Cache partitioning with a partition table to effect allocation of ways and rows of the cache to virtual machine in virtualized environments
US8745618B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 25, 2009 |
| Grant date | Jun 3, 2014 |
| Priority date | — |
| Expiry date | Jul 19, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F12/0864
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A mechanism is provided in a virtual machine monitor for providing cache partitioning in virtualized environments. The mechanism assigns a virtual identification (ID) to each virtual machine in the virtualized environment. The processing core stores the virtual ID of the virtual machine in a special register. The mechanism also creates an entry for the virtual machine in a partition table. The mechanism may partition a shared cache using a vertical (way) partition and/or a horizontal partition. The entry in the partition table includes a vertical partition control and a horizontal partition control. For each cache access, the virtual machine passes the virtual ID along with the address to the shared cache. If the cache access results in a miss, the shared cache uses the partition table to select a victim cache line for replacement.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.