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From: Peter Zijlstra <peterz@infradead.org>
To: mingo@kernel.org, linux-kernel@vger.kernel.org, tj@kernel.org,
	josef@toxicpanda.com
Cc: torvalds@linux-foundation.org, vincent.guittot@linaro.org,
	efault@gmx.de, pjt@google.com, clm@fb.com,
	dietmar.eggemann@arm.com, morten.rasmussen@arm.com,
	bsegall@google.com, yuyang.du@intel.com, peterz@infradead.org
Subject: [PATCH -v2 00/18] sched/fair: A bit of a cgroup/PELT overhaul
Date: Fri, 01 Sep 2017 15:20:59 +0200	[thread overview]
Message-ID: <20170901132059.342024223@infradead.org> (raw)

Hi all,

New this time is that Josef identified and fixed a problem he had with it. He
also provided many compile fixes. Meanwhile I managed to reflow the patches so
that the whole now looks like a normal patch series.

Other than that, it should still very much be what it was before.. From the
previous announce:

---

So after staring at all that PELT stuff and working my way through it again:

  https://lkml.kernel.org/r/20170505154117.6zldxuki2fgyo53n@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).


IIRC pjt recently mentioned the reweight_entity thing, and I have very vague
memories he once talked about the window alignment thing -- which I only
remembered after (very painfully) having discovered I really needed that.

In any case, the reason I did the reweight_entity thing first, is because I
feel that is the right place to also propagate the hierarchical runnable_load,
as that is the natural place where a group's cfs_rq is coupled to its
sched_entity.

And the hierachical runnable_load needs that coupling. TJ did it by hijacking
the attach/detach migrate code, which I didn't much like.  In any case, all
that got me looking at said attach/detach migrate code and find pain. So I went
and fixed that too.

---

Still very many thanks to Vincent, Dietmar and Josef for poking at these patches.

If nothing untowards happens, I plan to get them merged after the immenent
merge window.

             reply	other threads:[~2017-09-01 13:37 UTC|newest]

Thread overview: 57+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2017-09-01 13:20 Peter Zijlstra [this message]
2017-09-01 13:21 ` [PATCH -v2 01/18] sched/fair: Clean up calc_cfs_shares() Peter Zijlstra
2017-09-01 13:21 ` [PATCH -v2 02/18] sched/fair: Add comment to calc_cfs_shares() Peter Zijlstra
2017-09-28 10:03   ` Morten Rasmussen
2017-09-29 11:35     ` Peter Zijlstra
2017-09-29 13:03       ` Morten Rasmussen
2017-09-01 13:21 ` [PATCH -v2 03/18] sched/fair: Cure calc_cfs_shares() vs reweight_entity() Peter Zijlstra
2017-09-29  9:04   ` Morten Rasmussen
2017-09-29 11:38     ` Peter Zijlstra
2017-09-29 13:00       ` Morten Rasmussen
2017-09-01 13:21 ` [PATCH -v2 04/18] sched/fair: Remove se->load.weight from se->avg.load_sum Peter Zijlstra
2017-09-29 15:26   ` Morten Rasmussen
2017-09-29 16:39     ` Peter Zijlstra
2017-09-01 13:21 ` [PATCH -v2 05/18] sched/fair: Change update_load_avg() arguments Peter Zijlstra
2017-09-01 13:21 ` [PATCH -v2 06/18] sched/fair: Move enqueue migrate handling Peter Zijlstra
2017-09-01 13:21 ` [PATCH -v2 07/18] sched/fair: Rename {en,de}queue_entity_load_avg() Peter Zijlstra
2017-09-01 13:21 ` [PATCH -v2 08/18] sched/fair: Introduce {en,de}queue_load_avg() Peter Zijlstra
2017-09-01 13:21 ` [PATCH -v2 09/18] sched/fair: More accurate reweight_entity() Peter Zijlstra
2017-09-01 13:21 ` [PATCH -v2 10/18] sched/fair: Use reweight_entity() for set_user_nice() Peter Zijlstra
2017-09-01 13:21 ` [PATCH -v2 11/18] sched/fair: Rewrite cfs_rq->removed_*avg Peter Zijlstra
2017-09-01 13:21 ` [PATCH -v2 12/18] sched/fair: Rewrite PELT migration propagation Peter Zijlstra
2017-10-09  8:08   ` Morten Rasmussen
2017-10-09  9:45     ` Peter Zijlstra
2017-10-18 12:45       ` Morten Rasmussen
2017-10-30 13:35         ` Peter Zijlstra
2017-10-09 15:03   ` Vincent Guittot
2017-10-09 15:29     ` Vincent Guittot
2017-10-10  7:29       ` Peter Zijlstra
2017-10-10  7:44         ` Vincent Guittot
2017-10-13 15:22           ` Vincent Guittot
2017-10-13 20:41             ` Peter Zijlstra
2017-10-15 12:01               ` Vincent Guittot
2017-10-16 13:55               ` Vincent Guittot
2017-10-19 15:04                 ` Vincent Guittot
2017-10-30 17:20                   ` Peter Zijlstra
2017-10-31 11:14                     ` Vincent Guittot
2017-10-31 15:01                       ` Peter Zijlstra
2017-10-31 16:38                         ` Vincent Guittot
2017-11-16 14:09                         ` [PATCH v3] sched: Update runnable propagation rule Vincent Guittot
2017-11-16 14:21                           ` [PATCH v4] " Vincent Guittot
2017-12-06 11:40                             ` Peter Zijlstra
2017-12-06 17:10                               ` Ingo Molnar
2017-12-06 20:29                             ` [tip:sched/core] sched/fair: Update and fix the " tip-bot for Vincent Guittot
2017-09-01 13:21 ` [PATCH -v2 13/18] sched/fair: Propagate an effective runnable_load_avg Peter Zijlstra
2017-10-02 17:46   ` Dietmar Eggemann
2017-10-03  8:50     ` Peter Zijlstra
2017-10-03  9:29       ` Dietmar Eggemann
2017-10-03 12:26   ` Dietmar Eggemann
2017-09-01 13:21 ` [PATCH -v2 14/18] sched/fair: Synchonous PELT detach on load-balance migrate Peter Zijlstra
2017-09-01 13:21 ` [PATCH -v2 15/18] sched/fair: Align PELT windows between cfs_rq and its se Peter Zijlstra
2017-10-04 19:27   ` Dietmar Eggemann
2017-10-06 13:02     ` Peter Zijlstra
2017-10-09 12:15       ` Dietmar Eggemann
2017-10-09 12:19         ` Peter Zijlstra
2017-09-01 13:21 ` [PATCH -v2 16/18] sched/fair: More accurate async detach Peter Zijlstra
2017-09-01 13:21 ` [PATCH -v2 17/18] sched/fair: Calculate runnable_weight slightly differently Peter Zijlstra
2017-09-01 13:21 ` [PATCH -v2 18/18] sched/fair: Update calc_group_*() comments Peter Zijlstra

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