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Constant bandwidth supply for priority processing

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4 Author(s)
van den Heuvel, M.M.H.P. ; Dept. of Math. & Comput. Sci., Eindhoven Univ. of Technol., Eindhoven, Netherlands ; Holenderski, M. ; Bril, R.J. ; Lukkien, J.J.

Today's consumer electronic devices feature multiple applications which have to share scarcely available resources. We consider a priority-processing-based video application, which comprises multiple scalable video algorithms (SVAs) that are executed on a shared, virtual platform. This application is given a guaranteed processor share by means of a constant-bandwidth server (CBS). A decision scheduler distributes the assigned processor share among the SVAs on a time-slot basis, with the aim to maximize their overall output quality. To correctly distribute this processor share based on fixed-sized time slots, we introduce the concept of a virtual timer. This timer only advances when its associated virtual platform is executing. Because priority processing can guarantee real-time performance even under fluctuating load, we apply a resource reclaiming mechanism to our CBS which makes it possible to efficiently exploit spare processor time.

Published in:

Consumer Electronics, IEEE Transactions on  (Volume:57 ,  Issue: 2 )