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        Dynamic Row Activation Mechanism for Multi-Core Systems

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        Author
        Alawneh, Tareq A.
        Kirner, Raimund
        Menon, Catherine
        Attention
        2299/24525
        Abstract
        The power that stems from modern DRAM devices represents a sig- nificant portion of the overall system power in modern computing systems. In multi-core systems, the competing cores share the same memory banks. The memory contention between these cores may lead to activate a large DRAM row only to access a small portion of data. This row over-fetching problem wastes a significant DRAM activation power with a slight performance gain. In this paper, we propose a dynamic row activation mechanism, in which the optimal size of DRAM rows is detected at run-time based on monitoring the behavioural changes of the memory re- quests in accessing sub-rows. The proposed mechanism aims at providing significant memory power savings, reducing the average memory access latency, and maintaining the full DRAM bandwidth. Our experimental results using four-core multi-programming work- loads revealed that the proposed mechanism in this study can achieve both significant memory power reduction and average DRAM memory access latency improvement with negligible area overhead.
        Publication date
        2021-05-13
        Published in
        CF '21: Proceedings of the 18th ACM International Conference on Computing Frontiers
        Published version
        https://doi.org/10.1145/3457388.3458660
        Other links
        http://hdl.handle.net/2299/24525
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