linux-kernel - RE: [PATCH v5 7/7] sched/fair: Add latency list

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Message-ID: <257E96C2-6ABD-4DD6-9B7F-771DA3D1BAAA@goodmis.org>
Date:   Sat, 08 Oct 2022 17:59:13 -0400
From:   Steven Rostedt <rostedt@...dmis.org>
To:     David Laight <David.Laight@...LAB.COM>,
        'Youssef Esmat' <youssefesmat@...omium.org>,
        Vincent Guittot <vincent.guittot@...aro.org>
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Subject: RE: [PATCH v5 7/7] sched/fair: Add latency list



On October 8, 2022 5:14:54 PM EDT, David Laight <David.Laight@...LAB.COM> wrote:
>...
>> Have we considered an approach where the task that is marked as
>> latency sensitive gets a boosted nice value when it sleeps and is
>> either scaled down exponentially as it runs, or immediately reset to
>> its default when it runs for one tick?
>
>Or use the RT scheduler for anything that requires low latency.
>Isn't that what it is for?
>

The RT scheduler is for tasks that require strick scheduling requirements over all else, including performance.

But we are seeing latency issues for tasks that don't have such requirements but this latency effects its quality.

-- Steve

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