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Feasibility Analysis of Conditional DAG Tasks

Authors Sanjoy Baruah, Alberto Marchetti-Spaccamela

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Author Details

Sanjoy Baruah
  • Washington University in Saint Louis, MO, USA
Alberto Marchetti-Spaccamela
  • La Sapienza University, Rome, Italy

Funding

  • Baruah, Sanjoy: National Science Foundation Grants CNS-1814739 and CPS-1932530.

Cite As Get BibTex

Sanjoy Baruah and Alberto Marchetti-Spaccamela. Feasibility Analysis of Conditional DAG Tasks. In 33rd Euromicro Conference on Real-Time Systems (ECRTS 2021). Leibniz International Proceedings in Informatics (LIPIcs), Volume 196, pp. 12:1-12:17, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2021) https://doi.org/10.4230/LIPIcs.ECRTS.2021.12

Abstract

Feasibility analysis for Conditional DAG tasks (C-DAGs) upon multiprocessor platforms is shown to be complete for the complexity class pspace. It is shown that as a consequence integer linear programming solvers (ILP solvers) are likely to prove inadequate for such analysis. A demarcation is identified between the feasibility-analysis problems on C-DAGs that are efficiently solvable using ILP solvers and those that are not, by characterizing a restricted class of C-DAGs for which feasibility analysis is shown to be efficiently solvable using ILP solvers.

Subject Classification

ACM Subject Classification
  • Computer systems organization → Embedded and cyber-physical systems
  • Software and its engineering → Real-time schedulability
Keywords
  • Multiprocessor feasibility analysis
  • Conditional Directed Acyclic Graphs
  • PSPACE-complete

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