But i i look at the ptp log, tbe offset is low, so the ethernet card seems
to.be synced... the phc2sys isnt a "local" problem to.the slaves?
How the remote master can influence the phc2sys slaves behaviour if the ptp
offset is ok?
Thanks for your help.
Inviato dal mio dispositivo Huawei
-------- Messaggio originale --------
Oggetto: Re: Ris: [Linuxptp-users] phc2sys doesn't update system clock anymore
Da: Richard Cochran
A: Omar Pighi
CC: linuxptp-users@lists.sourceforge.net
On Sat, Dec 16, 2017 at 07:34:11PM +0000, Omar Pighi wrote:
> 7) what do you mean with letting the phc2sys resetting the system clock?
Do not use: phc2sys -F 0.0
> 8) what parameter can i tune to try to fix it?
-S step
Specify the step threshold of the servo. It is the maximum off‐
set that the servo corrects by changing the clock frequency
instead of stepping the clock. The clock is stepped on start
regardless of the option if the offset is larger than 20
microseconds (unless the -F option is used). It's specified in
seconds. The value of 0.0 disables stepping after the start. The
default is 0.0.
-F step
Specify the step threshold applied only on the first update. It
is the maximum offset that is corrected by adjusting clock. It's
specified in seconds. The value of 0.0 disables stepping on
start. The default is 0.00002 (20 microseconds).
If you are not using phc2sys -F 0.0, then something else is totally
broken. If that is the case, I guess that your arm device is to
blame.
You should run using your two PCs only, leaving out the arm board. If
that works, then find out why your arm board is serving bogus
frequency.
HTH,
Richard
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