Technical Report CS0403

Title: Temorary Stability in Parallel Programs
Authors: Shmuel Katz
Abstract: A class of safety properties of parallel or distributed programs is defined and investigated. The property is known as temporary stability, and it relates a global property P, a second property B, and a set of processes S to which B is local (in a sense defined in the paper). Intuitively, P is temporarily stable until B in S if P remains true until B becomes true, and only a process in S can cause B. Several examples of the usefulness of this class of properties are given, as well as rules for establishing and manipulating temporary stabilities. The rules can be used both for program analysis, and as part of a systematic development of parallel programs. These properties are also shown to be a natural extension of the class of stable properties.
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