linux-kernel - [PATCH 0/4] NUMA improvements with task wakeup and load balancing

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Date:   Fri, 23 Jun 2017 12:55:26 -0400
From:   riel@...hat.com
To:     linux-kernel@...r.kernel.org
Cc:     jhladky@...hat.com, mingo@...nel.org, mgorman@...e.de,
        peterz@...radead.org
Subject: [PATCH 0/4] NUMA improvements with task wakeup and load balancing

With these patches, and Peter Zijlstra's select_idle_sibling
scalability improvement, Jirka has seen these performance
gains on a 4.11 kernel:

NAS shows improvements in range 20-100%
SPECjbb2005 shows improvements around 6-8% in the single instance mode
SPECjvm2008 - improvements around 10%

Unfortunately the full set of tests takes about a week to
run, so numbers are not broken out for individual patches.

We have done previous runs with other scheduler changes,
which did not work out - they showed improvements on some
workloads, and regressions on others.

4.11 performance still lags behind 3.10 for some workloads.
I am trying to figure out why, and close that gap.

Diffstat:

 fair.c |  271 +++++++++++++++++++++--------------------------------------------
 1 file changed, 88 insertions(+), 183 deletions(-)