On Mon, Jul 22, 2019 at 01:33:37PM -0400, Rik van Riel wrote: > The runnable_load magic is used to quickly propagate information about > runnable tasks up the hierarchy of runqueues. The runnable_load_avg is > mostly used for the load balancing code, which only examines the value at > the root cfs_rq. > > Redefine the root cfs_rq runnable_load_avg to be the sum of task_h_loads > of the runnable tasks. This works because the hierarchical runnable_load of > a task is already equal to the task_se_h_load today. This provides enough > information to the load balancer. > > The runnable_load_avg of the cgroup cfs_rqs does not appear to be > used for anything, so don't bother calculating those. > > This removes one of the things that the code currently traverses the > cgroup hierarchy for, and getting rid of it brings us one step closer > to a flat runqueue for the CPU controller.
Nice!
