[ntp:questions] Trouble Simulating Leap Seconds

Jim Witschey jim.witschey at datastax.com
Mon Apr 6 17:56:48 UTC 2015


Do I understand correctly that add_leap_second is an NTP-internal
flag, while INS is a kernel flag? If so: when does the INS flag get
set in the kernel? Should I expect ntpd to do so?

Thanks.

On Fri, Apr 3, 2015 at 11:50 AM, Jim Witschey <jim.witschey at datastax.com> wrote:
>> Does status printed by ntptime include INS before midnight? Any chance
>> ntpd is started with the -x option or there is "tinker step" command
>> in ntp.conf?
>
> No `tinker` commands in `ntp.conf`. `ps axf` indicates that ntpd
> wasn't started with any options other than -p, -u, and -g.
>
> However, `ntptime` doesn't show anything about INS. Here's the output
> from the server:
>
>     ntp_gettime() returns code 0 (OK)
>     time d93dab7a.1db877a0  Tue, Jun 30 2015 23:57:46.116, (.116096333),
>     maximum error 8176001 us, estimated error 0 us, TAI offset 36
>     ntp_adjtime() returns code 0 (OK)
>     modes 0x0 (),
>     offset 0.000 us, frequency 0.000 ppm, interval 1 s,
>     maximum error 8176001 us, estimated error 0 us,
>     status 0x2001 (PLL,NANO),
>     time constant 6, precision 0.001 us, tolerance 500 ppm,
>
> And from one of the clients:
>
>     ntp_gettime() returns code 0 (OK)
>     time d93dab7a.227ef9d0  Tue, Jun 30 2015 23:57:46.134, (.134750490),
>     maximum error 1083949 us, estimated error 3910 us, TAI offset 0
>     ntp_adjtime() returns code 0 (OK)
>     modes 0x0 (),
>     offset -4478.656 us, frequency -2.141 ppm, interval 1 s,
>     maximum error 1083949 us, estimated error 3910 us,
>     status 0x2001 (PLL,NANO),
>     time constant 6, precision 0.001 us, tolerance 500 ppm,


More information about the questions mailing list