Where to find extended information about menuconfig options?

I am especially interested in those related with improving latency/jitter of a RT_PREEMT kernel (apart of the obvious CONFIG_PREEMPT_RT_FULL).

Some context

Trying to improve the Jitter of a RT_PREEMPT kernel, I need to understand deeply some of the configuration options of the kernel, those available with menuconfig command line.

After searching on Internet, I found only the one-line description already available in the menuconfig interface. But due to my "low" knowledge of the kernel, most of them stay obscure to me, or at least not fully clear.

The project consists of building a real time software on a small one-board computer, but after patching the kernel and building everything, I still get quite random jitter (speaking of up to 0.5ms under load, when I would need 0.050ms or less)

Related pages:



  • 1
    The documentation, such as it is, is in a subdirectory of the kernel source. Jan 15, 2018 at 14:30

1 Answer 1


The following link was of help:


  • the following link is dead, that's why the relevant content should be provided in an answer -1
    – Christian
    Jan 15, 2018 at 12:27
  • Unfortunately, this information is copyrighted, but I let's you the opportunity to post your notes and get up-votes. In the while, I just updated the link so it works again (seem the author changed the title) Jan 15, 2018 at 12:40

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