Lines Matching +full:clock +full:- +full:accuracy
10 <!-- #BeginDate format:En2m -->27-Jan-2014 05:31<!-- #EndDate -->
13 <! -- This is deliberately not a mailto -- > <jhawk@MIT.EDU>
23 <A HREF="solaris-dosynctodr.html">Here is the report</A>.
26 variable <I>dosynctodr</I> to zero (meaning "do not synchronize the clock
27 to the hardware time-of-day clock"). This can be done with the
30 tickadj -s
34 echo dosynctodr/W0 | adb -k -w /dev/ksyms /dev/mem
44 clock tick (c.f. <A HREF="#frequency_tolerance">Dealing
49 nanoseconds and microseconds, respectively, added to the system clock
50 each clock interrupt. Enterprising souls may set these based on
72 The NTP Version 3 specification RFC-1305 calls for a maximum
73 oscillator frequency tolerance of +-100 parts-per-million (PPM), which is
79 release, this tolerance has been increased to +-500 PPM. <p>However, in the
84 each interval- timer interrupt, while the variable <tt>tickadj</tt> is used
107 substantially improve the general accuracy of the time service.</p>
110 small adjustments to the clock, usually at one-second intervals. If
122 cause the clock to run with a very large frequency error, as with SunOS
125 synchronize the system clock to the time-of-day clock, something you really
134 bounds, as well as reasonably good accuracy with acceptable polling
136 than 500 PPM. For machines with a value of <tt>tick</tt> in the 10-ms range,
141 source (eyeball-and-wristwatch will do) over a day or more. Multiply the
146 <tt>tickadj</tt> -t 9999 -a 5 -s
149 off the clock/calendar chip fiddle. This line can be added to the <tt
171 4023118</A>. Bryan Cantrill <! -- <bmc@eng.sun.com> --> of Sun
177 <STRONG>I can't vouch for the accuracy the information below this
183 Solaris 2.2 and later contain completely re-written clock code to
185 re-written clock code is that adjtime does not round off its
194 Solaris 2.1 contains fairly traditional clock code, with <I>tick</I>
201 tickadj -s -a 1000
202 <BR>ntpdate -v server1 server2
204 <BR>ntpdate -v server1 server2
206 <BR>tickadj -a 200
210 The first tickadj turns of the time of day clock and sets the tick
220 clock should be within 2 seconds of the correct time.