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LFA-SkipList: NUMA-Aware한 시스템에서 원격 노드 접근 Latency를 줄이기 위한 SkipList 최적화
안성환(Sunghwan Ahn),장유진(Yujin Jang),하승준(Seungjun Ha),남범석(Beomseok Nam) Korean Institute of Information Scientists and Eng 2021 정보과학회논문지 Vol.48 No.1
Intels Optane DC Persistent Memory is a non-volatile memory that works faster than storage devices and stores data persistently. However, in the NUMA system, it takes a longer latency to access the remote memory of another CPU socket than for local NUMA access. Therefore, performance is degraded when configuring the SkipList in multiple non-volatile memories. In this paper, an LFA-SkipList was proposed to solve this problem. The LFA-SkipList has a newly added local pointer and uses it to access the local node first and then the remote node, thereby reducing unnecessary remote node access and improving performance. The study found the LFA-SkipList demonstrated a much shorter search time than that of the legacy SkipList.