65c15ba188
This namespace has gone through the deprecation period and can now be removed. Change-Id: I31953be7ce8566576de94c9296eeeec601c9906a Signed-off-by: Daniel R. Carvalho <odanrc@yahoo.com.br> Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/67353 Reviewed-by: Richard Cooper <richard.cooper@arm.com> Maintainer: Jason Lowe-Power <power.jg@gmail.com> Tested-by: kokoro <noreply+kokoro@google.com>
95 lines
3.2 KiB
C++
95 lines
3.2 KiB
C++
/*
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* Copyright (c) 2014, 2019 ARM Limited
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* All rights reserved
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*
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* The license below extends only to copyright in the software and shall
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* not be construed as granting a license to any other intellectual
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* property including but not limited to intellectual property relating
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* to a hardware implementation of the functionality of the software
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* licensed hereunder. You may use the software subject to the license
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* terms below provided that you ensure that this notice is replicated
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* unmodified and in its entirety in all distributions of the software,
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* modified or unmodified, in source code or in binary form.
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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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#include "mem/cache/prefetch/multi.hh"
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#include "params/MultiPrefetcher.hh"
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namespace gem5
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{
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namespace prefetch
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{
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Multi::Multi(const MultiPrefetcherParams &p)
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: Base(p),
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prefetchers(p.prefetchers.begin(), p.prefetchers.end()),
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lastChosenPf(0)
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{
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}
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void
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Multi::setCache(BaseCache *_cache)
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{
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for (auto pf : prefetchers)
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pf->setCache(_cache);
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}
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Tick
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Multi::nextPrefetchReadyTime() const
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{
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Tick next_ready = MaxTick;
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for (auto pf : prefetchers)
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next_ready = std::min(next_ready, pf->nextPrefetchReadyTime());
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return next_ready;
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}
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PacketPtr
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Multi::getPacket()
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{
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lastChosenPf = (lastChosenPf + 1) % prefetchers.size();
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uint8_t pf_turn = lastChosenPf;
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for (int pf = 0 ; pf < prefetchers.size(); pf++) {
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if (prefetchers[pf_turn]->nextPrefetchReadyTime() <= curTick()) {
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PacketPtr pkt = prefetchers[pf_turn]->getPacket();
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panic_if(!pkt, "Prefetcher is ready but didn't return a packet.");
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prefetchStats.pfIssued++;
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issuedPrefetches++;
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return pkt;
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}
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pf_turn = (pf_turn + 1) % prefetchers.size();
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}
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return nullptr;
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}
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} // namespace prefetch
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} // namespace gem5
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