[ntp:questions] Re: NTPd code modification.

Richard B. Gilbert rgilbert88 at comcast.net
Wed Jun 28 14:35:29 UTC 2006


Maarten Wiltink wrote:

> "P B, Suhas Suhas" <suhasp at lucent.com> wrote in message
> news:3BE48DD0EC7D3948BC183931D9150C2104387944 at ii0015exch001u.iprc.lucent.com...
> [...]
> 
>>I have a special requirement that , ntp daemon should not modify the
>>time automatically , instead it should inform a application ( some
>>critical application ) that is running, the  application should take
>>care of modifying the time .
>>
>>The requirement is because my application runs timers, if the time
>>is modified without notice to the application, the timers get expired
>>and lead to a chaos.
> 
> 
> I take it your application is that critical one.
> 
> Good news! NTP doesn't work the way you think. Rather than adjusting
> the 'hands' of the clock directly, it adjusts the speed at which they
> move. That means that the timers never notice.

I think that would depend on the interval being timed and the precision 
of the local clock.  Very short intervals could be significantly 
affected by nptd's operations.




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