The 2020 Power Management and Scheduling in the Linux Kernel Summit

The Power Management and Scheduling in the Linux Kernel Summit brings together kernel developers with an interest in both CPU scheduling and power management to discuss the intersection of those two areas. It is traditionally held in Pisa, Italy, but world events have interfered with that plan in 2020. So the event was planned for May 11 to 19 on LWN's BigBlueButton server instead. The good news is that this made travel to the event easy; the downside is that, even though the schedule was adjusted to accommodate attendees from outside Europe, it still involved getting up early enough to cause a sort of virtual jet lag.

Discussions held at this event include:

• Core scheduling: this work is getting closer to being ready to merge; what remains to be done?
• The weighted TEO cpuidle governor: an attempt to improve idle-time predictions.
• Testing scheduler thermal properties for avionics: an in-progress test bed to evaluate thermally-oriented scheduler changes.
• Utilization inversion and proxy execution: using load tracking for task placement can lead to some strange inversion situations; fixing them may not be entirely easy.
• The many faces of "latency nice": a complex and inclusive session on an incompletely designed feature.
• Scheduler benchmarking with MMTests: a test suite developed for memory-management benchmarking finds a new use case.
• Evaluating vendor changes to the scheduler: mobile vendors make a lot of tweaks to the CPU scheduler; why do they do that and what is gained from it?
• Bao: a lightweight partitioning hypervisor for mixed-criticality workloads.
• The pseudo cpuidle driver: a development tool for cpuidle governors.
• Saving frequency scaling in the data center: a call for a different compromise between performance and power efficiency.
• The deadline scheduler and CPU idle states: an unlikely combination of technologies that just might make sense.
• Imbalance detection and fairness in the CPU scheduler: how do you balance a workload that cannot be balanced?
• Hibernation in the cloud: an unlikely combination of technologies might just make sense.

The virtual setting of this conference made the traditional group photo impossible; instead, here is an attempt at a group screenshot:

Reporting from the 2020 event is now complete; many thanks to the OSPM organizers for putting together a productive and interesting event.

[Thanks to the Linux Foundation, LWN's travel sponsor, for supporting our coverage of this event.]

Index entries for this article
Conference	OS-Directed Power-Management Summit/2020

---

to post comments