Snoop filtering mechanism
US8185695B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 30, 2008 |
| Grant date | May 22, 2012 |
| Priority date | — |
| Expiry date | Mar 1, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02D10/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system and method for selectively transmitting probe commands and reducing network traffic. Directory entries are maintained to filter probe command and response traffic for certain coherent transactions. Rather than storing directory entries in a dedicated directory storage, directory entries may be stored in designated locations of a shared cache memory subsystem, such as an L3 cache. Directory entries are stored within the shared cache memory subsystem to provide indications of lines (or blocks) that may be cached in exclusive-modified, owned, shared, shared-one, or invalid coherency states. The absence of a directory entry for a particular line may imply that the line is not cached anywhere in a computing system.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.