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:
Jun. 19, 2001
Filed:
Aug. 19, 1998
Jose Melanio Nunez, Austin, TX (US);
Thomas Albert Petersen, Austin, TX (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A method for improving data processing in an L,cache for symmetrical multiprocessing systems consists of efficient execution of cache control instructions without having to give up the data bandwidth provided by a greater byte coherency granule. The L,cache has a coherency granule size within its data array and is divided into a target sector and an alternate sector. Additionally, the coherency granule has a plurality of MESI bits, which define sector write enables, and data write enables. By determining the states of the target sector and/or the alternate sector a series of L,cache control instructions are performed to signal the L,cache to hit. If a hit occurs corresponding data will be either written into or read out of the data array.