Virtual machine dispatching to maintain memory affinity
US8024728B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 28, 2006 |
| Grant date | Sep 20, 2011 |
| Priority date | — |
| Expiry date | Jul 20, 2030 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F9/5077
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A computer implemented method, data processing system, and computer usable program code are provided for dispatching virtual processors. A determination is made as to whether a physical processor in a set of physical processors is idle, and, if so, a determination is made as to whether an affinity map for the idle physical processor exists. Responsive to an existence of the affinity map, a determination is made as to whether a virtual processor last mapped to the idle physical processor is ready to run using the affinity map and a dispatch algorithm. Responsive to identifying a ready-to-run virtual processor whose affinity map indicates that the idle physical processor is mapped to this virtual processor in its preceding dispatch, the ready-to-run virtual processor is dispatched to the idle physical processor. Thus, memory affinity is maintained between physical and virtual processors when the memory affinity is not expired.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.