| Re: [chrony-users] Chrony configuration with GPS+direct PHC |
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- To: chrony-users@xxxxxxxxxxxxxxxxxxxx
- Subject: Re: [chrony-users] Chrony configuration with GPS+direct PHC
- From: Miroslav Lichvar <mlichvar@xxxxxxxxxx>
- Date: Mon, 24 May 2021 12:37:59 +0200
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On Mon, May 24, 2021 at 06:32:46AM -0400, Kevin P. Fleming wrote:
> refclock SHM 0 refid GPS precision 1e-1 offset 0.065
> refclock PHC /dev/ptp3:extpps:nocrossts refid PPS width 0.5 precision 1e-7
>
> Chrony is quite happy with the PPS refclock now, but not so happy with
> the GPS refclock; I'll have to discuss that with the gpsd team.
It looks ok to me. The message-based refclock is normally not expected
to be very stable or accurate, which is why it's recommended to
disable it for timekeeping by the noselect option and only use to
"lock" the PPS refclock.
--
Miroslav Lichvar
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