1/** 2 * Copyright (c) 2018 Inria 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions are 7 * met: redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer; --- 16 unchanged lines hidden (view full) --- 25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 27 * 28 * Authors: Daniel Carvalho 29 */ 30 31#include "mem/cache/replacement_policies/mru_rp.hh" 32 |
33#include <memory> |
34 35MRURP::MRURP(const Params *p) 36 : BaseReplacementPolicy(p) 37{ 38} 39 40void |
41MRURP::invalidate(const std::shared_ptr<ReplacementData>& replacement_data) 42const |
43{ |
44 // Reset last touch timestamp 45 std::static_pointer_cast<MRUReplData>( 46 replacement_data)->lastTouchTick = Tick(0); 47} |
48 |
49void 50MRURP::touch(const std::shared_ptr<ReplacementData>& replacement_data) const 51{ |
52 // Update last touch timestamp |
53 std::static_pointer_cast<MRUReplData>( 54 replacement_data)->lastTouchTick = curTick(); |
55} 56 57void |
58MRURP::reset(const std::shared_ptr<ReplacementData>& replacement_data) const |
59{ |
60 // Set last touch timestamp |
61 std::static_pointer_cast<MRUReplData>( 62 replacement_data)->lastTouchTick = curTick(); |
63} 64 |
65ReplaceableEntry* 66MRURP::getVictim(const ReplacementCandidates& candidates) const |
67{ 68 // There must be at least one replacement candidate 69 assert(candidates.size() > 0); 70 71 // Visit all candidates to find victim |
72 ReplaceableEntry* victim = candidates[0]; |
73 for (const auto& candidate : candidates) { |
74 // Update victim entry if necessary 75 if (std::static_pointer_cast<MRUReplData>( 76 candidate->replacementData)->lastTouchTick > 77 std::static_pointer_cast<MRUReplData>( 78 victim->replacementData)->lastTouchTick) { 79 victim = candidate; |
80 } 81 } 82 |
83 return victim; 84} |
85 |
86std::shared_ptr<ReplacementData> 87MRURP::instantiateEntry() 88{ 89 return std::shared_ptr<ReplacementData>(new MRUReplData()); |
90} 91 92MRURP* 93MRURPParams::create() 94{ 95 return new MRURP(this); 96} |