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:
-
- (Rochester, MN), Blocksome
- (Rochester, MN), Parker
- Rochester, MN
- Issue Date:
- Research Org.:
- International Business Machines Corp., Armonk, NY (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1018035
- Patent Number(s):
- 7890597
- Application Number:
- 11/829,317
- 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
- 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 = {Tue Feb 15 00:00:00 EST 2011},
month = {Tue Feb 15 00:00:00 EST 2011}
}
Works referenced in this record:
The Blue Gene/L Supercomputer: A Hardware and Software Story
journal, May 2007
- Moreira, José E.; Salapura, Valentina; Almasi, George
- International Journal of Parallel Programming, Vol. 35, Issue 3, p. 181-206