[FFmpeg-user] Help with excessive CPU usage

[Loadlinx]

What's very odd is that on server 2 nginx uses 25% of CPU with 7 processes
whereas on server 1 only consumes 6% with 10 ffmpeg processes.


On Wed, Feb 19, 2014 at 2:53 PM, Andy <dssnosher at gmail.com> wrote:

> On Wednesday, February 19, 2014, Reindl Harald <h.reindl at thelounge.net>
> wrote:
>
> >
> >
> > Am 19.02.2014 20:00, schrieb Loadlinx:
> > > On Wednesday, February 19, 2014, Reindl Harald <h.reindl at thelounge.net
> <javascript:;>
> > >
> > > wrote:
> > >
> > >>
> > >>
> > >> Am 19.02.2014 17:01, schrieb Tom Evans:
> > >>> On Wed, Feb 19, 2014 at 3:34 PM, Reindl Harald <
> h.reindl at thelounge.net<javascript:;>
> > <javascript:;>>
> > >> wrote:
> > >>>>
> > >>>> Am 19.02.2014 16:25, schrieb Tom Evans:
> > >>>>> On Wed, Feb 19, 2014 at 2:34 PM, Loadlinx <limiteddi at gmail.com
> <javascript:;>
> > <javascript:;>>
> > >> wrote:
> > >>>>>> Not identical, but 16 cores.
> > >>>>>> server1: E7330
> > >>>>>> server2: E7340 (slightly larger L2)
> > >>>>>>
> > >>>>>> Everything else but CPU is 1:1
> > >>>>>
> > >>>>> So why doesn't your E7340 support SSE4.1?
> > >>>>
> > >>>> why should it?
> > >>>
> > >>> One server runs fast enough for him; on that server ffmpeg reports it
> > >>> is using CPU features SSE 4.1
> > >>>
> > >>> One server does not run fast enough for him; on that server ffmpeg
> > >>> does not use SSE 4.1
> > >>>
> > >>> Don't be so pedantic
> > >>
> > >> thank you for strip the technical informations i posted
> > >> and instead stating that i am pedantic
> > >>
> > >> i used google to search the ark database for you and provided the
> > >> information that this CPU simply has no SSE4.1 capability, frankly
> > >> the E7330 as built by Intel also has *no* SSE4.1 support
> > >>
> > >> https://www.google.at/search?q=ark+englisch+E7330
> > >> Status: End of Life
> > >> Launch Date: Q3'07
> > >> Expected Discontinuance: Q1'2010
> > >> Processor Number: E7330
> > >> Lithography: 65 nm
> > >>
> > >> again http://en.wikipedia.org/wiki/SSE4#SSE4.1
> > >> These instructions were introduced with Penryn microarchitecture,
> > >> the 45 nm shrink of Intel's Core microarchitecture
> > >>
> > >> and no you do not just throw away a CPU like a Xeon-E7 which
> > >> costs around 2000 EURO
> > >>
> > >>
> > > Hard to believe that the process is the issue here. It it simply
> because
> > of
> > > SSE4.1 support?
> >
> > no, it improves performance but for sure not that massive
> > in general i responded to "So why doesn't your E7340 support SSE4.1" with
> > facts
> >
> > what makes me *really* wonder is that ffmpeg pretends that E7330 has
> SSE4.1
> > because as said above this CPU was built before SSE4.1 was introduced at
> > all
> >
> > so that is interesting in case where takes ffmpeg that information, or is
> > it *really* that CPU and what happens if ffmpeg believes for whatever
> > reason a CPU supports SSE4.1 or whatever SIMD instrcutions while it
> > actually does not - normally i would expect a segfault with a error
> > message like "unkown instruction"
> >
> > at least such errors are what i have seen in "-mtune native" builds for
> > several packages trying to run them on a older VNMware host :-)
> >
> >
> Any idea what further troubleshooting steps i could take to see if its CPU?
> It would be a bummer if i had to get an additional box.
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