diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/mem/cache/BaseCache.py | 7 | ||||
| -rw-r--r-- | src/mem/cache/builder.cc | 48 | ||||
| -rw-r--r-- | src/mem/cache/cache.cc | 8 | ||||
| -rw-r--r-- | src/mem/cache/tags/SConscript | 7 | ||||
| -rw-r--r-- | src/mem/cache/tags/iic.cc | 649 | ||||
| -rw-r--r-- | src/mem/cache/tags/iic.hh | 540 | ||||
| -rw-r--r-- | src/mem/cache/tags/iic_repl/Repl.py | 41 | ||||
| -rw-r--r-- | src/mem/cache/tags/iic_repl/gen.cc | 207 | ||||
| -rw-r--r-- | src/mem/cache/tags/iic_repl/gen.hh | 234 | ||||
| -rw-r--r-- | src/mem/cache/tags/iic_repl/repl.hh | 117 | ||||
| -rw-r--r-- | src/mem/config/cache.hh | 2 |
11 files changed, 6 insertions, 1854 deletions
diff --git a/src/mem/cache/BaseCache.py b/src/mem/cache/BaseCache.py index fe0d9ceb0..706a556ed 100644 --- a/src/mem/cache/BaseCache.py +++ b/src/mem/cache/BaseCache.py @@ -52,21 +52,14 @@ class BaseCache(MemObject): hit_latency = Param.Cycles("The hit latency for this cache") response_latency = Param.Cycles( "Additional cache latency for the return path to core on a miss"); - hash_delay = Param.Cycles(1, "time in cycles of hash access") max_miss_count = Param.Counter(0, "number of misses to handle before calling exit") mshrs = Param.Int("number of MSHRs (max outstanding requests)") - prioritizeRequests = Param.Bool(False, - "always service demand misses first") - repl = Param.Repl(NULL, "replacement policy") size = Param.MemorySize("capacity in bytes") forward_snoops = Param.Bool(True, "forward snoops from mem side to cpu side") is_top_level = Param.Bool(False, "Is this cache at the top level (e.g. L1)") - subblock_size = Param.Int(0, - "Size of subblock in IIC used for compression") tgts_per_mshr = Param.Int("max number of accesses per MSHR") - trace_addr = Param.Addr(0, "address to trace") two_queue = Param.Bool(False, "whether the lifo should have two queue replacement") write_buffers = Param.Int(8, "number of write buffers") diff --git a/src/mem/cache/builder.cc b/src/mem/cache/builder.cc index 6f1f841f8..7de8fbf9d 100644 --- a/src/mem/cache/builder.cc +++ b/src/mem/cache/builder.cc @@ -51,10 +51,6 @@ #include "mem/cache/tags/fa_lru.hh" #endif -#if defined(USE_CACHE_IIC) -#include "mem/cache/tags/iic.hh" -#endif - using namespace std; @@ -87,50 +83,16 @@ using namespace std; #define BUILD_LRU_CACHE BUILD_CACHE_PANIC("lru cache") #endif -#if defined(USE_CACHE_IIC) -#define BUILD_IIC_CACHE do { \ - IIC *tags = new IIC(iic_params); \ - BUILD_CACHE(IIC, tags); \ - } while (0) -#else -#define BUILD_IIC_CACHE BUILD_CACHE_PANIC("iic") -#endif - -#define BUILD_CACHES do { \ - if (repl == NULL) { \ - if (numSets == 1) { \ - BUILD_FALRU_CACHE; \ - } else { \ - BUILD_LRU_CACHE; \ - } \ - } else { \ - BUILD_IIC_CACHE; \ - } \ - } while (0) - BaseCache * BaseCacheParams::create() { int numSets = size / (assoc * block_size); - if (subblock_size == 0) { - subblock_size = block_size; - } -#if defined(USE_CACHE_IIC) - // Build IIC params - IIC::Params iic_params; - iic_params.size = size; - iic_params.numSets = numSets; - iic_params.blkSize = block_size; - iic_params.assoc = assoc; - iic_params.hashDelay = hash_delay; - iic_params.hitLatency = hit_latency; - iic_params.rp = repl; - iic_params.subblockSize = subblock_size; -#else - const void *repl = NULL; -#endif + if (numSets == 1) { + BUILD_FALRU_CACHE; + } else { + BUILD_LRU_CACHE; + } - BUILD_CACHES; return NULL; } diff --git a/src/mem/cache/cache.cc b/src/mem/cache/cache.cc index d403535fc..6a0669e06 100644 --- a/src/mem/cache/cache.cc +++ b/src/mem/cache/cache.cc @@ -46,10 +46,6 @@ #include "mem/cache/tags/fa_lru.hh" #endif -#if defined(USE_CACHE_IIC) -#include "mem/cache/tags/iic.hh" -#endif - #include "mem/cache/cache_impl.hh" // Template Instantiations @@ -60,10 +56,6 @@ template class Cache<FALRU>; #endif -#if defined(USE_CACHE_IIC) -template class Cache<IIC>; -#endif - #if defined(USE_CACHE_LRU) template class Cache<LRU>; #endif diff --git a/src/mem/cache/tags/SConscript b/src/mem/cache/tags/SConscript index a233e9684..5b30f55d6 100644 --- a/src/mem/cache/tags/SConscript +++ b/src/mem/cache/tags/SConscript @@ -35,12 +35,5 @@ if env['TARGET_ISA'] == 'no': Source('base.cc') Source('fa_lru.cc') -Source('iic.cc') Source('lru.cc') Source('cacheset.cc') - -SimObject('iic_repl/Repl.py') -Source('iic_repl/gen.cc') - -DebugFlag('IIC') -DebugFlag('IICMore') diff --git a/src/mem/cache/tags/iic.cc b/src/mem/cache/tags/iic.cc deleted file mode 100644 index b9e582c29..000000000 --- a/src/mem/cache/tags/iic.cc +++ /dev/null @@ -1,649 +0,0 @@ -/* - * Copyright (c) 2002-2005 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: Erik Hallnor - */ - -/** - * @file - * Definitions of the Indirect Index Cache tagstore. - */ - -#include <algorithm> -#include <cmath> -#include <string> -#include <vector> - -#include "base/intmath.hh" -#include "base/trace.hh" -#include "debug/Cache.hh" -#include "debug/IIC.hh" -#include "debug/IICMore.hh" -#include "mem/cache/tags/iic.hh" -#include "mem/cache/base.hh" -#include "sim/core.hh" - -using namespace std; - -/** Track the number of accesses to each cache set. */ -#define PROFILE_IIC 1 - -IIC::IIC(IIC::Params ¶ms) : - hashSets(params.numSets), blkSize(params.blkSize), assoc(params.assoc), - hitLatency(params.hitLatency), subSize(params.subblockSize), - numSub(blkSize/subSize), - trivialSize((floorLog2(params.size/subSize)*numSub)/8), - tagShift(floorLog2(blkSize)), blkMask(blkSize - 1), - subShift(floorLog2(subSize)), subMask(numSub - 1), - hashDelay(params.hashDelay), - numTags(hashSets * assoc + params.size/blkSize -1), - numSecondary(params.size/blkSize), - tagNull(numTags), - primaryBound(hashSets * assoc) -{ - // Check parameters - if (blkSize < 4 || !isPowerOf2(blkSize)) { - fatal("Block size must be at least 4 and a power of 2"); - } - if (hashSets <= 0 || !isPowerOf2(hashSets)) { - fatal("# of hashsets must be non-zero and a power of 2"); - } - if (assoc <= 0) { - fatal("associativity must be greater than zero"); - } - if (hitLatency <= 0) { - fatal("access latency must be greater than zero"); - } - if (numSub*subSize != blkSize) { - fatal("blocksize must be evenly divisible by subblock size"); - } - - // debug stuff - freeSecond = numSecondary; - - warmedUp = false; - warmupBound = params.size/blkSize; - numBlocks = params.size/subSize; - - // Replacement Policy Initialization - repl = params.rp; - repl->setIIC(this); - - //last_miss_time = 0 - - // allocate data reference counters - dataReferenceCount = new int[numBlocks]; - memset(dataReferenceCount, 0, numBlocks*sizeof(int)); - - // Allocate storage for both internal data and block fast access data. - // We allocate it as one large chunk to reduce overhead and to make - // deletion easier. - unsigned data_index = 0; - dataStore = new uint8_t[(numBlocks + numTags) * blkSize]; - dataBlks = new uint8_t*[numBlocks]; - for (unsigned i = 0; i < numBlocks; ++i) { - dataBlks[i] = &dataStore[data_index]; - freeDataBlock(i); - data_index += subSize; - } - - assert(data_index == numBlocks * subSize); - - // allocate and init tag store - tagStore = new IICTag[numTags]; - - unsigned blkIndex = 0; - // allocate and init sets - sets = new IICSet[hashSets]; - for (unsigned i = 0; i < hashSets; ++i) { - sets[i].assoc = assoc; - sets[i].tags = new IICTag*[assoc]; - sets[i].chain_ptr = tagNull; - - for (unsigned j = 0; j < assoc; ++j) { - IICTag *tag = &tagStore[blkIndex++]; - tag->chain_ptr = tagNull; - tag->data_ptr.resize(numSub); - tag->size = blkSize; - tag->trivialData = new uint8_t[trivialSize]; - tag->numData = 0; - sets[i].tags[j] = tag; - tag->set = i; - tag->data = &dataStore[data_index]; - data_index += blkSize; - } - } - - assert(blkIndex == primaryBound); - - for (unsigned i = primaryBound; i < tagNull; i++) { - tagStore[i].chain_ptr = i+1; - //setup data ptrs to subblocks - tagStore[i].data_ptr.resize(numSub); - tagStore[i].size = blkSize; - tagStore[i].trivialData = new uint8_t[trivialSize]; - tagStore[i].numData = 0; - tagStore[i].set = 0; - tagStore[i].data = &dataStore[data_index]; - data_index += blkSize; - } - freelist = primaryBound; -} - -IIC::~IIC() -{ - delete [] dataReferenceCount; - delete [] dataStore; - delete [] tagStore; - delete [] sets; - delete [] dataBlks; -} - -/* register cache stats */ -void -IIC::regStats(const string &name) -{ - using namespace Stats; - - BaseTags::regStats(name); - - hitHashDepth.init(0, 20, 1); - missHashDepth.init(0, 20, 1); - setAccess.init(0, hashSets, 1); - - /** IIC Statistics */ - hitHashDepth - .name(name + ".hit_hash_depth_dist") - .desc("Dist. of Hash lookup depths") - .flags(pdf) - ; - - missHashDepth - .name(name + ".miss_hash_depth_dist") - .desc("Dist. of Hash lookup depths") - .flags(pdf) - ; - - repl->regStatsWithSuffix(name); - - if (PROFILE_IIC) - setAccess - .name(name + ".set_access_dist") - .desc("Dist. of Accesses across sets") - .flags(pdf) - ; - - missDepthTotal - .name(name + ".miss_depth_total") - .desc("Total of miss depths") - ; - - hashMiss - .name(name + ".hash_miss") - .desc("Total of misses in hash table") - ; - - hitDepthTotal - .name(name + ".hit_depth_total") - .desc("Total of hit depths") - ; - - hashHit - .name(name + ".hash_hit") - .desc("Total of hites in hash table") - ; -} - - -IICTag* -IIC::accessBlock(Addr addr, Cycles &lat, int context_src) -{ - Addr tag = extractTag(addr); - unsigned set = hash(addr); - Cycles set_lat; - - unsigned long chain_ptr = tagNull; - - if (PROFILE_IIC) - setAccess.sample(set); - - IICTag *tag_ptr = sets[set].findTag(tag, chain_ptr); - set_lat = Cycles(1); - if (tag_ptr == NULL && chain_ptr != tagNull) { - int secondary_depth; - tag_ptr = secondaryChain(tag, chain_ptr, &secondary_depth); - set_lat += Cycles(secondary_depth); - // set depth for statistics fix this later!!! egh - sets[set].depth = set_lat; - - if (tag_ptr != NULL) { - /* need to move tag into primary table */ - // need to preserve chain: fix this egh - sets[set].tags[assoc-1]->chain_ptr = tag_ptr->chain_ptr; - tagSwap(tag_ptr - tagStore, sets[set].tags[assoc-1] - tagStore); - tag_ptr = sets[set].findTag(tag, chain_ptr); - assert(tag_ptr!=NULL); - } - - } - set_lat = Cycles(set_lat * hashDelay + hitLatency); - if (tag_ptr != NULL) { - // IIC replacement: if this is not the first element of - // list, reorder - sets[set].moveToHead(tag_ptr); - - hitHashDepth.sample(sets[set].depth); - hashHit++; - hitDepthTotal += sets[set].depth; - tag_ptr->status |= BlkReferenced; - lat = set_lat; - if (tag_ptr->whenReady > curTick() && - cache->ticksToCycles(tag_ptr->whenReady - curTick()) > set_lat) { - lat = cache->ticksToCycles(tag_ptr->whenReady - curTick()); - } - - tag_ptr->refCount += 1; - } - else { - // fall through: cache block not found, not a hit... - missHashDepth.sample(sets[set].depth); - hashMiss++; - missDepthTotal += sets[set].depth; - lat = set_lat; - } - return tag_ptr; -} - - -IICTag* -IIC::findBlock(Addr addr) const -{ - Addr tag = extractTag(addr); - unsigned set = hash(addr); - - unsigned long chain_ptr = tagNull; - - IICTag *tag_ptr = sets[set].findTag(tag, chain_ptr); - if (tag_ptr == NULL && chain_ptr != tagNull) { - int secondary_depth; - tag_ptr = secondaryChain(tag, chain_ptr, &secondary_depth); - } - return