Multi-core processor cache coherence for reduced off-chip traffic
US8615633B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Apr 23, 2009 |
| Grant date | Dec 24, 2013 |
| Priority date | — |
| Expiry date | Aug 13, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0833
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Technologies are generally for maintaining cache coherency within a multi-core processor. A first cache entry to be evicted from a first cache may be identified. The first cache entry may include a block of data and a first tag indicating an owned state. An owner eviction message for the first cache entry may be broadcasted from the first cache. A second cache entry in a second cache may be identified. The second cache entry may include the block of data and a second tag indicating a shared state. The broadcasted owner eviction message may be detected with the second cache. An ownership acceptance message for the second cache entry may be broadcasted from the second cache. The broadcasted ownership acceptance message may be detected with the first cache. The second tag in the second cache entry may be transformed from the shared state to the owned state.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.