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[lwip-users] Re: [lwip] Some lwIP findings : ACKs and slow start
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From: |
Chris Borrelli |
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Subject: |
[lwip-users] Re: [lwip] Some lwIP findings : ACKs and slow start |
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Date: |
Wed, 08 Jan 2003 23:15:55 -0000 |
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Adam,
Welcome Back.
I am using 0.5.3.
-Chris
Adam Dunkels wrote:
>Hi!
>
>On Wed, 2002-07-17 at 00:15, Chris Borrelli wrote:
>
>
>>Does anyone know why lwIP sends out ACK segs without data in the payload. I
>>am using an echo server for some tests, and lwIP sends 2x the number of
>>packets it should because it sends empty ACKs...
>>
>>Another thing I noticed is that lwIP echo server and a Windows client have
>>trouble sending large sized segments. The size of the packets ramps up from
>>100 bytes to 500 bytes... then it goes back down to 100 bytes.. here is the
>>situation:
>>
>>
>
>In addition to Kieran's answer - what version of lwIP are you running? I
>guess that there might be a problem in the interaction between the TCP
>reception code and the tcp_recved() function, but I am not sure.
>
>/adam
>
>
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Adam,<br>
<br>
Welcome Back.<br>
<br>
I am using 0.5.3.<br>
<br>
-Chris<br>
<br>
Adam Dunkels wrote:<br>
<blockquote type="cite" cite="address@hidden">
<pre wrap="">Hi!
On Wed, 2002-07-17 at 00:15, Chris Borrelli wrote:
</pre>
<blockquote type="cite">
<pre wrap="">Does anyone know why lwIP sends out ACK segs without data in
the payload. I
am using an echo server for some tests, and lwIP sends 2x the number of
packets it should because it sends empty ACKs...
Another thing I noticed is that lwIP echo server and a Windows client have
trouble sending large sized segments. The size of the packets ramps up from
100 bytes to 500 bytes... then it goes back down to 100 bytes.. here is the
situation:
</pre>
</blockquote>
<pre wrap=""><!---->
In addition to Kieran's answer - what version of lwIP are you running? I
guess that there might be a problem in the interaction between the TCP
reception code and the tcp_recved() function, but I am not sure.
/adam
</pre>
</blockquote>
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