In this paper we investigate the combination of multitasking and multithreading in a (virtual) shared memory parallel machine running a number of parallel applications. In particular, we investigate whether it is better to run related threads, or unrelated threads on each node to achieve the best system throughput and to complete a mix of applications as quickly as possible. The experiments provide results for a range of mixes of applications. One of our benchmarks has a clear preference to place its threads across the whole machine, while the others have a slight preference to run their threads on smaller partitions of the machine. The differences are mostly slight, suggesting that the system scheduler has considerable flexibility in thread placement without jeopardising performance.

article Andorra I: a parallel Prolog system that transparently exploits both And-and or-parallelism Share on Authors: Vítor Santos Costa View Profile , David H. D. Warren View Profile , Rong Yang View Profile Authors Info & Claims ACM SIGPLAN NoticesVolume 26Issue 7July 1991 pp 83–93https://doi.org/10.1145/109626.109635Online:01 April 1991Publication History 48citation350DownloadsMetricsTotal Citations48Total Downloads350Last 12 Months8Last 6 weeks3 Get Citation AlertsNew Citation Alert added!This alert has been successfully added and will be sent to:You will be notified whenever a record that you have chosen has been cited.To manage your alert preferences, click on the button below.Manage my AlertsNew Citation Alert!Please log in to your account Save to BinderSave to BinderCreate a New BinderNameCancelCreateExport CitationPublisher SiteGet Access

By exploring the relationship between parsing and deduction, a new and more general view of chart parsing is obtained, which encompasses parsing for grammar formalisms based on unification, and is the basis of the Earley Deduction proof procedure for definite clauses. The efficiency of this approach for an interesting class of grammars is discussed.

Americanae nace como un proyecto conjunto que surge dentro de la Red Europea de Información y Documentación sobre América Latina (REDIAL), y que ha afrontado la Biblioteca de la Agencia Española de Cooperación Internacional para el Desarrollo (AECID). Esta nueva biblioteca virtual hace más accesibles los libros digitales de tema americanista a los investigadores y usuarios interesados de cualquier parte del mundo.

Abstract The concept of ‘logic programming’, and its practical application in the programming language Prolog, are explained from first principles. The ideas are illustrated by describing in detail one sizable Prolog program which implements a simple compiler. The advantages and practicability of using Prolog for ‘real’ compiler implementation are discussed.