[PATCH 0/2] Reduce SIS scanning

From: Mel Gorman
Date: Wed Aug 04 2021 - 07:59:14 EST


This is the first two patches from "Modify and/or delete SIS_PROP" and
focues on improving the hit rate for recent_used_cpu and avoids rescanning
the target CPU when it's known to be busy. These are relatively simply
patches in comparison to the full series which could be a regression
magnet and that series had at least one mistake in it.

In general, the usual suspects showed mostly small gains with a few
exceptions. Usual suspects were NAS, hackbench, schbench (Facebook
latency-sensitive workload), perf pipe, kernel building, git test suite,
dbench and redis.

>From here, the next obvious candidates are either improving has_idle_cores
or continuing to try remove/improve SIS_PROP.

kernel/sched/fair.c | 6 ++----
1 file changed, 2 insertions(+), 4 deletions(-)

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2.31.1