Re: [PATCH 3/4] sched/fair: introduce core_vruntime and core_min_vruntime

[Peter Zijlstra]

On Wed, Nov 15, 2023 at 07:33:40PM +0800, Cruz Zhao wrote:
> To compare the priority of sched_entity from different cpus of a core,
> we introduce core_vruntime to struct sched_entity and core_min_vruntime
> to struct cfs_rq.
> 
> cfs_rq->core->core_min_vruntime records the min vruntime of the cfs_rqs
> of the same task_group among the core, and se->core_vruntime is the
> vruntime relative to se->cfs_rq->core->core_min_vruntime.

But that makes absolutely no sense. vruntime of different RQs can
advance at wildly different rates. Not to mention there's this random
offset between them.

No, this cannot be.