mru_rp.cc (12606:3bb0c54096e8) | mru_rp.cc (12684:44ebd2bc020f) |
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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 | 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 "debug/CacheRepl.hh" | 33#include <memory> |
34 35MRURP::MRURP(const Params *p) 36 : BaseReplacementPolicy(p) 37{ 38} 39 40void | 34 35MRURP::MRURP(const Params *p) 36 : BaseReplacementPolicy(p) 37{ 38} 39 40void |
41MRURP::touch(CacheBlk *blk) | 41MRURP::invalidate(const std::shared_ptr<ReplacementData>& replacement_data) 42const |
42{ | 43{ |
43 BaseReplacementPolicy::touch(blk); | 44 // Reset last touch timestamp 45 std::static_pointer_cast<MRUReplData>( 46 replacement_data)->lastTouchTick = Tick(0); 47} |
44 | 48 |
49void 50MRURP::touch(const std::shared_ptr<ReplacementData>& replacement_data) const 51{ |
|
45 // Update last touch timestamp | 52 // Update last touch timestamp |
46 blk->lastTouchTick = curTick(); | 53 std::static_pointer_cast<MRUReplData>( 54 replacement_data)->lastTouchTick = curTick(); |
47} 48 49void | 55} 56 57void |
50MRURP::reset(CacheBlk *blk) | 58MRURP::reset(const std::shared_ptr<ReplacementData>& replacement_data) const |
51{ | 59{ |
52 BaseReplacementPolicy::reset(blk); 53 | |
54 // Set last touch timestamp | 60 // Set last touch timestamp |
55 blk->lastTouchTick = blk->tickInserted; | 61 std::static_pointer_cast<MRUReplData>( 62 replacement_data)->lastTouchTick = curTick(); |
56} 57 | 63} 64 |
58CacheBlk* 59MRURP::getVictim(const ReplacementCandidates& candidates) | 65ReplaceableEntry* 66MRURP::getVictim(const ReplacementCandidates& candidates) const |
60{ 61 // There must be at least one replacement candidate 62 assert(candidates.size() > 0); 63 64 // Visit all candidates to find victim | 67{ 68 // There must be at least one replacement candidate 69 assert(candidates.size() > 0); 70 71 // Visit all candidates to find victim |
65 CacheBlk* blk = candidates[0]; | 72 ReplaceableEntry* victim = candidates[0]; |
66 for (const auto& candidate : candidates) { | 73 for (const auto& candidate : candidates) { |
67 // Stop iteration if found an invalid block 68 if (!candidate->isValid()) { 69 blk = candidate; 70 break; 71 // Update victim block if necessary 72 } else if (candidate->lastTouchTick > blk->lastTouchTick) { 73 blk = candidate; | 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; |
74 } 75 } 76 | 80 } 81 } 82 |
77 DPRINTF(CacheRepl, "set %x, way %x: selecting blk for replacement\n", 78 blk->set, blk->way); | 83 return victim; 84} |
79 | 85 |
80 return blk; | 86std::shared_ptr<ReplacementData> 87MRURP::instantiateEntry() 88{ 89 return std::shared_ptr<ReplacementData>(new MRUReplData()); |
81} 82 83MRURP* 84MRURPParams::create() 85{ 86 return new MRURP(this); 87} | 90} 91 92MRURP* 93MRURPParams::create() 94{ 95 return new MRURP(this); 96} |