User CPU time vs System CPU time?

Question

Could you explain more about \"user CPU time\" and \"system CPU time\"? I have read a lot, but I couldn\'t understand it well.

Answer 1

Based on wikipedia:

• User time is the amount of time the CPU was busy executing code in user space.
• System time is the amount of time the CPU was busy executing code in kernel space. If this value is reported for a thread or process, then it represents the amount of time the kernel was doing work on behalf of the executing context, for example, after a thread issued a system call.