SCHED_DEADLINE To Be Added To Linux 3.14 Kernel
Written by Michael Larabel in Linux Kernel on 20 January 2014 at 11:56 AM EST. 15 Comments
Less than 24 hours after the Linux 3.13 kernel release there's already interesting Git pull requests submitted for Linux 3.14.

The first 3.14 pull request worth pointing out on Phoronix are the scheduler changes sent in by Ingo Molnar. The most notable change with this pull is the initial implementation of SCHED_DEADLINE. SCHED_DEADLINE is a new CPU scheduler for the Linux kernel that's been in development for several years and has undergone numerous revisions. SCHED_DEADLINE implements the Earliest Deadline First (EDF) scheduling algorithm.

Ingo's Git pull explains its 3.14 state, "a real-time scheduling policy where tasks that meet their deadlines and periodically execute their instances in less than their runtime quota see real-time scheduling and won't miss any of their deadlines. Tasks that go over their quota get delayed. (Available to privileged users for now.)"

For those unfamiliar with the work that's been ongoing for the SCHED_DEADLINE CPU scheduler there's in-depth explanations via Wikipedia and other sites.

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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 10,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter or contacted via

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