Comparison between vxworks and Linux Kernel

	VxWorks	Linux
Kernel Structure	The microkernel only provides basic services, such as task management, memory management, and interrupt processing.	In addition to basic services, the macro kernel also includes file systems and network protocols.
Running Mode	The application runs in the "real mode". There is no distinction between the user mode and the kernel mode.	The "protection mode" is adopted. User processes and threads run in user mode, and kernel threads run in kernel mode.
Memory Access and memory Protection	The kernel uses the real storage management mode. All tasks run in the same physical address space. The user program operates the physical address directly, and the memory protection cannot be provided directly, and error propagation cannot be prevented.	The kernel adopts the virtual storage management mode. The user has an independent address space, and the user process can only access the virtual space of the process. The memory protection is provided to prevent the spread of errors.
Execution Unit	Task	Processes and threads
Request kernel service method	Function call, faster	More secure system calls
Real-time	Hard Real-Time	Soft Real-Time