An optimal algorithm for mutual exclusion in computer networks
Communications of the ACM
Distributed processes: a concurrent programming concept
Communications of the ACM
Communications of the ACM
Programming with abstract data types
Proceedings of the ACM SIGPLAN symposium on Very high level languages
Rationale for the design of the Ada programming language
ACM SIGPLAN Notices - Rationale for the deisgn of the Ada programming language
Hierarchical function distribution - a design principle for advanced multicomputer architectures
ISCA '83 Proceedings of the 10th annual international symposium on Computer architecture
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Multicomputer systems with distributed control form an architecture that simultaneously satisfies such design goals as high performance through parallel operation of VLSI processors, modular extensibility, fault tolerance, and system software simplication. The nodes of the system may be locally concentrated or spatially dispersed as a local network. Applications range from data base-oriented transactional systems to “number crunching.” The system is service-oriented; that is, it appears to the user as one computer on which parallel processing takes place in the form of cooperating processes. Cooperation is regulated by the unique interprocess communication (IPC) protocol presented in this paper. The high-level protocol is based on the computer/producer model and satisfies all requirements for such a distributed multicomputer system. It is demonstrated that the protocol lends itself toward a straightforward mechanization by dedicated hardware consisting of a cooperation handler, an address transformation and memory guard unit, and bus connection logic. These special hardware resources, assisted by a “local operating system”, form the supervisor of a node. Nodes are connected by a high-speed bus (280M bit/sec). Programming aspects as implied by the IPC protocol are also described.