However, in Monolithic kernel user services and kernel services both are kept in the same address space. A Monolithic kernel is an OS architecture where the entire operating system is working in kernel space. But unlike micro kernel, the user services and kernel services are implemented under same address space. This increases the size of the kernel further increases the size of operating system.
Monolithic kernels are able to dynamically load executable modules at run-time. It manages the system resources between application and hardware of the system. The monolithic kernel provides CPU scheduling, memory management, file management, and other operating system functions through system calls.
As user services and kernel services both reside in same address space, this results in the fast executing operating system. One of the drawbacks of the monolithic kernel is if anyone service fails entire system is crashed. If a new service is to be added in a monolithic kernel, the entire operating system is to be modified.
Whereas in a Micro kernel architecture, the core functionality is isolated from system services and device drivers. Micro kernel being a kernel manages all system resources. But in a micro kernel, the user services and the kernel services are implemented in different address space. The user services are kept in user address space, and kernel services are kept under kernel address space.
This reduces the size of the kernel and further reduces the size of the operating system. In addition to the communication between application and hardware of the system, the micro kernel provides minimal services of process and memory management. The communication between the client application and services running in user address space is established through message passing. They never interact directly. Change Language. Related Articles. Table of Contents. Save Article. Improve Article.
Like Article. Last Updated : 22 Jun, Next Challenges in Internet of things IoT. Recommended Articles. Article Contributed By :. Basis for Comparison Microkernel Monolithic Kernel Basic In microkernel user services and kernel, services are kept in separate address space.
In monolithic kernel, both user services and kernel services are kept in the same address space. Size Microkernel are smaller in size. Monolithic kernel is larger than microkernel. Execution Slow execution. Fast execution. Extendible The microkernel is easily extendible. The monolithic kernel is hard to extend. Security If a service crashes, it does effect on working of microkernel.
If a service crashes, the whole system crashes in monolithic kernel. Code To write a microkernel, more code is required. To write a monolithic kernel, less code is required. Microkernel being a kernel manages all system resources. But in a microkernel, the user services and the kernel services are implemented in different address space.
The user services are kept in user address space , and kernel services are kept under kernel address space. This reduces the size of the kernel and further reduces the size of operating system. In addition to the communication between application and hardware of the system, the microkernel provides minimal services of process and memory management.
They never interact directly. This reduces the speed of execution of microkernel.
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