TY  - JOUR
T1  - Optimizing LRU Lock Management in the Linux Kernel for
Improving Parallel Write Throughout in Many-Core CPU Systems
AU  - Byun, Eun-Kyu 
AU  - Gu, Gibeom 
AU  - Oh, Kwang-Jin 
AU  - Bang, Jiwoo 
JO  - KIPS Transactions on Computer and Communication Systems
PY  - 2023
DA  - 2023/1/30
DO  - https://doi.org/10.3745/KTCCS.2023.12.7.209
KW  - Manycore CPU
KW  - Linux Kernel
KW  - LRU
KW  - Parallel I/O
AB  - Modern HPC systems are equipped with many-core CPUs with dozens of cores. When performing parallel I/O in such a system, there
is a limit to scalability due to the problem of the LRU lock management policy of the Linux system. The study proposes an improved
FinerLRU to solve this problem. Our new FinerLRU improves the parallel write performance of file systems using the buffer cache through
granular lock management by increasing the number of LRU locks upto the maximum number of cores. The proposed method was
implemented in Linux 5.18.11, and the performance was measured on two types of CPUs, Intel Icelake Xeon and Intel Knights landing,
with different characteristics, and it was found that a performance improvement of about two times can be obtained in both types of
systems.