On 7/8/19 9:41 AM, luca abeni wrote:
> Hi Dietmar,
>
> On Thu, 4 Jul 2019 14:05:22 +0200
> Dietmar Eggemann wrote:
>
>> On 5/6/19 6:48 AM, Luca Abeni wrote:
>>
>> [...]
>>
>>> diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
>>> index 5b981eeeb944..3436f3d8fa8f 100644
>>> --- a/ker
Hi Dietmar,
On Thu, 4 Jul 2019 14:05:22 +0200
Dietmar Eggemann wrote:
> On 5/6/19 6:48 AM, Luca Abeni wrote:
>
> [...]
>
> > diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
> > index 5b981eeeb944..3436f3d8fa8f 100644
> > --- a/kernel/sched/deadline.c
> > +++ b/kernel/sched/deadl
On 5/6/19 6:48 AM, Luca Abeni wrote:
[...]
> diff --git a/kernel/sched/deadline.c b/kernel/sched/deadline.c
> index 5b981eeeb944..3436f3d8fa8f 100644
> --- a/kernel/sched/deadline.c
> +++ b/kernel/sched/deadline.c
> @@ -1584,6 +1584,9 @@ select_task_rq_dl(struct task_struct *p, int cpu, int
> sd
On Wed, 8 May 2019 10:04:36 +0200
Juri Lelli wrote:
> Hi Luca,
>
> On 06/05/19 06:48, Luca Abeni wrote:
> > From: luca abeni
> >
> > Currently, the SCHED_DEADLINE scheduler uses a global EDF scheduling
> > algorithm, migrating tasks to CPU cores without considering the core
> > capacity and th
Hi Luca,
On 06/05/19 06:48, Luca Abeni wrote:
> From: luca abeni
>
> Currently, the SCHED_DEADLINE scheduler uses a global EDF scheduling
> algorithm, migrating tasks to CPU cores without considering the core
> capacity and the task utilization. This works well on homogeneous
> systems (SCHED_DE
On Tuesday 07 May 2019 at 16:17:33 (+0200), luca abeni wrote:
> Hi Quentin,
>
> On Tue, 7 May 2019 14:35:28 +0100
> Quentin Perret wrote:
>
> > Hi Luca,
> >
> > On Monday 06 May 2019 at 06:48:32 (+0200), Luca Abeni wrote:
> > > +static inline int dl_task_fit(const struct sched_dl_entity *dl_se,
On Tuesday 07 May 2019 at 16:41:27 (+0200), luca abeni wrote:
> I think I added this modification because I arrived to the conclusion
> that schedutils does not perform this rescaling (at least, I think it
> did not perform it when I wrote the patch :)
Right, I'm not sure what was the behaviour be
Hi,
On Tue, 7 May 2019 15:10:50 +0100
Quentin Perret wrote:
> On Monday 06 May 2019 at 06:48:32 (+0200), Luca Abeni wrote:
> > static inline unsigned long cpu_bw_dl(struct rq *rq)
> > {
> > - return (rq->dl.running_bw * SCHED_CAPACITY_SCALE) >>
> > BW_SHIFT;
> > + unsigned long res;
> > +
Hi Quentin,
On Tue, 7 May 2019 14:35:28 +0100
Quentin Perret wrote:
> Hi Luca,
>
> On Monday 06 May 2019 at 06:48:32 (+0200), Luca Abeni wrote:
> > +static inline int dl_task_fit(const struct sched_dl_entity *dl_se,
> > + int cpu, u64 *c)
> > +{
> > + u64 cap = (arch_s
On Monday 06 May 2019 at 06:48:32 (+0200), Luca Abeni wrote:
> static inline unsigned long cpu_bw_dl(struct rq *rq)
> {
> - return (rq->dl.running_bw * SCHED_CAPACITY_SCALE) >> BW_SHIFT;
> + unsigned long res;
> +
> + res = (rq->dl.running_bw * SCHED_CAPACITY_SCALE) >> BW_SHIFT;
> +
>
Hi Luca,
On Monday 06 May 2019 at 06:48:32 (+0200), Luca Abeni wrote:
> +static inline int dl_task_fit(const struct sched_dl_entity *dl_se,
> + int cpu, u64 *c)
> +{
> + u64 cap = (arch_scale_cpu_capacity(NULL, cpu) *
> arch_scale_freq_capacity(cpu)) >> SCHED_CAPACIT
From: luca abeni
Currently, the SCHED_DEADLINE scheduler uses a global EDF scheduling
algorithm, migrating tasks to CPU cores without considering the core
capacity and the task utilization. This works well on homogeneous
systems (SCHED_DEADLINE tasks are guaranteed to have a bounded
tardiness), b
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