Ring-based memory requests in a shared memory multi-processor
US6895477B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 25, 2002 |
| Grant date | May 17, 2005 |
| Priority date | — |
| Expiry date | Oct 24, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L47/822
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
A system includes a plurality of processing clusters and a snoop controller adapted to service memory requests. The snoop controller and each processing cluster are coupled to a snoop ring. A first processing cluster forwards a memory request to the snoop controller for access to a memory location. In response to the memory request, the snoop controller places a snoop request on the snoop ring—calling for a change in ownership of the requested memory location. A second processing cluster receives the snoop request on the snoop ring. The second processing cluster generates a response to the snoop request. If the second processing cluster owns the requested memory location, the second processing cluster modifies ownership status of the requested memory location.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.