🚀 go-pugleaf

% The offsets for the 25mhz machines generally ran from .300 to .100 so
% they generally did not stay in sync.  After the network had been
% up about a month, I looked at a couple of the 25mhz machines and found
% that the were in sync.  What was different about them is that they had
% accumulated a frequency (or drift) value of about 1.97 to 2 whereas the 
% drift of the other machines was generally less than 0.2.  I am not
% sure how long it took for these systems to come to the correct frequency
% (could be a week to a month).  Anyway, now all systems are
% synchronized.


One way to speed up the synchronization process (so it only takes a
couple of days, not a couple of months) is to up the value of the
window size for synchronization (CLOCK_MAX_F) in ntp.h .

One value that will work (and the one I use) is

    #define CLOCK_MAX_F     0x5999999a      /* 350 ms, in time stamp format */

The comments indicate that the maximum that will work without major
code changes is

    #define CLOCK_MAX_F     0x7ffffffe      /* 499 ms, in time stamp format */

But I stick with the slightly smaller value because I'm superstitious
about pushing boundary conditions.

Rick