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10
Helpful
2
Replies
Kaushik Ray
Beginner

High CPU Utlization

Hello I am using the following router and IOS version

sh inv
NAME: "CISCO3925-CHASSIS", DESCR: "CISCO3925-CHASSIS"
PID: CISCO3925-CHASSIS

 

"flash:c3900-universalk9-mz.SPA.154-1.T1.bin"

 

I am seeing high amount of utilization on the router which is as below.

 

11:45:46 AM Monday Aug 17 2015 UTC

 


      999999999999999999999999999999999999999999999999999999999999
      111100000111112222211111111113333311111000000000000000000000
  100
   90 ************************************************************
   80 ************************************************************
   70 ************************************************************
   60 ************************************************************
   50 ************************************************************
   40 ************************************************************
   30 ************************************************************
   20 ************************************************************
   10 ************************************************************
     0....5....1....1....2....2....3....3....4....4....5....5....6
               0    5    0    5    0    5    0    5    0    5    0
               CPU% per second (last 60 seconds)

 


      999999999999999999999999999999999999999999999999999999999999
      742222221222334233232433233232223233223322222221222223213233
  100 *
   90 ############################################################
   80 ############################################################
   70 ############################################################
   60 ############################################################
   50 ############################################################
   40 ############################################################
   30 ############################################################
   20 ############################################################
   10 ############################################################
     0....5....1....1....2....2....3....3....4....4....5....5....6
               0    5    0    5    0    5    0    5    0    5    0
               CPU% per minute (last 60 minutes)
              * = maximum CPU%   # = average CPU%

 

       1
      909999999999999999999999999999999999999999999999999999999999999999999999
      408444444433344444444434344444434434444344344443444444345444344334334444
  100  **                                                     *
   90 ########################################################################
   80 ########################################################################
   70 ########################################################################
   60 ########################################################################
   50 ########################################################################
   40 ########################################################################
   30 ########################################################################
   20 ########################################################################
   10 ########################################################################
     0....5....1....1....2....2....3....3....4....4....5....5....6....6....7..
               0    5    0    5    0    5    0    5    0    5    0    5    0
                   CPU% per hour (last 72 hours)
                  * = maximum CPU%   # = average CPU%

 

The traffic on the device is not much expecially with the type of router it is.

5 minute input rate 483000 bits/sec, 176 packets/sec
  5 minute output rate 146000 bits/sec, 164 packets/sec

 

Seeing lots of Check Heaps. any way to find out what may be causing this and how to get it fixed? or if there is a know bug with this IOS version?

CPU utilization for five seconds: 90%/90%; one minute: 91%; five minutes: 91%
 PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process
   6    15873688      980875      16183  0.00%  0.25%  0.23%   0 Check heaps
 198       41968   281502523          0  0.15%  0.20%  0.21%   0 Ethernet Msec Ti
   2     1298340      448325       2895  0.15%  0.20%  0.20%   0 Load Meter
  90      183260     2250111         81  0.07%  0.07%  0.07%   0 Per-Second Jobs
 126     1947712     4473488        435  0.07%  0.05%  0.07%   0 BPSM stat Proces
 384     3769092      405286       9299  0.15%  0.05%  0.05%   0 Tag Control
 185       65744    32368619          2  0.07%  0.05%  0.05%   0 PPP manager
  13     6906584       37247     185431  0.00%  0.04%  0.05%   0 Licensing Auto U
 303       61696    34848816          1  0.07%  0.03%  0.02%   0 MMA DP TIMER
 377     2609004      233381      11179  0.00%  0.03%  0.05%   0 MFI LFD Stats Pr
 296       61220    34848696          1  0.07%  0.03%  0.02%   0 MMA DB TIMER
 177     1349428     5043005        267  0.07%  0.03%  0.00%   0 IP Input
 132       61572    34848748          1  0.00%  0.03%  0.01%   0 VRRS Main thread
 173       37164    69144059          0  0.07%  0.02%  0.02%   0 IPAM Manager
 109       88788     8944533          9  0.00%  0.02%  0.01%   0 Netclock Backgro
 368       40664    22272880          1  0.00%  0.01%  0.00%   0 PMIPV6 Thread
 400      931876     2565852        363  0.07%  0.01%  0.00%   0 OSPF-1 Router
 417       10176         789      12897  0.00%  0.01%  0.00% 644 Virtual Exec
  89     2349148       87313      26904  0.00%  0.01%  0.00%   0 Per-minute Jobs
 214      152676     2234524         68  0.00%  0.01%  0.00%   0 ADJ background
 408        7640     5162619          1  0.00%  0.01%  0.00%   0 FR Broadcast Out
 117     1937100       47173      41063  0.00%  0.01%  0.00%   0 BGP Scanner
 308       86920    32445212          2  0.00%  0.01%  0.00%   0 PPP Events
 383      169916     2238047         75  0.00%  0.00%  0.00%   0 TDP Hello
  16     2477088     2233829       1108  0.00%  0.00%  0.00%   0 Environmental mo
 376        4344     2233841          1  0.00%  0.00%  0.00%   0 mLDP Process
 263      463648      223574       2073  0.00%  0.00%  0.00%   0 QoS stats proces
 190       10268     8742314          1  0.00%  0.00%  0.00%   0 SSS Feature Time
  33      300704     3627444         82  0.00%  0.00%  0.00%   0 ARP Input
 363        1516     2236819          0  0.00%  0.00%  0.00%   0 fnvRootHubPortSt
 366      138088      137206       1006  0.00%  0.00%  0.00%   0 mdns Timer Proce
 197        6568    13965313          0  0.00%  0.00%  0.00%   0 Ethernet Timer C
 402      204644     1834637        111  0.00%  0.00%  0.00%   0 OSPF-1 Hello
  57      148556      362742        409  0.00%  0.00%  0.00%   0 Net Background
  60       12168     2233826          5  0.00%  0.00%  0.00%   0 TTY Background
  88       19892      449901         44  0.00%  0.00%  0.00%   0 Compute load avg
  37           0           1          0  0.00%  0.00%  0.00%   0 CEF MIB API
  36           0           1          0  0.00%  0.00%  0.00%   0 ATM ASYNC PROC

 

sh run | include cef
ip cef
ipv6 cef

 

ip cef is already enabled.

 

 

 

2 REPLIES 2
Reza Sharifi
Hall of Fame Expert

Hi,

I think, for this you should open a ticket with TAC and send them the outputs as your CPU is running very high.  They probably recommend an upgrade.

HTH

Joseph W. Doherty
Hall of Fame Expert

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Posting

For just (about) 500 Kbps, your CPU just seems a tad abnormally high.

I agree with Reza, this is something you could take to TAC, and also agree with Reza they will probably recommend changing the IOS version.