2002 | OriginalPaper | Buchkapitel
Power Estimation of a C Algorithm Based on the Functional-Level Power Analysis of a Digital Signal Processor
verfasst von : Nathalie Julien, Johann Laurent, Eric Senn, Eric Martin
Erschienen in: High Performance Computing
Verlag: Springer Berlin Heidelberg
Enthalten in: Professional Book Archive
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A complete methodology to estimate power consumption at the C-level for on-the-shelf processors is introduced. It relies on the Functional-Level Power Analysis, which results in a power model of the processor that describes the consumption variations relatively to algorithmic and configuration parameters. Some parameters can be predicted directly from the C-algorithm with simple assumptions on the compilation. Maximum and minimum bounds for power consumption are obtained, together with a very accurate estimation; for the TI C6x, a maximum error of 6% against measurements is obtained for classical digital signal processing algorithms. Estimation results are summarized on a consumption map; the designer can compare the algorithm consumption, and its variations, with the application constraints.