Codelet
First heard this terminology being used at NVIDIA. In that case, if was a proprietary product.
However, it seems that it is used in similar scenarios:
A codelet is a (usually short) sequence of machine instructions that executes until completion: Save for very specific events (e.g., the core on which a codelet executes has been flagged as faulty), a codelet cannot be interrupted and migrated elsewhere (i.e., it is non-preemptible).
When a codelet releases some resources, or produces/updates some data items, it signals the codelets and/or system software that depend on such events to become ready for execution. Hence, codelets which share dependences form a graph, which we denote as Codelet Graph (CDG). A CDG is a directed graph where the vertices are codelets, and arcs are dependencies flowing from one codelet to the other. While a CDG can be distributed over the whole Codelet Abstract Machine Model, portions of it are usually allocated to specific parts of it, usually a specific cluster. Codelet subgraphs are most often allocated through Threaded Procedures.