Are the CPU cycles used up in doing a context switch accounted for in the process context?

If a process causes a lot of context switches, will the CPU cycles used in the context switch be shown in the process CPU utilization?

In other words, if I run a process that essentially repeatedly executes a system call, then should the output of top show an increase in CPU utilization for 开发者_如何学编程the process because of the increase in context switching from user to kernel space and vice versa?

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Yes, I think it should.

Look at the man pages for top and time in linux and possibly other *nix systems.