On Tue, Mar 29, 2016 at 02:44:26PM +0200, Nico Augustijn wrote: > Last week, we've upgraded the RTL of the board to use a 10 Gb MAC and found > that it introduced a fair amount of jitter on the PPS of the system compared > with 1Gb. > We believe this could be mitigated by introducing a second, "slower", set of > PI parameters that would kick in when your locking distance becomes within a > certain amount of ns (say about 70 ns, but should be configurable).
Automatic switching between different sets of PI parameters could be useful and there have been some proposals to do that, but it's not clear to me how exactly you want to select the best set of parameters. If you know the second set of PI parameters performs better, why not use them right from the start? If this is about faster convergence, maybe it would be better to add the derivative term to the current servo? Also, linuxptp already has an adaptive servo, linreg. Have you tried it? -- Miroslav Lichvar ------------------------------------------------------------------------------ Transform Data into Opportunity. Accelerate data analysis in your applications with Intel Data Analytics Acceleration Library. Click to learn more. http://pubads.g.doubleclick.net/gampad/clk?id=278785471&iu=/4140 _______________________________________________ Linuxptp-devel mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/linuxptp-devel
