CPU Controller on a Single Runqueue

Explore a new design for the cgroups CPU controller in the Linux scheduler presented at the Linux Plumbers Conference. Dive into the implementation of a single runqueue system that scales vruntime by the inverse of task priority, aiming to reduce complexity and overhead in frequently scheduling workloads. Learn about the flat runqueue structure, runtime calculations, scheduling mechanisms, and load management. Compare this approach to the current CPU controller and cgroup implementation. Examine potential pitfalls, performance results, and draw conclusions on the effectiveness of this innovative scheduler design.