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Title: 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:
 [1];  [1];  [1];  [2];  [3];  [1]
  1. Rochester, MN
  2. Cortlandt Manor, NY
  3. White Plains, NY
Publication Date:
Research Org.:
International Business Machines Corp., Armonk, NY (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1028985
Patent Number(s):
8,037,213
Application Number:
11/755,501
Assignee:
International Business Machines Corporation (Armonk, NY)
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}
}

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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