Xcode Instruments CPU time

if i run an application with the per开发者_StackOverflowformance test, the "cpu monitor" show me some informations like process ID/Name or CPU Time. But in which unit of time does it measure ?

An example: if i get 05.04 , what does mean for me

Best Regards

---

Plagiarized from http://en.wikipedia.org/wiki/CPU_time -

CPU time (or CPU usage, process time) is the amount of time for which a central processing unit (CPU) was used for processing instructions of a computer program, as opposed to, for example, waiting for input/output (I/O) operations. The CPU time is often measured in clock ticks or seconds. CPU time is also mentioned as percentage of the CPU's capacity at any given time on multi-tasking environment. That helps in figuring out how a CPU’s computational power is being shared among multiple computer programs.