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Low-Complexity Policies for Energy-Performance Tradeoff in Chip-Multi-Processors

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3 Author(s)
Elyada, A. ; Electr. Eng. Dept., Technion - Israel Inst. of Technol., Haifa ; Ginosar, R. ; Weiser, U.

Chip-multi-processor (CMP) utilize multiple energy-efficient processing elements (PEs) to deliver high performance while reducing energy-consumption. Dynamic frequency-Voltage Scaling (DVS) balances performance and energy consumption by varying PEs' frequency-voltage workpoints to save energy while meeting performance requirements. We consider multi-task CMP applications with unknown workloads, and dynamically set workpoints to minimize . Heuristic policies for serial/parallel task-graphs are investigated. We compare these policies to a theoretical bound and show that they achieve good results with low complexity. In most cases the simplest policy, which usually assigns constant workpoints, is also the most cost-effective one.

Published in:

Very Large Scale Integration (VLSI) Systems, IEEE Transactions on  (Volume:16 ,  Issue: 9 )