• Title/Summary/Keyword: Cascaded Cache

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A Study on Design and Cache Replacement Policy for Cascaded Cache Based on Non-Volatile Memories (비휘발성 메모리 시스템을 위한 저전력 연쇄 캐시 구조 및 최적화된 캐시 교체 정책에 대한 연구)

  • Juhee Choi
    • Journal of the Semiconductor & Display Technology
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    • v.22 no.3
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    • pp.106-111
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    • 2023
  • The importance of load-to-use latency has been highlighted as state-of-the-art computing cores adopt deep pipelines and high clock frequencies. The cascaded cache was recently proposed to reduce the access cycle of the L1 cache by utilizing differences in latencies among banks of the cache structure. However, this study assumes the cache is comprised of SRAM, making it unsuitable for direct application to non-volatile memory-based systems. This paper proposes a novel mechanism and structure for lowering dynamic energy consumption. It inserts monitoring logic to keep track of swap operations and write counts. If the ratio of swap operations to total write counts surpasses a set threshold, the cache controller skips the swap of cache blocks, which leads to reducing write operations. To validate this approach, experiments are conducted on the non-volatile memory-based cascaded cache. The results show a reduction in write operations by an average of 16.7% with a negligible increase in latencies.

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