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Date: Tue, 18 Oct 2011 16:26:09 +0300
From: Ivan Klymenko <fidaj@ukr.net>
To: Andriy Gapon <avg@FreeBSD.org>
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Cc: freebsd-performance@FreeBSD.org
Subject: Re: ffmpeg & ULE
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=D0=92 Tue, 18 Oct 2011 16:00:48 +0300
Andriy Gapon <avg@FreeBSD.org> =D0=BF=D0=B8=D1=88=D0=B5=D1=82:

> on 18/10/2011 14:30 Ivan Klymenko said the following:
> > =D0=92 Tue, 18 Oct 2011 12:04:36 +0300
> > Urmas Lett <urmas.lett@eenet.ee> =D0=BF=D0=B8=D1=88=D0=B5=D1=82:
> >=20
> >> Hello.
> >>
> >> Why is ffmpeg -threads massively slower with ULE than 4BSD?
> >>
> >> ffmpeg preset veryfast with sched_bsd:
> >> real    1m49.407s
> >> user    6m53.932s
> >> sys     0m1.700s
> >>
> >> ffmpeg preset veryfast with sched_ule:
> >> real    2m52.711s
> >> user    6m50.310s
> >> sys     0m1.582s
> >>
> >> #uname -a
> >> FreeBSD 9.0-RC1 FreeBSD 9.0-RC1 #0: Mon Oct 17 20:32:29 EEST
> >>
> >>
> >=20
> > probably because you have a system processor with 2 cores...?
> > if yes - then use the 4BSD...it is better for the two cores... IMHO
>=20
> Do you have any facts to substantiate your claim?
>=20

well, for example:
http://img37.imageshack.us/img37/9311/plotj.gif
http://img850.imageshack.us/img850/584/plot.gif