From: Ming Zhang <blackmagic02881@gmail.com>
To: "BERTRAND Joël" <joel.bertrand@systella.fr>
Cc: iscsitarget-devel@lists.sourceforge.net, linux-raid@vger.kernel.org
Subject: Re: Abort Task ?
Date: Fri, 19 Oct 2007 10:53:29 -0400 [thread overview]
Message-ID: <1192805609.3593.10.camel@dhcp-117.ibrix.com> (raw)
In-Reply-To: <4718C37F.3050406@systella.fr>
On Fri, 2007-10-19 at 16:47 +0200, BERTRAND Joël wrote:
> Ming Zhang wrote:
> >
> > as Ross pointed out, many io pattern only have 1 outstanding io at any
> > time, so there is only one work thread actively to serve it. so it can
> > not exploit the multiple core here.
> >
> >
> > you see 100% at nullio or fileio? with disk, most time should spend on
> > iowait and cpu utilization should not high at all.
>
> With both nullio and fileio...
it is weired. with file io, run some io load, then run "vmstat 1" and
post here. supposed to see some iowait instead of high sys cpu usage...
--
Ming Zhang
@#$%^ purging memory... (*!%
http://blackmagic02881.wordpress.com/
http://www.linkedin.com/in/blackmagic02881
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next prev parent reply other threads:[~2007-10-19 14:53 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <471720F1.40409@systella.fr>
[not found] ` <471727F3.2080500@systella.fr>
[not found] ` <471734C5.8090405@systella.fr>
[not found] ` <E2BB8074E5500C42984D980D4BD78EF9017A2958@MFG-NYC-EXCH2.mfg.prv>
[not found] ` <1192721909.3596.15.camel@dhcp-117.ibrix.com>
2007-10-18 16:33 ` Abort Task ? BERTRAND Joël
2007-10-18 17:14 ` BERTRAND Joël
2007-10-18 21:03 ` Ross S. W. Walker
2007-10-18 21:35 ` [Iscsitarget-devel] " Ming Zhang
2007-10-19 7:48 ` BERTRAND Joël
2007-10-19 13:55 ` Ming Zhang
2007-10-19 14:30 ` BERTRAND Joël
2007-10-19 14:37 ` Ming Zhang
2007-10-19 14:47 ` BERTRAND Joël
2007-10-19 14:53 ` Ming Zhang [this message]
2007-10-19 14:51 ` [Iscsitarget-devel] " Ross S. W. Walker
2007-10-18 17:30 ` Ming Zhang
2007-10-19 12:25 Ross S. W. Walker
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