Daniel Carvalho has uploaded this change for review. (
https://gem5-review.googlesource.com/8981
Change subject: mem-cache: BRRIP Replacement Policy
......................................................................
mem-cache: BRRIP Replacement Policy
Implementation of a Bimodal RRIP replacement policy.
Change-Id: Iba716eb5df2bf2be156e765f889d94f6ad00c91b
---
M src/mem/cache/replacement_policies/ReplacementPolicies.py
M src/mem/cache/replacement_policies/SConscript
A src/mem/cache/replacement_policies/brrip_rp.cc
A src/mem/cache/replacement_policies/brrip_rp.hh
4 files changed, 142 insertions(+), 0 deletions(-)
diff --git a/src/mem/cache/replacement_policies/ReplacementPolicies.py
b/src/mem/cache/replacement_policies/ReplacementPolicies.py
index 5798ae8..6306b0e 100644
--- a/src/mem/cache/replacement_policies/ReplacementPolicies.py
+++ b/src/mem/cache/replacement_policies/ReplacementPolicies.py
@@ -52,3 +52,10 @@
max_RRPV = Param.Unsigned(3, "Maximum RRPV possible")
hit_priority = Param.Bool(False,
"Prioritize evicting blocks that havent had a hit recently")
+
+class BRRIPRP(RRIPRP):
+ type = 'BRRIPRP'
+ cxx_class = 'BRRIPRP'
+ cxx_header = "mem/cache/replacement_policies/brrip_rp.hh"
+ btp = Param.Percent(3,
+ "Percentage of blocks to be inserted with long RRPV")
diff --git a/src/mem/cache/replacement_policies/SConscript
b/src/mem/cache/replacement_policies/SConscript
index ebe5397..9a29de0 100644
--- a/src/mem/cache/replacement_policies/SConscript
+++ b/src/mem/cache/replacement_policies/SConscript
@@ -33,6 +33,7 @@
SimObject('ReplacementPolicies.py')
Source('base.cc')
+Source('brrip_rp.cc')
Source('lru_rp.cc')
Source('random_rp.cc')
Source('rrip_rp.cc')
diff --git a/src/mem/cache/replacement_policies/brrip_rp.cc
b/src/mem/cache/replacement_policies/brrip_rp.cc
new file mode 100644
index 0000000..ed565d4
--- /dev/null
+++ b/src/mem/cache/replacement_policies/brrip_rp.cc
@@ -0,0 +1,56 @@
+/**
+ * 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/brrip_rp.hh"
+
+#include "base/random.hh"
+#include "debug/CacheRepl.hh"
+
+BRRIPRP::BRRIPRP(const Params *p)
+ : RRIPRP(p), btp(p->btp)
+{
+}
+
+void
+BRRIPRP::reset(CacheBlk *blk)
+{
+ RRIPRP::reset(blk);
+
+ // Reset RRPV
+ // Blocks are inserted as "long re-reference" if lower than btp,
+ // "distant re-reference" otherwise
+ blk->replData.rrpv = maxRRPV-(random_mt.random<unsigned>(1, 100) <=
btp);
+}
+
+BRRIPRP*
+BRRIPRPParams::create()
+{
+ return new BRRIPRP(this);
+}
diff --git a/src/mem/cache/replacement_policies/brrip_rp.hh
b/src/mem/cache/replacement_policies/brrip_rp.hh
new file mode 100644
index 0000000..83fcc94
--- /dev/null
+++ b/src/mem/cache/replacement_policies/brrip_rp.hh
@@ -0,0 +1,78 @@
+/**
+ * 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
+ */
+
+/**
+ * @file
+ * Declaration of a Bimodal RRIP replacement policy.
+ * BRRIP is an extension of RRIP that has a probability of inserting blocks
+ * with long re-reference interval.
+
+ */
+
+#ifndef __MEM_CACHE_REPLACEMENT_POLICIES_BRRIP_RP_HH__
+#define __MEM_CACHE_REPLACEMENT_POLICIES_BRRIP_RP_HH__
+
+#include "mem/cache/replacement_policies/rrip_rp.hh"
+#include "params/BRRIPRP.hh"
+
+class BRRIPRP : public RRIPRP
+{
+ protected:
+ /**
+ * Bimodal throtle parameter. Value in the range [0,100] used to decide
+ * if a new block is inserted with long or distant re-reference.
+ */
+ const unsigned btp;
+
+ public:
+ /** Convenience typedef. */
+ typedef BRRIPRPParams Params;
+
+ /**
+ * Construct and initiliaze this replacement policy.
+ */
+ BRRIPRP(const Params *p);
+
+ /**
+ * Destructor.
+ */
+ ~BRRIPRP() {}
+
+ /**
+ * Reset replacement data for a block. Used when a block is inserted.
+ * Sets the insertion tick, and update correspondent replacement data.
+ * Set RRPV according to the insertion policy used.
+ *
+ * @param blk Cache block to be reset.
+ */
+ void reset(CacheBlk *blk) override;
+};
+
+#endif // __MEM_CACHE_REPLACEMENT_POLICIES_BRRIP_RP_HH__
--
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Gerrit-Project: public/gem5
Gerrit-Branch: master
Gerrit-Change-Id: Iba716eb5df2bf2be156e765f889d94f6ad00c91b
Gerrit-Change-Number: 8981
Gerrit-PatchSet: 1
Gerrit-Owner: Daniel Carvalho <oda...@yahoo.com.br>
Gerrit-MessageType: newchange
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