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Date: Fri, 19 Nov 2010 11:37:12 +0200
From: Andriy Gapon <avg@freebsd.org>
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To: Daniel Nebdal <dnebdal@gmail.com>
References: <AANLkTinHSX1+s3hrHyDeU2Vfp6zekTe04XkHhTc2jtLv@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>
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Cc: FreeBSD@freebsd.org, FreeBSD Stable <freebsd-stable@freebsd.org>,
	"Matthew D. Fuller" <fullermd@over-yonder.net>,
	Current <freebsd-current@freebsd.org>,
	Alexander Best <arundel@freebsd.org>, freebsd-performance@freebsd.org,
	"O. Hartmann" <ohartman@zedat.fu-berlin.de>
Subject: Re: TTY task group scheduling
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on 19/11/2010 00:55 Daniel Nebdal said the following:
> On Fri, Nov 19, 2010 at 12:06 AM, Alexander Kabaev <kabaev@gmail.com> wrote:
>> On Thu, 18 Nov 2010 18:56:35 +0000
>> Alexander Best <arundel@freebsd.org> wrote:
>>> well...i tried playing back a 1080p vide files while doing
>>> `make -j64 buildkernel` and FreeBSD's interactivity seems far from
>>> perfect.
>>
>> One thing that just begs to be asked: since when decoding 1080p became
>> an interactive task?
>>
> 
> Strictly speaking it isn't - but displaying it is a timing-sensitive
> task that isn't CPU- or I/O-bound, and scheduling-wise that probably

Well, I am not sure if I can agree about CPU-bound-ness.
Depends on the exact video file, of course, but certain high-quality 1080p are
very CPU intensive unless decoding is offloaded from the CPU.  Depends on
decoder code too.  I had some videos that were CPU-bound on my Athlon II X2 250
with then-version of mplayer from ports.

YMMV.
-- 
Andriy Gapon