[Ns-developers] [NS-Developers] Bug in ns-2.33 mac-802_11Ext

[lucaanchora@virgilio.it]

Hi all,
I am using ns-2.33 for some simulations in a vehicular 
environment. The
MAC I am using is mac-802_11Ext and the PHY layer is 
wireless-phyExt.
While running a simple simulation of 50 seconds with a 
50 nodes scenario,
I have noticed that the memory usage of my laptop 
(1GB RAM) grown 
until 40%. I have conducted a profiling activity using 
valgrind tool and I
have noticed that in Mac802_11Ext and TXC classes 
there is a problem
of memory deallocation: for BROADCAST transmissions 
the sender keeps
a pointer to the pkt just sent (TXC::pDATA field) and 
never deallocate it, even
when the PHY layer notifies the MAC that the 
transmission si done (by calling
the function handleTXEndIndication()). 
I put the instruction 
Packet::free(pDATA);
in the function void TXC::
handleTXConfirm() just before the instruction
mac_->bkmgr.handleBKStart
(mac_->cw_);
to address the problem and I have obtained no errors and a 
reduction of
the  memory usage.

Do you think this is a real problem, 
or am I wrong??

Bye
Luca Anchora