Messages in this thread | | | Date | Fri, 2 Feb 2018 21:04:01 +0100 | From | Peter Zijlstra <> | Subject | Re: [RESEND RFC PATCH V3] sched: Improve scalability of select_idle_sibling using SMT balance |
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On Fri, Feb 02, 2018 at 01:34:58PM -0500, Steven Sistare wrote: > Actually, I take back my take back. I suspect the primary benefit > of random selection is that it breaks up resonance states where > CPUs that are busy tend to stay busy, and CPUs that are idle tend > to stay idle, which is reinforced by starting the search at target = > last cpu ran.
Which, according to there here patches:
https://lkml.kernel.org/r/20180130104555.4125-1-mgorman@techsingularity.net
is a good thing, because of power management.
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