Ah found out that: ingressLatency 769 egressLatency 169
Makes the offset about 17ns from the Master. Where did you get the values from? Somewhere in a data sheet or just guessing? I'm also interessted what refrence plane means in this context? Von: Miroslav Lichvar <mlich...@redhat.com> An: Armin HAMAR <armin.ha...@sprecher-automation.com> Kopie: Linuxptp-users@lists.sourceforge.net Datum: 02.07.2019 12:08 Betreff: Re: Antwort: Re: Re: [Linuxptp-users] PPS to Linux PTP offset/delay? On Tue, Jul 02, 2019 at 11:57:51AM +0200, Armin HAMAR wrote: > Ah very simple the setup is: > > GM <-> SC > > Where the GM is the i210 and the SC is the IMX6.FEC > What i measured was the PPS from SC to GM. > Both have a PPS out where i mesured the distance between the edges. > And the ouput of the SC from PTP4L. > > So the SC syncs to the GM there is nothing addtionally in the network. > Just Ethernet Cable from GM to SC. Ok. Try the two following settings on the SC ingressLatency 169 egressLatency 769 ingressLatency 769 egressLatency 169 and see which brings the offset between the two PPS signals closer to zero. -- Miroslav Lichvar
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