From: "Prakash K. Cheemplavam" <prakashkc@gmx.de>
To: unlisted-recipients:; (no To-header on input)
Cc: Con Kolivas <kernel@kolivas.org>,
linux kernel mailing list <linux-kernel@vger.kernel.org>
Subject: Re: Scheduler fairness problem on 2.6 series
Date: Wed, 11 Aug 2004 21:22:25 +0200 [thread overview]
Message-ID: <411A71F1.3090504@gmx.de> (raw)
In-Reply-To: <411A0B71.4030503@gmx.de>
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
|
| I don't think it is the overhead. I rather think the way the kernel
| schedulers gives mpich and the cpu bound program resources is unfair.
Well, I don't know whether it helps, but I ran a profiler and these are
the functions which cause so much wasted CPU cycles when running 16
processes of my example with mpich:
124910 9.8170 vmlinux tcp_poll
123356 9.6949 vmlinux sys_select
85634 6.7302 vmlinux do_select
71858 5.6475 vmlinux sysenter_past_esp
62093 4.8801 vmlinux kfree
51658 4.0600 vmlinux __copy_to_user_ll
37495 2.9468 vmlinux max_select_fd
36949 2.9039 vmlinux __kmalloc
22700 1.7841 vmlinux __copy_from_user_ll
14587 1.1464 vmlinux do_gettimeofday
Is anything scheduler related?
bye,
Prakash
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.5 (GNU/Linux)
Comment: Using GnuPG with Thunderbird - http://enigmail.mozdev.org
iD8DBQFBGnHxxU2n/+9+t5gRAlF+AJ9z+OqbIJYkeiy4nAPVB22S/WLLnACg1khF
XeF+3Hq0adpoLjdbn+tmzn0=
=7Onu
-----END PGP SIGNATURE-----
next prev parent reply other threads:[~2004-08-11 19:22 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20040811010116.GL11200@holomorphy.com>
2004-08-11 2:21 ` Scheduler fairness problem on 2.6 series (Attn: Nick Piggin and others) spaminos-ker
2004-08-11 2:23 ` William Lee Irwin III
2004-08-11 2:45 ` Peter Williams
2004-08-11 2:47 ` Peter Williams
2004-08-11 3:23 ` Peter Williams
2004-08-11 3:31 ` Con Kolivas
2004-08-11 3:46 ` Peter Williams
2004-08-11 3:44 ` Peter Williams
2004-08-13 0:13 ` spaminos-ker
2004-08-13 1:44 ` Peter Williams
2004-08-11 3:09 ` Con Kolivas
2004-08-11 10:24 ` Prakash K. Cheemplavam
2004-08-11 11:26 ` Scheduler fairness problem on 2.6 series Con Kolivas
2004-08-11 12:05 ` Prakash K. Cheemplavam
2004-08-11 19:22 ` Prakash K. Cheemplavam [this message]
2004-08-11 23:42 ` Con Kolivas
2004-08-12 8:08 ` Prakash K. Cheemplavam
2004-08-12 18:18 ` Bill Davidsen
2004-08-12 2:04 ` Scheduler fairness problem on 2.6 series (Attn: Nick Piggin and others) spaminos-ker
2004-08-12 2:24 ` spaminos-ker
2004-08-12 2:53 ` Con Kolivas
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=411A71F1.3090504@gmx.de \
--to=prakashkc@gmx.de \
--cc=kernel@kolivas.org \
--cc=linux-kernel@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.