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Date: Wed, 21 Mar 2001 16:59:48 +0100
From: Kurt Garloff <garloff@suse.de>
To: Mike Galbraith <mikeg@wen-online.de>
Cc: linux-kernel <linux-kernel@vger.kernel.org>
Subject: Re: Linux 2.4.2 fails to merge mmap areas, 700% slowdown.
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In-Reply-To: <Pine.LNX.4.33.0103210733470.929-100000@mikeg.weiden.de>; from mikeg@wen-online.de on Wed, Mar 21, 2001 at 07:41:55AM +0100
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On Wed, Mar 21, 2001 at 07:41:55AM +0100, Mike Galbraith wrote:
> On 20 Mar 2001, Kevin Buhr wrote:
> >     real    60m4.574s
> >     user    101m18.260s  <-- impossible no?
> >     sys     3m23.520s
>=20
> Why do numbers like this show up?  I noticed some of this after having
> enabled SMP on my UP box.

As you have two CPUs, you can spend more time in CPU than your wall clock
shows if you time multithreaded processes or multiple processes. At most
(ideal case) twice as much.

Regards,
--=20
Kurt Garloff  <garloff@suse.de>                          Eindhoven, NL
GPG key: See mail header, key servers         Linux kernel development
SuSE GmbH, Nuernberg, FRG                               SCSI, Security

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