void TrafficManager::_Step( )
{
Flit *f;
Credit *cred;
// Inject traffic
if ( _voqing ) {
_VOQInject( );
} else {
_ClassInject( );
}
// Advance network
_net->ReadInputs( );
_partial_internal_cycles += _internal_speedup;
while ( _partial_internal_cycles >= 1.0 ) {
_net->InternalStep( );
_partial_internal_cycles -= 1.0;
}
_net->WriteOutputs( );
++_time;
// Eject traffic and send credits
Flit *last_valid_flit; //= new Flit;
for ( int output = 0; output < _dests; ++output ) {
f = _net->ReadFlit( output );
if ( f ) {
if (1 || f->tail) {
write_out_buf(output, f); // it should have space!
if ( f->watch ) {
cout << "Sent flit " << f->id << " to output buffer " << output << endl;
cout << " Not sending the credit yet! " <<endl;
}
} else {
if ( f->watch ) {
cout << "ejected flit " << f->id << " at output " << output << endl;
cout << "sending credit for " << f->vc << endl;
}
if ( _reorder ) {
if ( f->watch ) {
cout << "adding flit " << f->id << " to reorder buffer" << endl;
cout << "flit's SN is " << f->sn << " buffer's SN is "
<< _rob_sqn[f->src][f->dest] << endl;
}
if ( f->sn > _rob_sqn_max[f->src][f->dest] ) {
_rob_sqn_max[f->src][f->dest] = f->sn;
}
if ( f->head ) {
_rob_size->AddSample( f->sn - _rob_sqn[f->src][f->dest] );
}
f->rob_time = _time;
_rob[f->src][output].push( f );
} else {
_RetireFlit( f, output );
if ( !_empty_network ) {
_accepted_packets[output]->AddSample( 1 );
}
}
}
}
transfer2boundary_buf( output );
if (!credit_return_queue[output].empty()) {
last_valid_flit = credit_return_queue[output].front();
credit_return_queue[output].pop();
} else {
last_valid_flit=NULL;
}
if (last_valid_flit) {
cred = new Credit( 1 );
cred->vc[0] =last_valid_flit->vc;
cred->vc_cnt = 1;
cred->head = last_valid_flit->head;
cred->tail =last_valid_flit->tail;
_net->WriteCredit( cred, output );
if (last_valid_flit->watch) {
cout <<"WE WROTE A CREDIT for flit "<<last_valid_flit->id<<"To output "<<output<< endl;
}
_RetireFlit(last_valid_flit, output );
if ( !_empty_network ) {
_accepted_packets[output]->AddSample( 1 );
}
} else {
_net->WriteCredit( 0, output );
if ( !_reorder && !_empty_network) {
_accepted_packets[output]->AddSample( 0 );
}
}
if ( _reorder ) {
f = _ReadROB( output );
if ( f ) {
if ( f->watch ) {
cout << "flit " << f->id << " removed from ROB at output " << output << endl;
}
_RetireFlit( f, output );
if ( !_empty_network ) {
_accepted_packets[output]->AddSample( 1 );
}
} else {
if ( !_empty_network ) {
_accepted_packets[output]->AddSample( 0 );
}
}
}
}
}
void TrafficManager::_Step()
{
Flit *f;
Credit *cred;
// Inject traffic
if (_voqing)
{
_VOQInject();
}
else
{
_ClassInject();
}
// Advance network
_net->ReadInputs();
_partial_internal_cycles += _internal_speedup;
while (_partial_internal_cycles >= 1.0)
{
_net->InternalStep();
_partial_internal_cycles -= 1.0;
}
_net->WriteOutputs();
++_time;
// Eject traffic and send credits
for (int output = 0; output < _dests; ++output)
{
f = _net->ReadFlit(output);
if (f)
{
if (f->watch)
{
cout << "ejected flit " << f->id << " at output " << output
<< endl;
cout << "sending credit for " << f->vc << endl;
}
cred = new Credit(1);
cred->vc[0] = f->vc;
cred->vc_cnt = 1;
cred->head = f->head;
cred->tail = f->tail;
_net->WriteCredit(cred, output);
if (f->head && (f->dest != output))
{
cout << "At output " << output << endl;
cout << *f;
Error("Flit arrived at incorrect output");
}
if (_reorder)
{
if (f->watch)
{
cout << "adding flit " << f->id << " to reorder buffer"
<< endl;
cout << "flit's SN is " << f->sn << " buffer's SN is "
<< _rob_sqn[f->src][f->dest] << endl;
}
if (f->sn > _rob_sqn_max[f->src][f->dest])
{
_rob_sqn_max[f->src][f->dest] = f->sn;
}
if (f->head)
{
_rob_size->AddSample(f->sn - _rob_sqn[f->src][f->dest]);
}
f->rob_time = _time;
_rob[f->src][output].push(f);
}
else
{
_RetireFlit(f, output);
if (!_empty_network)
{
_accepted_packets[output]->AddSample(1);
}
}
}
else
{
_net->WriteCredit(0, output);
if (!_reorder && !_empty_network)
{
_accepted_packets[output]->AddSample(0);
}
}
if (_reorder)
{
f = _ReadROB(output);
if (f)
{
if (f->watch)
{
cout << "flit " << f->id << " removed from ROB at output "
<< output << endl;
}
_RetireFlit(f, output);
if (!_empty_network)
{
_accepted_packets[output]->AddSample(1);
}
}
else
{
if (!_empty_network)
{
_accepted_packets[output]->AddSample(0);
}
}
}
}
}