[ntp:questions] NTP & PPS, part 2 ;)
nomail at example.com
Thu Dec 11 21:46:13 UTC 2014
A C <agcarver+ntp at acarver.net> wrote:
> On 2014-12-11 12:33, Rob wrote:
>> A C <agcarver+ntp at acarver.net> wrote:
>>> On 2014-12-11 11:03, Paul wrote:
>>>> On Thu, Dec 11, 2014 at 11:14 AM, Sander Smeenk <ssmeenk at freshdot.net>
>>>>> But i'm quite sure driver 22 is compiled in the binary i'm running.
>>>> Almost certainly not. Debian derived distos using upstream ntp don't have
>>>> PPS support. However it's fairly trivial to compile and if you use the
>>>> reference package you'll get the latest release and it will install with
>>>> the distro version. The only glitch is timepps.h since they choose not to
>>>> include it in the reference source release. It's in the pps-tools
>>>> repository at GitHub.
>>> Debian wheezy's packaged ntpd does include PPS support. I am currently
>>> running ntpd from that stable repository and running the ATOM refclock
>>> (22). The pps-tools package is also available in the repository for
>>> direct installation.
>> That must be new. There was no PPS support in the Wheezy binaries a
>> couple of months ago. A bug about this was filed, but nothing happened.
> I've only been running PPS disciplined ntpd on Debian since June so I
> didn't pay attention to the lack of PPS prior to that point however the
> latest binary says it was compiled in August. The only other system I
> used with PPS was NetBSD and there I was compiling the kernel and ntpd.
> Linux netclock2 3.2.0-4-686-pae #1 SMP Debian 3.2.63-2+deb7u1 i686 GNU/Linux
> $ ntpq -c rv
> associd=0 status=0115 leap_none, sync_pps, 1 event, clock_sync,
> version="ntpd 4.2.6p5 at 1.2349-o Sat Aug 9 08:39:56 UTC 2014 (1)",
> processor="i686", system="Linux/3.2.0-4-686-pae", leap=00, stratum=1,
> precision=-20, rootdelay=0.000, rootdisp=0.445, refid=PPS,
> reftime=d8348730.416a1068 Thu, Dec 11 2014 13:12:16.255,
> clock=d834873e.a2ba6271 Thu, Dec 11 2014 13:12:30.635, peer=61736, tc=4,
> mintc=3, offset=0.001, frequency=-124.653, sys_jitter=0.002,
> clk_jitter=0.002, clk_wander=0.001
Interesting. Mine says:
version="ntpd 4.2.6p5 at 1.2349-o Sat May 12 09:07:18 UTC 2012 (1)",
Same version, different compilation date, no PPS. And it does not get
updated by apt-get update/upgrade.
You are sure you did not compile it yourself? Compiling the source
package on a system where pps-tools is installed fixes the problem
automagically. It is only a build problem.
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