Two Techniques For Multithreading

• Blocked Multithreading [Alewife], like time sharing ... continue to execute until thread is blocked, then switch

  • Has lower hardware impact
  • Good single thread performance

• Interleaved Multithreading [Tera], switch execution of threads on each cycle

  • Lower logical switching penalty
  • Greater impact on hardware design

Keeping multiple contexts is essential

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