[Linuxptp-users] Linuxptp: clock jumps

[Cognault M. <mar...@th...>]

Hello

We try to implement Linuxptp on the following platform:
Intel Core i7 4700EQ
Ethernet controller: Intel I218-LM
Debian 8  - kernel 3.16.7
Driver: e1000e 3.1.0.2

Despite we use the last e1000e release, the synchronization fails from time to time in a way similar to the issue 
https://www.mail-archive.com/linuxptp-users%40lists.sourceforge.net/msg00089.html

Ptp4l log output:
ptp4l[282013.033]: rms 4967 max 13253 freq    +25 +/- 6813 delay 24447 +/- 2423
ptp4l[282014.034]: rms 5018 max 13444 freq   -433 +/- 6870 delay 24234 +/- 2564
ptp4l[282015.035]: rms 5649 max 14758 freq   -492 +/- 7760 delay 23901 +/- 2745
ptp4l[282016.036]: rms 4768 max 12375 freq    -46 +/- 6558 delay 23501 +/- 3154
ptp4l[282017.036]: rms 4923 max 12944 freq   -236 +/- 6765 delay 24439 +/- 2169
ptp4l[282018.038]: rms 9913 max 26066 freq  -1041 +/- 13614 delay 21056 +/- 6639
ptp4l[282018.163]: clockcheck: clock jumped forward or running faster than expected!
ptp4l[282018.163]: port 1: SLAVE to UNCALIBRATED on SYNCHRONIZATION_FAULT
ptp4l[282018.413]: port 1: UNCALIBRATED to SLAVE on MASTER_CLOCK_SELECTED
ptp4l[282019.039]: rms 35184372090195 max 70368744180407 freq  -2994 +/- 7974 delay 24286 +/- 2607
ptp4l[282020.040]: rms 6215 max 11297 freq  -3239 +/- 8480 delay 23951 +/- 2655
ptp4l[282021.040]: rms 5511 max 11347 freq  +1238 +/- 7033 delay 24534 +/- 2700
ptp4l[282022.041]: rms 4514 max 10977 freq   +634 +/- 6153 delay 25364 +/- 247

This issue happens when both ptp4l and phc2sys are running, and doesn't happen if phc2sys is not started.

As this issue should have been solved with the e1000e rev 3.0.4, does somebody know where is the problem (linuxptp, e1000e , I218, ...) ?

Regards

Marc Cognault