HP Blade Switch 6120XG CPU utilization (155 Views)
Reply
Occasional Visitor
fana
Posts: 1
Registered: ‎04-25-2014
Message 1 of 1 (155 Views)

HP Blade Switch 6120XG CPU utilization

[ Edited ]

Hello,

 

Hello,

We have two 10Gb HP Blade Switch 6120XG and two 1Gb 6120G/XG switches in a c3000 chassis. Every 41 hours each switch will experience a higher than usual CPU utilization (40-50%).
"show cpu" will display:

 

Task usage for last 8 sec
% CPU | Description
-------+--------------------------
64.1 | Idle
0.4 | Sessions & I/O
4.1 | System Services
0.2 | SNMP
31.2 | IP Host/Routing


Advanced diagnostics ("edomtset", then "taskUsageShow") show following:

| Recent | % | Total | Time Since | Times | Max
Task Name | Time | CPU | Time | Last Ran | Ran | Time
----------------+---------+-----+---------+------------|----------|-------
InetServer | 18 ms | 1 | 279 ms| 113 us | 2201 | 682 us
mPpmgrCtrl | 20 ms | 1 | 364 ms| 216 ms | 85 | 9 ms
eDevIdle | 272 ms | 24 | 4 s | 480 us | 124842 | 270 us
tDevPollRx | 392 ms | 34 | 5 s | 390 us | 62217 | 287 us
tDevPollTx | 361 ms | 32 | 5 s | 541 us | 62205 | 288 us
bcmCNTR_0 | 46 ms | 4 | 643 ms| 200 ms | 1000 | 816 us


"ghs lt" command shows increased usage in:


Memory: Used/Size or
Task Id Status Pri Stack:HiWater/Size Time Task Name
------------ ---------------- --- --------------------- ------- ---------
0x1cff7000 pending 200 0x00000a10/0x00003000 32.50% InetServer
0x1ceb2000 pending 226 0x00000380/0x00002800 20.00% tDevPollRx
0x1ceb1000 pending 226 0x00000438/0x00002800 30.00% tDevPollTx

 

We are sure that network traffic is not the issue, because regardless of spike occurring or not, network traffic on switches is the same. Plus re-sitting OA card was the only action that affected spikes occurrence. Nothing else affected timings of the spikes (every 41 hours) in the past and following was done:

firmware update, replace a switch, restart a switch.

 

What could be the cause of the increased CPU utilization? What are those tasks with high CPU usage responsible for?

 

Thank you!

 

PS. Attached a nicer outputs of the task commands.

 

 

P.S. This thread has been moved from ProCurve / ProVision-Based to HP BladeSystem Network Blades. -HP Forum Moderator

Please use plain text.
The opinions expressed above are the personal opinions of the authors, not of HP. By using this site, you accept the Terms of Use and Rules of Participation