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top command: abbrevations and meanings - Please !

 
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Top Forums UNIX for Dummies Questions & Answers top command: abbrevations and meanings - Please !
# 1  
Old 11-25-2010
Bug top command: abbrevations and meanings - Please !
Hi all,

I was trying see some CPU utilization of a Red hat Linux machine using 'top' command.
Any way I got high level idea from the out puts,
but when I observed the following line:

Cpu(s): 7.4%us, 0.5%sy, 0.0%ni, 91.6%id, 0.4%wa, 0.0%hi, 0.1%si, 0.0%st

I couldn't make out what all these abbrevations mean (I guess us: used, id: idle ....)
It seems that all these are CPU usage components, I went through the man page but couldn't find any description.

Any one please give idea about these abbrevations, thanks in advance Smilie

-a99u
# 2  
Old 11-25-2010
An excerption of:

Man Page for top (Linux Section 1) - The UNIX and Linux Forums

Quote:
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).
# 3  
Old 11-25-2010
Thanks alot for showing patience to answer this question Smilie
 
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