.
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<dt><tt>-o <i>offset</i></tt>
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<dd>Specify clock offset, in microseconds.
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<dt><tt>-r</tt>
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<dd>Display Unix and NTP times in raw format.
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<dt><tt>-s <i>status</i></tt>
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<dd>Specify clock status. Better know what you are doing.
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<dt><tt>-t <i>time_constant</i></tt>
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<dd>Specify time constant, an integer in the range 0-10.
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</dl>
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<hr>
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<script type="text/javascript" language="javascript" src="scripts/footer.txt"></script>
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</body>
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</html>
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