From: Peter Zijlstra <peterz@infradead.org>
To: Jirka Hladky <jhladky@redhat.com>
Cc: linux-kernel <linux-kernel@vger.kernel.org>,
Kamil Kolakowski <kkolakow@redhat.com>,
Ingo Molnar <mingo@redhat.com>,
jplozi@unice.fr, Alexandra Fedorova <sasha@ece.ubc.ca>,
Baptiste Lepers <baptiste.lepers@gmail.com>
Subject: Re: Kernel v4.7-rc5 - performance degradation upto 40% after disabling and re-enabling a core
Date: Wed, 29 Jun 2016 10:46:37 +0200 [thread overview]
Message-ID: <20160629084637.GV30921@twins.programming.kicks-ass.net> (raw)
In-Reply-To: <CAE4VaGCPbQki+JbG=rs5Pj9x0hocZ16L4uXif_-iag8cT_RkQg@mail.gmail.com>
On Wed, Jun 29, 2016 at 01:15:17AM +0200, Jirka Hladky wrote:
> Hello,
>
> on NUMA enabled server equipped with 4 Intel E5-4610 v2 CPUs we
> observe following performance degradation:
Do you have cluster on die enabled on that machine? If you disable it,
does it still reproduce?
next prev parent reply other threads:[~2016-06-29 8:46 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-28 23:15 Jirka Hladky
2016-06-29 8:46 ` Peter Zijlstra [this message]
[not found] ` <CAE4VaGBO0soGf0pfdduxmuAxU5hCN3grha8DOa5HEgT5Lt9HVQ@mail.gmail.com>
2016-06-29 9:58 ` Peter Zijlstra
2016-07-12 9:04 ` Jirka Hladky
2016-07-28 21:48 ` Jirka Hladky
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