From b6203360ef684a8dc32981221336f5d216ce2668 Mon Sep 17 00:00:00 2001
From: Ali Saidi <Ali.Saidi@ARM.com>
Date: Fri, 19 Aug 2011 15:08:07 -0500
Subject: LSQ: Set store predictor to periodically clear itself as recommended
 in the storesets paper.

This patch improves performance by as much as 10% on some spec benchmarks.
---
 src/cpu/o3/mem_dep_unit_impl.hh | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

(limited to 'src/cpu/o3/mem_dep_unit_impl.hh')

diff --git a/src/cpu/o3/mem_dep_unit_impl.hh b/src/cpu/o3/mem_dep_unit_impl.hh
index 0208a622e..d30dcbd3d 100644
--- a/src/cpu/o3/mem_dep_unit_impl.hh
+++ b/src/cpu/o3/mem_dep_unit_impl.hh
@@ -45,8 +45,10 @@ MemDepUnit<MemDepPred, Impl>::MemDepUnit()
 template <class MemDepPred, class Impl>
 MemDepUnit<MemDepPred, Impl>::MemDepUnit(DerivO3CPUParams *params)
     : _name(params->name + ".memdepunit"),
-      depPred(params->SSITSize, params->LFSTSize), loadBarrier(false),
-      loadBarrierSN(0), storeBarrier(false), storeBarrierSN(0), iqPtr(NULL)
+      depPred(params->store_set_clear_period, params->SSITSize,
+              params->LFSTSize),
+      loadBarrier(false), loadBarrierSN(0), storeBarrier(false),
+      storeBarrierSN(0), iqPtr(NULL)
 {
     DPRINTF(MemDepUnit, "Creating MemDepUnit object.\n");
 }
@@ -85,7 +87,8 @@ MemDepUnit<MemDepPred, Impl>::init(DerivO3CPUParams *params, ThreadID tid)
     _name = csprintf("%s.memDep%d", params->name, tid);
     id = tid;
 
-    depPred.init(params->SSITSize, params->LFSTSize);
+    depPred.init(params->store_set_clear_period, params->SSITSize,
+            params->LFSTSize);
 }
 
 template <class MemDepPred, class Impl>
-- 
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