Robert A Wisniewski

US Patent:

20120124298, May 17, 2012

Filed:

Nov 17, 2010

Appl. No.:

12/948058

Inventors:

ANDREW KENNETH MARTIN - Austin TX, US
Michael David Kistler - Austin TX, US
Robert W. Wisniewski - Ossining NY, US

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 12/00

US Classification:

711141, 711E12026

Abstract:

A method, system, and computer usable program product for local synchronization in a memory hierarchy in a multi-core data processing system are provided in the illustrative embodiments. A request to acquire a reservation for a reservation granule is received at a first core. The reservation is acquired in a first local cache associated with the first core in response to a cache line including the reservation granule being present and writable in the first local cache. A conditional store request to store at the reservation granule is received at the first core. A determination is made whether the reservation remains held at the first local cache. The store operation is performed at the first local cache responsive to reservation remaining held at the first local cache.