bool CommonMigrator::TryMigration( NVMainRequest *request, bool atomic )
{
begin_cycle_ = GetEventQueue()->GetCurrentCycle();
bool rv = true;
//translate this object to NVMain type
if( NVMTypeMatches(NVMain) )
{
/* Ensure the Migrator translator is used. */
//parent module is who issue migration??
Migrator *migratorTranslator = dynamic_cast<Migrator *>(parent->GetTrampoline( )->GetDecoder( ));
assert( migratorTranslator != NULL );
/* Migrations in progress must be served from the buffers during migration. */
if( GetCurrentHookType( ) == NVMHOOK_PREISSUE && migratorTranslator->IsBuffered( request->address ) )
{
/* Short circuit this request so it is not queued. */
rv = false;
/* Complete the request, adding some buffer read latency. */
GetEventQueue( )->InsertEvent( EventResponse, parent->GetTrampoline( ), request,
GetEventQueue()->GetCurrentCycle()+bufferReadLatency );
bufferedReads++;
return rv;
}
/* Don't inject results before the original is issued to prevent deadlock */
if( GetCurrentHookType( ) != NVMHOOK_POSTISSUE )
{
return rv;
}
/* See if any migration is possible (i.e., no migration is in progress) */
bool migrationPossible = false;
if( !migratorTranslator->Migrating( )
&& !migratorTranslator->IsMigrated( request->address )
&& request->address.GetChannel( ) != promotionChannel )
{
migrationPossible = true;
}
if( migrationPossible )
{
assert( !demoBuffered && !promoBuffered );
/*
* Note: once IssueCommand is called, this hook may receive
* a different parent, but fail the NVMTypeMatch check. As a
* result we need to save a pointer to the NVMain class we
* are issuing requests to.
*/
NVMObject *savedParent = parent->GetTrampoline( );
/* Discard the unused column address. */
uint64_t row, bank, rank, channel, subarray;
request->address.GetTranslatedAddress( &row, NULL, &bank, &rank, &channel, &subarray );
uint64_t promoteeAddress = migratorTranslator->ReverseTranslate( row, 0, bank, rank, channel, subarray );
promotee.SetPhysicalAddress( promoteeAddress );
promotee.SetTranslatedAddress( row, 0, bank, rank, channel, subarray );
/* Pick a victim to replace. */
ChooseVictim( migratorTranslator, promotee, demotee );
assert( migratorTranslator->IsMigrated( demotee ) == false );
assert( migratorTranslator->IsMigrated( promotee ) == false );
if( atomic )
{
migratorTranslator->StartMigration( request->address, demotee );
migratorTranslator->SetMigrationState( promotee, MIGRATION_DONE );
migratorTranslator->SetMigrationState( demotee, MIGRATION_DONE );
}
/* Lastly, make sure we can queue the migration requests. */
else if( CheckIssuable( promotee, READ ) &&
CheckIssuable( demotee, READ ) )
{
migratorTranslator->StartMigration( request->address, demotee );
promoRequest = new NVMainRequest( );
demoRequest = new NVMainRequest( );
promoRequest->address = promotee;
promoRequest->type = READ;
promoRequest->tag = MIG_READ_TAG;
promoRequest->burstCount = numCols;
demoRequest->address = demotee;
demoRequest->type = READ;
demoRequest->tag = MIG_READ_TAG;
demoRequest->burstCount = numCols;
promoRequest->owner = savedParent;
demoRequest->owner = savedParent;
savedParent->IssueCommand( promoRequest );
savedParent->IssueCommand( demoRequest );
}
else
{
queueWaits++;
}
}
}
return rv;
}
bool MultiQueueMigrator::TryMigration( NVMainRequest *request, bool atomic )
{
// std::cout<<"\nMultiQueueMigrator::TryMigration ---- addr: "<<std::hex<<request->address.GetPhysicalAddress()<<"\n"<<std::endl;
bool rv = true;
if( NVMTypeMatches(NVMain) )
{
//std::cout<<"migration:"<<std::endl;
/* Ensure the Migrator translator is used. */
MQMigrator *migratorTranslator = dynamic_cast<MQMigrator *>(parent->GetTrampoline( )->GetDecoder( ));
assert( migratorTranslator != NULL );
/* Migrations in progress must be served from the buffers during migration. */
if( GetCurrentHookType( ) == NVMHOOK_PREISSUE && migratorTranslator->IsBuffered( request->address ) )
{
/* Short circuit this request so it is not queued. */
rv = false;
/* Complete the request, adding some buffer read latency. */
GetEventQueue( )->InsertEvent( EventResponse, parent->GetTrampoline( ), request,
GetEventQueue()->GetCurrentCycle()+bufferReadLatency );
bufferedReads++;
return rv;
}
/* Don't inject results before the original is issued to prevent deadlock */
