Unisys Corporation

Douglas H Bloom

Mitchell A Bauman

Larry L Byers

Joseba M Desubijan

The current invention provides a system and method for managing data stored within a main storage device such as a main memory. In one embodiment, multiple requesters are coupled to the main storage device to store copies of ones of the data signals. A directory is coupled to the main storage device to store directory signals that describe the most recent copy of each the data signals. Another storage device is coupled to the directory to store a subset of the directory signals that describes a predetermined subset of the data signals. This subset of directory signals can be used to access any of the predetermined subset of the data signals in an accelerated manner.

System and method for accelerating ownership within a directory-based memory system

Method and apparatus for synchronizing the execution of the two or more test lists at desired synchronization points, while allowing the test lists to execute in a non-deterministic manner between the synchronization points is disclosed. A test driver is provided for executing each test list, and a run controller is provided for monitoring the execution of each test list. To synchronize the execution of the two or more test lists, the run controller halts the execution of each test list as each test driver assumes a predetermined state. Once all of the test lists are halted, the test lists are synchronized. Once synchronized, selected test drivers are restarted to continue execution of the corresponding test lists in a relatively non-deterministic manner.

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White Bear Township, MN, United States of America

Douglas H Bloom