| Re: [chrony-users] Syncromisation confusion |
[ Thread Index |
Date Index
| More chrony.tuxfamily.org/chrony-users Archives
]
- To: chrony-users@xxxxxxxxxxxxxxxxxxxx
- Subject: Re: [chrony-users] Syncromisation confusion
- From: Mattias Winther <mattias.winther@xxxxxxxxx>
- Date: Tue, 23 Mar 2021 15:57:56 +0100
- Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=content-transfer-encoding:from:mime-version:subject:date:message-id :references:in-reply-to:to; bh=qG7dArXabx++swpGNkA7TbpJP86mvIituV472sYdWYo=; b=AVRB1qqA0LTfrkTHTWLKVKtXu0yq1jPk2Ff38WoRBxuOe1wjSXzreU58WGiHhU5rxH yh/Dl+zyKhNgtDgyHmkynKe13zZsOZWPm95oVH5lLESyKrsVY/WshEeuuQyLAfMemwd0 3YPU/lk3AV9ZtFJ+gfVsSEpUlZ5V6DyynXP6DiPGOiXU4RmPRFkJufZMJ9qbdgEWMwF2 CbZtKQ3nnSE34KrzOu6Xzba+zYKWv81G4ws4bXdGZeH/XXbxox5+8Bwoujstg79fBEvL aS12QLcBmvbKy6NAKqBWVlMmpaxd+vAQbpUFWay7096kNBgjdSHAVjRElYRr/h5q6K0y f8Ww==
> 23 mars 2021 kl. 15:41 skrev Miroslav Lichvar <mlichvar@xxxxxxxxxx>:
>
> On Tue, Mar 23, 2021 at 03:17:01PM +0100, Mattias Winther wrote:
>> I tried adding a refclock PCH in pps mode to my chrony machine, which gets
>> its time from an ntpd server running on my firewall, which in turn gets
>> it's time from three different ntp.pool.org-servers. At the moment, the
>> chrony machine is not talking to any other sources.
>>
>> Without the refclock, the offset when graphed was fairly shaky, but the
>> clock settled in to what seemed to be a consistent sync pattern, albeit
>> with a bit less precision than I would like to have.
>>
>> After the refclock was added, chrony says that it's lacking a majority and
>> can't sync for most of the time, and then about every 12 hours it starts to
>> sync, spends about 90 minutes speeding up the clock, until all of a sudden
>> it stops, and goes right back to not syncing.
>
> It sounds like that PHC is not synchronized to anything. Is it
> supposed to be synchronized by ptp4l in a PTP domain?
Yeah, that is right, it doesn’t sync. I got the impression that the refclock in pps mode was keeping the tempo, so to speak, and then would use the ntp server data to get the rest of the timestamp from, but from your question I get the feeling this is not what PHC pps mode does?
> --
> Miroslav Lichvar
>
--
To unsubscribe email chrony-users-request@xxxxxxxxxxxxxxxxxxxx
with "unsubscribe" in the subject.
For help email chrony-users-request@xxxxxxxxxxxxxxxxxxxx
with "help" in the subject.
Trouble? Email listmaster@xxxxxxxxxxxxxxxxxxxx.