On Mon, Sep 30, 2019 at 07:17:23PM -0700, Richard Cochran wrote: > On Sat, Sep 28, 2019 at 03:34:14PM +0300, Vladimir Oltean wrote: > > > > From an application socket's perspective, it may happen from time to > > time that follow-up messages are delayed and received not 1 sync message > > too late, but 2 sync messages too late (or more). > > Then it is "game over". > > The delay between the Tx time stamp on the GM and the Rx time stamp > must not exceed a small fraction of the sync. period, otherwise the > servo on the slave becomes unstable. See Eidson 5.2.2.
I think that depends on the servo and its configuration. I'm sure it's possible to configure the PI servo to be stable with a delay of up to an expected number of sync intervals. However, I agree it would be better to fix it in the drivers if possible. -- Miroslav Lichvar _______________________________________________ Linuxptp-devel mailing list Linuxptp-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-devel
