Date: Fri, 19 Nov 2010 11:37:12 +0200 From: Andriy Gapon <avg@freebsd.org> To: Daniel Nebdal <dnebdal@gmail.com> 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 Message-ID: <4CE64548.4020709@freebsd.org> In-Reply-To: <AANLkTik6pnd-JCjkGZv3Dr7SjfwAgyqM=J8FPotM2-BD@mail.gmail.com> 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> <AANLkTik6pnd-JCjkGZv3Dr7SjfwAgyqM=J8FPotM2-BD@mail.gmail.com>
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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
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