LDU: A Lightweight Concurrent Update Method with Deferred Processing for Linux Kernel Scalability

Joohyun Kyong and Sung-Soo Lim


Scalability, Operating System, Linux, Concurrent Update


We propose a novel light weight concurrent update method, LDU, to improve performance scalability for Linux kernel on many-core systems through eliminating lock contentions for update-heavy global data structures during process spawning and optimizing update logs. The proposed LDU is implemented into Linux kernel 3.19 and evaluated using representative benchmark programs. Our evaluation reveals that the Linux kernel with LDU shows performance improvement by ranging from 1.2x through 2.2x on a 120 core system.

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