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5 <title>ntptime - read kernel time variables</title>
8 <h3><tt>ntptime</tt> - read kernel time variables</h3>
10 <img align="left" src="pic/pogo5.gif" alt="gif"><a href=
11 "http://www.eecis.udel.edu/~mills/pictures.htm">from <i>Pogo</i>,
14 <p>The turtle is been swimming in the kernel.<br clear="left">
20 <tt>ntptime [ -chr ] [ -e <i>est_error</i> ] [ -f <i>frequency</i>
21 ] [ -m <i>max_error</i> ] [ -o <i>offset</i> ] [ -s <i>status</i> ]
22 [ -t <i>time_constant</i>]</tt>
26 This program is useful only with special kernels described in the
27 <a href="kern.htm">A Kernel Model for Precision Timekeeping</a>
28 page. It reads and displays time-related kernel variables using the
29 <tt>ntp_gettime()</tt> system call. A similar display can be
30 obtained using the <tt>ntpdc</tt> program and <tt>kerninfo</tt>
38 <dd>Display the execution time of <tt>ntptime</tt> itself.</dd>
40 <dt><tt>-e <i>est_error</i></tt></dt>
42 <dd>Specify estimated error, in microseconds.</dd>
44 <dt><tt>-f <i>frequency</i></tt></dt>
46 <dd>Specify frequency offset, in parts per million.</dd>
50 <dd>Display help information.</dd>
52 <dt><tt>-m <i>max_error</i></tt></dt>
54 <dd>Specify max possible errors, in microseconds.</dd>
56 <dt><tt>-o <i>offset</i></tt></dt>
58 <dd>Specify clock offset, in microseconds.</dd>
62 <dd>Display Unix and NTP times in raw format.</dd>
64 <dt><tt>-s <i>status</i></tt></dt>
66 <dd>Specify clock status. Better know what you are doing.</dd>
68 <dt><tt>-t <i>time_constant</i></tt></dt>
70 <dd>Specify time constant, an integer in the range 0-10.</dd>
74 <a href="index.htm"><img align="left" src="pic/home.gif" alt=
76 <address><a href="mailto:mills@udel.edu">David L. Mills
77 <mills@udel.edu></a></address>