Virtual channels in networks on chip: implementation and evaluation on hermes NoC

Networks on chip (NoCs) draw on concepts inherited from distributed systems and computer networks subject areas to interconnect IP cores in a structured and scalable way. Congestion in NoCs reduces the overall system performance. This effect is particularly strong in networks where a single buffer is associated with each input channel, which simplifies router design, but prevents packets from sharing a physical channel at any given instant of time. The goal of this work is to describe the implementation of a mechanism to reduce performance penalization due to packet concurrence for network resources in NoCs. One way to reduce congestion is to multiplex a physical channel using virtual channels (VCs). VCs reduce latency and increase network throughput. The insertion of VCs also enables to implement policies for allocating the physical channel bandwidth, which enables to support quality of service (QoS) in applications. This paper has two main contributions. The first is the detailed im...

• Type: Conference
• Year: 2005
• Where: SBCCI
• Authors: Aline Mello, Leonel Tedesco, Ney Calazans, Fernando Moraes
• Keywords: Nocs, Physical Channel, SBCCI 2005, VCs Reduce Latency