[lwip-devel] [bug #26349] Nagle algorithm doesn't send although segment is full

[Simon Goldschmidt]

URL:
  <http://savannah.nongnu.org/bugs/?26349>

                 Summary: Nagle algorithm doesn't send although segment is
full
                 Project: lwIP - A Lightweight TCP/IP stack
            Submitted by: goldsimon
            Submitted on: So 26 Apr 2009 12:06:59 GMT
                Category: TCP
                Severity: 3 - Normal
              Item Group: Faulty Behaviour
                  Status: None
                 Privacy: Public
             Assigned to: None
             Open/Closed: Open
         Discussion Lock: Any
         Planned Release: 
            lwIP version: CVS Head

    _______________________________________________________

Details:

While debugging the fix for bug #24212 (Deadlocked tcp_retransmit due to
exceeded pcb->cwnd), I discovered that the nagle algorithm doesn't send data
(because unsent->next is null) although the unsent segment is as big as it can
get (i.e. 1460 bytes).

My question is: is this OK? Transmission speed would be better when sending
that packet right away, e.g. based on "unsent->len == pcb->mss", since there
is nothing to be improved here.

However, I don't know what the standards say to this, thus this bug entry to
discuss it.




    _______________________________________________________

Reply to this item at:

  <http://savannah.nongnu.org/bugs/?26349>

_______________________________________________
  Nachricht geschickt von/durch Savannah
  http://savannah.nongnu.org/