Techniques for cache memory management using read and write operations
US7039765B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Dec 19, 2002 |
| Grant date | May 2, 2006 |
| Priority date | — |
| Expiry date | Nov 14, 2023 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/312
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Techniques for cache memory management using read and write operations. A read or a write operation to a storage system is initiated for data that is held in a host system cache, but is ready to be evicted from the host system cache. In response to the read operation, the data stored in a mass-storage medium of the storage system is copied to the storage system cache memory in preparation for transfer to the host system. However, the read operation is initiated when the data is not presently needed by the host system. In response to the write operation, the data stored in the host system cache is copied to the storage system cache in preparation for transfer to the mass-storage medium. However, the write operation is initiated when the data is already stored in the mass-storage medium. Then, the data is evicted from the host system cache. This results in exclusivity in that the data becomes present in the storage system cache, but is no longer present in the host system cache.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.