A context switch occurs when a computer’s CPU switches from one process or thread to a different process or thread. PCB of a process is used to represent the context of a process. Context Switching or Process Switching in OS is one of the simplest topic and concept but when we try to make it more simple some time we forget to mention the most important and intresting things which happens in the Context switching. Here in this section of Operating System Long Questions and Answers,We have listed out some of the important Long Questions with Answers on Process State and State Transition Diagram which will help students to answer it correctly in their University Written Exam. This may be required, depending on how address translation is managed. Context switch time is pure over-head. This context switching is a major feature of a multitasking operating system. Hi, Admin of this blog is an IT lover, Software Engineer by qualification and profession who love to teach the technical concepts of software engineering and programming in simple way. Whenever the process is switched following information is stored: Speed is important but direction is more important. The intervals of context switching are highly depended on the hardware provision. Solve company interview questions and improve your coding intellect Organizational Requirements in Requirements engineering Organizational Requirements in Requirement Engineering Organizational requir... Design and Implementation constraints with example These are also a type of requirments but a little bit confusing to understand some tim... To understand the concept of Software Architecture you should have knowledge and concept of what is Architecture. A context switching is the procedure to restore and store the state of context of CPU in process control block(PCB) so that the process execution can be resumed from the same point at a later time. About Administrator A context switching sometimes referred as a task switch or a process switch. Update the process control block of the process selected. Context switching allows for one CPU to handle numerous processes or threads without the need for additional processors. A context switch is the mechanism to store and restore the state or context of a CPU in Process Control block so that a process execution can be resumed from the same point at a later time. How much and How frequent Context Switching is recommended for OS? Short term – Context switching time – Short term scheduler will decide which process to be executed next and then it will call dispatcher. PCB of a process is used to represent the context of a process. A process which also sometimes referred as a task is running instance of a program. This context switching technique enables multiple processes to share a single CPU. Context Switching, Process Suspension, Process Resumption, And Process Creation CS 503 - PART 4 1 2010. Context switching is shown as: In some hardware systems there employ two or more sets of processors registers to reduce the amount of context switching time. Moveover, on this informative platform, individuals from everywhere could discuss and share their thoughts with others as well. This includes changing the state of this process to Running. The context switching can expressively affect the performance such as modern computers have several general and status registers to be saved. In other words, it is context switching. (n+m) bxK time units is required to switch the context to save the state of the processor with n general registers b is assumed as the store of operations which are required to save n and m registers of two process control block (PCB) and K time unit is required to store each instruction. To provide protection to the hardware, we have privileged instructions which execute only in kernel mode.