Sungju's Slow Life

Personal journal

Unix Top command

If you are unix guys, you know well about ‘top’ command which display very useful information about the system usage. I also used this a lot during check the system states. But, in recent, one of my customer asked me about the difference between ‘CPU states:’ field and each process’s cpu usage. He asked why it is not matched.

I tried to figure it out by check the source code, but it’s still not clear. So, I googled about ‘top’ command. Because of too simple word ‘top’, it was not easy to find the correct documentation. I struggled a few days. 😛


But, finally I found the original site, ‘‘.
They explained about this with very simple but clear way. If you have any interest about this field, you can check this web site’s ‘Documentation’ section.

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