diff options
Diffstat (limited to 'src/mem/simple_dram.cc')
| -rw-r--r-- | src/mem/simple_dram.cc | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/src/mem/simple_dram.cc b/src/mem/simple_dram.cc index 033ccbb26..0deaedcf9 100644 --- a/src/mem/simple_dram.cc +++ b/src/mem/simple_dram.cc @@ -520,8 +520,9 @@ SimpleDRAM::addToWriteQueue(PacketPtr pkt, unsigned int pktCount) writeBursts++; // see if we can merge with an existing item in the write - // queue and keep track of whether we have merged or not, as - // there is only ever one item to merge with + // queue and keep track of whether we have merged or not so we + // can stop at that point and also avoid enqueueing a new + // request bool merged = false; auto w = writeQueue.begin(); @@ -529,6 +530,9 @@ SimpleDRAM::addToWriteQueue(PacketPtr pkt, unsigned int pktCount) // either of the two could be first, if they are the same // it does not matter which way we go if ((*w)->addr >= addr) { + // the existing one starts after the new one, figure + // out where the new one ends with respect to the + // existing one if ((addr + size) >= ((*w)->addr + (*w)->size)) { // check if the existing one is completely // subsumed in the new one @@ -550,6 +554,9 @@ SimpleDRAM::addToWriteQueue(PacketPtr pkt, unsigned int pktCount) (*w)->size = (*w)->addr + (*w)->size - addr; } } else { + // the new one starts after the current one, figure + // out where the existing one ends with respect to the + // new one if (((*w)->addr + (*w)->size) >= (addr + size)) { // check if the new one is completely subsumed in the // existing one |