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Keep a per-DNS-server moving average of query latency.

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This commit is contained in:
Simon Kelley
2022-09-15 23:22:02 +01:00
parent 84bd46ddd7
commit a2ee2426bf
4 changed files with 22 additions and 8 deletions
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9
src/forward.c
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@@ -553,8 +553,7 @@ static int forward_query(int udpfd, union mysockaddr *udpaddr,
if (forwarded || is_dnssec)
{
if (daemon->fast_retry_time != 0)
forward->forward_timestamp = dnsmasq_milliseconds();
forward->forward_timestamp = dnsmasq_milliseconds();
return 1;
}
@@ -1237,6 +1236,12 @@ void reply_query(int fd, time_t now)
answers, to conserve file descriptors, and to save work reading and
discarding answers for other upstreams. */
free_rfds(&forward->rfds);
/* calculate modified moving average of server latency */
server->mma_latency += dnsmasq_milliseconds() - forward->forward_timestamp - server->query_latency;
/* denominator controls how many queries we average over. */
server->query_latency = server->mma_latency/128;
#ifdef HAVE_DNSSEC
if ((forward->sentto->flags & SERV_DO_DNSSEC) &&