[Linuxptp-users] phc2sys trouble

[Ledda W. E. <Wil...@it...>]

Hi all,
I have encountered some trouble using the phc2sys and I don't know how to solve.
After some times (about ten minutes), during the execution, the offset reported between the two clock become suddenly very high.

...
phc        27 s4 1374832244.265263254 drift -5661.93
phc        36 s4 1374832245.265387488 drift -5651.13
phc       -56 s4 1374832246.265498437 drift -5667.93
phc        82 s4 1374832247.265616591 drift -5643.33
phc        43 s4 1374832248.265710877 drift -5630.43
phc -35004266893 s4 1374832214.261566870 drift -5630.43
phc -35003773008 s4 1374832215.261718369 drift -5630.43
phc -35003278873 s4 1374832216.261850060 drift -5630.43
phc -35002784574 s4 1374832217.261959739 drift -5630.43
phc -35002290414 s4 1374832218.262081436 drift -5630.43
phc -35001796210 s4 1374832219.262191674 drift -5630.43
phc -35001302057 s4 1374832220.262308201 drift -5630.43
phc -35000807865 s4 1374832221.262399782 drift -5630.43
phc -35000313287 s4 1374832222.262549779 drift -5630.43
phc -34999819463 s4 1374832223.262670778 drift -5630.43
phc -34999325427 s4 1374832224.262761871 drift -5630.43
phc -34998831261 s4 1374832225.262880912 drift -5630.43
phc -34998337019 s4 1374832226.263005684 drift -5630.43
...


Only when a restart the pch2sys the offset returns to a low value. Monitoring the output of ptp4l I don't see any changes in the status. The PHC remains synched with the GMC with an acceptable offset. Any idea?

Reagrds

William