run unit; execution unit
Computing term for a unit of execution, such as a thread, process, or task that can be scheduled and run independently.
In this system, each thread is treated as a single run unit.
スレッド is a specific type of run unit in many operating systems, while 実行単位 is a broader concept that can include processes, fibers, or tasks.
プロセス is a heavier execution unit with its own memory space, whereas 実行単位 can refer to any schedulable entity, including lightweight threads.
Compound of 実行 (execution) and 単位 (unit). A straightforward technical term with no known historical derivation beyond its component parts.