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Task Prioritization in Multi-media Consumer Terminals

Assign priorities to tasks considering application main of multi-media consumer terminals. Tasks only block on input/output in situation (a) and video decoder may block on VLD in situation (b). Questions: Propose task priorities for both situations and provide justification.

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Task Prioritization in Multi-media Consumer Terminals

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  1. Reinder J. Bril, r.j.bril@tue.nl TU/e Informatica, System Architecture and Networking Exercise • Assigning priorities to tasks • Description:Consider the application main of the multi-media consumer terminal (see, e.g. slide 17 of the examples), and the following two situations. (a)All tasks only block on their input or output, but never on any other hardware resource. (b)As a refinement of (a), the video decoder may block on a VLD (variable length decoder). It typically blocks multiple times on the VLD during the processing of a single frame. Assume RMS of the tasks of main. • Questions: • Propose an assignment of (relative) priorities to the tasks of main for situation (a), and motivate it. • Similar for situation (b).

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