Abstract
The global quiescence (GQ) of a distributed computation (or distributed termination detection) is an important problem. Some concurrent programming languages and systems provide GQ detection as a built-in feature so that programmers do not need to write special synchronization code to detect quiescence. This paper introduces partial quiescence (PQ), which generalizes quiescence detection to a specified part of a distributed computation. PQ is useful, for example, when two independent concurrent computations that both rely on GQ need to be combined into a single program. The paper describes how we have designed and implemented a PQ mechanism within an experimental version of the JR concurrent programming language, and have gained experience with several representative applications. Our early results are promising qualitatively and quantitatively. Copyright © 2007 John Wiley & Sons, Ltd.
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