On Wed, Jan 20, 2021 at 09:54:20AM +, Mel Gorman wrote:
> On Wed, Jan 20, 2021 at 10:21:47AM +0100, Vincent Guittot wrote:
> > On Wed, 20 Jan 2021 at 10:12, Mel Gorman
> > wrote:
> > >
> > > On Wed, Jan 20, 2021 at 02:00:18PM +0530, Gautham R Shenoy wrote:
> > > > > @@ -6157,18 +6169,31 @@
On Wed, Jan 20, 2021 at 10:21:47AM +0100, Vincent Guittot wrote:
> On Wed, 20 Jan 2021 at 10:12, Mel Gorman wrote:
> >
> > On Wed, Jan 20, 2021 at 02:00:18PM +0530, Gautham R Shenoy wrote:
> > > > @@ -6157,18 +6169,31 @@ static int select_idle_cpu(struct task_struct
> > > > *p, struct sched_domai
On Wed, 20 Jan 2021 at 10:54, Mel Gorman wrote:
>
> On Wed, Jan 20, 2021 at 10:21:47AM +0100, Vincent Guittot wrote:
> > On Wed, 20 Jan 2021 at 10:12, Mel Gorman
> > wrote:
> > >
> > > On Wed, Jan 20, 2021 at 02:00:18PM +0530, Gautham R Shenoy wrote:
> > > > > @@ -6157,18 +6169,31 @@ static int
On Wed, 20 Jan 2021 at 10:12, Mel Gorman wrote:
>
> On Wed, Jan 20, 2021 at 02:00:18PM +0530, Gautham R Shenoy wrote:
> > > @@ -6157,18 +6169,31 @@ static int select_idle_cpu(struct task_struct *p,
> > > struct sched_domain *sd, int t
> > > }
> > >
> > > for_each_cpu_wrap(cpu, cpus, targe
On Wed, Jan 20, 2021 at 02:00:18PM +0530, Gautham R Shenoy wrote:
> > @@ -6157,18 +6169,31 @@ static int select_idle_cpu(struct task_struct *p,
> > struct sched_domain *sd, int t
> > }
> >
> > for_each_cpu_wrap(cpu, cpus, target) {
> > - if (!--nr)
> > - return
Hello Mel, Peter,
On Tue, Jan 19, 2021 at 11:22:11AM +, Mel Gorman wrote:
> From: Peter Zijlstra (Intel)
>
> Both select_idle_core() and select_idle_cpu() do a loop over the same
> cpumask. Observe that by clearing the already visited CPUs, we can
> fold the iteration and iterate a core at a
From: Peter Zijlstra (Intel)
Both select_idle_core() and select_idle_cpu() do a loop over the same
cpumask. Observe that by clearing the already visited CPUs, we can
fold the iteration and iterate a core at a time.
All we need to do is remember any non-idle CPU we encountered while
scanning for
On Mon, Jan 18, 2021 at 08:55:03PM +0800, Li, Aubrey wrote:
> > diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
> > index 12e08da90024..6c0f841e9e75 100644
> > --- a/kernel/sched/fair.c
> > +++ b/kernel/sched/fair.c
> > @@ -6006,6 +6006,14 @@ static inline int find_idlest_cpu(struct
> > sch
On 2021/1/15 18:08, Mel Gorman wrote:
> From: Peter Zijlstra (Intel)
>
> Both select_idle_core() and select_idle_cpu() do a loop over the same
> cpumask. Observe that by clearing the already visited CPUs, we can
> fold the iteration and iterate a core at a time.
>
> All we need to do is remember
From: Peter Zijlstra (Intel)
Both select_idle_core() and select_idle_cpu() do a loop over the same
cpumask. Observe that by clearing the already visited CPUs, we can
fold the iteration and iterate a core at a time.
All we need to do is remember any non-idle CPU we encountered while
scanning for
On Thu, Jan 14, 2021 at 04:44:46PM +0100, Vincent Guittot wrote:
> > domain. There is no need to make it specific to the core account and we
> > are already doing the full scan. Throttling that would be a separate patch.
> >
> > > This patch 5 should focus on merging select_idle_core and
> > > sele
On Thu, 14 Jan 2021 at 14:53, Mel Gorman wrote:
>
> On Thu, Jan 14, 2021 at 02:25:32PM +0100, Vincent Guittot wrote:
> > On Thu, 14 Jan 2021 at 10:35, Mel Gorman
> > wrote:
> > >
> > > On Wed, Jan 13, 2021 at 06:03:00PM +0100, Vincent Guittot wrote:
> > > > > @@ -6159,16 +6171,29 @@ static int s
On Thu, Jan 14, 2021 at 02:25:32PM +0100, Vincent Guittot wrote:
> On Thu, 14 Jan 2021 at 10:35, Mel Gorman wrote:
> >
> > On Wed, Jan 13, 2021 at 06:03:00PM +0100, Vincent Guittot wrote:
> > > > @@ -6159,16 +6171,29 @@ static int select_idle_cpu(struct task_struct
> > > > *p, struct sched_domain
On Thu, 14 Jan 2021 at 10:35, Mel Gorman wrote:
>
> On Wed, Jan 13, 2021 at 06:03:00PM +0100, Vincent Guittot wrote:
> > > @@ -6159,16 +6171,29 @@ static int select_idle_cpu(struct task_struct *p,
> > > struct sched_domain *sd, int t
> > > for_each_cpu_wrap(cpu, cpus, target) {
> > >
On Wed, Jan 13, 2021 at 06:03:00PM +0100, Vincent Guittot wrote:
> > @@ -6159,16 +6171,29 @@ static int select_idle_cpu(struct task_struct *p,
> > struct sched_domain *sd, int t
> > for_each_cpu_wrap(cpu, cpus, target) {
> > if (!--nr)
> > return -1;
On Mon, 11 Jan 2021 at 16:50, Mel Gorman wrote:
>
> Both select_idle_core() and select_idle_cpu() do a loop over the same
> cpumask. Observe that by clearing the already visited CPUs, we can
> fold the iteration and iterate a core at a time.
>
> All we need to do is remember any non-idle CPU we en
Both select_idle_core() and select_idle_cpu() do a loop over the same
cpumask. Observe that by clearing the already visited CPUs, we can
fold the iteration and iterate a core at a time.
All we need to do is remember any non-idle CPU we encountered while
scanning for an idle core. This way we'll on
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