83 lines
2.7 KiB
C++
83 lines
2.7 KiB
C++
/*
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* Copyright (c) 2005 The Regents of The University of Michigan
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met: redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer;
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* redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution;
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* neither the name of the copyright holders nor the names of its
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* contributors may be used to endorse or promote products derived from
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* this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* Authors: Ron Dreslinski
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*/
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/**
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* @file
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* Describes a strided prefetcher.
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*/
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#ifndef __MEM_CACHE_PREFETCH_STRIDE_PREFETCHER_HH__
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#define __MEM_CACHE_PREFETCH_STRIDE_PREFETCHER_HH__
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#include "mem/cache/prefetch/base.hh"
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class StridePrefetcher : public BasePrefetcher
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{
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protected:
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class strideEntry
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{
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public:
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Addr IAddr;
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Addr MAddr;
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int stride;
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int64_t confidence;
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/* bool operator < (strideEntry a,strideEntry b)
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{
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if (a.confidence == b.confidence) {
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return true; //??????
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}
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else return a.confidence < b.confidence;
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}*/
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};
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Addr* lastMissAddr[64/*MAX_CPUS*/];
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std::list<strideEntry*> table[64/*MAX_CPUS*/];
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Tick latency;
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int degree;
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bool useCPUId;
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public:
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StridePrefetcher(const BaseCacheParams *p)
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: BasePrefetcher(p), latency(p->prefetch_latency),
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degree(p->prefetch_degree), useCPUId(p->prefetch_use_cpu_id)
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{
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}
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~StridePrefetcher() {}
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void calculatePrefetch(PacketPtr &pkt, std::list<Addr> &addresses,
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std::list<Tick> &delays);
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};
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#endif // __MEM_CACHE_PREFETCH_STRIDE_PREFETCHER_HH__
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