Re: GSW and performance

Hi,

In the case of LOSS option in Feedback packet,  if there is a large number 
of
sequential packet drops, then the gsw size should be increased accordingly 
to minimize 
the losses at decompressor.

But, 
If we increase the size to a large value (example - 50 or more), then it 
will take
lot of time(processing cycles/cpu cycles) to operate(Encoding) on the gsw 
as it 
has to consider all the values inside the window .

So, what could be the optimal gsw size such that it does not affect the 
performance(processing cycles/cpu cycles) and also the packet drops.

Thx in advans,
Karthik Balaguru





Carsten Bormann <[email protected]> 
04/27/2009 08:31 PM

To
Karthik Balaguru <[email protected]>
cc
[email protected]
Subject
Re: [rohc] GSW and performance






> Increasing the GSW size could reduce the performance.
> So, What could be the optimal GSW size for good performance while 
> considering the Feedback options w.r.t the LOSS Option ?

Karthik,

I don't think you will get good input from your two-liner questions.
You need to explain more of the context you are coming from and what 
problem you are trying to solve.
It may help to read:
   http://www.catb.org/~esr/faqs/smart-questions.html

How much sliding window your compressor needs depends a lot on what 
your compressor does.
Section 6 of RFC 3095 is about implementation issues, please read again:

6.  Implementation issues

    This document specifies mechanisms for the protocol and leaves many
    details on the use of these mechanisms to the implementers.  This
    chapter is aimed to give guidelines, ideas and suggestions for
    implementing the scheme.

Section 5.7.6.9 tells you a lot about how the information in the LOSS 
option could be used by the compressor.

Gruesse, Carsten


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