Evaluation of an Adaptive Dynamic Voltage Scaling Scheme for Hard Real-Time Applications
In this paper we briefly describe the implementation method for an Adaptive Dynamic Voltage Scaling algorithm which supports a finite number of clock frequencies we then evaluate its performance and finally profile its implementation complexity on a fixed point DSP. The proposed algorithm is an intra-task DVS scheme that calculates the voltage-frequency profile based on the past execution history of the task. Using the Adaptive Multi-Rate speech encoder as an example of a task we show that the overhead imposed by the extra complexity of the algorithm is less than 1% of the speech encoder and gives a power saving of over 15%. We finally conclude the complexity of calculating the voltage–frequency profile is not a limiting factor, if applied to a sufficiently complicated task.
Keywords: ADAPTIVE SYSTEM; AMR; DYNAMIC VOLTAGE SCALING; EMBEDDED; LOW POWER; REAL-TIME SYSTEMS
Document Type: Short Communication
Publication date: 01 August 2007
- The electronic systems that can operate with very low power are of great technological interest. The growing research activity in the field of low power electronics requires a forum for rapid dissemination of important results: Journal of Low Power Electronics (JOLPE) is that international forum which offers scientists and engineers timely, peer-reviewed research in this field.
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