Alcatel-Lucent 5620 Troubleshooting Manual page 123

Release 12.0 R4 | August 2014 | 3HE 08864 AAAD TQZZA Edition 01
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CPU %usr %nice
all 0.25 0.00
all 0.50 0.00
all 0.17 0.00
all 0.25 0.00
Heading
CPU
%usr
%nice
%sys
%iowait
%irq
%soft
%steal
%guest
%idle
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6 Go to step 9.
7 Perform the following steps to check for processes that are consuming excessive
CPU cycles:
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Alcatel-Lucent 5620 Service Aware Manager
5620 SAM
Troubleshooting Guide
Review the command output. Code
output; Table 10-2 describes each output field.
Code 10-1: RHEL mpstat output example
%sys %iowait %irq
0.17 0.00 0.00
0.08 0.08 0.00
0.08 0.00 0.00
0.17 0.08 0.00
Table 10-2 RHEL mpstat field descriptions
Description (events per second unless noted)
Processor number; the keyword all indicates that statistics are calculated
as averages among all processors
Percentage of CPU utilization at the user application level
Percentage of CPU utilization at the user level with nice priority
Percentage of CPU utilization at the system level; does not include time
spent servicing hardware and software interrupts
Percentage of CPU idle time during which the system had an outstanding
disk I/O request
Percentage of CPU time spent servicing hardware interrupts
Percentage of CPU time spent servicing software interrupts
Percentage of time spent in involuntary wait by the virtual CPU or CPUs
during hypervisor servicing of another virtual processor
Percentage of CPU time spent running a virtual processor
Percentage of CPU idle time without an outstanding disk I/O request
Review the %usr, %sys and %idle statistics, which together indicate the level
of CPU saturation. A Java application fully using the CPUs should fall within
80 to 90 percent of the %usr value, and 20 to 10 percent of the %sys value. A
smaller percentage for the %sys value indicates that more time is being spent
running user code, which generally results in better execution of the Java
application.
Press CTRL-C to stop the command.
To list the top CPU processes using the UNIX utility prstat, type:
# prstat ↵
Depending on your system configuration, approximately the top 20 processes
are displayed.
Review the output.
10 — Troubleshooting the 5620 SAM platform
10-1 is an example of RHEL mpstat
%soft %steal %guest
0.00 0.00 0.00
0.00 0.00 0.00
0.00 0.00 0.00
0.00 0.00 0.00
%idle
99.58
99.33
99.75
99.50
10-7