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Title: Direct memory access transfer completion notification

Abstract

Methods, systems, and products are disclosed for DMA transfer completion notification that include: inserting, by an origin DMA on an origin node in an origin injection FIFO, a data descriptor for an application message; inserting, by the origin DMA, a reflection descriptor in the origin injection FIFO, the reflection descriptor specifying a remote get operation for injecting a completion notification descriptor in a reflection injection FIFO on a reflection node; transferring, by the origin DMA to a target node, the message in dependence upon the data descriptor; in response to completing the message transfer, transferring, by the origin DMA to the reflection node, the completion notification descriptor in dependence upon the reflection descriptor; receiving, by the origin DMA from the reflection node, a completion packet; and notifying, by the origin DMA in response to receiving the completion packet, the origin node's processing core that the message transfer is complete.

Inventors:
 [1]
  1. Rochester, MN
Publication Date:
Research Org.:
International Business Machines Corp., Armonk, NY (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1018035
Patent Number(s):
7,890,597
Application Number:
11/829,317
Assignee:
International Business Machines Corporation (Armonk, NY)
DOE Contract Number:  
B554331
Resource Type:
Patent
Resource Relation:
Patent File Date: 2007 Jul 27
Country of Publication:
United States
Language:
English
Subject:
97 MATHEMATICS AND COMPUTING

Citation Formats

Archer, Charles J., Michael A., and Jeffrey, J. Direct memory access transfer completion notification. United States: N. p., 2011. Web.
Archer, Charles J., Michael A., & Jeffrey, J. Direct memory access transfer completion notification. United States.
Archer, Charles J., Michael A., and Jeffrey, J. Tue . "Direct memory access transfer completion notification". United States. https://www.osti.gov/servlets/purl/1018035.
@article{osti_1018035,
title = {Direct memory access transfer completion notification},
author = {Archer, Charles J. and Michael A. and Jeffrey, J},
abstractNote = {Methods, systems, and products are disclosed for DMA transfer completion notification that include: inserting, by an origin DMA on an origin node in an origin injection FIFO, a data descriptor for an application message; inserting, by the origin DMA, a reflection descriptor in the origin injection FIFO, the reflection descriptor specifying a remote get operation for injecting a completion notification descriptor in a reflection injection FIFO on a reflection node; transferring, by the origin DMA to a target node, the message in dependence upon the data descriptor; in response to completing the message transfer, transferring, by the origin DMA to the reflection node, the completion notification descriptor in dependence upon the reflection descriptor; receiving, by the origin DMA from the reflection node, a completion packet; and notifying, by the origin DMA in response to receiving the completion packet, the origin node's processing core that the message transfer is complete.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {2}
}

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Works referenced in this record:

The Blue Gene/L Supercomputer: A Hardware and Software Story
journal, May 2007

  • Moreira, Jos√© E.; Salapura, Valentina; Almasi, George
  • International Journal of Parallel Programming, Vol. 35, Issue 3, p. 181-206
  • DOI: 10.1007/s10766-007-0037-2