Fix several bugs pertaining to upgrades/mem leaks.

src/mem/cache/base_cache.cc:
    Fix a bug about not having a request to send
src/mem/cache/base_cache.hh:
    Fix a bug with the blocking code
src/mem/cache/cache.hh:
    AFix a bug with snoop hits in WB buffer
src/mem/cache/cache_impl.hh:
    Fix a bug with snoop hits in WB buffer
    Also, add better DPRINTF's
src/mem/cache/miss/miss_queue.cc:
    Fix a bug with upgrades (Need to clean it up later)
src/mem/cache/miss/mshr.cc:
    Fix a memory leak bug, still some outstanding with writebacks not being deleted
src/mem/cache/miss/mshr_queue.cc:
    Fix a bug about upgrades (need to clean up later)
src/mem/packet.hh:
    Fix for newly added cmd attribute for upgrades
tests/configs/memtest.py:
    More interesting testcase

--HG--
extra : convert_revision : fcb4f17dd58b537bb4f67a8c835f50e455e8c688

1 files changed, 15 insertions, 0 deletions

diff --git a/src/mem/cache/base_cache.cc b/src/mem/cache/base_cache.cc
index 8e2f4d233..c4d42c0a4 100644
--- a/src/mem/cache/base_cache.cc
+++ b/src/mem/cache/base_cache.cc
@@ -104,10 +104,12 @@ BaseCache::CachePort::recvRetry()
             if (result)
                 drainList.pop_front();
         }
+        if (!result) return;
     }
 
     if (!isCpuSide)
     {
+        if (!cache->doMasterRequest()) return;
         pkt = cache->getPacket();
         MSHR* mshr = (MSHR*)pkt->senderState;
         bool success = sendTiming(pkt);
@@ -179,10 +181,23 @@ BaseCache::CacheEvent::CacheEvent(CachePort *_cachePort, Packet *_pkt)
 void
 BaseCache::CacheEvent::process()
 {
+    if (!cachePort->drainList.empty()) {
+        //We have some responses to drain first
+        bool result = true;
+        while (result && !cachePort->drainList.empty()) {
+            result = cachePort->sendTiming(cachePort->drainList.front());
+            if (result)
+                cachePort->drainList.pop_front();
+        }
+        if (!result) return;
+    }
+
     if (!pkt)
     {
         if (!cachePort->isCpuSide)
         {
+            //For now, doMasterRequest somehow is still getting set
+            if (!cachePort->cache->doMasterRequest()) return;
             //MSHR
             pkt = cachePort->cache->getPacket();
             MSHR* mshr = (MSHR*) pkt->senderState;