Energy-Aware QoS Adjustment of Multimedia Tasks with Uncertain Execution Time

Authors:
Wan Yeon Lee;Heejo Lee;Hyogon Kim
Affiliations:
Hallym University, Chunchon 200-702, South Korea;Korea University, Seoul 136-701, South Korea;Korea University, Seoul 136-701, South Korea
Venue:
ICCS '07 Proceedings of the 7th international conference on Computational Science, Part IV: ICCS 2007
Year:
2007

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Abstract

In order to make the best use of available energy budget, we propose a QoS adjustment method which maximizes the total QoS-provisioning of multimedia tasks with uncertain execution time. This method utilizes the probability distribution of task's execution time to determine an instant QoS level. Our experiments show that the proposed method gives 52% more QoS-provisioning than the conventional method using a constant QoS level derived from the worst-case time.