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Base poll adjustment on number of sourcestats samples

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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).
This commit is contained in:
Miroslav Lichvar
2010-10-13 16:49:28 +02:00
parent d9596334c3
commit 7a6ee1d729
12 changed files with 88 additions and 50 deletions
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10
cmdparse.c
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@@ -60,6 +60,7 @@ CPS_ParseNTPSourceAdd(const char *line, CPS_NTP_Source *src)
src->params.auto_offline = 0;
src->params.iburst = 0;
src->params.min_stratum = SRC_DEFAULT_MINSTRATUM;
src->params.poll_target = SRC_DEFAULT_POLLTARGET;
src->params.sel_option = SRC_SelectNormal;
result = CPS_Success;
@@ -165,6 +166,15 @@ CPS_ParseNTPSourceAdd(const char *line, CPS_NTP_Source *src)
line += n;
}
} else if (!strncasecmp(cmd, "polltarget", 10)) {
if (sscanf(line, "%d%n", &src->params.poll_target, &n) != 1) {
result = CPS_BadPolltarget;
ok = 0;
done = 1;
} else {
line += n;
}
} else if (!strncasecmp(cmd, "noselect", 8)) {
src->params.sel_option = SRC_SelectNoselect;