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Energy-aware scheduling under reliability and makespan constraints

Guillaume Aupy 1, 2 Anne Benoit 1, 2 Yves Robert 1, 2
Abstract : We consider a task graph mapped on a set of homogeneous processors. We aim at minimizing the energy consumption while enforcing two constraints: a prescribed bound on the execution time (or makespan), and a reliability threshold. Dynamic voltage and frequency scaling (DVFS) is an approach frequently used to reduce the energy consumption of a schedule, but slowing down the execution of a task to save energy is decreasing the reliability of the execution. In this work, to improve the reliability of a schedule while reducing the energy consumption, we allow for the re-execution of some tasks. We assess the complexity of the tri-criteria scheduling problem (makespan, reliability, energy) of deciding which task to re-execute, and at which speed each execution of a task should be done, with two different speed models: either processors can have arbitrary speeds (continuous model), or a processor can run at a finite number of different speeds and change its speed during a computation (VDD model). We propose several novel tri-criteria scheduling heuristics under the continuous speed model, and we evaluate them through a set of simulations. The two best heuristics turn out to be very efficient and complementary.
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Submitted on : Tuesday, September 3, 2013 - 11:36:51 AM
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Guillaume Aupy, Anne Benoit, Yves Robert. Energy-aware scheduling under reliability and makespan constraints. International Conference on High Performance Computing (HiPC'2012), Dec 2012, Pune, India. pp.1-10, ⟨10.1109/HiPC.2012.6507482⟩. ⟨hal-00763384⟩



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