Command: sar -u ALL
%total
Percentage of time that the CPU or CPUs were used. In fact
this is 100% - %idle. where %idle is percentage of time that
the CPU or CPUs were idle and the system did not have an
outstanding disk I/O request.
%iowait
Percentage of time that the CPU or CPUs were idle during
which the system had an outstanding disk I/O request.