Adaptive Power Management for the On-Chip Communication Network
An on-chip communication network is most power efficient when it operates just below the saturation point. For any given traffic load the network can be operated in this region by adjusting frequency and voltage. For a deflective routing network the authors propose the design of a central controller for dynamic frequency and voltage scaling. Given history information including the load and frequency in the network, the controller adjusts the frequency and voltage such that the network operates just below the saturation point. They provide control mechanisms for continuous and discrete frequency ranges. With a discrete frequency range and taking into account voltage switching delays, they evaluate the control mechanism under stochastic, smoothly varying and very bursty traffic.