There is an option to break the CPU usage graph into two sections : kernel mode time and user mode time.
42.
Finally, although twoOStwo virtual machines run in user mode, twoOStwo itself requires installing various device drivers in the host operating system.
43.
By contrast, exec function calls are made with the library jump table, and the kernel code normally executes in user mode.
44.
Although VMware virtual machines run in user mode, VMware Workstation itself requires the installation of various Interrupt Descriptor Table ( IDT ).
45.
User mode programs can issue non-privileged SVCs, but few programs do so directly and instead call system subroutines to obtain system services.
46.
Such a system can run software that " believes " it is running in supervisor mode, but is actually running in user mode.
47.
Recovery Console and recovery discs are different from single user modes in other operating systems because they are independent of the maintained operating system.
48.
The kernel mode stops user mode services and applications from accessing critical areas of the operating system that they should not have access to.
49.
The red area is the amount of time spent in kernel mode, and the green area shows the amount of time spent in user mode.
50.
When the function completes, it switches the processor to user mode and then returns control to the user process; thus simulating a normal procedure return.
