Posts Tagged threads

More than 100% CPU in top in Linux/Mac

If you are power linux/mac user you should have noticed at least once that top shows more than 100% CPU for a process. I also have seen this multiple times but always wondered how it can be. Here is an example of how my top looked when I started my java and was doing some number crunching.

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User Level Threads

User level threads is created for light weight threads. It needs to be controlled, context switched and swapped by the process. To the Operating System it is only one process without any threads. Here is one implementation of it:

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