COMP 242 Class Notes

Handout 2: Process Management

• Scheduling and Context Switching
  • Xinu Scheduling Policy
  • Process Table
  • Process State
  • Xinu Mechanism for Context Switching and Scheduling
    • Ready List
    • ctxsw
    • The Null Process
• Process Resumption and Suspension
  • Semantics
  • Implementation
    • Procedure resume
    • Procedure suspend
• Process Termination
  • Implementation
    • Tasks Performed
• Process Creation
  • Implementation
    • Arguments
  • Tasks Done
• System Calls
  • Getpid
  • Getprio (pid)
  • Chprio (pid, newprio)
• Need for Multiprocessing
  • Time Sharing
  • Different Applications per User
  • Several Processes per Application
  • Concurrent Computing
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