Ejemplo n.º 1
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
    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 );
                }
            }
        }
    }
}
Ejemplo n.º 2
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);
				}
			}
		}
	}
}