Store buffer for transactional memory

US8977823B2 · kind B2 · utility

Assignee

• International Business Machines Corporation · US

Inventors

• Khary J. Alexander · Poughkeepsie, US
• Christian Jacobi · West Park, US
• Gerrit Koch · Herrenberg, DE
• Martin Recktenwald · Eppelheim, DE
• Timothy J. Slegel · Staatsburg, US
• Hans-Werner Tast · Holzgerlingen, DE

Key dates

• Filing date: Sep 16, 2012
• Grant date: Mar 10, 2015
• Expiry date: Apr 5, 2033

Classification

• Technology area (CPC G): Physics
• CPC primary: G06F9/467
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

Provided are techniques for handling a store buffer in conjunction with a processor, the store buffer comprising a free list; a merge window; and an evict list; and logic, for, upon receipt of a T_STORE operation, comparing a first address associated with the T_STORE operation with a plurality of addresses associated with previous T_STORE operations, wherein the previous T_STORE operations are part of the same transaction as the T_STORE operation and the entries corresponding to the previous T_STORE operations are stored in the merge window; in response to a match between the first address and a second address, associated with a second T_STORE operation, of the plurality of addresses, merging a first entry corresponding to the first T_STORE operation with a second entry corresponding to the second T_STORE operation; and consolidating results associated with the first T_STORE operation with results associated with the second T_STORE operation.