bip_rp.cc

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#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);
}