=== Tony's Minutes ===

  * Concrete metrics for congestion detection
    * count deflections at each node
    * node cannot inject: starvation
      * 4 inputs: no more than 3 = fine, below saturation
      * whenever router detects >3, sends signal
      * know sources at router
        * simple solution: send message to every source (maybe only if it needs to inject)
        * only routers that need to inject complain
    * possibly detect how many nodes are sending back reduction messages to determine how much to reduce injection
    * back channel that signals router ID to reduce injection
      * determine ID: 
        - look at any/all flit(s)  
        - determine rates coming from different sources
      * evaluate both to see if any benefit to added overhead needed for logic in b)
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  * looking for simple basline algorithm
  * can we prove something about system/algorithms based on evaluations?  (prevents starvation in some timeline, etc)
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  * without congestion control, no way to provide latency guarantees
    * therefore latency guarantees are a product of good/fair injection control
    * add MTTS counters to help prioritize/help latency guarantee\\
  * Feedback mechanism
      * simple case is backchannel
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  * Processor Simulator Requirements
    * application traces
    * local cache
    * inst window
    * Operation:
      - read from trace file: mem vs non-mem
      - local vs nonlocal cache
      - insert into network
      - receive request back
    * model interconnection network as a distributed cache
    * assume everything hits within cache - a miss goes out to mem controller, not part of interconn network
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