High CPU process " LOAD METER "

[mmendis]

Hi All,

I have Cisco 2851 router , having a problem with high cpu usage without having much of a traffic. Could some one help ??

show proc cpu sorted
CPU utilization for five seconds: 98%/95%; one minute: 98%; five minutes: 97%
 PID Runtime(ms)     Invoked      uSecs   5Sec   1Min   5Min TTY Process
   2     5407556     1913720       2825  2.79%  1.54%  1.21%   0 Load Meter       
 254     3011988     1177236       2558  0.63%  0.23%  0.05%   0 NIST rng proc    
 140    41117760    51656672        795  0.63%  0.86%  0.76%   0 IP Input         
 114    12794788  1203103573         10  0.47%  0.49%  0.53%   0 Ethernet Msec Ti
  30    41812148    58190919        718  0.23%  0.24%  0.26%   0 ARP Input        
 375       40332         941      42860  0.15%  0.38%  0.23% 515 Virtual Exec     
  66     9648852     9570238       1008  0.15%  0.13%  0.13%   0 Per-Second Jobs  
 127      451920     1457546        310  0.07%  0.00%  0.00%   0 CDP Protocol     
 373      613484     9595699         63  0.07%  0.02%  0.00%   0 NTP              
 287     2452028   298701343          8  0.07%  0.09%  0.09%   0 MMON MENG        
 175     2060532    13467934        152  0.07%  0.11%  0.08%   0 CEF: IPv4 proces
  17      136740     9338203         14  0.07%  0.00%  0.00%   0 IPC Periodic Tim
 225      231152    18668237         12  0.07%  0.00%  0.00%   0 Inspect process  
 113      685012    57554715         11  0.07%  0.02%  0.02%   0 Ethernet Timer C
 217      112900     9560008         11  0.07%  0.00%  0.00%   0 PfR BR Learn     
 136     3466068   296860369         11  0.07%  0.08%  0.09%   0 IPAM Manager    

Cisco IOS Software, 2800 Software (C2800NM-ADVENTERPRISEK9-M), Version 15.1(4)M6, RELEASE SOFTWARE (fc2)

[Joseph W. Doherty]

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Posting

Hmm, appears to be mostly interrupt CPU.  How much traffic isn't much?

Any thing "special" about the configuration?

[mmendis]

Thanks Joseph,

Traffic is around 40 -60M . "special config. " I have created 8 traffic shapes on the inside and out side interfaces

[Joseph W. Doherty]

Disclaimer

The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

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Posting

Is that aggregate, or in each direction?

[mmendis]

It is aggregated traffic ..........

[Joseph W. Doherty]

Disclaimer

The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

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In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.

Posting

If aggregate, then your CPU utilization seems high although can't say what the CPU impact is for 8 shapers.

[mmendis]

Dear Joseph,

Thanks for the reply. I found out that Actually high cpu caused due to traffic usage occurred time to time. Problem was it's not captured on show interface summary ( even with load interval 30 ) 

[Joseph W. Doherty]

Disclaimer

The Author of this posting offers the information contained within this posting without consideration and with the reader's understanding that there's no implied or expressed suitability or fitness for any purpose. Information provided is for informational purposes only and should not be construed as rendering professional advice of any kind. Usage of this posting's information is solely at reader's own risk.

Liability Disclaimer

In no event shall Author be liable for any damages whatsoever (including, without limitation, damages for loss of use, data or profit) arising out of the use or inability to use the posting's information even if Author has been advised of the possibility of such damage.

Posting

Ah, well that what normally drives high interrupt CPU, i.e. traffic forwarding, in your case, probably microbursts.  Your shapers probably contribute to a higher CPU for that traffic than just the traffic forwarding needs.

Thanks for letting us know.