From: Michal Piotrowski <michal.k.k.piotrowski@gmail.com>
To: Peter Williams <pwil3058@bigpond.net.au>
Cc: LKML <linux-kernel@vger.kernel.org>
Subject: Re: Schedulers benchmark - Was: [ANNOUNCE][RFC] PlugSched-5.2.4 for 2.6.12 and 2.6.13-rc6
Date: Wed, 17 Aug 2005 13:59:04 +0200 [thread overview]
Message-ID: <6bffcb0e05081704595bfccccf@mail.gmail.com> (raw)
In-Reply-To: <4302F0D8.6050409@bigpond.net.au>
Hi,
On 8/17/05, Peter Williams <pwil3058@bigpond.net.au> wrote:
> I was intrigued by the fact that zaphod(d,d) and zaphod(d,0) take longer
> in real time but use less cpu. I was assuming that this meant that some
> other job was getting some cpu but the schedstats data doesn't support
> that. Also it wouldn't make sense anyway as you'd expect jobs doing the
> same amount of work to use roughly the same amount of cpu. My latest
> theory is that your machine has hyper threads and this artifact is
> caused by the mechanism in the scheduler for handling tasks with
> differing priority in sibling hyper thread channels. Does your system
> have hyper threads?
Yes. Please see my first mail:
> info:
> distro: debian 3.1
> cpu: pentium 4 (ht enabled)
Regards,
Michal Piotrowski
next prev parent reply other threads:[~2005-08-17 11:59 UTC|newest]
Thread overview: 34+ messages / expand[flat|nested] mbox.gz Atom feed top
2005-08-15 4:46 [ANNOUNCE][RFC] PlugSched-5.2.4 for 2.6.12 and 2.6.13-rc6 Peter Williams
2005-08-15 12:29 ` Michal Piotrowski
[not found] ` <43012427.9080406@bigpond.net.au>
[not found] ` <4301330B.3070400@bigpond.net.au>
2005-08-16 12:54 ` Michal Piotrowski
2005-08-17 8:00 ` Con Kolivas
2005-08-17 11:23 ` Michal Piotrowski
2005-08-17 12:31 ` Con Kolivas
2005-08-16 21:49 ` Schedulers benchmark - Was: " Michal Piotrowski
2005-08-17 8:10 ` Peter Williams
2005-08-17 9:03 ` Con Kolivas
2005-08-17 18:04 ` Michal Piotrowski
2005-08-17 21:35 ` Con Kolivas
2005-08-17 23:15 ` Peter Williams
2005-08-17 23:16 ` Con Kolivas
2005-08-17 23:48 ` Peter Williams
2005-08-17 23:45 ` Con Kolivas
2005-08-19 3:09 ` Michal Piotrowski
2005-08-19 3:28 ` Lee Revell
2005-08-19 3:41 ` Con Kolivas
2005-08-19 4:41 ` Peter Williams
2005-08-19 4:36 ` Con Kolivas
2005-08-19 20:13 ` Lee Revell
2005-08-20 0:31 ` Con Kolivas
2005-08-20 3:04 ` Lee Revell
2005-08-20 18:52 ` Lee Revell
2005-08-19 4:26 ` Peter Williams
2005-08-17 11:59 ` Michal Piotrowski [this message]
2005-08-21 1:34 ` Michal Piotrowski
2005-08-21 1:47 ` Con Kolivas
2005-08-21 4:16 ` Michal Piotrowski
2005-08-21 4:22 ` Con Kolivas
2005-08-21 4:44 ` Michal Piotrowski
2005-08-21 4:49 ` Con Kolivas
2005-08-21 1:37 ` Michal Piotrowski
[not found] ` <4309125B.4020707@bigpond.net.au>
2005-08-22 11:39 ` Michal Piotrowski
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