OPPO Kernel Craftsman
Dec 31, 2020 · Fundamentals
Load Balancing Mechanisms in the Linux CFS Scheduler: Periodic, NOHZ Idle, and New Idle Load Balancing
The article explains how the Linux CFS scheduler balances load using three mechanisms—periodic balancer on busy CPUs, NOHZ idle balancer that wakes idle CPUs in tickless mode, and the new idle balancer that checks overload and cache state—detailing their triggers, IPI interactions, timing intervals, and key data structures.
CFSIdle BalanceKernel
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