By Gopal Gupta

Multiprocessor Execution of common sense Programs addresses the matter of effective implementation of common sense programming languages, in particular Prolog, on multiprocessor architectures. The methods and implementations constructed try to take complete good thing about sequential implementation know-how built for Prolog (such because the WAM) whereas exploiting all types of keep an eye on parallelism found in common sense courses, particularly, or-parallelism, independentand-parallelism and based and-parallelism. Coverage contains athorough survey of parallel implementation recommendations and parallelsystems built for Prolog.
Multiprocessor Execution of good judgment Programs is suggested for individuals enforcing parallel good judgment programming structures, parallel symbolic structures, parallel AI structures, and parallel theorem proving structures. it is going to even be priceless to those that desire to find out about the implementation of parallel good judgment programming platforms.

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If the creator node of the variable is reached then the variable is unbound. Hash windows need not be duplicated on branching since they are shared. Time Stamping Method The time-stamping method, developed by Tinker and Lindstrom [TL87] uses time stamps to distinguish the correct binding for an environment. All bindings for a variable are visible to all the processors. All bindings are stamped with the time at which they were created. The bindings also record the process-id of the process which created them.

The backward execution phase picks the last parent (as defined by a linear ordering of subgoals, obtained by a depth first traversal of the data-flow graph) for the purpose of re-solving. 30 Multiprocessor Execution of Logic Programs Note that in this method data dependency analysis for constructing the data-flow graph has to be carried out every time a non-ground term is generated, making its cost prohibitive. APEX Model The APEX (And Parallel EXecution) model has been devised by Lin and Kumar [LK88].

The process involves traversing all the structures in node B which can be reached through the environment of node A. For each unbound variable V in such a structure a new variable V' is introduced inA. The unbound variable is made Parallel Execution Models 23 to point to this new variable. The structure is copied into A, with the variable V in that structure being replaced by the new variable V'. During execution, each new node introduced is closed with respect to its parent node after the unification is done.

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