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Program-Level Control of Network Delay for Parallel Asynchronous Iterative Applications

Joseph, PJ and Vajapeyam, Sriram (1996) Program-Level Control of Network Delay for Parallel Asynchronous Iterative Applications. In: 3rd International Conference on High Performance Computing, 1996, 19-22 December, Trivandrum,India, pp. 88-93.


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Software distributed shared memory (DSM) platforms on networks of workstations tolerate large network latencies by employing one of several weak memory consistency models. Fully asynchronous parallel iterative algorithms offer an additional degree of freedom to tolerate network latency. They behave correctly when supplied outdated shared data. However these algorithms can flood the network with messages in the presence of large delays. We propose a method of controlling asynchronous iterative methods wherein the reader of a shared datum imposes an upper bound on its age via use of a blocking Global Read primitive. This reduces the overall number of iteration is executed by the reader; thus controlling the amount of shared updates generated. Experiments for a fully asynchronous linear equation solver running on a network of 10 IBM RS/6000 workstations show that the proposed Global Read primitive provides significant performance improvement.

Item Type: Conference Paper
Publisher: IEEE
Additional Information: Copyright 1990 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Department/Centre: Division of Interdisciplinary Sciences > Supercomputer Education & Research Centre
Division of Electrical Sciences > Computer Science & Automation
Date Deposited: 06 May 2006
Last Modified: 19 Sep 2010 04:26
URI: http://eprints.iisc.ac.in/id/eprint/6609

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