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Date: Thu, 18 Nov 2010 15:12:35 -0800
From: Steve Kargl <sgk@troutmask.apl.washington.edu>
To: Alexander Best <arundel@freebsd.org>
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Cc: FreeBSD Stable <freebsd-stable@freebsd.org>,
	"Matthew D. Fuller" <fullermd@over-yonder.net>,
	FreeBSD Current <freebsd-current@freebsd.org>,
	Andriy Gapon <avg@freebsd.org>, freebsd-performance@freebsd.org,
	"O. Hartmann" <ohartman@zedat.fu-berlin.de>
Subject: Re: TTY task group scheduling
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On Thu, Nov 18, 2010 at 10:59:43PM +0000, Alexander Best wrote:
> 
> well i did exactly what they did in the video. watch a 1080p video and move
> the output window around while compiling the kernel.
> 

It is trivial to bring ULE to its knees.  If you 
have N cores then all you need is N+1 cpu intensive
task.  The issue has been known for a few years.

http://freebsd.monkey.org/freebsd-current/200807/msg00278.html
http://www.mail-archive.com/freebsd-hackers@freebsd.org/msg65839.html

-- 
Steve