O3: Create a pipeline activity viewer for the O3 CPU model.

Implemented a pipeline activity viewer as a python script (util/o3-pipeview.py)
and modified O3 code base to support an extra trace flag (O3PipeView) for
generating traces to be used as inputs by the tool.

1 files changed, 11 insertions, 0 deletions

diff --git a/src/cpu/o3/dyn_inst.hh b/src/cpu/o3/dyn_inst.hh
index 2e434ea02..5fe1b2609 100644
--- a/src/cpu/o3/dyn_inst.hh
+++ b/src/cpu/o3/dyn_inst.hh
@@ -123,6 +123,17 @@ class BaseO3DynInst : public BaseDynInst<Impl>
     int _numDestMiscRegs;
 
   public:
+
+#if TRACING_ON
+    /** Tick records used for the pipeline activity viewer. */
+    Tick fetchTick;
+    Tick decodeTick;
+    Tick renameTick;
+    Tick dispatchTick;
+    Tick issueTick;
+    Tick completeTick;
+#endif
+
     /** Reads a misc. register, including any side-effects the read
      * might have as defined by the architecture.
      */