ruby: message buffer: removes some unecessary functions.

src/mem/ruby/buffers/MessageBuffer.cc

@@ -75,7 +75,7 @@ MessageBuffer::getSize()
 }
 
 bool
-MessageBuffer::areNSlotsAvailable(int n)
+MessageBuffer::areNSlotsAvailable(unsigned int n)
 {
 
     // fast path when message buffers have infinite size
@@ -124,7 +124,7 @@ MessageBuffer::getMsgPtrCopy() const
 }
 
 const Message*
-MessageBuffer::peekAtHeadOfQueue() const
+MessageBuffer::peek() const
 {
     DPRINTF(RubyQueue, "Peeking at head of queue.\n");
     assert(isReady());
@@ -160,9 +160,7 @@ MessageBuffer::enqueue(MsgPtr message, Cycles delta)
     }
     m_msgs_this_cycle++;
 
-    if (!m_ordering_set) {
-        panic("Ordering property of %s has not been set", m_name);
-    }
+    assert(m_ordering_set);
 
     // Calculate the arrival time of the message, that is, the first
     // cycle the message can be dequeued.
@@ -211,9 +209,7 @@ MessageBuffer::enqueue(MsgPtr message, Cycles delta)
     assert(m_sender->clockEdge() >= msg_ptr->getLastEnqueueTime() &&
            "ensure we aren't dequeued early");
 
-    msg_ptr->setDelayedTicks(m_sender->clockEdge() -
-                             msg_ptr->getLastEnqueueTime() +
-                             msg_ptr->getDelayedTicks());
+    msg_ptr->updateDelayedTicks(m_sender->clockEdge());
     msg_ptr->setLastEnqueueTime(arrival_time);
 
     // Insert the message into the priority heap
@@ -226,29 +222,9 @@ MessageBuffer::enqueue(MsgPtr message, Cycles delta)
             arrival_time, *(message.get()));
 
     // Schedule the wakeup
-    if (m_consumer != NULL) {
-        m_consumer->scheduleEventAbsolute(arrival_time);
-        m_consumer->storeEventInfo(m_vnet_id);
-    } else {
-        panic("No consumer: %s name: %s\n", *this, m_name);
-    }
-}
-
-Cycles
-MessageBuffer::dequeue_getDelayCycles(MsgPtr& message)
-{
-    dequeue(message);
-    return setAndReturnDelayCycles(message);
-}
-
-void
-MessageBuffer::dequeue(MsgPtr& message)
-{
-    DPRINTF(RubyQueue, "Dequeueing\n");
-    message = m_prio_heap.front().m_msgptr;
-
-    pop();
-    DPRINTF(RubyQueue, "Enqueue message is %s\n", (*(message.get())));
+    assert(m_consumer != NULL);
+    m_consumer->scheduleEventAbsolute(arrival_time);
+    m_consumer->storeEventInfo(m_vnet_id);
 }
 
 Cycles
@@ -258,14 +234,16 @@ MessageBuffer::dequeue_getDelayCycles()
     MsgPtr message = m_prio_heap.front().m_msgptr;
 
     // get the delay cycles
-    Cycles delayCycles = setAndReturnDelayCycles(message);
+    message->updateDelayedTicks(m_receiver->clockEdge());
+    Cycles delayCycles =
+        m_receiver->ticksToCycles(message->getDelayedTicks());
     dequeue();
 
     return delayCycles;
 }
 
 void
-MessageBuffer::pop()
+MessageBuffer::dequeue()
 {
     DPRINTF(RubyQueue, "Popping\n");
     assert(isReady());
@@ -375,7 +353,7 @@ MessageBuffer::stallMessage(const Address& addr)
     assert(addr.getOffset() == 0);
     MsgPtr message = m_prio_heap.front().m_msgptr;
 
-    pop();
+    dequeue();
 
     //
     // Note: no event is scheduled to analyze the map at a later time.
@@ -385,22 +363,6 @@ MessageBuffer::stallMessage(const Address& addr)
     (m_stall_msg_map[addr]).push_back(message);
 }
 
-Cycles
-MessageBuffer::setAndReturnDelayCycles(MsgPtr msg_ptr)
-{
-    // get the delay cycles of the message at the top of the queue
-
-    // this function should only be called on dequeue
-    // ensure the msg hasn't been enqueued
-    assert(msg_ptr->getLastEnqueueTime() <= m_receiver->clockEdge());
-
-    msg_ptr->setDelayedTicks(m_receiver->clockEdge() -
-                             msg_ptr->getLastEnqueueTime() +
-                             msg_ptr->getDelayedTicks());
-
-    return m_receiver->ticksToCycles(msg_ptr->getDelayedTicks());
-}
-
 void
 MessageBuffer::print(ostream& out) const
 {

src/mem/ruby/buffers/MessageBuffer.hh

@@ -74,7 +74,7 @@ class MessageBuffer
         enqueue(node.m_msgptr, Cycles(1));
     }
 
-    bool areNSlotsAvailable(int n);
+    bool areNSlotsAvailable(unsigned int n);
     int getPriority() { return m_priority_rank; }
     void setPriority(int rank) { m_priority_rank = rank; }
     void setConsumer(Consumer* consumer)
@@ -104,8 +104,9 @@ class MessageBuffer
 
