From: Arjan van de Ven <arjan@infradead.org>
To: "Phil Endecott" <phil_wueww_endecott@chezphil.org>
Cc: "Linux Kernel Mailing List" <linux-kernel@vger.kernel.org>
Subject: Re: nice and hyperthreading on atom
Date: Sat, 6 Sep 2008 09:42:48 -0700 [thread overview]
Message-ID: <20080906094248.5930911a@infradead.org> (raw)
In-Reply-To: <1220715811849@dmwebmail.dmwebmail.chezphil.org>
On Sat, 06 Sep 2008 16:43:31 +0100
"Phil Endecott" <phil_wueww_endecott@chezphil.org> wrote:
> Dear Experts,
>
> I have an ASUS Eee with an Atom processor, which has hyperthreading
> enabled. If I have two processes, one nice and the other normal,
> they each get 50% of the CPU time. Of course this is what you'd
> expect if the scheduler didn't understand that the two virtual
> processors are not really independent. I'd like to fix it.
>
but you cannot imfluence the cpu's scheduling of the instructions.
As an OS one COULD decide to just not schedule the nice task at all,
but then, especially on atom where HT has a high efficiency, your cpu
is mostly idle ...
--
If you want to reach me at my work email, use arjan@linux.intel.com
For development, discussion and tips for power savings,
visit http://www.lesswatts.org
next prev parent reply other threads:[~2008-09-06 16:42 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-06 15:43 Phil Endecott
2008-09-06 16:31 ` Peter Zijlstra
2008-09-06 16:42 ` Arjan van de Ven [this message]
2008-09-06 18:24 ` Phil Endecott
2008-09-06 18:30 ` Ulrich Drepper
2008-09-07 9:34 ` Peter Zijlstra
2008-09-07 13:58 ` Phil Endecott
2008-09-08 1:09 ` Bill Davidsen
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