Reporting Snoop Results

• The snoopers must come to some “decision” about bus transactions so memory can know if it’s supposed to deliver data ... when and how?

• Fixed delay counted in clock cycles

  • Snoopers check their tag set -- could be locked because processor is updating
  • Add ability to extend
  • Fixed delay may not be conservative but it works
  • Pentium Pro, HP and Sun processor use this

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