Replenishing data descriptors in a DMA injection FIFO buffer
- Rochester, MN
- Cortlandt Manor, NY
- White Plains, NY
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.
- Research Organization:
- International Business Machines Corp., Armonk, NY (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- B554331
- Assignee:
- International Business Machines Corporation (Armonk, NY)
- Patent Number(s):
- 8,037,213
- Application Number:
- 11/755,501
- OSTI ID:
- 1028985
- Resource Relation:
- Patent File Date: 2007 May 30
- Country of Publication:
- United States
- Language:
- English
The Blue Gene/L Supercomputer: A Hardware and Software Story
|
journal | May 2007 |
Similar Records
Increasing available FIFO space to prevent messaging queue deadlocks in a DMA environment
Preventing messaging queue deadlocks in a DMA environment