On Fri, 30 Oct 2020 at 03:11, Rik van Riel wrote:
>
> On Mon, 2020-10-26 at 17:52 +0100, Vincent Guittot wrote:
> > On Mon, 26 Oct 2020 at 17:48, Chris Mason wrote:
> > > On 26 Oct 2020, at 12:20, Vincent Guittot wrote:
> > >
> > > > what you are suggesting is something like:
> > > > diff --git
On Mon, 2020-10-26 at 17:52 +0100, Vincent Guittot wrote:
> On Mon, 26 Oct 2020 at 17:48, Chris Mason wrote:
> > On 26 Oct 2020, at 12:20, Vincent Guittot wrote:
> >
> > > what you are suggesting is something like:
> > > diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c
> > > index
On Mon, 26 Oct 2020 at 17:48, Chris Mason wrote:
>
> On 26 Oct 2020, at 12:20, Vincent Guittot wrote:
>
> > Le lundi 26 oct. 2020 à 12:04:45 (-0400), Rik van Riel a écrit :
> >> On Mon, 26 Oct 2020 16:42:14 +0100
> >> Vincent Guittot wrote:
> >>> On Mon, 26 Oct 2020 at 16:04, Rik van Riel
On 26 Oct 2020, at 12:20, Vincent Guittot wrote:
Le lundi 26 oct. 2020 à 12:04:45 (-0400), Rik van Riel a écrit :
On Mon, 26 Oct 2020 16:42:14 +0100
Vincent Guittot wrote:
On Mon, 26 Oct 2020 at 16:04, Rik van Riel wrote:
Could utilization estimates be off, either lagging or
simply
Le lundi 26 oct. 2020 à 12:04:45 (-0400), Rik van Riel a écrit :
> On Mon, 26 Oct 2020 16:42:14 +0100
> Vincent Guittot wrote:
> > On Mon, 26 Oct 2020 at 16:04, Rik van Riel wrote:
>
> > > Could utilization estimates be off, either lagging or
> > > simply having a wrong estimate for a task,
On Mon, 26 Oct 2020 16:42:14 +0100
Vincent Guittot wrote:
> On Mon, 26 Oct 2020 at 16:04, Rik van Riel wrote:
> > Could utilization estimates be off, either lagging or
> > simply having a wrong estimate for a task, resulting
> > in no task getting pulled sometimes, while doing a
> >
On Mon, 26 Oct 2020 at 16:42, Vincent Guittot
wrote:
>
> On Mon, 26 Oct 2020 at 16:04, Rik van Riel wrote:
> >
> > On Mon, 2020-10-26 at 15:56 +0100, Vincent Guittot wrote:
> > > On Mon, 26 Oct 2020 at 15:38, Rik van Riel wrote:
> > > > On Mon, 2020-10-26 at 15:24 +0100, Vincent Guittot wrote:
On Mon, 26 Oct 2020 at 16:04, Rik van Riel wrote:
>
> On Mon, 2020-10-26 at 15:56 +0100, Vincent Guittot wrote:
> > On Mon, 26 Oct 2020 at 15:38, Rik van Riel wrote:
> > > On Mon, 2020-10-26 at 15:24 +0100, Vincent Guittot wrote:
> > > > Le lundi 26 oct. 2020 à 08:45:27 (-0400), Chris Mason a
On 26 Oct 2020, at 11:05, Chris Mason wrote:
On 26 Oct 2020, at 10:24, Vincent Guittot wrote:
Could you try the fix below ?
--- a/kernel/sched/fair.c
+++ b/kernel/sched/fair.c
@@ -9049,7 +9049,8 @@ static inline void calculate_imbalance(struct
lb_env *env, struct sd_lb_stats *s
*
Le lundi 26 oct. 2020 à 11:05:35 (-0400), Chris Mason a écrit :
>
>
> On 26 Oct 2020, at 10:24, Vincent Guittot wrote:
>
> > Le lundi 26 oct. 2020 à 08:45:27 (-0400), Chris Mason a écrit :
> > > On 26 Oct 2020, at 4:39, Vincent Guittot wrote:
> > >
> > > > Hi Chris
> > > >
> > > > On Sat, 24
On 26 Oct 2020, at 10:24, Vincent Guittot wrote:
Le lundi 26 oct. 2020 à 08:45:27 (-0400), Chris Mason a écrit :
On 26 Oct 2020, at 4:39, Vincent Guittot wrote:
Hi Chris
On Sat, 24 Oct 2020 at 01:49, Chris Mason wrote:
Hi everyone,
We’re validating a new kernel in the fleet, and
On Mon, 2020-10-26 at 15:56 +0100, Vincent Guittot wrote:
> On Mon, 26 Oct 2020 at 15:38, Rik van Riel wrote:
> > On Mon, 2020-10-26 at 15:24 +0100, Vincent Guittot wrote:
> > > Le lundi 26 oct. 2020 à 08:45:27 (-0400), Chris Mason a écrit :
> > > > On 26 Oct 2020, at 4:39, Vincent Guittot wrote:
On Mon, 26 Oct 2020 at 15:38, Rik van Riel wrote:
>
> On Mon, 2020-10-26 at 15:24 +0100, Vincent Guittot wrote:
> > Le lundi 26 oct. 2020 à 08:45:27 (-0400), Chris Mason a écrit :
> > > On 26 Oct 2020, at 4:39, Vincent Guittot wrote:
> > >
> > > > Hi Chris
> > > >
> > > > On Sat, 24 Oct 2020 at
On Mon, 2020-10-26 at 15:24 +0100, Vincent Guittot wrote:
> Le lundi 26 oct. 2020 à 08:45:27 (-0400), Chris Mason a écrit :
> > On 26 Oct 2020, at 4:39, Vincent Guittot wrote:
> >
> > > Hi Chris
> > >
> > > On Sat, 24 Oct 2020 at 01:49, Chris Mason wrote:
> > > > Hi everyone,
> > > >
> > > >
Le lundi 26 oct. 2020 à 08:45:27 (-0400), Chris Mason a écrit :
> On 26 Oct 2020, at 4:39, Vincent Guittot wrote:
>
> > Hi Chris
> >
> > On Sat, 24 Oct 2020 at 01:49, Chris Mason wrote:
> > >
> > > Hi everyone,
> > >
> > > We’re validating a new kernel in the fleet, and compared with v5.2,
>
On 26 Oct 2020, at 4:39, Vincent Guittot wrote:
Hi Chris
On Sat, 24 Oct 2020 at 01:49, Chris Mason wrote:
Hi everyone,
We’re validating a new kernel in the fleet, and compared with v5.2,
Which version are you using ?
several improvements have been added since v5.5 and the rework of
Hi Chris
On Sat, 24 Oct 2020 at 01:49, Chris Mason wrote:
>
> Hi everyone,
>
> We’re validating a new kernel in the fleet, and compared with v5.2,
Which version are you using ?
several improvements have been added since v5.5 and the rework of load_balance
> performance is ~2-3% lower for some
Hi everyone,
We’re validating a new kernel in the fleet, and compared with v5.2,
performance is ~2-3% lower for some of our workloads. After some
digging, Johannes found that our involuntary context switch rate was ~2x
higher, and we were leaving a CPU idle a higher percentage of the time,
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