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I need to analyze the CPU usage of a single process under AIX. Currently, I'm using nmon but it gets the overall CPU and IO usage. Also, I know about topas, but it will get the overall usage of the "hot" processes instead of a specific process.

Do such a tool exists, or should I just write my own script using ps | grep?

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nmon will show you the CPU usage of individual processes via the 't' display (which, amongst other things, shows top CPU usage by process). I'm guessing if you're interested in knowing how much CPU it's using, it'll be using a fair amount?

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