From: Mike Galbraith <umgwanakikbuti@gmail.com>
To: Vincent Guittot <vincent.guittot@linaro.org>
Cc: Peter Zijlstra <peterz@infradead.org>,
LKML <linux-kernel@vger.kernel.org>,
Rik van Riel <riel@redhat.com>
Subject: Re: [v2 patch v3.18+ regression fix] sched: Further improve spurious CPU_IDLE active migrations
Date: Tue, 06 Sep 2016 15:07:44 +0200 [thread overview]
Message-ID: <1473167264.32128.5.camel@gmail.com> (raw)
In-Reply-To: <20160906130127.GA21960@vingu-laptop>
On Tue, 2016-09-06 at 15:01 +0200, Vincent Guittot wrote:
> Le Monday 05 Sep 2016 à 18:26:53 (+0200), Mike Galbraith a écrit :
> > Coming back to this, how about this instead, only increase the group
> > imbalance threshold when sd_llc_size == 2. Newer L3 equipped
> > processors then aren't affected.
> >
>
> Not sure that all systems with sd_llc_size == 2 wants this behavior.
>
> Why not adding a sched_feature for changing the 2nd half of the test
> for some systems ?
Because users won't know, and shouldn't need to know that they need to
flip that switch.
-Mike
next prev parent reply other threads:[~2016-09-06 13:07 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-08-30 5:42 [patch v3.18+ regression fix] sched: Further improve spurious CPU_IDLE active migrations Mike Galbraith
2016-08-31 10:01 ` Peter Zijlstra
2016-08-31 10:18 ` Mike Galbraith
2016-08-31 10:36 ` Mike Galbraith
2016-08-31 15:52 ` Vincent Guittot
2016-09-01 4:11 ` Mike Galbraith
2016-09-01 6:37 ` Mike Galbraith
2016-09-01 8:09 ` Vincent Guittot
2016-09-05 16:26 ` [v2 patch " Mike Galbraith
2016-09-06 13:01 ` Vincent Guittot
2016-09-06 13:07 ` Mike Galbraith [this message]
2016-09-06 13:42 ` Vincent Guittot
2016-09-06 13:59 ` Mike Galbraith
2016-09-06 13:44 ` Mike Galbraith
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