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Alberto,

bundling generally implies that the implementation wait some
time before data is sent. If, during that time another chunk
is sent by the application, it may be bundled.
If, however, the application does not send any data within that
time, no bundling is used, but performance may be worse, because
of the additional delay.

Now, actually that is a matter of the API.

And this is a question to the list: are there any suggestions/
comments as to how that might be handled ?

Regards,

Andreas


On Saturday, 16. March 2002 10:34, Alberto Bellettato wrote:
> I am testing the multi-streaming feature and I think that the absence of
> head-of-line blocking within streams should give better performances in
> case of bundling utilization (but only if chunks with _different_ stream ID
> are bundled inside of the same SCTP packet ).
> For this reason I need to understand exacly when bundling is used
> (unfortunately I could not extrapolate the implementation's logic from
> Ethereal logs).
> For this multi-streaming test, I would need that bundling is always used to
> get top performances. But, setting SCTP_BUNDLING_ENABLED, bundling is _not_
> always used. Then, under what conditions is it not used?
>
> Best Regards,
> Alberto
>
> > From: Tuexen Michael
> > <Michael.Tuexen AT icn.siemens.de>
> > To:
> > "'discussion AT sctp.de'"
> >
> > <discussion AT sctp.de>
> > Cc: "'Alberto Bellettato'"
> > <alberto.bellettato AT icn.siemens.it>
> > Subject: RE: [SCTP-Discussion] Bundling
> > Date: Thu, 14 Mar 2002 15:23:09 +0100
> > Reply-To:
> > discussion AT sctp.de
> >
> > Hi Alberto,
> >
> > we provide to constants:
> > SCTP_BUNDLING_ENABLED
> > SCTP_BUNDLING_DISABLED
> >
> > These affect the initial sending of there is not flowcontrol
> > or congestioncontrol active which delays the sending. In case
> > of retransmissions or delayed sending bundling can occur if
> > it results in better protocol performance.
> > Even if you set SCTP_BUNDLING_DISABLED the DATA chunk may
> > be bundled on retransmissions.
> >
> > Why do you need this behaviour for testing? It should only be
> > avoided that SCTP restricts the protocol performance unnecessary
> > by waiting for data for bundling.
> >
> > Best regards
> > Michael
>
> _______________________________________________
> discussion mailing list
> discussion AT sctp.de
> http://www.sctp.de/mailman/listinfo/discussion

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Dipl.-Ing. Andreas Jungmaier | _
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• [SCTP-Discussion] Re: Bundling, Alberto Bellettato, 03/16/2002
  • Re: [SCTP-Discussion] Re: Bundling, Andreas Jungmaier, 03/18/2002

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