Re: [lwip-users] retransmission every 9 pacakets.

[Kieran Mansley]

On Wed, 2007-09-12 at 16:55 +0800, Yang wrote:
> Hi all.
>    I am useing Lwip 1.11 for a few months.It seems to work fine until
> I found it would do a retransmission every 9 tcp packets!. ack was sent
> back every 2 pacakets. 
>    I found out this with ethereal. It seem that after 9 packets, lwip
> stop to send the next packet and wait for an ack until timeout and make 
> a retransmission. I knew that it is some how connected to the 
> TCP_TMR_INTERVAL and TCP_FAST_INTERVAL as it disgussed in this list . 
> I set them as fallow
> #ifndef TCP_TMR_INTERVAL
> #define TCP_TMR_INTERVAL       250  
> #ifndef TCP_FAST_INTERVAL       
> #define TCP_FAST_INTERVAL      TCP_TMR_INTERVAL
>  I had try to set TCP_FAST_INTERVAL  as TCP_TMR_INTERVAL+50( or 100) ,
> the result is same! 

Can you provide a copy of the ethereal trace?

Kieran