tag_ptr; -} - - -IICTag* -IIC::findVictim(Addr addr, PacketList &writebacks) -{ - DPRINTF(IIC, "Finding Replacement for %x\n", addr); - unsigned set = hash(addr); - IICTag *tag_ptr; - unsigned long *tmp_data = new unsigned long[numSub]; - - // Get a enough subblocks for a full cache line - for (unsigned i = 0; i < numSub; ++i){ - tmp_data[i] = getFreeDataBlock(writebacks); - assert(dataReferenceCount[tmp_data[i]]==0); - } - - tag_ptr = getFreeTag(set, writebacks); - - tag_ptr->set = set; - for (unsigned i = 0; i < numSub; ++i) { - tag_ptr->data_ptr[i] = tmp_data[i]; - dataReferenceCount[tag_ptr->data_ptr[i]]++; - } - tag_ptr->numData = numSub; - assert(tag_ptr - tagStore < primaryBound); // make sure it is in primary - tag_ptr->chain_ptr = tagNull; - sets[set].moveToHead(tag_ptr); - delete [] tmp_data; - - list<unsigned long> tag_indexes; - repl->doAdvance(tag_indexes); -/* - while (!tag_indexes.empty()) { - if (!tagStore[tag_indexes.front()].isCompressed()) { - compress_blocks.push_back(&tagStore[tag_indexes.front()]); - } - tag_indexes.pop_front(); - } -*/ - - tag_ptr->re = (void*)repl->add(tag_ptr-tagStore); - - return tag_ptr; -} - -void -IIC::insertBlock(Addr addr, BlkType* blk, int context_src) -{ -} - -void -IIC::freeReplacementBlock(PacketList & writebacks) -{ - IICTag *tag_ptr; - unsigned long data_ptr; - /* consult replacement policy */ - tag_ptr = &tagStore[repl->getRepl()]; - assert(tag_ptr != NULL); - assert(tag_ptr->isValid()); - - DPRINTF(Cache, "Replacing %x in IIC: %s\n", - regenerateBlkAddr(tag_ptr->tag,0), - tag_ptr->isDirty() ? "writeback" : "clean"); - /* write back replaced block data */ - replacements[0]++; - totalRefs += tag_ptr->refCount; - ++sampledRefs; - tag_ptr->refCount = 0; - - if (tag_ptr->isDirty()) { -/* PacketPtr writeback = - buildWritebackReq(regenerateBlkAddr(tag_ptr->tag, 0), - tag_ptr->req->asid, tag_ptr->xc, blkSize, - tag_ptr->data, - tag_ptr->size); -*/ - Request *writebackReq = new Request(regenerateBlkAddr(tag_ptr->tag, 0), - blkSize, 0, Request::wbMasterId); - PacketPtr writeback = new Packet(writebackReq, MemCmd::Writeback); - writeback->allocate(); - memcpy(writeback->getPtr<uint8_t>(), tag_ptr->data, blkSize); - - writebacks.push_back(writeback); - } - - // free the data blocks - for (int i = 0; i < tag_ptr->numData; ++i) { - data_ptr = tag_ptr->data_ptr[i]; - assert(dataReferenceCount[data_ptr]>0); - if (--dataReferenceCount[data_ptr] == 0) { - freeDataBlock(data_ptr); - } - } - freeTag(tag_ptr); -} - -unsigned long -IIC::getFreeDataBlock(PacketList & writebacks) -{ - unsigned long data_ptr; - - /* find data block */ - while (blkFreelist.empty()) { - freeReplacementBlock(writebacks); - } - - data_ptr = blkFreelist.front(); - blkFreelist.pop_front(); - DPRINTF(IICMore,"Found free data at %d\n",data_ptr); - return data_ptr; -} - - - -IICTag* -IIC::getFreeTag(int set, PacketList & writebacks) -{ - unsigned long tag_index; - IICTag *tag_ptr; - // Add new tag - tag_ptr = sets[set].findFree(); - // if no free in primary, and secondary exists - if (!tag_ptr && numSecondary) { - // need to spill a tag into secondary storage - while (freelist == tagNull) { - // get replacements until one is in secondary - freeReplacementBlock(writebacks); - } - - tag_index = freelist; - freelist = tagStore[freelist].chain_ptr; - freeSecond--; - - assert(tag_index != tagNull); - tagSwap(tag_index, sets[set].tags[assoc-1] - tagStore); - tagStore[tag_index].chain_ptr = sets[set].chain_ptr; - sets[set].chain_ptr = tag_index; - - tag_ptr = sets[set].tags[assoc-1]; - } - DPRINTF(IICMore,"Found free tag at %d\n",tag_ptr - tagStore); - tagsInUse++; - if (!warmedUp && tagsInUse.value() >= warmupBound) { - warmedUp = true; - warmupCycle = curTick(); - } - - return tag_ptr; -} - -void -IIC::freeTag(IICTag *tag_ptr) -{ - unsigned long tag_index, tmp_index; - // Fix tag_ptr - if (tag_ptr) { - // we have a tag to clear - DPRINTF(IICMore,"Freeing Tag for %x\n", - regenerateBlkAddr(tag_ptr->tag,0)); - tagsInUse--; - tag_ptr->status = 0; - tag_ptr->numData = 0; - tag_ptr->re = NULL; - tag_index = tag_ptr - tagStore; - if (tag_index >= primaryBound) { - // tag_ptr points to secondary store - assert(tag_index < tagNull); // remove this?? egh - if (tag_ptr->chain_ptr == tagNull) { - // need to fix chain list - unsigned tmp_set = hash(tag_ptr->tag << tagShift); - if (sets[tmp_set].chain_ptr == tag_index) { - sets[tmp_set].chain_ptr = tagNull; - } else { - tmp_index = sets[tmp_set].chain_ptr; - while (tmp_index != tagNull - && tagStore[tmp_index].chain_ptr != tag_index) { - tmp_index = tagStore[tmp_index].chain_ptr; - } - assert(tmp_index != tagNull); - tagStore[tmp_index].chain_ptr = tagNull; - } - tag_ptr->chain_ptr = freelist; - freelist = tag_index; - freeSecond++; - } else { - // copy next chained entry to this tag location - tmp_index = tag_ptr->chain_ptr; - tagSwap(tmp_index, tag_index); - tagStore[tmp_index].chain_ptr = freelist; - freelist = tmp_index; - freeSecond++; - } - } else { - // tag_ptr in primary hash table - assert(tag_index < primaryBound); - tag_ptr->status = 0; - unsigned tmp_set = hash(tag_ptr->tag << tagShift); - if (sets[tmp_set].chain_ptr != tagNull) { // collapse chain - tmp_index = sets[tmp_set].chain_ptr; - tagSwap(tag_index, tmp_index); - tagStore[tmp_index].chain_ptr = freelist; - freelist = tmp_index; - freeSecond++; - sets[tmp_set].chain_ptr = tag_ptr->chain_ptr; - sets[tmp_set].moveToTail(tag_ptr); - } - } - } -} - -void -IIC::freeDataBlock(unsigned long data_ptr) -{ - assert(dataReferenceCount[data_ptr] == 0); - DPRINTF(IICMore, "Freeing