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A thorough overview of the newest Linux kernel that includes a concise and illuminating explanation of the new process scheduler's innovation as well as the inspiration from Con Kolivas' scheduler:
Con designed a new PS, called RSDL, that killed the interactivity estimation code. Instead, his PS was based on the concept of 'fairness': processes are treated equally and are given same timeslices [ ... ] But CFS includes the sleep time in the task's fairness metric: this means that in CFS, sleeping tasks (the kind of tasks that usually run the code that the user feels as 'interactive', like X.org, mp3 players, etc) do get more CPU time than running tasks (unlike the 'strict fairness' of RSDL, where they are treated with a strict fairness), but it's all kept under control by the fairness engine. This design gets the best of both worlds: fairness and interactivity...
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