[lwip-devel] [bug #42726] reception of TCP ack becomes very slow after a period of time

[Julian Alden-Salter]

URL:
  <http://savannah.nongnu.org/bugs/?42726>

                 Summary: reception of TCP ack becomes very slow after a
period of time
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: julian2002
            Submitted on: Thu 10 Jul 2014 03:50:17 PM GMT
                Category: IPv4
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 
            lwIP version: 1.4.1

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Details:

Hi,
I have an issue where a socket is opened to a server and remains open for long
periods of time. Data is sent and recieved over this socket. After an
indeterminate amount of time the connection becomes very slow.
I am only just starting to trace into this and have just implemented the
percipio tracalyzer to help in debugging.

under normal operation I can see 
RX 1120 bytes
tx 54 bytes
tx 91 bytes
repeat 

under the fail case i see
RX 1120 bytes
tx 54 bytes
tx 91 bytes
rx 60 bytes
tx 91 bytes
repeat

does anyone have any clue as to where to go from here or perhaps a reason for
the issue.





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