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Abstract : |
c. keo. ac. j p> One characteristic of continuous media is that they should be processed both continuously and periodically. Although "periodic ex'ecution models " are suitable for such processing, most ex'isting periodic models do not take account of resource reservation and adaptation (QOS control) in themselves, and such resource man-agement must be performed through some ex'ternal mechanism. In this paper, we propose a new processex 'ecution model, named "Q-Thread, " that incotTorates such continuous-media support. By using a QThread, a user can specify the tolerable ranges of the period and computation time for periodic invocations, and can easily write a continuous-media session that controls the (]OS dynamically. The Q-Thread ex'eculion model has been implemented on RT-Mach, and dynamic (]OS-control ex'periments have been carried out with this prototype. Keywords: Process-execution model, dynamic QOS control, continuous media, resource management, |
