Linux top command output (meaning of %id in cpu states)
Hello.
I have not been able to find the meaning of the %id column of the CPU states section of the Linux top command. It is in the summary area.
Man page for 'top' mention all other columns but this.
I have read in the web that some people 'guess' it means IDLE, but I'm not sure.
Could you please clarify this for me?
Thank you in advance.
cadlg
Software/Hardware used:
Software/Hardware used:
ASKED:
July 3, 2008 2:54 PM
UPDATED:
April 18, 2013 2:27 PM
Answer Wiki:
%id <b>is</b> percent idle. For instance:
<pre>
Cpu(s): 1.0%us, 0.7%sy, 0.0%ni, 97.3%id, 0.0%wa, 0.0%hi, 1.0%si, 0.0%st
</pre>
That shows the CPU 97.3% idle.
Here's the meaning of each of these (or so I understand... the man page doesn't specifically mention it, so I did a web scouring):
1. us -> User CPU time: The time the CPU has spent running users’ processes that are not niced.
2. sy -> System CPU time: The time the CPU has spent running the kernel and its processes.
3. ni -> Nice CPU time: The time the CPU has spent running users’ proccess that have been niced.
4. wa -> iowait: Amount of time the CPU has been waiting for I/O to complete.
5. hi -> Hardware IRQ: The amount of time the CPU has been servicing hardware interrupts.
6. si -> Software Interrupts.: The amount of time the CPU has been servicing software interrupts.
source: http://www.idealwebtools.com/blog/top/
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Carlos, %id is just what you found on the web, idle. A small experiment with
cat some.big.input.file > an.output.file
will clarify the question.
Hehe, yes. It seems pretty obvious now.
Thank you, Petko.
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