Early coherency indication for return data in shared memory architecture
US8010682B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2004 |
| Grant date | Aug 30, 2011 |
| Priority date | — |
| Expiry date | Jun 29, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/507
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a shared memory architecture, early coherency indication is used to notify a communications interface, prior to the data for a memory request is returned, and prior to updating a coherency directory in response to the memory request, that the return data can be used by the communications interface when it is received thereby from a source of the return data. By doing so, the communications interface can often begin forwarding the return data over its associated communication link with little or no latency once the data is retrieved from its source. In addition, the communications interface is often no longer required to wait for updating of the coherency directory to complete prior to forwarding the return data over the communication link. As such, the overall latency for handling the memory request is typically reduced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.