Multiprocessor system with multiple concurrent modes of execution

Title: Multiprocessor system with multiple concurrent modes of execution

A multiprocessor system supports multiple concurrent modes of speculative execution. Speculation identification numbers (IDs) are allocated to speculative threads from a pool of available numbers. The pool is divided into domains, with each domain being assigned to a mode of speculation. Modes of speculation include TM, TLS, and rollback. Allocation of the IDs is carried out with respect to a central state table and using hardware pointers. The IDs are used for writing different versions of speculative results in different ways of a set in a cache memory.

Inventors:: Ahn, Daniel; Ceze, Luis H.; Chen, Dong Chen; Gara, Alan; Heidelberger, Philip; Ohmacht, Martin

Issue Date:: 2016-11-22

OSTI Identifier:: 1333218

Assignee:: International Business Machines Corporation (Armonk, NY) OSTI

Patent Number(s):: 9,501,333

Application Number:: 14/143,783

Contract Number:: B554331

Resource Relation:: Patent File Date: 2013 Dec 30

Research Org:: International Business Machines Corporation, Armonk, NY (United States)

Sponsoring Org:: USDOE

Country of Publication:: United States

Language:: English

Subject:: 97 MATHEMATICS AND COMPUTING

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Works referenced in this record:

Fast synchronization on shared-memory multiprocessors: An architectural approach
journal, October 2005

Fang, Zhen; Zhang, Lixin; Carter, John B.
Journal of Parallel and Distributed Computing, Vol. 65, Issue 10, p. 1158-1170
DOI: 10.1016/j.jpdc.2005.04.013

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