Linux Tutorials: mpstat commands examples

 mpstat - Report processors related statistics.

The mpstat command writes to standard output activities for each available processor, processor 0 being the first one.  Global average activities among all processors are also reported. 

How to install mpstat?

$ sudo apt install sysstat         [On Debian, Ubuntu and Mint]
$ sudo yum install sysstat         [On RHEL/CentOS/Fedora and Rocky Linux/AlmaLinux]
$ sudo emerge -a app-admin/sysstat [On Gentoo Linux]
$ sudo pacman -S sysstat           [On Arch Linux]
$ sudo zypper install sysstat      [On OpenSUSE] 

mpstat command output

Understanding mpstat output

• CPU : Processor number. The keyword all statistics are calculated as averages among all processors.
• % usr : Show the percentage of CPU utilization that occurred while executing at the user level (application).
• % nice : Show the percentage of CPU utilization that occurred while executing at the user level with nice priority.
• % sys : Show the percentage of CPU utilization that occurred while executing at the system level (kernel). Note that this does not include time-consuming servicing hardware and software interrupts.
• % iowait : The CPU or CPUs were idle during which the system had an outstanding disk I / O request.
• % irq : Show the percentage of time spent by the CPU or CPUs to service hardware interrupts.
• % soft : Show the percentage of time spent by the CPU or CPUs to service software interrupts.
• % steal : Show the percentage of time spent waiting for the CPU or CPUs while the hypervisor is servicing another virtual processor.
• % guest : Show the percentage of time used by the CPU or CPUs to run a virtual processor.
• % idle : The CPU or CPUs were idle and the system did not have an outstanding disk I / O request.

mstat commands example

1. To report the processor stats:

# mpstat 2 10 

2. To report all processor stats:

# mpstat -A 2 10 

3. To get the processor number for which the stats are displaying:

# mpstat -P 2 10 

4. To report the CPU utilization stats:

# mpstat -u 2 10 

5. To get the version info:

# mpstat -V 

To see the default set of utilization metrics, enter the following command:
mpstat 1 1

To see the default set of utilization metrics in wide display mode, enter the following command:
mpstat –w 1 1

To see the detailed dispatch & affinity metrics, enter the following command:
 mpstat –d 1 1

To see the detailed interrupts report, enter the following command:
mpstat –i 1 1

To see all the statistics, enter the following command:
mpstat –a 1 1

To see simultaneous multithreading utilization, enter the following command:
mpstat –s 1 1

To see all the processor metrics of a WPAR, enter the following command:
mpstat -@ wparname

Note: To see all the processor metrics of a WPAR inside the WPAR, enter the following command:
mpstat -@

To see the sorted output for the column cs, enter the following command:
mpstat -d -O sortcolumn=cs

To see the list of the top 10 CPUs, enter the following command:
mpstat -a -O sortcolumn=min,sortorder=desc,topcount=10

To see metrics based on the virtual processor, enter the following command:
mpstat –v

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