On 31 October 2017 at 16:01, Peter Zijlstra wrote:
> On Tue, Oct 31, 2017 at 12:14:11PM +0100, Vincent Guittot wrote:
>
>> > + if (runnable_sum >= 0) {
>> > + /*
>> > +* Add runnable; clip at LOAD_AVG_MAX. Reflects that until
>> > +* the CPU is s
On Tue, Oct 31, 2017 at 12:14:11PM +0100, Vincent Guittot wrote:
> > + if (runnable_sum >= 0) {
> > + /*
> > +* Add runnable; clip at LOAD_AVG_MAX. Reflects that until
> > +* the CPU is saturated running == runnable.
> > +*/
> > +
On 30 October 2017 at 18:20, Peter Zijlstra wrote:
> So after a bit of poking I ended up with something like the below; I
> think there's still a few open points, see XXX. But its better than we
> have now.
>
> Josef, could you see if this completely wrecks your workloads?
>
> ---
> Subject: sched
So after a bit of poking I ended up with something like the below; I
think there's still a few open points, see XXX. But its better than we
have now.
Josef, could you see if this completely wrecks your workloads?
---
Subject: sched: Update runnable propagation rule
From: Vincent Guittot
Date: Th
On Wed, Oct 18, 2017 at 01:45:25PM +0100, Morten Rasmussen wrote:
> > > > + * Basically (4) but in differential form:
> > > > + *
> > > > + * d(runnable_avg) += se->avg.load_avg / se->load.weight
> > > > + *(5)
> > > > + * ge->avg.
Subject: [PATCH v2] sched: Update runnable propagation rule
Unlike running, the runnable part can't be directly propagated through
the hierarchy when we migrate a task. The main reason is that runnable
time can be shared with other sched_entities that stay on the rq and this
runnable time will als
On Mon, Oct 09, 2017 at 11:45:17AM +0200, Peter Zijlstra wrote:
> On Mon, Oct 09, 2017 at 09:08:57AM +0100, Morten Rasmussen wrote:
> > > --- a/kernel/sched/debug.c
> > > +++ b/kernel/sched/debug.c
> > > @@ -565,6 +565,8 @@ void print_cfs_rq(struct seq_file *m, in
> > > cfs_rq->re
Hi Peter,
Le Friday 13 Oct 2017 à 22:41:11 (+0200), Peter Zijlstra a écrit :
> On Fri, Oct 13, 2017 at 05:22:54PM +0200, Vincent Guittot wrote:
> >
> > I have studied a bit more how to improve the propagation formula and the
> > changes below is doing the job for the UCs that I have tested.
> >
On 13 October 2017 at 22:41, Peter Zijlstra wrote:
> On Fri, Oct 13, 2017 at 05:22:54PM +0200, Vincent Guittot wrote:
>>
>> I have studied a bit more how to improve the propagation formula and the
>> changes below is doing the job for the UCs that I have tested.
>>
>> Unlike running, we can't dire
On Fri, Oct 13, 2017 at 05:22:54PM +0200, Vincent Guittot wrote:
>
> I have studied a bit more how to improve the propagation formula and the
> changes below is doing the job for the UCs that I have tested.
>
> Unlike running, we can't directly propagate the runnable through hierarchy
> when we m
Hi Peter,
Le Tuesday 10 Oct 2017 à 09:44:53 (+0200), Vincent Guittot a écrit :
> On 10 October 2017 at 09:29, Peter Zijlstra wrote:
> > On Mon, Oct 09, 2017 at 05:29:04PM +0200, Vincent Guittot wrote:
> >> On 9 October 2017 at 17:03, Vincent Guittot
> >> wrote:
> >> > On 1 September 2017 at 15:
On 10 October 2017 at 09:29, Peter Zijlstra wrote:
> On Mon, Oct 09, 2017 at 05:29:04PM +0200, Vincent Guittot wrote:
>> On 9 October 2017 at 17:03, Vincent Guittot
>> wrote:
>> > On 1 September 2017 at 15:21, Peter Zijlstra wrote:
>
>> >> +/*
>> >> + * When on migration a sched_entity joins/le
On Mon, Oct 09, 2017 at 05:29:04PM +0200, Vincent Guittot wrote:
> On 9 October 2017 at 17:03, Vincent Guittot
> wrote:
> > On 1 September 2017 at 15:21, Peter Zijlstra wrote:
> >> +/*
> >> + * When on migration a sched_entity joins/leaves the PELT hierarchy, we
> >> need to
> >> + * propagate
On 9 October 2017 at 17:03, Vincent Guittot wrote:
> Hi Peter,
>
> On 1 September 2017 at 15:21, Peter Zijlstra wrote:
>> When an entity migrates in (or out) of a runqueue, we need to add (or
>> remove) its contribution from the entire PELT hierarchy, because even
>> non-runnable entities are inc
Hi Peter,
On 1 September 2017 at 15:21, Peter Zijlstra wrote:
> When an entity migrates in (or out) of a runqueue, we need to add (or
> remove) its contribution from the entire PELT hierarchy, because even
> non-runnable entities are included in the load average sums.
>
> In order to do this we h
On Mon, Oct 09, 2017 at 09:08:57AM +0100, Morten Rasmussen wrote:
> > --- a/kernel/sched/debug.c
> > +++ b/kernel/sched/debug.c
> > @@ -565,6 +565,8 @@ void print_cfs_rq(struct seq_file *m, in
> > cfs_rq->removed.load_avg);
> > SEQ_printf(m, " .%-30s: %ld\n", "removed.util_
On Fri, Sep 01, 2017 at 03:21:11PM +0200, Peter Zijlstra wrote:
> When an entity migrates in (or out) of a runqueue, we need to add (or
> remove) its contribution from the entire PELT hierarchy, because even
> non-runnable entities are included in the load average sums.
>
> In order to do this we
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