Messages in this thread | | | Date | Thu, 18 Jul 2019 15:38:16 +0530 | From | Srikar Dronamraju <> | Subject | Re: [RFC PATCH 3/3] sched: introduce tunables to control soft affinity |
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* subhra mazumdar <subhra.mazumdar@oracle.com> [2019-06-26 15:47:18]:
> For different workloads the optimal "softness" of soft affinity can be > different. Introduce tunables sched_allowed and sched_preferred that can > be tuned via /proc. This allows to chose at what utilization difference > the scheduler will chose cpus_allowed over cpus_preferred in the first > level of search. Depending on the extent of data sharing, cache coherency > overhead of the system etc. the optimal point may vary. > > Signed-off-by: subhra mazumdar <subhra.mazumdar@oracle.com> > ---
Correct me but this patchset only seems to be concentrated on the wakeup path, I don't see any changes in the regular load balancer or the numa-balancer. If system is loaded or tasks are CPU intensive, then wouldn't these tasks be moved to cpus_allowed instead of cpus_preferred and hence breaking this soft affinity.
-- Thanks and Regards Srikar Dronamraju
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