data at %d\n", data_ptr); - blkFreelist.push_front(data_ptr); -} - -/** Use a simple modulo hash. */ -#define SIMPLE_HASH 0 - -unsigned -IIC::hash(Addr addr) const { -#if SIMPLE_HASH - return extractTag(addr) % iic_hash_size; -#else - Addr tag, mask, x, y; - tag = extractTag(addr); - mask = hashSets-1; /* assumes iic_hash_size is a power of 2 */ - x = tag & mask; - y = (tag >> (int)(::log((double)hashSets)/::log((double)2))) & mask; - assert (x < hashSets && y < hashSets); - return x ^ y; -#endif -} - - -void -IICSet::moveToHead(IICTag *tag) -{ - if (tags[0] == tag) - return; - - // write 'next' block into blks[i], moving up from MRU toward LRU - // until we overwrite the block we moved to head. - - // start by setting up to write 'blk' into blks[0] - int i = 0; - IICTag *next = tag; - - do { - assert(i < assoc); - // swap blks[i] and next - IICTag *tmp = tags[i]; - tags[i] = next; - next = tmp; - ++i; - } while (next != tag); -} - -void -IICSet::moveToTail(IICTag *tag) -{ - if (tags[assoc-1] == tag) - return; - - // write 'next' block into blks[i], moving up from MRU toward LRU - // until we overwrite the block we moved to head. - - // start by setting up to write 'blk' into blks[0] - int i = assoc - 1; - IICTag *next = tag; - - do { - assert(i >= 0); - // swap blks[i] and next - IICTag *tmp = tags[i]; - tags[i] = next; - next = tmp; - --i; - } while (next != tag); -} - -void -IIC::tagSwap(unsigned long index1, unsigned long index2) -{ - DPRINTF(IIC,"Swapping tag[%d]=%x for tag[%d]=%x\n",index1, - tagStore[index1].tag<<tagShift, index2, - tagStore[index2].tag<<tagShift); - IICTag tmp_tag; - tmp_tag = tagStore[index1]; - tagStore[index1] = tagStore[index2]; - tagStore[index2] = tmp_tag; - if (tagStore[index1].isValid()) - repl->fixTag(tagStore[index1].re, index2, index1); - if (tagStore[index2].isValid()) - repl->fixTag(tagStore[index2].re, index1, index2); -} - - -IICTag * -IIC::secondaryChain(Addr tag, unsigned long chain_ptr, - int *_depth) const -{ - int depth = 0; - while (chain_ptr != tagNull) { - DPRINTF(IIC,"Searching secondary at %d for %x\n", chain_ptr, - tag<<tagShift); - if (tagStore[chain_ptr].tag == tag && - (tagStore[chain_ptr].isValid())) { - *_depth = depth; - return &tagStore[chain_ptr]; - } - depth++; - chain_ptr = tagStore[chain_ptr].chain_ptr; - } - *_depth = depth; - return NULL; -} - -void -IIC::invalidate(IIC::BlkType *tag_ptr) -{ - if (tag_ptr) { - for (int i = 0; i < tag_ptr->numData; ++i) { - dataReferenceCount[tag_ptr->data_ptr[i]]--; - if (dataReferenceCount[tag_ptr->data_ptr[i]] == 0) { - freeDataBlock(tag_ptr->data_ptr[i]); - } - } - repl->removeEntry(tag_ptr->re); - freeTag(tag_ptr); - } -} - -void -IIC::clearLocks() -{ - for (int i = 0; i < numTags; i++){ - tagStore[i].clearLoadLocks(); - } -} - -void -IIC::cleanupRefs() -{ - for (unsigned i = 0; i < numTags; ++i) { - if (tagStore[i].isValid()) { - totalRefs += tagStore[i].refCount; - ++sampledRefs; - } - } -} diff --git a/src/mem/cache/tags/iic.hh b/src/mem/cache/tags/iic.hh deleted file mode 100644 index a41af8612..000000000 --- a/src/mem/cache/tags/iic.hh +++ /dev/null @@ -1,540 +0,0 @@ -/* - * Copyright (c) 2012 ARM Limited - * All rights reserved. - * - * The license below extends only to copyright in the software and shall - * not be construed as granting a license to any other intellectual - * property including but not limited to intellectual property relating - * to a hardware implementation of the functionality of the software - * licensed hereunder. You may use the software subject to the license - * terms below provided that you ensure that this notice is replicated - * unmodified and in its entirety in all distributions of the software, - * modified or unmodified, in source code or in binary form. - * - * Copyright (c) 2002-2005 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: Erik Hallnor - */ - -/** - * @file - * Declaration of the Indirect Index Cache (IIC) tags store. - */ - -#ifndef __IIC_HH__ -#define __IIC_HH__ - -#include <list> -#include <vector> - -#include "base/statistics.hh" -#include "mem/cache/tags/iic_repl/repl.hh" -#include "mem/cache/tags/base.hh" -#include "mem/cache/blk.hh" -#include "mem/packet.hh" - -class BaseCache; // Forward declaration - -/** - * IIC cache blk. - */ -class IICTag : public CacheBlk -{ - public: - /** - * Copy the contents of the given IICTag into this one. - * @param rhs The tag to copy. - * @return const reference to this tag. - */ - const IICTag& operator=(const IICTag& rhs) - { - CacheBlk::operator=(rhs); - chain_ptr = rhs.chain_ptr; - re = rhs.re; - set = rhs.set; - trivialData = rhs.trivialData; - numData = rhs.numData; - data_ptr.clear(); - for (int i = 0; i < rhs.numData; ++i) { - data_ptr.push_back(rhs.data_ptr[i]); - } - return *this; - } - - /** Hash chain pointer into secondary store. */ - unsigned long chain_ptr; - /** Data array pointers for each subblock. */ - std::vector<unsigned long> data_ptr; - /** Replacement Entry pointer. */ - void *re; - /** - * An array to store small compressed data. Conceputally the same size - * as the unsused data array pointers. - */ - uint8_t *trivialData; - /** - * The number of allocated subblocks. - */ - int numData; -}; - -/** - * A hash set for the IIC primary lookup table. - */ -class IICSet{ - public: - /** The associativity of the primary table. */ - int assoc; - - /** The number of hash chains followed when finding the last block. */ - int depth; - /** The current number of blocks on the chain. */ - int size; - - /** Tag pointer into the secondary tag storage. */ - unsigned long