March 26 – 31 , 2017, Dagstuhl Seminar 17131

Mixed Criticality on Multicore / Manycore Platforms


Sanjoy K. Baruah (University of North Carolina at Chapel Hill, US)
Liliana Cucu-Grosjean (INRIA – Paris, FR)
Robert Davis (University of York, GB)
Zo Stephenson (Rapita Systems Ltd. – York, GB)

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The Mixed Criticality Systems (MCS) have become an important topic in the real-time systems community. The first cluster of the European collaborative projects on Mixed Criticality will reach its end in September 2016 indicating quick maturing of the related concepts within the industry and academia. Nevertheless we consider that many of the challenges brought about by the integration of mixed criticality applications onto multicore and manycore architectures are still there. In reality the Mixed Criticality problems have inherited the difficulty of real-time systems: being at the frontier of several domains like real-time scheduling, real-time operating systems / runtime environments, timing analysis as well as hardware architectures. This seminar aims to promote lively interaction, cross fertilisation of ideas, synergies, and closer collaboration across different MCS communities. The seminar will attract industrialists from the aerospace and automotive industries with specific interest in MCS.

In common with the previous Dagstuhl Seminar on Mixed Criticality Systems (MCS), this seminar will focus on the two key conflicting requirements of MCS: separation between criticality levels for assurance and sharing for resource efficiency, along with the related requirement of time composability. The seminar will crucially span from the low level behaviour of the memory hierarchy, and network-on-chip or buses, through timing analysis (WCET) and delays relating to pre-emption and migration (CRPD), real-time operating system (RTOS) behaviour, and high level scheduling, and task allocation to the verification of end-to-end deadlines.

An important aspect of the seminar involves obtaining different industry perspectives on the key problems and considerations in building future mixed criticality real-time systems. These perspectives will help to ground the research questions that are addressed, ensuring that the solutions developed are of value to industry.

The sessions of the seminar will be structured around a set of themes. Particular attention will be paid to the interfaces between themes, as these are the areas that can most benefit from improved understanding and collaboration. We aim to promote a holistic approach to solving the problems of MCS.

  • Task and system models for MCS on multicore and manycore platforms, including use of the various resources (memory, interconnect) in addition to the processors.
  • Scheduling schemes and analyses for MCS, including the integration of appropriate models of overheads and delays.
  • Run-time environments and support for MCS, including data exchange and synchronisation across criticality levels, and issues relating to consistency of the criticality mode.
  • Analysis of worst-case execution times (WCET) relating to MCS on multicore and manycore platforms, including cache related pre-emption and migration delays.
  • Mixed criticality communications mechanisms and analysis, including Network-on-Chip support.
  • Probabilistic analysis techniques for MCS.

The seminar does not aim to cover security aspects that relate to some MCS. It aims to be cognisant of the needs for certification in some industries, but does not seek to address the certification process itself. As a result of feedback from the 1st seminar suggesting stronger industrial involvement, the seminar will include a series of talks by industrial speakers.

  Creative Commons BY 3.0 DE
  Sanjoy K. Baruah and Liliana Cucu-Grosjean and Robert Davis and Zo Stephenson and Benot Triquet

Related Dagstuhl Seminar


  • Optimization / Scheduling
  • Semantics / Formal Methods
  • Verification / Logic


  • Real-time systems
  • Mixed-criticality
  • Multi- and many-cores

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