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. 03, 2012
Filed:
May. 28, 2008
Tong Chen, Yorktown Heights, NY (US);
John Kevin Patrick O'brien, South Salem, NY (US);
Kathryn O'brien, South Salem, NY (US);
Byoungro SO, Santa Clara, CA (US);
Zehra N. Sura, Yorktown Heights, NY (US);
Tao Zhang, Duluth, GA (US);
Tong Chen, Yorktown Heights, NY (US);
John Kevin Patrick O'Brien, South Salem, NY (US);
Kathryn O'Brien, South Salem, NY (US);
Byoungro So, Santa Clara, CA (US);
Zehra N. Sura, Yorktown Heights, NY (US);
Tao Zhang, Duluth, GA (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
A compiler implemented software cache in which non-aliased explicitly fetched data are excluded are provided. With the mechanisms of the illustrative embodiments, a compiler uses a forward data flow analysis to prove that there is no alias between the cached data and explicitly fetched data. Explicitly fetched data that has no alias in the cached data are excluded from the software cache. Explicitly fetched data that has aliases in the cached data are allowed to be stored in the software cache. In this way, there is no runtime overhead to maintain the correctness of the two copies of data. Moreover, the number of lines of the software cache that must be protected from eviction is decreased. This leads to a decrease in the amount of computation cycles required by the cache miss handler when evicting cache lines during cache miss handling.