Real Time Scheduling Without A Real-Time Kernel

Armbian doesn’t ship with a real-time kernel and I can’t be arsed to build one, but I still needed real-time scheduling for Jack.

The solution? It's pretty simple. 

Crack open a copy of nano and point it at 99-realtime.conf

sudo nano /etc/sysctl.d/99-realtime.conf

Paste this in and give it a save. 

kernel.sched_rt_runtime_us = -1

Reboot the system and you're good to go.