On Thu, Jul 21, 2022 at 12:41:54PM +0200, Jakub Raczyński wrote: > > 21.07.2022 10:20 Miroslav Lichvar <mlich...@redhat.com> wrote: > > No, that's not correct. Try running the ntpshmmon tool from gpsd to > > see that phc2sys is writing new samples in both directions. > > You are mistaken, I did try ntpshmmon and it does write to ntpshm only in one > direction as Slave.
Well, that means there is something wrong with your setup. > As such, since data is not written to ntpshm, I assume that phc2sys does > select direction incorrectly after ntpd reset when significant offset was > present. Seems like servo reset issue that does not update direction or sets > it incorrectly. I will probably debug it in following days but I had hoped > you could be of assistance. Your interpretation is wrong. If you looked at the code, you would see that the ntpshm servo is only writing to the segment. It doesn't know if there is anything reading that data, or what happens with it. ntpd cannot communicate with phc2sys over the SHM. -- Miroslav Lichvar _______________________________________________ Linuxptp-users mailing list Linuxptp-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-users
