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This test monitors the usage of processors by the Oracle VirtualBox, and thus reveals whether/not the host is consuming CPU resources optimally. With the help of this test, you can quickly detect any abnormal increase in CPU consumption by the VirtualBox host, determine the root-cause for the surge (is it owing to resource-intensive kernel processes? user processes?), and take rapid remedial measures, so that the problem can be contained before it affects the performance of the desktops operating on that VirtualBox.

Measurement	Description	Measurement Unit	Interpretation
Num_proc	Indicates the total number of processors assigned to the Oracle VirtualBox.	Number
Online_proc	Indicates the number of processors currently utilized by the VirtualBox.	Number
Cpu_util	Indicates the percentage of processor time spent on kernel-level and user processes.	Percent	Ideally, the value of this measure should be low. A high value is indicative of excessive CPU consumption by the VirtualBox. Under such circumstances, you can use the values reported by the User_cpu_avg and the Sys_cpu_avg measures to determine where the processor time was spent the most - on executing kernel-level processes or user-level processes?
User_cpu_avg	Indicates the percentage of processor time spent on user processes.	Percent	If the CPU usage of the VirtualBox is very high, then the value of this measure will enable you to figure out whether CPU-intensive user processes are contributing to the CPU drain.
Sys_cpu_avg	Indicates the percentage of processor time spent on kernel-level processing.	Percent	If the CPU usage of the VirtualBox is very high, then the value of this measure will enable you to figure out whether CPU-intensive system processes are contributing to the CPU drain.
Idle_cpu_avg	Indicates the percentage of processor time spent idling.	Percent	A high value for this measure indicates that the processors have been idle for too long a time.