From: Martin Ichilevici de Oliveira <iomartin@iomartin.net>
To: Andreas Hollmann <hollmann@in.tum.de>
Cc: linux-numa@vger.kernel.org
Subject: Re: NUMA balancing degrading performance
Date: Mon, 27 Oct 2014 19:27:34 -0200 [thread overview]
Message-ID: <20141027212734.GB31696@gamayun> (raw)
In-Reply-To: <CAGz0_-3ukQGieAQ_NjcW6W9A2R3u5kCUxr4NETy5Z28srsxcNw@mail.gmail.com>
[-- Attachment #1: Type: text/plain, Size: 922 bytes --]
Hello Andreas,
Thank you for your reply. Please check my comments inline.
> it would be good to know which applications/benchmarks you were running.
>
> Have you tried out some well known and open source benchmarks?
>
> NAS Parallel Benchmarks -
> http://www.nas.nasa.gov/publications/npb.html (Fortran Code)
> NPB2.3-omp-C.tgz (C version NPB in OpenMP) -
> http://www.hpcs.cs.tsukuba.ac.jp/omni-compiler/download/NPB2.3-omp-C.tgz
> Stream - http://www.cs.virginia.edu/stream/FTP/Code/stream.c
Sorry, I should have mentioned that. I tried some NAS benchmarks:
bt, sp and lu-hp. bt and sp were around 60% slower with the balancing
turned on, and lu-hp was 10 times slower.
I also ran Lulesh, which was roughly 100% slower with the balancing
turned on.
> Do you have "numad" running on your machine? If it is running you
> should stop it.
I checked and it's not running.
Cheers,
Martin
[-- Attachment #2: Type: application/pgp-signature, Size: 819 bytes --]
next prev parent reply other threads:[~2014-10-27 21:27 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 [this message]
2014-10-28 21:57 ` Andreas Hollmann
2014-10-29 2:37 ` Martin Ichilevici de Oliveira
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20141027212734.GB31696@gamayun \
--to=iomartin@iomartin.net \
--cc=hollmann@in.tum.de \
--cc=linux-numa@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.