Energy-Quality-Time Optimized Task Mapping on DVFS-enabled Multicores

Abstract : Multicore architectures have great potential for energy-constrained embedded systems, such as energy-harvesting wireless sensor networks. Some embedded applications, especially the real-time ones, can be modeled as imprecise computation tasks. A task is divided into a mandatory subtask that provides a baseline Quality-of-Service (QoS) and an optional subtask that refines the result to increase the QoS. Combining dynamic voltage and frequency scaling, task allocation and task adjustment, we can maximize the system QoS under real-time and energy supply constraints. However, the nonlinear and combinatorial nature of this problem makes it difficult to solve. This work first formulates a mixed-integer non-linear programming problem to concurrently carry out task-to-processor allocation, frequencyto- task assignment and optional task adjustment. We provide a mixed-integer linear programming form of this formulation without performance degradation and we propose a novel decomposition algorithm to provide an optimal solution with reduced computation time compared to state-of-the-art optimal approaches (22.6% in average). We also propose a heuristic version that has negligible computation time
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https://hal.inria.fr/hal-01941764
Contributor : Olivier Sentieys <>
Submitted on : Sunday, December 2, 2018 - 11:42:57 AM
Last modification on : Friday, September 13, 2019 - 9:49:43 AM
Long-term archiving on: Sunday, March 3, 2019 - 1:21:15 PM

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  • HAL Id : hal-01941764, version 1

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Lei Mo, Angeliki Kritikakou, Olivier Sentieys. Energy-Quality-Time Optimized Task Mapping on DVFS-enabled Multicores. ESWEEK 2018 - Embedded Systems Week, Sep 2018, Torino, Italy. pp.1-11. ⟨hal-01941764⟩

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