lru_rp.hh revision 12600
112600Sodanrc@yahoo.com.br/** 212600Sodanrc@yahoo.com.br * Copyright (c) 2018 Inria 312600Sodanrc@yahoo.com.br * All rights reserved. 412600Sodanrc@yahoo.com.br * 512600Sodanrc@yahoo.com.br * Redistribution and use in source and binary forms, with or without 612600Sodanrc@yahoo.com.br * modification, are permitted provided that the following conditions are 712600Sodanrc@yahoo.com.br * met: redistributions of source code must retain the above copyright 812600Sodanrc@yahoo.com.br * notice, this list of conditions and the following disclaimer; 912600Sodanrc@yahoo.com.br * redistributions in binary form must reproduce the above copyright 1012600Sodanrc@yahoo.com.br * notice, this list of conditions and the following disclaimer in the 1112600Sodanrc@yahoo.com.br * documentation and/or other materials provided with the distribution; 1212600Sodanrc@yahoo.com.br * neither the name of the copyright holders nor the names of its 1312600Sodanrc@yahoo.com.br * contributors may be used to endorse or promote products derived from 1412600Sodanrc@yahoo.com.br * this software without specific prior written permission. 1512600Sodanrc@yahoo.com.br * 1612600Sodanrc@yahoo.com.br * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 1712600Sodanrc@yahoo.com.br * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 1812600Sodanrc@yahoo.com.br * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 1912600Sodanrc@yahoo.com.br * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 2012600Sodanrc@yahoo.com.br * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 2112600Sodanrc@yahoo.com.br * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 2212600Sodanrc@yahoo.com.br * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2312600Sodanrc@yahoo.com.br * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2412600Sodanrc@yahoo.com.br * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2512600Sodanrc@yahoo.com.br * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 2612600Sodanrc@yahoo.com.br * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2712600Sodanrc@yahoo.com.br * 2812600Sodanrc@yahoo.com.br * Authors: Daniel Carvalho 2912600Sodanrc@yahoo.com.br */ 3012600Sodanrc@yahoo.com.br 3112600Sodanrc@yahoo.com.br/** 3212600Sodanrc@yahoo.com.br * @file 3312600Sodanrc@yahoo.com.br * Declaration of a Least Recently Used replacement policy. 3412600Sodanrc@yahoo.com.br * The victim is chosen using the timestamp. The timestamp may be true or 3512600Sodanrc@yahoo.com.br * pseudo, depending on the quantity of bits allocated for that. 3612600Sodanrc@yahoo.com.br */ 3712600Sodanrc@yahoo.com.br 3812600Sodanrc@yahoo.com.br#ifndef __MEM_CACHE_REPLACEMENT_POLICIES_LRU_RP_HH__ 3912600Sodanrc@yahoo.com.br#define __MEM_CACHE_REPLACEMENT_POLICIES_LRU_RP_HH__ 4012600Sodanrc@yahoo.com.br 4112600Sodanrc@yahoo.com.br#include "mem/cache/replacement_policies/base.hh" 4212600Sodanrc@yahoo.com.br#include "params/LRURP.hh" 4312600Sodanrc@yahoo.com.br 4412600Sodanrc@yahoo.com.brclass LRURP : public BaseReplacementPolicy 4512600Sodanrc@yahoo.com.br{ 4612600Sodanrc@yahoo.com.br public: 4712600Sodanrc@yahoo.com.br /** Convenience typedef. */ 4812600Sodanrc@yahoo.com.br typedef LRURPParams Params; 4912600Sodanrc@yahoo.com.br 5012600Sodanrc@yahoo.com.br /** 5112600Sodanrc@yahoo.com.br * Construct and initiliaze this replacement policy. 5212600Sodanrc@yahoo.com.br */ 5312600Sodanrc@yahoo.com.br LRURP(const Params *p); 5412600Sodanrc@yahoo.com.br 5512600Sodanrc@yahoo.com.br /** 5612600Sodanrc@yahoo.com.br * Destructor. 5712600Sodanrc@yahoo.com.br */ 5812600Sodanrc@yahoo.com.br ~LRURP() {} 5912600Sodanrc@yahoo.com.br 6012600Sodanrc@yahoo.com.br /** 6112600Sodanrc@yahoo.com.br * Touch a block to update its last touch tick. 6212600Sodanrc@yahoo.com.br * 6312600Sodanrc@yahoo.com.br * @param blk Cache block to be touched. 6412600Sodanrc@yahoo.com.br */ 6512600Sodanrc@yahoo.com.br void touch(CacheBlk *blk); 6612600Sodanrc@yahoo.com.br 6712600Sodanrc@yahoo.com.br /** 6812600Sodanrc@yahoo.com.br * Reset replacement data for a block. Used when a block is inserted. 6912600Sodanrc@yahoo.com.br * Sets its last touch tick as the current tick. 7012600Sodanrc@yahoo.com.br * 7112600Sodanrc@yahoo.com.br * @param blk Cache block to be reset. 7212600Sodanrc@yahoo.com.br */ 7312600Sodanrc@yahoo.com.br void reset(CacheBlk *blk); 7412600Sodanrc@yahoo.com.br 7512600Sodanrc@yahoo.com.br /** 7612600Sodanrc@yahoo.com.br * Find replacement victim using LRU timestamps. 7712600Sodanrc@yahoo.com.br * 7812600Sodanrc@yahoo.com.br * @param candidates Replacement candidates, selected by indexing policy. 7912600Sodanrc@yahoo.com.br * @return Cache block to be replaced. 8012600Sodanrc@yahoo.com.br */ 8112600Sodanrc@yahoo.com.br CacheBlk* getVictim(const ReplacementCandidates& candidates) override; 8212600Sodanrc@yahoo.com.br}; 8312600Sodanrc@yahoo.com.br 8412600Sodanrc@yahoo.com.br#endif // __MEM_CACHE_REPLACEMENT_POLICIES_LRU_RP_HH__ 85