On 4 December 2016 at 00:25, Matt Fleming wrote:
> On Fri, 25 Nov, at 04:34:32PM, Vincent Guittot wrote:
>> During fork, the utilization of a task is init once the rq has been
>> selected because the current utilization level of the rq is used to set
>> the utilization of the fork task. As the tas
On Tue, Nov 29, 2016 at 02:46:10PM +, Morten Rasmussen wrote:
> On Tue, Nov 29, 2016 at 12:42:43PM +0100, Peter Zijlstra wrote:
> > On Tue, Nov 29, 2016 at 10:57:59AM +, Morten Rasmussen wrote:
> > > > @@ -5708,13 +5708,6 @@ static int select_idle_cpu(struct task_struct
> > > > *p, struct
On Fri, 25 Nov, at 04:34:32PM, Vincent Guittot wrote:
> During fork, the utilization of a task is init once the rq has been
> selected because the current utilization level of the rq is used to set
> the utilization of the fork task. As the task's utilization is still
> null at this step of the for
On 29 November 2016 at 15:50, Morten Rasmussen wrote:
> On Tue, Nov 29, 2016 at 02:04:27PM +0100, Vincent Guittot wrote:
>> On 29 November 2016 at 11:57, Morten Rasmussen
>> wrote:
>> > On Fri, Nov 25, 2016 at 04:34:32PM +0100, Vincent Guittot wrote:
>> >> @@ -5708,13 +5708,6 @@ static int selec
On Tue, Nov 29, 2016 at 02:04:27PM +0100, Vincent Guittot wrote:
> On 29 November 2016 at 11:57, Morten Rasmussen
> wrote:
> > On Fri, Nov 25, 2016 at 04:34:32PM +0100, Vincent Guittot wrote:
> >> @@ -5708,13 +5708,6 @@ static int select_idle_cpu(struct task_struct *p,
> >> struct sched_domain *
On Tue, Nov 29, 2016 at 12:42:43PM +0100, Peter Zijlstra wrote:
> On Tue, Nov 29, 2016 at 10:57:59AM +, Morten Rasmussen wrote:
> > > @@ -5708,13 +5708,6 @@ static int select_idle_cpu(struct task_struct *p,
> > > struct sched_domain *sd, int t
> > >
> > > avg_cost = this_sd->avg_scan_cost;
On 29 November 2016 at 11:57, Morten Rasmussen wrote:
> On Fri, Nov 25, 2016 at 04:34:32PM +0100, Vincent Guittot wrote:
>> During fork, the utilization of a task is init once the rq has been
>> selected because the current utilization level of the rq is used to set
>> the utilization of the fork
On Tue, Nov 29, 2016 at 11:44:19AM +, Matt Fleming wrote:
> On Tue, 29 Nov, at 12:42:43PM, Peter Zijlstra wrote:
> >
> > IIRC, and my pounding head really doesn't remember much, the comment
> > reads like we need the large fudge factor because hackbench. That is,
> > hackbench would like this
On Tue, 29 Nov, at 12:42:43PM, Peter Zijlstra wrote:
>
> IIRC, and my pounding head really doesn't remember much, the comment
> reads like we need the large fudge factor because hackbench. That is,
> hackbench would like this test to go away, but others benchmarks will
> tank.
>
> Now, if only I
On Tue, Nov 29, 2016 at 10:57:59AM +, Morten Rasmussen wrote:
> > @@ -5708,13 +5708,6 @@ static int select_idle_cpu(struct task_struct *p,
> > struct sched_domain *sd, int t
> >
> > avg_cost = this_sd->avg_scan_cost;
> >
> > - /*
> > -* Due to large variance we need a large fuzz
On Fri, Nov 25, 2016 at 04:34:32PM +0100, Vincent Guittot wrote:
> During fork, the utilization of a task is init once the rq has been
> selected because the current utilization level of the rq is used to set
> the utilization of the fork task. As the task's utilization is still
> null at this step
On 28 November 2016 at 18:01, Matt Fleming wrote:
> On Fri, 25 Nov, at 04:34:32PM, Vincent Guittot wrote:
>>
>> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
>> index aa47589..820a787 100644
>> --- a/kernel/sched/fair.c
>> +++ b/kernel/sched/fair.c
>> @@ -5463,13 +5463,19 @@ find_idlest_g
On Fri, 25 Nov, at 04:34:32PM, Vincent Guittot wrote:
>
> diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
> index aa47589..820a787 100644
> --- a/kernel/sched/fair.c
> +++ b/kernel/sched/fair.c
> @@ -5463,13 +5463,19 @@ find_idlest_group(struct sched_domain *sd, struct
> task_struct *p,
>
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