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Re: [lwip-users] Slow TCP


From: Bernard Mentink
Subject: Re: [lwip-users] Slow TCP
Date: Thu, 3 Mar 2011 08:59:51 +1300

Hi Kieran,

I don't know if you got the attached file of if even this list allows attachments ... but I have managed to get the debugging working out the serial port.

I turned on tcp debugging and got this when I tried to load the web page:

-----------------------------
tcp_slowtmr: no active pcbs // lot's of these
tcp_slowtmr: no active pcbs
tcp_slowtmr: no active pcbs
tcp_slowtmr: no active pcbs
tcp_slowtmr: no active pcbs
TCP connection request 4062 -> 80.
TCP connection established 4062 -> 80.
tcp_recved: recveived 256 bytes, wnd 1024 (0).
tcp_close: closing in State: ESTABLISHED
tcp_pcb_purge
tcp_pcb_purge: data left on ->unacked
tcp_slowtmr: no active pcbs
tcp_slowtmr: no active pcbs
tcp_slowtmr: no active pcbs
tcp_slowtmr: no active pcbs
tcp_slowtmr: no active pcbs
tcp_slowtmr: no active pcbs // more of these
------------------------------------------------------------------

With debugging turned on, the page won't load at all, so it looks like my debugging is interferring with the stack ..

Anyone have any other suggestions?

Cheers,
Bernie

On Tue, Mar 1, 2011 at 10:14 PM, Kieran Mansley <address@hidden> wrote:
On Tue, 2011-03-01 at 11:11 +1300, Bernard Mentink wrote:

>
> I ran a diagnostic session with Colasoft Capsa 7 package and the gist
> of it is below:

I've never heard of that package, so no idea how to interpret its output
or what the different categories mean I'm afraid.  A standard wireshark
packet capture file would be the best way to see what's going on.

Kieran


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