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Context Switch

Explain Context Switch?

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Switching the CPU into another process needs saving the state of the old process & loading the saved state for the new process. This task is said as a context switch. Context-switch time is pure overhead, since the system does no useful work whereas switching. Its speed varies from machine to machine, based on the memory speed, the number of registers which have to be copied, the existed of special instructions (such like a single instruction to load or store all registers).

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