From owner-freebsd-emulation@FreeBSD.ORG  Wed Mar  6 18:02:41 2013
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Subject: Re: 9.1 AMD64 multitasking efficiency low
From: Mike Jakubik <mike.jakubik@intertainservices.com>
To: CeDeROM <cederom@tlen.pl>
Date: Wed, 06 Mar 2013 13:02:29 -0500
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Cc: freebsd-stable@freebsd.org, freebsd-emulation@freebsd.org,
 Christian Gusenbauer <c47g@gmx.at>
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On Wed, 2013-02-13 at 13:30 +0100, CeDeROM wrote:
> On Wed, Feb 13, 2013 at 1:21 PM, Christian Gusenbauer <c47g@gmx.at> wrote:
> > It has something to do with the drive. I've just connected my external drive
> > to the Intel controller and copied some GB of data around without performance
> > impacts! So my new WDC drive works on both the JMicron and the Intel
> > controller.
> 
> On the other hand these drivers work very well on other operating
> systems like WIndows and Linux, so I would rather suspect some
> SCSI/CAM/SATA issues on the FreeBSD side...?
> 

I have the same issues on my system. Whenever heavy IO occurs, such as
extracting a large tar, my desktop (Xorg + KDE4) becomes completely
unusable, i can not even type anything in to an already opened text
editor.