×

Data communications in a parallel active messaging interface of a parallel computer

  • US 8,891,371 B2
  • Filed: 11/14/2012
  • Issued: 11/18/2014
  • Est. Priority Date: 11/30/2010
  • Status: Active Grant
First Claim
Patent Images

1. A method of data communications in a parallel active messaging interface (‘

  • PAMI’

    ) of a parallel computer, the parallel computer comprising a plurality of compute nodes that execute a parallel application, the PAMI comprising data communications endpoints, each endpoint comprising a specification of data communications parameters for a thread of execution on a compute node, including specifications of a client, a context, and a task, the compute nodes and the endpoints coupled for data communications through the PAMI and through data communications resources, the method comprising;

    receiving in an origin endpoint of the PAMI a SEND instruction, the SEND instruction specifying a transmission of transfer data from the origin endpoint to a first target endpoint of a plurality of target endpoints;

    transmitting from the origin endpoint to the first target endpoint a Request-To-Send (‘

    RTS’

    ) message advising the first target endpoint of the location and size of the transfer data;

    assigning by the first target endpoint to each of the plurality of target endpoints separate portions of the transfer data by;

    dividing the size of the transfer data by the number of the plurality of target endpoints, andposting receive instructions in work queues of contexts of each of the plurality of target endpoints, each receive instruction specifying a separate portion of the transfer data by a pointer to a separate sub-portion of a source buffer of the first target endpoint; and

    receiving by the plurality of target endpoints the transfer data.

View all claims
  • 1 Assignment
Timeline View
Assignment View
    ×
    ×