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/O3CPU.py | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src/cpu/o3/O3CPU.py')

diff --git a/src/cpu/o3/O3CPU.py b/src/cpu/o3/O3CPU.py
index f379fcd8a..47b18a3ec 100644
--- a/src/cpu/o3/O3CPU.py
+++ b/src/cpu/o3/O3CPU.py
@@ -121,6 +121,8 @@ class DerivO3CPU(BaseCPU):
     LSQDepCheckShift = Param.Unsigned(4, "Number of places to shift addr before check")
     LSQCheckLoads = Param.Bool(True,
         "Should dependency violations be checked for loads & stores or just stores")
+    store_set_clear_period = Param.Unsigned(250000,
+            "Number of load/store insts before the dep predictor should be invalidated")
     LFSTSize = Param.Unsigned(1024, "Last fetched store table size")
     SSITSize = Param.Unsigned(1024, "Store set ID table size")
 
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