chain_ptr; - - /** The LRU list of the primary table. MRU is at 0 index. */ - IICTag ** tags; - - /** - * Find the addr in this set, return the chain pointer to the secondary if - * it isn't found. - * @param asid The address space ID. - * @param tag The address to find. - * @param chain_ptr The chain pointer to start the search of the secondary - * @return Pointer to the tag, NULL if not found. - */ - IICTag* findTag( Addr tag, unsigned long &chain_ptr) - { - depth = 1; - for (int i = 0; i < assoc; ++i) { - if (tags[i]->tag == tag && tags[i]->isValid()) { - return tags[i]; - } - } - chain_ptr = this->chain_ptr; - return 0; - } - - /** - * Find an usused tag in this set. - * @return Pointer to the unused tag, NULL if none are free. - */ - IICTag* findFree() - { - for (int i = 0; i < assoc; ++i) { - if (!tags[i]->isValid()) { - return tags[i]; - } - } - return 0; - } - - /** - * Move a tag to the head of the LRU list - * @param tag The tag to move. - */ - void moveToHead(IICTag *tag); - - /** - * Move a tag to the tail (LRU) of the LRU list - * @param tag The tag to move. - */ - void moveToTail(IICTag *tag); -}; - -/** - * The IIC tag store. This is a hardware-realizable, fully-associative tag - * store that uses software replacement, e.g. Gen. - */ -class IIC : public BaseTags -{ - public: - /** Typedef of the block type used in this class. */ - typedef IICTag BlkType; - /** Typedef for list of pointers to the local block type. */ - typedef std::list<IICTag*> BlkList; - - protected: - /** The number of set in the primary table. */ - const unsigned hashSets; - /** The block size in bytes. */ - const unsigned blkSize; - /** The associativity of the primary table. */ - const unsigned assoc; - /** The base hit latency. */ - const Cycles hitLatency; - /** The subblock size, used for compression. */ - const unsigned subSize; - - /** The number of subblocks */ - const unsigned numSub; - /** The number of bytes used by data pointers */ - const unsigned trivialSize; - - /** The amount to shift address to get the tag. */ - const unsigned tagShift; - /** The mask to get block offset bits. */ - const unsigned blkMask; - - /** The amount to shift to get the subblock number. */ - const unsigned subShift; - /** The mask to get the correct subblock number. */ - const unsigned subMask; - - /** The latency of a hash lookup. */ - const Cycles hashDelay; - /** The total number of tags in primary and secondary. */ - const unsigned numTags; - /** The number of tags in the secondary tag store. */ - const unsigned numSecondary; - - /** The Null tag pointer. */ - const unsigned tagNull; - /** The last tag in the primary table. */ - const unsigned primaryBound; - - /** All of the tags */ - IICTag *tagStore; - /** - * Pointer to the head of the secondary freelist (maintained with chain - * pointers. - */ - unsigned long freelist; - /** - * The data block freelist. - */ - std::list<unsigned long> blkFreelist; - - /** The primary table. */ - IICSet *sets; - - /** The replacement policy. */ - Repl *repl; - - /** An array of data reference counters. */ - int *dataReferenceCount; - - /** The data blocks. */ - uint8_t *dataStore; - - /** Storage for the fast access data of each cache block. */ - uint8_t **dataBlks; - - /** - * Count of the current number of free secondary tags. - * Used for debugging. - */ - int freeSecond; - - // IIC Statistics - /** - * @addtogroup IICStatistics IIC Statistics - * @{ - */ - - /** Hash hit depth of cache hits. */ - Stats::Distribution hitHashDepth; - /** Hash depth for cache misses. */ - Stats::Distribution missHashDepth; - /** Count of accesses to each hash set. */ - Stats::Distribution setAccess; - - /** The total hash depth for every miss. */ - Stats::Scalar missDepthTotal; - /** The total hash depth for all hits. */ - Stats::Scalar hitDepthTotal; - /** The number of hash misses. */ - Stats::Scalar hashMiss; - /** The number of hash hits. */ - Stats::Scalar hashHit; - /** @} */ - - public: - /** - * Collection of parameters for the IIC. - */ - class Params { - public: - /** The size in bytes of the cache. */ - unsigned size; - /** The number of sets in the primary table. */ - unsigned numSets; - /** The block size in bytes. */ - unsigned blkSize; - /** The associativity of the primary table. */ - unsigned assoc; - /** The number of cycles for each hash lookup. */ - Cycles hashDelay; - /** The number of cycles to read the data. */ - Cycles hitLatency; - /** The replacement policy. */ - Repl *rp; - /** The subblock size in bytes. */ - unsigned subblockSize; - }; - - /** - * Construct and initialize this tag store. - * @param params The IIC parameters. - * @todo - * Should make a way to have less tags in the primary than blks in the - * cache. Also should be able to specify number of secondary blks. - */ - IIC(Params ¶ms); - - /** - * Destructor. - */ - virtual ~IIC(); - - /** - * Register the statistics. - * @param name The name to prepend to the statistic descriptions. - */ - void regStats(const std::string &name); - - /** - * Regenerate the block address from the tag. - * @param tag The tag of the block. - * @param set Not needed for the iic. - * @return The block address. - */ - Addr regenerateBlkAddr(Addr tag, int set) { - return (((Addr)tag << tagShift)); - } - - /** - * Return the block size. - * @return The block size. - */ - unsigned - getBlockSize() const - { - return blkSize; - } - - /** - * Return the subblock size. - * @return The subblock size. - */ - unsigned - getSubBlockSize() const - { - return subSize; - } - - /** - * Return the hit latency. - * @return the hit latency. - */ - int getHitLatency() const - { - return hitLatency; - } - - /** - * Generate the tag from the address. - * @param addr The address to a get a tag for. - * @return the tag. - */ - Addr extractTag(Addr addr) const - { - return (addr >> tagShift); - } - - /** - * Return the set, always 0 for IIC. - * @return 0. - */ - int extractSet(Addr addr) const - { - return 0; - } - - /** - * Get the block offset of an address. - * @param addr The address to get the offset of. - * @return the block offset of the address. - */ - int extractBlkOffset(Addr addr) const - { - return (addr & blkMask); - } - - /** - * Align an address to the block size. - * @param addr the address to align. - * @return The block address. - */ - Addr blkAlign(Addr addr) const - { - return (addr & ~(Addr)blkMask); - } - - /** - * Swap the position of two tags. - * @param index1 The first tag location. - * @param index2 The second tag location. - */ - void tagSwap(unsigned long index1, unsigned long index2); - - /** - * Clear the reference bit of the tag and return its old value. - * @param index The pointer of the tag to manipulate. - * @return The previous state of the reference bit. - */ - bool clearRef(unsigned long index) - { - bool tmp = tagStore[index].isReferenced(); - tagStore[index].status &= ~BlkReferenced; - return tmp; - } - - /** - * Invalidate a block. - * @param blk The block to invalidate. - */ - void invalidate(BlkType *blk); - - /** - * Access block and update replacement data. May not succeed, in which case - * NULL pointer is returned. This has all the implications of a cache - * access and should only be used as such. - * Returns the access latency and inCache flags as a side effect. - * @param addr The address to find. - * @param asid The address space ID. - * @param lat The access latency. - * @return A pointer to the block found, if any. - */ - IICTag* accessBlock(Addr addr, Cycles &lat, int context_src); - - /** - * Find the block, do not update the replacement data. - * @param addr The address to find. - * @param asid The address space ID. - * @return A pointer to the block found, if any. - */ - IICTag* findBlock(Addr addr) const; - - /** - * Find a replacement block for the address provided. - * @param pkt The request to a find a replacement candidate for. - * @param writebacks List for any writebacks to be performed. - * @return The block to place the replacement in. - */ - IICTag* findVictim(Addr addr, PacketList &writebacks); - - void insertBlock(Addr addr, BlkType *blk, int context_src); - /** - *iterated through all blocks and clear all locks - *Needed to clear all lock tracking at once - */ - virtual void clearLocks(); - - /** - * Called at end of simulation to complete average block reference stats. - */ - virtual void cleanupRefs(); - - /** - * Visit each block in the tag store and apply a visitor to the - * block. - * - * The visitor should be a function (or object that behaves like a - * function) that takes a cache block reference as its parameter - * and returns a bool. A visitor can request the traversal to be - * stopped by returning false, returning true causes it to be - * called for the next block in the tag store. - * - * \param visitor Visitor to call on each block. - */ - template <typename V> - void forEachBlk(V &visitor) { - for (unsigned i = 0; i < numTags; ++i) { - if (!visitor(tagStore[i])) - return; - } - } - -private: - /** - * Return the hash of the address. - * @param addr The address to hash. - * @return the hash of the address. - */ - unsigned hash(Addr addr) const; - - /** - * Search for a block in the secondary tag store. Returns the number of - * hash lookups as a side effect. - * @param asid The address space ID. - * @param tag The tag to match. - * @param chain_ptr The first entry to search. - * @param depth The number of hash lookups made while searching. - * @return A pointer to the block if found. - */ - IICTag *secondaryChain(Addr tag, unsigned long chain_ptr, - int *depth) const; - - /** - * Free the resources associated with the next replacement block. - * @param writebacks A list of any writebacks to perform. - */ - void freeReplacementBlock(PacketList & writebacks); - - /** - * Return the pointer to a free data block. - * @param writebacks A list of any writebacks to perform. - * @return A pointer to a free data block. - */ - unsigned long getFreeDataBlock(PacketList & writebacks); - - /** - * Get a free tag in the given hash set. - * @param set The hash set to search. - * @param writebacks A list of any writebacks to perform. - * @return a pointer to a free tag. - */ - IICTag* getFreeTag(int set, PacketList & writebacks); - - /** - * Free the resources associated with the given tag. - * @param tag_ptr The tag to free. - */ - void freeTag(IICTag *tag_ptr); - - /** - * Mark the given data block as being available. - * @param data_ptr The data block to free. - */ - void freeDataBlock(unsigned long data_ptr); - -}; -#endif // __IIC_HH__ - diff --git a/src/mem/cache/tags/iic_repl/Repl.py b/src/mem/cache/tags/iic_repl/Repl.py deleted file mode 100644 index 577eb8fed..000000000 --- a/src/mem/cache/tags/iic_repl/Repl.py +++ /dev/null @@ -1,41 +0,0 @@ -# Copyright (c) 2005-2008 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: Nathan Binkert - -from m5.SimObject import SimObject -from m5.params import * -class Repl(SimObject): - type = 'Repl' - abstract = True - cxx_header = "mem/cache/tags/iic_repl/repl.hh" - -class GenRepl(Repl): - type = 'GenRepl' - cxx_header = "mem/cache/tags/iic_repl/gen.hh" - fresh_res = Param.Int("Fresh pool residency time") - num_pools = Param.Int("Number of priority pools") - pool_res = Param.Int("Pool residency time") diff --git a/src/mem/cache/tags/iic_repl/gen.cc b/src/mem/cache/tags/iic_repl/gen.cc deleted file mode 100644 index 3212b74ab..000000000 --- a/src/mem/cache/tags/iic_repl/gen.cc +++ /dev/null @@ -1,207 +0,0 @@ -/* - * Copyright (c) 2002-2005 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: Erik Hallnor - * Steve Reinhardt - */ - -/** - * @file - * Definitions of the Generational replacement policy. - */ - -#include <string> - -#include "base/misc.hh" -#include "base/types.hh" -#include "mem/cache/tags/iic_repl/gen.hh" -#include "mem/cache/tags/iic.hh" -#include "params/GenRepl.hh" - -using namespace std; - -GenRepl::GenRepl(const Params *p) // fix this, should be set by cache - : Repl(p), num_pools(p->num_pools), fresh_res(p->fresh_res), - pool_res(p->pool_res), num_entries(0), num_pool_entries(0), misses(0), - pools(new GenPool[num_pools+1]) -{ -} - -GenRepl::~GenRepl() -{ - delete [] pools; -} - -unsigned long -GenRepl::getRepl() -{ - unsigned long tmp; - GenReplEntry *re; - int i; - int num_seen = 0; - if (!(num_pool_entries>0)) { - fatal("No blks available to replace"); - } - num_entries--; - num_pool_entries--; - for (i = 0; i < num_pools; i++) { - while ((re = pools[i].pop())) { - num_seen++; - // Remove invalidated entries - if (!re->valid) { - delete re; - continue; - } - if (iic->clearRef(re->tag_ptr)) { - pools[(((i+1)== num_pools)? i :i+1)].push(re, misses); - } - else { - tmp = re->tag_ptr; - delete re; - - repl_pool.sample(i); - - return tmp; - } - } - } - fatal("No replacement found"); - return 0xffffffff; -} - -void -GenRepl::doAdvance(std::list<unsigned long> &demoted) -{ - int i; - int num_seen = 0; - GenReplEntry *re; - misses++; - for (i=0; i<num_pools; i++) { - while (misses-pools[i].oldest > pool_res && (re = pools[i].pop())!=NULL) { - if (iic->clearRef(re->tag_ptr)) { - pools[(((i+1)== num_pools)? i :i+1)].push(re, misses); - /** @todo Not really demoted, but use it for now. */ - demoted.push_back(re->tag_ptr); - advance_pool.sample(i); - } - else { - pools[(((i-1)<0)?i:i-1)].push(re, misses); - demoted.push_back(re->tag_ptr); - demote_pool.sample(i); - } - } - num_seen += pools[i].size; - } - while (misses-pools[num_pools].oldest > fresh_res - && (re = pools[num_pools].pop())!=NULL) { - num_pool_entries++; - if (iic->clearRef(re->tag_ptr)) { - pools[num_pools/2].push(re, misses); - /** @todo Not really demoted, but use it for now. */ - demoted.push_back(re->tag_ptr); - advance_pool.sample(num_pools); - } - else { - pools[num_pools/2-1].push(re, misses); - demoted.push_back(re->tag_ptr); - demote_pool.sample(num_pools); - } - } -} - -void* -GenRepl::add(unsigned long tag_index) -{ - GenReplEntry *re = new GenReplEntry; - re->tag_ptr = tag_index; - re->valid = true; - pools[num_pools].push(re, misses); - num_entries++; - return (void*)re; -} - -void -GenRepl::regStatsWithSuffix(const string name) -{ - using namespace Stats; - - /** GEN statistics */ - repl_pool - .init(0, 16, 1) - .name(name + ".repl_pool_dist") - .desc("Dist. of Repl. across pools") - .flags(pdf) - ; - - advance_pool - .init(0, 16, 1) - .name(name + ".advance_pool_dist") - .desc("Dist. of Repl. across pools") - .flags(pdf) - ; - - demote_pool - .init(0, 16, 1) - .name(name + ".demote_pool_dist") - .desc("Dist. of Repl. across pools") - .flags(pdf) - ; -} - -int -GenRepl::fixTag(void* _re, unsigned long old_index, unsigned long new_index) -{ - GenReplEntry *re = (GenReplEntry*)_re; - assert(re->valid); - if (re->tag_ptr == old_index) { - re->tag_ptr = new_index; - return 1; - } - fatal("Repl entry: tag ptrs do not match"); - return 0; -} - -bool -GenRepl::findTagPtr(unsigned long index) -{ - for (int i = 0; i < num_pools + 1; ++i) { - list<GenReplEntry*>::const_iterator iter = pools[i].entries.begin(); - list<GenReplEntry*>::const_iterator end = pools[i].entries.end(); - for (; iter != end; ++iter) { - if ((*iter)->valid && (*iter)->tag_ptr == index) { - return true; - } - } - } - return false; -} - -GenRepl * -GenReplParams::create() -{ - return new GenRepl(this); -} diff --git a/src/mem/cache/tags/iic_repl/gen.hh b/src/mem/cache/tags/iic_repl/gen.hh deleted file mode 100644 index 2e817d847..000000000 --- a/src/mem/cache/tags/iic_repl/gen.hh +++ /dev/null @@ -1,234 +0,0 @@ -/* - * Copyright (c) 2002-2005 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: Erik Hallnor - */ - -/** - * @file - * Declarations of generational replacement policy - */ - -#ifndef ___GEN_HH__ -#define __GEN_HH__ - -#include <list> - -#include "base/statistics.hh" -#include "mem/cache/tags/iic_repl/repl.hh" -#include "params/GenRepl.hh" - -/** - * Generational Replacement entry. - */ -class GenReplEntry -{ - public: - /** Valid flag, used to quickly invalidate bogus entries. */ - bool valid; - /** The difference between this entry and the previous in the pool. */ - int delta; - /** Pointer to the corresponding tag in the IIC. */ - unsigned long tag_ptr; -}; - -/** - * Generational replacement pool - */ -class GenPool -{ - public: - /** The time the last entry was added. */ - Tick newest; - /** The time the oldest entry was added. */ - Tick oldest; - /** List of the replacement entries in this pool. */ - std::list<GenReplEntry*> entries; - - /** The number of entries in this pool. */ - int size; - - /** - * Simple constructor. - */ - GenPool() { - newest = 0; - oldest = 0; - size = 0; - } - - /** - * Add an entry to this pool. - * @param re The entry to add. - * @param now The current time. - */ - void push(GenReplEntry *re, Tick