Re: [RFC PATCH 0/3] Aggregate task utilization only on root cfs_rq

From: Dietmar Eggemann
Date: Thu Jun 02 2016 - 11:40:55 EST

On 01/06/16 21:10, Peter Zijlstra wrote:
> On Wed, Jun 01, 2016 at 08:39:19PM +0100, Dietmar Eggemann wrote:
>> This is an alternative approach to '[RFC PATCH v2] sched: reflect
>> sched_entity movement into task_group's utilization' which requires
>> '[RFC PATCH] sched: fix hierarchical order in rq->leaf_cfs_rq_list'
> Awesome, a 3rd alternative :-)

Yeah, sorry, but at least it runs op tip/sched/core w/o any other PELT
related changes.

Moreover, it's less code changes compared to the reflect-thing.

And Yuyang's implementation depended on the optimization of
_update_load_avg() (1us->1ms) which IMHO turned out to be not working.