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>
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|
| 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
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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
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