[ntp:questions] NTP & PPS, part 2 ;)

A C agcarver+ntp at acarver.net
Thu Dec 11 21:14:02 UTC 2014


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>
>>> wrote:
>>>
>>>> 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




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