Re: [RFC][PATCH 00/14] sched/fair: A bit of a cgroup/PELT overhaul (again)..

[Tejun Heo]

Hello,

On Fri, May 12, 2017 at 06:44:16PM +0200, Peter Zijlstra wrote:
> 
> Hi all,
> 
> So after staring at all that PELT stuff and working my way through it again:
> 
>   https://lkml.kernel.org/r/20170505154117.6zldxuki2fgyo53n@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
> 
> I started doing some patches to fix some of the identified broken.
> 
> So here are a few too many patches that do:
> 
>  - fix 'reweight_entity' to instantly propagate the change in se->load.weight.
> 
>  - rewrite/fix the propagate on migrate (attach/detach)
> 
>  - introduce the hierarchical runnable_load_avg, as proposed by Tejun.
> 
>  - synchronous detach for runnable migrates
> 
>  - aligns the PELT windows between a cfs_rq and all its se's
> 
>  - deals with random fallout from the above (some of this needs folding back
>    and reordering, but its all well past the point I should post this anyway).

The schbench results look good here.  I'll put it under more realistic
test tomorrow and see how it performs.

Thanks.

-- 
tejun