Re: [patch] Real-Time Preemption, -RT-2.6.10-rc2-mm2-V0.7.29-0

[Ingo Molnar]

* Florian Schmidt <mista.tapas@xxxxxxx> wrote:

> here are the different layers of preemption:
> 
>  - !PREEMPT
>  - PREEMPT_VOLUNTARY
>  - PREEMPT
>  - PREEMPT_RT
> 
> each step forward decreases latencies, at the cost of more runtime
> overhead.

yes, and here is how they show up in the config:

               ( ) No Forced Preemption (Server)
               ( ) Voluntary Kernel Preemption (Desktop)
               ( ) Preemptible Kernel (Low-Latency Desktop)
               (X) Complete Preemption (Real-Time)

measurements are needed to find out how latencies and runtime overhead
vary between these levels.

	Ingo
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