> Miroslav Lichvar <mlich...@redhat.com> wrote: > > The default precision of the SHM refclock in chrony is 1 microsecond, > > it won't report jitter smaller than that. Add "precision 1e-9" to the > > SHM line in your chrony.conf to fix that. > > Ah, that explains a lot. Will that fix the jitter computation?
Yes, the +/- value in the chronyc sources output should be smaller than 1 us now. It's mostly a cosmetic issue, it likely won't have any noticeable effect on the synchronization. The precision is the minimum allowed value of dispersion to avoid zero dispersion with low resolution refclocks, e.g. with microsecond SHM it is possible to get several samples with 0 offset, the dispersion would be zero and it would then break all kinds of things. -- Miroslav Lichvar ------------------------------------------------------------------------------ Dive into the World of Parallel Programming The Go Parallel Website, sponsored by Intel and developed in partnership with Slashdot Media, is your hub for all things parallel software development, from weekly thought leadership blogs to news, videos, case studies, tutorials and more. Take a look and join the conversation now. http://goparallel.sourceforge.net/ _______________________________________________ Linuxptp-devel mailing list Linuxptp-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/linuxptp-devel
