diff options
Diffstat (limited to 'src/mem/cache/prefetch/ghb_prefetcher.cc')
-rw-r--r-- | src/mem/cache/prefetch/ghb_prefetcher.cc | 42 |
1 files changed, 34 insertions, 8 deletions
diff --git a/src/mem/cache/prefetch/ghb_prefetcher.cc b/src/mem/cache/prefetch/ghb_prefetcher.cc index a6c419113..d7d819a2d 100644 --- a/src/mem/cache/prefetch/ghb_prefetcher.cc +++ b/src/mem/cache/prefetch/ghb_prefetcher.cc @@ -31,18 +31,44 @@ /** * @file - * GHB Prefetcher template instantiations. + * GHB Prefetcher implementation. */ -#include "mem/cache/tags/cache_tags.hh" +#include "mem/cache/prefetch/ghb_prefetcher.hh" +#include "arch/isa_traits.hh" -#include "mem/cache/tags/lru.hh" +void +GHBPrefetcher::calculatePrefetch(PacketPtr &pkt, std::list<Addr> &addresses, + std::list<Tick> &delays) +{ + Addr blkAddr = pkt->getAddr() & ~(Addr)(this->blkSize-1); + int cpuID = pkt->req->getCpuNum(); + if (!useCPUId) cpuID = 0; -#include "mem/cache/prefetch/ghb_prefetcher.hh" -// Template Instantiations -#ifndef DOXYGEN_SHOULD_SKIP_THIS + int new_stride = blkAddr - last_miss_addr[cpuID]; + int old_stride = last_miss_addr[cpuID] - + second_last_miss_addr[cpuID]; -template class GHBPrefetcher<CacheTags<LRU> >; + second_last_miss_addr[cpuID] = last_miss_addr[cpuID]; + last_miss_addr[cpuID] = blkAddr; -#endif //DOXYGEN_SHOULD_SKIP_THIS + if (new_stride == old_stride) { + for (int d=1; d <= degree; d++) { + Addr newAddr = blkAddr + d * new_stride; + if (this->pageStop && + (blkAddr & ~(TheISA::VMPageSize - 1)) != + (newAddr & ~(TheISA::VMPageSize - 1))) + { + //Spanned the page, so now stop + this->pfSpanPage += degree - d + 1; + return; + } + else + { + addresses.push_back(newAddr); + delays.push_back(latency); + } + } + } +} |