Re: [lwip-users] recv ok.. send is super slow

[Kieran Mansley]

On Sat, 2008-05-10 at 15:10 -0400, Rishi Khan wrote:
> I am trying to test the performance of the lwip stack between two  
> linux machines. If the server is lwIP, the performance is on par with  
> the linux IP stack. If the client is lwIP, it is super slow. It seems  
> that lwIP only sends data after a long timeout (it does not seem tied  
> to tcp_slow/fast_tmr). Also, in the linux/linux case, the CPU  
> utilization goes way up, but in the lwip-to-linux, the CPU says low.  
> Is there any easy way to change this behavior? Attached is a simple  
> example code.

A short packet capture (e.g. using wireshark) in the slow case would be
helpful.

Kieran