Optimal safety partition design for integrated core processor under dynamical priority

During the research on the application of partition management model into avionic integrated core processor (ICP), the reasonable partition parameters design is an important factor to ensure the mission-critical and safety-critical guarantee for the whole system. Based on the standard model, the extended model that the upper scheduler adopts the dynamical priority scheduling strategy was proposed. Through observing partition behavior during the processing busy period, the worst-case preemptive effect calculating algorithm for any given requested time length was obtained, which explains the atomic preemption behavior under the dynamical priority in detail from a more microscopic aspect. By calculating the task load for task set and considering the preemptive influence caused by the requested time length which extends to the last partition execution window for the task load, the safe partition parameters design solutions were also established for the priority based scheduling strategy in the lower scheduler. The simulation experiment shows that the safe partition parameters design algorithms have a higher efficiency than the virtual processing resource method.