Merge pull request #16668 from rgacogne/ddist-health-check-latency-bucket

dnsdist: Add an histogram of health-check latencies for backends

diff --cc pdns/dnsdistdist/dnsdist-tcp.cc
Simple merge

diff --cc pdns/dnsdistdist/dnsdist.cc
index e7155b94fc0e86b6c9399e615563d9e5fc0679a2,92174423fd037df47f7f781bd9efe0b3bfcf1f8b..a4bebd84e4ab7b345fff1a4d34a3e10a0e4a94c2
--- 1/pdns/dnsdistdist/dnsdist.cc
--- 2/pdns/dnsdistdist/dnsdist.cc
+++ b/pdns/dnsdistdist/dnsdist.cc
@@@ -642,12 -621,13 +624,12 @@@ bool sendUDPResponse(int origFD, const 
    return true;
  }
  
- void handleResponseSent(const InternalQueryState& ids, double udiff, const ComboAddress& client, const ComboAddress& backend, unsigned int size, const dnsheader& cleartextDH, dnsdist::Protocol outgoingProtocol, bool fromBackend)
+ void handleResponseSent(const InternalQueryState& ids, int udiff, const ComboAddress& client, const ComboAddress& backend, unsigned int size, const dnsheader& cleartextDH, dnsdist::Protocol outgoingProtocol, bool fromBackend)
  {
    handleResponseSent(ids.qname, ids.qtype, udiff, client, backend, size, cleartextDH, outgoingProtocol, ids.protocol, fromBackend);
 -  ids.sendDelayedProtobufMessages();
  }
  
- void handleResponseSent(const DNSName& qname, const QType& qtype, double udiff, const ComboAddress& client, const ComboAddress& backend, unsigned int size, const dnsheader& cleartextDH, dnsdist::Protocol outgoingProtocol, dnsdist::Protocol incomingProtocol, bool fromBackend)
+ void handleResponseSent(const DNSName& qname, const QType& qtype, int udiff, const ComboAddress& client, const ComboAddress& backend, unsigned int size, const dnsheader& cleartextDH, dnsdist::Protocol outgoingProtocol, dnsdist::Protocol incomingProtocol, bool fromBackend)
  {
    if (g_rings.shouldRecordResponses()) {
      timespec now{};