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Diffstat (limited to 'src/mem/cache/tags/split.hh')
| -rw-r--r-- | src/mem/cache/tags/split.hh | 308 |
1 files changed, 0 insertions, 308 deletions
diff --git a/src/mem/cache/tags/split.hh b/src/mem/cache/tags/split.hh deleted file mode 100644 index e8954f791..000000000 --- a/src/mem/cache/tags/split.hh +++ /dev/null @@ -1,308 +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 - * Declaration of a split/partitioned tag store. - */ - -#ifndef __SPLIT_HH__ -#define __SPLIT_HH__ - -#include <cstring> -#include <list> - -#include "mem/cache/blk.hh" // base class -#include "mem/cache/tags/split_blk.hh" -#include "mem/packet.hh" // for inlined functions -#include <assert.h> -#include "mem/cache/tags/base.hh" -#include "base/hashmap.hh" - -class BaseCache; -class SplitLRU; -class SplitLIFO; - -/** - * A cache tag store. - */ -class Split : public BaseTags -{ - public: - /** Typedef the block type used in this tag store. */ - typedef SplitBlk BlkType; - /** Typedef for a list of pointers to the local block class. */ - typedef std::list<SplitBlk*> BlkList; - protected: - /** The number of sets in the cache. */ - const int numSets; - /** The number of bytes in a block. */ - const int blkSize; - /** Whether the 2nd partition (for the nic) is LIFO or not */ - const bool lifo; - /** The hit latency. */ - const int hitLatency; - - Addr blkMask; - - /** Number of NIC requests that hit in the NIC partition */ - Stats::Scalar<> NR_NP_hits; - /** Number of NIC requests that hit in the CPU partition */ - Stats::Scalar<> NR_CP_hits; - /** Number of CPU requests that hit in the NIC partition */ - Stats::Scalar<> CR_NP_hits; - /** Number of CPU requests that hit in the CPU partition */ - Stats::Scalar<> CR_CP_hits; - /** The number of nic replacements (i.e. misses) */ - Stats::Scalar<> nic_repl; - /** The number of cpu replacements (i.e. misses) */ - Stats::Scalar<> cpu_repl; - - //For latency studies - /** the number of NIC blks that were used before evicted */ - Stats::Scalar<> nicUsedWhenEvicted; - /** the total latency of used NIC blocks in the cache */ - Stats::Scalar<> nicUsedTotLatency; - /** the total number of used NIC blocks evicted */ - Stats::Scalar<> nicUsedTotEvicted; - /** the average number of cycles a used NIC blk is in the cache */ - Stats::Formula nicUsedAvgLatency; - /** the Distribution of used NIC blk eviction times */ - Stats::Distribution<> usedEvictDist; - - /** the number of NIC blks that were unused before evicted */ - Stats::Scalar<> nicUnusedWhenEvicted; - /** the total latency of unused NIC blks in the cache */ - Stats::Scalar<> nicUnusedTotLatency; - /** the total number of unused NIC blocks evicted */ - Stats::Scalar<> nicUnusedTotEvicted; - /** the average number of cycles an unused NIC blk is in the cache */ - Stats::Formula nicUnusedAvgLatency; - /** the Distribution of unused NIC blk eviction times */ - Stats::Distribution<> unusedEvictDist; - - /** The total latency of NIC blocks to 1st usage time by CPU */ - Stats::Scalar<> nicUseByCPUCycleTotal; - /** The total number of NIC blocks used */ - Stats::Scalar<> nicBlksUsedByCPU; - /** the average number of cycles before a NIC blk that is used gets used by CPU */ - Stats::Formula nicAvgUsageByCPULatency; - /** the Distribution of cycles time before a NIC blk is used by CPU*/ - Stats::Distribution<> useByCPUCycleDist; - - /** the number of CPU blks that were used before evicted */ - Stats::Scalar<> cpuUsedBlks; - /** the number of CPU blks that were unused before evicted */ - Stats::Scalar<> cpuUnusedBlks; - - /** the avg number of cycles before a NIC blk is evicted */ - Stats::Formula nicAvgLatency; - - typedef m5::hash_map<Addr, int, m5::hash<Addr> > hash_t; - typedef hash_t::const_iterator memIter; - hash_t memHash; - - - private: - SplitLRU *lru; - SplitLRU *lru_net; - SplitLIFO *lifo_net; - - public: - /** - * Construct and initialize this tag store. - * @param _numSets The number of sets in the cache. - * @param _blkSize The number of bytes in a block. - * @param _assoc The associativity of the cache. - * @param _hit_latency The latency in cycles for a hit. - */ - Split(int _numSets, int _blkSize, int total_ways, int LRU1_assoc, - bool _lifo, bool _two_queue, int _hit_latency); - - /** - * Destructor - */ - virtual ~Split(); - - /** - * Register the stats for this object - * @param name The name to prepend to the stats name. - */ - void regStats(const std::string &name); - - /** - * Return the block size. - * @return the block size. - */ - int getBlockSize() - { - return blkSize; - } - - /** - * Return the subblock size. In the case of Split it is always the block - * size. - * @return The block size. - */ - int getSubBlockSize() - { - return blkSize; - } - - /** - * Search for the address in the cache. - * @param asid The address space ID. - * @param addr The address to find. - * @return True if the address is in the cache. - */ - bool probe(Addr addr) const; - - /** - * Invalidate the given block. - * @param blk The block to invalidate. - */ - void invalidateBlk(BlkType *blk); - - /** - * Finds the given address in the cache and update replacement data. - * Returns the access latency as a side effect. - * @param addr The address to find. - * @param asid The address space ID. - * @param lat The access latency. - * @return Pointer to the cache block if found. - */ - SplitBlk* findBlock(Addr addr, int &lat); - - /** - * Finds the given address in the cache, do not update replacement data. - * @param addr The address to find. - * @param asid The address space ID. - * @return Pointer to the cache block if found. - */ - SplitBlk* 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. - */ - SplitBlk* findReplacement(Addr addr, PacketList &writebacks); - - - /** - * Generate the tag from the given address. - * @param addr The address to get the tag from. - * @return The tag of the address. - */ - Addr extractTag(Addr addr) const; - - /** - * Calculate the set index from the address. - * @param addr The address to get the set from. - * @return The set index of the address. - */ - int extractSet(Addr addr) const - { - panic("should never call this!\n"); - M5_DUMMY_RETURN - } - - /** - * Get the block offset from an address. - * @param addr The address to get the offset of. - * @return The block offset. - */ - 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)); - } - - /** - * Regenerate the block address from the tag. - * @param tag The tag of the block. - * @param set The set of the block. - * @return The block address. - */ - Addr regenerateBlkAddr(Addr tag, int set) const; - - /** - * Return the hit latency. - * @return the hit latency. - */ - int getHitLatency() const - { - return hitLatency; - } - - /** - * Read the data out of the internal storage of the given cache block. - * @param blk The cache block to read. - * @param data The buffer to read the data into. - * @return The cache block's data. - */ - void readData(SplitBlk *blk, uint8_t *data) - { - std::memcpy(data, blk->data, blk->size); - } - - /** - * Write data into the internal storage of the given cache block. Since in - * Split does not store data differently this just needs to update the size. - * @param blk The cache block to write. - * @param data The data to write. - * @param size The number of bytes to write. - * @param writebacks A list for any writebacks to be performed. May be - * needed when writing to a compressed block. - */ - void writeData(SplitBlk *blk, uint8_t *data, int size, - PacketList & writebacks) - { - assert(size <= blkSize); - blk->size = size; - } - - /** - * Called at end of simulation to complete average block reference stats. - */ - virtual void cleanupRefs(); -}; - -#endif |