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Reselect source also according to distance

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Reselect when a source with the same stratum is available and has
significantly better distance than the current source.
This commit is contained in:
Miroslav Lichvar 2009-10-27 14:28:19 +01:00
parent 8cd9e68246
commit 352f03d487
1 changed files with 17 additions and 14 deletions
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31
sources.c
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@ -656,29 +656,32 @@ SRC_SelectSource(unsigned long match_addr)
if (stratum < min_stratum) min_stratum = stratum;
}
/* Find the best source with minimum stratum */
min_distance_index = INVALID_SOURCE;
for (i=0; i<n_sel_sources; i++) {
index = sel_sources[i];
if (sources[index]->sel_info.stratum == min_stratum) {
if ((min_distance_index == INVALID_SOURCE) ||
(sources[index]->sel_info.root_distance < min_distance)) {
min_distance = sources[index]->sel_info.root_distance;
min_distance_index = index;
}
}
}
#if 0
LOG(LOGS_INFO, LOGF_Sources, "min_stratum=%d", min_stratum);
#endif
/* Does the current source have this stratum and is it still a
survivor? */
/* Does the current source have this stratum, doesn't have distance
much worse than the best source and is it still a survivor? */
if ((selected_source_index == INVALID_SOURCE) ||
(sources[selected_source_index]->status != SRC_SELECTABLE) ||
(sources[selected_source_index]->sel_info.stratum > min_stratum)) {
(sources[selected_source_index]->sel_info.stratum > min_stratum) ||
(sources[selected_source_index]->sel_info.root_distance > 10 * min_distance)) {
/* We have to elect a new synchronisation source */
min_distance_index = INVALID_SOURCE;
for (i=0; i<n_sel_sources; i++) {
index = sel_sources[i];
if (sources[index]->sel_info.stratum == min_stratum) {
if ((min_distance_index == INVALID_SOURCE) ||
(sources[index]->sel_info.root_distance < min_distance)) {
min_distance = sources[index]->sel_info.root_distance;
min_distance_index = index;
}
}
}
selected_source_index = min_distance_index;
LOG(LOGS_INFO, LOGF_Sources, "Selected source %s",