[Click] Discard and memory usage

[Paine, Thomas Asa]

	I read seen Eddie's post from a few minutes ago.  I'm guessing
this is related to the "large" (and largely understated) memory leak I'm
seeing :) hehe, funny, but a great way to close a Friday!

Thanks, 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
   Thomas Paine (paineta at uwec.edu) 
   University of Wisconsin - Eau Claire 
   garbage foo(garbage g){return(g);} 
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 

-----Original Message-----
From: click-bounces at pdos.csail.mit.edu
[mailto:click-bounces at pdos.csail.mit.edu] On Behalf Of Paine, Thomas Asa
Sent: Friday, June 23, 2006 4:40 PM
To: Click
Subject: [Click] Discard and memory usage

I had a click config that has been running in production for 6 months.
When I added a Tee element, and ran that, the system ran out of ram in a
hurry.  I went back on my R&D box and simply did this...

############################

   tee1::PullTee(2);
   tee2::PullTee(2);
 
   outsideRx::PollDevice(eth1) -> Queue -> tee1[0] ->
insideTx::ToDevice(eth2);
   insideRx::PollDevice(eth2) -> Queue -> tee2[0] ->
outsideTx::ToDevice(eth1);
   tee1[1] -> Discard;
   tee2[1] -> Discard;

############################

It too runs out of ram (testing with 60Kpps into one side)...  If I
remove the Tee/Discards all is well.  Is there a problem with tee or
discard, or am I using it incorrectly?  This was tried on 1.5.0 as well
as a freshened CVS from this morning.  Also, when the click is
uninstalled the, memory is not freed, but yet there is no reported
outstanding "news".  I'm assuming from Tee's description that "Tee sends
a copy of each incoming packet out each output", it means one "copy" is
the original memory space and not two more copies.  Any thoughts?


<removed>/conf# free -m ; date
             total       used       free     shared    buffers
cached
Mem:          2027         64       1962          0          2
38
-/+ buffers/cache:         23       2003
Swap:            0          0          0
Fri Jun 23 13:26:39 CDT 2006


<removed>/conf# click-install tee.click ; date Fri Jun 23 13:26:44 CDT
2006 <removed>/conf# free -m ; date
             total       used       free     shared    buffers
cached
Mem:          2027        131       1895          0          2
38
-/+ buffers/cache:         90       1936
Swap:            0          0          0
Fri Jun 23 13:26:51 CDT 2006


<removed>/conf# free -m ; date
             total       used       free     shared    buffers
cached
Mem:          2027        197       1829          0          2
38
-/+ buffers/cache:        156       1870
Swap:            0          0          0
Fri Jun 23 13:26:57 CDT 2006


<removed>/conf# free -m ; date
             total       used       free     shared    buffers
cached
Mem:          2027        256       1770          0          2
38
-/+ buffers/cache:        215       1811
Swap:            0          0          0
Fri Jun 23 13:27:03 CDT 2006


<removed>/conf# free -m ; date
             total       used       free     shared    buffers
cached
Mem:          2027        344       1682          0          2
38
-/+ buffers/cache:        303       1723
Swap:            0          0          0
Fri Jun 23 13:27:11 CDT 2006


<removed>/conf# free -m ; date
             total       used       free     shared    buffers
cached
Mem:          2027        421       1605          0          2
38
-/+ buffers/cache:        380       1646
Swap:            0          0          0
Fri Jun 23 13:27:18 CDT 2006


<removed>/conf# click-uninstall ; date
Fri Jun 23 13:27:25 CDT 2006


<removed>/conf# free -m
             total       used       free     shared    buffers
cached
Mem:          2027        481       1545          0          2
38
-/+ buffers/cache:        439       1587
Swap:            0          0          0



Thanks,
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~  
   Thomas Paine (paineta at uwec.edu) 
   University of Wisconsin - Eau Claire 
   garbage foo(garbage g){return(g);}
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 

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