if( GetCurrentHookType( ) != NVMHOOK_POSTISSUE )
{
return rv;
}
currentTime++;
if( !request->address.IsTranslated( ) )
{
uint64_t row, col, bank, rank, channel, subarray;
migratorTranslator->Translate(request, &row, &col,
&bank,&rank, &channel, &subarray);
request->address.SetTranslatedAddress( row, col, bank, rank, channel, subarray);
}
//***********************traces start
uint64_t pageNo = migratorTranslator->GetAddressKey(request->address);
uint64_t channelNo = request->address.GetChannel();
//std::cout<<"request:"<<std::hex<<request->address.GetPhysicalAddress()<<" channel:"<<request->address.GetChannel()<<std::endl;
/*
if (GetEventQueue()->GetCurrentCycle()%trace_interval==0 )
{
for( uint64_t i=0 ; i<channel_num ; i++)
{
file<<migratorTranslator->migrate_access_times[i]<<" ";
origin_file<< migratorTranslator->access_times[i]<<" ";
}
file<<std::endl;
origin_file<<std::endl;
}*/
//***********************traces end
//this request is issued to access dram memory
if( channelNo == promotionChannel && !IsInList(DRAMPageList, pageNo) )
{
DRAMPageList.push_back(pageNo);
}
//get ranking queue num for the request
int location = LocateQueue(pageNo);
if( location == -1 )
{
PageType page = { pageNo, 1, currentTime + LIFE_TIME, channelNo };
//insert the request to queue[0] (LRU)
JoinQueue(page);
}
else
{
AccessPage(location, pageNo);
}
Display();
/* See if any migration is possible (i.e., no migration is in progress) */
bool migrationPossible = false;
if( !migratorTranslator->Migrating( )
&& !migratorTranslator->IsMigrated( request->address )
&& channelNo != promotionChannel )
{
migrationPossible = true;
}
else if(migratorTranslator->Migrating( ))
{
//std::cout<<"\nPossible? ------ No ------ 1\n"<<std::endl;
}
else if(migratorTranslator->IsMigrated( request->address ))
{
//std::cout<<"\nPossible? ------ No ------ 2\n"<<std::endl;
}
else if(channelNo == promotionChannel)
{
//std::cout<<"\nPossible? ------ No ------ 3\n"<<std::endl;
}
//std::cout<<"migration possible:"<<migrationPossible<<std::endl;
if( migrationPossible )
{
//std::cout<<"\n Possible? ---- Yes!\n"<<std::endl;
assert( !demoBuffered && !promoBuffered );
//std::cout<<"location is:"<<location<<std::endl;
if( location == THRESHOLD_QUEUE && !migratorTranslator->IsMigrated( request->address ))
{
//std::cout<<"\n Migrate? ---- Yes!\n"<<std::endl;
/*
* Note: once IssueCommand is called, this hook may receive
* a different parent, but fail the NVMTypeMatch check. As a
* result we need to save a pointer to the NVMain class we
* are issuing requests to.
*/
NVMObject *savedParent = parent->GetTrampoline( );
//NVMObject *savedParent = main_mem;
/* Discard the unused column address. */
uint64_t row, bank, rank, channel, subarray;
request->address.GetTranslatedAddress( &row, NULL, &bank, &rank, &channel, &subarray );
uint64_t promoteeAddress = migratorTranslator->ReverseTranslate( row, 0, bank, rank, channel, subarray );
promotee.SetPhysicalAddress( promoteeAddress );
promotee.SetTranslatedAddress( row, 0, bank, rank, channel, subarray );
/* Pick a victim to replace. */
ChooseVictim( migratorTranslator, promotee, demotee );
assert( migratorTranslator->IsMigrated( demotee ) == false );
assert( migratorTranslator->IsMigrated( promotee ) == false );
if( atomic )
{
migratorTranslator->StartMigration( request->address, demotee );
migratorTranslator->SetMigrationState( promotee, MQ_MIGRATION_DONE );
migratorTranslator->SetMigrationState( demotee, MQ_MIGRATION_DONE );
}
/* Lastly, make sure we can queue the migration requests. */
else if( CheckIssuable( promotee, READ ) &&
CheckIssuable( demotee, READ ) )
{
migratorTranslator->StartMigration( request->address, demotee );
promoRequest = new NVMainRequest( );
demoRequest = new NVMainRequest( );
promoRequest->address = promotee;
promoRequest->type = READ;
promoRequest->tag = MIG_READ_TAG;
promoRequest->burstCount = numCols;
demoRequest->address = demotee;
demoRequest->type = READ;
demoRequest->tag = MIG_READ_TAG;
demoRequest->burstCount = numCols;
promoRequest->owner = savedParent;
demoRequest->owner = savedParent;
savedParent->IssueCommand( promoRequest );
savedParent->IssueCommand( demoRequest );
}
else
{
queueWaits++;
}
}
}
CheckQueue();
}
return rv;
}
