Messages in this thread | | | From | Josh Don <> | Date | Mon, 14 Mar 2022 17:30:35 -0700 | Subject | Re: [External] Re: Subject: [PATCH] sched/fair: prioritize normal task over sched_idle task with vruntime offset |
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On Sun, Mar 13, 2022 at 3:07 AM chenying <chenying.kernel@bytedance.com> wrote: > > If I set the sched_idle_vruntime_offset to a relatively small value > (e.g. 10 minutes), can this issues be avoided?
That's still long enough to cause lockups.
Is the issue that you have a large number of sched_idle entities, and the occasional latency sensitive thing that wakes up for a short duration? Have you considered approaching this from the other direction (ie. if we have a latency sensitive thing wake onto a cpu running only sched idle stuff, we could change entity placement to position the latency sensitive thing further left on the timeline, akin to !GENTLE_FAIR_SLEEPERS).
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