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Message-Id: <20210804115857.6253-1-mgorman@techsingularity.net>
Date: Wed, 4 Aug 2021 12:58:55 +0100
From: Mel Gorman <mgorman@...hsingularity.net>
To: Ingo Molnar <mingo@...nel.org>
Cc: Peter Zijlstra <peterz@...radead.org>,
Vincent Guittot <vincent.guittot@...aro.org>,
Valentin Schneider <valentin.schneider@....com>,
Song Bao Hua <song.bao.hua@...ilicon.com>,
LKML <linux-kernel@...r.kernel.org>,
Mel Gorman <mgorman@...hsingularity.net>
Subject: [PATCH 0/2] Reduce SIS scanning
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(-)
--
2.31.1
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