From: Miroslav Lichvar Date: Thu, 2 Feb 2023 14:05:05 +0000 (+0100) Subject: doc: improve description of refclock filter option X-Git-Tag: 4.4-pre1~38 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=221e5fb5011594d12fa4b6e5f851dc70d0ae4775;p=thirdparty%2Fchrony.git doc: improve description of refclock filter option --- diff --git a/doc/chrony.conf.adoc b/doc/chrony.conf.adoc index a2148980..f4dff331 100644 --- a/doc/chrony.conf.adoc +++ b/doc/chrony.conf.adoc @@ -642,7 +642,9 @@ noise in the measurements. With each poll about 40 percent of the stored samples are discarded and one final sample is calculated as an average of the remaining samples. If the length is 4 or more, at least 4 samples have to be collected between polls. For lengths below 4, the filter has to be full. The -default is 64. +default is 64. With drivers that perform their own polling (PPS, PHC, SHM), the +maximum value is adjusted to the number of driver polls per source poll, i.e. +2^(_poll_ - _dpoll_). *prefer*::: Prefer this source over sources without the prefer option. *noselect*:::