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. 04, 2010
Filed:
Mar. 22, 2007
Philip G. Emma, Danbury, CT (US);
Daniel N. Lynch, Austin, TX (US);
Thomas R. Puzak, Ridgefield, CT (US);
Philip G. Emma, Danbury, CT (US);
Daniel N. Lynch, Austin, TX (US);
Thomas R. Puzak, Ridgefield, CT (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A system, method and computer program product for executing a cache replacement algorithm. A system includes a computer processor having an instruction processor, a cache and one or more useful indicators. The instruction processor processes instructions in a running program. The cache includes two or more cache levels including a level one (L1) cache level and one or more higher cache levels. Each cache level includes one or more cache lines and has an associated directory having one or more directory entries. A useful indicator is located within one or more of the directory entries and is associated with a particular cache line. The useful indicator is set to provide an indication that the associated cache line contains one or more instructions that are required by the running program and cleared to provide lack of such an indication.