Electrical computers and digital processing systems: memory – Storage accessing and control – Control technique
Reexamination Certificate
2005-05-10
2005-05-10
Nguyen, Hiep T. (Department: 2187)
Electrical computers and digital processing systems: memory
Storage accessing and control
Control technique
C711S141000, C712S030000
Reexamination Certificate
active
06892286
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.
REFERENCES:
patent: 5692153 (1997-11-01), Malik et al.
patent: 20020166032 (2002-11-01), Qadeer
Hangal Sudheendra
Lu Juin-Yeu
Manovit Chaiyasit
Vahia Durgam
Hamilton & Terrile LLP
Holland Robert W.
Nguyen Hiep T.
Sun Microsystems Inc.
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