Re: PREEMPT_RT patches


Leon Woestenberg
 

Hello Steven,

Yocto does support switching kernels and configurations, so yes Yocto does "support" it.

However, providing a well-tested PREEMPT_RT kernel might be more an architectural meta layer topic.

We have been using the Intel provided PREEMPT_RT kernel for x86 with good success in a system with hard real-time requirements.
In the end we chose full task isolation approach, where one task runs in user-space task isolation, reducing latencies even further than what PREEMPT_RT can provide, as we did not need kernel services in our main processing loop (after setup).

Regards,

Leon.


On Wed, May 19, 2021 at 12:53 PM Monsees, Steven C (US) via lists.yoctoproject.org <steven.monsees=baesystems.com@...> wrote:

 

Recently I heard somewhere that newer versions of the Linux Kernel will include the PREEMPT_RT patches, and configuration settings would be used to set how the Linux would operate in a specific system.

 

Does Yocto support “PREEMPT_RT”, and what versions of Yocto have this option ?

 

Is there documentation on this feature/option ?

 

Thanks,

Steve

 




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