Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]
Groups > linux.kernel > #1500968
| From | Dietmar Eggemann <dietmar.eggemann@arm.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes |
| Date | 2016-10-14 15:20 +0200 |
| Message-ID | <ssaz0-1Ja-33@gated-at.bofh.it> (permalink) |
| References | (8 earlier) <srQAh-5qL-1@gated-at.bofh.it> <srRwo-615-75@gated-at.bofh.it> <srTot-7lC-9@gated-at.bofh.it> <srVTk-xv-17@gated-at.bofh.it> <ss62m-7h9-7@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
On 14/10/16 09:24, Vincent Guittot wrote: > On 13 October 2016 at 23:34, Vincent Guittot <vincent.guittot@linaro.org> wrote: >> On 13 October 2016 at 20:49, Dietmar Eggemann <dietmar.eggemann@arm.com> wrote: >>> On 13/10/16 17:48, Vincent Guittot wrote: >>>> On 13 October 2016 at 17:52, Joseph Salisbury >>>> <joseph.salisbury@canonical.com> wrote: >>>>> On 10/13/2016 06:58 AM, Vincent Guittot wrote: >>>>>> Hi, >>>>>> >>>>>> On 12 October 2016 at 18:21, Joseph Salisbury >>>>>> <joseph.salisbury@canonical.com> wrote: >>>>>>> On 10/12/2016 08:20 AM, Vincent Guittot wrote: >>>>>>>> On 8 October 2016 at 13:49, Mike Galbraith <efault@gmx.de> wrote: >>>>>>>>> On Sat, 2016-10-08 at 13:37 +0200, Vincent Guittot wrote: >>>>>>>>>> On 8 October 2016 at 10:39, Ingo Molnar <mingo@kernel.org> wrote: >>>>>>>>>>> * Peter Zijlstra <peterz@infradead.org> wrote: >>>>>>>>>>> >>>>>>>>>>>> On Fri, Oct 07, 2016 at 03:38:23PM -0400, Joseph Salisbury wrote: [...] >>> When I create a tg_root/tg_x/tg_y_1 and a tg_root/tg_x/tg_y_2 group, the tg_x->load_avg >>> becomes > 6*1024 before any tasks ran in it. >> >> This is normal as se->avg.load_avg is initialized to >> scale_load_down(se->load.weight) and this se->avg.load_avg will be >> added to tg_x[cpu]->cfs_rq->avg.load_avg when attached to the cfs_rq Yeah, you right, even when I've created 50 second level groups, tg_x->load_avg is ~6800. Could it have something to do with the fact that .se->load.weight = 2 for all these task groups? on a 64bit system? In case we call __update_load_avg(..., se->on_rq * scale_load_down(se->load.weight), ...) we pass a weight argument of 0 for these se's. Does not happen with: - if (shares < MIN_SHARES) - shares = MIN_SHARES; + if (shares < scale_load(MIN_SHARES)) + shares = scale_load(MIN_SHARES); in calc_cfs_shares(). [...]
Back to linux.kernel | Previous | Next — Previous in thread | Next in thread | Find similar | Unroll thread
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Vincent Guittot <vincent.guittot@linaro.org> - 2016-10-13 13:10 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Joseph Salisbury <joseph.salisbury@canonical.com> - 2016-10-13 18:00 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Vincent Guittot <vincent.guittot@linaro.org> - 2016-10-13 19:00 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Dietmar Eggemann <dietmar.eggemann@arm.com> - 2016-10-13 21:00 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Vincent Guittot <vincent.guittot@linaro.org> - 2016-10-13 23:40 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Vincent Guittot <vincent.guittot@linaro.org> - 2016-10-14 10:30 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Dietmar Eggemann <dietmar.eggemann@arm.com> - 2016-10-14 15:20 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Vincent Guittot <vincent.guittot@linaro.org> - 2016-10-14 17:20 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Joseph Salisbury <joseph.salisbury@canonical.com> - 2016-10-14 18:10 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Vincent Guittot <vincent.guittot@linaro.org> - 2016-10-17 11:20 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Dietmar Eggemann <dietmar.eggemann@arm.com> - 2016-10-17 14:00 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Peter Zijlstra <peterz@infradead.org> - 2016-10-17 15:30 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Vincent Guittot <vincent.guittot@linaro.org> - 2016-10-17 16:00 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Dietmar Eggemann <dietmar.eggemann@arm.com> - 2016-10-18 01:00 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Vincent Guittot <vincent.guittot@linaro.org> - 2016-10-18 10:50 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Peter Zijlstra <peterz@infradead.org> - 2016-10-18 11:10 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Vincent Guittot <vincent.guittot@linaro.org> - 2016-10-18 11:50 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Peter Zijlstra <peterz@infradead.org> - 2016-10-18 12:40 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Vincent Guittot <vincent.guittot@linaro.org> - 2016-10-18 14:00 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Joonwoo Park <joonwoop@codeaurora.org> - 2016-10-19 00:00 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Vincent Guittot <vincent.guittot@linaro.org> - 2016-10-19 08:50 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Vincent Guittot <vincent.guittot@linaro.org> - 2016-10-19 16:50 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Joseph Salisbury <joseph.salisbury@canonical.com> - 2016-10-19 17:00 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Vincent Guittot <vincent.guittot@linaro.org> - 2016-10-19 17:00 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Dietmar Eggemann <dietmar.eggemann@arm.com> - 2016-10-19 17:40 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Joonwoo Park <joonwoop@codeaurora.org> - 2016-10-19 19:40 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Vincent Guittot <vincent.guittot@linaro.org> - 2016-10-19 20:00 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Vincent Guittot <vincent.guittot@linaro.org> - 2016-10-19 17:50 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Dietmar Eggemann <dietmar.eggemann@arm.com> - 2016-10-19 17:50 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Peter Zijlstra <peterz@infradead.org> - 2016-10-19 18:20 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Morten Rasmussen <morten.rasmussen@arm.com> - 2016-10-19 18:40 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Vincent Guittot <vincent.guittot@linaro.org> - 2016-10-19 19:50 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Morten Rasmussen <morten.rasmussen@arm.com> - 2016-10-20 10:00 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Dietmar Eggemann <dietmar.eggemann@arm.com> - 2016-10-18 13:20 +0200
Re: [v4.8-rc1 Regression] sched/fair: Apply more PELT fixes Peter Zijlstra <peterz@infradead.org> - 2016-10-18 14:10 +0200
csiph-web