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Fix CSHR retrys

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--HG--
extra : convert_revision : caa7664f6c945396fa38ce62fbda018ebed4eaa6
This commit is contained in:
Ron Dreslinski 2006-10-12 15:02:56 -04:00
parent 4a96779350
commit eddbb6801f
1 changed files with 20 additions and 12 deletions
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32
src/mem/cache/base_cache.cc vendored
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@ -189,7 +189,6 @@ BaseCache::CachePort::recvRetry()
{ {
DPRINTF(CachePort, "%s has more requests\n", name()); DPRINTF(CachePort, "%s has more requests\n", name());
//Still more to issue, rerequest in 1 cycle //Still more to issue, rerequest in 1 cycle
pkt = NULL;
BaseCache::CacheEvent * reqCpu = new BaseCache::CacheEvent(this); BaseCache::CacheEvent * reqCpu = new BaseCache::CacheEvent(this);
reqCpu->schedule(curTick + 1); reqCpu->schedule(curTick + 1);
} }
@ -202,12 +201,13 @@ BaseCache::CachePort::recvRetry()
pkt = cshrRetry; pkt = cshrRetry;
bool success = sendTiming(pkt); bool success = sendTiming(pkt);
waitingOnRetry = !success; waitingOnRetry = !success;
if (success && cache->doSlaveRequest()) if (success)
{ {
//Still more to issue, rerequest in 1 cycle if (cache->doSlaveRequest()) {
pkt = NULL; //Still more to issue, rerequest in 1 cycle
BaseCache::CacheEvent * reqCpu = new BaseCache::CacheEvent(this); BaseCache::CacheEvent * reqCpu = new BaseCache::CacheEvent(this);
reqCpu->schedule(curTick + 1); reqCpu->schedule(curTick + 1);
}
cshrRetry = NULL; cshrRetry = NULL;
} }
} }
@ -305,20 +305,28 @@ BaseCache::CacheEvent::process()
} }
else else
{ {
assert(cachePort->cache->doSlaveRequest());
//CSHR //CSHR
pkt = cachePort->cache->getCoherencePacket(); if (!cachePort->cshrRetry) {
assert(cachePort->cache->doSlaveRequest());
pkt = cachePort->cache->getCoherencePacket();
}
else {
pkt = cachePort->cshrRetry;
}
bool success = cachePort->sendTiming(pkt); bool success = cachePort->sendTiming(pkt);
if (!success) { if (!success) {
//Need to send on a retry //Need to send on a retry
cachePort->cshrRetry = pkt; cachePort->cshrRetry = pkt;
cachePort->waitingOnRetry = true; cachePort->waitingOnRetry = true;
} }
else if (cachePort->cache->doSlaveRequest()) else
{ {
//Still more to issue, rerequest in 1 cycle cachePort->cshrRetry = NULL;
pkt = NULL; if (cachePort->cache->doSlaveRequest()) {
this->schedule(curTick+1); //Still more to issue, rerequest in 1 cycle
pkt = NULL;
this->schedule(curTick+1);
}
} }
} }
return; return;