[ntp:questions] Re: ntp servers reporting leap second erroneously?

Danny Mayer mayer at ntp.isc.org
Tue Oct 25 12:15:27 UTC 2005


Terje Mathisen wrote:
> Martin Burnicki wrote:
> 
> 
>>Under Linux, the leap second announcement is passed to the kernel which
>>handles it properly.
>>
>>Under Windows, the time is stepped back by one second a few minutes after
>>the time of leap second insertion. 
> 
> 
> If nobody else volunteers I'll take a look at the Win source code and
> see if I can figure out a reasonably good way to insert/delete a second
> by an extra clock slew that avoids resetting the clock drift value.
> 

I'd be happy if you could. I can get it into the development stream if
you do. The main issue will be to be certain that we don't break
anything else.

> 
>>Of course the latter is not optimal and I'd appreciate if ntpd could do the 
>>slewing of the system clock on systems where the kernel clock is not aware
>>of leap seconds. 
>>
>>As I've reported earlier on this news group even the Windows w32time service
>>is capable to slew the Windows system clock at UTC midnight to compensate
>>the leap second offset in just a few seconds.
> 
> 
> Which is why I'm willing to dig in. :-)
> 

Thanks.

Danny
> "Anything Microsoft can do, we can do better."
> 
> Terje




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