Re: [RFC PATCH 0/2] sched/fair: introduce new scheduler group type group_parked

[Tobias Huschle <huschle@linux.ibm.com>]

On 10/12/2024 21:24, Shrikanth Hegde wrote:
> On 12/9/24 13:35, Tobias Huschle wrote:
[...]
> 
> It was happening with 100% stress-ng case. I was wondering since i dont 
> have no-hz full enabled.
> I found out the reason why and one way to do is to trigger active load 
> balance if there are any parked cpus
> in the group. That probably needs a IS_ENABLED check not to hurt the 
> regular case.
> 
> Also, I gave a try to include arch_cpu_parked in idle_cpu and friends. 
> It seems to working for me.
> I will attach the code below. It simplifies code quite a bit.
> 
> Also, I am thinking to rely on active balance codepath more than the 
> regular pull model.
> so this would be akin to asym packing codepaths. The below code does 
> that too.
> 
> Feel free to take the bits as necessary if it works.
> 

Thanks a lot for your your comments and proposals. I was working through 
them and have a v2 almost ready. I'll be offline for the next 4 weeks 
though and will post my v2 once I'm back.


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