Final cache directory state indication
US11907132B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 23, 2022 |
| Grant date | Feb 20, 2024 |
| Priority date | — |
| Expiry date | Mar 23, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/622
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for managing designated authority status in a cache line includes identifying an initial designated authority (DA) member cache for a cache line, transferring DA status from the initial DA member cache to a new DA member cache, determining whether the new DA member cache is active, indicating a final state of the initial DA cache responsive to determining that the new DA member cache is active, and overriding a DA state in a cache control structure in a directory. A method for managing cache accesses during a designated authority transfer includes receiving a designated authority (DA) status transfer request, receiving an indication that a first cache will invalidate its copy of the cache line, allowing a second cache to assume DA status for the cache line, and denying access to the first cache's copy of the cache line until invalidation by the first cache is complete.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.