o3: fix tick used for renaming and issue with range selection

Fixes the tick used from rename:
- previously this gathered the tick on leaving rename which was always 1 less
  than the dispatch. This conflated the decode ticks when back pressure built
  in the pipeline.
- now picks up tick on entry.

Added --store_completions flag:
- will additionally display the store completion tail in the viewer.
- this highlights periods when large numbers of stores are outstanding (>16 LSQ
  blocking)

Allows selection by tick range (previously this caused an infinite loop)

1 files changed, 4 insertions, 1 deletions

diff --git a/src/cpu/o3/iew_impl.hh b/src/cpu/o3/iew_impl.hh
index 4b4f66a1f..5bd5f6ae9 100644
--- a/src/cpu/o3/iew_impl.hh
+++ b/src/cpu/o3/iew_impl.hh
@@ -56,6 +56,7 @@
 #include "debug/Decode.hh"
 #include "debug/Drain.hh"
 #include "debug/IEW.hh"
+#include "debug/O3PipeView.hh"
 #include "params/DerivO3CPU.hh"
 
 using namespace std;
@@ -1611,7 +1612,9 @@ DefaultIEW<Impl>::updateExeInstStats(DynInstPtr &inst)
     iewExecutedInsts++;
 
 #if TRACING_ON
-    inst->completeTick = curTick() - inst->fetchTick;
+    if (DTRACE(O3PipeView)) {
+        inst->completeTick = curTick() - inst->fetchTick;
+    }
 #endif
 
     //