Re: [LEAPSECS] W1K GPS rollover for some time servers (PTP motivation)

2015-05-06 Thread Joseph Gwinn
On Tue, 5 May 2015 22:54:03 -0700, Steve Allen wrote: Like the TymServe 2100 units there will probably be other systems that fail because of a lack of leap seconds. That means that 45 years ago the CCIR put us all into a Catch-22 situation, and the ITU-R inherits the undesired responsibility

Re: [LEAPSECS] W1K GPS rollover for some time servers

2015-05-06 Thread Rob Seaman
On May 5, 2015, at 8:37 PM, Warner Losh i...@bsdimp.com wrote: It is time to look at other solutions to the synchronization problem that can be implemented correctly. By all means. That is not what the ITU has been doing. Redefining UTC to cease leap seconds is the opposite of a solution.

Re: [LEAPSECS] W1K GPS rollover for some time servers

2015-05-05 Thread Warner Losh
On May 5, 2015, at 9:19 PM, Rob Seaman sea...@noao.edu wrote: On May 5, 2015, at 6:16 PM, Warner Losh i...@bsdimp.com wrote: This is an excellent example of the unintended consequences of leap seconds, and the ways they insinuate themselves into non-obvious parts of the code. ...and is

Re: [LEAPSECS] W1K GPS rollover for some time servers

2015-05-05 Thread Rob Seaman
On May 5, 2015, at 6:16 PM, Warner Losh i...@bsdimp.com wrote: This is an excellent example of the unintended consequences of leap seconds, and the ways they insinuate themselves into non-obvious parts of the code. ...and is it somehow impossible that there might be unintended consequences

Re: [LEAPSECS] W1K GPS rollover for some time servers

2015-05-05 Thread Warner Losh
On May 5, 2015, at 7:02 PM, Tom Van Baak t...@leapsecond.com wrote: As seen at http://lists.ntp.org/pipermail/hackers/2015-May/006866.html and also as experienced at Keck Observatory last night, some models of GPS time servers just did their firmware's W1K rollover, so those are saying

Re: [LEAPSECS] W1K GPS rollover for some time servers

2015-05-05 Thread Tom Van Baak
As seen at http://lists.ntp.org/pipermail/hackers/2015-May/006866.html and also as experienced at Keck Observatory last night, some models of GPS time servers just did their firmware's W1K rollover, so those are saying the date is 1995-09-17. But the leap second is, inappropriately,

Re: [LEAPSECS] W1K GPS rollover for some time servers

2015-05-05 Thread Steve Allen
Like the TymServe 2100 units there will probably be other systems that fail because of a lack of leap seconds. That means that 45 years ago the CCIR put us all into a Catch-22 situation, and the ITU-R inherits the undesired responsibility of doing or not doing something about it. On Tue

Re: [LEAPSECS] W1K GPS rollover for some time servers

2015-05-05 Thread Martin Burnicki
Hi Tom, Tom Van Baak wrote: As seen at http://lists.ntp.org/pipermail/hackers/2015-May/006866.html and also as experienced at Keck Observatory last night, some models of GPS time servers just did their firmware's W1K rollover, so those are saying the date is 1995-09-17. But the leap second is,

Re: [LEAPSECS] W1K GPS rollover for some time servers

2015-05-04 Thread Alex Currant via LEAPSECS
ensemble of programmers who only heard of GMT. From: Tom Van Baak t...@leapsecond.com To: Leap Second Discussion List leapsecs@leapsecond.com Sent: Monday, May 4, 2015 7:40 PM Subject: Re: [LEAPSECS] W1K GPS rollover for some time servers As seen at http://lists.ntp.org/pipermail

Re: [LEAPSECS] W1K GPS rollover for some time servers

2015-05-04 Thread Warner Losh
On May 3, 2015, at 5:52 PM, Steve Allen s...@ucolick.org wrote: As seen at http://lists.ntp.org/pipermail/hackers/2015-May/006866.html and also as experienced at Keck Observatory last night, some models of GPS time servers just did their firmware's W1K rollover, so those are saying the

Re: [LEAPSECS] W1K GPS rollover for some time servers

2015-05-04 Thread Tom Van Baak
As seen at http://lists.ntp.org/pipermail/hackers/2015-May/006866.html and also as experienced at Keck Observatory last night, some models of GPS time servers just did their firmware's W1K rollover, so those are saying the date is 1995-09-17. But the leap second is, inappropriately,

[LEAPSECS] W1K GPS rollover for some time servers

2015-05-03 Thread Steve Allen
As seen at http://lists.ntp.org/pipermail/hackers/2015-May/006866.html and also as experienced at Keck Observatory last night, some models of GPS time servers just did their firmware's W1K rollover, so those are saying the date is 1995-09-17. But the leap second is, inappropriately, getting the

Re: [LEAPSECS] W1K GPS rollover for some time servers

2015-05-03 Thread Steve Allen
On Mon 2015-05-04T02:01:15 +, Alex Currant via LEAPSECS hath writ: The point is that any complication is a potential source of programming errors, and any potential source will eventually lead to problems in predictable and unpredictable ways. The W1K problem is one example. Leap seconds