On Tue, Mar 10, 2015 at 10:29:43AM +0100, Miroslav Lichvar wrote: > To give you an idea what difference you can expect with raw > delay/offset and weights, here are graphs from a simulation with > 10us jitter and default PI constants with SW timestamping. > > https://mlichvar.fedorapeople.org/tmp/ptp/ptp4l_error.png > > The RMS time error improved from 2.71 us to 1.85 us and 1.46 us. The > RMS frequency error improved from 1.08 ppm to 0.73 ppm and 0.53 ppm.
And here is a simulation where every 100th packet is delayed by 1 millisecond to better show the effect of sample weighting. https://mlichvar.fedorapeople.org/tmp/ptp/ptp4l_error2.png -- 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
