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ntp: enable sub-second poll sooner with filter option

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When the minimum round-trip time is checked to enable a sub-second
polling interval, consider also the last sample in the filter to avoid
waiting for the first sample to be accumulated in sourcestats.
This commit is contained in:
Miroslav Lichvar
2022-07-18 12:50:05 +02:00
parent 220e6d1907
commit 3556dadea1
1 changed files with 5 additions and 1 deletions
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6
ntp_core.c
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@@ -783,6 +783,8 @@ NCR_ChangeRemoteAddress(NCR_Instance inst, NTP_Remote_Address *remote_addr, int
static void
adjust_poll(NCR_Instance inst, double adj)
{
NTP_Sample last_sample;
inst->poll_score += adj;
if (inst->poll_score >= 1.0) {
@@ -808,7 +810,9 @@ adjust_poll(NCR_Instance inst, double adj)
or it is not in a local network according to the measured delay */
if (inst->local_poll < MIN_NONLAN_POLL &&
(!SRC_IsReachable(inst->source) ||
SST_MinRoundTripDelay(SRC_GetSourcestats(inst->source)) > MAX_LAN_PEER_DELAY))
(SST_MinRoundTripDelay(SRC_GetSourcestats(inst->source)) > MAX_LAN_PEER_DELAY &&
(!inst->filter || !SPF_GetLastSample(inst->filter, &last_sample) ||
last_sample.peer_delay > MAX_LAN_PEER_DELAY))))
inst->local_poll = MIN_NONLAN_POLL;
}