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:
Nov. 10, 2020
Filed:
Dec. 15, 2017
International Business Machines Corporation, Armonk, NY (US);
Markus Helms, Boeblingen, DE;
Christian Jacobi, West Park, NY (US);
Ulrich Mayer, Weil im Schoenbuch, DE;
Martin Recktenwald, Schoenaich, DE;
Johannes C. Reichart, Highland, NY (US);
Anthony Saporito, Highland, NY (US);
Aaron Tsai, Poughkeepsie, NY (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Disclosed herein is a virtual cache and method in a processor for supporting multiple threads on the same cache line. The processor is configured to support virtual memory and multiple threads. The virtual cache directory includes a plurality of directory entries, each entry is associated with a cache line. Each cache line has a corresponding tag. The tag includes a logical address, an address space identifier, a real address bit indicator, and a per thread validity bit for each thread that accesses the cache line. When a subsequent thread determines that the cache line is valid for that thread the validity bit for that thread is set, while not invalidating any validity bits for other threads.