NDLI: Implementing declarative parallel bottom-avoiding choice

Content Provider	IEEE Xplore Digital Library
Author	Rauber Du Bois, A. Pointon, R. Loidl, H.-W. Trinder, P.
Copyright Year	2002
Description	Author affiliation: Dept. of Comput. & Electr. Eng., Heriot-Watt Univ., UK (Rauber Du Bois, A.; Pointon, R.; Loidl, H.-W.; Trinder, P.)
Abstract	Non-deterministic choice supports efficient parallel speculation, but unrestricted non-determinism destroys the referential transparency of purely-declarative languages by removing unfoldability and it bears the danger of wasting resources on unnecessary computations. While numerous choice mechanisms have been proposed that preserve unfoldability, and some concurrent implementations exist, we believe that no compiled parallel implementation has previously been constructed This paper presents the design, semantics, implementation and use of a family of bottom-avoiding choice operators for Glasgow parallel Haskell. The subtle semantic properties of our choice operations are described, including a careful classification using an existing framework, together with a discussion of operational semantics issues and the pragmatics of distributed memory implementation. The expressiveness of our choice operators is demonstrated by constructing a branch and bound search, a merge and a speculative conditional. Their effectiveness is demonstrated by comparing the parallel performance of the speculative search with naive and 'perfect' implementations. Their efficiency is assessed by measuring runtime overhead and heap consumption.
Sponsorship	SBC IFIP - International Federation for Inf. Process. IEEE Comput. Soc
Starting Page	82
Ending Page	89
File Size	309338
Page Count	8
File Format	PDF
ISBN	0769517722
DOI	10.1109/CAHPC.2002.1180763
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2002-10-28
Publisher Place	Brazil
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Yarn Neodymium Concurrent computing Runtime Control systems Proposals Computer architecture High performance computing Data structures Skeleton
Content Type	Text
Resource Type	Article

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