| Re: [chrony-users] Setting up Chrony with PPS |
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On Tue, 12 Apr 2016, Deven Hickingbotham wrote:
On 4/11/2016 10:41 PM, Miroslav Lichvar wrote:
That probably depends on the FW of the GPS. If with one update per
second the NMEA messages were only 0.1 second late, with 10 updates
per second that delay wouldn't have to change, it would still fit
between updates. But if it's 0.5 second late, that can't work with 10
updates per second.
I think you just need to change the offset of the SHM refclock to 0.1
second. The delay can stay as it was.
Setting offset to 0.1 works for 10, 5, 4, 3, and 2 updates per second.
Setting offset to 0.5 works for updates every 1 and 2.5 seconds. It does not
work for updates every 5 seconds.
If a future version of chrony could support a wide range of gps update rates
without having to modify chrony.conf, that would be appreciated.
?? why the demand not to modify chrony.conf? It is there precisely to put in
configuration information.
Your update frequency is something you set once, and a bit of effort to get it
right is a good idea. It is somewhat hard for the program itself to know how
far off the time is since it is the only thing that tells it what the time is.
Thanks for the support, it has been very helpful and timely!
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