2c. CPU States
The CPU states are shown in the Summary Area. They are always
shown as a percentage and are for the time between now and the
last refresh.

us -- User CPU time
The time the CPU has spent running users' processes that are
not niced.

sy -- System CPU time
The time the CPU has spent running the kernel and its pro-
cesses.

ni -- Nice CPU time
The time the CPU has spent running users' proccess that have
been niced.

wa -- iowait
Amount of time the CPU has been waiting for I/O to complete.

hi -- Hardware IRQ
The amount of time the CPU has been servicing hardware inter-
rupts.

si -- Software Interrupts
The amount of time the CPU has been servicing software inter-
rupts.

st -- Steal Time
The amount of CPU 'stolen' from this virtual machine by the
hypervisor for other tasks (such as running another virtual
machine).