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Re: [lwip-users] ping flood crash

From: mobin.seven
Subject: Re: [lwip-users] ping flood crash
Date: Wed, 10 Sep 2014 04:20:27 -0700 (MST)

FreeRTOS info wrote
>> 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.
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Thanks. a lot of good information.
you are right . there's a patch in xilinx site around this issue.

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