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:
Jul. 31, 2001
Filed:
Dec. 17, 1996
Vernon K. Boland, Lexington, SC (US);
NCR Corporation, Dayton, OH (US);
Abstract
An improved affinity scheduling system for assigning processes to processors within a multiprocessor computer system which includes a plurality of processors and cache memories associated with each processor. The affinity scheduler affinitizes processes to processors so that processes which frequently modify the same data are affined to the same local processor—the processor whose cache memory includes the data being modified by the processes. The scheduler monitors the scheduling and execution of processes to identify processes which frequently modify data residing in the cache memory of a non-local processor. When a process is identified which requires access to data residing in the cache memory of a non-local processor with greater frequency than the process requires access to data residing in the cache memory of its affined local processor, the affinity of the process is changed to the non-local processor.