By offering a shared address space across a number of processors connected by a local area network, the distributed shared memory model offers an attractive way of programming parallel-distributed applications. Such programming can be done either using a memory model based on objects or linear memory. Very few performance studies have been made of such systems. The author describes the motivation and the methodology for a project which compares performance of the object model to the linear memory model. Execution-driven simulation is used to analyze the performance and scalability of the systems for appearing fast processors and new highspeed networks.
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