Performance of the Compiler-based Andorra-I System

Andorra-I is an experimental parallel Prolog system based on the Basic Andorra model. This model supports both dependent and-parallelism, by executing determinate goals in parallel, and or-parallelism, stemming from the nondeterminate goals. In this paper, we present a new compiler-based version of the Andorra-I system and discuss its performance. We study the system with a wide set of real-life, non-trivial logic programming applications. As Andorra-I provides a powerful programming model, we are able to include Prolog programs, committed-choice programs, and Andorra-style programs. The results show that the system is very effective at exploiting both forms of parallelism, that it compares well with exclusively or-parallel and exclusively and-parallel systems, and that the extra complexity of the model is manageable. Basic performance compares quite well with other compiler-based systems such as SICStus and JAM. 1 Introduction Andorra-I is an experimental parallel Prolog system based..