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:
May. 10, 2005
Filed:
Sep. 30, 2002
Sudheendra Hangal, Bangalore, IN;
Durgam Vahia, San Jose, CA (US);
Juin-yeu LU, Campbell, CA (US);
Chaiyasit Manovit, Sanford, CA (US);
Sudheendra Hangal, Bangalore, IN;
Durgam Vahia, San Jose, CA (US);
Juin-Yeu Lu, Campbell, CA (US);
Chaiyasit Manovit, Sanford, CA (US);
Sun Microsystems, Inc., Palo Alto, CA (US);
Abstract
A system and method for verifying a memory consistency model for a shared memory multiprocessor computer systems generates random instructions to run on the processors, saves the results of the running of the instructions, and analyzes the results to detect a memory subsystem error if the results fall outside of the space of possible outcomes consistent with the memory consistency model. A precedence relationship of the results is determined by uniquely identifying results of a store location with each result distinct to allow association of a read result value to the instruction that created the read result value. A precedence graph with static, direct and derived edges identifies errors when a cycle is detected that indicates results that are inconsistent with memory consistency model rules.