linux-kernel - [PATCH 0/3 v2] Reduce number of active LB

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Message-Id: <20210107103325.30851-1-vincent.guittot@linaro.org>
Date:   Thu,  7 Jan 2021 11:33:22 +0100
From:   Vincent Guittot <vincent.guittot@...aro.org>
To:     mingo@...hat.com, peterz@...radead.org, juri.lelli@...hat.com,
        dietmar.eggemann@....com, rostedt@...dmis.org, bsegall@...gle.com,
        mgorman@...e.de, bristot@...hat.com, valentin.schneider@....com,
        linux-kernel@...r.kernel.org
Cc:     Vincent Guittot <vincent.guittot@...aro.org>
Subject: [PATCH 0/3 v2] Reduce number of active LB

Few improvements related to active LB and the increase of LB interval.
I haven't seen any performcne impact on various benchmarks except for 
  -stress-ng mmapfork : +4.54% on my octo-core arm64
But this was somewhat expected as the changes impact mainly corner cases.

Changes since v1:
- patch 2: change how LBF_ALL_PINNED is managed as proposed by Valentin
- patch 3: updated comment and fix typos
  
Vincent Guittot (3):
  sched/fair: skip idle cfs_rq
  sched/fair: don't set LBF_ALL_PINNED unnecessarily
  sched/fair: reduce cases for active balance

 kernel/sched/fair.c | 57 +++++++++++++++++++++++++--------------------
 1 file changed, 32 insertions(+), 25 deletions(-)

-- 
2.17.1