Overview of the Current Approaches to Enhance the Linux Scheduler

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" summary

Argues that a power-aware scheduler, driven by per-entity load tracking and using percentage utilization instead of nr_running, actually consolidates threads into power domains so whole sockets can sleep. Implements the policy on two-socket, 8-cores-per-socket x86 and POWER SMT4 machines and tests with ebusy/Kernel-bench: consolidation holds until socket capacity and yields measurable power savings (normalized against default scheduler). Behavior falls back to default when queues deepen; concerns remain about NUMA/cache churn and the need for broad regression testing.

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" chapters (11)

1. 0:00Introduction to Linux scheduler
2. 1:30Scheduler goals and architecture
3. 4:43Power-aware scheduling concept
4. 7:14Load balancing and race to idle
5. 11:06Utilization metrics
6. 16:42Task behavior analysis
7. 21:01Per-entity load tracking
8. 27:28Mainline integration challenges
9. 30:15Experimental results
10. 33:31Future power efficiency efforts
11. 35:41Q&A and closing discussion