Refining Core Development Skills
Feb 22, 2023 · Fundamentals
Understanding Linux CPU Utilization Statistics and the Top Command
This article explains how Linux calculates CPU utilization shown by the top command, detailing the role of /proc/stat, kernel sampling mechanisms, and the handling of user, nice, system, IRQ, soft‑IRQ, iowait and idle times, while providing code examples and practical insights.
CPU utilizationKernelproc stat
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