Some real systems usually drive themselves into a critical state. These systems are said to be in a state of selforganized criticality [1]. The theory of self-organized criticality aims to describe interactive, dissipative and self sustaining systems with many degrees of freedom. Hence it complements the chaos concept. These systems are characterized by power law statistics. Self-organized crit...

This paper specifies and describes GMCB (Generic Mixed-Criticality Benchmark), a benchmark industrial application model for testing real-time mixed-criticality multicore systems incorporating a network-on-chip (NoC). Task execution information such as periods, latencies and criticality levels is specified. The communication patterns between the tasks are defined, incorporating message sizes tra...

In mixed-criticality systems, applications with different levels of criticality are integrated on the same computational platform. Without a proper isolation of the different applications of such a mixed-criticality system certification gets expensive, because it has to be shown that application components of lower criticality do not hamper the correct operation of the critical applications. Th...

Unending quest for performance improvement coupled with the advancements in integrated circuit technology have led to the development of new architectural paradigm. Speculative multithreaded architecture (SpMT) philosophy relies on aggressive speculative execution for improved performance. However, aggressive speculative execution comes with a mixed flavor of improving performance, when success...

The design of mixed-criticality systems often involves painful tradeoffs between safety guarantees and performance. However, the use of more detailed architectural models in the design and analysis of scheduling arrangements for mixed-criticality systems can provide greater confidence in the analysis, but also opportunities for better performance. Motivated by this view, we propose an extension...

Enabling computer tasks with different levels of criticality running on a common hardware platform has been an increasingly important trend in the design of real-time and embedded systems. On such systems, a real-time task may exhibit different WCETs (Worst Case Execution Times) in different criticality modes. It has been well-known that traditional realtime scheduling methods are not applicabl...

Mission-critical multimedia applications such m advanced command and control are dynamic and criticality driven. Taking into consideration of the application criticality as well as media quality-ofsewice (QoS} ar$ timing requirements, we develop a multiresource management system that enables criticality-based resource preemption and QoS-based dynamic resource negotiation and adaptation. Our pee...

In this paper we summarise, and attempt to unify, the many descriptions that have been published on general mode changes. We then use this summary to position the criticality mode change. We conclude that a criticality mode change (from low to high) is closest in nature to a (graceful) degradation mode change following (partial) system failure. However, a criticality mode change (from high to l...

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 sch...

In this paper we are interested in securitysensitive mixed-criticality real-time systems. Existing researches on mixed-criticality systems usually are safety-oriented, which seriously ignore the security requirements. We firstly establish the system model to capture security-critical applications in mixed-criticality systems. Higher security-criticality protection always results in significant ...