[c-nsp] Cisco DSLAM memory leak possible

Rodney Dunn rodunn at cisco.com
Tue Aug 9 07:51:24 EDT 2005


For leaks you reboot.
After the box is up and stable you watch the Free.
You watch it over time and if it keeps going down
with no logical reason (more users connecting, more
routes, etc..) you probably have a leak.

To debug you get:

sh proc mem sort

and

sh proc mem <PID> for the process that keeps increasing and
open a TAC case.

On Tue, Aug 09, 2005 at 02:33:11PM +0300, Kim Onnel wrote:
> Hi,
> 
> Can i assume that from this log 
> 
>    0   0   44084508   32639164     486224    1506544     712800 *Dead*   
> 
> that i have a memory leak ?      
> 
> dsl01#sh proc memory 
> Total: 33678752, Used: 18635464, Free: 15043288
>  PID TTY  Allocated      Freed    Holding    Getbufs    Retbufs Process
>    0   0     148756       1848    4972520          0          0 *Init*          
>    0   0       1176    4513336       1176          0          0 *Sched*         
>    0   0   44084508   32639164     486224    1506544     712800 *Dead*          
>    1   0          0          0       6828          0          0 Chunk Manager   
>    2   0        188        188       3828          0          0 Load Meter      
>    3   2     251380     248644      14776          0          0 Virtual Exec    
>    4   0          0          0       6828          0          0 Check heaps     
>    5   0       3088       3088       6828          0          0 Chunk Manager   
>    6   0      15036     162060      11304      10152      74112 Pool Manager    
>    7   0        188        188       6828          0          0 Timers          
>    8   0         84        140       6912          0          0 ARP Input       
>    9   0        188        188       6828          0          0 Serial Backgroun
>   10   0     188640     302124     153084          0     112320 Entity MIB API  
>   11   0        188        188       6828          0          0 DDR Timers      
>   12   0        188        188      12828          0          0 Dialer event    
>   13   0          0          0       6828          0          0 IPC Zone Manager
>   14   0          0          0       6828          0          0 IPC Periodic Tim
>   15   0          0          0       6828          0          0 IPC Deferred Por
>   16   0          0          0       6828          0          0 IPC Seat Manager
>   17   0          0          0       6828          0          0 HC Counter Timer
>   18   0          0          0       6828          0          0 SERIAL A'detect 
>   19   0   12495052     420092   10388656     761400          0 C6100 IPC MSG Pr
>   20   0          0          0       6828          0          0 Critical Bkgnd  
>   21   0     888100     536776      16012          0          0 Net Background  
>   22   0        188        188      12828          0          0 Logger          
>   23   0      26116        652       6916          0          0 TTY Background  
>   24   0       1672       5852       9828          0          0 Per-Second Jobs 
>   25   0       4936     178688      11576          0          0 State transition
>   26   0          0          0       6828          0          0 c6100_isr_ehsa_p
>   27   0    4516928     618492      10172       3900     734400 SMB Input       
>   28   0      22260          0      11268       5460          0 SMB0 wire driver
>   29   0          0          0       6828          0          0 SMB0 Input      
>   30   0         88          0       6916          0          0 rf task         
>   31   0          0          0       6828          0          0 c6100_dual_ni2  
>   32   0          0          0       6828          0          0 Net Input       
>   33   0        188        188       6828          0          0 Compute load avg
>   34   0          0      29164       6828          0          0 Per-minute Jobs 
>  PID TTY  Allocated      Freed    Holding    Getbufs    Retbufs Process
>   35   0          0          0       6828          0          0 IDSL timers     
>   36   0          0          0       6828          0          0 c6100 card poll 
>   37   0          0          0       3828          0          0 Per VC Counter  
>   38   0        188        188      12828          0          0 ATM OAM Input   
>   39   0        188        188      12828          0          0 ATM OAM TIMER   
>   40   0          0          0       9828          0          0 ATM Periodic    
>   41   0          0          0       6828          0          0 ATM ARP INPUT   
>   42   0          0          0       6828          0          0 idt252 raw cell 
>   43   0     288724        188      10528     242364          0 OIR process     
>   44   0    1383540    1359968      10452          0          0 EnvMon          
>   45   0        188        188       6828          0          0 AAA Dictionary R
>   46   3      15768      12020      17180          0          0 Virtual Exec    
>   47   0    3825728       3540    1332092          0          0 IP Input        
