Method for improving memory system performance in virtual machine systems
US9529728B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 7, 2010 |
| Grant date | Dec 27, 2016 |
| Priority date | — |
| Expiry date | Nov 10, 2034 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2212/656
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Updating contents of certain memory pages in a virtual machine system is deferred until they are needed. Specifically, certain page update operations are deferred until the page is accessed for a load or store operation. Each page within the virtual machine system includes associated metadata, which includes a page signature characterizing the contents of a corresponding page or a reference to a page with canonical contents, and a flag that indicates the page needs to be updated before being accessed. The metadata may also include a flag to indicate that a backing store of the memory page has contents of a known content class. When such a memory page is mapped to a shared page with contents of that known content class, a flag in the metadata to indicate that contents of the memory page needs to be updated is not set.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.