[ntp:questions] FLL instability

Mischanko, Edward T Edward.Mischanko at arcelormittal.com
Sun Jan 6 06:29:55 UTC 2013


I have "tinker allan 7" in my ntp.conf, as recommended, but I notice that the frequency is adjusting wildly starting with polling at 128 seconds.  Is something wrong with the way FLL is implemented?

Loopstats:

56298 20566.419 0.000221911 0.910 0.000078478 0.000000 5
56298 20577.418 0.001418160 0.914 0.000429261 0.001315 5
56298 20582.421 0.001436378 0.915 0.000401589 0.001371 5
56298 20629.430 0.001147245 0.928 0.000389313 0.004723 5
56298 20631.433 0.001005958 0.929 0.000367578 0.004421 5
56298 20664.437 0.001080037 0.937 0.000344834 0.005111 5
56298 20707.446 0.000923276 0.947 0.000327290 0.005836 6
56298 20711.446 0.000985022 0.947 0.000306929 0.005460 6
56298 20840.473 0.001008919 0.955 0.000287230 0.005787 6
56298 20888.479 0.000853973 0.957 0.000274207 0.005482 6
56298 20890.481 0.000038269 0.957 0.000385956 0.005128 6
56298 20904.483 0.000319939 0.957 0.000374512 0.004797 6
56298 21039.510 0.000282331 0.960 0.000350576 0.004552 7
56298 21105.522 0.000744431 1.880 0.000366378 0.325567 7
56298 21246.549 0.000699262 1.889 0.000343087 0.304557 7
56298 21378.574 0.000367943 1.345 0.000341638 0.343755 7
56298 21427.585 0.000758371 2.125 0.000348111 0.423635 7
56298 21544.607 -0.000400374 -0.056 0.000523326 0.867155 8
56298 21633.625 0.000754105 1.063 0.000637369 0.902529 8
56298 21646.625 0.000355888 0.676 0.000612602 0.855228 8
56298 22037.701 0.000541072 0.816 0.000576765 0.801509 8
56298 22306.752 0.001064590 1.335 0.000570381 0.771872 9
56298 22326.755 0.000983331 1.297 0.000534315 0.722147 9
56298 22452.780 0.000618194 1.126 0.000516209 0.678204 9
56298 22724.831 0.001502012 1.567 0.000575156 0.653330 9


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