Re: [lwip-users] ping flood crash

[FreeRTOS Info]

> why ? and how to check it?

...because you said the error was "temac error interrupt: rx fifo over 
run".  So presumably the driver is using a FIFO to store received 
packets, but the rate at which packets have been received was too fast 
for the CPU to process, so the FIFO became full and the driver returned 
an error.  Therefore the problem occurred in the driver, before the 
packets were ever sent to lwIP.  This is a perfectly legitimate 
scenario, and not really an error.  If there is no space to store the 
packets then the packets will have to be dropped.  If the dropped 
packets contained TCP data then the TCP protocol will take care of 
ensuring they get re-sent.  If the dropped packets contained UDP data 
then you lucked out - if they need to be re-sent then that has to be 
done from the application level.

Regards,
Richard.

+ http://www.FreeRTOS.org
Designed for microcontrollers. More than 107000 downloads in 2013.

+ http://www.FreeRTOS.org/plus
IoT, Trace, Certification, FAT FS, TCP/IP, Training, and more...