Re: [lwip-users] lwip whole performance down

[Sylvain Rochet]

Hi Vincent,


On Thu, May 17, 2012 at 10:15:36AM +0000, vincent cui wrote:
> 
> When lwIP performance goes down, the Ethernet DMA's RX buffer 
> unavailable flag is always set ... don't know why, it seems HW 
> problem.

This is kind of a hazardous way to suspect first a hardware problem 
before checking the software driver.

From here, it looks like a faulty behavior in the DMA interrupt handler 
of your MAC driver.


Sylvain

signature.asc
Description: Digital signature