ffmpeg & ULE

[Ivan Klymenko]

В Tue, 18 Oct 2011 18:02:40 +0300
Andriy Gapon <avg at FreeBSD.org> пишет:

> on 18/10/2011 17:38 Ivan Klymenko said the following:
> > В Tue, 18 Oct 2011 17:22:29 +0300
> > Andriy Gapon <avg at FreeBSD.org> пишет:
> > 
> >> on 18/10/2011 17:17 Ivan Klymenko said the following:
> >>> В Tue, 18 Oct 2011 17:03:51 +0300
> >>> Andriy Gapon <avg at FreeBSD.org> пишет:
> >>>
> >>>> on 18/10/2011 16:26 Ivan Klymenko said the following:
> >>>>> В Tue, 18 Oct 2011 16:00:48 +0300
> >>>>> Andriy Gapon <avg at FreeBSD.org> пишет:
> >>>>>
> >>>>>> on 18/10/2011 14:30 Ivan Klymenko said the following:
> >>>>>>> В Tue, 18 Oct 2011 12:04:36 +0300
> >>>>>>> Urmas Lett <urmas.lett at eenet.ee> пишет:
> >>>>>>>
> >>>>>>>> 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?
> >>>>>>
> >>>>>
> >>>>> well, for example:
> >>>>> http://img37.imageshack.us/img37/9311/plotj.gif
> >>>>> http://img850.imageshack.us/img850/584/plot.gif
> >>>>
> >>>> 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=305269#p305269
> >>>
> >>>> only for transactions/s in postgresql sysbench.  There are other
> >>>> workloads and other important things to measure (like
> >>>> interactivity, etc).
> >>>>
> >>>> Good benchmarking is a real science.
> >>>>
> >>> 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.
> >>
> >> That's a problem for me - I am not an expert in this area and have
> >> very little experience doing formal performance testing.
> >>
> > 
> > So how can I convince you to confirm that I am right?
> 
> Right about what?
> I do not think that your postgresql tests (with about ~10% of maximal
> difference for a particular configuration) provide any insight into
> the reported ffmpeg results that started this topic.
> 

What tests should I do with ffmpeg?