On Tue, May 16, 2017 at 06:02:17PM -0400, Tejun Heo wrote: > 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/20170505154117.6zldxuki2fgyo...@hirez.programming.kicks-ass.net > > > > 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.
Josef reported some problems with these patches and narrowed it down to: "sched/fair: Remove se->load.weight from se->avg.load_sum" I'm currently stuck chasing a regression in other code, but I'll try and get back to this shortly.
