Re: [PATCH v8 4/5] locking/qspinlock: Introduce starvation avoidance into CNA

[Alex Kogan]

> On Jan 25, 2020, at 6:19 AM, Peter Zijlstra <peterz@xxxxxxxxxxxxx> wrote:
> 
> On Fri, Jan 24, 2020 at 01:19:05PM -0500, Alex Kogan wrote:
> 
>> Is there a lightweight way to identify such a âprioritizedâ thread?
> 
> No; people might for instance care about tail latencies between their
> identically spec'ed worker tasks.

I would argue that those users need to tune/reduce the intra-node handoff
threshold for their needs. Or disable CNA altogether.

In general, Peter, seems like you are not on board with the way Longman
suggested to handle prioritized threads. Am I right?

Thanks,
â Alex