PPT Slide

A two-state process model

Enter

Dispatch

Exit

Pause

Not

running

Running

• Process creation
  • new batch job
  • interactive login
  • OS created to provide a service
  • spawned by existing process

• Process termination
  • normal completion
  • abnormal end (abend)
    • time related
    • protection error
    • program error
    • data error
    • I/O failure
    • memory error

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