Method and apparatus to support enhanced energy efficiency...

Details Method and apparatus to support enhanced energy efficiency... Method and apparatus to support enhanced energy efficiency...

2006-02-10

2009-12-08

Lee, Thomas (Department: 2116)

Electrical computers and digital processing systems: support

Computer power control

Power conservation

Reexamination Certificate

active

07631206

ABSTRACT:
A first partition of a processing system may use polling to communicate with a device. In addition, the first partition may provide an interface that allows a second partition of the processing system to communicate with the device without requiring the second partition to use polling. For example, the first partition may present the device to the second partition as an interrupt-driven device. In one embodiment, the first partition creates an interface that presents a universal serial bus (USB) peripheral device to the second partition as a legacy peripheral device. The second partition my therefore use the device without conducting polling, and may consume less energy than a partition that conducts polling. Other embodiments are described and claimed.

REFERENCES:
patent: 3601645 (1971-08-01), Whitehead
patent: 4241271 (1980-12-01), Johnson et al.
patent: 6279046 (2001-08-01), Armstrong et al.
patent: 6700292 (2004-03-01), Otani et al.
patent: 2002/0144025 (2002-10-01), Poisner et al.
patent: 2006/0281630 (2006-12-01), Bailey et al.
patent: 2007/0005919 (2007-01-01), van Riel
ACPI specification, Revision 3.0a, Dec. 30, 2005 (available from http://www.acpi.info/spec.htm).

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