[ntp:questions] Google and leap seconds

David Woolley david at ex.djwhome.demon.invalid
Wed Sep 21 20:31:42 UTC 2011


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> Marco Marongiu wrote:

> 
> Would the ntpd -x (slew always) command line option
>  meet your needs?
> 
That's just a short hand for setting a 10 minute step threshold with 
tinker.  It makes slews unlikely, but it also turns off the kernel time 
discipline resulting in a 1 second see-saw in the offset and generally 
lower quality time keeping.  The kernel time discipline is only 
supported for step thresholds of less than 500ms.

Setting a step threshold large enough to absorb a leap second will also 
turn off the kernel time discipline.




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