[Savannah-help-public] [sr #107915] Lwip-1.3.2: TCP Timer tick modifcation problem

[anonymous]

URL:
  <http://savannah.gnu.org/support/?107915>

                 Summary: Lwip-1.3.2: TCP Timer tick modifcation problem
                 Project: Savannah Administration
            Submitted by: None
            Submitted on: Wed 21 Dec 2011 12:11:12 PM UTC
                Category: None
                Priority: 5 - Normal
                Severity: 4 - Important
                  Status: None
             Assigned to: None
        Originator Email: address@hidden
        Operating System: None
             Open/Closed: Open
         Discussion Lock: Any

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Details:

Hi,

I'm using Lwip 1.3.2.

While receiving the TCP data, our device send the acknowledge immediately 
but sometime acknowledge was sent somewhere after 200 or 250 msec. I have 
seen that delayed acknowledge is processed thorugh "tcp_fasttmr()" function, 
which is called every after 250msec. But i need to send the delayed 
acknowledge within 30msec, so for this i have modified the TCP_TMR_INTERVAL 
value from 250 to 30 msec. Now the delayed acknowledge is sent within 30msec 
duration, but it afects the Web server i.e. web page is not loaded fully and 
timeout immediatly.
Can anyone please tell me what other features will affect if 
TCP_TMR_INTERVAL is reduced to 30msec. OR please suggest me some other 
option for delayed acknowledge processing in faster time.

Regards,
Niraj K Singh 





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