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Article #1029

XNTP3/MIPS RISCos 5.01 solved (ish)

#1029
From: thorinn
Date: Mon, 25 Jan 1993 11:39
20 lines
1412 bytes
Alan,

from your log it looks like the system time jumped one second backward
in the minute after 05:56:26. Perhaps the SETTIMEOFDAY_DAMAGED patch
does not always guess correctly to which side RISC/os 5 is going to
jump?

The compliance is not really the compliance any more --- it is log2 of
the loop time constant in seconds. The actual value, as a time
interval, may have some significance in phase locked loop theory, but
in the NTP loop filter it is just a number that is used to scale
certain other numbers --- the larger the time constant, the
``stiffer'' the loop, and the longer the poll interval.

The compliance used to be another quantity with a dimension of time, a
long-term decaying average of the loop offset, scaled to ``the same''
units as the loop time constant which it was used to derive. (Smaller
compliance => larger loop time constant.)

Lars Mathiesen (U of Copenhagen CS Dep) <thorinn@diku.dk> (Humour NOT marked)
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From: thorinn@DIKU.DK
Newsgroups: comp.protocols.time.ntp
Subject: XNTP3/MIPS RISCos 5.01 solved (ish)
Message-ID: <9301251139.AA08448@tyr.diku.dk>
Date: 25 Jan 93 11:39:40 GMT
References: <9301251022.aa12468@salmon.maths.tcd.ie>
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