Created at: 2024-11-12
mpstat(8): 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.
mpstat -P ALL 1
04:01:38 PM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %gnice %idle
04:01:39 PM all 0.51 0.00 0.25 0.00 0.00 0.00 0.00 0.00 0.00 99.24
04:01:39 PM 0 1.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 99.00
04:01:39 PM 1 1.02 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 98.98
04:01:39 PM 2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
04:01:39 PM 3 1.03 0.00 1.03 0.00 0.00 0.00 0.00 0.00 0.00 97.94
04:01:39 PM 4 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
04:01:39 PM 5 1.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 99.00
04:01:39 PM 6 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
04:01:39 PM 7 0.00 0.00 1.03 0.00 0.00 0.00 0.00 0.00 0.00 98.97
04:01:39 PM CPU %usr %nice %sys %iowait %irq %soft %steal %guest %gnice %idle
04:01:40 PM all 0.00 0.00 0.38 0.00 0.13 0.00 0.00 0.00 0.00 99.49
04:01:40 PM 0 0.00 0.00 1.01 0.00 0.00 0.00 0.00 0.00 0.00 98.99
04:01:40 PM 1 0.00 0.00 0.98 0.00 0.98 0.00 0.00 0.00 0.00 98.04
04:01:40 PM 2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
04:01:40 PM 3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
04:01:40 PM 4 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
04:01:40 PM 5 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
04:01:40 PM 6 0.00 0.00 1.00 0.00 0.00 0.00 0.00 0.00 0.00 99.00
04:01:40 PM 7 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 100.00
[...]
The -P flag is used to print the per-CPU report.
The most important coluns are usr, sys, and idle. If usr+sys are 100% on just one CPU, it can due to a single-threaded intense process running.
%usr: User-time, excluding %nice.%nice: User-time for processes with nice'd priority.%sys: System-time (kernel).%iowait: I/O wait.%irq: Hardware interrupt CPU usage.%soft: Software interrupt CPU usage.%steal: Time spent servicing other tenants.%guest: CPU Time spent in guest virtual machines.%gnice: Same as nice but for guest machines.%idle: Idle