context switch
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.
http://siber.cankaya.edu.tr/ozdogan/OperatingSystems/ceng328/node91.html
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