Method and apparatus for simulation of data in a virtual environment using a queued direct input-output device
US6345241B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 19, 1999 |
| Grant date | Feb 5, 2002 |
| Priority date | — |
| Expiry date | Feb 19, 2019 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F2009/45595
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method and an apparatus for simulation of data in a computing system environment having a controlling program, a main memory, a plurality of hosts, at least one adapter and a queued-direct input/output device using a queued-direct input/output protocol. A pageable virtual machine is provided under control of a virtual-machine hypervisor in processing communication with one or more hosts. Simulation is then provided by strictly separating a set of protocol control blocks between those that contain main-memory addresses and those that do not. Copies of those control blocks that contain main-memory addresses is created and their addresses converted by the hypervisor from addresses used by the program in its virtual machine to real-memory addresses usable by the adapter.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.