The pages describe SBCL alone: the requirements, the test command, the
processor count by platform, and what cl-threads/sys takes from SBCL.
The comparisons with CCL and its join-process go.
Follow cl-threads 50f196a: INTERRUPT-THREAD, thread bindings, pool streams
Threads and Synchronisation describes MAKE-THREAD's :BINDINGS and
INTERRUPT-THREAD, and a semaphore signalled with a count of 0. Job
Pools says that a sleeping worker keeps nothing its jobs used alive, and
that :BINDINGS can give the workers streams of their own. Thread Rules
and the API Reference follow.