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[lwip-users] Re: [lwip] lwIP 0.5.2 under heavy use

From: James Roth
Subject: [lwip-users] Re: [lwip] lwIP 0.5.2 under heavy use
Date: Wed, 08 Jan 2003 22:28:17 -0000 
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Kieran Mansley wrote:

>On Wed, 13 Mar 2002, James Roth wrote:
>
>>I increased mem pool #8 so that it no longer runs out.
>>
>>Ok, I turned on stats.  For about the first 5600 hits, the stats for
>>memp #4 look like this:
>>
>>    m->avail: 8
>>    m->used: 2
>>    m->max: 2
>>    m->err: 0
>>    m->reclaimed: 0
>>
>>Then, suddenly:
>>
>>   m->avail: 8
>>   m->used: 7
>>   m->max: 8
>>   m->err: 3
>>   m->reclaimed: 0
>>
>>and boom.   It never recovers.  This always happens about 700 seconds
>>after booting.  A sudden increase of 2 or less m->used to more than 8.
>> Hmmm....
>>
>
>Perhaps the application has just opened a large number of listening
>connections?
>
>However, the m->err: 3 suggests there is something wrong somewhere.  If
>you could work out what was causing these errors you'll probably find your
>problem.  Should be reasonably easy to track down if you're able to use
>some of the tracing (and turning on tracing doesn't make the error
>evaporate!)
>
>Kieran
>
    I increased the pool size to 32 for memp #4.  Now m->err stays at 0 
forever.  But, the same problem happens: 700 secs / 5600 hits.  So, memp 
does not appear to be my real problem.  After failure, the board does 
not respond to pings either.  I will turn on more debug messages and 
keep looking.

    Did anyone get unixsim to work with the 2.4 linux kernel?  I would 
like to try heavy testing under linux.

>
>[This message was sent through the lwip discussion list.]
>

-- 
James Roth <address@hidden>
Shugyo Design Technologies
http://www.shugyodesign.com/



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Kieran Mansley wrote:<br>
<blockquote type="cite" cite="mid:address@hidden">
  <pre wrap="">On Wed, 13 Mar 2002, James Roth wrote:<br></pre>
  <blockquote type="cite">
    <pre wrap="">I increased mem pool #8 so that it no longer runs 
out.<br><br>Ok, I turned on stats.  For about the first 5600 hits, the stats 
for<br>memp #4 look like this:<br><br>    m-&gt;avail: 8<br>    m-&gt;used: 
2<br>    m-&gt;max: 2<br>    m-&gt;err: 0<br>    m-&gt;reclaimed: 
0<br><br>Then, suddenly:<br><br>   m-&gt;avail: 8<br>   m-&gt;used: 7<br>   
m-&gt;max: 8<br>   m-&gt;err: 3<br>   m-&gt;reclaimed: 0<br><br>and boom.   It 
never recovers.  This always happens about 700 seconds<br>after booting.  A 
sudden increase of 2 or less m-&gt;used to more than 8.<br> Hmmm....<br></pre>
    </blockquote>
    <pre wrap=""><!----><br>Perhaps the application has just opened a large 
number of listening<br>connections?<br><br>However, the m-&gt;err: 3 suggests 
there is something wrong somewhere.  If<br>you could work out what was causing 
these errors you'll probably find your<br>problem.  Should be reasonably easy 
to track down if you're able to use<br>some of the tracing (and turning on 
tracing doesn't make the error<br>evaporate!)<br><br>Kieran<br></pre>
    </blockquote>
&nbsp;&nbsp;&nbsp; I increased the pool size to 32 for memp #4. &nbsp;Now 
m-&gt;err stays at
0 forever. &nbsp;But, the same problem happens: 700 secs / 5600 hits. &nbsp;So, 
memp
does not appear to be my real problem. &nbsp;After failure, the board does not
respond to pings either. &nbsp;I will turn on more debug messages and keep 
looking.<br>
    <br>
&nbsp;&nbsp;&nbsp; Did anyone get unixsim to work with the 2.4 linux kernel? 
&nbsp;I would like
to try heavy testing under linux.<br>
    <blockquote type="cite" cite="mid:address@hidden">
      <pre wrap=""><br>[This message was sent through the lwip discussion 
list.]<br></pre>
      </blockquote>
      <br>
      <pre class="moz-signature" cols="$mailwrapcol">-- 
James Roth <a class="moz-txt-link-rfc2396E" 
href="mailto:address@hidden";>&lt;address@hidden&gt;</a>
Shugyo Design Technologies
<a class="moz-txt-link-freetext" 
href="http://www.shugyodesign.com/";>http://www.shugyodesign.com/</a>
</pre>
      <br>
      </body>
      </html>

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