This reverts commit 50022e9286.
Testing showed that ntpd as an NTP client performs poorly when it's
getting only 25% of responses. At least for now, disable rate limiting
by default again.
Change the default interval of both NTP and command rate limiting to -10
(1024 packets per second) and the burst to 16. The default NTP leak is 2
(rate limiting is enabled by default) and the default command leak is 0
(rate limiting is disabled by default).
Use the -h option to force chronyc to use internet socket instead of
Unix domain as the access to the socket may be blocked by SELinux and
trying to open it generates SELinux warnings.
With a larger number of configured servers, the handler of the emulated
resolver repeatedly scheduled timeout of zero, which triggered the
infinite loop detection in the scheduler and caused abort. This bug was
introduced in commit 967e358dbc.
Rework the code to use pipes instead of timeouts to avoid this problem.
The maxlockage option specifies in number of pulses how old can be
samples from the refclock specified by the lock option to be paired with
the pulses. Increasing this value is useful when the samples are
produced at a lower rate than the pulses.
The maxjitter directive sets the maximum allowed jitter of the sources
to not be rejected by the source selection algorithm. This prevents
synchronisation with sources that have a small root distance, but their
time is too variable. By default, the maximum jitter is 1 second.
Instead of a worst-case delay use a mean value and relate it to the
source's time. This makes it more stable in the interleaved and
symmetric modes, which should improve the weighting and asymmetry
correction. Modify the test A and B to work with a minimum estimated
delay (delay - dispersion).
Change default minsamples to 6 and polltarget to 8. This should improve
stability with extremely small jitters (e.g. HW timestamping) and not
decrease time accuracy at minimum polling interval too much.
This option sets a timeout (in seconds) after which chronyd will exit.
If the clock is not synchronised, it will exit with a non-zero status.
This is useful with the -q or -Q option to shorten the maximum time
waiting for measurements, or with the -r option to limit the time when
chronyd is running, but still allow it to adjust the frequency of the
system clock.
If the MAC in NTPv4 requests would be truncated, use version 3 by
default to avoid the truncation. This is necessary for compatibility
with older chronyd servers, which do not respond to messages with
truncated MACs.
