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Diffstat (limited to 'src/mem/cache/tags/split.cc')
| -rw-r--r-- | src/mem/cache/tags/split.cc | 419 |
1 files changed, 0 insertions, 419 deletions
diff --git a/src/mem/cache/tags/split.cc b/src/mem/cache/tags/split.cc deleted file mode 100644 index 5bed44bd3..000000000 --- a/src/mem/cache/tags/split.cc +++ /dev/null @@ -1,419 +0,0 @@ -/* - * Copyright (c) 2004-2005 The Regents of The University of Michigan - * 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: Lisa Hsu - */ - -/** - * @file - * Definitions of split cache tag store. - */ - -#include <string> -#include <iostream> -#include <fstream> - -#include "base/cprintf.hh" -#include "base/intmath.hh" -#include "base/output.hh" -#include "base/trace.hh" -#include "mem/cache/base.hh" -#include "mem/cache/tags/split.hh" -#include "mem/cache/tags/split_lifo.hh" -#include "mem/cache/tags/split_lru.hh" - - -using namespace std; -using namespace TheISA; - -// create and initialize a partitioned cache structure -Split::Split(int _numSets, int _blkSize, int total_ways, int LRU1_assoc, - bool _lifo, bool _two_queue, int _hit_latency) : - numSets(_numSets), blkSize(_blkSize), lifo(_lifo), hitLatency(_hit_latency) -{ - DPRINTF(Split, "new split cache!!\n"); - - DPRINTF(Split, "lru has %d numSets, %d blkSize, %d assoc, and %d hit_latency\n", - numSets, blkSize, LRU1_assoc, hitLatency); - - lru = new SplitLRU(_numSets, _blkSize, LRU1_assoc, _hit_latency, 1); - - if (total_ways - LRU1_assoc == 0) { - lifo_net = NULL; - lru_net = NULL; - } else { - if (lifo) { - DPRINTF(Split, "Other partition is a LIFO with size %d in bytes. it gets %d ways\n", - (total_ways - LRU1_assoc)*_numSets*_blkSize, (total_ways - LRU1_assoc)); - lifo_net = new SplitLIFO(_blkSize, (total_ways - LRU1_assoc)*_numSets*_blkSize, - (total_ways - LRU1_assoc), _hit_latency, _two_queue, 2); - lru_net = NULL; - } - else { - DPRINTF(Split, "other LRU gets %d ways\n", total_ways - LRU1_assoc); - lru_net = new SplitLRU(_numSets, _blkSize, total_ways - LRU1_assoc, _hit_latency, 2); - lifo_net = NULL; - } - } - - blkMask = blkSize - 1; - - if (!isPowerOf2(total_ways)) - warn("total cache ways/columns %d should be power of 2", - total_ways); - - warmedUp = false; - /** @todo Make warmup percentage a parameter. */ - warmupBound = numSets * total_ways; - -} - -Split::~Split() -{ - delete lru; - if (lifo) - delete lifo_net; - else - delete lru_net; -} - -void -Split::regStats(const string &name) -{ - using namespace Stats; - - BaseTags::regStats(name); - - usedEvictDist.init(0,3000,40); - unusedEvictDist.init(0,3000,40); - useByCPUCycleDist.init(0,35,1); - - nic_repl - .name(name + ".nic_repl") - .desc("number of replacements in the nic partition") - .precision(0) - ; - - cpu_repl - .name(name + ".cpu_repl") - .desc("number of replacements in the cpu partition") - .precision(0) - ; - - lru->regStats(name + ".lru"); - - if (lifo && lifo_net) { - lifo_net->regStats(name + ".lifo_net"); - } else if (lru_net) { - lru_net->regStats(name + ".lru_net"); - } - - nicUsedWhenEvicted - .name(name + ".nicUsedWhenEvicted") - .desc("number of NIC blks that were used before evicted") - ; - - nicUsedTotLatency - .name(name + ".nicUsedTotLatency") - .desc("total cycles before eviction of used NIC blks") - ; - - nicUsedTotEvicted - .name(name + ".nicUsedTotEvicted") - .desc("total number of used NIC blks evicted") - ; - - nicUsedAvgLatency - .name(name + ".nicUsedAvgLatency") - .desc("avg number of cycles a used NIC blk is in cache") - .precision(0) - ; - nicUsedAvgLatency = nicUsedTotLatency / nicUsedTotEvicted; - - usedEvictDist - .name(name + ".usedEvictDist") - .desc("distribution of used NIC blk eviction times") - .flags(pdf | cdf) - ; - - nicUnusedWhenEvicted - .name(name + ".nicUnusedWhenEvicted") - .desc("number of NIC blks that were unused when evicted") - ; - - nicUnusedTotLatency - .name(name + ".nicUnusedTotLatency") - .desc("total cycles before eviction of unused NIC blks") - ; - - nicUnusedTotEvicted - .name(name + ".nicUnusedTotEvicted") - .desc("total number of unused NIC blks evicted") - ; - - nicUnusedAvgLatency - .name(name + ".nicUnusedAvgLatency") - .desc("avg number of cycles an unused NIC blk is in cache") - .precision(0) - ; - nicUnusedAvgLatency = nicUnusedTotLatency / nicUnusedTotEvicted; - - unusedEvictDist - .name(name + ".unusedEvictDist") - .desc("distribution of unused NIC blk eviction times") - .flags(pdf | cdf) - ; - - nicUseByCPUCycleTotal - .name(name + ".nicUseByCPUCycleTotal") - .desc("total latency of NIC blks til usage time") - ; - - nicBlksUsedByCPU - .name(name + ".nicBlksUsedByCPU") - .desc("total number of NIC blks used") - ; - - nicAvgUsageByCPULatency - .name(name + ".nicAvgUsageByCPULatency") - .desc("average number of cycles before a NIC blk that is used gets used") - .precision(0) - ; - nicAvgUsageByCPULatency = nicUseByCPUCycleTotal / nicBlksUsedByCPU; - - useByCPUCycleDist - .name(name + ".useByCPUCycleDist") - .desc("the distribution of cycle time in cache before NIC blk is used") - .flags(pdf | cdf) - ; - - cpuUsedBlks - .name(name + ".cpuUsedBlks") - .desc("number of cpu blks that were used before evicted") - ; - - cpuUnusedBlks - .name(name + ".cpuUnusedBlks") - .desc("number of cpu blks that were unused before evicted") - ; - - nicAvgLatency - .name(name + ".nicAvgLatency") - .desc("avg number of cycles a NIC blk is in cache before evicted") - .precision(0) - ; - nicAvgLatency = (nicUnusedTotLatency + nicUsedTotLatency) / - (nicUnusedTotEvicted + nicUsedTotEvicted); - - NR_CP_hits - .name(name + ".NR_CP_hits") - .desc("NIC requests hitting in CPU Partition") - ; - - NR_NP_hits - .name(name + ".NR_NP_hits") - .desc("NIC requests hitting in NIC Partition") - ; - - CR_CP_hits - .name(name + ".CR_CP_hits") - .desc("CPU requests hitting in CPU partition") - ; - - CR_NP_hits - .name(name + ".CR_NP_hits") - .desc("CPU requests hitting in NIC partition") - ; - -} - -// probe cache for presence of given block. -bool -Split::probe(Addr addr) const -{ - bool success = lru->probe(addr); - if (!success) { - if (lifo && lifo_net) - success = lifo_net->probe(addr); - else if (lru_net) - success = lru_net->probe(addr); - } - - return success; -} - - -SplitBlk* -Split::findBlock(Addr addr, int &lat) -{ - SplitBlk *blk = lru->findBlock(addr, lat); - if (!blk) { - if (lifo && lifo_net) { - blk = lifo_net->findBlock(addr, lat); - } else if (lru_net) { - blk = lru_net->findBlock(addr, lat); - } - } - - return blk; -} - -SplitBlk* -Split::findBlock(Addr addr) const -{ - SplitBlk *blk = lru->findBlock(addr); - if (!blk) { - if (lifo && lifo_net) { - blk = lifo_net->findBlock(addr); - } else if (lru_net) { - blk = lru_net->findBlock(addr); - } - } - - return blk; -} - -SplitBlk* -Split::findReplacement(Addr addr, PacketList &writebacks) -{ - SplitBlk *blk = NULL; - - assert(0); -#if 0 - if (pkt->nic_pkt()) { - DPRINTF(Split, "finding a replacement for nic_req\n"); - nic_repl++; - if (lifo && lifo_net) - blk = lifo_net->findReplacement(addr, writebacks); - else if (lru_net) - blk = lru_net->findReplacement(addr, writebacks); - // in this case, this is an LRU only cache, it's non partitioned - else - blk = lru->findReplacement(addr, writebacks); - } else { - DPRINTF(Split, "finding replacement for cpu_req\n"); - blk = lru->findReplacement(addr, writebacks); - cpu_repl++; - } - - Tick latency = curTick - blk->ts; - if (blk->isNIC) { - if (blk->isUsed) { - nicUsedWhenEvicted++; - usedEvictDist.sample(latency); - nicUsedTotLatency += latency; - nicUsedTotEvicted++; - } else { - nicUnusedWhenEvicted++; - unusedEvictDist.sample(latency); - nicUnusedTotLatency += latency; - nicUnusedTotEvicted++; - } - } else { - if (blk->isUsed) { - cpuUsedBlks++; - } else { - cpuUnusedBlks++; - } - } - - // blk attributes for the new blk coming IN - blk->ts = curTick; - blk->isNIC = (pkt->nic_pkt()) ? true : false; -#endif - - return blk; -} - -void -Split::invalidateBlk(Split::BlkType *blk) -{ - if (!blk) { - fatal("FIXME!\n"); -#if 0 - if (lifo && lifo_net) - blk = lifo_net->findBlock(addr); - else if (lru_net) - blk = lru_net->findBlock(addr); -#endif - - if (!blk) - return; - } - - blk->status = 0; - blk->isTouched = false; - tagsInUse--; -} - -void -Split::cleanupRefs() -{ - lru->cleanupRefs(); - if (lifo && lifo_net) - lifo_net->cleanupRefs(); - else if (lru_net) - lru_net->cleanupRefs(); - - ostream *memPrint = simout.create("memory_footprint.txt"); - - // this shouldn't be here but it happens at the end, which is what i want - memIter end = memHash.end(); - for (memIter iter = memHash.begin(); iter != end; ++iter) { - ccprintf(*memPrint, "%8x\t%d\n", (*iter).first, (*iter).second); - } -} - -Addr -Split::regenerateBlkAddr(Addr tag, int set) const -{ - if (lifo_net) - return lifo_net->regenerateBlkAddr(tag, set); - else - return lru->regenerateBlkAddr(tag, set); -} - -Addr -Split::extractTag(Addr addr) const -{ - // need to fix this if we want to use it... old interface of - // passing in blk was too weird - assert(0); - return 0; -/* - if (blk->part == 2) { - if (lifo_net) - return lifo_net->extractTag(addr); - else if (lru_net) - return lru_net->extractTag(addr); - else - panic("this shouldn't happen"); - } else - return lru->extractTag(addr); -*/ -} - |