Queue depth management for communication between host and peripheral device
US7610413B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 3, 2005 |
| Grant date | Oct 27, 2009 |
| Priority date | — |
| Expiry date | Dec 18, 2025 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F13/4282
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
Method for managing a queue in host memory for use with a peripheral device. Roughly described, the host makes a determination of the availability of space in the queue for writing new entries, in dependence upon historical knowledge of the number of queue entries that the host has authorized the device to write, and the number of entries that the host has consumed. In dependence on that determination, the host authorizes the device to write a limited number of new entries into the queue. The device writes entries into the queue dependence upon the number authorized. The host maintains a read pointer into the queue but does not need to maintain a write pointer, and the peripheral device maintains a write pointer into the queue but does not need to maintain a read pointer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.