×

Intranode data communications in a parallel computer

  • US 8,627,334 B2
  • Filed: 12/10/2012
  • Issued: 01/07/2014
  • Est. Priority Date: 11/07/2011
  • Status: Expired due to Fees
First Claim
Patent Images

1. A method of intranode data communications in a parallel computer, the parallel computer comprising a plurality of compute nodes, each compute node of the plurality of compute nodes configured to execute a plurality of processes, the method comprising:

  • upon initialization of a first process of one of the plurality of compute nodes, allocating, by the first process, a region of shared memory;

    establishing, by the first process within the allocated region of shared memory, a predefined number of message buffers, each message buffer associated with one of the plurality of processes to be initialized on the one of the plurality of compute nodes;

    sending, by the first process to a second process of the one of the plurality of compute nodes, a data communications message without determining whether the second process has been initialized, including storing the data communications message in the message buffer of the second process;

    upon initialization of the second process;

    retrieving, by the second process, a pointer to the second process'"'"'s message buffer; and

    retrieving, by the second process from the second process'"'"'s message buffer in dependence upon the pointer, the data communications message sent by the first process, wherein;

    the parallel computer comprises a parallel active messaging interface (‘

    PAMI’

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

    each process of the plurality of processes comprises one of the data communications endpoints;

    each client comprises a collection of data communications resources dedicated to exclusive use of an application-level data processing entity;

    each context comprises a subset of the collection of data processing resources of a client, context functions, and a work queue of data transfer instructions to be performed by use of the subset through the context functions operated by an assigned thread of execution;

    each task represents a process of execution of the parallel application; and

    each context carries out data communications operations independently and in parallel with other contexts.

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