Abstract
With the use of new intelligent adapters, advanced bus architectures, and powerful microprocessors, the latest personal computers need a new architecture to coordinate the transfers of command and control information, data, and status between their system components in the most efficient manner. To this end, IBM has defined the Subsystem Control Block (SCB) architecture. In this paper, we would like to present our modeling approach to analyze the operational and performance characteristics of this architecture and its two operating modes, the Locate Mode and the Move Mode. The models, which were implemented using the IBM Research Queueing Package (RESQ), are described, and the results obtained from the models are presented. The analysis of these results demonstrates the capability of the SCB architecture to handle large amounts of data in a LAN-server environment, and the superiority of the Move Mode over the Locate Mode as defined in the architecture.
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