By M. Teresa Higuera-Toledano, Uwe Brinkschulte, Achim Rettberg
This e-book describes the rising box of self-organizing, multicore, dispensed and real-time embedded structures. Self
‐organization of either and software program could be a key strategy to deal with the turning out to be complexity of recent computing structures. dispensed structures operating 1000's of projects on dozens of processors, each one outfitted with a number of cores, calls for self‐organization rules to make sure effective and trustworthy operation. This publication addresses a number of, so-called Self‐X good points resembling self-configuration, self‐optimization, self‐adaptation, self‐healing and self‐protection.
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Extra resources for Self-Organization in Embedded Real-Time Systems
Alert messages), medium for messages which are critical Power-on start-up nominal safe degraded low power Fig. 3 State machine of the MT middleware 36 A. Bondavalli et al. , messages to signal the alert termination), and low for messages which do not impact availability and safety requirements. In Low Power state, level low messages are not exchanged anymore. From Low Power state, an MT can only move to Safe state or being switched off (there are no procedures for online battery replacing). In Nominal state, the MT is fully operative.
C(t)). MinTime and maxTime are based on the synchronization uncertainty provided by the internal mechanisms of R&SAClock. From the perspective of an MT process interested in timeliness of services, the main expectations from the R&SAClock are the following: (i) a request for the time value should be satisfied quickly, and (ii) the enriched time value should include the true time. These can be more formally expressed as: REQ1. The service response time provided by R&SAClock is bounded: there exists a maximum reply time ΔRT from a getTime request made by a user to the delivery of the enriched time value (the probability that the getTime is not provided within ΔRT is negligible).
The network becomes unavailable). In the context of ALARP, the R&SAClock is matched to the NTP protocol. In what follows, we present basics on time and clocks (see also Fig. 5), necessary to introduce the R&SAClock, a brief description of the key algorithm implemented, and a sample trace of results collected. Extensive discussions on the insights of the R&SAClock and simulation and experimental results can be found in [8–10]. 40 A. Bondavalli et al. Fig. 5 Basics on time and clocks Basic Notions of Time and Clocks.