A design for a multiple user multiprocessing system

Abstract

The B8500 system is designed to deal with the following situation. A large number of active programs requiring various services are present in the system and their current status and required service are recorded. When some component of the system becomes available, e.g., processor, memory space, peripheral device, it is assigned to the active job of highest priority that requires this service. The important concept is that no component of the system belongs to any program but rather provides a service and then goes on to service another program. The main function of the executive scheduling program is to keep track of the services required by programs and to schedule the services when equipment becomes available.