Information processor with suppressed cache coherence in low...

Details Information processor with suppressed cache coherence in low... Information processor with suppressed cache coherence in low...

2007-08-07

2007-08-07

Lee, Thomas (Department: 2115)

Electrical computers and digital processing systems: support

Computer power control

Power conservation

C713S300000

Reexamination Certificate

active

10730672

ABSTRACT:
An information processor having a normal-operation mode in which coherence control is performed for making data in a cache memory of a processor identical to data in a main memory and a power-saving mode in which the coherence control is suppressed to lower the power consumption from power consumption in the normal-operation mode and entering the normal-operation mode when an input/output device accesses the main memory in the power-saving mode includes an attribute setting module for setting a device area of the main memory, accessed by the input/output device of the information processor to a non-cacheable attribute for exempting said device area from said coherence control even in the normal-operation mode; an operation mode setting module for allowing the input/output device to access the device area while keeping the operation mode of the information processor in the power-saving mode when the input/output device requests access to the device area in the power-saving mode.

REFERENCES:
patent: 4680730 (1987-07-01), Omoda et al.
patent: 5125084 (1992-06-01), Begun et al.
patent: 5157774 (1992-10-01), Culley
patent: 5210850 (1993-05-01), Kelly et al.
patent: 5481731 (1996-01-01), Conary et al.
patent: 6014751 (2000-01-01), Kardach et al.

Affiliated with

Also associated with

Rating

Information processor with suppressed cache coherence in low... does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Information processor with suppressed cache coherence in low..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Information processor with suppressed cache coherence in low... will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-3869324