Add new flag to source struct to indicate when source is selectable
(packets with good headers are received) and use a reachability
register for last 8 samples instead of the reachable flag. Source
drivers now provide only reachability updates.
Split test7 into two and to accumulate the sample require that all tests
pass, except the one which checks packet stratum is not higher than ours.
Also, don't mark the source as unreachable when only test4c fails.
Require that the ratio of the increase in delay from the minimum one in
the stats data register to the standard deviation of the offsets in the
register is less than maxdelaydevratio or the difference between
measured offset and predicted offset is larger than the increase in
delay. In the allowed delay increase is included also skew and maximum
clock frequency error.
maxdelaydevratio is 10.0 by default.
Instead of following skew changes, adjust polling interval so that the
number of measurements used in the regression algorithm remains close to
a target value. It can be configured with a new polltarget option
(6 by default).
I tried running chronyd in valgrind and the result was that there are four
places where memory is not initialized. A patch fixing the errors is in the
attachment.
Further to the discussion with John Hasler, here are new diffs which
handles the incoming stratum 0 claim of a remote server by redefining the
incoming stratum as one bigger than the Max if it is zero, as per the NTP
version 4 documentation.
If the incoming stratum is zero it sets it to NTP_MAX_STRATUM+1 . If our
current stratum is larger than the NTP_MAX_STRATUM, the outgoing stratum is
also set to zero as per the suggestions in the NTP docs.
Introduces the new NTP_INVALID_STRATUM of 0 for doing these tests or
setting the outgoing stratum.
It is unclear whether chrony wants to follow NTP in setting the outgoing
stratum to zero if it is unknown or invalid, rather than a number larger
than the max stratum. Setting it to zero seems silly, since zero is already
used to define the stratum of a hardware clock (GPS, atomic, etc). This
seems ripe for confusion. But the fact that the ntp docs state to do this,
and that ntp servers (eg ntp.ubc.ca) are already doing this (using 0 to
mean invalid) means that chrony has to handle it on the incoming packets
from the servers.
Kevin Lyda writes:
I enclose the following patch which removes all but three of the warnings. i
don't have any non-linux systems handy to test a fix to the round() function.
but having it return a double should be fine.
It doesn't actually fix anything, it just shuts up -Wall, so it's certainly an
optional type of patch.
This is a verbatim copy of the files at that stage of the repository that was
built from the CVS import. It allows future development to see a bit of recent
history, but without carrying around the baggage going back to 1997. If that
is really required, git grafts can be used.
