Behavioral Intervals in Embedded Software: Timing and Power by Fabian Wolf PDF

By Fabian Wolf

Behavioral periods in Embedded Software introduces a entire method of timing, energy, and communique research of embedded software program tactics. Embedded software program timing, strength and verbal exchange are usually now not distinct yet take place in periods which consequence from info based habit, atmosphere timing and aim approach properties.

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Extra info for Behavioral Intervals in Embedded Software: Timing and Power Analysis of Embedded Real-Time Software Processes

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Every control structure including the loops is analyzed separately, so the result is very conservative because dependencies of control structures or overlapping basic block execution are not exploited. The designer is given the possibility to bound loops using an interactive editor. In the newer approach by Puschner and Schedl [106], the MARS-C approach is extended by an ILP based program path analysis like in [75]. It implies the same problems based on the analysis granularity of basic blocks when overlapping basic block effects for state-of-the-art processors are present.

In the following, the focus is on the methodologies introducing significantly new aspects that contribute to the state-of-the-art in program path analysis while different architecture modeling techniques for basic blocks are not considered. 3. 1 Branching Probabilities As an alternative approach to explicit or implicit path enumeration, the approach by Gong, Gajski and Narayan [32] can partially consider false paths because the user can specify the branching probabilities instead of false or feasible paths.

156]). It can be used for running time as well as for power consumption analysis [131]. The approach is reviewed using the general term execution cost instead of running time. 1 Functional Constraints Let a program consist of N basic blocks with x; execution count of basic block bb; and c; execution cost (running time or power consumption). Then, the sum-of-basic-blocks model defines for its process-level execution cost interval: 16 BEHAVIORAL INTERVALS IN EMBEDDED SOFTWARE In implicit path enumeration, the execution count Xi is constrained by linear equations provided by the designer.

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