How to dedicate a CPU for real time applications?

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Hi!

Although -rt provides exceptionaly low latencies, i'd like
to try out further optimization by dedicating one CPU in
a SMP system for real time application ("Shielded CPU").

If applying "isolcpus=1", then most processes will be
bound to CPU0 as expected (per CPU kernel threads need
to stay), but, interrupts are still distributed amongst
CPUs. I tried to modify /proc/irq/*/smp_affinity, but
the cpu mask doesn't change for most interrupts.

Any ideas what could be the problem? TIA!

regards

Bernhard

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