CPU Isolation

[Andrey V. Elsukov]

On 22.01.2019 21:29, Mark Saad wrote:
> All
>  I am looking to setup a 12-STABLE box in a way that is similar to a
> CentOS server I am running.
> That server is setup using the boot option isocpus, to remove
> cores/cpus from the kernel scheduler at boot.  What I want to try on
> 12-STABLE is to set aside some cores to run process and some kernel
> threads that will only always run on a dedicated core with out the
> chance for being preempted / interrupted by something else on that
> core / cpu . What I do not see is a way to  evict processes off a
> running cpu post boot or a way to isolate them preboot. Am  I missing
> something?
> 

After r331723 it is possible to make such separation after boot using
cpuset(8). If you need this a bit early, you need to modify sbin/init.

-- 
WBR, Andrey V. Elsukov

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