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The BPF extensible scheduler class
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The BPF extensible scheduler class
[Posted November 30, 2022 by corbet]
It was only a matter of time before somebody found a way to inject BPF into
the CPU scheduler. This patch
series, posted by Tejun Heo and containing work by David Vernet, Josh
Don, and Barret Rhoden, does exactly that. The cover letter covers the
motivation behind this work in detail:
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One of our main goals was to lower the barrier to entry for experimenting with the scheduler. sched_ext provides ergonomic callbacks and helpers to ease common operations such as managing idle CPUs, scheduling tasks on arbitrary CPUs, handling preemptions from other scheduling classes, and more. While sched_ext does require some ramp-up, the complexity is self-contained, and the learning curve gradual. Developers can ramp up by first implementing simple policies such as global FIFO in only tens of lines of code, and then continue to learn the APIs and building blocks available with sched_ext as they build more featureful and complex schedulers.
There is a bit more documentation in this patch.
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The BPF extensible scheduler class
Posted Nov 30, 2022 13:25 UTC (Wed) by dullfire (subscriber, #111432) [Link]
I first read "featureful" as "fearful". Upon further reflection, I suspect this will often (but not always) be an acceptable substitution.
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