Another technique to dynamically manipulate task isolation is through the kernel's 'cpuset' interface (https://www.kernel.org/doc/html/latest/admin-guide/cgroup-v1...). Coupled with threadirqs, and RCU 'kthread-ification' with rcu_nocbs, can wield a large amount of flexibility in organizing real-time workloads. The userspace interface to cpusets via 'cpuset' makes it even more accessible (https://documentation.suse.com/sle-rt/15-SP1/html/SLE-RT-all...)