[Linuxptp-users] Output of ptp4l

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

Hi all,
I'm newbie user of linuxptp. I need some help to understand the output produced by ptp4l.

ptp4l[1821211.588]: port 1: INITIALIZING to LISTENING on INITIALIZE
ptp4l[1821211.592]: port 0: INITIALIZING to LISTENING on INITIALIZE
ptp4l[1821212.510]: port 1: new foreign master 008063.fffe.db5e00-15
ptp4l[1821216.510]: selected best master clock 00a069.fffe.01c094
ptp4l[1821216.510]: port 1: LISTENING to UNCALIBRATED on RS_SLAVE
ptp4l[1821216.705]: port 1: minimum delay request interval 2^3
ptp4l[1821218.509]: master offset     171578 s0 adj      +0 path delay      53481
ptp4l[1821219.509]: master offset     172021 s0 adj      +0 path delay      53481
ptp4l[1821220.510]: master offset     174685 s0 adj      +0 path delay      53481
ptp4l[1821221.509]: master offset     177810 s1 adj      +0 path delay      53481
ptp4l[1821222.509]: master offset        753 s2 adj     +76 path delay      53481
ptp4l[1821222.509]: port 1: UNCALIBRATED to SLAVE on MASTER_CLOCK_SELECTED
ptp4l[1821223.509]: master offset      17736 s2 adj   +1792 path delay      53481
ptp4l[1821224.509]: master offset      17754 s2 adj   +1812 path delay      53481
ptp4l[1821225.508]: master offset      38232 s2 adj   +3898 path delay      53481
ptp4l[1821226.508]: master offset      47856 s2 adj   +4908 path delay      53481
ptp4l[1821227.508]: master offset      57136 s2 adj   +5893 path delay      53481
ptp4l[1821228.508]: master offset      67594 s2 adj   +7006 path delay      53481
ptp4l[1821229.508]: master offset      75302 s2 adj   +7853 path delay      53481
ptp4l[1821230.508]: master offset      71573 s2 adj   +7551 path delay      53481
ptp4l[1821231.508]: master offset      77021 s2 adj   +8173 path delay      53481
ptp4l[1821232.508]: master offset      90924 s2 adj   +9654 path delay      53481
ptp4l[1821233.508]: master offset      93511 s2 adj  +10006 path delay      53481
ptp4l[1821234.508]: master offset      92060 s2 adj   +9953 path delay      53481
ptp4l[1821235.508]: master offset      93137 s2 adj  +10154 path delay      53481
ptp4l[1821236.508]: master offset     102429 s2 adj  +11186 path delay      53481
ptp4l[1821237.507]: master offset     109941 s2 adj  +12047 path delay      53481
ptp4l[1821238.507]: master offset     106116 s2 adj  +11771 path delay      53184
ptp4l[1821239.507]: master offset     113817 s2 adj  +12655 path delay      53184

....

It is not clear to me how the master offset is expressed: Is it in ns?
Could you explain the meaning of the different values?

Thanks

William