[vlc] Re: trouble streaming with udp (http works)

[Michael S. Zick]

On Mon August 9 2004 01:33, Andrew Pimlott wrote:
> On Sun, Aug 08, 2004 at 10:59:47AM +0200, Benjamin PRACHT wrote:
> > On Sat, Aug 07, 2004, Andrew Pimlott wrote :
> > > I've very excited to have this working!  I hope someone can either
> > > figure out what was wrong with the deinterlace option, or update the
> > > HOWTO.
> > 
> > Could you check the CPU load when using deinterlace ? This option
> > requires some extra CPU power. 
------ 
> with and without deinterlace (as before, without works fine).
> Curiously, without deinterlace seems to take more processor.  Typical
> output from top with deinterlace:
> 
>     Cpu(s): 23.0% us,  4.8% sy,  0.0% ni, 71.7% id,  0.2% wa,  0.2% hi, 0.2% si
> 
> and without:
> 
>     Cpu(s): 39.8% us,  4.6% sy,  0.0% ni, 55.2% id,  0.0% wa,  0.2% hi,  0.2% si
> 
> The server has two 500 MHz Celerons.  However, I don't know how reliable
> these numbers are, because no process is listed as consuming any
> significant CPU, and vlc is listed as taking none.  This is a Debian
> unstable system running Debian kernel 2.6.7-1-686-smp.
> 
I run a simlar system - I also wonder about the numbers reported.
In top, enter: '1'
To toggle between single set of numbers and numbers per cpu.

Also:
>cat /proc/interrupts
Mine shows all interrupts being serviced by a single cpu - the OS
should distribute interrupts among the cpus.

Also my systems, which use bus-mastering network interfaces,
does net i/o much, much slower than expected.

So either the numbers shown on 2.6.x are really wrong; or the
cpu load sharing and scheduling is really screwed.

You might try booting a non-smp version of the kernel and
see if you get better performance one 1 cpu.
(note: a single, 500mhz, x86 cpu is hard put to do real time
transcoding)

Mike

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