On Wed, Jun 05, 2019 at 03:46:38PM +0200, Mino Sharkhawy wrote: > > One explanation would be an asymmetry in phc2sys. Synchronizing the > > system clock to the PHC uses a more accurate method for measuring the > > offset than synchronizing the PHC to the system clock. > > > > This asymmetry was fixed only recently after linuxptp-2.0 was > > released. Have you tried phc2sys compiled from the latest sources in > > git? > Thanks for the hint. But after trying with an upgraded phc2sys and ptp4l > from the master branch (they both say "2.0-00051-g450b1ed" when "-v") for > 24h the result is even worse? (figure attached)
Hm. Interesting. If the HW, SW and PPS are identical, I'm not sure what else it could be. What happens when you swap the master/slave roles? Does the offset change? Only the sign, or also the absolute value? -- Miroslav Lichvar _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
