diff options
Diffstat (limited to 'src/mem/cache')
| -rw-r--r-- | src/mem/cache/cache_impl.hh | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/src/mem/cache/cache_impl.hh b/src/mem/cache/cache_impl.hh index 115e7aeb8..cb02f7558 100644 --- a/src/mem/cache/cache_impl.hh +++ b/src/mem/cache/cache_impl.hh @@ -1197,6 +1197,15 @@ Cache<TagStore>::recvTimingResp(PacketPtr pkt) if (wasFull && !mq->isFull()) { clearBlocked((BlockedCause)mq->index); } + + // Request the bus for a prefetch if this deallocation freed enough + // MSHRs for a prefetch to take place + if (prefetcher && mq == &mshrQueue && mshrQueue.canPrefetch()) { + Tick next_pf_time = std::max(prefetcher->nextPrefetchReadyTime(), + curTick()); + if (next_pf_time != MaxTick) + requestMemSideBus(Request_PF, next_pf_time); + } } // copy writebacks to write buffer @@ -1955,7 +1964,9 @@ Cache<TagStore>::nextMSHRReadyTime() const Tick nextReady = std::min(mshrQueue.nextMSHRReadyTime(), writeBuffer.nextMSHRReadyTime()); - if (prefetcher) { + // Don't signal prefetch ready time if no MSHRs available + // Will signal once enoguh MSHRs are deallocated + if (prefetcher && mshrQueue.canPrefetch()) { nextReady = std::min(nextReady, prefetcher->nextPrefetchReadyTime()); } |