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Title: Fencing direct memory access data transfers in a parallel active messaging interface of a parallel computer

Abstract

Fencing direct memory access (`DMA`) data transfers in a parallel active messaging interface (`PAMI`) of a parallel computer, the PAMI including data communications endpoints, each endpoint including specifications of a client, a context, and a task, the endpoints coupled for data communications through the PAMI and through DMA controllers operatively coupled to segments of shared random access memory through which the DMA controllers deliver data communications deterministically, including initiating execution through the PAMI of an ordered sequence of active DMA instructions for DMA data transfers between two endpoints, effecting deterministic DMA data transfers through a DMA controller and a segment of shared memory; and executing through the PAMI, with no FENCE accounting for DMA data transfers, an active FENCE instruction, the FENCE instruction completing execution only after completion of all DMA instructions initiated prior to execution of the FENCE instruction for DMA data transfers between the two endpoints.

Inventors:
;
Issue Date:
Research Org.:
International Business Machines Corp., Armonk, NY (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1119666
Patent Number(s):
8650338
Application Number:
13/784,198
Assignee:
International Business Machines Corporation (Armonk, NY)
Patent Classifications (CPCs):
G - PHYSICS G06 - COMPUTING G06F - ELECTRIC DIGITAL DATA PROCESSING
DOE Contract Number:  
B554331
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
97 MATHEMATICS AND COMPUTING

Citation Formats

Blocksome, Michael A, and Mamidala, Amith R. Fencing direct memory access data transfers in a parallel active messaging interface of a parallel computer. United States: N. p., 2014. Web.
Blocksome, Michael A, & Mamidala, Amith R. Fencing direct memory access data transfers in a parallel active messaging interface of a parallel computer. United States.
Blocksome, Michael A, and Mamidala, Amith R. Tue . "Fencing direct memory access data transfers in a parallel active messaging interface of a parallel computer". United States. https://www.osti.gov/servlets/purl/1119666.
@article{osti_1119666,
title = {Fencing direct memory access data transfers in a parallel active messaging interface of a parallel computer},
author = {Blocksome, Michael A and Mamidala, Amith R},
abstractNote = {Fencing direct memory access (`DMA`) data transfers in a parallel active messaging interface (`PAMI`) of a parallel computer, the PAMI including data communications endpoints, each endpoint including specifications of a client, a context, and a task, the endpoints coupled for data communications through the PAMI and through DMA controllers operatively coupled to segments of shared random access memory through which the DMA controllers deliver data communications deterministically, including initiating execution through the PAMI of an ordered sequence of active DMA instructions for DMA data transfers between two endpoints, effecting deterministic DMA data transfers through a DMA controller and a segment of shared memory; and executing through the PAMI, with no FENCE accounting for DMA data transfers, an active FENCE instruction, the FENCE instruction completing execution only after completion of all DMA instructions initiated prior to execution of the FENCE instruction for DMA data transfers between the two endpoints.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2014},
month = {2}
}

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Works referenced in this record:

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