An Efficient and Reliable Retransmission Mechanism for On-Chip Network of Many-Core Processor

Building a reliable and efficient Network-on-chip(NOC) system has always been an important part of the research on many-core processor architecture. In this paper, we propose a retransmission mechanism for many-core processor using dynamic pipeline and static flow control, which can break the deadlock caused by sharing channel on 2D mesh NOC. The configuration of key parameters in this retransmission mechanism is given by modeling. The modeling analysis and actual test results show that, the retransmission mechanism can not only avoid congestion and deadlock in NOC, but also effectively satisfies network bandwidth and memory access performance by properly set the depth of retransmission sender queue and retransmission receiver queue in different address mapping modes and transmission delays.