From 65a703c6bf08217a7ca92d2c3f834de5c8ed98b0 Mon Sep 17 00:00:00 2001 From: "Daniel R. Carvalho" Date: Mon, 12 Mar 2018 12:22:54 +0100 Subject: mem-cache: Create BIP Replacement Policy Implementation of a Bimodal Insertion Policy replacement policy. Change-Id: Ife058d0d4310dbcb35858348006189f0b2bf7c37 Reviewed-on: https://gem5-review.googlesource.com/9003 Reviewed-by: Nikos Nikoleris Maintainer: Nikos Nikoleris --- src/mem/cache/replacement_policies/bip_rp.cc | 59 ++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 src/mem/cache/replacement_policies/bip_rp.cc (limited to 'src/mem/cache/replacement_policies/bip_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 000000000..215711bb9 --- /dev/null +++ b/src/mem/cache/replacement_policies/bip_rp.cc @@ -0,0 +1,59 @@ +/** + * 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 + if (random_mt.random(1, 100) <= btp) { + blk->lastTouchTick = curTick(); + } else { + // Make their timestamps as old as possible, so that they become LRU + blk->lastTouchTick = 0; + } +} + +BIPRP* +BIPRPParams::create() +{ + return new BIPRP(this); +} -- cgit v1.2.3