[ntp:questions] Leap second functional question

Unruh unruh-spam at physics.ubc.ca
Mon Feb 18 17:04:45 UTC 2008


"David J Taylor" <david-taylor at blueyonder.neither-this-bit.nor-this-bit.co.uk> writes:

>Unruh wrote:
>[]
>> AFAIK ntp deletes a leap second by jumping, and inserts a second by
>> stopping the clock for a second. -- well I am not sure that ntp
>> actually does that. It may just hand the leap second to the kernel
>> and hope the kernel does the right thing. If the kernel does not,
>> then ntp spends the next hour readjusting the clock.

>No.  At least on Windows.  IIRC, it doubles the clock speed for one second 
>to move forward, and halves the clock speed for two seconds to move 
>backwards.  Something like that.  No step is used.  My recollection is at 
>best vague about this, but searching the newsgroup archives may help you.

Is this a windows OS dependent procedure? This of course means that the
time is wrong for at least two seconds, plus errors due to overshoots, etc.


>Cheers,
>David 





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