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.

Date of Patent:
Jul. 10, 2018

Filed:

Jul. 01, 2016
Applicant:

International Business Machines Corporation, Armonk, NY (US);

Inventors:

Bulent Abali, Tenafly, NJ (US);

John S. Dodson, Austin, TX (US);

Moinuddin K. Qureshi, Atlanta, GA (US);

Balaram Sinharoy, Poughkeepsie, NY (US);

Attorneys:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G06F 12/02 (2006.01); G06F 12/0864 (2016.01); G06F 12/121 (2016.01); G06F 12/0873 (2016.01); G06F 12/0895 (2016.01); G06F 12/128 (2016.01);
U.S. Cl.
CPC ...
G06F 12/0864 (2013.01); G06F 12/0873 (2013.01); G06F 12/0895 (2013.01); G06F 12/121 (2013.01); G06F 12/128 (2013.01); G06F 2212/1016 (2013.01); G06F 2212/1056 (2013.01); G06F 2212/281 (2013.01); G06F 2212/305 (2013.01); G06F 2212/313 (2013.01); G06F 2212/6032 (2013.04); G06F 2212/6082 (2013.01);
Abstract

A computer cache memory organization called Probabilistic Set Associative Cache (PAC) has the hardware complexity and latency of a direct-mapped cache but functions as a set-associative cache for a fraction of the time, thus yielding better than direct mapped cache hit rates. The organization is considered a (1+P)-way set associative cache, where the chosen parameter called Override Probability P determines the average associativity, for example, for P=0.1, effectively it operates as if a 1.1-way set associative cache.


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