Support mpstat to print per CPU utilization

[joyxiong]

The current SAR command prints the system's average CPU utilization. mpstat breaks down CPU utilization per CPU. With this data, we can find out if a particular CPU is more heavily used than others. A sample output is here:

mpstat -P ALL 2 11:30:49 AM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %idle 11:30:51 AM all 6.88 0.00 1.79 0.71 0.00 0.00 0.00 0.00 90.61 11:30:51 AM 0 8.04 0.00 3.52 0.00 0.00 0.00 0.00 0.00 88.44 11:30:51 AM 1 2.48 0.00 1.49 0.00 0.00 0.00 0.00 0.00 96.04 11:30:51 AM 2 0.50 0.00 0.50 0.00 0.00 0.00 0.00 0.00 99.00 11:30:51 AM 3 0.50 0.00 0.50 6.53 0.00 0.00 0.00 0.00 92.46 11:30:51 AM 4 0.50 0.00 0.50 0.00 0.00 0.00 0.00 0.00 99.00 11:30:51 AM 5 0.50 0.00 0.00 0.00 0.00 0.00 0.00 0.00 99.50 11:30:51 AM 6 7.00 0.00 2.50 0.00 0.00 0.00 0.00 0.00 90.50 11:30:51 AM 7 58.00 0.00 4.50 0.00 0.00 0.00 0.00 0.00 37.50 11:30:51 AM 8 3.02 0.00 5.03 0.00 0.00 0.00 0.00 0.00 91.96 11:30:51 AM 9 0.50 0.00 2.00 2.00 0.00 0.00 0.00 0.00 95.50 11:30:51 AM 10 1.00 0.00 0.50 0.00 0.00 0.00 0.00 0.00 98.51 11:30:51 AM 11 0.00 0.00 1.00 0.00 0.00 0.00 0.00 0.00 99.00

[RiteshMaheshwari]

Joy, can you look into sar a little more and find out if using some other options in sar can give per-CPU usage?

[joyxiong]

Ritesh, The command sar -u -P ALL 2 can print the per CPU utilization with 2-fewer breakdown columns, %irq and %soft per CPU. A sample output from sar is as below: 12:46:46 PM CPU %user %nice %system %iowait %steal %idle 12:46:48 PM all 6.97 0.00 1.67 0.83 0.00 90.53 12:46:48 PM 0 11.50 0.00 3.50 0.00 0.00 85.00 12:46:48 PM 1 3.02 0.00 1.51 7.54 0.00 87.94 12:46:48 PM 2 2.50 0.00 0.50 0.00 0.00 97.00 12:46:48 PM 3 0.50 0.00 0.50 0.00 0.00 99.00 12:46:48 PM 4 0.50 0.00 0.50 0.00 0.00 99.00 12:46:48 PM 5 0.50 0.00 0.50 0.00 0.00 98.99 12:46:48 PM 6 4.50 0.00 2.00 0.00 0.00 93.50 12:46:48 PM 7 57.21 0.00 5.47 2.49 0.00 34.83 12:46:48 PM 8 3.00 0.00 4.00 0.00 0.00 93.00 12:46:48 PM 9 0.50 0.00 1.00 0.00 0.00 98.50 12:46:48 PM 10 0.50 0.00 1.00 0.00 0.00 98.50 12:46:48 PM 11 0.00 0.00 0.50 0.00 0.00 99.50

[richardhsu]

We can do sar -u ALL -P ALL will actually give us all the columns. Just update we have sar -u -P ALL now to get per cpuusage.