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. 15, 2014
Filed:
Apr. 12, 2012
Tong Chen, Yorktown Heights, NY (US);
Brian Flachs, Georgetown, TX (US);
Brad W. Michael, Cedar Park, TX (US);
Mark R. Nutter, Austin, TX (US);
John K. P. O'brien, South Salem, NY (US);
Kathryn M. O'brien, South Salem, NY (US);
Tao Zhang, Jersey City, NJ (US);
Tong Chen, Yorktown Heights, NY (US);
Brian Flachs, Georgetown, TX (US);
Brad W. Michael, Cedar Park, TX (US);
Mark R. Nutter, Austin, TX (US);
John K. P. O'Brien, South Salem, NY (US);
Kathryn M. O'Brien, South Salem, NY (US);
Tao Zhang, Jersey City, NJ (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Mechanisms are provided for evicting cache lines from an instruction cache of the data processing system. The mechanisms store, for a portion of code in a current cache line, a linked list of call sites that directly or indirectly target the portion of code in the current cache line. A determination is made as to whether the current cache line is to be evicted from the instruction cache. The linked list of call sites is processed to identify one or more rewritten branch instructions having associated branch stubs, that either directly or indirectly target the portion of code in the current cache line. In addition, the one or more rewritten branch instructions are rewritten to restore the one or more rewritten branch instructions to an original state based on information in the associated branch stubs.