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Real time emulation of coherence directories using global sparse directories

  • US 6,965,972 B2
  • Filed: 09/25/2002
  • Issued: 11/15/2005
  • Est. Priority Date: 09/25/2002
  • Status: Expired due to Fees
First Claim
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1. An emulation system comprising:

  • a plurality of field programmable gate arrays adapted to emulate nodes of a multi-node shared memory system;

    a plurality of cache directories, each connected to one of said arrays; and

    a plurality of global coherence directories each connected to one of said arrays, wherein each of said global coherence directories maintains information on all memory lines in all of said cache directories;

    wherein by said global coherence directories maintaining information on all memory lines remotely cached by each of said cache directories, communication among said arrays is decreased and emulation efficiency is increased.

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