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, 8 insertions, 0 deletions

diff --git a/src/cpu/o3/lsq_unit_impl.hh b/src/cpu/o3/lsq_unit_impl.hh
index a4cb56767..f0b27ba41 100644
--- a/src/cpu/o3/lsq_unit_impl.hh
+++ b/src/cpu/o3/lsq_unit_impl.hh
@@ -51,6 +51,7 @@
 #include "debug/Activity.hh"
 #include "debug/IEW.hh"
 #include "debug/LSQUnit.hh"
+#include "debug/O3PipeView.hh"
 #include "mem/packet.hh"
 #include "mem/request.hh"
 
@@ -1137,6 +1138,13 @@ LSQUnit<Impl>::completeStore(int store_idx)
             "idx:%i\n",
             storeQueue[store_idx].inst->seqNum, store_idx, storeHead);
 
+#if TRACING_ON
+    if (DTRACE(O3PipeView)) {
+        storeQueue[store_idx].inst->storeTick =
+            curTick() - storeQueue[store_idx].inst->fetchTick;
+    }
+#endif
+
     if (isStalled() &&
         storeQueue[store_idx].inst->seqNum == stallingStoreIsn) {
         DPRINTF(LSQUnit, "Unstalling, stalling store [sn:%lli] "