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1 definition found
 for context switch
From The Free On-line Dictionary of Computing (30 December 2018) :

  context switch
  
      When a multitasking operating system
     stops running one process and starts running another.  Many
     operating systems implement concurrency by maintaining
     separate environments or "contexts" for each process.  The
     amount of separation between processes, and the amount of
     information in a context, depends on the operating system but
     generally the OS should prevent processes interfering with each
     other, e.g. by modifying each other's memory.
  
     A context switch can be as simple as changing the value of the
     program counter and stack pointer or it might involve
     resetting the MMU to make a different set of memory pages
     available.
  
     In order to present the user with an impression of parallism,
     and to allow processes to respond quickly to external events,
     many systems will context switch tens or hundreds of times per
     second.
  
     (1996-12-18)
  

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