     Consumer* getConsumer() { return m_consumer; }
 
-    const Message* peekAtHeadOfQueue() const;
-    const Message* peek() const { return peekAtHeadOfQueue(); }
+    //! Function for extracting the message at the head of the
+    //! message queue.  The function assumes that the queue is nonempty.
+    const Message* peek() const;
     const MsgPtr getMsgPtrCopy() const;
 
     const MsgPtr&
@@ -115,23 +116,15 @@ class MessageBuffer
         return m_prio_heap.front().m_msgptr;
     }
 
-    const MsgPtr&
-    peekMsgPtrEvenIfNotReady() const
-    {
-        return m_prio_heap.front().m_msgptr;
-    }
-
     void enqueue(MsgPtr message) { enqueue(message, Cycles(1)); }
     void enqueue(MsgPtr message, Cycles delta);
 
-    //!  returns delay ticks of the message.
-    Cycles dequeue_getDelayCycles(MsgPtr& message);
-    void dequeue(MsgPtr& message);
-
-    //! returns delay cycles of the message
+    //! Updates the delay cycles of the message at the of the queue,
+    //! removes it from the queue and returns its total delay.
     Cycles dequeue_getDelayCycles();
-    void dequeue() { pop(); }
-    void pop();
+
+    void dequeue();
+
     void recycle();
     bool isEmpty() const { return m_prio_heap.size() == 0; }
 
@@ -141,12 +134,12 @@ class MessageBuffer
         m_strict_fifo = order;
         m_ordering_set = true;
     }
+
     void resize(int size) { m_max_size = size; }
     int getSize();
     void setRandomization(bool random_flag) { m_randomization = random_flag; }
 
     void clear();
-
     void print(std::ostream& out) const;
     void clearStats() { m_not_avail_count = 0; m_msg_counter = 0; }
 
@@ -168,13 +161,6 @@ class MessageBuffer
     //added by SS
     Cycles m_recycle_latency;
 
-    // Private Methods
-    Cycles setAndReturnDelayCycles(MsgPtr message);
-
-    // Private copy constructor and assignment operator
-    MessageBuffer(const MessageBuffer& obj);
-    MessageBuffer& operator=(const MessageBuffer& obj);
-
     // Data Members (m_ prefix)
     //! The two ends of the buffer.
     ClockedObject* m_sender;

src/mem/ruby/network/garnet/fixed-pipeline/NetworkInterface_d.cc

@@ -227,7 +227,7 @@ NetworkInterface_d::wakeup()
         while (inNode_ptr[vnet]->isReady()) { // Is there a message waiting
             msg_ptr = inNode_ptr[vnet]->peekMsgPtr();
             if (flitisizeMessage(msg_ptr, vnet)) {
-                inNode_ptr[vnet]->pop();
+                inNode_ptr[vnet]->dequeue();
             } else {
                 break;
             }

src/mem/ruby/network/garnet/flexible-pipeline/NetworkInterface.cc

@@ -253,7 +253,7 @@ NetworkInterface::wakeup()
         {
             msg_ptr = inNode_ptr[vnet]->peekMsgPtr();
             if (flitisizeMessage(msg_ptr, vnet)) {
-                inNode_ptr[vnet]->pop();
+                inNode_ptr[vnet]->dequeue();
             } else {
                 break;
             }

src/mem/ruby/network/simple/PerfectSwitch.cc

@@ -286,7 +286,7 @@ PerfectSwitch::wakeup()
                     }
 
                     // Dequeue msg
-                    m_in[incoming][vnet]->pop();
+                    m_in[incoming][vnet]->dequeue();
                     m_pending_message_count[vnet]--;
                 }
             }

src/mem/ruby/network/simple/Throttle.cc

@@ -160,7 +160,7 @@ Throttle::wakeup()
 
                 // Move the message
                 m_out[vnet]->enqueue(m_in[vnet]->peekMsgPtr(), m_link_latency);
-                m_in[vnet]->pop();
+                m_in[vnet]->dequeue();
 
                 // Count the message
                 m_msg_counts[net_msg_ptr->getMessageSize()][vnet]++;

src/mem/ruby/slicc_interface/Message.hh

@@ -71,7 +71,13 @@ class Message : public RefCounted
     virtual bool functionalWrite(Packet *pkt) = 0;
     //{ fatal("Write functional access not implemented!"); }
 
-    void setDelayedTicks(const Tick ticks) { m_DelayedTicks = ticks; }
+    //! Update the delay this message has experienced so far.
+    void updateDelayedTicks(Tick curTime)
+    {
+        assert(m_LastEnqueueTime <= curTime);
+        Tick delta = curTime - m_LastEnqueueTime;
+        m_DelayedTicks += delta;
+    }
     const Tick getDelayedTicks() const {return m_DelayedTicks;}
 
     void setLastEnqueueTime(const Tick& time) { m_LastEnqueueTime = time; }

src/mem/ruby/system/DMASequencer.cc

@@ -30,7 +30,6 @@
 #include "debug/RubyStats.hh"
 #include "mem/protocol/SequencerMsg.hh"
 #include "mem/protocol/SequencerRequestType.hh"
-#include "mem/ruby/buffers/MessageBuffer.hh"
 #include "mem/ruby/system/DMASequencer.hh"
 #include "mem/ruby/system/System.hh"