ruby: keep histogram of outstanding requests in seq

The histogram for tracking outstanding counts per cycle is maintained
in the profiler. For a parallel implementation of the memory system, we
need that this histogram is maintained locally. Hence it will now be
kept in the sequencer itself. The resulting histograms will be merged
when the stats are printed.

2 files changed, 17 insertions, 11 deletions

diff --git a/src/mem/ruby/system/Sequencer.cc b/src/mem/ruby/system/Sequencer.cc
index 54fb83dd0..5eacc976a 100644
--- a/src/mem/ruby/system/Sequencer.cc
+++ b/src/mem/ruby/system/Sequencer.cc
@@ -133,6 +133,11 @@ Sequencer::wakeup()
     }
 }
 
+void Sequencer::clearStats()
+{
+    m_outstandReqHist.clear();
+}
+
 void
 Sequencer::printStats(ostream & out) const
 {
@@ -268,7 +273,7 @@ Sequencer::insertRequest(PacketPtr pkt, RubyRequestType request_type)
         }
     }
 
-    g_system_ptr->getProfiler()->sequencerRequests(m_outstanding_count);
+    m_outstandReqHist.add(m_outstanding_count);
     assert(m_outstanding_count ==
         (m_writeRequestTable.size() + m_readRequestTable.size()));
 
diff --git a/src/mem/ruby/system/Sequencer.hh b/src/mem/ruby/system/Sequencer.hh
index 782b776f9..058edb9ce 100644
--- a/src/mem/ruby/system/Sequencer.hh
+++ b/src/mem/ruby/system/Sequencer.hh
@@ -68,6 +68,8 @@ class Sequencer : public RubyPort
 
     void printProgress(std::ostream& out) const;
 
+    void clearStats();
+
     void writeCallback(const Address& address, DataBlock& data);
 
     void writeCallback(const Address& address,
@@ -97,17 +99,12 @@ class Sequencer : public RubyPort
     RequestStatus makeRequest(PacketPtr pkt);
     bool empty() const;
     int outstandingCount() const { return m_outstanding_count; }
-    bool
-    isDeadlockEventScheduled() const
-    {
-        return deadlockCheckEvent.scheduled();
-    }
 
-    void
-    descheduleDeadlockEvent()
-    {
-        deschedule(deadlockCheckEvent);
-    }
+    bool isDeadlockEventScheduled() const
+    { return deadlockCheckEvent.scheduled(); }
+
+    void descheduleDeadlockEvent()
+    { deschedule(deadlockCheckEvent); }
 
     void print(std::ostream& out) const;
     void printStats(std::ostream& out) const;
@@ -119,6 +116,7 @@ class Sequencer : public RubyPort
     void invalidateSC(const Address& address);
 
     void recordRequestType(SequencerRequestType requestType);
+    Histogram& getOutstandReqHist() { return m_outstandReqHist; }
 
   private:
     void issueRequest(PacketPtr pkt, RubyRequestType type);
@@ -160,6 +158,9 @@ class Sequencer : public RubyPort
 
     bool m_usingNetworkTester;
 
+    //! Histogram for number of outstanding requests per cycle.
+    Histogram m_outstandReqHist;
+
     class SequencerWakeupEvent : public Event
     {
       private: