Yeah it was showing Leap=01 before. My guess is that it just did :59 twice rather than :59 then :60. I doubt it leap'd backwards, since there was an added second by doing :59 twice. Had it leap'd backwards, I assume it would have gone :58 -> :00, thus removing a second of time.
On Sun, Jul 1, 2012 at 12:37 PM, Nicolas Braud-Santoni < [email protected]> wrote: > Was it advertising leap=01 before the leap ? > > It might be because it leaped backwards (would be strange, though : no > backward leap was ever introduced in the leapfile, IIRC) > > 2012/7/1 AlbyVA <[email protected]>: > > > > > > It looks like my server picked up the Leap Second, but it just counted > > 19:59:59 twice. > > Check it out: (NOTE: EDT -0400 Timezone). > > > > Sat, Jun 30 2012 19:59:59.387 > > Sat, Jun 30 2012 19:59:59.894 > > Sat, Jun 30 2012 19:59:59.401 > > Sat, Jun 30 2012 19:59:59.907 > > Sat, Jun 30 2012 20:00:00.656 > > Sat, Jun 30 2012 20:00:01.170 > > Sat, Jun 30 2012 20:00:01.677 > > > > -Alby > > > > > > > > > > > > On Sun, Jul 1, 2012 at 12:45 AM, Kim B. Sindalsen <[email protected]> wrote: > >> > >> Hi, > >> > >> On my two linux-boxes I've got this in my logs: > >> > >> Box 1: Jul 01 01:59:59 [kernel] [11613806.049909] Clock: inserting leap > >> second 23:59:60 UTC > >> > >> Box 2: Jul 01 01:59:59 [kernel] [976439.291563] Clock: inserting leap > >> second > >> 23:59:60 UTC > >> > >> (I'm on UTC+2) > >> > >> That's the only thing in my logs I could find indicating that something > >> happened tonight ;) > >> > >> -----Original Message----- > >> From: [email protected] > >> [mailto:[email protected]] On Behalf Of Dave Hart > >> Sent: Saturday, June 30, 2012 01:40 > >> To: Daniel Norton > >> Cc: [email protected] > >> Subject: Re: [Pool] Leap Second UTC > >> > >> On Fri, Jun 29, 2012 at 8:40 PM, Daniel Norton <[email protected] > > > >> wrote: > >> > From http://www.ntp.org/ntpfaq/NTP-s-algo-real.htm#AEN2499 > >> > > >> > 5.3.4. What happens during a Leap Second? > >> > > >> > The theory of leap seconds in explained in Q: 2.4.. In reality there > >> > are two cases to consider: > >> > > >> > If the operating system implements the kernel discipline described in > >> > Section 5.2, ntpd will announce insertion and deletion of leap seconds > >> > to the kernel. The kernel will handle the leap seconds without further > >> > action necessary. > >> > >> Although exactly how it's handled is platform-defined. One can imagine > >> simply stepping the clock, pausing the system for a second, or more > subtle > >> schemes that try to ensure always-increasing clock readings. I'm > curious > >> if > >> any don't simply step the clock. > >> > >> > If the operating system does not implement the kernel discipline, the > >> > clock will show an error of one second relative to NTP's time > >> > immediate after the leap second. The situation will be handled just > >> > like an unexpected change of > >> > time: The operating system will continue with the wrong time for some > >> > time, but eventually ntpd will step the time. Effectively this will > >> > cause the correction for leap seconds to be applied too late. > >> > >> NAK on that FAQ. Well, assuming recent ntpd that is. I'm not sure when > >> it > >> changed, but modern ntpd steps the clock back if not using the kernel > loop > >> discipline. That FAQ hasn't been maintained in many years and is > >> increasingly unhelpful. I'd like to see it updated simply to say it's > out > >> of date and shouldn't be relied upon. The intended replacement is the > >> http://support.ntp.org collection of [t]wikis. > >> > >> Cheers, > >> Dave Hart > >> _______________________________________________ > >> pool mailing list > >> [email protected] > >> http://lists.ntp.org/listinfo/pool > >> > >> _______________________________________________ > >> pool mailing list > >> [email protected] > >> http://lists.ntp.org/listinfo/pool > > > > > > > > _______________________________________________ > > pool mailing list > > [email protected] > > http://lists.ntp.org/listinfo/pool >
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