traffic-control: Remove unused counters

src/traffic-control/model/codel-queue-disc.cc

@@ -132,11 +132,7 @@ CoDelQueueDisc::CoDelQueueDisc ()
     m_dropping (false),
     m_recInvSqrt (~0U >> REC_INV_SQRT_SHIFT),
     m_firstAboveTime (0),
-    m_dropNext (0),
-    m_state1 (0),
-    m_state2 (0),
-    m_state3 (0),
-    m_states (0)
+    m_dropNext (0)
 {
   NS_LOG_FUNCTION (this);
 }
@@ -226,7 +222,6 @@ CoDelQueueDisc::OkToDrop (Ptr<QueueDiscItem> item, uint32_t now)
     {
       NS_LOG_LOGIC ("Sojourn time has been above target for at least q->interval; it's OK to (possibly) drop packet.");
       okToDrop = true;
-      ++m_state1;
     }
   return okToDrop;
 }
@@ -265,7 +260,6 @@ CoDelQueueDisc::DoDequeue (void)
         }
       else if (CoDelTimeAfterEq (now, m_dropNext))
         {
-          m_state2++;
           while (m_dropping && CoDelTimeAfterEq (now, m_dropNext))
             {
               ++m_count;
@@ -338,7 +332,6 @@ CoDelQueueDisc::DoDequeue (void)
               OkToDrop (item, now);
             }
           m_dropping = true;
-          ++m_state3;
           /*
            * if min went above target close to when we last went below it
            * assume that the drop rate that controlled the queue on the
@@ -367,7 +360,6 @@ CoDelQueueDisc::DoDequeue (void)
     {
       NS_LOG_LOGIC ("Marking due to CeThreshold " << m_ceThreshold.GetSeconds ());
     }
-  ++m_states;
   return item;
 }
 

src/traffic-control/model/codel-queue-disc.h

@@ -212,10 +212,6 @@ private:
   uint16_t m_recInvSqrt;                  //!< Reciprocal inverse square root
   uint32_t m_firstAboveTime;              //!< Time to declare sojourn time above target
   TracedValue<uint32_t> m_dropNext;       //!< Time to drop next packet
-  uint32_t m_state1;                      //!< Number of times packet sojourn goes above target for interval
-  uint32_t m_state2;                      //!< Number of times we perform next drop while in dropping state
-  uint32_t m_state3;                      //!< Number of times we enter drop state and drop the fist packet
-  uint32_t m_states;                      //!< Total number of times we are in state 1, state 2, or state 3
 };
 
 } // namespace ns3