udpsrc performance

[parag.salasakar]

Hi

It seems udpsrc/gstrtpjitterbuffer allocate buffers which could be just
byte aligned.
Is there any way I can allocate all buffers (in good plugins) say 4/8/16
byte aligned)?

Like we have HAVE_POSIX_MEMALIGN in gstreamer core, anything similar for
good plugins?

Regards,

Parag

On Wed, Jul 4, 2012 at 3:38 PM, Edward Hervey [via GStreamer-devel] <
ml-node+s966125n4655484h51 at n4.nabble.com> wrote:

> On Wed, 2012-07-04 at 00:01 -0700, parag.salasakar wrote:
> > Hi
> >
> > Thanks for the suggestion.
> >
> > I tried it with udpsrc properties blocksize=50000 buffer-size=50000,
> > but observed same issue (udpsrc taking 35-40%)
> >
> > Does your suggestion mean that I have to modify source code for udpsrc
> > plugin which allocates buffer-pool and re-use them?
>
>   Yes
>
> >
> > Regards,
> >
> > Parag
> >
> > On Mon, Jul 2, 2012 at 8:36 PM, Edward Hervey [via GStreamer-devel]
> > <[hidden email]> wrote:
> >         Hi,
> >
> >         On Mon, 2012-07-02 at 07:45 -0700, parag.salasakar wrote:
> >         > Hi
> >         >
> >         > I am trying to decode MPEG2TS bistream with following
> >         pipeline
> >
> >           I am assuming this is GStreamer 0.10
> >
> >         >
> >         > gst-launch -v udpsrc port=5004 caps="application/x-rtp,
> >         clock-rate=90000,
> >         > media=(string)video" ! gstrtpjitterbuffer ! queue !
> >         rtpmp2tdepay !
> >         > mpegtsdemux ! queue ! ffdec_mpegvideo ! videoscale !
> >         ffmpegcolorspace !
> >         > autovideosink on my DSP  platform
> >         >
> >         > However i noticed that when I try
> >         >
> >         > gst-launch -v udpsrc port=5004 caps="application/x-rtp,
> >         clock-rate=90000,
> >         > media=(string)video" ! fakesink silent=1
> >         >
> >         > CPU utilization goes to 35% to 40% for 4 Mbps streams, which
> >         sounds weired
> >         > to me (how can just udpsrc take 35% of CPU?)
> >         > AM I missing anything?
> >           This is due to the overhead of creating/destroying plenty of
> >         small
> >         GstBuffers. A solution would be to create a bufferpool and
> >         re-use
> >         GstBuffers.
> >
> >             Edward
> >
> >         > Parag
> >         >
> >         > --
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