Don't report a new value if the new one would be the same as the old

pelab/magent/MinDelaySensor.cc

@@ -8,7 +8,7 @@
 using namespace std;
 
 MinDelaySensor::MinDelaySensor(DelaySensor * newDelay)
-  : minimum(1000000, -0.01), minDelay(1000000)
+  : minimum(1000000, -0.01), minDelay(1000000), lastreported(-1)
 {
   delay = newDelay;
 }
@@ -20,16 +20,18 @@ void MinDelaySensor::localSend(PacketInfo *)
 void MinDelaySensor::localAck(PacketInfo * packet)
 {
   int current = delay->getLastDelay();
-  if (current < minimum && current != 0)
+  int oneway = current / 2;
+  if (current < minimum && current != 0 && oneway != lastreported)
   {
     minDelay = current;
     ostringstream buffer;
-    buffer << "delay=" << minDelay/2;
+    buffer << "delay=" << oneway;
     minimum.reset(current);
     global::output->eventMessage(buffer.str(), packet->elab,
                                  CommandOutput::FORWARD_PATH);
     global::output->eventMessage(buffer.str(), packet->elab,
                                  CommandOutput::BACKWARD_PATH);
+    lastreported = oneway;
   }
   else
   {

pelab/magent/MinDelaySensor.h

@@ -24,6 +24,7 @@ private:
   Decayer minimum;
   DelaySensor * delay;
   int minDelay;
+  int lastreported;
 };
 
 #endif