Re: Chart of wireshark memory usage

[Anders Broman <anders.broman () ericsson com>]

-----Original Message-----
From: wireshark-dev-bounces () wireshark org [mailto:wireshark-dev-bounces () wireshark org] On Behalf Of Jeff Morriss
Sent: den 25 juli 2013 15:28
To: Developer support list for Wireshark
Subject: Re: [Wireshark-dev] Chart of wireshark memory usage

On 07/25/13 08:18, Evan Huus wrote:
> On 2013-07-25, at 12:47 AM, Anders Broman <a.broman () bredband net 
> <mailto:a.broman () bredband net>> wrote:
>
> > Jakub Zawadzki skrev 2013-07-20 16:41:
> > > Hi all,
> > >
> > > Recently I was trying to move io_stat graph functionality to some GtkWidget.
> > > For now I failed, but as a side effect result I've created memory 
> > > usage dialog ;]
> > >
> > > It looks like 
> > > this:http://www.wireshark.org/~darkjames/memory_dlg.png
> > >
> > > Attaching dirty patch (not ready for merging), enjoy.
> > >
> > > Cheers,
> > > Jakub.
> > Hi,
> > I committed the memory_dlg code as I made it work on windows and it 
> > will be easier to collaborate on it in SVN. For the emem patch should 
> > it return both the allocated and used sizes as that would be a more 
> > accurate indication of the memory used by the application.
> >
> > For the function reading the memory used by the application should 
> > that be in it's on section in epan or wsutil if it's useful for other 
> > purposes? Part of the summary information?
> > Regards
> > Anders
>
> If people are interested in pursuing this further, it would be very 
> easy to write a wmem allocator that provides much more detailed 
> statistics (number of allocations by size, for example). Not 
> everything goes though wmem yet, but I'll get there eventually.

I looked at adding some kind of profiling to Wireshark's memory usage some years ago (but lost interest in my method).  
What I *really* wanted to know was "where is the memory going?"  Is it TCP reassembly, frame_data's, or what?  And I 
wanted it to be visible in a normal Wireshark build so if some user complained of high memory usage we could see what, 
in their particular trace file, was causing the usage.

I was thinking that when we have the framework in place we can add queries to read hash table sizes etc, it might not 
give the exact
Memory usage but at least an approximation(Hmm might not work for fragment tables...as the fragment size isn't known). 
Regards
Anders


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