void MESIProtocol::writeMissHandler(SMPMemRequest *sreq)
{
PAddr addr = sreq->getPAddr();
Line *l = pCache->getLine(addr);
#ifdef TLS
if (l && sreq->isDataReq())
{
tls::Epoch* eph= sreq->getOriginalRequest()->getEpoch();
//This ensures that MESI protocol dosent locate a line in
//this cache if epochs are incorrect
if ((l->getEpoch())->getClock() < eph->getClock()){}
else
l=0;
}
sendWriteMissAck(sreq);
#else
if(l && !l->isLocked()) {
combineResponses(sreq, (MESIState_t) l->getState());
pCache->invalidateLine(addr, sendWriteMissAckCB::create(this, sreq));
return;
} else {
sendWriteMissAck(sreq);
}
#endif
//sendData(sreq);
}
void MESIProtocol::invalidateHandlerTLS(SMPMemRequest *sreq)
{
PAddr addr = sreq->getPAddr();
Line *l = pCache->getLine(addr);
//if(l && !l->isLocked()) {
combineResponses(sreq, (MESIState_t) l->getState());
pCache->invalidateLine(addr, dummy1CB::create(this,sreq->getOriginalRequest()));
return;
//}
}
void MESIProtocol::invalidateHandler(SMPMemRequest *sreq)
{
PAddr addr = sreq->getPAddr();
Line *l = pCache->getLine(addr);
if(l && !l->isLocked()) {
combineResponses(sreq, (MESIState_t) l->getState());
pCache->invalidateLine(addr, sendInvalidateAckCB::create(this, sreq));
return;
} else {
sendInvalidateAck(sreq);
}
}
void MESIProtocol::readMissHandler(SMPMemRequest *sreq)
{
PAddr addr = sreq->getPAddr();
Line *l = pCache->getLine(addr);
#ifdef TLS
if (l && sreq->isDataReq())
{
tls::Epoch* eph= sreq->getOriginalRequest()->getEpoch();
//This ensures that MESI protocol dosent locate a line in
//this cache if epochs are incorrect
if ((l->getEpoch())->getClock() < eph->getClock()){}
else
l=0;
}
#endif
if(l && !l->isLocked()) {
combineResponses(sreq, (MESIState_t) l->getState());
changeState(l, MESI_SHARED);
}
sendReadMissAck(sreq);
//sendData(sreq);
}
/**
* The core config write functionality.
*
* Config writes run in two passes - the first is a quick check to ensure the config servers
* are all reachable, the second runs the actual write.
*
* TODO: Upgrade and move this logic to the config servers, a state machine implementation
* is probably the next step.
*/
void ConfigCoordinator::executeBatch( const BatchedCommandRequest& clientRequest,
BatchedCommandResponse* clientResponse,
bool fsyncCheck ) {
NamespaceString nss( clientRequest.getNS() );
dassert( nss.db() == "config" || nss.db() == "admin" );
dassert( clientRequest.sizeWriteOps() == 1u );
if ( fsyncCheck ) {
//
// Sanity check that all configs are still reachable using fsync, preserving legacy
// behavior
//
OwnedPointerVector<ConfigFsyncResponse> fsyncResponsesOwned;
vector<ConfigFsyncResponse*>& fsyncResponses = fsyncResponsesOwned.mutableVector();
//
// Send side
//
for ( vector<ConnectionString>::iterator it = _configHosts.begin();
it != _configHosts.end(); ++it ) {
ConnectionString& configHost = *it;
FsyncRequest fsyncRequest;
_dispatcher->addCommand( configHost, "admin", fsyncRequest );
}
_dispatcher->sendAll();
//
// Recv side
//
bool fsyncError = false;
while ( _dispatcher->numPending() > 0 ) {
fsyncResponses.push_back( new ConfigFsyncResponse() );
ConfigFsyncResponse& fsyncResponse = *fsyncResponses.back();
Status dispatchStatus = _dispatcher->recvAny( &fsyncResponse.configHost,
&fsyncResponse.response );
// We've got to recv everything, no matter what
if ( !dispatchStatus.isOK() ) {
fsyncError = true;
buildFsyncErrorFrom( dispatchStatus, &fsyncResponse.response );
}
else if ( !fsyncResponse.response.getOk() ) {
fsyncError = true;
}
}
if ( fsyncError ) {
combineFsyncErrors( fsyncResponses, clientResponse );
return;
}
else {
fsyncResponsesOwned.clear();
}
}
//
// Do the actual writes
//
BatchedCommandRequest configRequest( clientRequest.getBatchType() );
clientRequest.cloneTo( &configRequest );
configRequest.setNS( nss.coll() );
OwnedPointerVector<ConfigResponse> responsesOwned;
vector<ConfigResponse*>& responses = responsesOwned.mutableVector();
//
// Send the actual config writes
//
// Get as many batches as we can at once
for ( vector<ConnectionString>::iterator it = _configHosts.begin();
it != _configHosts.end(); ++it ) {
ConnectionString& configHost = *it;
_dispatcher->addCommand( configHost, nss.db(), configRequest );
}
// Send them all out
_dispatcher->sendAll();
//
// Recv side
//
while ( _dispatcher->numPending() > 0 ) {
// Get the response
responses.push_back( new ConfigResponse() );
ConfigResponse& configResponse = *responses.back();
Status dispatchStatus = _dispatcher->recvAny( &configResponse.configHost,
&configResponse.response );
if ( !dispatchStatus.isOK() ) {
buildErrorFrom( dispatchStatus, &configResponse.response );
}
}
combineResponses( responses, clientResponse );
}