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In the Linux Kernel CONFIG_NO_HZ is not set. But an initial reading suggests that setting that option would be nice from a performance point of view. But reading some posts like this made me think again.

Why CONFIG_NO_HZ is not set by default or why no performance improvement when it is enabled?

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The performance improvement is not visible to everyone, just certain users for which RT kernels really matter : DSP, audio/video processing, and so on. So that config option is not universally beneficial, hence disabled.

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