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List:       net-snmp-users
Subject:    Re: Memory leak in 5.5
From:       kavita raghunathan <kraghuna2000 () yahoo ! com>
Date:       2010-09-27 16:44:24
Message-ID: 138547.60854.qm () web52304 ! mail ! re2 ! yahoo ! com
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You are correct; you got me there. I only looked at the running output. Which already \
had a bunch of initialization leaks which I ignored because that was not my concern - \
my target was the ever increasing leak over time that top reported. But valgrind did \
not report anything overtime, it must be because I did not stop snmpd. 

I will re-run by stopping snmpd and report the output to you. FYI - I'm now running \
with if-mib code mostly removed because I suspect the if-mib; the if-mib is not \
removable from net-snmp to the best of my knowledge. 

Please note that on linux host (not embedded hardware) "top" does not report much of \
a memory leak (its less than 0.1% overnight which is not as alarming as a 50% memory \
consumption while starting at 7% initially).

Kavita

--- On <b>Mon, 9/27/10, Bart Van Assche <i><bvanassche@acm.org></i></b> wrote:
<blockquote style="border-left: 2px solid rgb(16, 16, 255); margin-left: 5px; \
                padding-left: 5px;">
From: Bart Van Assche <bvanassche@acm.org>
Subject: Re: Memory leak in 5.5
To: "kavita raghunathan" <kraghuna2000@yahoo.com>
Cc: net-snmp-users@lists.sourceforge.net
Date: Monday, September 27, 2010, 11:12 AM

<div id="yiv1629996917"><font size="2">On Mon, Sep 27, 2010 at 5:45 PM, kavita
 raghunathan <span dir="ltr"><<a rel="nofollow" \
ymailto="mailto:kraghuna2000@yahoo.com" target="_blank" \
href="/mc/compose?to=kraghuna2000@yahoo.com">kraghuna2000@yahoo.com</a>></span> \
wrote: </font><div class="yiv1629996917gmail_quote"><blockquote \
class="yiv1629996917gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); \
margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">

<table border="0" cellpadding="0" cellspacing="0"><tbody><tr><td style="font-family: \
inherit; font-style: inherit; font-variant: inherit; font-weight: inherit; \
line-height: inherit; font-size-adjust: inherit; font-stretch: inherit;" \
valign="top">

<font size="2">Valgrind found no leaks. I left it over night. But top still reports \
that snmpd is leaking memory. I did do what he suggested. What I'm trying to say is, \
is there any known memory leaks with net-snmp 5.5 ? Has anyone else reported a \
problem ? Google does not show anyone reporting a problem, but maybe you all know of \
one. Should I be trying dmalloc ?


</font></td></tr></tbody></table></blockquote></div><font size="2">
Hello Kavita,

Are you aware that Valgrind only prints a leak report when snmpd stops, not while it \
is running ? After snmpd has been running for a whole night under Valgrind, you \
should stop snmpd and capture the Valgrind output in a file. Analysis of that output \
will tell whether or not there is a leak.



Note: Valgrind will report many "leaks" on snmpd. Not everything that Valgrind \
reports is a bug though - Valgrind also complains when memory is allocated at startup \
but not freed at exit. That is not the same as a memory leak. Careful analysis of the \
Valgrind output is necessary before a conclusion can be drawn.



</font><font size="2">Regarding known bugs in 5.5: please have a look at the Net-SNMP \
5.6.pre3 ChangeLog. All bugs that have been fixed since version 3-0A1 are documented \
in that file.

Bart.
</font>
</div></blockquote>



      

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