Overview

Concurrent data structures simplify the development of concurrent programs by encapsulating commonly used mechanisms for synchronization and commu­ nication into data structures. This thesis develops a notation for describing concurrent data structures, presents examples of concurrent data structures, and describes an architecture to support concurrent data structures. Concurrent Smalltalk (CST), a derivative of Smalltalk-80 with extensions for concurrency, is developed to describe concurrent data structures. CST allows the programmer to specify objects that are distributed over the nodes of a concurrent computer. These distributed objects have many constituent objects and thus can process many messages simultaneously. They are the foundation upon which concurrent data structures are built. The balanced cube is a concurrent data structure for ordered sets. The set is distributed by a balanced recursive partition that maps to the subcubes of a binary 7lrcube using a Gray code. A search algorithm, VW search, based on the distance properties of the Gray code, searches a balanced cube in O(log N) time. Because it does not have the root bottleneck that limits all tree-based data structures to 0(1) concurrency, the balanced cube achieves 0C.:N) con­ currency. Considering graphs as concurrent data structures, graph algorithms are pre­ sented for the shortest path problem, the max-flow problem, and graph parti­ tioning. These algorithms introduce new synchronization techniques to achieve better performance than existing algorithms.

Full Product Details

Author:   J. W. Dally
Publisher:   Kluwer Academic Publishers
Imprint:   Kluwer Academic Publishers
Edition:   1987 ed.
Volume:   27
Dimensions:   Width: 15.50cm , Height: 1.50cm , Length: 23.50cm
Weight:   1.220kg
ISBN:  

9780898382358

ISBN 10:   0898382351
Pages:   244
Publication Date:   30 September 1987
Audience:   College/higher education ,  Professional and scholarly ,  Postgraduate, Research & Scholarly ,  Professional & Vocational
Format:   Hardback
Publisher's Status:   Active
Availability:   In Print  
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Table of Contents

1 Introduction.- 1.1 Original Results.- 1.2 Motivation.- 1.3 Background.- 1.4 Concurrent Computers.- 1.5 Summary.- 2 Concurrent Smalltalk.- 2.1 Object-Oriented Programming.- 2.2 Distributed Objects.- 2.3 Concurrency.- 2.4 Locks.- 2.5 Blocks.- 2.6 Performance Metrics.- 2.7 Summary.- 3 The Balanced Cube.- 3.1 Data Structure.- 3.2 Search.- 3.3 Insert.- 3.4 Delete.- 3.5 Balance.- 3.6 Extension to B-Cubes.- 3.7 Experimental Results.- 3.8 Applications.- 3.9 Summary.- 4 Graph Algorithms.- 4.1 Nomenclature.- 4.2 Shortest Path Problems.- 4.3 The Max-Flow Problem.- 4.4 Graph Partitioning.- 4.5 Summary.- 5 Architecture.- 5.1 Characteristics of Concurrent Algorithms.- 5.2 Technology.- 5.3 Concurrent Computer Interconnection Networks.- 5.4 A Message-Driven Processor.- 5.5 Object Experts.- 5.6 Summary.- 6 Conclusion.- A Summary of Concurrent Smalltalk.- B Unordered Sets.- B.1 Dictionaries.- B.2 Union-Find Sets.- C On-Chip Wire Delay.

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