linux-kernel - Re: [PATCH 1/4] sched,numa: override part of migrate_degrades

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Message-ID: <20170624065830.tuyznoakmzoekvdh@gmail.com>
Date:   Sat, 24 Jun 2017 08:58:30 +0200
From:   Ingo Molnar <mingo@...nel.org>
To:     riel@...hat.com
Cc:     linux-kernel@...r.kernel.org, jhladky@...hat.com, mgorman@...e.de,
        peterz@...radead.org
Subject: Re: [PATCH 1/4] sched,numa: override part of
 migrate_degrades_locality when idle balancing


* riel@...hat.com <riel@...hat.com> wrote:

> From: Rik van Riel <riel@...hat.com>
> 
> Several tests in the NAS benchmark seem to run a lot slower with
> NUMA balancing enabled, than with NUMA balancing disabled. The
> slower run time corresponds with increased idle time.
> 
> Overriding the final test of migrate_degrades_locality (but still
> doing the other NUMA tests first) seems to improve performance
> of those benchmarks.
> 
> Reported-by: Jirka Hladky <jhladky@...hat.com>
> Signed-off-by: Rik van Riel <riel@...riel.com>
> Signed-off-by: Rik van Riel <riel@...hat.com>

Note, I removed the first SOB from the commit, assuming that you only meant to 
include the second one?

Thanks,

	Ingo