Laios, a parallel execution of Prolog by data copies:

Abstract: "LAIOS (Lattice for Artificial Intelligence Oriented System) is a project defining a multiprocessor architecture oriented to artificial intelligence applications. The execution model is the AND/OR tree; the control is realized by automata and authorizes OR parallelism and AND pipelini...

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Bibliographische Detailangaben
1. Verfasser: Duprat, Jean (VerfasserIn)
Format: Buch
Sprache:English
French
Veröffentlicht: Lyon 1990
Schriftenreihe:Laboratoire d'Informatique du Parallélisme <Lyon>: Rapports de recherche du LIP 1990,1
Schlagworte:
Zusammenfassung:Abstract: "LAIOS (Lattice for Artificial Intelligence Oriented System) is a project defining a multiprocessor architecture oriented to artificial intelligence applications. The execution model is the AND/OR tree; the control is realized by automata and authorizes OR parallelism and AND pipelining. PROLOG programs are compiled into frame nodes and execution dynamically creates process nodes. The data flows along the branches of the execution tree. In each process node, a computation is realized by an universal operator. The data are physically copied step by step, making parallelism and nondeterministic implementations easier
An architecture is defined, supporting such a model. It uses self-defined data, structured in blocks. The lattice is composed of modules connected by two topologies corresponding to two levels of communications. A hexagonal network where neighbours communicate by dualports memories provides data circulation. A centralized network distributes the program where all the modules are connected by shared buses to a mass storage containing the knowledge base. First simulations have validated the model and the architecture
The performance (without limitations of the number of nodes) is still modest, about tens of KLIPS depending on the program. These simulations permit one to understand the rules and the parameters that govern the parallel execution of PROLOG programs on this lattice and using this model.
Beschreibung:19 S.

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