UML Activity Diagram Control Flow in Multiprocessor Systems

The patent introduces an intermediary mechanism (barrier-counter format and event signal origin tracking) that mediates between multiple event signal sources and the join primitive. This intermediary tracks which processor sent each event signal and ensures the join primitive only completes when all required processors have signaled, preventing incorrect control flow management while maintaining a relatively simple primitive interface.

The patent segments the event signal handling by distinguishing signals from different processor sources. Each event signal carries origin information that allows the system to track and count signals from specific processors separately. This segmentation enables reliable control flow management in multiprocessor systems by ensuring that join primitives receive and recognize signals from all required sources before proceeding.

The barrier-counter format acts as an intermediary between event signal sources and the join primitive logic. It receives event signals, tracks their origins using processor identifiers, maintains a count of received signals from each source, and only triggers the join primitive when all required signals have been received. This intermediary mechanism ensures reliable join primitive operation without requiring complex tracking logic throughout the entire system.

The system implements feedback by having the barrier-counter continuously monitor and count event signals from different processors, comparing the received signals against the expected number of signals. This feedback mechanism ensures that the join primitive only executes when all necessary conditions are met, preventing malfunctions while maintaining clear and manageable implementation logic.