On Fri, May 22, 2020 at 11:44:06AM +0800, Aaron Lu wrote:
[...]
> > Updated diff below:
> >
> > ---8<---
> >
> > diff --git a/kernel/sched/core.c b/kernel/sched/core.c
> > index 005d7f7323e2d..625377f393ed3 100644
> > --- a/kernel/sched/core.c
> > +++ b/kernel/sched/core.c
>
On Thu, May 21, 2020 at 10:35:56PM -0400, Joel Fernandes wrote:
> Discussed a lot with Vineeth. Below is an improved version of the pick_task()
> similification.
>
> It also handles the following "bug" in the existing code as well that Vineeth
> brought up in OSPM: Suppose 2 siblings of a core:
On Thu, May 21, 2020 at 07:14:26PM -0400, Joel Fernandes wrote:
> On Wed, Mar 04, 2020 at 04:59:57PM +, vpillai wrote:
> > From: Peter Zijlstra
> >
> > Instead of only selecting a local task, select a task for all SMT
> > siblings for every reschedule on the core (irrespective which logical
On Thu, May 21, 2020 at 07:14:26PM -0400, Joel Fernandes wrote:
> On Wed, Mar 04, 2020 at 04:59:57PM +, vpillai wrote:
[snip]
> > + /*
> > +* If class_pick is idle or matches cookie, return early.
> > +*/
> > + if (cookie_equals(class_pick, cookie))
> > + return
On Wed, Mar 04, 2020 at 04:59:57PM +, vpillai wrote:
> From: Peter Zijlstra
>
> Instead of only selecting a local task, select a task for all SMT
> siblings for every reschedule on the core (irrespective which logical
> CPU does the reschedule).
>
> There could be races in core scheduler
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