Message passing using direct memory access unit in a data processing system
US8615614B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 30, 2011 |
| Grant date | Dec 24, 2013 |
| Priority date | — |
| Expiry date | Jun 18, 2032 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/28
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method includes generating, by a first software process of the data processing system, a source partition descriptor for a DMA job which requires access to a first partition of a memory which is assigned to a second software process of the data processing system and not assigned to the first software process. The source partition descriptor comprises a partition identifier which identifies the first partition of the memory. The DMA unit receives the source partition descriptor and generates a destination partition descriptor for the DMA job. Generating the destination partition descriptor includes translating, by the DMA unit, the partition identifier to a buffer pool identifier which identifies a physical address within the first partition of the memory which is assigned to the second software process; and storing, by the DMA unit, the buffer pool identifier in the destination partition descriptor.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.