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Low-Overhead Online Assessment of Timely Progress as a System Commodity

Authors Weifan Chen , Ivan Izhbirdeev, Denis Hoornaert , Shahin Roozkhosh , Patrick Carpanedo, Sanskriti Sharma, Renato Mancuso

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Author Details

Weifan Chen
  • Boston University, MA, USA
Ivan Izhbirdeev
  • Boston University, MA, USA
Denis Hoornaert
  • Technische Universität München, Germany
Shahin Roozkhosh
  • Boston University, MA, USA
Patrick Carpanedo
  • Boston University, MA, USA
Sanskriti Sharma
  • Boston University, MA, USA
Renato Mancuso
  • Boston University, MA, USA

Funding

  • Hoornaert, Denis: Denis Hoornaert was supported by the Chair for Cyber-Physical Systems in Production Engineering at TUM and the Alexander von Humboldt Foundation.
  • Mancuso, Renato: The material presented in this paper is based upon work supported by the National Science Foundation (NSF) under grants number CCF-2008799 and CNS-2238476.

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Weifan Chen, Ivan Izhbirdeev, Denis Hoornaert, Shahin Roozkhosh, Patrick Carpanedo, Sanskriti Sharma, and Renato Mancuso. Low-Overhead Online Assessment of Timely Progress as a System Commodity. In 35th Euromicro Conference on Real-Time Systems (ECRTS 2023). Leibniz International Proceedings in Informatics (LIPIcs), Volume 262, pp. 13:1-13:26, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2023)
https://doi.org/10.4230/LIPIcs.ECRTS.2023.13

Abstract

The correctness of safety-critical systems depends on both their logical and temporal behavior. Control-flow integrity (CFI) is a well-established and understood technique to safeguard the logical flow of safety-critical applications. But unfortunately, no established methodologies exist for the complementary problem of detecting violations of control flow timeliness. Worse yet, the latter dimension, which we term Timely Progress Integrity (TPI), is increasingly more jeopardized as the complexity of our embedded systems continues to soar. As key resources of the memory hierarchy become shared by several CPUs and accelerators, they become hard-to-analyze performance bottlenecks. And the precise interplay between software and hardware components becomes hard to predict and reason about. How to restore control over timely progress integrity? We postulate that the first stepping stone toward TPI is to develop methodologies for Timely Progress Assessment (TPA). TPA refers to the ability of a system to live-monitor the positive/negative slack - with respect to a known reference - at key milestones throughout an application’s lifespan. In this paper, we propose one such methodology that goes under the name of Milestone-Based Timely Progress Assessment or MB-TPA, for short. Among the key design principles of MB-TPA is the ability to operate on black-box binary executables with near-zero time overhead and implementable on commercial platforms. To prove its feasibility and effectiveness, we propose and evaluate a full-stack implementation called Timely Progress Assessment with 0 Overhead (TPAw0v). We demonstrate its capability in providing live TPA for complex vision applications while introducing less than 0.6% time overhead for applications under test. Finally, we demonstrate one use case where TPA information is used to restore TPI in the presence of temporal interference over shared memory resources.

Subject Classification

ACM Subject Classification
  • Computer systems organization → Real-time systems
Keywords
  • progress-aware regulation
  • hardware assisted runtime monitoring
  • timing annotation
  • control flow graph

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