On Thu, 26 Feb 2015 15:09:01 +0100, Martin Burnicki wrote: > Hi folks, > > I've been asked off list to make the slides of my presentation at > FOSDEM 2015 in Brussels available and post the download link on this > list. > > So here it is: > <https://fosdem.org/2015/schedule/event/technical_aspects_of_leap_second_propagation_and_evaluation/> > > See the "Attachment" link.
Very interesting; thanks for posting this. I have a few questions and comments: 1. Slide titled "Known Bugs (2)": Has support for negative leap seconds been restored in NTP v4? It wasn't clear. 2. Slide titled ""Possibilities for Future Improvements (2)": In the wish list for a kernel call to ask if the kernel runs UTC or TAI, a couple of issues come to mind. First, many systems set the GPS receiver to emit GPS System Time via NTP (and IRIG), so a GPS System Time option may be needed. Second, we often have the GPS (or PTP 1588) receiver to emit GPS System Time, but never share this with downstream servers, who are configured for UTC (but strangely the leap seconds never come). The difference between UTC and GPS System Time is handled in applications code. The reason for this approach is so that the bulk of the system is free from step discontinuities, and only the interfaces need deal with UTC. Joe Gwinn _______________________________________________ LEAPSECS mailing list [email protected] https://pairlist6.pair.net/mailman/listinfo/leapsecs
