From: christophe barbe <christophe.barbe@lineo.fr>
To: Paul Jakma <paulj@itg.ie>
Cc: linux-kernel@vger.kernel.org
Subject: Re: uninteruptable sleep (D state => load_avrg++)
Date: Wed, 4 Apr 2001 17:15:42 +0200 [thread overview]
Message-ID: <20010404171542.A14461@pc8.inup.com> (raw)
In-Reply-To: <20010404164858.A14009@pc8.inup.com> <Pine.LNX.4.33.0104041548120.1150-100000@rossi.itg.ie>
In-Reply-To: <Pine.LNX.4.33.0104041548120.1150-100000@rossi.itg.ie>; from paulj@itg.ie on mer, avr 04, 2001 at 17:05:05 +0200
On mer, 04 avr 2001 17:05:05 Paul Jakma wrote:
> imagine a box with a bunch of processes that do almost nothing but
> call on the kernel to do IO. If you only count the runnable state
> towards load_avg then your load_avg will be very low, even though your
> box is swamped - you are ignoring the work of the kernel.
>
> if you count D towards load_avg then it will reflect this abstract
> 'load' concept more accurately.
>
> Ie, counting D towards load_avg is a way of taking kernel IO work into
> account when calculating the load average figures.
ok I'm convinced.
And a measure can't be perfect.
Thank you,
Christophe
--
Christophe Barbé
Software Engineer
Lineo High Availability Group
42-46, rue Médéric
92110 Clichy - France
phone (33).1.41.40.02.12
fax (33).1.41.40.02.01
www.lineo.com
next prev parent reply other threads:[~2001-04-04 15:11 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-04-03 16:40 uninteruptable sleep Manfred Spraul
2001-04-04 7:47 ` uninteruptable sleep (D state => load_avrg++) christophe barbe
2001-04-04 11:15 ` Alan Cox
2001-04-04 12:13 ` christophe barbe
2001-04-04 12:53 ` Alan Cox
2001-04-04 14:20 ` Paul Jakma
2001-04-04 14:48 ` christophe barbe
2001-04-04 15:05 ` Paul Jakma
2001-04-04 15:15 ` christophe barbe [this message]
2001-04-04 22:39 ` Tim Wright
2001-04-04 16:07 ` uninteruptable sleep christophe barbe
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