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ACM Transactions on Design Automation of Electronic Systems 1998年第3期3卷 408-436页

作者： Mathur, Anmol Dasdan, Ali Gupta, Rajesh K. Silicon Graphics Inc. Urbana IL 61801 United States University of Illinois-Urbana-Champaign Urbana IL 61801 United States University of California-Irvine Urbana IL 61801 United States Cadence Design Systems Ambit Group Santa Clara CA 2500 Augustine Dr. United States Department of Computer Science University of Illinois at Urbana-Champaign Urbana IL 61801 United States Department of Information and Computer Science University of California Irvine CA 92697 United States

Embedded systems consist of interacting components that are required to deliver a specific functionality under constraints on execution rates and relative time separation of the components. In this article, we model an embedded system using concurrent processes interacting through synchronization. We assume that there are rate constraints on the execution rates of processes imposed by the designer or the environment of the system, where the execution rate of a process is the number of its executions per unit time. We address the problem of computing bounds on the execution rates of processes constituting an embedded system, and propose an interactive rate analysis framework. As part of the rate analysis framework we present an efficient algorithm for checking the consistency of the rate constraints. Bounds on the execution rate of each process are computed using an efficient algorithm based on the relationship between the execution rate of a process and the maximum mean delay cycles in the process graph. Finally, if the computed rates violate some of the rate constraints, some of the processes in the system are redesigned using information from the rate analysis step. This rate analysis framework is implemented in a tool called RATAN. We illustrate by an example how RATAN can be used in an embedded system design. © 1999 ACM.

关键词： Algorithms Average execution rate Concurrent system modeling Design Embedded systems interactive rate violation debugging Performance rate analysis rate constraints Theory

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