> I think that suggests there is a difference in the HW. If the two > boards performed exactly the same, there should be no difference in > the measured offset. > > I'm not sure what that could be. Maybe the CPU is throttling due to > high temperature? On x86_64 frequency scaling (power saving, turbo) is > a major problem for phc2sys, causing unstable measurements and weird > offsets. That would seriously surprise me, considering it's just two (as far as I can tell) identical Beaglebone Blacks, in the same room, sitting barely 20 cm apart.
I'll keep looking though, thanks for your help! I'll try and see if I can cut out the system clocks and phc2sys entirely somehow. _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
