SIS_AVG_CPU was introduced as a means of avoiding a search when the
average search cost indicated that the search would likely fail. It was
a blunt instrument and disabled by commit 4c77b18cf8b7 ("sched/fair: Make
select_idle_cpu() more aggressive") and later replaced with a proportional
search
SIS_AVG_CPU was introduced as a means of avoiding a search when the
average search cost indicated that the search would likely fail. It was
a blunt instrument and disabled by commit 4c77b18cf8b7 ("sched/fair: Make
select_idle_cpu() more aggressive") and later replaced with a proportional
search
On Tue, 8 Dec 2020 at 16:35, Mel Gorman wrote:
>
> SIS_AVG_CPU was introduced as a means of avoiding a search when the
> average search cost indicated that the search would likely fail. It
> was a blunt instrument and disabled by 4c77b18cf8b7 ("sched/fair: Make
> select_idle_cpu() more
SIS_AVG_CPU was introduced as a means of avoiding a search when the
average search cost indicated that the search would likely fail. It
was a blunt instrument and disabled by 4c77b18cf8b7 ("sched/fair: Make
select_idle_cpu() more aggressive") and later replaced with a proportional
search depth by
On Tue, 8 Dec 2020 at 16:12, Mel Gorman wrote:
>
> On Tue, Dec 08, 2020 at 03:47:40PM +0100, Vincent Guittot wrote:
> > > I considered it but made the choice to exclude the cost of cpumask_and()
> > > from the avg_scan_cost instead. It's minor but when doing the original
> >
> > At the cost of a
On Tue, Dec 08, 2020 at 03:47:40PM +0100, Vincent Guittot wrote:
> > I considered it but made the choice to exclude the cost of cpumask_and()
> > from the avg_scan_cost instead. It's minor but when doing the original
>
> At the cost of a less readable code
>
Slightly less readable, yes.
> >
On Tue, 8 Dec 2020 at 14:54, Mel Gorman wrote:
>
> On Tue, Dec 08, 2020 at 02:43:10PM +0100, Vincent Guittot wrote:
> > On Tue, 8 Dec 2020 at 14:36, Mel Gorman wrote:
> > >
> > > On Tue, Dec 08, 2020 at 02:24:32PM +0100, Vincent Guittot wrote:
> > > > > > Nitpick:
> > > > > >
> > > > > > Since
On Tue, Dec 08, 2020 at 02:43:10PM +0100, Vincent Guittot wrote:
> On Tue, 8 Dec 2020 at 14:36, Mel Gorman wrote:
> >
> > On Tue, Dec 08, 2020 at 02:24:32PM +0100, Vincent Guittot wrote:
> > > > > Nitpick:
> > > > >
> > > > > Since now avg_cost and avg_idle are only used w/ SIS_PROP, they could
On Tue, 8 Dec 2020 at 14:36, Mel Gorman wrote:
>
> On Tue, Dec 08, 2020 at 02:24:32PM +0100, Vincent Guittot wrote:
> > > > Nitpick:
> > > >
> > > > Since now avg_cost and avg_idle are only used w/ SIS_PROP, they could go
> > > > completely into the SIS_PROP if condition.
> > > >
> > >
> > >
On Tue, Dec 08, 2020 at 02:24:32PM +0100, Vincent Guittot wrote:
> > > Nitpick:
> > >
> > > Since now avg_cost and avg_idle are only used w/ SIS_PROP, they could go
> > > completely into the SIS_PROP if condition.
> > >
> >
> > Yeah, I can do that. In the initial prototype, that happened in a
> >
On Tue, 8 Dec 2020 at 11:59, Mel Gorman wrote:
>
> On Tue, Dec 08, 2020 at 11:07:19AM +0100, Dietmar Eggemann wrote:
> > On 07/12/2020 10:15, Mel Gorman wrote:
> > > SIS_AVG_CPU was introduced as a means of avoiding a search when the
> > > average search cost indicated that the search would
On Tue, Dec 08, 2020 at 11:07:19AM +0100, Dietmar Eggemann wrote:
> On 07/12/2020 10:15, Mel Gorman wrote:
> > SIS_AVG_CPU was introduced as a means of avoiding a search when the
> > average search cost indicated that the search would likely fail. It
> > was a blunt instrument and disabled by
On 07/12/2020 10:15, Mel Gorman wrote:
> SIS_AVG_CPU was introduced as a means of avoiding a search when the
> average search cost indicated that the search would likely fail. It
> was a blunt instrument and disabled by 4c77b18cf8b7 ("sched/fair: Make
> select_idle_cpu() more aggressive") and
On Mon, 7 Dec 2020 at 10:15, Mel Gorman wrote:
>
> SIS_AVG_CPU was introduced as a means of avoiding a search when the
> average search cost indicated that the search would likely fail. It
> was a blunt instrument and disabled by 4c77b18cf8b7 ("sched/fair: Make
> select_idle_cpu() more
SIS_AVG_CPU was introduced as a means of avoiding a search when the
average search cost indicated that the search would likely fail. It
was a blunt instrument and disabled by 4c77b18cf8b7 ("sched/fair: Make
select_idle_cpu() more aggressive") and later replaced with a proportional
search depth by
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