Initialise modified-moving-average latency calc better.

Use the first value, rather than initialising at zero,
which takes many queries to converge.

1 files changed, 4 insertions, 1 deletions

diff --git a/src/forward.c b/src/forward.c
index 52d5b8e..14d9421 100644
--- a/src/forward.c
+++ b/src/forward.c
@@ -1241,7 +1241,10 @@ void reply_query(int fd, time_t now)
   free_rfds(&forward->rfds);
 
   /* calculate modified moving average of server latency */
-  server->mma_latency += dnsmasq_milliseconds() - forward->forward_timestamp - server->query_latency;
+  if (server->query_latency == 0)
+    server->mma_latency = (dnsmasq_milliseconds() - forward->forward_timestamp) * 128; /* init */
+  else
+    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;