I need this information to optimize the number of worker threads my custom application is allocating.

For example, if I just use top on a single-threaded application on a two-core machine, the 100% CPU usage does not tell me if there is still unused capacity in the form of the other core!

What kind of monitoring tools can I use to detect the difference?


Use htop. It has many more features than top, including showing individual threads and individual CPU usage etc.



When running top, press 1, this will show per-core usage. Maybe it's what you need?

  • +1 It's definitely helpful - I can see total cpu1 and cpu2 usage - lemme try it out some more... – kfmfe04 Dec 22 '11 at 1:28

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