[ntp:questions] NTP adjustment mechanism

Drk Ryan ryandrk at hotmail.com
Sun Aug 31 13:30:06 UTC 2003


If clock adjustment is limited by tickadj/ticksize eg 4/10000 = +-400
ppm , will this essentially mean that for a +100 ppm clock drift, NTP
will run at -400 ppm for the first 0.25 of each second making
adjustments each tick => accumulate an error (relative to actual
clock) of -100 usec and then over that second the actual clock will
gain +100 => balance out ..=> this means that worst case scenario NTP
error will be at 0.25 sec in each sec interval and will be -100 (due
to adj mechanism) +25 (accumulated error at thsi stage due to inherent
error) = -75 msec...is this correct?



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