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Thermally optimal stop-go scheduling of task graphs with real-time constraints

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2 Author(s)
Kumar, P. ; Comput. Eng. & Networks Lab., ETH Zurich, Zürich, Switzerland ; Thiele, L.

Dynamic thermal management (DTM) techniques to manage the load on a system to avoid thermal hazards are soon becoming mainstream in today's systems. With the increasing percentage of leakage power, switching off the processors is becoming a viable alternative technique to speed scaling. For real-time applications, it is crucial that under such techniques the system still meets the performance constraints. In this paper we study stop-go scheduling to minimize peak temperature when scheduling an application, modeled as a task-graph, within a given makespan constraint. For a given static-ordering of execution of the tasks, we derive the optimal schedule referred to as the JUST schedule. We prove that for periodic task-graphs, the optimal temperature is independent of the chosen static-ordering when following the proposed JUST schedule. Simulation experiments validate the theoretical results.

Published in:

Design Automation Conference (ASP-DAC), 2011 16th Asia and South Pacific

Date of Conference:

25-28 Jan. 2011

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