The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
May. 18, 2010
Filed:
Feb. 04, 2008
Shigehiro Asano, Austin, TX (US);
Jeffrey Douglas Brown, Rochester, MN (US);
Michael Norman Day, Round Rock, TX (US);
Charles Ray Johns, Austin, TX (US);
James Allan Kahle, Austin, TX (US);
Alvan Wing NG, Austin, TX (US);
Michael Fan Wang, Austin, TX (US);
Thuong Quang Truong, Austin, TX (US);
Shigehiro Asano, Austin, TX (US);
Jeffrey Douglas Brown, Rochester, MN (US);
Michael Norman Day, Round Rock, TX (US);
Charles Ray Johns, Austin, TX (US);
James Allan Kahle, Austin, TX (US);
Alvan Wing Ng, Austin, TX (US);
Michael Fan Wang, Austin, TX (US);
Thuong Quang Truong, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A component of a microprocessor-based data processing system, which includes features for regulating power consumption in snoopable components and has gating off memory coherency properties, is determined to be in a relatively inactive state and is transitioned to a non-snoopable low power mode. Then, when a snoop request occurs, a retry protocol is sent in response to the snoop request. In conjunction with the retry protocol, a signal is sent to bring the component into snoopable mode. When the retry snoop is requested, the component is in full power mode and can properly respond to the snoop request. After the snoop request has been satisfied, the component again enters into a low power mode. Therefore, the component is able to enter into a low power mode in between snoops