You are right . When lwIP performance goes down, the Ethernet DMA's RX buffer unavailable flag is always set ... don't know why, it seems HW problem. When performance is high, the DMA RX buffer always available.
-----Original Message----- From: [email protected] [mailto:[email protected]] On Behalf Of Sylvain Rochet Sent: 2012年5月17日 18:04 To: Mailing list for lwIP users Subject: Re: [lwip-users] lwip whole performance down Hi Vincent, On Thu, May 17, 2012 at 09:51:55AM +0000, vincent cui wrote: > > It is really odd... This is not. > I enable display lwip stats, it shows that there is packet dropped.. So, lwIP probably knows it had to drop the SYN packet, you only need to find out why. Again, you HAVE TO get and check a TCP trace first in order to be able to know where to look. Sylvain _______________________________________________ lwip-users mailing list [email protected] https://lists.nongnu.org/mailman/listinfo/lwip-users
