Date: Thu, 18 Nov 2010 15:12:35 -0800 From: Steve Kargl <sgk@troutmask.apl.washington.edu> To: Alexander Best <arundel@freebsd.org> 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 Message-ID: <20101118231235.GA12137@troutmask.apl.washington.edu> In-Reply-To: <20101118225943.GB99684@freebsd.org> References: <AANLkTinHSX1%2Bs3hrHyDeU2Vfp6zekTe04XkHhTc2jtLv@mail.gmail.com> <4CE50849.106@zedat.fu-berlin.de> <4CE52177.3020306@freebsd.org> <20101118182324.GA36312@freebsd.org> <20101118182852.GR63683@over-yonder.net> <20101118185635.GA43706@freebsd.org> <20101118170623.7f9c14f3@kan.dnsalias.net> <20101118225943.GB99684@freebsd.org>
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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
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