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Low overhead exclusive control for shared memory objects

  • US 10,579,550 B2
  • Filed: 11/01/2017
  • Issued: 03/03/2020
  • Est. Priority Date: 04/05/2017
  • Status: Active Grant
First Claim
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1. A computer-implemented method for exclusive control of shared memory objects, the method comprising:

  • transmitting and performing a plurality of accesses to the shared memory objects from local and remote locations via read requests and write requests made to a memory;

    controlling the read and write requests by a memory controller incorporating therein a read queue, a write queue, and a lock address list, each slot of the lock address list associated with a lock bit;

    initiating each read request to the memory via the memory controller whatever the corresponding lock bit is and changing status of corresponding slot to lock (reserve);

    initiating each write request to the memory from a recently read location via the memory controller when the corresponding lock bit is enabled, otherwise notify the requesting local or remote locations as incomplete, and changing status of corresponding slot to unlocked; and

    enabling the corresponding lock bit after the initiation of the read request to the memory and disabling the corresponding lock bit after the initiation of the write request to the memory.

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