19c2daa00SOllivier Robert<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> 29c2daa00SOllivier Robert<html> 39c2daa00SOllivier Robert<head> 4ea906c41SOllivier Robert<meta http-equiv="content-type" content="text/html;charset=iso-8859-1"> 59c2daa00SOllivier Robert<meta name="generator" content="HTML Tidy, see www.w3.org"> 6*2b15cb3dSCy Schubert<title>ntptime - read and set kernel time variables</title> 79c2daa00SOllivier Robert<link href="scripts/style.css" type="text/css" rel="stylesheet"> 89c2daa00SOllivier Robert</head> 99c2daa00SOllivier Robert<body> 10*2b15cb3dSCy Schubert<h3><tt>ntptime</tt> - read and set kernel time variables</h3> 119c2daa00SOllivier Robert<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> 129c2daa00SOllivier Robert<p>The turtle has been swimming in the kernel.</p> 13*2b15cb3dSCy Schubert<p>Last update: 14*2b15cb3dSCy Schubert <!-- #BeginDate format:En2m -->11-Sep-2010 05:55<!-- #EndDate --> 15*2b15cb3dSCy Schubert UTC</p> 169c2daa00SOllivier Robert<br clear="left"> 179c2daa00SOllivier Robert<hr> 189c2daa00SOllivier Robert<h4>Synopsis</h4> 199c2daa00SOllivier Robert<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> 209c2daa00SOllivier Robert<h4>Description</h4> 219c2daa00SOllivier Robert<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> 229c2daa00SOllivier Robert<h4>Options</h4> 239c2daa00SOllivier Robert<dl> 24*2b15cb3dSCy Schubert <dt><tt>-c</tt></dt> 25*2b15cb3dSCy Schubert <dd>Display the execution time of <tt>ntptime</tt> itself.</dd> 26*2b15cb3dSCy Schubert <dt><tt>-e <i>est_error</i></tt></dt> 27*2b15cb3dSCy Schubert <dd>Specify estimated error, in microseconds.</dd> 28*2b15cb3dSCy Schubert <dt><tt>-f <i>frequency</i></tt></dt> 29*2b15cb3dSCy Schubert <dd>Specify frequency offset, in parts per million.</dd> 30*2b15cb3dSCy Schubert <dt><tt>-h</tt></dt> 31*2b15cb3dSCy Schubert <dd>Display help information.</dd> 32*2b15cb3dSCy Schubert <dt><tt>-m <i>max_error</i></tt></dt> 33*2b15cb3dSCy Schubert <dd>Specify max possible errors, in microseconds.</dd> 34*2b15cb3dSCy Schubert <dt><tt>-o <i>offset</i></tt></dt> 35*2b15cb3dSCy Schubert <dd>Specify clock offset, in microseconds.</dd> 36*2b15cb3dSCy Schubert <dt><tt>-r</tt></dt> 37*2b15cb3dSCy Schubert <dd>Display Unix and NTP times in raw format.</dd> 38*2b15cb3dSCy Schubert <dt><tt>-s <i>status</i></tt></dt> 39*2b15cb3dSCy Schubert <dd>Specify clock status. Better know what you are doing.</dd> 40*2b15cb3dSCy Schubert <dt><tt>-t <i>time_constant</i></tt></dt> 41*2b15cb3dSCy Schubert <dd>Specify time constant, an integer in the range 0-10.</dd> 429c2daa00SOllivier Robert</dl> 439c2daa00SOllivier Robert<hr> 449c2daa00SOllivier Robert<script type="text/javascript" language="javascript" src="scripts/footer.txt"></script> 459c2daa00SOllivier Robert</body> 469c2daa00SOllivier Robert</html> 47
