High CPU Load while Executing the 'package-crashfiles' Command

Asset ID:	1-72-2114067.1
Update Date:	2017-05-23
Keywords:

Solution Type Problem Resolution Sure

Solution 2114067.1 : High CPU Load while Executing the 'package-crashfiles' Command

Applies to:

Acme Packet 6300 - Version S-Cz7.2.0 to S-Cz7.4.0 [Release S-Cz7.0]
Acme Packet 6300

Symptoms

CPU hike 99% percent while executing the package crash file command.

Cause

CPU hike when we execute the package crash files command. There were not much traffic during this issue.

SBC-6300-1# show platform cpu-load
Total load: 12%
CPU#00 0%
CPU#01 0%
CPU#02 1%
CPU#03 0%
CPU#04 0%
CPU#05 99%
CPU#06 0%
CPU#07 0%

Cli.audit log

2016-02-17 17:23:11.022 TaskID: 0x00000076, admin@<ip address> : 'cpu-monitor'

2016-02-17 17:23:20.347 TaskID: 0x00000074, admin@<ip address> : 'package-crashfiles'

log.brokerd

Feb 17 17:24:27.700 [CRITICAL] (0) CPU core5 is at 99 percent, over critical threshold of 95 percent

Solution

The show platform cpu-load command displays the two sets of statistics. The first lists the load in percent on each CPU in the system. The second statistic group is the load average for all CPU and IO over time via 5 statistics.
They are:
1. CPU and IO utilization in the last 1 minute
2. CPU and IO utilization in the last 5 minutes
3. CPU and IO utilization in the last 10 minutes
4. Number of currently running processes and the total number of processes
5. Last process ID used

eg: SBC-6300-1# show platform cpu-load
Total load: 12%
CPU#00 0%
CPU#01 0%
CPU#02 1%
CPU#03 0%
CPU#04 0%
CPU#05 99%
CPU#06 0%
CPU#07 0%

Load average: 3.25 1.73 0.76 3/306 6361

There is no specific function for each CPU core. If one core is already at 100% with some task, the next task will use another core .

There are 8 different cpu cores in 6300. One of the cpu cores that is handling this particular task will consume all the cpu cycles that are available for it to process the task. It is normal to see such cpu core spikes when running package command. Note that this cpu spike does not load limit the system and impact traffic.

References

<NOTE:166650.1> - Working Effectively With Oracle Support - Best Practices

Attachments

This solution has no attachment