Replenishing data descriptors in a DMA injection FIFO buffer
Abstract
Methods, apparatus, and products are disclosed for replenishing data descriptors in a Direct Memory Access (`DMA`) injection first-in-first-out (`FIFO`) buffer that include: determining, by a messaging module on an origin compute node, whether a number of data descriptors in a DMA injection FIFO buffer exceeds a predetermined threshold, each data descriptor specifying an application message for transmission to a target compute node; queuing, by the messaging module, a plurality of new data descriptors in a pending descriptor queue if the number of the data descriptors in the DMA injection FIFO buffer exceeds the predetermined threshold; establishing, by the messaging module, interrupt criteria that specify when to replenish the injection FIFO buffer with the plurality of new data descriptors in the pending descriptor queue; and injecting, by the messaging module, the plurality of new data descriptors into the injection FIFO buffer in dependence upon the interrupt criteria.
- Inventors:
-
- Rochester, MN
- Cortlandt Manor, NY
- White Plains, NY
- Issue Date:
- Research Org.:
- International Business Machines Corp., Armonk, NY (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1028985
- Patent Number(s):
- 8037213
- Application Number:
- 11/755,501
- 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 May 30
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 97 MATHEMATICS AND COMPUTING
Citation Formats
Archer, Charles J, Blocksome, Michael A, Cernohous, Bob R, Heidelberger, Philip, Kumar, Sameer, and Parker, Jeffrey J. Replenishing data descriptors in a DMA injection FIFO buffer. United States: N. p., 2011.
Web.
Archer, Charles J, Blocksome, Michael A, Cernohous, Bob R, Heidelberger, Philip, Kumar, Sameer, & Parker, Jeffrey J. Replenishing data descriptors in a DMA injection FIFO buffer. United States.
Archer, Charles J, Blocksome, Michael A, Cernohous, Bob R, Heidelberger, Philip, Kumar, Sameer, and Parker, Jeffrey J. Tue .
"Replenishing data descriptors in a DMA injection FIFO buffer". United States. https://www.osti.gov/servlets/purl/1028985.
@article{osti_1028985,
title = {Replenishing data descriptors in a DMA injection FIFO buffer},
author = {Archer, Charles J and Blocksome, Michael A and Cernohous, Bob R and Heidelberger, Philip and Kumar, Sameer and Parker, Jeffrey J},
abstractNote = {Methods, apparatus, and products are disclosed for replenishing data descriptors in a Direct Memory Access (`DMA`) injection first-in-first-out (`FIFO`) buffer that include: determining, by a messaging module on an origin compute node, whether a number of data descriptors in a DMA injection FIFO buffer exceeds a predetermined threshold, each data descriptor specifying an application message for transmission to a target compute node; queuing, by the messaging module, a plurality of new data descriptors in a pending descriptor queue if the number of the data descriptors in the DMA injection FIFO buffer exceeds the predetermined threshold; establishing, by the messaging module, interrupt criteria that specify when to replenish the injection FIFO buffer with the plurality of new data descriptors in the pending descriptor queue; and injecting, by the messaging module, the plurality of new data descriptors into the injection FIFO buffer in dependence upon the interrupt criteria.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2011},
month = {10}
}
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