An evaluation of priority consistency in protocol architectures

Abstract
Workstations for digital audio and video applications must support predictable processing, presentation, and transmission of continuous media data while making ef- ficient use of limited hardware resources. We present techniques for managing network resources and process- ing messages in a predictable fashion. Our solutions use a novel structure for the protocol processing software, and we examine several alternatives and discuss the engineer- ing tradeoffs associated with each. Using simulation, we evaluate our protocol processing structures and show that the more sophisticated structures can improve the response time and predictability of time-constrained messages. The ideas presented in this paper can be applied to resource management in the operating system and to the structuring of application-level servers. The designers of gateway ma- chines (for internetwork routing) which handle both time- constrained traffic and non-time-constrained traffic may also benefit from this study.

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