TTY task group scheduling

[Andriy Gapon]

on 19/11/2010 00:55 Daniel Nebdal said the following:
> On Fri, Nov 19, 2010 at 12:06 AM, Alexander Kabaev <kabaev at gmail.com> wrote:
>> On Thu, 18 Nov 2010 18:56:35 +0000
>> Alexander Best <arundel at 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