What is %id in Process Monitor

[gookaa]

Hi. A line in my process monitor like that:

Cpu(s): 17.5%us, 10.8%sy, 0.0%ni, 58.5%id, 13.0%wa, 0.1%hi, 0.1%si, 0.0%st

I wonder what us, sy, ni, id (especially this one), wa, hi, si and st mean?

Can you please make me understand? Also can you offer to read any article to reduce "id" and "us" to me? Thanks.

 

[scsi]

us = user
sy = system
ni = nice
id = idle
wa = wait

Not sure what the other 2 are.

 

[scsi]

Never mind here is what mpstat says:

04:34:48 PM CPU %user %nice %sys %iowait %irq %soft %steal %idle intr/s
04:34:48 PM all 2.81 0.31 1.98 2.40 0.03 0.08 0.00 92.39 996.31

http://www.cyberciti.biz/tips/how-do-i-find-out-linux-cpu-utilization.html

 

[gookaa]

is idle mean free?

 

[scsi]

Yes idle means that % of the cpu isnt being used at the moment.