Taskset is supplied by busybox, which doesn't support that.   But you
can install util-linux.tcz  That should install the full version of
taskset.

Be aware that Squeezelite starts 4 threads, and it already launches the
output thread with a Fifo scheduling scheduling priority.   You can
change the priority level on the squeezelite commandline.

CPU3 should be harmless to isolate.   I don't think that is going to do
what you want, as I'm pretty sure that spin_locks will still affect all
cores.

I've been testing an RT kernel, which seems pretty stable.   Latencies
are under 75 microseconds under normal squeezelite loads.


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