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As multicore platforms become ever larger, overhead-related factors play a greater role in determining which real-time scheduling algorithms are preferable. In this paper, such factors are investigated through an empirical comparison of global, partitioned, and clustered EDF scheduling algorithms on a 24-core Intel system. On this platform, global EDF proved to be a non-viable choice for hard real-time systems, while clusters of size six practically approximated global approaches. For soft real-time systems, clustered EDF scheduling algorithms proved to be particularly effective.
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