now) { - ++size; - if (!entries.empty()) { - re->delta = now - newest; - newest = now; - } else { - re->delta = 0; - newest = oldest = now; - } - entries.push_back(re); - } - - /** - * Remove an entry from the pool. - * @return The entry at the front of the list. - */ - GenReplEntry* pop() { - GenReplEntry *tmp = NULL; - if (!entries.empty()) { - --size; - tmp = entries.front(); - entries.pop_front(); - oldest += tmp->delta; - } - return tmp; - } - - /** - * Return the entry at the front of the list. - * @return the entry at the front of the list. - */ - GenReplEntry* top() { - return entries.front(); - } - - /** - * Destructor. - */ - ~GenPool() { - while (!entries.empty()) { - GenReplEntry *tmp = entries.front(); - entries.pop_front(); - delete tmp; - } - } -}; - -/** - * Generational replacement policy for use with the IIC. - * @todo update to use STL and for efficiency - */ -class GenRepl : public Repl -{ - public: - /** The number of pools. */ - int num_pools; - /** The amount of time to stay in the fresh pool. */ - int fresh_res; - /** The amount of time to stay in the normal pools. */ - int pool_res; - /** The maximum number of entries */ - int num_entries; - /** The number of entries currently in the pools. */ - int num_pool_entries; - /** The number of misses. Used as the internal time. */ - Tick misses; - /** The array of pools. */ - GenPool *pools; - - // Statistics - - /** - * @addtogroup CacheStatistics - * @{ - */ - /** The number of replacements from each pool. */ - Stats::Distribution repl_pool; - /** The number of advances out of each pool. */ - Stats::Distribution advance_pool; - /** The number of demotions from each pool. */ - Stats::Distribution demote_pool; - /** - * @} - */ - - typedef GenReplParams Params; - GenRepl(const Params *p); - - /** - * Destructor. - */ - ~GenRepl(); - - /** - * Returns the tag pointer of the cache block to replace. - * @return The tag to replace. - */ - virtual unsigned long getRepl(); - - /** - * Update replacement data - */ - virtual void doAdvance(std::list<unsigned long> &demoted); - - /** - * Add a tag to the replacement policy and return a pointer to the - * replacement entry. - * @param tag_index The tag to add. - * @return The replacement entry. - */ - virtual void* add(unsigned long tag_index); - - /** - * Register statistics. - * @param name The name to prepend to statistic descriptions. - */ - virtual void regStatsWithSuffix(const std::string name); - - /** - * Update the tag pointer to when the tag moves. - * @param re The replacement entry of the tag. - * @param old_index The old tag pointer. - * @param new_index The new tag pointer. - * @return 1 if successful, 0 otherwise. - */ - virtual int fixTag(void *re, unsigned long old_index, - unsigned long new_index); - - /** - * Remove this entry from the replacement policy. - * @param re The replacement entry to remove - */ - virtual void removeEntry(void *re) - { - ((GenReplEntry*)re)->valid = false; - } - - protected: - /** - * Debug function to verify that there is only one repl entry per tag. - * @param index The tag index to check. - */ - bool findTagPtr(unsigned long index); -}; - -#endif /* __GEN_HH__ */ diff --git a/src/mem/cache/tags/iic_repl/repl.hh b/src/mem/cache/tags/iic_repl/repl.hh deleted file mode 100644 index dd25842a0..000000000 --- a/src/mem/cache/tags/iic_repl/repl.hh +++ /dev/null @@ -1,117 +0,0 @@ -/* - * Copyright (c) 2002-2005 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: Erik Hallnor - * Steve Reinhardt - * Nathan Binkert - */ - -/** - * @file - * Declaration of a base replacement policy class. - */ - -#ifndef __REPL_HH__ -#define __REPL_HH__ - -#include <list> -#include <string> - -#include "base/types.hh" -#include "cpu/smt.hh" -#include "sim/sim_object.hh" - -class IIC; - -/** - * A pure virtual base class that defines the interface of a replacement - * policy. - */ -class Repl : public SimObject -{ - public: - /** Pointer to the IIC using this policy. */ - IIC *iic; - - Repl (const Params *params) - : SimObject(params) - { - iic = NULL; - } - - /** - * Set the back pointer to the IIC. - * @param iic_ptr Pointer to the IIC. - */ - void setIIC(IIC *iic_ptr) - { - iic = iic_ptr; - } - - /** - * Returns the tag pointer of the cache block to replace. - * @return The tag to replace. - */ - virtual unsigned long getRepl() = 0; - - /** - * Update replacement data - */ - virtual void doAdvance(std::list<unsigned long> &demoted) = 0; - - /** - * Add a tag to the replacement policy and return a pointer to the - * replacement entry. - * @param tag_index The tag to add. - * @return The replacement entry. - */ - virtual void* add(unsigned long tag_index) = 0; - - /** - * Register statistics. - * @param name The name to prepend to statistic descriptions. - */ - virtual void regStatsWithSuffix(const std::string name) = 0; - - /** - * Update the tag pointer to when the tag moves. - * @param re The replacement entry of the tag. - * @param old_index The old tag pointer. - * @param new_index The new tag pointer. - * @return 1 if successful, 0 otherwise. - */ - virtual int fixTag(void *re, unsigned long old_index, - unsigned long new_index) = 0; - - /** - * Remove this entry from the replacement policy. - * @param re The replacement entry to remove - */ - virtual void removeEntry(void *re) = 0; -}; - -#endif /* SMT_REPL_HH */ diff --git a/src/mem/config/cache.hh b/src/mem/config/cache.hh index 946ed444f..0b7839410 100644 --- a/src/mem/config/cache.hh +++ b/src/mem/config/cache.hh @@ -36,4 +36,4 @@ */ #define USE_CACHE_LRU 1 #define USE_CACHE_FALRU 1 -#define USE_CACHE_IIC 1 + |