Daniel Carvalho has uploaded this change for review. (
https://gem5-review.googlesource.com/9003
Change subject: mem-cache: Create BIP Replacement Policy
..
mem-cache: Create BIP Replacement Policy
Implementation of a Bimodal Insertion Policy replacement policy.
Change-Id: Ife058d0d4310dbcb35858348006189f0b2bf7c37
---
M src/mem/cache/replacement_policies/ReplacementPolicies.py
M src/mem/cache/replacement_policies/SConscript
A src/mem/cache/replacement_policies/bip_rp.cc
A src/mem/cache/replacement_policies/bip_rp.hh
4 files changed, 146 insertions(+), 0 deletions(-)
diff --git a/src/mem/cache/replacement_policies/ReplacementPolicies.py
b/src/mem/cache/replacement_policies/ReplacementPolicies.py
index 0faa524..e913d7f 100644
--- a/src/mem/cache/replacement_policies/ReplacementPolicies.py
+++ b/src/mem/cache/replacement_policies/ReplacementPolicies.py
@@ -40,6 +40,12 @@
cxx_class = 'LRURP'
cxx_header = "mem/cache/replacement_policies/lru_rp.hh"
+class BIPRP(LRURP):
+type = 'BIPRP'
+cxx_class = 'BIPRP'
+cxx_header = "mem/cache/replacement_policies/bip_rp.hh"
+btp = Param.Percent(3, "Percentage of blocks to be inserted as MRU")
+
class RandomRP(BaseReplacementPolicy):
type = 'RandomRP'
cxx_class = 'RandomRP'
diff --git a/src/mem/cache/replacement_policies/SConscript
b/src/mem/cache/replacement_policies/SConscript
index c3c8992..c39e571 100644
--- a/src/mem/cache/replacement_policies/SConscript
+++ b/src/mem/cache/replacement_policies/SConscript
@@ -33,5 +33,6 @@
SimObject('ReplacementPolicies.py')
Source('base.cc')
+Source('bip_rp.cc')
Source('lru_rp.cc')
Source('random_rp.cc')
diff --git a/src/mem/cache/replacement_policies/bip_rp.cc
b/src/mem/cache/replacement_policies/bip_rp.cc
new file mode 100644
index 000..bd269c9
--- /dev/null
+++ b/src/mem/cache/replacement_policies/bip_rp.cc
@@ -0,0 +1,55 @@
+/**
+ * Copyright (c) 2018 Inria
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote products derived from
+ * this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * Authors: Daniel Carvalho
+ */
+
+#include "mem/cache/replacement_policies/bip_rp.hh"
+
+#include "base/random.hh"
+#include "debug/CacheRepl.hh"
+
+BIPRP::BIPRP(const Params *p)
+: LRURP(p), btp(p->btp)
+{
+}
+
+void
+BIPRP::reset(CacheBlk *blk)
+{
+BaseReplacementPolicy::reset(blk);
+
+// Blocks are inserted as MRU if lower than btp, LRU otherwise
+blk->lastTouchTick = (random_mt.random(1, 100) <= btp)*
+ curTick();
+}
+
+BIPRP*
+BIPRPParams::create()
+{
+return new BIPRP(this);
+}
diff --git a/src/mem/cache/replacement_policies/bip_rp.hh
b/src/mem/cache/replacement_policies/bip_rp.hh
new file mode 100644
index 000..f6e2a9c
--- /dev/null
+++ b/src/mem/cache/replacement_policies/bip_rp.hh
@@ -0,0 +1,84 @@
+/**
+ * Copyright (c) 2018 Inria
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are
+ * met: redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer;
+ * redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution;
+ * neither the name of the copyright holders nor the names of its
+ * contributors may be used to endorse or promote produc
