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Writebacks can be pulled out from under the BusRequest when snoops of uprgades to owned blocks hit in the WB buffer

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--HG--
extra : convert_revision : f0502836a79ce303150daa7e571badb0bce3a97a
This commit is contained in:
Ron Dreslinski 2006-10-11 00:13:53 -04:00
parent c9102b08fa
commit 23bbd14426
1 changed files with 14 additions and 4 deletions
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18
src/mem/cache/base_cache.cc vendored
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@ -135,7 +135,12 @@ BaseCache::CachePort::recvRetry()
else if (!isCpuSide)
{
DPRINTF(CachePort, "%s attempting to send a retry for MSHR\n", name());
assert(cache->doMasterRequest());
if (cache->doMasterRequest()) {
//This can happen if I am the owner of a block and see an upgrade
//while the block was in my WB Buffers. I just remove the
//wb and de-assert the masterRequest
return;
}
pkt = cache->getPacket();
MSHR* mshr = (MSHR*)pkt->senderState;
bool success = sendTiming(pkt);
@ -236,10 +241,15 @@ BaseCache::CacheEvent::process()
}
}
else if (!cachePort->isCpuSide)
{
{ //MSHR
DPRINTF(CachePort, "%s trying to send a MSHR request\n", cachePort->name());
assert(cachePort->cache->doMasterRequest());
//MSHR
if (cachePort->cache->doMasterRequest()) {
//This can happen if I am the owner of a block and see an upgrade
//while the block was in my WB Buffers. I just remove the
//wb and de-assert the masterRequest
return;
}
pkt = cachePort->cache->getPacket();
MSHR* mshr = (MSHR*) pkt->senderState;
bool success = cachePort->sendTiming(pkt);