RECN-IQ: A Cost-Effective Input-Queued Switch Architecture with Congestion Management

As the number of computing and storage nodes keeps increasing, the interconnection network is becoming a key element of many computing and communication systems, where the overall performance directly depends on network performance. This performance may dramatically drop during congestion situations. Although congestion may be avoided by overdimensioning the network, the current trend is to reduce overall cost and power consumption by reducing the number of network components. Thus, the network will be prone to congestion, thereby becoming mandatory the use of congestion management techniques. In that sense, the technique known as Regional Explicit Congestion Notification (RECN) completely eliminates the Head-of-Line (HOL) blocking produced by congested packets, turning congestion harmless. However, RECN has been designed for switches with queues at input and output ports (CIOQ switches), thus it can not be directly applied to other types of switches. Additionally, the method RECN us...

• Type: Conference
• Year: 2007
• Where: ICPP
• Authors: Gaspar Mora, Pedro Javier García, Jose Flich, José Duato
• Keywords: Congestion Management Techniques, Congestion Situations, Distributed And Parallel Computing, Explicit Congestion Notification, ICPP 2007