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/**
* 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 <memory>
#include "base/random.hh"
#include "params/BIPRP.hh"
BIPRP::BIPRP(const Params *p)
: LRURP(p), btp(p->btp)
{
}
void
BIPRP::reset(const std::shared_ptr<ReplacementData>& replacement_data) const
{
std::shared_ptr<LRUReplData> casted_replacement_data =
std::static_pointer_cast<LRUReplData>(replacement_data);
// Entries are inserted as MRU if lower than btp, LRU otherwise
if (random_mt.random<unsigned>(1, 100) <= btp) {
casted_replacement_data->lastTouchTick = curTick();
} else {
// Make their timestamps as old as possible, so that they become LRU
casted_replacement_data->lastTouchTick = 1;
}
}
BIPRP*
BIPRPParams::create()
{
return new BIPRP(this);
}
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