Date: Tue, 18 Oct 2011 17:17:27 +0300 From: Ivan Klymenko <fidaj@ukr.net> To: Andriy Gapon <avg@FreeBSD.org> Cc: freebsd-performance@FreeBSD.org Subject: Re: ffmpeg & ULE Message-ID: <20111018171727.1fad2c7d@nonamehost.> In-Reply-To: <4E9D8747.4020104@FreeBSD.org> References: <4E9D4124.9000307@eenet.ee> <12913.3257120431$1318938804@news.gmane.org> <4E9D7880.1030308@FreeBSD.org> <20111018162609.1319eb44@nonamehost.> <4E9D8747.4020104@FreeBSD.org>
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=D0=92 Tue, 18 Oct 2011 17:03:51 +0300 Andriy Gapon <avg@FreeBSD.org> =D0=BF=D0=B8=D1=88=D0=B5=D1=82: > on 18/10/2011 16:26 Ivan Klymenko said the following: > > =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: > >=20 > >> 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: > >>> > >>>> 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 > >>>> > >>>> > >>> > >>> probably because you have a system processor with 2 cores...? > >>> if yes - then use the 4BSD...it is better for the two cores... > >>> IMHO > >> > >> 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 >=20 > Not sure if two pictures is all that it takes. > There is no description of hardware, OS versions, reproducibility of > the results. Also you made a broader claim like "4BSD ... is better > for the two cores", but the pictures demonstrate only that it is > better (by ~10% ? I hate it when the axises do not start at zero) http://forum.lissyara.su/viewtopic.php?p=3D305269#p305269 > only for transactions/s in postgresql sysbench. There are other > workloads and other important things to measure (like interactivity, > etc). >=20 > Good benchmarking is a real science. >=20 Of course - I understand it. Please tell me what tests should I do? I will give you the test results for review. I also give all the information about the hardware on which the tests were conducted.
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