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Insertion of coherence requests for debugging a multiprocessor

United States Patent

February 23, 2010
View the Complete Patent at the US Patent & Trademark Office
A method and system are disclosed to insert coherence events in a multiprocessor computer system, and to present those coherence events to the processors of the multiprocessor computer system for analysis and debugging purposes. The coherence events are inserted in the computer system by adding one or more special insert registers. By writing into the insert registers, coherence events are inserted in the multiprocessor system as if they were generated by the normal coherence protocol. Once these coherence events are processed, the processing of coherence events can continue in the normal operation mode.
Blumrich; Matthias A. (Ridgefield, CT), Salapura; Valentina (Chappaqua, NY)
International Business Machines Corporation (Armonk, NY)
11/ 768,547
June 26, 2007
GOVERNMENT RIGHTS This invention was made with Government support under Contract No.: B554331, awarded by Department of Energy. The Government has certain rights to this invention.