Many safety-critical embedded systems are subject to certification requirements; some systems may be required to meet multiple sets of certification requirements, from different certification authorities. Certification requirements in such "mixed-criticality" systems give rise to some interesting scheduling problems, that cannot be satisfactorily addressed using techniques from conventional scheduling theory. In this paper, we propose a formal model for representing such mixed-criticality workloads. We demonstrate the intractability of determining whether a system specified in this model can be scheduled to meet all its certification requirements. For dual-criticality systems-systems subject to two sets of certification requirements-we quantify, via the metric of processor speedup factor, the effectiveness of 2 techniques (reservation-based scheduling and priority-based scheduling) that are widely used in scheduling such mixed-criticality systems. © 2010 IEEE.
|Title of host publication||Proceedings of the 16th IEEE Real-Time and Embedded Technology and Applications Symposium|
|Place of Publication||Stockholm|
|Publication status||Published - 2010|
|Event||16th IEEE Real-Time and Embedded Technology and Applications Symposium, Stockholm, Sweden - Stockholm|
Duration: 12 Apr 2010 → 15 Apr 2010
|Conference||16th IEEE Real-Time and Embedded Technology and Applications Symposium, Stockholm, Sweden|
|Period||12/04/10 → 15/04/10|