Is there a low latency kernel available for 32 bit systems?

It is available only for 64 bit systems (also called amd64). If the -preempt kernel does not provide enough low latency for your needs (or you have an 32 bit system) then you should try the -lowlatency kernel. If the -lowlatency kernel isn't enough then you should try the -rt kernel

Does the -PREEMPT kernel reduce latency?

This reduces latency but doesn't sacrifice power saving features. It is available only for 64 bit systems (also called amd64). If the -preempt kernel does not provide enough low latency for your needs (or you have an 32 bit system) then you should try the -lowlatency kernel.

What is target latency and minimum granularity?

Suppose that the target latency (TL) is 20ms and the minimum granularity (MG) is 4ms: In this case, five or fewer tasks would allow each task a turn on the processor during the target latency.

Should I use the -lowlatency or -RT kernel?

If the -preempt kernel does not provide enough low latency for your needs (or you have an 32 bit system) then you should try the -lowlatency kernel. If the -lowlatency kernel isn't enough then you should try the -rt kernel If the -rt kernel isn't enough stable for you then you should try the -realtime kernel

Linux Kernel: Targeted Latency vs Minimum Granularity

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In context of CFS Scheduler of Linux Kernel what are the most important differences between Targeted Latency and Minimum Granularity.

Or how do we define Targeted Latency and Minimum Granularity.

Mathematical explanation is highly appreciated.

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