Switching the CPU to another process requires performing a state save of the current process and a state restore of a different process. This task is known as a context switch. When a context switch occurs, the kernel saves the context of the old process in its PCB and loads the saved context of the new process scheduled to run. Context-switch time is pure overhead, because the system does no useful work while switching
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pdfs
- owner: miller - (no access) - Abraham Silberschatz_ Peter B Galvin_ Greg Gagne -Operating system concepts-Wiley (2012).pdf, p138
- owner: hughleat - (no access) - Abraham-Silberschatz-Operating-System-Concepts---9th2012.12.pdf, p138
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