From: bert hubert <bert.hubert@powerdns.com>
Date: Sun, 7 Oct 2018 14:45:56 +0000 (+0200)
Subject: time sometimes goes backwards (...), do not penalize our QPS trackers
X-Git-Tag: rec-4.2.0-alpha1~42^2~16
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=1a1787b622a6e8c1eefcb2d5794191b369b5fb07;p=thirdparty%2Fpdns.git

time sometimes goes backwards (...), do not penalize our QPS trackers
when this happens
---

diff --git a/pdns/dnsdist.hh b/pdns/dnsdist.hh
index 8f2e7a5379..2fe1f8db7f 100644
--- a/pdns/dnsdist.hh
+++ b/pdns/dnsdist.hh
@@ -423,7 +423,8 @@ public:
   {
     auto delta = d_prev.udiffAndSet();
 
-    d_tokens += 1.0 * rate * (delta/1000000.0);
+    if(delta > 0.0) // time, frequently, does go backwards..
+      d_tokens += 1.0 * rate * (delta/1000000.0);
 
     if(d_tokens > burst) {
       d_tokens = burst;