Virtual Cut-through
Combines benefits of packet and circuit switching
Message divided into small units called ‘flits’ (flow control digits).
- If required channels are free, flits are forwarded in pipeline fashion between nodes flit by flit
- If required channels are busy, flits are buffered at intermediate nodes
Latency L = Hf/B *D + M/B
- Hf is the length of the header flit. If Hf << M, then latency is the same as circuit switching.