I used while true ; do echo "`date +%s%N` `date -u`" ; sleep .5 ; done
Output around midnight looked like: 1435708798151332202 Tue Jun 30 23:59:58 UTC 2015 1435708798660770847 Tue Jun 30 23:59:58 UTC 2015 1435708799170680057 Tue Jun 30 23:59:59 UTC 2015 1435708799680093377 Tue Jun 30 23:59:59 UTC 2015 1435708800189430358 Wed Jul 1 00:00:00 UTC 2015 1435708800698723411 Wed Jul 1 00:00:00 UTC 2015 1435708801208174011 Wed Jul 1 00:00:01 UTC 2015 1435708801717843414 Wed Jul 1 00:00:01 UTC 2015 1435708802227355779 Wed Jul 1 00:00:02 UTC 2015 1435708802737252335 Wed Jul 1 00:00:02 UTC 2015 As much as I wish it were, I don't think it's a measurement problem -- even half-second resolution should have caught it. Thanks for the tip, though, Brian! Jim Witschey Software Engineer in Test | 434-270-8586 | jim.witsc...@datastax.com On Thu, Apr 2, 2015 at 4:57 PM, Brian Inglis <brian.ing...@systematicsw.ab.ca> wrote: > To get higher resolution try something like: > while sleep 0.1 ; do date -u -Ins ; done > > -- > Take care. Thanks, Brian Inglis > > > On 2015-04-02 08:08, Jim Witschey wrote: >> >> UTC -- I'm using `date -u`. > > >> On Thu, Apr 2, 2015 at 2:44 AM, Marco Marongiu <brontoli...@gmail.com> >> wrote: >>> >>> 23:59:59 of which timezone? >>> >>> Il 02/apr/2015 03:14 "Jim Witschey" <jim.witsc...@datastax.com> ha >>> scritto: > > >>>> I'm trying to simulate a leap second on a cluster of Ubuntu AWS >>>> instances via NTP, and I could use some help. I've set up a basic NTP >>>> server with a leapfile as described here: >>>> >>>> https://support.ntp.org/bin/view/Dev/LeapSecondTest >>>> >>>> The server's warning for the upcoming leap second seems to propogate >>>> to the clients, as I see `leap_armed` in the output for `ntpq -c rl` >>>> before midnight, and `leap_event` afterwards. However, when I loop >>>> `date -u` over the leap second, I don't see a leap second getting >>>> inserted -- I expect 23:59:59 to last for 2 seconds, but it doesn't. >>>> The time goes straight from 23:59:59 to 00:00:00 the next day. >>>> >>>> In addition, I don't see any information about inserted leap seconds >>>> in the logs when I search with `dmesg | grep leap` or `sudo grep leap >>>> /var/log/syslog`. >>>> >>>> Am I missing something? I can provide more information on request. > > > _______________________________________________ > questions mailing list > questions@lists.ntp.org > http://lists.ntp.org/listinfo/questions _______________________________________________ questions mailing list questions@lists.ntp.org http://lists.ntp.org/listinfo/questions