lkml.org 
[lkml]   [1996]   [May]   [16]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: Why touch the CMOS clock?
From
Date

> RTC doesn't drift quite that much when the system is off, but it does
> drift enough that I have to check the clock if I have the system off for

The RTC is driven by a crystal. Crystals are temperature change
sensitive; I think the temperature sensitivity is quadratic. Look in
ftp.udel.edu pub/ntp (ie. along with the ntp sources) for the
time-surveying paper and figures -- an MIT thesis project on clock
quality and synchronization came up with a lot of interesting things
about the real world properties of clocks.


\
 
 \ /
  Last update: 2005-03-22 13:37    [W:0.045 / U:4.464 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site