Re: [B.A.T.M.A.N.] Memory leak

[Axel Neumann <axel@open-mesh.net>]

Hi,

perhaps the problem is not related to 2.4/2.6 kernels but to the thread 
implementation of ulibc (used by openWrt). On your notebook you are probably 
running glibc. Glibc correctly shows only one process and not one per running 
thread.

The changing PID might be because of the tunnel thread which is restarted when 
(re-)connecting to a GW. 

I could not reproduce the high memory consumption but recognized that memory 
usage increases slightly (e.g. when opening a verbose debug-level) and never 
decreases again to its old value. I thought the used memory (as indicated by 
ps and friends) is not freed until required by another program.

ciao,
axel

On Freitag 04 Januar 2008, Freifunk Dresden wrote:
> Hello,
>
> I have a problem where batman (rev871 and rev908) consumes more and
> more memory
> until the router has no memory.
> I  have added the output of the "top" command and the command line
> arguments of my setup.
>
> (WRT 10-1).....wlan.......(wrt 10-2) =======tinc vpn=====(laptop debian
> 0-1) kernel 2.4.32              kernel 2.4.32                  kernel 2.6
>
>
> I have seen that one batman thread changes the PID where the other
> stay the same.
> Below you will find the "top" output for batmand when it was started and
> after about one hour.
> The batmand running on kernal 2.6 does not increment its memory needs.
> Perhaps there are some allocation of memory that is not freed because of
> the arguments of the batmand.
> There is no special traffic on those nodes, they just are connected.
>
> Any Ideas?
> Regards
>   Stephan
>
> linux 2.6. (0-1)
> /usr/bin/batmand -g 1024/200 -a 104.61.0.0/16 -a 141.56.20.5/32 -s
> 10.12.0.1 --no-unreachable-rule
> --no-throw-rules --no-prio-rules --resist-blocked-send wifi tbb /t 1 /i /A
> wifi is a unused bridge
> 1 batmand
>    PID USER      PR  NI  VIRT  RES  SHR S %CPU %MEM    TIME+  COMMAND
>   6612 root      15   0 19136  684  532 S  0.3  0.1   0:27.85 batmand
>
> ####################################################################
>
> linux 2.4.32 (wrt GL 10-2)
> /sbin/batmand -s 10.12.0.1 -a 10.12.10.16/28 -r 2 --t 63
> --no-unreachable-rule --no-throw-rules --no-prio-rules
>   --resist-blocked-send eth1 tbb /t 1 /i /A
>
> 3 batmands
>    PID  PPID USER     STAT   VSZ %MEM %CPU COMMAND
>    847   846 root     S     1196   4%   0% /sbin/batmand -s 10.12.0.1
> -a 10.12.10.16/28 -r 2 --t 63 --no-unreachable-rule
>   3937   847 root     S     1196   4%   0% /sbin/batmand -s 10.12.0.1
> -a 10.12.10.16/28 -r 2 --t 63 --no-unreachable-rule
>    848   847 root     S     1196   4%   0% /sbin/batmand -s 10.12.0.1
> -a 10.12.10.16/28 -r 2 --t 63 --no-unreachable-rule
> ----------
>    848   847 root     S     2076   7%   0% /sbin/batmand -s 10.12.0.1
> -a 10.12.10.16/28 -r 2 --t 63 --no-unreachable-rule
>    847   846 root     S     2076   7%   0% /sbin/batmand -s 10.12.0.1
> -a 10.12.10.16/28 -r 2 --t 63 --no-unreachable-rule
> 22570   847 root     S     2076   7%   0% /sbin/batmand -s 10.12.0.1
> -a 10.12.10.16/28 -r 2 --t 63 --no-unreachable-rule
>
>
> ####################################################################
>
> linux 2.4.32 (wrt GL 10-1)
> /sbin/batmand -s 10.12.0.1 -a 10.12.10.0/28 -r 2 --t 63
> --no-unreachable-rule --no-throw-rules --no-prio-rules
> --resist-blocked-send eth1
>
> 4 batmands
>    PID  PPID USER     STAT   VSZ %MEM %CPU COMMAND
>    837     1 root     S     1292   9%   0% /sbin/batmand -s 10.12.0.1
> -a 10.12.10.0/28 -r 2 --t 63 --no-unreachable-rule -
>    838   837 root     S     1292   9%   0% /sbin/batmand -s 10.12.0.1
> -a 10.12.10.0/28 -r 2 --t 63 --no-unreachable-rule -
> 11854   838 root     S     1292   9%   0% /sbin/batmand -s 10.12.0.1
> -a 10.12.10.0/28 -r 2 --t 63 --no-unreachable-rule -
>    839   838 root     S     1292   9%   0% /sbin/batmand -s 10.12.0.1
> -a 10.12.10.0/28 -r 2 --t 63 --no-unreachable-rule -
> ---------
>    837     1 root     S     2172  15%   0% /sbin/batmand -s 10.12.0.1
> -a 10.12.10.0/28 -r 2 --t 63 --no-unreachable-rule -
>    838   837 root     S     2172  15%   0% /sbin/batmand -s 10.12.0.1
> -a 10.12.10.0/28 -r 2 --t 63 --no-unreachable-rule -
> 30544   838 root     S     2172  15%   0% /sbin/batmand -s 10.12.0.1
> -a 10.12.10.0/28 -r 2 --t 63 --no-unreachable-rule -
>    839   838 root     S     2172  15%   0% /sbin/batmand -s 10.12.0.1
> -a 10.12.10.0/28 -r 2 --t 63 --no-unreachable-rule -
>
>
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