From: Martin Ichilevici de Oliveira <iomartin@iomartin.net>
To: Andreas Hollmann <hollmann@in.tum.de>
Cc: linux-numa <linux-numa@vger.kernel.org>
Subject: Re: NUMA balancing degrading performance
Date: Wed, 29 Oct 2014 00:37:36 -0200 [thread overview]
Message-ID: <20141029023736.GH31696@gamayun> (raw)
In-Reply-To: <CAGz0_-35AVgP_wVn_Br0+sNwXE8dCzD3y7P0pjwmK+A9tyHzLA@mail.gmail.com>
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On Tue, Oct 28, 2014 at 10:57:37PM +0100, Andreas Hollmann wrote:
> Hi Martin,
>
> I had some time to run NPB.
>
> LU-HP is not available in NPB 3.3.1, so I used LU instead.
>
> With numa balance enabled
> Enabling this option increases the runtime by more then 50 % in the worst case.
Andreas,
Thank you for taking the time to run it in your computer. I ran LU from
NPB 3.1.1 and got results similar to yours (up to 50% performance loss).
Do you have any idea/guess what might be causing it?
Do you know of any benchmark that improves with the automatic NUMA
balancing? I'd like to see how that goes on my machine.
Thanks,
Martin
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prev parent reply other threads:[~2014-10-29 2:37 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-10-27 18:07 NUMA balancing degrading performance Martin Ichilevici de Oliveira
[not found] ` <CAGz0_-3ukQGieAQ_NjcW6W9A2R3u5kCUxr4NETy5Z28srsxcNw@mail.gmail.com>
2014-10-27 21:27 ` Martin Ichilevici de Oliveira
2014-10-28 21:57 ` Andreas Hollmann
2014-10-29 2:37 ` Martin Ichilevici de Oliveira [this message]
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