Abstract
The problem studied is similar to the problems found in multiprocessor operating systems. The lockout problem in multiprocessor operating systems is a direct result of multiple processors attempting to process common data structures asynchronously. There are numerous such shared data structures. The models developed are applicable to the study of contention for software and hardware resources in multiprocessor operating systems. The authors introduce an approximate analytical model to evaluate the performance of asynchronous processes found in asynchronous algorithms, including the combined effects of software lockout on critical sections and on job queues, and of shared-memory access conflicts. Because of the strong similarities between the two effects, the same model can be used for both, leading to a uniform and elegant formulation. The models are combined to find the run-time efficiency of asynchronous iterations. >
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