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 a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox