Evaluating Dynamic Task Scheduling in a Task-Based Runtime System for Heterogeneous Architectures

  • Thomas BeckerEmail author
  • Wolfgang Karl
  • Tobias Schüle
Conference paper
Part of the Lecture Notes in Computer Science book series (LNCS, volume 11479)


Heterogeneous parallel architectures present many challenges to application developers. One of the most important ones is the decision where to execute a specific task. As today’s systems are often dynamic in nature, this cannot be solved at design time. A solution is offered by runtime systems that employ dynamic scheduling algorithms. Still, the question which algorithm to use remains.

In this paper, we evaluate several dynamic scheduling algorithms on a real system using different benchmarks. To be able to use the algorithms on a real system, we integrate them into a task-based runtime system. The evaluation covers different heuristic classes: In immediate mode, tasks are scheduled in the order they arrive in the system, whereas in batch mode, all ready-to-execute tasks are considered during the scheduling decision. The results show that the Minimum Completion Time and the Min-Min heuristics achieve the overall best makespans. However, if additionally scheduling fairness has to be considered as optimization goal, the Sufferage algorithm seems to be the algorithm of choice.


Dynamic task scheduling Heterogeneous architectures 


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© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Karlsruhe Institute of TechnologyKarlsruheGermany
  2. 2.Siemens AGCorporate TechnologyMunichGermany

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