>   48   0        188        188      12828          0          0 ATM Input       
>   49   0        188        188      12828          0          0 ATM Output      
>   50   0        188        188       6828          0          0 ATM-RT Backgroun
>   51   0          0          0       6828          0          0 PPPATM Session d
>   52   0        188        188      12828          0          0 PASVC create VA 
>   53   0     235672        188      26808      20280          0 SMB wire driver 
>   54   0        460          0      10288          0          0 IP Background   
>   55   0        152          0       9980          0          0 IP RIB Update   
>   56   0          0    1925760      12828          0          0 TCP Timer       
>   57   0     229440          0      15796          0          0 TCP Protocols   
>   58   0          0          0       6828          0          0 Probe Input     
>   59   0          0          0       6828          0          0 RARP Input      
>   60   0          0          0       6828          0          0 HTTP Timer      
>   61   0          0          0       6828          0          0 Socket Timers   
>   62   0      29332        188      22316          0          0 DHCPD Receive   
>   63   0          0    2486636       6828          0          0 IP Cache Ager   
>   64   0          0          0       6828          0          0 PPP IP Add Route
>   65   0          0          0       6828          0          0 SNMP Timers     
>   66   0        188        188      12828          0          0 ILMI Input      
>   67   0     968432     699876       7056          0          0 ILMI Request    
>   68   0     229156     642636       7412          0          0 ILMI Response   
>   69   0     279844     135936       6828          0          0 ILMI Timer Proce
>   70   0          0          0       6828          0          0 Resource Mgmt ba
>   71   0        188        188       6828          0          0 ATMCORE OAM Proc
>   72   0        188        188       6828          0          0 ATMCORE OAM Ping
>   PID TTY  Allocated      Freed    Holding    Getbufs    Retbufs Process
>   73   0        188        188       6828          0          0 SSCOP Input     
>   74   0        188        188       6828          0          0 SSCOP Output    
>   75   0        188        188       6828          0          0 SSCOP Timer     
>   76   0        188        188      12828          0          0 ATMSIG Timer    
>   77   0        188        188      12828          0          0 ATMSIG Input    
>   78   0     102100     480976     114740          0          0 ATMSIG Client   
>   79   0        188        188      12828          0          0 ATMSIG CC       
>   80   0        188        188      12828          0          0 ATMSIG Output   
>   81   0        188        188       6828          0          0 ATM Soft VC Time
>   82   0        188        188       6828          0          0 ATM Rerouting Ti
>   83   0      57740     198164      42160          0          0 PNNI Control    
>   84   0        188        188       6828          0          0 Adj Manager     
>   85   0        188        188       6828          0          0 FRATM IWF       
>   86   0        188        188       6828          0          0 TC-ATM Proc     
>   87   0        188        188       6828          0          0 Tag Input       
>   88   0        188        188       6828          0          0 Tag Input       
>   90   0         68          0       6896          0          0 CDCP Entity Hand
>   91   0          0          0       6828          0          0 Syslog Traps    
>   92   1    7503272    7507888      16416          0          0 Exec            
>   93   0          0          0       6828          0          0 SNMP Manager    
>   94   0     442680       2120      13540          0          0 IP SNMP         
>   95   0    1166892          0      12828          0          0 PDU DISPATCHER  
>   96   0     271180    1877920      12828          0          0 SNMP ENGINE     
>   97   0          0          0       6828          0          0 SNMP Proxy Forwa
>   98   0        188        188       6828          0          0 ATMACCT_RLOG Pro
>   99   0        188        188      12828          0          0 ACCT Process    
>  100   0    4217948    4214280       7008          0          0 AAA Accounting  
>  101   0          0          0       6828          0          0 DHCPD Timer     
>  102   0        188          0       7016          0          0 DHCPD Database  
>  103   0          0          0       6828          0          0 PNNI Hello  01  
>  104   0     112248      17120     110696          0          0 PNNI Update 01  
>  105   0      17408        820       6828          0          0 TACACS+         
>  107   0        632          0       7460          0          0 NTP             
>                                  18494624 Total
> 
> 
> it has been running like crazy, doing self reload and crashinfos
> 
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