tickadj always tells me I am silly when I give it the -A described in the docs for optimized tick. I looked at tickadj.c quickly and did not see any facilities for -A
2011/9/25 Dave Hart <[email protected]>: > 2011/9/25 Dave Hart <[email protected]>: >> 2011/9/25 Miguel Gonçalves <[email protected]>: >> >>> tick# tail -10 /var/log/ntp/loopstats >>> 55829 66814.311 0.000010871 185.398 0.000003540 0.002317 4 >>> 55829 66831.312 0.000010025 185.398 0.000000984 0.002167 4 >>> 55829 66847.312 0.000011242 185.398 0.000001303 0.002027 4 >>> 55829 66862.313 0.000011571 185.398 0.000000625 0.001896 4 >>> 55829 66877.313 0.000010833 185.398 0.000000990 0.001774 4 >>> 55829 66893.323 0.000011386 185.398 0.000000724 0.001659 4 >>> 55829 66909.314 0.000010876 185.398 0.000000574 0.001552 4 >>> 55829 66927.314 0.000011263 185.398 0.000000620 0.001452 4 >>> 55829 66942.315 0.000011355 185.398 0.000000402 0.001358 4 >>> 55829 66957.315 0.000010197 185.398 0.000001026 0.001270 4 >>> >> More notable to me: The frequency compensation is varying. What >> version(s) of ntpd are the two machines running? On the first one, >> given the loopstats covers less than 300 seconds and the frequency >> appears locked, I'm guessing you sampled during initial offset >> convergence. That's new for 4.2.7 and runs for the first 300 seconds >> (by default) after the frequency compensation is loaded from driftfile >> or measured. During that period, the frequency compensation is locked >> while ntpd attempts to slew away the initial offset until less than >> 500 usec remains, or the 300s limit elapses. > > Nice theory, Dave, but you overlooked that all those offsets are > within 500 usec of zero (in fact within +10 to +12 usec), which would > trigger the end of initial offset convergence and unclamping the > frequency compensation. > > I'd suggest starting with the tickadj correction, and testing again to > see if the offsets are staying on one side of zero. I'm still curious > about the ntpd versions involved. > > Cheers, > Dave Hart > _______________________________________________ > questions mailing list > [email protected] > http://lists.ntp.org/listinfo/questions _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
