Coherence Ordering For Ring- Based Chip Multiprocessors
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Coherence Ordering For Ring- Based Chip Multiprocessors

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Understanding coherence for future CMPs.

Understanding coherence for future CMPs.

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Coherence Ordering For Ring- Based Chip Multiprocessors Coherence Ordering For Ring- Based Chip Multiprocessors Presentation Transcript

  • Department of Electrical Engineering and Computer Science Coherence Ordering For Ring- Based Chip Multiprocessors Michael R. Marty and Mark D. Hill University of Wisconsin—Madison [LINK]
  • Department of Electrical Engineering and Computer Science Overview • Rings a viable interconnect for future CMPs. • Cache Coherence in rings: • Ordering Point • Greedy Order • Ring-Order: • Improves performance relative to ordering point by activating requests immediately. • Improves performance stability relative to greedy order by not using retries.
  • Department of Electrical Engineering and Computer Science ORDERING-POINT
  • Department of Electrical Engineering and Computer Science GREEDY-ORDER
  • Department of Electrical Engineering and Computer Science RING-ORDER
  • Department of Electrical Engineering and Computer Science THIS IS HOW CMP WITH RING LOOKS!
  • Department of Electrical Engineering and Computer Science EVALUATION SYSTEM
  • Department of Electrical Engineering and Computer Science RESULT: RUNTIME
  • Department of Electrical Engineering and Computer Science RESULT: L2 MISSES & RING TRAFFIC
  • Department of Electrical Engineering and Computer Science RESULT: MISS LATENCIES & REQUEST
  • Department of Electrical Engineering and Computer Science STATE TRANSITION
  • Department of Electrical Engineering and Computer Science Questions?
  • Department of Electrical Engineering and Computer Science Thank You http://chetanpatil.info/talks.html