Hi all: I found the root cause and got it done. The Ethernet interrupt handler has a potential bug .
Thank you for all your help.. -----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Sylvain Rochet Sent: 2012年5月17日 18:33 To: Mailing list for lwIP users Subject: Re: [lwip-users] lwip whole performance down 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 _______________________________________________ lwip-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/lwip-users
