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《Acta Electronica Sinica》 2017-08
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An Energy Consumption Saving Method Based on Frequent Values and Bit Switching-Aware for On-chip Data Bus

ZHANG Ming-quan;GU Zhi-min;ZHANG Ji-zan;Department of Computer,North China Electric Power University;School of Computer Science and Technology,Beijing Institute of Technology;  
In the deep sub-micron technology domain,the energy consumption of data bus accounts for the energy consumption proportion of embedded multi-core chip is increasing. FV-MSB method was used to reduce the off-chip data bus energy consumption. However,it didn't deal with the non-frequent values and the lower parts of the frequent high-ordered bits values. In order to further reduce the dynamic energy consumption of which is induced by these values on the bus,an energy saving method based on frequent values and bit switching-aware for on-chip data bus is designed. Using the frequent values and the perception of the switching activities number,automatically selecting the encoding mode and so switching activities on the bus are significantly reduced,and therefore the bus dynamic energy is effectively reduced. With 70 nm technology,the results of simulation experiments showour method can improve the ratio of energy saving by about 17. 76% and average ratio about 16. 91%,and which is better than FV-MSB over 6. 28 %. And the trend of the energy saving ratio with λ shows that the method can still play the role when the technology size is further reduced in the future.
【Fund】: 国家自然科学基金(No.61370062)
【CateGory Index】: TN40
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