Troubleshooting Flowchart; Solution - HP FlexFabric 12900 series Troubleshooting Manual

Troubleshooting flowchart

Figure 8 Troubleshooting high CPU utilization
High CPU utilization
Identify the job that has a
high CPU utilization
Display the job's stack
Save diagnostic information
Contact the support

Solution

To resolve the problem:
1. Identify the job that has a high CPU utilization. For example:
[HP-probe] display process cpu slot 1
CPU utilization in 5 secs: 2.4%; 1 min: 2.5%; 5 mins: 2.4%
JID
10
11
The output shows the average CPU usage values of jobs for the last 5 seconds, 1 minute, and 5
minutes. Typically, the average CPU usage of a job is less than 5%.
2. Display the job's stack. In this example, the job uses the ID of 145.
[HP-probe] follow job 145 slot 1
Attaching to process 145 ([mIPC])
Iteration 1 of 5
------------------------------
Kernel stack:
[<ffffffff8045e858>] schedule+0x738/0x1050
5Sec 1Min
1 0.0% 0.0%
2 0.0% 0.0%
3 0.0% 0.0%
4 0.0% 0.0%
5 0.0% 0.0%
6 0.0% 0.0%
7 0.0% 0.0%
8 0.0% 0.0%
9 0.0% 0.0%
0.0% 0.0%
0.0% 0.0%
5Min Name
0.0% scmd
0.0% [kthreadd]
0.0% [migration/0]
0.0% [ksoftirqd/0]
0.0% [watchdog/0]
0.0% [migration/1]
0.0% [ksoftirqd/1]
0.0% [watchdog/1]
0.0% [migration/2]
0.0% [ksoftirqd/2]
0.0% [watchdog/2]
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