[lwip-users] Receiving of data slows down / lwIP 1.4.0

2014-03-10 Thread Satz Klauer
Hi, I send larger bunches of data from host to my lwIP-based device, about 300 kBytes at once. Within the receive-callback I process them and then call tcp_recved(). Now I noticed after some hundred of frames receiving slows down (and sending on host side too). This means the receive-callback is n

[lwip-users] Receiving of data slows down / lwIP 1.4.0

2014-03-14 Thread Sergio R. Caprile
Get and install "wireshark" Capture the traffic Look for any unusual TCP stuff (retransmissions, etc) Look for dead times Move a pin on your routines entry point Watch those pins toggling on an oscilloscope. Compare what you see in the scope with the wireshark capture If yo

Re: [lwip-users] Receiving of data slows down / lwIP 1.4.0

2014-03-14 Thread Sergio R. Caprile
Get and install "wireshark" Capture the traffic Look for any unusual TCP stuff (retransmissions, etc) Look for dead times Move a pin on your routines entry point Watch those pins toggling on an oscilloscope. Compare what you see in the scope with the wireshark capture If yo