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Kernel

September 18, 2016
Published By : Pratik Kataria
Categorised in: Operating System Design

Introduction

• A kernel is a central component of an operating system.
• It acts as an interface between the user applications and the hardware.
• The aim of the kernel is to manage the communication between the software (user level applications) and the hardware (CPU, disk memory etc)
• Part of UNIX OS that contains code for
  • Controlling execution of process
  • Scheduling process fairly
  • Allocating main memory
  • Allocating secondary memory
  • Handling peripherals

Characteristics of kernel

• Loading and existence into main memory
• Mostly written in C and assembly language
• Use programs accesses kernel services via system call interface
• Provides its services transparently

Terminology

• Kernel mode or kernel space
• User mode or user space

Operating system architectures

• OS tends to be complex because
  • Provides many services
  • Support variety of hardware and software
• Monolithic

• Layered
• Micro

• Exo

Pratik Kataria

Pratik Kataria is currently learning Springboot and Hibernate.
Technologies known and worked on: C/C++, Java, Python, JavaScript, HTML, CSS, WordPress, Angular, Ionic, MongoDB, SQL and Android.
Softwares known and worked on: Adobe Photoshop, Adobe Illustrator and Adobe After Effects.

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