Multiplexed threads

The Threads Library ``multiplexes'' threads among the pool of available LWPs for the process.

• An LWP can pick up and run only one thread at a time.

• After a time the LWP will ``put down'' (stop running) its current thread and pick up another.

• Some time later the thread will be picked up again; not necessarily by the previous LWP.

• The algorithm by which a thread is associated with an LWP and later preempted is covered in ``Multiplexed thread scheduling''.

• On multiprocessor systems, a larger number of LWPs implies a greater chance that different threads of the process will be executed simultaneously (that is, true, not logical concurrency).