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A high performance dynamic token-based distributed synchronization algorithm

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2 Author(s)
I-Chi Lai, A. ; Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan ; Chin-Laung Lei

We propose a new dynamic token-based distributed synchronization algorithm that utilizes a new technique called optimistic broadcasting (optcasting) to improve efficiency. Briefly, an optcast message is a reliable unicast one that can also be heard by nodes other than its designated destination. Our algorithm manages pending token requesters by a distributed queue, and optcasts a direction towards the current queue end to help new requesters finding the queue end more quickly. Simulated experimental results indicate that our optcast algorithm outperforms the already fast Chang-Singhal-Liu (1990) (CSL) algorithm by up to 36%, especially for large systems of many processor nodes and under high synchronization loads. In addition, optcasting is highly robust and resistant to message loss, retaining at least 63% coverage even when the message loss rate approaches 100%

Published in:

Parallel Architectures, Algorithms, and Networks, 1997. (I-SPAN '97) Proceedings., Third International Symposium on

Date of Conference:

18-20 Dec 1997

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