There's another paper from an iwp9 http://9p.io/iwp9/Real-time.pdf that might provide more detail

On Tue, 29 Aug 2023 at 18:19, <ori@eigenstate.org> wrote:

Quoth dusan3sic@gmail.com:
> I was reading an article about plan9's realtime scheduler edf (http://doc.cat-v.org/plan_9/real_time/real_time_in_a_real_operating_system/real_time_in_a_real_operating_system.pdf, page 7), and they mentioned using /dev/realtime to create realtime processes, but /dev/realtime doesn't exist on my machine (I am using 9front). I found a post here from 07 saying something about removing it a long time ago, but it got no answers.
>
> In proc(3) they mention some commands for configuring realtime processes but I don't know if that is to configure an already made realtime process or to make one from a regular. How do i make realtime processes in these days?

it's the bits you found in /proc; there are no (longer?)
any special real time processes; any process can become
real time by setting up deadlines at any point.

/dev/realtime isn't needed any more.

unfortunately, I'm not aware of any programs using it.

(that may be a good question for the list: where was the
real time scheduler used, and does any code using it
survive?)



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