Is it nix you are asking about?
http://lsub.org/ls/nix.html

On Sat, Dec 29, 2018, 13:44 Mayuresh Kathe <mayuresh@kathe.in wrote:

> I can't remember the name of the person, but he used to work for a
> European research lab and had made a 64-bit version of an operating
> system derived from Plan 9. That operating system had some interesting
> features, one of which was the ability to isolate a process on a single
> core of a CPU.
>
> Does anyone have more details about that operating system? Or would
> anyone know the name of that person?
> It would be nice to work with that operating system and I would be
> willing to pay a license fee to use it if granted access to the source
> for personal study.
>
> Thanks,
>
> ~Mayuresh
>
>
>