Re: [lwip-users] httpd slow response

[Rick Culver]

Kieran,
Thanks for the suggestion.  Attached is a copy of the lwipopt.h file and 
also an Ethereal capture of a simple webpage refresh.  Notice the delays in 
the sequence during the file transfer(s).  Any ideas?
Rick

----- Original Message ----- 
From: "Kieran Mansley" <address@hidden>
To: "Rick Culver" <address@hidden>; "Mailing list for lwIP users" 
<address@hidden>
Sent: Friday, April 24, 2009 10:12 AM
Subject: Re: [lwip-users] httpd slow response


> On Fri, 2009-04-24 at 10:06 -0500, Rick Culver wrote:
> > Bill,
> > As we suspected based on this information, setting the TF_NODELAY flag
> > in the accept callback did not make a difference.  Apparently the
> > problem is somewhere else in the stack but not sure where.  I tried
> > both MSIE and FoxFire browsers, same results.  I just can't figure out
> > why there is so much delay between the http_sent() functions.  It
> > appears that this is somehow related to the lwip either not sending
> > the tcp_write()/tcp_output() immediately or not processing the
> > response packets quickly (or maybe a combination of both).  At any
> > rate it appears that httpd module can only serve up one chunk of the
> > file about every 200msec.  If you think of anything else please let me
> > know.
>
> A copy of your lwipopts.h and a packet capture of the slow transfer can
> often be illuminating in cases like this.
>
> Kieran

httpd-ethereal.cap
Description: Binary data

lwipopts.h
Description: Text document