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The Linux kernel is mainly used is general-purpose operating system, i.e., in server and/or desktop environments. During the last years, however, academic institutions and companies showed an increasing interest in using it for real-time and control applications as well. However, since Linux has not been designed to be a real-time operating, the best-effort scheduling policy is not suited to provide high utilization and strong guarantees to time-sensitive tasks. The paper presents an enhancement of the Linux scheduler through the implementation of the well known Earliest Deadline First algorithm for real-time tasks, leaving the current behavior of existing policies unchanged.
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