From 002f1b8b7e1d5292828e5157ff971965265140bc Mon Sep 17 00:00:00 2001
From: Korey Sewell <ksewell@umich.edu>
Date: Sun, 31 Jan 2010 18:29:49 -0500
Subject: [PATCH] inorder: add execution unit stats

---
 src/cpu/inorder/resources/execution_unit.cc | 17 +++++++++++++++++
 src/cpu/inorder/resources/execution_unit.hh |  5 +++++
 2 files changed, 22 insertions(+)

diff --git a/src/cpu/inorder/resources/execution_unit.cc b/src/cpu/inorder/resources/execution_unit.cc
index 6c44e2456..429291231 100644
--- a/src/cpu/inorder/resources/execution_unit.cc
+++ b/src/cpu/inorder/resources/execution_unit.cc
@@ -54,6 +54,17 @@ ExecutionUnit::regStats()
         .name(name() + ".predictedNotTakenIncorrect")
         .desc("Number of Branches Incorrectly Predicted As Not Taken).");
 
+    lastExecuteCycle = curTick;
+
+    cyclesExecuted
+        .name(name() + ".cyclesExecuted")
+        .desc("Number of Cycles Execution Unit was used.");
+
+    utilization
+        .name(name() + ".utilization")
+        .desc("Utilization of Execution Unit (cycles / totalCycles).");
+    utilization = cyclesExecuted / cpu->numCycles;
+
     Resource::regStats();
 }
 
@@ -75,6 +86,12 @@ ExecutionUnit::execute(int slot_num)
     {
       case ExecuteInst:
         {
+            if (curTick != lastExecuteCycle) {
+                lastExecuteCycle = curTick;
+                cyclesExecuted++;
+            }
+
+
             if (inst->isMemRef()) {
                 panic("%s not configured to handle memory ops.\n", resName);
             } else if (inst->isControl()) {
diff --git a/src/cpu/inorder/resources/execution_unit.hh b/src/cpu/inorder/resources/execution_unit.hh
index 46691bbf2..37651e873 100644
--- a/src/cpu/inorder/resources/execution_unit.hh
+++ b/src/cpu/inorder/resources/execution_unit.hh
@@ -71,6 +71,11 @@ class ExecutionUnit : public Resource {
     /////////////////////////////////////////////////////////////////
     Stats::Scalar predictedTakenIncorrect;
     Stats::Scalar predictedNotTakenIncorrect;
+
+    Stats::Scalar cyclesExecuted;
+    Tick lastExecuteCycle;
+
+    Stats::Formula utilization;
 };