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Title: Direct memory access transfer completion notification

Abstract

Methods, apparatus, and products are disclosed for DMA transfer completion notification that include: inserting, by an origin DMA engine on an origin compute node in an injection FIFO buffer, a data descriptor for an application message to be transferred to a target compute node on behalf of an application on the origin compute node; inserting, by the origin DMA engine, a completion notification descriptor in the injection FIFO buffer after the data descriptor for the message, the completion notification descriptor specifying an address of a completion notification field in application storage for the application; transferring, by the origin DMA engine to the target compute node, the message in dependence upon the data descriptor; and notifying, by the origin DMA engine, the application that the transfer of the message is complete, including performing a local direct put operation to store predesignated notification data at the address of the completion notification field.

Inventors:
 [1];  [1];  [1]
  1. Rochester, MN
Issue Date:
Research Org.:
International Business Machines Corporation (Armonk, NY)
Sponsoring Org.:
USDOE
OSTI Identifier:
1013811
Patent Number(s):
7,779,173
Application Number:
11/754,719
Assignee:
International Business Machines Corporation (Armonk, NY)
DOE Contract Number:  
B554331
Resource Type:
Patent
Country of Publication:
United States
Language:
English

Citation Formats

Archer, Charles J, Blocksome, Michael A, and Parker, Jeffrey J. Direct memory access transfer completion notification. United States: N. p., 2010. Web.
Archer, Charles J, Blocksome, Michael A, & Parker, Jeffrey J. Direct memory access transfer completion notification. United States.
Archer, Charles J, Blocksome, Michael A, and Parker, Jeffrey J. Tue . "Direct memory access transfer completion notification". United States. https://www.osti.gov/servlets/purl/1013811.
@article{osti_1013811,
title = {Direct memory access transfer completion notification},
author = {Archer, Charles J and Blocksome, Michael A and Parker, Jeffrey J},
abstractNote = {Methods, apparatus, and products are disclosed for DMA transfer completion notification that include: inserting, by an origin DMA engine on an origin compute node in an injection FIFO buffer, a data descriptor for an application message to be transferred to a target compute node on behalf of an application on the origin compute node; inserting, by the origin DMA engine, a completion notification descriptor in the injection FIFO buffer after the data descriptor for the message, the completion notification descriptor specifying an address of a completion notification field in application storage for the application; transferring, by the origin DMA engine to the target compute node, the message in dependence upon the data descriptor; and notifying, by the origin DMA engine, the application that the transfer of the message is complete, including performing a local direct put operation to store predesignated notification data at the address of the completion notification field.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2010},
month = {8}
}

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