Intelligent On/Off Dynamic Link Management for On-Chip Networks

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Executive Summary

Networks-on-Chips (NoCs) provide scalable on-chip communication and are expected to be the dominant interconnection architectures in multi-core and many-core systems. Power consumption, however, is a major limitation in NoCs today, and researchers have been constantly working on reducing both dynamic and static power. Among the NoC components, links that connect the NoC routers are the most power-hungry components. Several attempts have been made to reduce the link power consumption at both the circuit level and the system level. Most past research efforts have proposed selective on/off link state switching based on system-level information based on link utilization levels. Most of these proposed algorithms focus on a pessimistic and simple static threshold mechanism which determines whether or not a link should be turned on/off.

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